Double Stars - Complete List

A detailed description of the project, the data sources, additional websites and how you can contribute visual observations and photographs of double stars to the project are summarized in our introduction.

Double star lists:
Double/Multiple Stars 2325
Visual Observations 3713
Sketches 334
Photographs 79
Observers 13
Berthold Fuchs, Sarah Gebauer, Christopher Hay, Claus-Dieter Jahn, Jens Leich, Stefan Loibl, Mark McCarthy, Rene Merting, Uwe Pilz, John Raymond, Joerg S. Schlimmer, Frederik Wanink, Robert Zebahl
m1 m2 ρ θ Year Coordinates (J2000)
★★★ STTA254, WZ Cas AB 7m4 8m3 57.8'' 89° 2018 Cas 00h01m15.85s +60°21'19.00"
AC 7m4 9m6 155.4'' 324° 2015
AD 7m4 10m3 181.4'' 118° 2016
Rene Merting
Drachhausen (Germany)
16x70 AB: ein schöner Fernglas-Doppelstern - Komponente A im Westen präsentiert sich dunkel-gelb (noch nicht orange), B im Osten ist eher weißlich
Robert Zebahl
Leipzig (Germany)
80mm (33x) AB: Nice double star. Brighter component appeared orange, the fainter more bluish.
Rene Merting
Drachhausen (Germany)
100mm (20x) AB: 20x reicht zwar schon für eine klare Trennung, aber Komponente B im Osten ist nur dumpf grau-blau und noch zu schwach für den schönen Farbkontrast, der sich bei 32x offenbart - Komponente A strahlt dann in einem satten Bernsteingelb, B im Osten gibt sich unterkühlt bläulich - Helligkeitsunterschied 1 bis 1.5 Größenklassen, schwierig abschätzbar wegen der Farben
Robert Zebahl
Leipzig (Germany)
102mm (28x) AB: Splendid view. Primary component clearly orange, secondary blue. ../projects/double-stars/robert-zebahl/sketches/2019-08-22_wz_cas.jpg
Joerg S. Schlimmer
Germany
127mm (136x) Sehr schöner Farbkontrast ../projects/double-stars/joerg-schlimmer/sketches/Zeichnung_WZ_Cas_filtered_96dpi.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: WZ Cas: Pretty, deep orange A and very wide half delta mag B, white.
Rene Merting
Drachhausen (Germany)
320mm (45x) AB: bei 45x ein weit getrenntes Pärchen mit wunderschönen Farbkontrast, Komponente A im Westen ist grell-orange und die gut 1.5 Magnituden schwächere Komponente B ist aquamarin-grau
Robert Zebahl
Leipzig (Germany)
102mm ../projects/double-stars/robert-zebahl/photographs/2019-07-16_wz_cas.jpg
STF3053 AB 6m0 7m2 15.0'' 70° 2018 Cas 00h02m36.08s +66°05'56.30"
Robert Zebahl
Leipzig (Germany)
63mm (46x) Easy to split with noticeable difference in brightness. Brighter component appeared slightly orange, fainter one bluish.
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 20x knapp getrennt, Komponente B östlich ist halb so hell wie A - während Komponente A weiß-gelblich strahlt, zeigt B sich weiß mit einem leichten Stich ins bläuliche
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty, orange and blue like Alberio. ~1.5 delta mag.
STF3051 7m7 9m5 16.8'' 23° 2015 Cep 00h02m46.53s +80°16'56.20"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein ordentlich getrenntes Sternpaar, Komponente B im NO ist gerade so erkennbar, gut 1.5 Größenklassen schwächer als A und leicht gräulich - zurück auf 20x sind beide Sterne knapp getrennt zu erkennen
STF3054 8m1 9m1 33.6'' 181° 2015 Psc 00h03m03.76s +08°16'14.50"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 20x ein sehr einfacher Doppelstern - Komponente B im Süden steht weit weg von A und ist gut eine Magnitude schwächer - bei 32x strahlt A warm-weiß, B dagegen wirkt matt-blau-grau
STF3055 AB 7m3 10m3 5.7'' 359° 2015 Peg 00h04m00.24s +12°08'45.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint yellow-orange A with very small faint blue B to N, ~3" sep.
STT514 AB 6m2 9m7 5.1'' 170° 2015 And 00h04m36.60s +42°05'33.20"
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 64x kommt Komponente B schwach zum Vorschein, Trennung ordentlich - vermutlich ist B für kleinere Vergrößerungen noch zu lichtschwach - bei 107x ist es dann leichter, die B-Komponente zu erfassen
STF3057 6m7 9m3 3.9'' 298° 2015 Cas 00h04m54.98s +58°31'55.80"
Rene Merting
Drachhausen (Germany)
100mm (64x) erst bei 64x wird die B-Komponente nordwestlich von A knapp getrennt schwach sichtbar (ich habe eher damit gerechnet) - bei 107x bleibt B schwach, Helligkeitsunterschied zu A mindestens zwei Größenklassen
Mark McCarthy
Fremont (California/USA)
317mm (277x) White with 2 delta mag blue-white B, 4-5".
Rene Merting
Drachhausen (Germany)
320mm (144x) bei 144x ein gut getrenntes Paar, bei der Komponente B im NW gut 2 Größenklassen schwächer strahlt - beide Sterne warm weiß
FOX103 6m2 10m7 13.1'' 149° 2015 Peg 00h04m55.93s +26°38'55.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange A. Very faint B to south, well separated.
BU997 7m6 9m4 3.8'' 337° 2015 And 00h04m57.53s +45°40'25.60"
Rene Merting
Drachhausen (Germany)
100mm (64x) knapp getrenntes Pärchen - großer Helligkeitsunterschied - schön zusammen mit dem unmittelbar östlich stehenden Doppelstern STT547
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and blue, pretty, well separated.
BU9001 AC 6m7 10m6 21.0'' 235° 2016 And 00h05m09.75s +45°13'44.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint companion, wide separation.
STT547 AB 9m0 9m2 6.0'' 190° 2018 And 00h05m41.03s +45°48'43.30"

../images/binary-star-orbits/STT547-AB-orbit-solution-1.jpg ../images/binary-star-orbits/STT547-AB-orbit-solution-2.jpg

Rene Merting
Drachhausen (Germany)
100mm (32x) bei 64x klare Trennung - ein relativ schwaches Pärchen - zurück auf 32x stehen beide dichter zusammen und können knapp getrennt werden
Uwe Pilz
Leipzig (Germany)
105mm (144x) Der nahe gelegene ß997 konnte nicht getrennt werden ../projects/double-stars/uwe-pilz/sketches/191123stt547.jpg
STF3061 8m4 8m5 7.8'' 149° 2016 Peg 00h05m44.45s +17°50'25.00"
Robert Zebahl
Leipzig (Germany)
70mm (22x) At 22x tiny pair with similarly bright, close components. Easy to separate at 44x. A small color difference was visible: The brighter component appeared somewhat warmer with a hint of orange, the fainter one slightly blueish.
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein knapp getrenntes Pärchen - Komponente B im SO ist nur unwesentlich schwächer - beide weiß - ein schickes enges Paar
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint, but not too faint, near equal brightness, white, well separated.
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/STF3061.png
STF3060 AB 9m3 9m7 3.4'' 136° 2016 Peg 00h05m55.56s +18°04'34.40"

../images/binary-star-orbits/STF3060-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Very close, ~3", equal brightness, pretty faint.
HU502 7m7 10m6 2.4'' 108° 1991 Cas 00h05m57.04s +49°37'20.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Hint of brightening, a bit of a smear in the diffraction. Marginal.
STF3062, V640 Cas 6m4 7m3 1.5'' 2018 Cas 00h06m15.81s +58°26'12.50"

../images/binary-star-orbits/STF3062-orbit.jpg

Robert Zebahl
Leipzig (Germany)
152mm (129x) Nice view, clearly split, but tight with visible difference in brightness.
Frederik Wanink
Itterbeck (Germany)
254mm (460x) leicht ../projects/double-stars/frederik-wanink/sketches/STF3062.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) Light yellow and a more orange yellow B, 3-4", 1 delta mag. PC (70.07 L.Y.)
Rene Merting
Drachhausen (Germany)
320mm (320x) erst bei 320x ist Komponente B knapp getrennt nördlich von A zu erkennen - beide Sterne sind relativ hell und haben relativ große Beugungsscheibchen, so dass die Trennung nur knapp zu sehen ist - nicht wirklich schön, wenn man in den Nächten vorher mit einem Refraktor Doppelsterne beobachtet hat
BU483 AC 7m0 7m7 158.5'' 268° 2015 And 00h09m03.67s +40°50'34.30"
Robert Zebahl
Leipzig (Germany)
8x40 Large distance with significant difference in brightness.
GIC2 AB 7m8 11m5 29.7'' 236° 2018 Peg 00h09m15.74s +25°16'55.00"
Mark McCarthy
Fremont (California/USA)
317mm (277x) New designation to me: Harry Giclas, Lowell proper motion survey -- the man who hired Robert Burnham! Faint yellow-orange star with fainter and very wide companion. Possible 3rd to make a triangle. (AB seen, 4 stars in system)
STF2 6m7 6m9 0.9'' 17° 2018 Cep 00h09m20.18s +79°42'52.40"

../images/binary-star-orbits/STF2-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (198x) Schneemann-Figur. Abstand 0“91 ../projects/double-stars/uwe-pilz/sketches/STF2.jpg
Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt ../projects/double-stars/frederik-wanink/sketches/STF2.jpg
STF5, 34 Psc 5m5 9m4 7.6'' 159° 2015 Psc 00h10m02.18s +11°08'44.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Hard white A, very faint but definite small point B to south, 4x fainter.
STF3 7m8 9m1 5.0'' 83° 2016 And 00h10m03.18s +46°23'25.10"
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 32x zeigt sich der Stern leicht länglich nach Osten verzogen - bei 64x knappe Trennung, Komponente B ist eine knappe Magnitude schwächer - A weiß, B grau-orange
Uwe Pilz
Leipzig (Germany)
105mm (200x) ../projects/double-stars/uwe-pilz/sketches/191123stf3.jpg
ARY8 AB 8m1 8m6 39.1'' 100° 2015 Cas 00h10m37.25s +58°44'53.60"
Mark McCarthy
Fremont (California/USA)
80mm (13x) There's a chain of doubles going south from Beta Cas, a pretty finder view, like stepping stones. The one closest to Beta Cas is Ary 8, which is actually a triple system of wide pairing.
STF7 8m0 8m5 1.3'' 210° 2017 Cas 00h11m38.91s +55°57'40.90"
Robert Zebahl
Leipzig (Germany)
152mm (210x) Clearly separated with rather close components. Slightly unequal. Pretty double.
STT2 AB-C 6m3 10m4 18.0'' 224° 2015 And 00h13m23.93s +26°59'15.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow A, well separated faint B
STF10 AB 8m0 8m6 17.5'' 176° 2015 Cas 00h14m49.33s +62°50'25.50"
Rene Merting
Drachhausen (Germany)
100mm (20x) 20x reichen für die Trennung des schön isoliert im Sternumfeld stehenden Paares - Komponente B im Süden ist eine halbe Magnitude schwächer - bei 32x ein Kuriosum beim Farbkontrast für mich, der zwar sichtbar ist, aber nicht richtig greifbar - das Farbenspiel weiß und weißlich-orange scheint immer zwischen beiden ein wenig hin und her zu wechseln
STF12, 35 Psc 6m1 7m5 11.5'' 148° 2018 Psc 00h14m58.84s +08°49'15.50"
Robert Zebahl
Leipzig (Germany)
70mm (22x) At 22x pretty bright but uneven pair with relatively close components. At 44x the brighter component looked slightly yellowish, the fainter one slightly blueish. The double star could be observed together with STF22 (38 Psc) in the same field of view and stands in nice contrast to it.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and white, ~1 delta mag, PA to S.
★★ HJ1947 AB 6m2 9m8 9.1'' 75° 2015 And 00h16m21.50s +43°35'42.40"
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 64x ist Komponente B sehr schwach östlich von A erkennbar - großer Helligkeitsunterschied, kaum abschätzbar, vielleicht 3-4 Größenklassen - schönes Doppel-Doppel zusammen mit STT5 nur 28' östlich - beide Paare haben in etwa die gleichen Helligkeiten und den gleichen Abstand, nur die Positionswinkel sind verschieden
STF16 7m7 8m8 5.8'' 40° 2019 Cas 00h16m41.65s +54°39'36.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White and blue-white, wide.
BU392 5m7 12m5 19.5'' 71° 2007 Cas 00h16m57.05s +61°31'59.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow A star. 12th mag B swims into view with averted vision and seeing, then can hold it direct as a bluish point.
STF22, 38 Psc AB-C 7m1 7m7 3.9'' 235° 2017 Psc 00h17m24.50s +08°52'34.80"
AB-D 7m1 11m5 66.8'' 151° 2005
Robert Zebahl
Leipzig (Germany)
70mm (44x) AB-C: At 44x separated with almost touching diffraction disks and small difference in brightness. At 57x clearly separated, but still quite close together. It stands in beautiful contrast to the nearby double star STF12 (35 Psc).
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB-C: near equal white pair, well split, B ~1/2 delta mag, PA to SW.
ES41 8m0 11m2 6.3'' 220° 2015 Cas 00h18m21.55s +49°30'35.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) B appeared while putting my eye to the eyepiece -- then disappeared. B needs averted vision to see -- can barely hold it direct vision. Wide, 4 delta mag.
STF24 7m8 8m4 5.1'' 247° 2017 And 00h18m30.59s +26°08'25.10"
Robert Zebahl
Leipzig (Germany)
70mm (66x) Well split with visible difference in brightness.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Near equal white ~5-6"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal brightness white star.
★★ STT5, 26 And 6m1 10m1 6.1'' 240° 2016 And 00h18m42.15s +43°47'28.10"
Rene Merting
Drachhausen (Germany)
100mm (64x) Komponente B erscheint bei 64x knapp westlich von A und ist nur knapp sichtbar - extrem großer Helligkeitsunterschied - schönes Doppel-Doppel zusammen mit HJ1947 nur 28' weiter westlich, beide Paare haben in etwa die gleichen Helligkeiten und den gleichen Abstand, nur die Positionswinkel sind verschieden
KR4, V377 Cas 8m2 9m4 2.2'' 180° 2015 Cas 00h19m14.30s +59°42'17.40"
Rene Merting
Drachhausen (Germany)
100mm (142x) bei 142x ist Komponente B nur in guten Momenten leicht abgesetzt südlich von A erkennbar - irgendwie habe ich mir den Doppelstern bei den Eckdaten leichter vorgestellt
S384 AB 7m0 10m3 104.0'' 22° 2015 And 00h20m00.41s +38°13'38.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Widely separated, yellow-white A, 2 delta-mag fainter B.
AC1 7m3 8m3 1.9'' 290° 2018 And 00h20m54.10s +32°58'40.90"

../images/binary-star-orbits/AC1-orbit.jpg

Robert Zebahl
Leipzig (Germany)
102mm (125x) Very attractive, relatively close with a clearly visible difference in brightness. In the immediate vicinity a brighter star shines in a lovely orange. Very nice contrast! ../projects/double-stars/robert-zebahl/sketches/2019-10-22_ac1.jpg
Uwe Pilz
Leipzig (Germany)
105mm (200x) orange. Leuchtend gelber Stern in 5' Abstand ../projects/double-stars/uwe-pilz/sketches/191122AC1.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Tight yellow-white pair, near equal magnitudes.
Mark McCarthy
Fremont (California/USA)
508mm (205x) Orange star, slightly out of round.
STF26 AB-C 7m5 9m9 13.8'' 114° 2015 Cep 00h21m22.17s +67°00'19.50"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein gut getrenntes Pärchen, aber trotzdem eine harte Nuss, weil die ost-südöstliche stehende Komponente C so schwach ist, dass sie nur mit viel Konzentration sichtbar wird bei dieser Vergrößerung - bei 64x dann ist das Erkennen von C leichter
STF27, 42 Psc 6m4 11m2 28.9'' 315° 2015 Psc 00h22m25.48s +13°28'56.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty, light orange star with a faint bluish B, widely separated.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange, with wide separation blue B, PA to NNW, ~3 delta mag.
STF28 AB 8m3 8m6 33.2'' 224° 2016 And 00h23m53.23s +29°30'09.10"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Near equal yellow A, white B, wide. A 3rd of similar magnitude in the field, could be part of the system? (it is FYM 12.)
FYM12 AC 8m3 8m9 145.9'' 137° 2016 And 00h23m53.23s +29°30'09.10"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Faint star, very widely separated from STF28 but in the same medium power field, forming a triple
STT9 AB 6m9 9m7 2.1'' 51° 2002 Cas 00h26m12.04s +56°46'45.20"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Very close, in diffraction, ~1.5". B is much fainter, ~3 delta mag, a pin prick resolved with seeing.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Interesting multiple system. Faint pairs on either side of a widely separated main pair, all in parallel PAs. (Quintuple. I saw AB through AE. C has a D pair which was not seen.)
STF30 AB 7m0 8m9 13.2'' 316° 2018 Cas 00h27m12.45s +49°59'08.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Obvious wide bright pair.
STT10 AB 6m5 10m2 114.2'' 240° 2015 Psc 00h27m31.02s +16°01'31.70"
AC 6m5 9m5 274.3'' 156° 2015
BD 10m2 14m3 152.8'' 156° 2015
Mark McCarthy
Fremont (California/USA)
317mm (553x) AC: White A with ~3 delta magnitude B, very wide separation.
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: B a very wide separation to W, 4 delta mag
HJ322, 12 Cet AB 5m9 10m2 12.0'' 202° 2015 Cet 00h30m02.35s -03°57'26.30"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Orange in finder. Bright orange A in scope, with very faint blue B, ~10" to south. Nice!
BU1095, 28 And AB 5m2 13m1 2.0'' 16° 2008 And 00h30m07.34s +29°45'06.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very bright yellow- white A. B is a very faint but consistent point resolved just beyond the first diffraction ring when seeing stills.
BU1094 AB 6m1 8m4 0.3'' 290° 2009 Cas 00h30m19.91s +59°58'39.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) No deformation noticed
BU394 AB 8m5 8m8 0.8'' 278° 2017 Cas 00h30m45.56s +47°31'47.50"

../images/binary-star-orbits/BU394-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Very fine, pop split with seeing, near equal.
STF33 8m8 8m9 2.8'' 213° 2017 And 00h30m58.47s +34°05'53.90"
Robert Zebahl
Leipzig (Germany)
70mm (128x) Components equally bright, easy to split.
HJ1981 A-BC 6m9 8m4 78.4'' 89° 2015 Cet 00h30m59.89s -10°05'04.90"
Mark McCarthy
Fremont (California/USA)
317mm (277x) White pair, PA to east, ~2 delta mag.
HJ5451 6m0 9m3 55.3'' 86° 2012 And 00h31m25.64s +33°34'53.90"
Uwe Pilz
Leipzig (Germany)
105mm (88x) gelbweiß, schon bei 21x erkennbar ../projects/double-stars/uwe-pilz/sketches/191122h5451.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange, pretty bright star, bluish / fainter widely separated B
STT12, lam Cas 5m3 5m6 0.2'' 210° 2010 Cas 00h31m46.32s +54°31'20.30"

../images/binary-star-orbits/STT12-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Lambda Cas: Maybe out of round? Marginal
BU1227 AB 7m2 10m6 2.8'' 193° 2015 Cas 00h32m21.78s +58°20'19.10"
AC 7m2 11m8 22.4'' 80° 2015
AD 7m2 11m7 30.9'' 112° 2015
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Yellow and 3 delta mag B, orange, comes into view direct vision but only with seeing, 2-3".
Mark McCarthy
Fremont (California/USA)
317mm (553x) AC: Faint star, 1 delta mag fainter than B, widely separated, PA 90 degrees from AD
Mark McCarthy
Fremont (California/USA)
317mm (553x) AD: Faint star, 1 delta mag fainter than B, more widely separated than C, at 90 degrees PA from C
STF36, 51 Psc AB 5m7 9m5 27.0'' 84° 2018 Psc 00h32m23.75s +06°57'19.60"
Mark McCarthy
Fremont (California/USA)
508mm (333x) 51 Psc. Bright white A and 3 detla mag B, wide
STF39 AB-C 7m1 8m7 20.1'' 45° 2018 Cet 00h34m29.79s -04°32'47.50"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Yellow and blue pair, PA to NE. Pretty.
STF40 AB 6m7 8m5 11.8'' 313° 2018 And 00h35m09.63s +36°49'56.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty yellowish star with fainter, widely separated B.
H5 17, pi And AB 4m4 7m1 35.8'' 174° 2018 And 00h36m52.84s +33°43'09.70"
Uwe Pilz
Leipzig (Germany)
105mm (88x) (HV 17) blauweiß und violett-grau ../projects/double-stars/uwe-pilz/sketches/191122HV17.jpg
STF45 AB 6m8 10m1 19.1'' 91° 2015 Cas 00h38m41.60s +46°57'24.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Easy wide orange and blue, 3 delta mag.
STT16 5m6 10m5 12.3'' 22° 2015 Cas 00h39m09.89s +49°21'16.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) wide and faint.
HJ1986 AB 8m0 8m5 40.3'' 67° 2018 Cep 00h39m35.16s +84°44'52.00"
AC 8m0 11m2 55.8'' 189° 2015
Rene Merting
Drachhausen (Germany)
100mm (32x) AB: bei 32x sehr weit getrenntes Pärchen - beide Komponenten ähnlich hell, Komponente A im SW weiß, B eine halbe Größenklasse schwächer und mehr gräulich - zurück auf 20x sind beide weiterhin weit getrennt erkennbar
Rene Merting
Drachhausen (Germany)
320mm (45x) AB: bei 45x sehr einfach - Komponente B im NO ist maximal eine halbe Größenklasse schwächer - Komponente A weißorange
AC: bei 45x zeigt sich C im Süden von A als ganz schwaches Lichtpünktchen - Abstand zu A etwas größer als der von AB - alle drei Sterne zusammen bilden ein flaches Dreieck, A ist die Spitze mit dem flachen Winkel
STF46, 55 Psc 5m6 8m5 6.6'' 195° 2015 Psc 00h39m55.57s +21°26'18.60"
Robert Zebahl
Leipzig (Germany)
70mm (44x) Clearly separated, but large difference in brightness. The companion appeared only as a tiny, faint star. The primary component sparkled in light orange.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange with wide separated blue B.
STF47 AB 7m2 8m8 16.6'' 205° 2015 And 00h40m19.78s +24°03'14.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Easy, a triple. Orange A star with 1.5 delta mag. B, 10". Third star another 1 delta mag, further out in a similar PA. Third star is BU 1348
BU1348 AC 7m2 11m1 46.5'' 233° 2015 And 00h40m19.78s +24°03'14.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) The third star out, paired with both A and B of STF 47 -- pretty weird orbit, trying to picture it
STF48 AB 7m8 8m1 5.5'' 334° 2016 Cas 00h42m40.01s +71°21'57.30"
Robert Zebahl
Leipzig (Germany)
70mm (57x) At 22x almost split, clearly elongated, notched. At 31x split, but very close together, almost equally bright. At 57x easily separable with very small difference in brightness. The fainter companion appeared slightly orange.
HJ1995 6m7 11m3 42.8'' 128° 2017 Cet 00h42m50.76s -09°55'17.90"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Fairly faint B, wide and just above averted vision threshold. PA to east.
STF55 8m3 8m9 2.3'' 331° 2016 And 00h44m22.95s +33°37'05.60"
Robert Zebahl
Leipzig (Germany)
70mm (128x) Well split with noticeable difference in brightness.
STFA1 AB 7m2 7m4 47.8'' 47° 2018 And 00h46m24.34s +30°56'33.50"
Robert Zebahl
Leipzig (Germany)
8x40 Large distance with visible difference in brightness. I used a tripod.
Uwe Pilz
Leipzig (Germany)
105mm (26x) zweiter Doppelstern im Bild (ohne Bezeichnung). Gelb und orange. ../projects/double-stars/uwe-pilz/sketches/190922STTI1.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) equal magnitude orange pair, wide.
H5 82 AB 8m0 8m3 56.8'' 75° 2018 Cas 00h47m24.62s +51°05'45.90"
Robert Zebahl
Leipzig (Germany)
70mm (26x) Almost equally bright components with large angular distance.
STF59 AB 7m2 8m1 2.4'' 151° 2018 Cas 00h47m59.03s +51°26'41.20"
Robert Zebahl
Leipzig (Germany)
70mm (100x) At 57x elongated, at 100x barely, at 128x clearly split with noticeable difference in brightness.
HO306 9m6 9m9 1.5'' 159° 2016 And 00h48m06.71s +25°32'54.30"
Robert Zebahl
Leipzig (Germany)
102mm (160x) Pretty faint and tight with visible difference in brightness.
★★★ eta Cas, 24 Cas STF60 AB 3m5 7m4 13.4'' 326° 2019 Cas 00h49m06.29s +57°48'54.70"
STF60 AC 3m5 11m4 225.0'' 260° 2000
STF60 AD 3m5 12m8 189.4'' 354° 2011
STF60 AE 3m5 10m2 75.6'' 126° 2015
STF60 AF 3m5 11m5 378.3'' 276° 2000
STF60 AG 3m5 9m5 419.7'' 259° 2012
STF60 AH 3m5 8m4 701.1'' 355° 2012
SMR2 AI 3m5 11m6 90.3'' 73° 2012
SMR2 AJ 3m5 12m3 237.1'' 262° 2012

../images/binary-star-orbits/STF60-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (57x) AB: Easy to split with big difference in brightness. Fainter component appeared deep orange to slightly red colored, brighter component tends to be more slightly yellowish.
Rene Merting
Drachhausen (Germany)
100mm (32x) AB: bei 32x ist Komponente A so hell, dass B trotz des augenscheinlich großen Abstandes von 13,38" nur knapp getrennt zu sehen ist - Komponente A ist gleißend hell-gelb, B dürfte mindestens 3 Größenklassen schwächer sein und wirkt dadurch dumpfer
Uwe Pilz
Leipzig (Germany)
105mm (53x) AB: leicht
Uwe Pilz
Leipzig (Germany)
105mm (288x) kein Sternentstehungsgebiet! ../projects/double-stars/uwe-pilz/sketches/etaCas.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Nice yellow pair. A is a red tainted yellow, B is cleaner.
Rene Merting
Drachhausen (Germany)
320mm (72x) AB: bei 72x ein echt fetter Farbkontrast, Komponente A ist gleißend hell und zitronengelb, B zeigt sich knallig orange - beide Sterne sind gut getrennt voneinander zu beobachten - sehenswert
STI1437 9m7 11m0 11.1'' 299° 2015 Cas 00h49m32.95s +55°33'54.40"
Mark McCarthy
Fremont (California/USA)
203mm (533x) Obvious pair, wide, ~15" or so, one delta mag [not physical]
65 Psc, STF61 6m3 6m3 4.3'' 116° 2018 Psc 00h49m52.88s +27°42'38.90"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Bright orange pair, 6-7"
BU232 AB 8m5 8m8 0.9'' 256° 2018 Cas 00h50m25.10s +50°37'49.60"
AB-C 8m5 10m1 24.5'' 300° 2018

../images/binary-star-orbits/BU232-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (533x) AB: Nice, well split, near equal. Part of a triple, the next one much wider in same PA and two delta mag. [AB-C is 10.06 24.5"]
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Neat near equal orange and yellow. Split with seeing, 1".
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB-C: C 2 delta mag fainter than B, about 25" separated, is the +1 star with BU232AB
MLR27 10m2 10m2 0.5'' 212° 2008 Cas 00h51m10.71s +60°18'54.20"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Split with seeing, tremulous in turbulence but does split when settled. Noticeable delta mag.
BU781 8m4 9m3 1.0'' 22° 2017 Cas 00h51m36.19s +68°59'14.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very fine faint pair, need to wait for seeing. 1", 1 delta mag.
A812 7m7 11m1 1.8'' 327° 2017 Cas 00h51m47.06s +48°03'23.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange star, suspect a brightening in diffraction when seeing stills, marginal.
STF65 8m0 8m0 3.2'' 220° 2017 Cas 00h52m45.61s +68°51'59.30"
Robert Zebahl
Leipzig (Germany)
70mm (57x) Clearly split with equally bright components.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Equal pair, white-yellow. Wide and pretty bright
★★ BU1 AB 8m6 9m3 1.5'' 83° 2016 Cas 00h52m49.22s +56°37'39.50"
AC 8m6 8m9 3.9'' 134° 2017
AD 8m6 9m7 9.0'' 194° 2017
AE 8m6 12m1 15.8'' 333° 2015
CD 8m9 9m7 7.8'' 220° 2016
Robert Zebahl
Leipzig (Germany)
70mm (57x) AC: Easy to split with little difference in brightness.
Robert Zebahl
Leipzig (Germany)
70mm (57x) AD: Relatively large angular distance with obviously fainter component.
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: In the finder there is a right triangle of equal stars, the foot star has a very faint, 2-3 delta mag star very close ~1", faint split. Some fainter stars wreathed about it. AC and AD appear to be the other triangle stars. 17 stars visible in the system, which I suppose ought to be called an open cluster
Mark McCarthy
Fremont (California/USA)
508mm (533x) AB: L shape asterism and the short end tip star has a faint close star, AB. There's a zigzag of four faint stars making an arc beyond this short L. Given this is really an open cluster this is not surprising. [not physical]
STI1460 9m2 12m9 9.6'' 92° 2015 Cas 00h52m55.81s +55°20'16.90"
Mark McCarthy
Fremont (California/USA)
508mm (533x) B is a faint star, pretty wide, unremarkable [not physical]
BU497 AB 4m8 9m8 146.0'' 170° 2015 Cas 00h53m04.28s +61°07'24.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Super wide and faint.
STF70 AB 6m3 9m5 8.1'' 247° 2015 Cas 00h53m47.53s +52°41'21.60"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Yellow-white A and widely separated B, a small point, 3 delta mag
HU1018 9m9 10m3 0.9'' 58° 2015 Cas 00h54m14.98s +51°08'12.00"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Excellent pair, near equal, ~1", very fine
A1258 9m7 9m9 0.6'' 202° 2018 Cas 00h54m23.37s +54°31'41.00"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Yes! I got it split, what a sight! Suspected at 533x. Reddish A, 1 delta mag brighter than blue B. Perfect star images. Nice color pair
STF72 8m4 9m3 23.3'' 173° 2015 And 00h54m37.50s +39°10'09.70"
Robert Zebahl
Leipzig (Germany)
152mm (22x) Easy with moderate difference in brightness. Both components appeared orange, the fainter one slightly more intense. The color was well visible at 69x.
HU802 7m8 10m0 0.4'' 222° 2008 Cas 00h54m53.84s +49°24'18.90"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Hairline split to overlapping, 1 delta mag, super fine
STF73, 36 And AB 6m1 6m5 1.1'' 334° 2018 And 00h54m58.02s +23°37'42.40"
Robert Zebahl
Leipzig (Germany)
102mm (125x) Clearly visible as figure '8' with a rather small difference in brightness.
Uwe Pilz
Leipzig (Germany)
105mm (198x) ganz einfach
Robert Zebahl
Leipzig (Germany)
152mm (300x) Split with little gap in between and little difference in brightness. Seeing was not really good.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) hell ../projects/double-stars/frederik-wanink/sketches/36And.jpg
BU1098, ups 1 Cas AB 5m0 12m5 18.0'' 63° 2015 Cas 00h55m00.19s +58°58'22.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright yellow and very much fainter 4 delta mag B
TDS1665 10m5 10m5 0.5'' 30° 2015 Cas 00h55m08.24s +57°13'30.80"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Can tell is double, elongated, and I got one split in ten seconds, seeing needs to be perfect
TDS1667 10m6 10m6 0.6'' 296° 2007 Cas 00h55m25.53s +59°50'59.90"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Pretty well split once it resolves out of the haze into two near equal points
ES405 10m2 10m4 4.4'' 117° 2016 Cas 00h55m41.89s +57°47'06.10"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Pretty, near equal white stars, wide separation
TDS1670 11m6 11m6 0.7'' 26° 2015 Cas 00h55m57.82s +58°32'38.90"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Rather wide, well split with seeing, bluish stars due to faintness. Very nice pair
ES940 AB 7m3 10m1 61.7'' 359° 2015 Cas 00h57m20.19s +52°14'23.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange A with very faint pin prick B, with seeing, 3 delta mag, wide.
HLD4 9m0 9m5 0.3'' 38° 2007 Cas 00h57m35.79s +54°23'44.80"

../images/binary-star-orbits/HLD4-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (533x) Yellowish stars, nicely split, a near equal. [this pair is widening, will get a little easier, was 1" at discovery in 1881 -- Holden, Lick director.]
S390 7m8 7m9 6.5'' 216° 2016 Cet 00h58m09.75s -15°40'58.00"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x eine schöne Erdnuss, sprich zwei gleichhelle Sterne, die nur in guten Momenten knapp getrennt erscheinen - die Trennung ist dann eindeutiger bei 64x
164 And, STF79 6m0 6m8 7.9'' 195° 2018 And 01h00m03.56s +44°42'47.70"
Robert Zebahl
Leipzig (Germany)
55mm (25x) Beautiful double star, relatively tight with visible difference in brightness.
ES45 6m6 10m8 7.9'' 244° 2015 Cas 01h01m27.04s +49°32'39.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange-yellow A, need averted vision to flash B out, barely hold with direct vision.
A2901 7m1 7m8 0.4'' 64° 2018 Cas 01h01m30.15s +69°21'30.70"

../images/binary-star-orbits/A2901-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (885x) Elongated to notched with seeing
BU396 6m1 8m6 1.3'' 67° 2007 Cas 01h03m37.01s +61°04'29.40"
Mark McCarthy
Fremont (California/USA)
317mm (340x) Bright white and 3-4 delta mag blue, ~2", well split.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Suspected in 277x, confirmed split with 553x, Small much fainter blue B in A's diffraction -- yellow-white, ~1", ~3 delta mag.
STF84, 26 Cet AB 6m1 9m5 16.0'' 253° 2015 Cet 01h03m49.02s +01°22'00.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow A and bluish B. PA west, 2 delta mag. Wide separation.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pale yellow and almost dark purple B, 2 delta mag, ~15"
★★ STF88, psi 1 Psc AB 5m3 5m5 29.2'' 160° 2018 Psc 01h05m40.93s +21°28'23.60"
Rene Merting
Drachhausen (Germany)
10x50 ein etwas mehr als knapp getrenntes Pärchen zweier gleichheller Sterne
Rene Merting
Drachhausen (Germany)
16x70 ein ordentlich getrenntes helles Sternpaar, die südliche B-Komponente wirkt etwas weniger weiß - schöner Anblick
Christopher Hay
Seeheim (Germany)
18x80 Psi1 Psc is well separated. Very strong visual presence in this instrument. Components almost identically bright, colourless. Strongly supplemented to the south in 4° field of view by Psi2, Psi3 and Chi. Field relatively empty to the north, which gives the field further tension. According to Stelledoppie a true physical double 275 light years distant.
STF90, 77 Psc AB 6m4 7m3 32.7'' 84° 2018 Psc 01h05m49.22s +04°54'31.20"
Christopher Hay
Seeheim (Germany)
15x45 Widely split. Very reminiscent in PA and delta-Mag of the pair Zeta Psc (STF100) 3° to the north, but is wider, weaker and thus overall more pleasant in this instrument.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very easy white-yellow pair, ~0.5 delta mag, wide PA to the east.
S393, sig 2 Psc AB 6m4 10m6 60.0'' 295° 2014 Psc 01h06m11.20s +32°10'53.30"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Orange-yellow A, 2 delta mag very wide B
STTA11 AB-C 7m6 8m8 59.3'' 164° 2014 And 01h07m09.16s +38°39'01.70"
Robert Zebahl
Leipzig (Germany)
152mm (22x) Pretty wide pair with moderate difference in brightness. At 69x the primary component appeared slightly orange, BC rather greyish.
STF91 7m4 8m6 4.3'' 315° 2018 Cet 01h07m10.99s -01°43'55.60"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Well separated 1.5 delta mag, white stars
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange-yellow pair, ~2 delta mag, ~4", PA to N.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pale yellow and pale orange pair, wide separation, PA to the WNW.
BAR1, bet And AC 2m2 13m0 108.4'' 276° 2015 And 01h09m43.92s +35°37'14.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) EE Barnard recorded eight faint stars, ranging from 10.7 to 14.4 mangnitude, surrounding Beta Andromadae. As a bonus, galaxy NGC 404 "Mirach's Ghost" is in the same near area. I found seven using magnifications of 201x to 553x, moving Beta in and out of the field.
BU235 Aa-Ab 7m5 7m8 0.8'' 143° 2018 Cas 01h10m34.31s +51°00'47.80"

../images/binary-star-orbits/BU235-Aa-Ab-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) Mehrfachsystem ../projects/double-stars/frederik-wanink/sketches/BU235.jpg
HJ634 7m3 12m7 56.3'' 236° 2015 Psc 01h10m54.28s +09°33'50.00"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Yellow-orange with faint wide B to west, ~3 delta magnitude.
STT553, the Cas AB 4m3 11m3 126.4'' 143° 2012 Cas 01h11m06.16s +55°08'59.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Super wide and faint.
HO215, 45 And 6m6 6m6 0.1'' 225° 2006 And 01h11m10.29s +37°43'26.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 45 And: Disk seems not round but far for me to claim it, marginal observation
STF96 7m9 8m9 0.9'' 287° 2018 Cas 01h12m41.24s +65°00'32.90"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) scheint enger als 0,9" ../projects/double-stars/frederik-wanink/sketches/STF96.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Mostly notched but moments of hairline split with seeing 1.5 delta mag. Very tough! Yellow-orange stars.
STF98 AB 7m0 8m1 20.0'' 250° 2018 Psc 01h12m52.98s +32°04'31.70"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Easy to separate at 22x, clear difference in brightness at moderate distance. In terms of color, the two components appeared slightly different. At 44x A appeared white-yellowish, B slightly reddish.
Uwe Pilz
Leipzig (Germany)
105mm (288x) nicht einfach
Mark McCarthy
Fremont (California/USA)
317mm (277x) Yellow-orange and 1 delta mag B. Could be a multiple system: some stars on other side of A making a triangle, 2-3 times fainter. (4 stars in system).
Mark McCarthy
Fremont (California/USA)
317mm (553x) 1 delta mag, wide separation. White A, blue B.
STT26 AB 6m3 10m5 10.7'' 258° 2015 Psc 01h12m59.47s +30°03'51.20"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Orange with much fainter B ~10" to south.
BU258 AB 6m5 8m8 1.6'' 263° 2015 Cas 01h13m09.82s +61°42'22.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Barely split at 340x, a brightening in the first diffraction. Wanted more certainty so went to 553x, clean split, 2" 3 detla mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) White pair, B resolves with seeing, ~2", 2-3 delta mag.
zeta Psc, 86 Psc, STF100 AB 5m2 6m3 23.2'' 63° 2018 Psc 01h13m43.80s +07°34'31.80"
Christopher Hay
Seeheim (Germany)
15x45 Cleanly split. Western component distinctly brighter, no colour impression.
Robert Zebahl
Leipzig (Germany)
200mm (37x) Visually evident as double star and easy to find. Well split with slight difference in brightness.
HJ636 7m4 11m8 20.5'' 288° 2014 Psc 01h14m20.83s +30°32'31.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint B ~20" out but not difficult. ~4 delta mag.
STFA3, 37 Cet AB 5m2 7m8 47.1'' 331° 2018 Cet 01h14m24.04s -07°55'22.20"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein weit auseinander stehender Doppelstern mit einem schönen Farbkontrast, Komponente A im SO ist weisgelblich, die gut 2 Magnituden schwächere Komponente B ist eher schmutzig grauorange
Mark McCarthy
Fremont (California/USA)
317mm (553x) 37 Cet: Both orange, B 3 delta mag, so more intense orange. Wide separation PA to the north.
STF104 8m0 9m8 13.4'' 323° 2015 And 01h16m57.09s +38°27'38.70"
Robert Zebahl
Leipzig (Germany)
152mm (69x) Easy, rather close pair, but with a clear difference in brightness. Primary component appeared slightly orange, companion slightly grey-blueish.
STF108 6m5 9m6 6.4'' 62° 2017 And 01h18m47.00s +37°23'10.60"
Robert Zebahl
Leipzig (Germany)
120mm (75x) Easily split with big difference in brightness.
Robert Zebahl
Leipzig (Germany)
152mm (69x) Easy and pretty uneven. Primary component appeared slightly yellowish.
STF105 AB 8m8 9m8 3.0'' 185° 2016 Cas 01h18m57.50s +66°09'28.00"
Robert Zebahl
Leipzig (Germany)
70mm (100x) Clearly split with visible difference in brightness.
KR11 9m6 9m7 2.0'' 59° 2017 Cas 01h19m40.95s +61°34'44.40"
Robert Zebahl
Leipzig (Germany)
152mm (129x) Rather faint double star. Easily split with equally bright components.
STF113, 42 Cet A-BC 6m5 7m0 1.6'' 22° 2018 Cet 01h19m48.30s -00°30'32.50"

../images/binary-star-orbits/STF113-A-BC-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Pale orange and slight blue, PA to NW, ~1 delta mag. 2". Pretty.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Gold and blue, pretty. 2" PA to north.
phi Cas, 34 Cas, H 3 23 AB 5m1 12m3 48.4'' 209° 2015 Cas 01h20m04.91s +58°13'53.80"
AC 5m1 7m0 132.8'' 235° 2014
AD 5m1 10m3 179.0'' 288° 2015
AE 5m1 10m4 170.4'' 239° 2015
Uwe Pilz
Leipzig (Germany)
105mm (288x) AB: kein Dreifachstern erkennbar, obwohl so ausgewiesen
S397, 35 Cas AB 6m3 8m6 57.4'' 342° 2018 Cas 01h21m05.27s +64°39'29.30"
Rene Merting
Drachhausen (Germany)
16x70 ein weit getrenntes Pärchen mit einem schönen Farbkontrast - Komponente A im Süden wirkt blau-weiß, B ist gut 1.5 Größenklassen schwächer und wirkt gräulich
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein schönes helles Sternpaar, weit getrennt - auffälliger Farbkontrast, A ist reinweiß, B eher schmutzig orange-braun - zurück auf 20x ist die Trennung noch immer sehr deutlich
STF115 AB 7m1 7m3 0.5'' 160° 2018 Cas 01h23m21.27s +58°08'35.60"

../images/binary-star-orbits/STF115-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Peanut, near equal. in nearly the same FOV with Detla Cas, V 465 pretty orange star, and NGC 457, a loose moderately rich open cluster
ES1712 AB 7m9 9m3 47.2'' 2015 Cas 01h24m20.10s +58°56'47.20"
Rene Merting
Drachhausen (Germany)
16x70 ein gut isolierter Doppelstern, da kaum weitere Sterne im unmittelbaren Umfeld zu erkennen sind - Komponente B ist schwach und steht weit getrennt im Norden von A - leicht, aber nicht sehr reizvoll für Ferngläser
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein weit getrenntes Pärchen, aber der schöne Farbkontrast entschädigt - Komponente A im Süden ist weiß und doppelt so hell wie Komponente B, die leicht bräunlich erscheint - zurück auf 20x ist der Doppelstern noch immer weit getrennt und einfach sichtbar
STTA17, BKO10 STTA17 AB 8m0 9m8 35.4'' 101° 2015 And 01h24m30.85s +39°01'30.30"
STTA17 AC 8m0 8m5 134.9'' 347° 2014
STTA17 CD 8m5 9m8 68.9'' 279° 2015
STTA17 CE 8m5 13m3 81.2'' 14° 2015
BKO10 AF 8m0 11m2 141.7'' 270° 2015
Christopher Hay
Seeheim (Germany)
18x80 The group of stars strikes the eye while sweeping from Mirach to Tau/Upsilon TRI. First thought I'd found an open cluster. Two pairs with practically opposite PAs. Southern pair AB much closer than northern CD, but brightnesses within the pairs very similar. A nice double-double.
Robert Zebahl
Leipzig (Germany)
152mm (22x) The components A-D and F easily visible as a rather conspicuous group with comparatively large distances. I didn't pay attention to the component E. No brighter stars in the immediate vicinity. The pair AB and CD are very similar; CD a bit wider with opposite position angle. Very nice multiple star also for smaller telescopes.
H5 83, psi Cas AC 4m7 9m2 20.3'' 128° 2007 Cas 01h25m55.90s +68°07'47.80"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x zeigt sich A wunderschön buttergelb, C mit ordentlich Abstand im SO ist ganz schwach und leicht bräunlich - Helligkeitsunterschied mindestens 4 Größenklassen - ein sehr ungleiches Paar
STF122 6m7 9m5 5.7'' 329° 2013 Psc 01h26m53.55s +03°32'08.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) pretty white and orange, PA to N, ~3 delta mag, 6-8"
AC14 8m3 8m9 0.7'' 93° 2018 And 01h28m19.28s +42°46'56.00"
Robert Zebahl
Leipzig (Germany)
152mm (300x) Immediately visible as a double star, almost separated with little difference in brightness.
S398 AB 6m3 8m0 68.9'' 100° 2018 Psc 01h28m22.92s +07°57'40.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) orange with 1 delta mag white to east.
ES4 8m1 9m1 2.8'' 101° 2016 And 01h31m05.02s +43°37'14.60"
Robert Zebahl
Leipzig (Germany)
70mm (128x) Not split. I probably didn't recognised the fainter component. The angular distance shouldn't be a problem.
Mark McCarthy
Fremont (California/USA)
508mm (333x) Split with 333x, ~1.5" 2 delta mag.
STF128 8m1 10m4 11.4'' 310° 2015 Cas 01h31m41.16s +61°02'34.30"
Rene Merting
Drachhausen (Germany)
100mm (64x) erst bei 64x offenbarte sich mir der Begleiter, das lag nicht am Abstand, sondern an der Schwäche von Komponente B - bei dieser Vergrößerung sind beide Sterne nämlich schon ordentlich getrennt - Komponente B im NW ist 2 bis 2.5 Größenklassen schwächer
Uwe Pilz
Leipzig (Germany)
105mm (288x) einfach
STT31 6m5 10m6 4.0'' 78° 1991 Psc 01h33m18.28s +08°12'31.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange with very faint glow, AV only, to east. ~4-5", 3 delta mag.
STF136, 100 Psc AB 7m3 8m3 15.7'' 77° 2016 Psc 01h34m51.61s +12°33'31.20"
AC 7m3 13m6 76.9'' 312° 2015
AD 7m3 11m6 124.5'' 2015
Robert Zebahl
Leipzig (Germany)
70mm (22x) AB: At 22x easy to separate with well visible difference in brightness. A difference in color is visible, but the assignment of colors was difficult. At 44x A appeared slightly orange, B rather blueish.
STF138 AB 7m5 7m6 1.7'' 60° 2018 Psc 01h36m02.86s +07°38'42.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Tight near equal pair, yellow-white, 2" or so.
STT33 AB 7m3 9m0 26.9'' 77° 2015 Cas 01h37m22.87s +58°38'14.70"
Rene Merting
Drachhausen (Germany)
16x70 ein isoliert stehendes gut getrenntes Pärchen mit schönem Farbkontrast - Komponente B im Osten wirkt rot-braun, weil die weiße Komponente A gut 1.5 Größenklassen heller ist
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x stehen beide Komponenten weit auseinander - Komponente B im Osten ist gut 1.5 Größenklassen schwächer als A - Farbkontrast rein weiß (A) vs. orange-braun (B) - südöstlich von A in 4-facher Entfernung AB steht ein weiterer schwacher Stern (Komponente C mit 10.29 mag/ AC mit eigener Bezeichnung: DOB 2) - zurück auf 20x bilden A und B ein schönes enges Paar, Komponente C ist auch noch knapp erkennbar
Mark McCarthy
Fremont (California/USA)
317mm (340x) Pretty yellow-white and red-orange pair, wide, 1.5-2 delta mag. Nearby X Cas a very pretty red.
DOB2 AC 7m3 10m3 107.0'' 109° 2015 Cas 01h37m22.87s +58°38'14.70"
Rene Merting
Drachhausen (Germany)
100mm (32x) Komponente C als Anhängsel von STT33 - Komponente C ist bei 32x sehr weit südöstlich von A erkennbar, vierfacher Abstand AB (STT33) - zurück auf 20x sind alle drei Komponenten ebenfalls noch zu erkennen
STF141 8m3 8m6 1.7'' 303° 2018 And 01h40m03.42s +38°58'10.70"
Robert Zebahl
Leipzig (Germany)
102mm (125x) Clearly separated, but still very close. Slightly uneven.
HJ1088 AB 6m3 9m8 19.5'' 168° 2015 Cas 01h42m17.70s +58°37'39.80"
Rene Merting
Drachhausen (Germany)
100mm (32x) erst bei 32x zeigt sich der schwache Begleiter weit getrennt südlich von A - Größenklassenunterschied enorm bzw. nicht abschätzbar - Komponente A ist weiß mit einem Stich ins Gelbe (ich kann mich aber auch täuschen), B hat keine Farbe, wohl zu schwach auf der Brust - ein Doppelstern für Puristen
BU1103, 44 Cas AB 5m8 12m1 1.6'' 2005 Cas 01h43m19.75s +60°33'04.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 44 Cas. Extremely fine, extremely faint spec consistently in one spot in the diffraction, 1", when seeing perfects. Need a slight averted vision to see it.
STF150 7m7 8m2 35.7'' 196° 2015 Cet 01h43m22.43s -07°04'37.30"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x zeigen zwei ordentlich getrennte annähernd gleichhelle Sterne, Komponente A im Norden ist vielleicht eine halbe Größenklasse heller - leichter Farbkontrast, A weiß, B grauweiß
STF155 AB 7m9 8m0 4.9'' 325° 2018 Psc 01h44m15.19s +09°29'02.70"
Robert Zebahl
Leipzig (Germany)
70mm (44x) Lovely embedded in a small group of stars. The components showed a small difference in brightness and were very close together. ../projects/double-stars/robert-zebahl/sketches/2019-10-24_stf155.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice near equal brightness white pair, ~5"
ARN55, V773 Cas AD 6m3 9m9 160.5'' 45° 2003 Cas 01h44m17.96s +57°32'11.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very wide separation 1 delta mag. physical double. This is the AD pair of a more complicated system. AB = V773 Cas = BU 870 which is 6.29/8.68 0.3", AC = GUI 2, 6.29/16.00 16.8".
Mark McCarthy
Fremont (California/USA)
317mm (553x) Picking up a pinpoint in A's diffraction, very faint with seeing, <1", 3-4 delta mag, white. Marginal.
STF149 8m2 9m3 1.4'' 81° 2018 And 01h44m30.83s +39°57'31.10"
Robert Zebahl
Leipzig (Germany)
102mm (160x) At 125x almost split, noticeably uneven. At 160x split, but pretty tight.
STF151 10m6 11m0 7.2'' 39° 2016 Cas 01h45m59.32s +61°12'45.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Equal, fairly faint but by no means the faintest in a very rich field. Visible in 80mm finder.
STF152 9m0 11m2 9.4'' 106° 2015 Cas 01h46m04.90s +61°13'41.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) A about 11th mag and B wide separation 1.5 delta mag. not physical
STF153 9m4 10m4 7.7'' 69° 2015 Cas 01h46m34.53s +61°15'45.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Well separated ~10", 1 delta mag pair
STF158 AB 9m0 9m4 2.2'' 272° 2018 Tri 01h46m44.07s +33°09'45.50"

../images/binary-star-orbits/STF158-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (205x) Nice split, pretty wide considering low magnification. Orange-yellow stars about half delta mag
STF162 AB 6m5 7m2 2.0'' 199° 2018 Per 01h49m15.47s +47°53'47.10"
AC 6m5 9m2 20.3'' 178° 2018
AD 6m5 10m0 138.7'' 96° 2007
BC 7m2 9m2 19.2'' 177° 2018
Rene Merting
Drachhausen (Germany)
16x70 AC: ein schwieriges Paar aufgrund des Helligkeitsunterschiedes - mit etwas Geduld offenbart sich Komponente C knapp südlich von A sehr dicht an dessen hellem Glanz - die Trennung ist nur in ruhigen Momenten kurzzeitig sichtbar
Robert Zebahl
Leipzig (Germany)
70mm (100x) AB: At 100x partly split, otherwise '8'-shaped. At 128x clearly split. Difference in brightness noticeable.
BU1016 9m9 10m1 0.7'' 43° 2015 Tri 01h49m46.70s +33°03'57.90"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Suspect elongation, seeing not supporting higher magnification
1 Ari, STF174 6m3 7m2 2.9'' 165° 2018 Ari 01h50m08.60s +22°16'29.50"
Robert Zebahl
Leipzig (Germany)
63mm (46x) Clearly split, but tight with noticeable difference in brightness.
Robert Zebahl
Leipzig (Germany)
70mm (80x) At 67x pretty tight pair, but separated with a clear difference in brightness. The primary component appeared in a hint of orange. At 80x easy to separate.
Stefan Loibl
Rosenheim (Germany)
102mm (102x) slight color difference, A orange, B blueish
Sarah Gebauer
Germany
150mm (27x) im Dezember 2019 nicht getrennt ../projects/double-stars/sarah-gebauer/sketches/20191230%201%20Ari%20DSk.jpg
Robert Zebahl
Leipzig (Germany)
200mm (100x) Conditions in the target region: SQM-L 20.8
Nice double star with big difference in brightness.
Mark McCarthy
Fremont (California/USA)
203mm (533x) 1 Ari. ! Very beautiful yellow-orange A and robin's egg blue B, 3", one delta mag. probably one of the best color pairs
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty orange and blue pair, ~2 delta mag, ~2".
STF175 AB 9m0 9m4 28.6'' 2018 Ari 01h51m01.96s +21°06'56.10"
Mark McCarthy
Fremont (California/USA)
317mm (340x) Near equal white, fairly wide separation
HO311 8m2 7m8 0.4'' 178° 2018 Ari 01h51m13.34s +24°39'08.00"

../images/binary-star-orbits/HO311-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (1067x) Nice clear split with seeing, more near equal but there is a noticeable magnitude difference, white stars
STF163 AB 6m8 9m1 34.5'' 38° 2018 Cas 01h51m16.93s +64°51'17.90"
Rene Merting
Drachhausen (Germany)
16x70 ein ordentlich getrenntes Pärchen - Komponente A im SW strahlt gelblich, B im NO ist schwach erkennbar, aber nicht schwer
Robert Zebahl
Leipzig (Germany)
70mm (20x) Easily split at 20x. From 44x the brighter component was orange colored, the fainter one tends to be more bluish.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty orange star in the 80mm finder. Wide separated blue B, 2 delta mag.
STF178 8m2 8m2 3.0'' 205° 2018 Ari 01h52m02.54s +10°48'38.10"
Robert Zebahl
Leipzig (Germany)
63mm (67x) Clearly split, tight, apparently equally bright components.
Robert Zebahl
Leipzig (Germany)
70mm (100x) Split with equally bright components.
J671 11m6 11m8 2.7'' 153° 2016 Ari 01h52m58.18s +21°52'13.10"
Mark McCarthy
Fremont (California/USA)
508mm (533x) B star is faint but not difficult, ~3", very nice
STF179 7m6 8m1 3.5'' 160° 2018 And 01h53m10.72s +37°19'16.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal magnitude, 4", nice orange-yellow color.
BU260 8m8 9m0 1.1'' 261° 2018 Ari 01h53m14.21s +15°26'00.30"

../images/binary-star-orbits/BU260-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (533x) Fine pair, well split, half delta mag
gamma Ari, STF180 AB 4m5 4m6 7.4'' 2018 Ari 01h53m31.76s +19°17'38.60"
Stefan Loibl
Rosenheim (Germany)
102mm (41x) easily split at 41x, no color difference, nice view with 8m star HD11557 in the same FOV
Robert Zebahl
Leipzig (Germany)
200mm (80x) Nice, obvious double star. Both components have similar brightness and appeared white.
Mark McCarthy
Fremont (California/USA)
203mm (533x) Gamma Arietis = Mesarthim: Perfectly equal pair, wide, very white
Mark McCarthy
Fremont (California/USA)
317mm (277x) Gamma Ari. Equal yellow-white, wide, bright.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Gamma Aries. Nice near equal magnitude pair, white, ~4".
COU352 11m0 11m6 1.0'' 21° 2015 Ari 01h54m23.02s +17°53'43.80"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Faint pair, smeared, elongated and resolves with seeing and averted vision
HEI433 10m8 11m6 3.6'' 192° 2015 Ari 01h54m28.42s +17°37'49.70"
Mark McCarthy
Fremont (California/USA)
508mm (533x) 11th mag B star easier since wider separation, faint, half delta mag, wide pair
HEI208 11m4 11m8 1.4'' 180° 2015 Ari 01h54m37.99s +14°05'34.20"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Very faint, need to wait for seeing, splits with seeing and a little averted vision, ~1.5", half delta mag
A2323 9m5 10m9 1.7'' 146° 2017 Ari 01h54m45.56s +17°28'01.40"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Fine pair, easily seen B, not difficult since wider separation. ~1.5", 1.5 delta mag
STF170 7m5 8m2 3.2'' 244° 2016 Cas 01h55m27.35s +76°13'28.40"
Robert Zebahl
Leipzig (Germany)
70mm (57x) At 57x barely split with noticeable difference in brightness. At 128x easy split.
COU453 10m4 10m8 0.7'' 282° 2016 Ari 01h56m19.96s +25°20'24.00"
Mark McCarthy
Fremont (California/USA)
508mm (533x) I get clean split, the B star is very faint and just within A's diffraction ring, but it's there. Great!
STF182 AB 8m3 8m3 3.6'' 125° 2016 Cas 01h56m23.56s +61°16'52.00"
Robert Zebahl
Leipzig (Germany)
70mm (57x) At 44x almost split. At 57x equally bright components visible.
STF189 9m9 11m0 9.0'' 269° 2014 Ari 01h57m09.47s +18°57'32.20"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Orange and blue stars, wide, surprised these are nice hard points
A1920 9m5 10m1 1.8'' 236° 2018 Tri 01h57m52.62s +33°10'19.60"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Nice clean split, very pretty white stars, seems a bit more than half delta mag
H5 12, 9 Ari, lambda Ari AB 4m8 6m7 37.3'' 48° 2018 Ari 01h57m55.71s +23°35'45.80"
Robert Zebahl
Leipzig (Germany)
70mm (15x) Easy to split with large distance and difference in brightness.
Stefan Loibl
Rosenheim (Germany)
102mm (41x) easily split, both components white, no color difference
Uwe Pilz
Leipzig (Germany)
105mm (200x) der helle Stern ist blauweiß ../projects/double-stars/uwe-pilz/sketches/191025_LamAri.jpg
S404 AB 7m6 9m7 29.2'' 84° 2015 And 01h58m04.61s +41°23'09.50"
Rene Merting
Drachhausen (Germany)
16x70 der Doppelstern liegt südwestlich einer auffälligen Sternkette, die sich von SO nach NW zieht - mit etwas Geduld ist Komponente B knapp östlich von A zu erkennen - A ist nicht die hellste Leuchte, B noch deutlich schwächer
FRK3 6m7 9m7 44.3'' 224° 2015 Cas 01h58m18.54s +59°37'33.40"
Rene Merting
Drachhausen (Germany)
16x70 ein ungleiches Paar - Komponente B steht gut getrennt südwestlich und ist mehr als 2 Größenklassen schwächer und wirkt dadurch grau-braun im Vergleich zu A
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x schon weit auseinander - Komponente A ist schneeweiß, die viel schwächere Komponente B im SW eher braungrau - zurück auf 20x zeigt sich ein immer noch ordentlich getrenntes Pärchen, der Farbkontrast ist jetzt nicht mehr ganz so auffallend
AG28 9m8 10m8 3.2'' 175° 2015 Tri 01h58m25.93s +31°55'42.70"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Fine pair, well split, one delta mag white-blue stars
STF194 7m6 9m5 1.3'' 279° 2018 Ari 01h59m18.95s +24°49'44.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Fairly faint 1.5" near equal magnitude, maybe 1/2 delta mag. Slightly orange, pretty.
Mark McCarthy
Fremont (California/USA)
508mm (533x) Lovely white pair, near equal, well separated, ~3"
STF200 9m6 10m3 8.1'' 124° 2018 Ari 02h01m36.23s +24°05'22.30"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Wide separated white pair, more than one delta mag
BU513, 48 Cas AB 4m7 6m7 0.6'' 320° 2013 Cas 02h01m57.55s +70°54'25.40"

../images/binary-star-orbits/BU513-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Searched around the swollen, shimmering bright A star disk and felt there was a faint close B trying to resolve in the first diffraction at 553x. Apodizing mask cleaned up the image but no B resolved
alpha Psc, 113 Psc, Alrischa, Kaitain, Okda STF202 AB 4m1 5m2 1.8'' 262° 2017 Psc 02h02m02.80s +02°45'49.40"
PWL1 AC 4m1 8m2 404.9'' 63° 2006
PWL1 AD 4m1 8m6 434.5'' 335° 2006

../images/binary-star-orbits/STF202-AB-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (88x) AB: der hellere Stern ist weiß ../projects/double-stars/uwe-pilz/sketches/191129alpPsc.jpg
STF201, eps Tri 5m5 11m4 4.2'' 119° 1990 Tri 02h02m57.97s +33°17'02.90"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Epsilon Tri. Very nice! Bright A star is a white blaze, and outside of its glow is very small point of the B star, very fine. Very nice indeed
STF208, 10 Ari AB 5m8 7m9 1.3'' 349° 2018 Ari 02h03m39.26s +25°56'07.60"

../images/binary-star-orbits/STF208-AB-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (200x) helle Stelle im ersten Ring ../projects/double-stars/uwe-pilz/sketches/10Ari.jpg
Mark McCarthy
Fremont (California/USA)
203mm (533x) 10 Ari Pretty white and slightly off-white or blue-white B, 2.5 delta mag, ~1.5"
Mark McCarthy
Fremont (California/USA)
317mm (553x) ~2 delta mag, ~1" very nice. ~1 disk split. Nice!
STF205, gamma And, 57 And, Alamak A-BC 2m3 5m0 9.4'' 63° 2016 And 02h03m53.92s +42°19'47.50"
Robert Zebahl
Leipzig (Germany)
63mm (42x) Easy to split with quite large difference in brightness.
Uwe Pilz
Leipzig (Germany)
105mm (52x) einfach
Robert Zebahl
Leipzig (Germany)
152mm (100x) Very easy. A: orange, BC: rather white.
Rene Merting
Drachhausen (Germany)
320mm (45x) bei 45x ein knapp getrenntes Pärchen - Komponente A knallgelb mit einem Anhängsel nordöstlich - Komponente BC strahlt 3 Größenklassen schwächer - bei 144x wirkt BC grün-weiß, bei 45x war der Eindruck noch leicht gelblich
STF212 8m3 8m7 1.9'' 162° 2018 Ari 02h06m14.96s +25°06'31.00"
Robert Zebahl
Leipzig (Germany)
63mm (168x) Not split, but partially seen as an '8'. Overall the double star appeared rather faint and both components seemed to be similarly bright.
Robert Zebahl
Leipzig (Germany)
70mm (128x) Barely split with slight difference in brightness.
Mark McCarthy
Fremont (California/USA)
317mm (170x) A star is deformed shaped, could be very close near equal pair but seeing is poor and cannot resolve
TDS2117 10m8 11m0 2.1'' 14° 2015 Ari 02h06m24.51s +21°41'56.00"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Fine near equal white pair, well separated to wide
HO312, 11 Ari 6m0 11m5 1.7'' 340° 2004 Ari 02h06m49.22s +25°42'16.50"
Mark McCarthy
Fremont (California/USA)
508mm (533x) 11 Ari Used apodizing screen to tone A down. B is bluish & resolves out on the edge of A's diffraction with seeing and is very, very faint compared to A
STF221 AB 8m1 9m4 8.5'' 145° 2015 Ari 02h09m42.76s +20°20'53.30"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Orange and blue pair, 2 delta mag., ~8" Pretty.
STF219 8m0 8m9 11.7'' 186° 2015 Tri 02h10m16.10s +33°21'55.20"
Robert Zebahl
Leipzig (Germany)
55mm (25x) Well separated with noticeable difference in brightness.
Mark McCarthy
Fremont (California/USA)
203mm (205x) Pretty white, bright A star and wide B, three delta mag
COU1068 10m7 11m2 1.1'' 246° 2015 Tri 02h10m18.35s +35°10'24.10"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Seeing isn't what it needs to be. Suspected elongation at 205x, 333x elongated it more but did not split, the star images are too hairy
STI1797 7m5 11m8 8.6'' 142° 2015 Per 02h10m24.05s +56°17'49.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty orange and blue stars, 2-3 delta mag, well separated 10"
STF224 8m3 8m9 6.0'' 244° 2016 Ari 02h10m52.01s +13°41'00.40"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Near equal brightness white pair, ~10", nice split.
59 And, STF222 6m0 6m7 16.5'' 36° 2018 And 02h10m52.83s +39°02'22.40"
Robert Zebahl
Leipzig (Germany)
8x40 Separated, but very tight. I used a tripod.
Rene Merting
Drachhausen (Germany)
16x70 ein sehr dichtes Sternpaar, ganz knapp getrennt sichtbar - Komponente B im NO ist eine halbe Größenklasse schwächer - leichter Farbunterschied und das Phänomen, dass der Farbkontrast zwischen beiden Sternen immer hin und her springt - ich kann nicht genau sagen, welcher Stern das kühlere oder wärmere Weiß hat
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein auffälliges Sternpaar - gut getrennt mit leichtem Farbkontrast, Komponente A im SW ist weiß, die Komponente B zwar auch, aber mit einem Stich ins orange, eigenartig - Helligkeitsunterschied eine halbe Magnitude
Robert Zebahl
Leipzig (Germany)
120mm (18x) Well split with noticeable difference in brightness.
Robert Zebahl
Leipzig (Germany)
200mm (100x) Conditions in the target region: SQM-L 20.4
Nice and evident double star, easy to split. About 12 arcminutes NE there is NGC828 (v12.3m),
STF226 AB 8m0 9m6 1.8'' 231° 2017 Ari 02h12m15.40s +23°57'29.50"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Near equal mag. orange, but split is lost in poor seeing, appears oval with 170x., it appears as two lobes awash in diffraction at 277x
★★★ STF227, iota Tri, 6 Tri 5m3 6m7 3.7'' 69° 2016 Tri 02h12m22.28s +30°18'11.10"
Robert Zebahl
Leipzig (Germany)
70mm (57x) At 44x even separable with a clear difference in brightness, whereby the companion is almost outshone by the primary component. At 57x easy to separate. Primary component shines in bright orange, companion slightly orange. Beautiful sight together with STF232 in one field of view! ../projects/double-stars/robert-zebahl/sketches/2019-12-12_6_tri_stf232.jpg
Uwe Pilz
Leipzig (Germany)
105mm (88x) weiß und blau ../projects/double-stars/uwe-pilz/sketches/191230stf227.jpg
Mark McCarthy
Fremont (California/USA)
203mm (205x) 6 Tri. Yellow A, white b, pretty. Wide, about two delta mag
Frederik Wanink
Itterbeck (Germany)
254mm (200x) Helligkeitsunterschied deutlich
★★★ STF231, 66 Cet AB 5m7 7m7 16.8'' 235° 2018 Cet 02h12m47.54s -02°23'37.10"
Uwe Pilz
Leipzig (Germany)
105mm (88x) weiß und leuchtend rot! ../projects/double-stars/uwe-pilz/sketches/191129_66Cet.jpg
S405 AB 6m5 7m2 55.5'' 277° 2018 Cep 02h12m49.98s +79°41'29.30"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 20x weit auseinander stehendes helles Pärchen - beide Sterne sind etwa gleich hell (laut Stelle Doppie 0.68 mag Helligkeitsunterschied)
STF229 9m2 10m3 2.5'' 356° 2018 Tri 02h13m58.92s +34°30'50.80"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Bluish stars, B is a bit faint but wide and clear
★★ STF232 7m8 7m9 6.5'' 66° 2016 Tri 02h14m42.16s +30°23'41.20"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Very beautiful view! With all used magnifications together with iota Tri (6 Tri) in one field of view. Separable at 22x, but the components are still quite close together and appear similarly bright. At 44x easy to separate with little difference in brightness. At 57x a very small color difference is visible without being able to clearly name the colors. STF232 was sketched together with 6 Tri.
Mark McCarthy
Fremont (California/USA)
203mm (205x) Pretty white stars, only a slight delta mag, well split
STF230 7m9 9m4 23.8'' 259° 2015 Per 02h14m57.07s +58°29'26.00"
Rene Merting
Drachhausen (Germany)
16x70 ein knapp getrenntes Pärchen - Komponente B westlich von A wirkt wie ein schwacher Schimmer - kaum ein Farbunterschied, obwohl B gut 1.5 Größenklassen schwächer ist - bei diesem Helligkeitsunterschied wirkt die schwächere Komponente meist dumpf grau-braun, hier ist das nicht der Fall
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x einfach getrennt - Komponente B im Westen ist gut 1.5 Größenklassen schwächer und grau, A ist auch nicht wirklich strahlend weiß - zurück auf 20x noch immer ein gut getrenntes Pärchen
STF237 AB 9m5 9m9 14.5'' 237° 2015 Ari 02h15m42.29s +10°46'15.60"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Near equal obvious split. seeing not all that great, full aperture. (B star is 0.1" pair equal mag)
STF240 8m3 8m6 4.8'' 52° 2018 Ari 02h17m15.74s +23°52'24.80"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Equal white ~9th mag, ~5"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Faint but pretty wide separation ~4", equal magnitude yellowish-white.
STF234 AB 8m7 9m4 0.6'' 222° 2012 Cas 02h17m23.00s +61°21'06.50"

../images/binary-star-orbits/STF234-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (885x) Light orange star, definitely elongated, maybe notched, but no convincing split. Tough little Struve.
STF239 7m1 7m8 13.6'' 212° 2017 Tri 02h17m25.29s +28°44'42.10"
Robert Zebahl
Leipzig (Germany)
55mm (25x) Easy to split, large distance, noticeable difference in brightness.
Mark McCarthy
Fremont (California/USA)
203mm (205x) Wide, white, one delta mag
STF244 9m3 9m4 4.4'' 290° 2018 Ari 02h17m34.01s +22°13'50.30"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Pretty faint, equal magnitude ~3-4", well split.
7 Per, BU1170, S409 BU1170 A-BC 6m1 12m3 68.7'' 358° 2013 Per 02h18m04.58s +57°30'58.70"
S409 AD 6m1 9m6 123.3'' 136° 2015
BU1170 AE 6m1 12m4 207.1'' 12° 2015
BU1170 BC 11m5 11m7 0.3'' 313° 1958
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near the Double Cluster. Pretty orange-yellow star. B star is distant and faint -- how know binary? The B star feels elongated with averted vision.
Mark McCarthy
Fremont (California/USA)
317mm (553x) BU1170 (BC): Near the Double Cluster. Pretty orange-yellow star. B star is distant and faint -- how know binary? The B star feels elongated with averted vision.
STF245 AB 7m3 8m0 11.0'' 294° 2015 And 02h18m36.27s +40°16'43.70"
Rene Merting
Drachhausen (Germany)
16x70 die schwächere Komponente ist nordwestlich des Hauptsterns zu erkennen - es sind eindeutig zwei Sterne, sie sind aber noch nicht eindeutig trennbar
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 64x steht Komponente B im NW gut abgesetzt von A - nur geringer Helligkeitsunterschied - zurück auf 32x dann zeigt sich ein nettes eng stehendes Pärchen
Robert Zebahl
Leipzig (Germany)
120mm (50x) Both components well seen with noticeable difference in brightness.
STF249 7m2 9m0 2.4'' 197° 2018 Tri 02h21m35.66s +44°35'59.70"
Robert Zebahl
Leipzig (Germany)
63mm (168x) Not separated. The diffraction disk showed again and again irregularities, which indicated a double star.
BLL7, S Per 10m8 11m4 69.1'' 20° 2018 Per 02h22m51.72s +58°35'11.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide near equal pair
HLD7 8m0 9m9 1.7'' 182° 2016 Per 02h25m25.96s +58°12'09.30"
Mark McCarthy
Fremont (California/USA)
203mm (533x) Yellow A and bluish b, just split the faint B, in a swimming mess due to poor seeing
Mark McCarthy
Fremont (California/USA)
317mm (553x) Challenging due to poor transparency but no doubt, a 3 delta mag pair in the diffraction, 1.5"
A2329 9m4 9m6 0.5'' 101° 2018 Cet 02h27m45.86s +04°25'55.90"

../images/binary-star-orbits/A2329-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (1067x) Split at 533x but used barlow to confirm the PA accurately since this is a short period pair. Nicely split orange stars, half delta mag. Seeing it now at nearly the furthest extent of its orbit, it will become more difficult with time. The pair is a "mere" 55.91 lightyears away
★★ STF262, iota Cas AB 4m6 6m9 2.9'' 230° 2017 Cas 02h29m03.96s +67°24'08.70"
AC 4m6 9m1 6.7'' 117° 2015
AD 4m6 8m5 210.9'' 60° 2016

../images/binary-star-orbits/STF262-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
55mm (27x) Only the D component was well visible. The components B & C were not visible even at magnifications up to 167x. The sky was clearly brightened (Bortle 7).
Robert Zebahl
Leipzig (Germany)
70mm (120x) Components A, B and C pretty close together, D far apart. Component B appeared slightly elongated on the first diffraction ring of the primary component. Rewarding! ../projects/double-stars/robert-zebahl/sketches/2019-08-25_iota_cas.jpg
Rene Merting
Drachhausen (Germany)
100mm (142x) AB: bei 142x zeigt sich Komponente B im SW mit gut einem Drittel das Abstandes AC, Helligkeitsunterschied 1.5 bis 2 Größenklassen
AC: bei 64x getrennt, schöner Farbkontrast, Komponente A ist weiß mit einem Stich ins Gelbe, C leicht bräunlich
AD: bei 32x extrem weiter Abstand zwischen A und D, Helligkeitsunterschied mehr als 2 Größenklassen (laut Stelle Doppie sogar 3.85 mag)
Uwe Pilz
Leipzig (Germany)
105mm (200x) Dreifachstern lohnend ../projects/double-stars/uwe-pilz/sketches/iotaCas.jpg
Robert Zebahl
Leipzig (Germany)
152mm (129x) Component D easy to see even at lowest magnification. Component C is also easily visible at 49x. At 69x the component B is indicated, at 100x clearly visible. C appears slightly grey-blueish and obviously fainter than B. Grand sight at 129x!
HJL1019 AB 6m1 9m6 217.1'' 323° 2000 Ari 02h29m13.68s +23°28'08.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very wide separation, 1-2 delta mag star to the west-ish. B star is a 0.4" pair, not seen.
STF268 6m7 8m5 2.9'' 131° 2018 Per 02h29m24.96s +55°32'10.50"
Robert Zebahl
Leipzig (Germany)
70mm (80x) At 67x the faint companion can be guessed and is still slightly outshined by the primary component. At 80x and 100x relatively well separable with clear difference in brightness, but close together. The companion is close to the first diffraction ring of the primary component.
Rene Merting
Drachhausen (Germany)
100mm (107x) bei 64x lässt sich der Stern nicht richtig scharf stellen - bei 107x ist Komponente B dann ganz knapp getrennt südöstlich von A erkennbar - Helligkeitsunterschied eine 3/4 Größenklasse (1.78 mag lt. Stelle Doppie)
Robert Zebahl
Leipzig (Germany)
152mm (129x) Easily separable with significant difference in brightness. The fainter companion is nicely separated from the primary component and visible as a tiny star.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange A, faint, wide separated B.
STF263, V528 Cas AB 8m6 10m9 15.0'' 103° 2015 Cas 02h29m37.75s +60°39'26.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) At the end of an arc of three stars of similar magnitude. The pair is wide, 2 delta mag. Quadruple system but with a lot of complicated orbital dynamics going on: AB, AC, AD, BC, BD, CD
STF271 AB 5m9 9m9 12.8'' 183° 2015 Ari 02h30m32.31s +25°14'06.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow white with very faint bluish B, 3 delta mag to south, wide separation.
STF270 AB 7m0 9m7 21.3'' 306° 2016 Per 02h30m50.65s +55°32'54.20"
Rene Merting
Drachhausen (Germany)
16x70 der Doppelstern steht innerhalb einer sehenswerten Formation aus 6 Sternen, die ein gleichseitiges Dreieck bilden - die hellsten drei Sterne bilde eine Seite im Norden, zur Spitze nach Süden werden die Sterne immer schwächer - STF270 steht mitten in der Nordseite - Komponente B ist wie ein kleiner zarter Hauch nordwestlich von A erkennbar, Helligkeitsunterschied mehr als 2.5 Größenklassen - kein reizvoller Fernglas-Doppelstern, aber die Umgebung ist interessant
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein leichter Fang, gut getrenntes Pärchen - Komponente B im NW ist zwar sehr schwach, aber direkt immer noch gut erkennbar - Helligkeitsunterschied 3 Größenklassen - Komponente A strahlend weiß, B eher grau, wenn überhaupt als Farbe erkennbar
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice orange star with wide B
Mark McCarthy
Fremont (California/USA)
317mm (553x) Tighter, 1 D-mag, white A reddish B.
A968 9m0 9m5 1.8'' 27° 2018 And 02h31m15.90s +47°02'32.10"
Robert Zebahl
Leipzig (Germany)
102mm (125x) Clearly split, tight, slightly unequal.
STF93, alp Umi AB 2m0 9m1 18.4'' 236° 2016 UMi 02h31m49.09s +89°15'50.70"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x knallt die Hauptkomponente A schön hellgelb rein, Komponente B ist als feiner zarter Lichtpunkt knapp daneben erkennbar - Größenklassenunterschied nicht abschätzbar, auf jeden Fall riesig
Rene Merting
Drachhausen (Germany)
320mm (45x) bei 45x ist B sehr knapp getrennt von A erkennbar - Komponente A strahl auf den ersten Blick weiß, bei genauerem Hinsehen mischt sich ein zartes Gelb unter
STF272 8m3 8m4 1.9'' 216° 2017 Per 02h33m08.71s +58°27'44.90"
Robert Zebahl
Leipzig (Germany)
152mm (129x) Easy to separate, but close together with very little difference in brightness. Beautiful view. Double star stands in a half arc of stars.
HJ2143 AB 8m1 9m6 23.5'' 20° 2018 Per 02h33m32.79s +57°32'14.80"
Rene Merting
Drachhausen (Germany)
16x70 Komponente B ist nur mit viel Konzentration knapp getrennt und sehr schwach nordöstlich von A zu erkennen - schwierig
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein ordentlich getrenntes Pärchen - Komponente B ist sehr schwach, gut 1.5 Größenklassen schwächer - Komponente A ist weiß, B wirkt grau
Rene Merting
Drachhausen (Germany)
320mm (45x) bei 45x ein weit getrenntes Pärchen, auffallend am südwestlichen Rand der Sternhaufens NGC 957 - Komponente B ist gut 1.5 Magnituden schwächer - A weiß, B rostbraun
A1528 9m4 9m6 1.6'' 193° 2017 And 02h35m42.19s +44°11'23.30"
Robert Zebahl
Leipzig (Germany)
102mm (160x) At 125x almost separated with visible difference in brightness. AT 160x rather faint, barely split, little difference in brightness.
★★ AG304, 15 Tri 5m6 6m8 142.4'' 16° 2013 Tri 02h35m46.82s +34°41'15.20"
Christopher Hay
Seeheim (Germany)
7x50 Well split. Main star yellow-orange, secondary an ice-blue pinprick. With overall brightness of 5m1 just visible to naked eye under my suburban sky. Interesting star field with a line of 5 stars pointing S-SW away from 15 Tri and a further striking star chain to the west. Placing Gamma-Delta-7 Tri within 7.5° FOV makes a very attractive overall field. Mira variable R Tri just ½ degree to the S-SE was around maximum at time of observation and presented a much paler orange than 15 Tri A. Charming colour contrast ensemble with the two components of the double plus the variable.
Rene Merting
Drachhausen (Germany)
18x70 ein extrem komfortabel getrenntes Sternpaar - Komponente A im Süden strahlt weißgelb, B ist 1.5 Größenklassen schwächer und wirkt kupfergrau - interessant: parallel zu den beiden Sternen stehen westlich zwei deutlich schwächere Sterne in gleichem Abstand und Positionswinkel wie die Komponenten von 15 Tri - alle 4 Sterne bilden ein Parallelogramm
Christopher Hay
Seeheim (Germany)
80mm (30x) A beautiful, wide pair. Main star orangish yellow, secondary ice-blue. Attractive star field in 2.7° FOV: several similarly-separated pairs to the north and east, and two striking star chains to the south and west.
★★ 30 Ari STFA5 AB 6m5 7m0 37.9'' 275° 2018 Ari 02h37m00.52s +24°38'50.00"
RAO8 BC 7m0 11m0 0.6'' 282° 2018
Robert Zebahl
Leipzig (Germany)
70mm (22x) AB: At 22x widely separated, striking with a rather small difference in brightness. A seemed a bit warmer in color compared to B with a hint of orange. At 44x, both seemed slightly orange with very little difference in color.
Uwe Pilz
Leipzig (Germany)
105mm (88x) AB: trennbar bei 22x. Weiß und blau ../projects/double-stars/uwe-pilz/sketches/191230_30Ari.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB: Near equal light orange, very wide. B has a C pair 0.6" and 4 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Near equal magnitude, wide separated, PA to WSW
STF285 7m5 8m1 1.7'' 162° 2018 Tri 02h38m45.91s +33°25'08.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very finely split near equal pair. Orange, about 1/2 disk split.
A1279 10m1 10m1 2.1'' 306° 2015 Per 02h40m25.95s +55°18'33.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Can just see the faint star in the 80mm finder. In the scope it is a hazy elongated smear which resolves to two equal points with seeing, 2", Very nice!
STF283 AB 8m4 9m0 1.8'' 210° 2018 Cas 02h40m31.92s +61°29'02.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Well split light orange pair, half delta mag.
STF284, V482 Cas AB 7m9 9m9 6.9'' 190° 2018 Cas 02h40m44.95s +61°16'56.10"
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 64x zeigt sich Komponente B gut getrennt südlich von A - schönes Kontrastpaar, bestimmt 2.5 Größenklassen Helligkeitsunterschied
STF291 AB 7m7 7m5 3.4'' 118° 2017 Ari 02h41m06.59s +18°48'00.70"
AC 7m7 9m5 65.5'' 242° 2015
Robert Zebahl
Leipzig (Germany)
70mm (57x) AB: At 44x almost, at 57x clearly split, but still very tight with rather small difference in brightness.
Uwe Pilz
Leipzig (Germany)
105mm (88x) hellster Stern gelb, andere Farben nicht erkennbar ../projects/double-stars/uwe-pilz/sketches/191230stf291.jpg
STF295, 84 Cet 5m8 9m7 3.6'' 301° 2012 Cet 02h41m14.00s -00°41'44.40"

../images/binary-star-orbits/STF295-orbit.jpg

Robert Zebahl
Leipzig (Germany)
102mm (160x) Quite easy at a moderate distance, whereby the companion appeared rather faint and was best visible with averted vision.
Uwe Pilz
Leipzig (Germany)
105mm (144x) trotz diesigem Himmel bei 144x indirekt erkennbar. Schwieriger bei 200x ../projects/double-stars/uwe-pilz/sketches/200111_84Cet.jpg
Robert Zebahl
Leipzig (Germany)
152mm (129x) Easy. The quite dim companion is immediately visible in moderate distance clearly outside of the first diffraction ring despite few, high clouds. The primary component appeared white-yellowish.
HJ1123 8m4 8m5 20.1'' 249° 2018 Per 02h41m58.44s +42°47'30.60"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x knapp getrennt - ein schwacher Doppelstern, der kaum auffällt im Zentrum des Sternhaufens M 34
★★ STT44 AB 8m5 9m0 1.4'' 56° 2018 Per 02h42m13.13s +42°41'57.20"
AC 8m5 8m3 87.2'' 290° 2017
Uwe Pilz
Leipzig (Germany)
105mm (200x) AB: schwierig
Robert Zebahl
Leipzig (Germany)
152mm (129x) AB: At 129x barely separable, at 150x separated quite clearly with a noticeable difference in brightness. The double star is located within Messier 34!
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: In M34 open cluster! Close near equal pair, 1.5", very nice! The cluster is pretty, loose, and jangly with stars of varying magnitudes. What a treat.
BU521 AB 6m3 11m6 5.4'' 159° 2015 Per 02h43m01.98s +48°15'54.90"
Mark McCarthy
Fremont (California/USA)
317mm (885x) Bulging heart shape (if seen from slightly below and to the side), even at 885x, but no split. Light yellow-orange.
gamma Cet, 86 Cet, Kaffaljidhma STF299 AB 3m5 6m2 2.0'' 299° 2015 Cet 02h43m18.04s +03°14'08.90"
ALD124 AC 3m5 10m2 843.1'' 306° 2000
Rene Merting
Drachhausen (Germany)
100mm (142x) AB: bei 142x wirkt der Doppelstern leicht länglich, die Beugungsscheibchen sind jetzt schon zu groß (mittleres Seeing), um sinnvoll weiter zu vergrößern
Uwe Pilz
Leipzig (Germany)
105mm (144x) AB: extrem schwierig ../projects/double-stars/uwe-pilz/sketches/191129gammaCet.jpg
BU306 AB 6m4 10m4 3.0'' 19° 2015 Ari 02h43m51.25s +25°38'18.00"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Very nice white and 3 delta mag bluish B, nicely seen 4".
Mark McCarthy
Fremont (California/USA)
317mm (553x) ~4", ~4 delta mag, PA to north. very faint blue but steady.
STF300 7m9 8m1 3.2'' 316° 2018 Ari 02h44m36.85s +29°27'36.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint but very easy 3-4" separated pair. Near equal magnitude.
BU307 7m1 11m6 16.0'' 317° 2015 Ari 02h47m38.61s +29°40'42.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint B to WNW, wide separation, not terribly difficult.
STF301 7m8 8m7 8.2'' 18° 2016 Per 02h47m38.75s +53°56'35.80"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Rather faint double star with a handful of other stars in the immediate vicinity. At 22x clearly separated, but still close together with visible difference in brightness. At 31x the primary component looked slightly orange.
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ganz knapp getrenntes Pärchen - Komponente B im Norden ist eine halbe Größenklasse schwächer - nett anzusehen
STF311, pi Ari, 42 Ari AB 5m3 8m0 3.3'' 118° 2015 Ari 02h49m17.55s +17°27'51.50"
Robert Zebahl
Leipzig (Germany)
70mm (133x) The companion is visible as elongated, non-condensed brightening in the first diffraction ring of the primary component.
Uwe Pilz
Leipzig (Germany)
105mm (144x) sehr schwierig bei 88x, eindeutig bei 144x ../projects/double-stars/uwe-pilz/sketches/191230_PiAri.jpg
STT46 AB 6m8 10m8 4.8'' 75° 2015 Ari 02h50m00.31s +30°31'34.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow with very faint orangish B, PA to NE, ~5-6".
★★ eta Per, 15 Per STF307 AB 3m8 8m5 28.7'' 301° 2018 Per 02h50m41.81s +55°53'43.80"
STF307 AC 3m8 11m6 64.0'' 269° 2014
WAL19 AF 3m8 11m4 57.7'' 25° 2013
WRD1 CD 11m6 12m7 5.2'' 116° 2015
SHJ34 AE 3m8 9m2 242.9'' 297° 2012
FYM161 CG 11m6 14m0 15.8'' 229° 2015
Rene Merting
Drachhausen (Germany)
16x70 STF307 (AB): Miram, die Komponente A ist satt gelb und bildet ein flaches Dreieck mit zwei Sternen westlich und nordwestlich, die aber 1,8' und 3,9' entfernt stehen - dazwischen wird alles vom Glanz von Miram überstrahlt - im Fernglas hat B mit den eigentlich ordentlichen Daten wie Abstand 30,4" und Helligkeit 8.5 mag (andere Quellen sagen 10.7 mag) trotzdem keine Chance auf Erleuchtung
Rene Merting
Drachhausen (Germany)
100mm (32x) STF307 (AB): bei 32x sehr ansehnlich - Komponente B steht gut getrennt nordwestlich vom signal-gelben Eta Persei - Helligkeitsunterschied sehr groß, nicht abschätzbar
Uwe Pilz
Leipzig (Germany)
105mm (88x) Dreifachsystem, nahe Komponente: PW und Abstand stimmt, is aber viel zu dunkel (10m statt 8m5). Ein Mysterium
Mark McCarthy
Fremont (California/USA)
317mm (553x) STF307 (AB): Orange with faint, bluish, widely separated B.
STF316 9m5 9m7 14.4'' 135° 2018 Per 02h52m05.13s +37°17'45.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide near equal
STF314 AB-C 7m0 7m3 1.6'' 316° 2018 Per 02h52m52.03s +52°59'50.60"

../images/binary-star-orbits/STF314-AB-C-orbit.jpg

Robert Zebahl
Leipzig (Germany)
152mm (129x) Beautifully separated, quite close together. Difference in brightness visible, but rather small. Easy to find and bright. Very nice.
Frederik Wanink
Itterbeck (Germany)
254mm (460x) ähnlich hell ../projects/double-stars/frederik-wanink/sketches/STF314.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) a nice half delta mag pair ~2"
Mark McCarthy
Fremont (California/USA)
317mm (553x) near equal brightness, AB more yellow yellow-white of the two, ~2 disk separation
A2906 AB 7m3 8m8 0.3'' 115° 2018 Per 02h52m52.03s +52°59'50.60"

../images/binary-star-orbits/A2906-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) This is the brighter of the STF 314 pair. I have a feeling it is slightly elongated but nothing certain.
STT48 6m4 10m6 6.6'' 317° 2016 Per 02h53m21.07s +48°34'11.90"
Mark McCarthy
Fremont (California/USA)
317mm (885x) Yellow-orange with bluish round haze above it, the haze brightens with seeing and averted vision but does not resolve to point even at 885x
STF318, 20 Per AB-C 5m4 9m7 14.0'' 237° 2014 Per 02h53m42.58s +38°20'15.60"
Rene Merting
Drachhausen (Germany)
100mm (64x) trotz großem Abstand sind 64x notwendig für die Trennung - Komponente C ist zu schwach für niedrigere Vergrößerungen, vielleicht 3.5 mag schwächer als AB - jetzt bei 64x, wo C sichtbar wird, ist sie schon gut abgesetzt von AB erkennbar und wirkt leicht bräunlich, AB dagegen wirkt warm-weiß
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide 2 delta mag. no sign of elongation of BU 524, which should be the B star's pairing
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow, 2 delta mag, blue B. Wide separation.
BU1293 6m8 10m4 2.0'' 349° 1991 Per 02h54m00.98s +47°09'39.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Uncertain. Seems a brightening persistent on one side of the diffraction but nothing resolves when A resolves with seeing. Poor transparency during the observation
BU525 7m5 7m5 0.5'' 276° 2018 Ari 02h58m53.11s +21°37'03.90"

../images/binary-star-orbits/BU525-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Star is decidedly not round but does not show shape other than a stretching.
STF333, eps Ari AB 5m2 5m6 1.4'' 211° 2018 Ari 02h59m12.73s +21°20'25.60"

../images/binary-star-orbits/STF333-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Equal bright white just split with seeing.
STF331 5m2 6m2 11.8'' 86° 2018 Per 03h00m52.18s +52°21'06.50"
Robert Zebahl
Leipzig (Germany)
63mm (46x) Easy to separate with relatively large difference in brightness.
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein feines Pärchen, besser als knapp getrennt und richtig hell - Komponente A im Osten ist rein weiß, B dagegen in einem eigenartigen kupfer-weiß, wenn man das so sagen kann - bei 20x passt nur noch ein dünnes Blatt Papier zwischen die beiden Sterne
Uwe Pilz
Leipzig (Germany)
105mm (150x) einfach
Mark McCarthy
Fremont (California/USA)
203mm (333x) Slightly yellow-white pair, wide, about 1.5 delta mag
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow A. B ~1 D-mag.
STF336 7m0 8m3 8.7'' 2018 Per 03h01m29.07s +32°24'45.80"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Nice light orange and light blue stars, 1.5 delta mag, wide, ~9"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide separation B orange A
STF337 AB 8m0 9m3 17.6'' 163° 2015 Per 03h02m16.79s +41°23'45.70"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein gut getrenntes Pärchen, Komponente B im SO ist deutlich schwächer, gerade so erkennbar - deshalb wirkt B auch farblos gegen die weiße Komponente A
STF346, 52 Ari AB-C 5m5 10m8 5.1'' 358° 2005 Ari 03h05m26.69s +25°15'18.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright yellow-white AB, orange C. ~4-5 delta mag, 5-6" PA to N. Did not notice AB 0.5"
ES558 7m7 10m6 8.5'' 2010 Per 03h06m47.76s +45°45'02.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow-orange star with very faint bluish companion, 5", 2-3 delta mag.
STF360 8m0 8m3 2.7'' 126° 2015 Per 03h12m09.59s +37°13'03.30"

../images/binary-star-orbits/STF360-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (67x) Pretty faint double star. At 57x barely separable with almost touching diffraction disks. The components seemed similarly bright. At 67x still very close together, at 100x easy to separate.
Robert Zebahl
Leipzig (Germany)
152mm (69x) Split, but close together, similarly bright. The double star appears overall slightly orange compared to the surrounding stars.
★★ STT51 8m5 8m7 0.6'' 346° 2018 Per 03h12m57.08s +44°17'14.70"

../images/binary-star-orbits/STT51-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Very fine clean split at the finest moments, which is once every 10 seconds. 0.5", equal mag.
HU544 6m7 8m2 1.7'' 103° 2018 Per 03h15m48.70s +50°57'21.20"

../images/binary-star-orbits/HU544-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (133x) Clearly seen as figure '8' with noticeable difference in brightness.
Uwe Pilz
Leipzig (Germany)
105mm (196x) klebt am ersten Ring ../projects/double-stars/uwe-pilz/sketches/Hu544.jpg
Uwe Pilz
Leipzig (Germany)
105mm (260x) im ersten Ring
Robert Zebahl
Leipzig (Germany)
152mm (129x) Wonderfully separated in equally beautiful star surroundings! Clear difference in brightness visible. To the east there is a brighter star, which shines yellowish-orange. HU544 itself seems rather cool in color. ../projects/double-stars/robert-zebahl/sketches/2019-11-23_hu544.jpg
STF369 6m8 7m7 3.6'' 29° 2016 Per 03h17m11.45s +40°28'58.60"
Robert Zebahl
Leipzig (Germany)
70mm (57x) At 44x still separable with noticeable difference in brightness. At 57x well separable, whereby the components are still very close together. The difference in brightness is more clearly visible here.
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 64x knapp getrennt - Komponente B im NO wirkt eine halbe Größenklasse schwächer - beide Sterne schneeweiß
Robert Zebahl
Leipzig (Germany)
152mm (100x) Easily separable with clear difference in brightness. In terms of color, both components appeared slightly different: white-yellowish, slightly orange.
STF375 AB 7m6 9m9 2.7'' 316° 2009 Ari 03h20m21.23s +23°41'21.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 1.5" orange B, 3-4 delta mag. Nice.
COU259, tau 1 Ari 5m3 8m1 0.9'' 217° 2016 Ari 03h21m13.63s +21°08'49.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Tau Ari. Bright, barely oval. Marginal.
STF381 7m6 8m8 1.1'' 109° 2018 Ari 03h23m19.33s +20°58'13.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange-yellow with 2x fainter B, very close split, with seeing, tough one.
TOK13, UX Ari AB 6m6 10m0 95.6'' 129° 2014 Ari 03h26m35.36s +28°42'55.20"
Mark McCarthy
Fremont (California/USA)
317mm (270x) UX Ari: Orange star with very faint wide blue B
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange-yellow with very wide 2x fainter B
STF388 8m0 9m0 2.8'' 214° 2018 Per 03h28m40.39s +50°26'10.80"
Rene Merting
Drachhausen (Germany)
100mm (107x) bei 107x zeigt sich Komponente B südlich von A und nur in guten Momenten sind beide Sterne knapp getrennt zu sehen
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty blue and a little red pair, 1.5 delta mag. On the northern edge of Stock 1.
STF391 7m6 8m3 3.9'' 96° 2018 Per 03h29m13.74s +45°02'57.50"
Robert Zebahl
Leipzig (Germany)
70mm (57x) Clearly split, but close together, moderate difference in brightness. The double star is located in a very beautiful star field with some of the stars appearing colored, but this only came into its own at low magnification.
Robert Zebahl
Leipzig (Germany)
152mm (69x) Easy to separate with moderate difference in brightness. Slight difference in color: white-yellowish, slightly orange.
BU1179, 34 Per 4m7 7m3 0.6'' 141° 2016 Per 03h29m22.05s +49°30'32.20"
Mark McCarthy
Fremont (California/USA)
317mm (885x) Uncertain but can't resolve even at 885x
STF343 AB 8m4 9m8 35.3'' 327° 2015 Cep 03h29m50.94s +84°02'19.70"
AC 8m4 12m9 90.5'' 309° 2015
Rene Merting
Drachhausen (Germany)
100mm (20x) AB: bei 32x sind zwei schwache Sterne mit ordentlichem Abstand erkennbar - Komponente B ist eine Größenklasse schwächer und leicht grau-braun - zurück auf 20x ist B noch gerade so zu erkennen und wirkt nun etwas weißer
Rene Merting
Drachhausen (Germany)
320mm (72x) AB: bei 72x üppig getrennt, ein Pärchen mit schönem Farbkontrast, Komponente A strahlt weiß, B orangebraun
AC: bei 72x ist nordwestlich über AB in dreifacher Entfernung Komponente C zu erkennen - C ist nochmal deutlich schwächer als B
STF389 AB 6m4 7m9 2.6'' 72° 2018 Cam 03h30m10.93s +59°21'57.80"
Uwe Pilz
Leipzig (Germany)
60mm (198x) Ein Hauch mit einem Abstand von 0,4 Beugungsscheibendurchmesser, sehr schwierig. Einfach bei 105mm
Robert Zebahl
Leipzig (Germany)
70mm (133x) Easy to find and separated at 67x, but very tight. Easily separable at 133x, still relatively tight together with significant difference in brightness.
STFA7 AB 7m4 7m8 44.1'' 234° 2017 Tau 03h31m03.47s +27°43'53.60"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Nice finder split, equal mag but faint, ~8th mag.
Mark McCarthy
Fremont (California/USA)
80mm (13x) Pretty finder split.
Uwe Pilz
Leipzig (Germany)
105mm (288x) gleichhell, einfach ../projects/double-stars/uwe-pilz/sketches/stfa7.jpg
Robert Zebahl
Leipzig (Germany)
120mm (18x) Well split with noticeable difference in brightness. Nice view together with the double star STF401 located southeast.
STF401 AB 6m6 6m9 11.5'' 270° 2018 Tau 03h31m20.76s +27°34'18.50"
Christopher Hay
Seeheim (Germany)
18x80 Cleanly split. Supplemented nicely by the wide pair STFA7 directly north, in very star-poor surroundings in 4° FOV.
Uwe Pilz
Leipzig (Germany)
105mm (288x) ein Hauch schwärze dazwischen ../projects/double-stars/uwe-pilz/sketches/stf401.jpg
Robert Zebahl
Leipzig (Germany)
120mm (18x) Barely split at 18x. At 40x difference in brightness is visible. Nice view together with the double star STFA7 located northwest.
Mark McCarthy
Fremont (California/USA)
317mm (270x) equal mag, white, well separated.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal white ~7", nice, W-E. Forms a double-double in wider FOV with STF 375.
STF396 AB 6m4 7m7 20.5'' 245° 2018 Cam 03h33m32.19s +58°45'55.30"
Rene Merting
Drachhausen (Germany)
18x70 in diesem FG ein schönes enges (knapp getrenntes) Paar - B steht südwestlich, weil beide Sterne so eng stehen, ist der Helligkeitsunterschied schwer abschätzbar, ich denke 1 bis 1.5 Größenklassen
STF412, 7 Tau AB 6m6 6m9 0.8'' 349° 2018 Tau 03h34m26.62s +24°27'52.10"

../images/binary-star-orbits/STF412-AB-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (260x) A-B länglich
BU533 AB 7m5 7m7 1.0'' 222° 2018 Per 03h35m37.81s +31°40'48.70"

../images/binary-star-orbits/BU533-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
152mm (225x) At 129x clearly elongated, notched. At 225x just so separable with similarly bright components.
Mark McCarthy
Fremont (California/USA)
317mm (270x) Overlapping yellow-orange disks, equal mag
S430 AB 7m2 7m5 41.0'' 96° 2017 Per 03h38m18.83s +44°48'06.50"
Rene Merting
Drachhausen (Germany)
16x70 ein schöner Fernglas-Stern - beide Komponenten sind hell genug und stehen weit genug auseinander - sie sind mehr als ordentlich getrennt - die B-Komponente im Osten wirkt ein bisschen wärmer im Farbton
STTA36 A-BC 6m9 8m3 45.9'' 72° 2018 Cam 03h39m58.81s +63°52'13.40"
Rene Merting
Drachhausen (Germany)
18x70 ein mehr als gut getrenntes Pärchen mit einem leichten Farbkontrast - Komponente B im Westen ist gut eine Größenklasse schwächer und wirkt graublau - A hat sich wie meist gut die Zähne geputzt, strahlend weiß - übrigens auch ein schöner Kontrast mit dem ebenfalls im Gesichtsfeld stehenden etwas mehr als 1° südlich befindlichen Stern U Cam, der knallig orange strahlt
STF425 AB 7m5 7m6 1.9'' 59° 2018 Per 03h40m07.24s +34°06'59.30"

../images/binary-star-orbits/STF425-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
152mm (129x) Beautifully separated, relatively close together, very little difference in brightness.
STF427, V1268 Tau 7m4 7m8 7.0'' 207° 2016 Tau 03h40m38.77s +28°46'24.00"
Mark McCarthy
Fremont (California/USA)
80mm (13x) V1268: Wide near equal orange in finder. Loses its color when viewed in the scope under high magnification.
Robert Zebahl
Leipzig (Germany)
120mm (40x) At 40x barely split. At 75x easily split with visible difference in brightness.
Mark McCarthy
Fremont (California/USA)
317mm (270x) Near equal mag, white and fainter B is yellow, well split.
STT59 7m9 8m8 2.8'' 356° 2018 Per 03h40m40.62s +46°01'24.10"
Robert Zebahl
Leipzig (Germany)
70mm (67x) Already separable at 67x, but very tight. Easy to separate at higher magnification. Difference in brightness clearly visible.
Robert Zebahl
Leipzig (Germany)
152mm (100x) Nicely separated, but close together. Primary component appears rather whitish, companion darker with a hint of orange.
STF431, 40 Per 5m0 10m0 19.8'' 244° 2010 Per 03h42m22.64s +33°57'54.10"
Mark McCarthy
Fremont (California/USA)
317mm (270x) Wide, 2 delta mag, white-yellow and very faintly blue
WEB2 AD 5m7 8m4 54.9'' 37° 2018 Cam 03h42m42.73s +59°58'09.80"
Rene Merting
Drachhausen (Germany)
18x70 ein komfortabel getrenntes sehr ungleiches Paar - Komponente A im Südwesten ist hell und cremegelb - Komponente D muss mindestens 3 Größenklassen schwächer sein und wirkt dadurch wie eine graue Maus
STF419 AB 7m8 7m8 2.9'' 73° 2018 Cam 03h42m45.19s +69°50'44.30"
Robert Zebahl
Leipzig (Germany)
70mm (67x) Separated, but tight with equally bright components. Beautiful sight.
STF435 7m2 8m9 13.2'' 2015 Tau 03h43m06.52s +25°40'52.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide orange and blue, 2 delta mag. Nice big orange finder split 1 degree to the north from here, one of which has a faint wide pair when viewed through the telescope.
HJL1024 AB 8m0 9m6 196.7'' 175° 2015 Tau 03h43m41.53s +23°38'56.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very wide faint companion, ~3 delta mag.
STF437 9m8 10m0 11.2'' 310° 2015 Per 03h44m09.15s +32°07'09.30"
Uwe Pilz
Leipzig (Germany)
105mm (88x) einfach
★★ BU535, omicron Per, 38 Per, Atik 3m9 6m7 1.1'' 20° 2015 Per 03h44m19.13s +32°17'17.70"
Uwe Pilz
Leipzig (Germany)
105mm (88x) =omikron Per, in IC348, lohnend! ../projects/double-stars/uwe-pilz/sketches/ic348.jpg
Robert Zebahl
Leipzig (Germany)
152mm (300x) In steady moments the faint companion is clearly recognizable as a small brightening in the first diffraction ring of the primary component.
Mark McCarthy
Fremont (California/USA)
317mm (270x) No split at 270x
HU103 AB 8m7 8m9 1.2'' 203° 2018 Per 03h45m22.61s +49°51'42.40"
Robert Zebahl
Leipzig (Germany)
152mm (225x) At 100x slightly elongated, at 129x elongated, notched. At 225x clearly separated, but tight with little difference in brightness.
★★ BU536, S437, SAO76169 S437 AB-C 8m1 7m7 38.8'' 308° 2017 Tau 03h46m16.00s +24°11'23.50"
BU536 AB 8m1 9m4 1.1'' 178° 2016
BU536 CD 7m7 12m9 18.3'' 2015

../images/binary-star-orbits/BU536-AB-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (288x) in den Plejaden
STF450 AB 7m3 9m4 5.8'' 263° 2017 Tau 03h47m24.41s +23°54'52.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Easy yellow-blue 5” 1.5 delta mag.
STF448 6m7 9m4 3.5'' 13° 2016 Per 03h47m52.66s +33°35'59.50"
Mark McCarthy
Fremont (California/USA)
317mm (270x) 2 delta mag 5" separated white and a little green-blue B
STT63 6m2 11m2 6.7'' 269° 2016 Per 03h48m18.08s +50°44'12.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice white disk with slightly blue haze 6" out but not resolved to point due to poor transparency.
HU1067, XY Per 9m7 10m6 1.3'' 77° 2015 Per 03h49m36.35s +38°58'55.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Light orange star, small, definitely elongated at 553x. Seems to resolve in best moments to a very faint B star, but uncertain. Very faint in the finder, at its limit.
STT64 AB 6m8 10m2 3.3'' 235° 2014 Tau 03h49m58.06s +23°50'55.30"
Mark McCarthy
Fremont (California/USA)
317mm (270x) Light orange star with 3-4 delta mag, ~3" separated companion, white
GRV195 AC 8m0 11m1 60.8'' 330° 2014 Tau 03h51m20.24s +26°21'13.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide separation, 2 delta mag. Did not see elongation in A for A1830AB
STT66 8m1 8m5 1.0'' 146° 2018 Per 03h52m04.69s +40°47'50.70"

../images/binary-star-orbits/STT66-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (270x) light orange equal magnitude, split with seeing, close ~1"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Wide separation orange stars of similar brightness
HJ3253 8m1 9m7 31.9'' 73° 2015 Tau 03h52m10.39s +26°13'53.00"
Rene Merting
Drachhausen (Germany)
18x70 Komponente B zeigt sich schwach aber gut getrennt östlich von A - mindestens 1.5 Größenklassen Helligkeitsunterschied
STF464, zeta Per, 44 Per AB 2m9 9m2 12.9'' 209° 2012 Per 03h54m07.92s +31°53'01.20"
AC 2m9 11m2 33.3'' 286° 2012
AD 2m9 10m4 98.6'' 195° 2012
AE 2m9 10m0 120.0'' 186° 2012
Robert Zebahl
Leipzig (Germany)
102mm (106x) AB: Easy to separate, but the B component appeared only as a very faint, tiny companion.
Mark McCarthy
Fremont (California/USA)
317mm (270x) AB: Triple system, 2 very faint stars nearby. Did not see BU 535 1.1" 3 delta mag, the second star I saw not in system
★★★ STF470, 32 Eri AB 4m8 5m9 6.9'' 349° 2018 Eri 03h54m17.49s -02°57'17.00"
Robert Zebahl
Leipzig (Germany)
55mm (27x) At 27x split, but still tight with noticeable difference in brightness. A slight difference in colors could be seen. At 56x the color difference was very evident: The brighter component appeared slightly yellowish, the fainter one slightly bluish. Highly recommended! The sketch was done few days later during another observation. ../projects/double-stars/robert-zebahl/sketches/2019-02-09_32_eri.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) Farbkontrast, gelborange-blauweiß ../projects/double-stars/uwe-pilz/sketches/32Eri.jpg
STF471, epsilon Per, 45 Per AB 2m9 8m9 9.1'' 10° 2015 Per 03h57m51.22s +40°00'36.90"
Robert Zebahl
Leipzig (Germany)
63mm (46x) Easy to separate, but much fainter, second component, which appears as a small, faint spot. Nice view.
STT68, IQ Per AB 7m8 9m2 39.1'' 176° 2015 Per 03h59m44.66s +48°09'04.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty, close split in 80mm finder. Nice & wide 1 delta mag in scope. Is IQ Per
STF479 AB 6m9 7m8 7.5'' 127° 2018 Tau 04h00m56.81s +23°12'05.40"
AC 6m9 9m4 57.7'' 243° 2018
Robert Zebahl
Leipzig (Germany)
102mm (28x) Components A & B clearly separated with visible difference in brightness. Noticeably fainter component C much wider apart. All three components form an obtuse triangle.
Robert Zebahl
Leipzig (Germany)
152mm (49x) Nice view. All three components easy to separate. A: white-yellowish; B: creamy white.
Robert Zebahl
Leipzig (Germany)
200mm (37x) AB: Nice, evident double star, easy to split. Slight difference in brightness.
Mark McCarthy
Fremont (California/USA)
317mm (207x) AB: Wide separation but closer than the AC, about half a delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (207x) AC: 2x fainter than A star, and much wider than AB separation.
STF483 7m4 9m3 1.6'' 53° 2018 Per 04h04m07.10s +39°30'35.00"

../images/binary-star-orbits/STF483-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (270x) Yellow-orange star, very close, 1", 2 delta mag.
STT558, 37 Tau AB 4m5 10m0 135.0'' 194° 2013 Tau 04h04m41.71s +22°04'54.90"
Mark McCarthy
Fremont (California/USA)
317mm (207x) 37 Tau: Orange star with much fainter wide pair
STT531, 50 Per AB 7m3 9m7 2.7'' 353° 2018 Per 04h07m34.35s +38°04'28.30"

../images/binary-star-orbits/STT531-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (270x) AC is a finder split. The fainter of these has another star split 4", 2-3 delta mag., this is the AB pair.
SZ Cam, STF485 AE 6m9 6m9 18.0'' 306° 2018 Cam 04h07m51.38s +62°19'48.40"
Robert Zebahl
Leipzig (Germany)
8x40 Split, but very tight with equally bright components. I used a tripod.
Rene Merting
Drachhausen (Germany)
18x70 die beiden hellen Sterne im OS 1502 - knapp getrennt, gleich hell - es würde noch genau ein solch heller Stern zwischen die beiden passen
Robert Zebahl
Leipzig (Germany)
70mm (15x) Easily split with nearly equally bright components. Located in the center of the open cluster NGC1502. Very nice view.
STF494 7m5 7m7 5.3'' 188° 2018 Tau 04h08m53.50s +23°05'55.10"
Robert Zebahl
Leipzig (Germany)
102mm (62x) At 28x separated, but very tight, similarly bright, both whitish. At 62x easy to separate, little difference in brightness and color: slightly orange; white-blueish. Color impression slightly more intense at 86x.
Robert Zebahl
Leipzig (Germany)
152mm (49x) Easy to separate at 49x with subtle color differences: slightly orange; white-blueish. Color impression slightly more intense at 100x. Beautiful sight.
STF3114 AB 7m7 9m6 3.1'' 157° 2018 Per 04h09m10.26s +40°09'40.50"
Mark McCarthy
Fremont (California/USA)
317mm (270x) Pretty light yellow star with 2 delta mag orangish B, ~3"
STF500 8m8 10m7 4.0'' 79° 2018 Per 04h11m41.62s +40°15'54.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 1 delta mag, ~4", very hazy.
omicron 2 Eri, 40 Eri, STF518 A-BC 4m4 9m3 83.7'' 102° 2016 Eri 04h15m16.32s -07°39'10.30"
BC 9m5 11m2 8.3'' 331° 2017

../images/binary-star-orbits/STF518-BC-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (244x) A ist gelblich. B fiel sofort ins Auge, auch bei 144x. C war extrem schwierig. A musste außerhalb des Gesichtsfeldes stehen, aber auch dann war er nur indirekt sichtbar. Dann aber überraschte der verhältnismäßig große Abstand B-C. ~ A ist ein Hauptreihenstern ähnlich der Sonne. B ist ein weißer Zwerg, einer der hellsten am Himmel. C ist ein Roter Zwerg, davon gibt es nicht viele in der Reichweite kleiner Instrumente. Insgesamt hat man drei Zwergsterne auf einen Blick: Einen gewöhnlichen (=Hauptreihen-) Zwerg, einen weißen und einen roten. ../projects/double-stars/uwe-pilz/sketches/200120_40Eri.jpg
Berthold Fuchs
Wiesbaden (Germany)
130mm A-BC: Triplesystem with a white Dwarf ../projects/double-stars/berthold-fuchs/photographs/Keid.png
HO328 7m4 9m1 0.4'' 358° 2016 Tau 04h17m01.22s +19°40'32.60"

../images/binary-star-orbits/HO328-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Olive shape. Light yellow-orange star, no clean split but clearly elongated.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint, very close ~0.8", emerges with seeing, hair split. Marginal
LDS5535 5m0 9m6 179.9'' 118° 2015 Tau 04h17m15.69s +20°34'43.50"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Omega Tau: very wide finder split, 2 delta mag.
STF520 8m3 8m4 0.7'' 81° 2018 Tau 04h18m14.55s +22°48'24.60"

../images/binary-star-orbits/STF520-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint elongated to overlapping disks.
BU310 7m1 12m6 18.9'' 173° 2015 Per 04h22m00.26s +39°56'03.30"
Mark McCarthy
Fremont (California/USA)
317mm (270x) The pair is one or both of two faint widly separated stars, makes a triangle. A is light orange.
BU87 6m2 8m6 1.9'' 167° 2012 Tau 04h22m22.74s +20°49'16.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange star with 1.5" blue 3 delta mag pair. Definite disks, well split, round with seeing.
STT82 AB 7m3 8m6 1.2'' 327° 2018 Tau 04h22m44.10s +15°03'22.10"

../images/binary-star-orbits/STT82-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Very close, 0.8" 1.5 delta mag, PA to N/NW.
STF533 AB 7m3 8m5 20.2'' 61° 2017 Per 04h24m24.85s +34°18'53.10"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Finder split, fairly wide, 1 delta mag
STT81, 56 Per AB 5m8 9m2 4.2'' 13° 2017 Per 04h24m37.46s +33°57'34.90"

../images/binary-star-orbits/STT81-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (270x) 56 Per. Pretty yellow and slight red pair, 2 delta mag.
STF546 7m9 9m2 6.8'' 181° 2015 Tau 04h27m00.62s +19°07'03.60"
Uwe Pilz
Leipzig (Germany)
105mm (144x) ../projects/double-stars/uwe-pilz/sketches/200115stf546.jpg
STF545 AB 6m9 8m8 18.5'' 58° 2016 Tau 04h27m04.85s +18°12'27.10"
Uwe Pilz
Leipzig (Germany)
105mm (288x) Begleiter schwach, erfordert sehr hohe Vergrößerung. Hauptstern weiß ../projects/double-stars/uwe-pilz/sketches/200115stf545.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide, white, 1.5 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Blush white, ~2 delta mag, PA to NE, wide separation.
BGH2, V921 Tau AB 7m0 9m1 109.5'' 2015 Tau 04h29m30.35s +17°51'47.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White, wide, 1 delta mag.
STF554, 80 Tau 5m7 8m1 1.5'' 16° 2015 Tau 04h30m08.60s +15°38'16.20"

../images/binary-star-orbits/STF554-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) 1" 2 delta mag, PA N. Nice!
LDS2246 AB 4m8 6m5 250.3'' 131° 2014 Tau 04h30m33.63s +16°11'38.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) A star is white, bright, perfect disk, the pair very wide, 2 delta mag.
★★ STF559 7m0 7m0 3.0'' 277° 2018 Tau 04h33m33.04s +18°01'00.20"
Robert Zebahl
Leipzig (Germany)
70mm (57x) Barely split with similarly bright components.
Robert Zebahl
Leipzig (Germany)
102mm (160x) Very nice view! Easy to separate, similarly bright at a nice distance from each other. The colors of the components changed over time: orange and subtle blue.
Uwe Pilz
Leipzig (Germany)
105mm (144x) trennbar mit 88x, westlicher Stern scheint etwas heller und gelb-orange, östlicher Stern orange ../projects/double-stars/uwe-pilz/sketches/200115stf559.jpg
Robert Zebahl
Leipzig (Germany)
152mm (69x) Beautiful sight, similar bright components, pretty tight.
SHJ45, 88 Tau AB 4m3 7m8 69.2'' 300° 2017 Tau 04h35m39.23s +10°09'39.30"
Sarah Gebauer
Germany
150mm (30x) mit freiem Auge als ein Stern erkannt, bei 30x sauber getrennt mit sichtbarem Helligkeitsunterschied ../projects/double-stars/sarah-gebauer/sketches/20191230%2088%20Tau%20DSk.jpg
STFB2, alp Tau AC 0m8 11m3 136.5'' 31° 2016 Tau 04h35m55.24s +16°30'33.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Aldebaran: Very bright orange with a lot of glare, but there is a steady faint star halfway to the field stop
STTA53 7m5 7m6 78.8'' 352° 2017 Tau 04h37m26.72s +00°33'11.20"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Finder split, 1 delta mag. White and dully yellow.
STF572 AB 7m4 7m2 4.4'' 189° 2018 Tau 04h38m29.58s +26°56'25.60"

../images/binary-star-orbits/STF572-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (57x) Clearly separated, easy with beautiful color contrast: A slightly orange, B white.
S455, tau Tau AB 4m2 7m0 62.5'' 214° 2017 Tau 04h42m14.70s +22°57'25.10"
Sarah Gebauer
Germany
150mm (30x) mit freiem Auge als ein Stern gesehen, bei 30x weit getrennt, eine Komponente ist deutlich heller als die andere ../projects/double-stars/sarah-gebauer/sketches/20191230%20Tau%20Tau%20DSk.jpg
LDS2266 AB 7m2 10m2 141.7'' 103° 2015 Tau 04h42m51.64s +18°43'14.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange, with a very wide 2 delta mag pair.
STTA55 8m2 9m2 37.4'' 17° 2015 Ori 04h49m07.80s +05°12'30.70"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein schön weit auseinander stehendes filigranes Sternpaar - Komponente B im NO wirkt eine halbe Größenklasse schwächer, das Weiß nicht ganz so klar wie bei A - zurück auf 20x ist das Paar nicht mehr ganz so klar im Umfeld, kann aber weiterhin gut getrennt gesehen werden
STF612 AB 8m3 8m4 16.1'' 200° 2015 Ori 04h54m16.64s +07°22'22.90"
Rene Merting
Drachhausen (Germany)
18x70 ein sehenswerter Fernglas-Doppelstern, zumindest bei 18-facher Vergrößerung - ein schön eng stehendes knapp getrenntes Pärchen zweier gleich heller Sterne
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein schickes Paar gut getrennter eng stehender Sterne - Komponente B im Süden wirkt etwas dunkler/dumpfer - das Sternpaar wirkt wie allein gelassen im Umfeld - zurück auf 20x ist die Trennung zwischen beiden Sternen ganz knapp zu erkennen
62 Eri, SHJ48 AB 5m5 8m9 66.1'' 76° 2013 Eri 04h56m24.19s -05°10'16.90"
Mark McCarthy
Fremont (California/USA)
317mm (277x) White stars, pretty wide 2 delta mag, PA to west. Did not notice Aa-Ab 0.6"
STF622 8m5 8m6 2.5'' 163° 2018 Ori 04h58m06.20s +01°40'31.60"
Rene Merting
Drachhausen (Germany)
100mm (107x) bei 107x ein ganz knapp getrenntes Pärchen in Nordsüd-Ausrichtung - beide Sterne sind gleich hell bzw. gleich schwach - schwer
★★ STF616, omega Aur, 4 Aur AB 5m0 8m2 4.7'' 2015 Aur 04h59m15.41s +37°53'24.90"
Robert Zebahl
Leipzig (Germany)
70mm (57x) Easy, still relatively tight with a large difference in brightness. Component A appeared pretty bright and white-yellowish, while B appeared only as a tiny star. Very nice sight.
Uwe Pilz
Leipzig (Germany)
105mm (88x) blau und weiß ../projects/double-stars/uwe-pilz/sketches/200111_omegaAur.jpg
Uwe Pilz
Leipzig (Germany)
105mm (144x) gelb. Schöner Helligkeitskontrast, dabei aber einfach. Auch bei 88x trennbar ../projects/double-stars/uwe-pilz/sketches/191216_4Aur.jpg
Mark McCarthy
Fremont (California/USA)
203mm (113x) Omega Aurigae. The A was a surprising sickly blue-green color, and the B was a tawny brown, nicely split 5" away.
STF623 7m0 8m7 20.5'' 207° 2018 Tau 04h59m53.75s +27°19'32.20"
Uwe Pilz
Leipzig (Germany)
105mm (88x) erkennbar bei 21x ../projects/double-stars/uwe-pilz/sketches/200215_Struve623.jpg
STT92, 5 Aur AB 6m0 9m5 4.1'' 285° 2017 Aur 05h00m18.35s +39°23'40.90"

../images/binary-star-orbits/STT92-AB-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (160x) schwierig ../projects/double-stars/uwe-pilz/sketches/5Aur.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) Nur bei sehr hoher Vergrößerung überhaupt zu trennen, schwierig ../projects/double-stars/uwe-pilz/sketches/200115stt92.jpg
STF627 AB 6m6 7m0 21.3'' 261° 2018 Ori 05h00m33.93s +03°36'56.80"
Rene Merting
Drachhausen (Germany)
18x70 zwei klar sichtbare bequem getrennte Sterne - Komponente B im SW wirkt leicht gelblicher als A - maximal 1/4 Größenklasse Helligkeitsunterschied - ein schöner nicht zu eng und nicht zu weit getrennter Fernglas-Doppelstern
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein bequem getrenntes Pärchen zweier annähernd gleich heller Sterne - Komponente B im Westen ist vielleicht eine viertel Magnitude schwächer - das Sternpaar fällt auf in der Umgebung, weil es kaum hellere Sterne im Umfeld gibt - zurück auf 20x ist es ein schickes eng stehendes Paar, aber nicht zu eng
STF630 A-BC 6m5 7m7 14.6'' 50° 2018 Ori 05h02m00.03s +01°36'31.90"
Rene Merting
Drachhausen (Germany)
18x70 schick, ein auffälliges knapp getrenntes Pärchen - Komponente B im NO ist keine ganze Größenklasse schwächer (lt. Stelle Doppie aber doch 1.21 mag)
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein knapp getrenntes Pärchen - Komponente BC im NO scheint eine knappe Größenklasse schwächer, er wirkt ein wenig bunter, matter - zurück auf 20x wirkt das Pärchen schicker, weil die beiden Komponenten dann noch enger stehen - der Helligkeitsunterschied ist nicht mehr ganz so ausgeprägt
STF636 7m1 8m5 3.7'' 104° 2017 Eri 05h03m01.95s -08°39'47.40"
Rene Merting
Drachhausen (Germany)
100mm (107x) erst bei 107x offenbart der Doppelstern seinen Begleiter östlich von Komponente A - knappe Trennung nur mit viel Konzentration erkennbar
Mark McCarthy
Fremont (California/USA)
317mm (277x) Faint, small, close pair, white and orange, 2 delta mag, PA to east. Nice tight pair but still well split.
WDK1 10m0 13m7 5.6'' 279° 2015 Cam 05h03m23.90s +53°07'42.50"
Robert Zebahl
Leipzig (Germany)
70mm (67x) The double star could not be identified at magnifications between 67x and 133x even with a finder chart.
S459, bet Cam AB 4m1 7m4 84.2'' 209° 2017 Cam 05h03m25.10s +60°26'32.20"
Rene Merting
Drachhausen (Germany)
320mm (45x) bei 45x eine wunderschöne A-Komponente, ein strahlendes Mais- Gelb - die B-Komponente weit abgesetzt im SW ist mindestens 2 Größenklassen schwächer (3.32 mag lt. Stelle Doppie), Farbeindruck weißgrau
J307 A-BC 6m8 9m3 53.4'' 320° 2018 Ori 05h03m42.85s -02°32'23.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange star, very wide B, 1 delta mag to the NNW. Did not see BC 0.3"
66 Eri, STF642 AC 5m1 10m8 52.2'' 10° 2011 Eri 05h06m45.65s -04°39'18.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright white with much fainter star to the NW, very wide split.
STF649 AB 5m8 9m0 21.3'' 69° 2017 Eri 05h08m20.18s -08°39'55.10"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x üppig getrennt - Komponente B im NO ist sehr schwach erkennbar und mindestens 2.5 Größenklassen schwächer (3.2 mag sogar lt. Stelle Doppie) - A weiß, B kommt über graubraun nicht hinaus - zurück auf 20x ist B weiterhin noch einigermaßen erkennbar, die Trennung etwas weniger üppig
Mark McCarthy
Fremont (California/USA)
317mm (277x) Yellow A, red B, ~3 delta mag, well split.
STF645 A-BC 6m0 9m1 11.3'' 29° 2017 Tau 05h09m45.06s +28°01'50.20"
Uwe Pilz
Leipzig (Germany)
105mm (88x) ../projects/double-stars/uwe-pilz/sketches/200215_Struve645.jpg
Mark McCarthy
Fremont (California/USA)
317mm (270x) White and grey, 2 delta mag, wide. BC is BU 1047 0.3" near equal, but not seen
BGH21 7m0 9m3 314.6'' 353° 2015 Tau 05h10m03.87s +27°33'23.40"
Mark McCarthy
Fremont (California/USA)
317mm (270x) Yellowish-white star, the pair the faint, very wide star seen in the scope and finder.
★★ STF644 AB 7m0 6m8 1.6'' 221° 2019 Aur 05h10m18.81s +37°18'06.70"
Robert Zebahl
Leipzig (Germany)
70mm (100x) At 57x slightly elongated with a partially visible notching. At 100x & 133x two clearly overlapping diffraction disks are visible as figure '8' with a small difference in brightness.
Robert Zebahl
Leipzig (Germany)
102mm (129x) Grand sight! Two almost touching diffraction disks, slight difference in brightness, both slightly yellowish.
Uwe Pilz
Leipzig (Germany)
105mm (200x) Beide Orange, mit schwarzem Zwischenraum. Lohnend ../projects/double-stars/uwe-pilz/sketches/200115stf644.jpg
Robert Zebahl
Leipzig (Germany)
152mm (129x) Great view, easy to separate, but still quite close together with low difference in brightness. Both components appeared slightly orange.
STF648 AB 8m1 8m9 4.7'' 62° 2019 Aur 05h10m59.19s +32°02'19.50"

../images/binary-star-orbits/STF648-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
55mm (40x) At 40x tight with obviously fainter component.
Robert Zebahl
Leipzig (Germany)
70mm (33x) Separated, but tight with noticeable difference in brightness.
Uwe Pilz
Leipzig (Germany)
105mm (144x) beide Komponenten gelb ../projects/double-stars/uwe-pilz/sketches/200111_stf648.jpg
Mark McCarthy
Fremont (California/USA)
317mm (270x) Light orange, half delta mag, wide.
STF652 6m3 7m4 1.7'' 180° 2017 Ori 05h11m45.35s +01°02'12.50"
Uwe Pilz
Leipzig (Germany)
105mm (260x) Länglich, 0“7
Mark McCarthy
Fremont (California/USA)
203mm (333x) Very nice light orange A and greenish blue B, well split ~1.5", 2 delta
STF655, iot Lep AB 4m5 9m9 12.0'' 337° 1998 Ori 05h12m17.89s -11°52'08.90"
Rene Merting
Drachhausen (Germany)
100mm (32x) hier habe ich mich täuschen lassen von einem weiter entfernt stehenden Stern nordöstlich, den ich für die B-Komponente gehalten habe - bei 32x und bei 64x konnte ich den im Nachgang recherchierten wesentlich schwächeren Begleiter in nur 12" Abstand allerdings nicht ausmachen
STF661, kappa Lep 4m4 6m8 2.2'' 357° 2008 Lep 05h13m13.87s -12°56'26.40"
Mark McCarthy
Fremont (California/USA)
371mm (553x) ~3-4 delta mag! ~1.5-2”, B in A’s diffraction.
STF654, rho Ori AB 4m6 8m5 6.4'' 65° 2018 Ori 05h13m17.48s +02°51'40.50"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Rho Ori Bright light orange-yellow A star with 3 delta mag yellow-white B, ~5"
STT517 AB 6m8 7m0 0.7'' 241° 2018 Ori 05h13m31.55s +01°58'03.70"

../images/binary-star-orbits/STT517-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (333x) Consistently split but images are bloated by poor seeing, yellowish white stars, <1", near equal
STF668, 19 Ori, beta Ori, Rigel A-BC 0m3 6m8 9.7'' 202° 2017 Ori 05h14m32.27s -08°12'05.90"
Robert Zebahl
Leipzig (Germany)
55mm (83x) The second component was immediately seen as faint companion. ../projects/double-stars/robert-zebahl/sketches/2019-01-21_stf668.jpg
Robert Zebahl
Leipzig (Germany)
70mm (67x) First attempt at 133x: much fainter component clearly visible as a tiny star at a relatively large distance. After that the visibility was easy even at 67x. At 44x the faint component could only be guessed.
Robert Zebahl
Leipzig (Germany)
102mm (160x) Much fainter companion immediately visible as tiny star far outside the diffraction pattern of the primary component.
Uwe Pilz
Leipzig (Germany)
105mm (288x) zwei Ringe und zahlreiche radiale Strahlen um den Hauptstern ../projects/double-stars/uwe-pilz/sketches/Rigel.jpg
STF667 7m2 8m8 4.2'' 316° 2018 Ori 05h14m41.31s -07°04'18.10"
Rene Merting
Drachhausen (Germany)
100mm (107x) bei 64x stehen beide Sterne noch eng aneinander - ein Phänomen, Komponente A im SO ist nicht richtig weiß, die 1.5 mag schwächere Komponente B wirkt dagegen weiß, also trotz großem Helligkeitsunterschied sauberer weiß - erst bei 107x gelingt mir die sichere Trennung, kein Wunder bei dem schlechten Seeing heute
Mark McCarthy
Fremont (California/USA)
371mm (553x) Pretty orange A and 2x fainter B, which is a little blue-orange. 5”
Mark McCarthy
Fremont (California/USA)
508mm (533x) Orange and yellowish-blue B, ~5", 2 delta mag
STF664 7m8 8m4 4.8'' 177° 2019 Ori 05h15m10.54s +08°25'56.80"
Robert Zebahl
Leipzig (Germany)
70mm (100x) At 44x barely split. At 100x easily split with obvious difference in brightness.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Near equal, well split, "headlights in fog" pair. Slightly yellow
BVD51 7m8 9m6 44.5'' 317° 2016 Ori 05h15m23.69s -03°21'57.40"
Mark McCarthy
Fremont (California/USA)
371mm (270x) Wide, 2 delta mag pair, A star is slightly red.
★★ STF653, 14 Aur AB 5m0 10m9 9.8'' 11° 2014 Aur 05h15m24.39s +32°41'15.30"
AC 5m0 7m3 14.2'' 225° 2017
AD 5m0 10m8 179.7'' 322° 2010
Uwe Pilz
Leipzig (Germany)
105mm (88x) AC: heller Stern gelblich weiß ../projects/double-stars/uwe-pilz/sketches/200111_14Aur.jpg
Mark McCarthy
Fremont (California/USA)
317mm (270x) AB: Triple, one of which is one delta mag fainter than the other equal pair. All well separated. [AC is the brighter pair, AB fainter.]
Mark McCarthy
Fremont (California/USA)
317mm (270x) AC: Triple, one of which is one delta mag fainter than the other equal pair. All well separated. [AC is the brighter pair, AB fainter.]
A2638 9m2 9m4 1.0'' 280° 2017 Ori 05h15m52.51s +03°44'55.70"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Tough pair in these conditions, moon haze. Slightly unequal and very close, resolves with seeing to two distinct faint points, but a haze around them
BU318 8m8 8m3 0.6'' 264° 2017 Ori 05h16m14.58s -03°28'59.10"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Elongation, certainly a pair, but not resolved
STF666 7m8 7m9 3.2'' 75° 2019 Aur 05h17m05.80s +33°19'47.20"
Robert Zebahl
Leipzig (Germany)
55mm (83x) At 40x slightly elongated, at 38x separated, but tight. Overall faint with components of similar brightness.
Robert Zebahl
Leipzig (Germany)
70mm (57x) Split, no difference in brightness and color. Very nice!
S473 7m0 8m5 20.6'' 307° 2018 Lep 05h17m35.50s -15°13'10.50"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x leicht - Komponente A im SO zeigt sich gut getrennt von B im NW - Helligkeitsunterschied gut 1.5 bis 2 Größenklassen, dadurch leichter Farbkontrast - zurück auf 20x sind beide Sterne auch noch getrennt erkennbar, nun natürlich sehr eng stehend
STF678 AB 9m1 9m4 3.6'' 104° 2018 Ori 05h17m39.01s +04°41'01.80"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Nice pair, near equal, pretty wide, nice view with seeing
A2639 8m6 9m7 0.8'' 277° 2017 Ori 05h18m03.50s +03°41'30.40"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Light white-yellow and 2 delta mag B, ~0.8"
STF669 8m4 9m0 9.9'' 278° 2015 Aur 05h18m56.78s +45°14'51.40"
Robert Zebahl
Leipzig (Germany)
55mm (25x) Well separated with visible difference in brightness.
S476 AB 6m3 6m5 39.3'' 19° 2018 Lep 05h19m17.44s -18°31'11.80"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x adäquat getrennt, zwei gleich helle weiße Sterne - sehr auffällig im Umfeld - zurück auf 20x noch besserer Pärcheneindruck, knappe Trennung
STF688 7m5 7m5 10.7'' 95° 2015 Ori 05h19m20.88s -10°44'49.90"
Robert Zebahl
Leipzig (Germany)
70mm (44x) Clearly split with decent angular distance. Components appeared nearly equally bright.
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein schön anzusehendes enges Pärchen - zwei unschuldig gleich helle weiß schimmernde Sterne in Ost-West-Ausrichtung - zurück auf 20x berühren sich die beiden Kügelchen hauchzart
STF692 AB-C 7m6 8m6 34.8'' 2017 Ori 05h20m24.16s -08°01'47.00"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x weit getrennt, Komponente AB im Süden ist knapp eine Größenklasse heller - AB weiß, C braungrau - das Paar ist auffällig, da es kaum vergleichbar helle Sterne im direkten Umfeld gibt - zurück auf 20x sind beide Sterne weiterhin ordentlich getrennt erkennbar, C wirkt jetzt nur noch grau, AB leicht gelblich
BU189 AB 6m4 9m8 4.6'' 285° 2002 Ori 05h20m26.41s -05°22'03.10"
Mark McCarthy
Fremont (California/USA)
371mm (553x) With good seeing and averted vision a 3x fainter point comes into view, can barely hold it, ~5”.
STF681 AB 6m6 9m2 23.3'' 183° 2017 Aur 05h20m39.16s +46°57'49.60"
Uwe Pilz
Leipzig (Germany)
105mm (88x) orange ../projects/double-stars/uwe-pilz/sketches/191216stf681.jpg
KU87 AB 7m8 10m0 35.9'' 104° 2015 Tau 05h21m39.91s +18°54'24.50"
Rene Merting
Drachhausen (Germany)
18x70 eine echte Herausforderung - Komponente B taucht mit etwas Konzentration ganz schwach östlich von A auf - Komponente A ist schon relativ schwach, B ist schätzungsweise 2 Größenklassen schwächer
STT105 8m6 8m6 0.2'' 122° 2000 Ori 05h21m40.47s +12°40'06.20"
Mark McCarthy
Fremont (California/USA)
317mm (277x) very widely separated (11") orange pair. Pretty bright (7.3, 8.3).
STF684 7m7 9m3 1.5'' 141° 2016 Aur 05h22m11.04s +45°04'53.90"
Mark McCarthy
Fremont (California/USA)
317mm (270x) Fine white and yellow, 2-3" at this scale, 2 delta mag. 20,000 light years distant, is actually quite a large distance for the average double star
STT106 AB 7m1 10m1 9.5'' 40° 2015 Ori 05h22m11.20s +05°23'43.10"
Mark McCarthy
Fremont (California/USA)
508mm (533x) ~4 delta mag B, wide, ivory color
STF696, 23 Ori 5m0 6m8 31.9'' 30° 2018 Ori 05h22m50.00s +03°32'40.00"
Rene Merting
Drachhausen (Germany)
18x70 ein auffälliges gut getrenntes Paar - Komponente B im Norden ist 1.5 Größenklassen schwächer
HU1225 7m8 11m0 3.4'' 320° 1991 Ori 05h22m56.87s +14°21'40.00"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Visible with 20" only, the B star is too faint for the 8" in these conditions. A is light orange, B a deeper orange compared with A, 4 delta mag and ~3.5"
STF700, V1804 Ori 7m7 7m9 4.8'' 2017 Ori 05h23m05.54s +01°03'24.70"
Robert Zebahl
Leipzig (Germany)
70mm (44x) At 44x split, but very close together. At 100x clearly split with nearly equally bright components.
Mark McCarthy
Fremont (California/USA)
508mm (533x) V1804 Ori. Near equal white pretty wide
STT104 7m0 11m1 21.4'' 190° 2014 Aur 05h23m12.61s +47°01'17.90"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Very wide separation (208"!) orange pair.
STF701 6m1 8m1 6.2'' 139° 2018 Ori 05h23m18.50s -08°24'55.90"
Rene Merting
Drachhausen (Germany)
100mm (107x) bei 107x ploppt südöstlich leicht abgesetzt von A die B-Komponente auf - A leuchtet weiß, B ist schwer zu sehen, also ohne Farbe
Mark McCarthy
Fremont (California/USA)
371mm (553x) White and rusty red color, ~6”, 1 delta mag.
STF697 AB 7m3 8m1 25.9'' 286° 2015 Ori 05h23m31.74s +16°02'25.80"
Rene Merting
Drachhausen (Germany)
18x70 ein ordentlich getrenntes Pärchen - Komponente A strahlt weißgelblich, B im NW ist etwas mehr als eine halbe Größenklasse schwächer und wirkt kupfergrau
★★★ WNC2 A-BC 6m9 7m0 3.3'' 158° 2018 Ori 05h23m51.32s -00°51'59.80"

../images/binary-star-orbits/WNC2-A-BC-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (44x) Double star appeared elongated.
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 64x ein extrem eng stehendes wunderschönes Pärchen zweier gleich heller gelber Sterne - keine 8 mehr, beide sind schon getrennt - bei 107x kommt etwas mehr Luft zwischen beide, aber sie scheinen auch ein wenig Farbe zu verlieren
Robert Zebahl
Leipzig (Germany)
120mm (150x) Clearly split with nearly equally bright components.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Nice near equal, light yellow-white stars, well split. nice pair [BC is A 847 7.67/7.84 0.3" and could have been gotten on a better night!]
Mark McCarthy
Fremont (California/USA)
508mm (533x) Easy and obvious pair, bright 7th mag stars ~3". [This was a first try at the short period list but I missed the object, which is A 847 BC, 7.67/7.84 0.3" -- need to try again.]
STF702 9m6 10m1 8.3'' 80° 2017 Ori 05h24m17.61s +02°22'04.60"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Wide, bluish for faintness, probably not physical [not physical]
ES576 AC 8m1 8m9 42.7'' 237° 2015 Aur 05h24m22.85s +42°36'37.00"
Mark McCarthy
Fremont (California/USA)
317mm (270x) Pretty finder split. In scope white stars, near equal to 0.5 delta mag.
DA5, eta Ori AB 3m6 4m9 1.8'' 77° 2018 Ori 05h24m28.62s -02°23'49.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Split is 1 disk separation, PA to E-W, and delta mag is 0.5-1.
A2703 8m4 9m0 0.2'' 90° 1995 Ori 05h24m33.14s +09°10'15.10"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Definite notch at best moments, slight magnitude difference, tough
S479 AB 8m3 8m9 46.4'' 220° 2014 Ori 05h24m38.61s +01°48'38.80"
Rene Merting
Drachhausen (Germany)
18x70 beide Komponenten stehen südwestlich vom hellen 25 Ori wie an einer Kette gezogen - die Trennung der Komponenten dieses Doppelsterns beträgt 1/3 Abstand 25 Ori zu Komponente A
HU1226 9m8 9m8 0.7'' 55° 2016 Ori 05h25m05.57s +15°21'44.00"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Suspected at 333x but a bit too fuzzy. Nice very clean split at 533x, slightly orange stars, near equal
STF708 7m7 8m9 2.8'' 321° 2017 Ori 05h25m11.28s +01°55'26.10"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Resolves only with seeing, fuzzy otherwise, about 2 delta mag and ~2"
STF698 AB 6m7 8m3 31.3'' 348° 2018 Aur 05h25m12.94s +34°51'18.60"
Robert Zebahl
Leipzig (Germany)
102mm (62x) Beautiful double star, easy to separate and quite striking. Primary component appeared in clear orange, the companion was too faint to identify the color.
Uwe Pilz
Leipzig (Germany)
105mm (88x) rot-orange und blaugrau, lohnend ../projects/double-stars/uwe-pilz/sketches/200111_stf698.jpg
Robert Zebahl
Leipzig (Germany)
152mm (22x) Easy with a attractive separation and a clear difference in brightness. A: pale yellow; B: creamy white with a touch of blue. At 49x the color impression was a bit more intense. Located in beautiful field of stars.
Mark McCarthy
Fremont (California/USA)
317mm (270x) Orange-yellow A and lilac B, wide, finder split, 1 delta mag. Pretty.
A848 6m9 7m9 0.3'' 179° 2016 Ori 05h25m31.08s -00°32'38.20"

../images/binary-star-orbits/A848-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (533x) Suspect elongation at 333x, at 533x I get a snowman, very definite with seeing. White stars, noticeable mag difference
STF699 AB 7m9 8m6 8.9'' 346° 2018 Aur 05h25m38.50s +38°02'41.10"
Robert Zebahl
Leipzig (Germany)
55mm (25x) Well separated with slightly fainter companion.
Robert Zebahl
Leipzig (Germany)
70mm (22x) Separated at 22x, but still a relatively tight pair with a moderate difference in brightness. Together with sigma Aur in one field of view. Overall rather dim double star. At 57x very nice view! A: pale orange, B: slightly blueish
Uwe Pilz
Leipzig (Germany)
105mm (88x) schwach, aber lohnend. Orange und blau ../projects/double-stars/uwe-pilz/sketches/191216stf699.jpg
Mark McCarthy
Fremont (California/USA)
317mm (270x) Wide yellow and blue-white, half delta mag.
HJ3759 5m9 7m3 26.7'' 318° 2018 Lep 05h25m59.82s -19°41'43.40"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x zeigt sich ein bequem getrenntes Farbkontrastpärchen - Komponente A wirkt gelblich, die gut 1.5 Magnituden schwächere Komponente B im NW wirkt grauweiß
J589 11m9 12m2 5.0'' 193° 2015 Ori 05h26m28.22s +14°55'45.20"
Mark McCarthy
Fremont (California/USA)
508mm (533x) I thought this would be harder since they are faint but they're an easy, wide light blue star pair, near equal
STF712 AB 6m7 8m6 3.2'' 66° 2017 Ori 05h26m31.22s +02°56'09.30"
Rene Merting
Drachhausen (Germany)
100mm (107x) bei 107x wird Komponente B ganz knapp getrennt östlich von A sichtbar und bestimmt zwei Größenklassen schwächer - kurios, trotz des großen Helligkeitsunterschiedes strahlt B genauso schön reinweiß wie A
Mark McCarthy
Fremont (California/USA)
203mm (333x) More than 1 delta mag, light off-white A and slightly blue B, wide
BRT1181 11m2 11m3 3.5'' 354° 2015 Ori 05h26m47.03s +14°40'52.30"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Easy pair, light blue stars, half delta mag, wide ~3.5" [not physical]
TDS3201 9m5 9m7 0.4'' 237° 1991 Ori 05h27m40.03s +14°08'08.40"
Mark McCarthy
Fremont (California/USA)
508mm (533x) super fine but split, more than half delta mag, fine focus needed to remove any glare. What a nice pair, ice blue color stars
STF716, 118 Tau AB 5m8 6m7 4.9'' 209° 2019 Tau 05h29m16.49s +25°09'01.10"
Robert Zebahl
Leipzig (Germany)
70mm (33x) At 33x very tight with visible difference in brightness. At 47x very nice view. Both components appeared white.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Equal white widely separated.
GUI7 AD 7m1 11m2 149.8'' 147° 2014 Ori 05h29m33.52s +03°08'52.50"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x etwas weiter südöstlich von A-BC (STF721) ist Komponente D ganz schwach in vierfachem Abstand von A-BC erkennbar
STF721 A-BC 7m1 9m1 25.3'' 149° 2014 Ori 05h29m33.52s +03°08'52.50"
Rene Merting
Drachhausen (Germany)
18x70 Komponente BC ist ganz schwach südöstlich von A erkennbar - BC ist irgendwie kein richtig klarer Lichtpunkt, aber er ist eben knapp getrennt von A zu erkennen
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein schön isoliert stehendes weit getrenntes Doppelsternpärchen - Komponente BC im SO ist mehr als eineinhalb Größenklassen schwächer und strahlt grauweiß - etwas weiter südöstlich ist ein weiterer ganz schwacher Stern in vierfachem Abstand von A-BC erkennbar (separate Bezeichnung GUI7, Komponente D, 11.2 mag) - zurück auf 20x ist STF721 noch gut sichtbar, auf BC muss man sich ein wenig mehr konzentrieren
HU217, LY Aur 7m2 8m3 0.7'' 254° 2015 Aur 05h29m42.65s +35°22'30.10"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) nicht als DS gesehen
STF725, 31 Ori 4m7 9m7 13.0'' 88° 2013 Ori 05h29m43.98s -01°05'31.80"
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 32x ist nur Komponente A goldgelb leuchtend erkennbar, Komponente B wird erst sichtbar bei 64x, der Stern zeigt sich ganz schwach östlich von A, die Trennung ist ordentlich - ohne das Wissen um den Doppelstern hätte ich ihn nie als solchen erkannt
Mark McCarthy
Fremont (California/USA)
203mm (333x) 31 Ori Large mag difference but since is wide separation it is easier to see. Bluish B vs bright light orange A
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright orange and very faint blue B, 3 delta mag, pretty wide.
HU1228 9m8 9m8 0.3'' 16° 2007 Ori 05h29m48.07s +13°34'57.30"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Snowman overlapping disks at best moments, one second out of ten. Slightly orange stars and slight mag difference
★★ STF719 AB 7m5 8m8 1.4'' 336° 2016 Aur 05h30m06.14s +29°32'55.30"
AC 7m5 9m4 15.2'' 353° 2016
Robert Zebahl
Leipzig (Germany)
70mm (22x) AC: At 22x clearly visible difference in brightness at moderate separation. The companion appears only as a dim star. At 57x the color contrast is also quite noticeable. A: light orange, C: silvery blue
Robert Zebahl
Leipzig (Germany)
102mm (62x) AC: Easy with a rather dim companion. The color seemed a bit more intense than in the 6-inch refractor. A: lovely pale orange; B: grey-blueish.
Uwe Pilz
Leipzig (Germany)
105mm (200x) AC: der helle Stern ist weiß. ../projects/double-stars/uwe-pilz/sketches/200111_stf719.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) AB waren schwieriger, als es die Daten vermuten ließen. C ist schwach und erforderte indirektes Sehen ../projects/double-stars/uwe-pilz/sketches/200117stf719.jpg
Robert Zebahl
Leipzig (Germany)
152mm (49x) AC: Easy to separate with a significant difference in brightness. A appeared in bright orange, B appeared greyish-blue.
Robert Zebahl
Leipzig (Germany)
152mm (129x) AB: At 129x clearly elongated. Difference in brightness visible. The seeing was mediocre (3/5), so that the diffraction disks were only occasionally visible. At 180x no better.
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB: widely separated with an orange A and bluish B
STTA63 6m5 7m7 75.2'' 277° 2017 Aur 05h30m45.08s +39°49'33.30"
Robert Zebahl
Leipzig (Germany)
70mm (22x) At 22x widely separated, visible difference in brightness. Slight difference in color: white-yellowish (at 44x light orange), slightly orange.
STF728, 32 Ori 4m4 5m8 1.3'' 44° 2017 Ori 05h30m47.06s +05°56'53.30"

../images/binary-star-orbits/STF728-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (288x) sauber getrennt, Beugungsscheiben berühren sich gerade ../projects/double-stars/uwe-pilz/sketches/32Ori.jpg
Mark McCarthy
Fremont (California/USA)
203mm (333x) 32 Ori White and off white pair, 1.5 delta mag, ~1.5". Nice and very clean with seeing
STF726 7m9 8m6 1.2'' 264° 2016 Ori 05h30m51.75s +10°15'15.70"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Very nice, unequal, ~1", 1 delta mag, very fine
STF729, 33 Ori AB 5m7 6m7 1.8'' 26° 2017 Ori 05h31m14.53s +03°17'31.70"
Uwe Pilz
Leipzig (Germany)
105mm (180x) Begleiter etwas außerhalb des ersten Rings
delta Ori, Mintaka BU558 AB 2m4 14m2 33.4'' 229° 2016 Ori 05h32m00.40s -00°17'56.70"
STFA14 AC 2m4 6m8 56.2'' 2017
Rene Merting
Drachhausen (Germany)
10x50 AC: Komponente C zeigt sich gut abgesetzt im NW von A - Helligkeitsunterschied enorm, mindestens 3 Größenklassen
Rene Merting
Drachhausen (Germany)
18x70 AC: total leicht - Komponente C thront gut getrennt nördlich über A (Mintaka) und ist gut 2 bis 3 Größenklassen schwächer (sogar 4.42 mag laut Stelle Doppie) und trotzdem noch ein mittelheller Stern - A ist gleißend weiß, C weißgrau
Uwe Pilz
Leipzig (Germany)
105mm (200x) AC: sehr weit in reichem Sternfeld ../projects/double-stars/uwe-pilz/sketches/Mintaka.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) AC: reinweiß-violett
Mark McCarthy
Fremont (California/USA)
317mm (553x) AC: Bright, 2 delta mag, very wide.
STF730 AB 6m1 6m4 9.7'' 142° 2018 Tau 05h32m14.14s +17°03'29.30"
Christopher Hay
Seeheim (Germany)
15x45 Momentary split, coming and going, a fascinating sight. Quite white, nice together with Ruby Star 119 Tau in 4.5° FOV, and to southwest the fine star field of Collinder 65
Robert Zebahl
Leipzig (Germany)
70mm (22x) At 22x beautiful sight, easy to separate with little difference in brightness. A appeared slightly yellowish. At 57x moderate, but still very nice color contrast: A yellowish, B rather white.
STF718 AB 7m5 7m5 7.7'' 73° 2015 Aur 05h32m20.59s +49°23'36.50"
Robert Zebahl
Leipzig (Germany)
55mm (25x) Easy to split with similarly bright components. Nive view.
BU1048 5m3 9m8 2.2'' 355° 2015 Ori 05h32m41.35s -01°35'30.60"
Rene Merting
Drachhausen (Germany)
100mm (107x) bei 107x zeigt sich Komponente B nur in ruhigen Momenten ganz schwach nördlich von A - Komponente A ist schön weiß, B kommt aufgrund des großen nicht abschätzbaren Helligkeitsunterschiedes ohne Farbe aus
STF734 AB 6m7 8m2 1.6'' 355° 2017 Ori 05h33m07.35s -01°43'02.50"
AC 6m7 8m3 29.3'' 244° 2014
Rene Merting
Drachhausen (Germany)
100mm (20x) AC: bei 32x sind beide Komponenten weit getrennt voneinander erkennbar - Komponente C im Westen ist gut 1.5 Magnituden schwächer - zurück auf 20x geben die beiden ein schönes schwaches Pärchen ab, Komponente A ist deutlich heller und es zeigt sich ein schöner Farbkontrast zwischen beiden Sternen - der DS selbst ist eher unauffällig im Sternumfeld
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Very close pair, delta mag 1, PA to north.
STF745 AB 8m2 9m3 28.7'' 347° 2014 Ori 05h34m49.12s -06°00'22.90"
AC 8m2 10m4 97.1'' 304° 2014
BC 9m3 10m4 78.4'' 290° 2015
Rene Merting
Drachhausen (Germany)
100mm (20x) AB: bei 32x interessantes Doppelstern-Paar zusammen mit dem dicht stehenden STF747, der knallig hell daher kommt - Komponente A von STF745 ist noch deutlich schwächer, als die B-Komponente von STF747 - zurück auf 20x sind beide Komponenten schwach erkennbar und knapp getrennt
AC: bei 32x ist Komponente C nordwestlich von A in 2,5-facher Entfernung von AB leicht nach Westen abgeknickt zu erkennen
STF747 AB 4m7 5m5 36.0'' 225° 2018 Ori 05h35m02.68s -06°00'07.20"
Rene Merting
Drachhausen (Germany)
8x30 zwei helle Sterne knapp getrennt, Komponente B im Südwesten nur knapp schwächer
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x zeigt sich B südwestlich von A gut eine halbe Größenklasse schwächer - B wirkt ein wenig kühler, bläulicher - zurück auf 20x, weiterhin leichte Trennung und Sichtbarkeit
STF738, lam Ori AB 3m5 5m5 4.3'' 44° 2019 Ori 05h35m08.28s +09°56'03.00"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Meissa. White pair, 2 delta mag, ~5". Bright clean white [not physical]
DA4, 42 Ori AB 4m6 7m5 1.2'' 202° 2018 Ori 05h35m23.16s -04°50'18.10"
Uwe Pilz
Leipzig (Germany)
105mm (260x) Unregelmäßigkeit im ersten Ring, nicht eindeutig
STF752, 44 Ori, iota Ori, Nair Al Saif, Hatysa AB 2m8 7m7 11.4'' 142° 2017 Ori 05h35m25.98s -05°54'35.60"
AC 2m8 9m8 49.4'' 103° 2002
BC 7m7 9m8 41.1'' 94° 2015
Rene Merting
Drachhausen (Germany)
100mm (32x) AB: bei 64x tritt Komponente B gut getrennt aus dem Glanz von Komponente A hervor - mindestens 3 Magnituden Helligkeitsunterschied - A leicht gelblich, B braunorange - zurück auf 32x ist B in guten Momenten ganz knapp getrennt von A erkennbar
AC: bei 64x zeigt sich Komponente C südöstlich von A - der Abstand von AC ist gut 4 bis 5x so groß wie Abstand AB - C ist dabei nochmal deutlich schwächer als B - zurück auf 32x ist C auch zu erkennen
STF750 6m4 8m4 4.2'' 60° 2018 Ori 05h35m31.07s -04°21'50.60"
Rene Merting
Drachhausen (Germany)
100mm (107x) bei 107x präsentieren sich beide Komponenten knapp getrennt - B im Osten ist sehr schwach, gut 2 Magnituden schwächer als A
Uwe Pilz
Leipzig (Germany)
105mm (192x) mit 60mm trennbar
XMI9 7m9 9m7 30.1'' 60° 2015 Tau 05h35m44.56s +18°45'29.30"
Rene Merting
Drachhausen (Germany)
18x70 eine echte Herausforderung - Komponente B taucht mit etwas Konzentration ganz schwach östlich von A auf, der Abstand ist ordentlich - B ist schätzungsweise 1.5 bis 2 Größenklassen schwächer - Komponente A strahlt schneeweiß, B wirkt wegen des Helligkeitsunterschiedes grau
STF751 8m0 9m0 15.1'' 123° 2015 Ori 05h35m48.03s -00°59'12.80"
Rene Merting
Drachhausen (Germany)
18x70 mit etwas Geduld ist ein ganz knapp getrenntes schwaches Pärchen erkennbar - Komponente B im SO von A ist vielleicht eine dreiviertel Größenklasse schwächer
STF742 7m1 7m5 4.2'' 275° 2019 Tau 05h36m26.38s +21°59'35.10"

Located about 0.5 degree east of Messier 1.

../images/binary-star-orbits/STF742-orbit.jpg

Robert Zebahl
Leipzig (Germany)
102mm (62x) Beautifully separated, relatively tight with well visible difference in brightness. Points directly toward Messier 1 and can be observed with it in one field of view. Very nice!
Robert Zebahl
Leipzig (Germany)
120mm (48x) Nice, evident double near Messier 1. Easy to split with almost equally bright components.
Robert Zebahl
Leipzig (Germany)
152mm (69x) At 49x just so, at 69x easily separable. The fainter component appeared a little warmer in terms of color. Great view together with Messier 1 in the field of view.
Robert Zebahl
Leipzig (Germany)
200mm (80x) Nice double star with nearly equally bright components.
STF754 5m7 9m2 5.3'' 288° 2002 Ori 05h36m35.69s -06°03'53.10"
Rene Merting
Drachhausen (Germany)
100mm (107x) bei 107x zeigt sich Komponente B als kleine angeklebte Murmel westlich von A - höher vergrößern hat Seeing-technisch in dieser Nacht nichts mehr gebracht
STF736 7m5 8m6 2.7'' 2019 Aur 05h37m07.20s +41°49'41.70"
Robert Zebahl
Leipzig (Germany)
70mm (57x) At 57x split with almost no space in between. At 100x clearly split with noticeable fainter component.
STF749 AB 6m5 6m5 1.1'' 319° 2017 Tau 05h37m08.84s +26°55'28.30"
AC 6m5 10m5 181.6'' 299° 2011

../images/binary-star-orbits/STF749-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (133x) AB: I had the impression that in the correct position angle, without knowing that angle during observation, a minimal elongation could be detected. But observation is borderline and too doubtful.
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB: Hair-split, equal brightness white stars. Nice.
★★ STF757 AB 8m0 8m3 1.5'' 242° 2018 Ori 05h38m06.52s -00°11'03.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty double-double system. AB is close ~1.5" near equal 8th magnitude stars. A-AC widely separated near equal to the east. AD also to the east about 10" separated from A-AC
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty double-double system. AB is close ~1.5" near equal 8th magnitude stars. A-AC widely separated near equal to the east. AD also to the east about 10" separated from A-AC
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty double-double system. AB is close ~1.5" near equal 8th magnitude stars. A-AC widely separated near equal to the east. AD also to the east about 10" separated from A-AC
★★ STF761 AB 7m9 8m4 68.1'' 202° 2016 Ori 05h38m36.54s -02°33'12.70"
AC 7m9 8m6 72.1'' 209° 2016
AD 7m9 11m8 32.7'' 308° 2016
BC 8m4 8m6 8.5'' 269° 2015
Rene Merting
Drachhausen (Germany)
100mm (32x) A-BC: bei 32x stehen südlich von Komponente A in ordentlichem Abstand die Komponenten B (und C)
BC: bei 32x sehe ich zwei dicht zusammen stehende gleich schwache Sterne, knapp getrennt
26 Aur, STF753 AB-C 5m5 8m4 12.0'' 269° 2013 Aur 05h38m38.10s +30°29'32.80"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Separable at 22x, but quite close together and pretty uneven. Primary component appeared in bright orange. At 57x easy to separate. The faint companion appeared silvery-blue.
Uwe Pilz
Leipzig (Germany)
105mm (88x) heller Stern blauweiß ../projects/double-stars/uwe-pilz/sketches/200215_26Aur.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) Bright yellow A and a fainter yellow white B.
★★★ sigma Ori, 48 Ori, STF762, STF3135, BU1032 BU1032 AB 4m1 5m3 0.3'' 77° 2015 Ori 05h38m44.77s -02°36'00.20"
STF762 AB-C 3m8 8m8 11.6'' 237° 2016
STF762 AB-D 3m8 6m6 12.9'' 84° 2018
STF762 AB-E 3m8 6m3 41.5'' 62° 2018
STF762 DC 6m6 8m8 23.7'' 253° 2018
STF762 EC 6m3 8m8 52.9'' 241° 2018
STF762 ED 6m3 6m6 29.9'' 233° 2018
STF3135 AB-F 3m8 7m9 208.0'' 324° 2016
Rene Merting
Drachhausen (Germany)
100mm (64x) AB-C: bei 64x zeigt sich Komponente C ganz schwach südwestlich von AB
AB-D: bei 32x schließt sich an die zartgelbe Komponente AB unmittelbar im Osten dicht stehend D weißorange an - ein schickes Trio zusammen mit E weiter östlich
AB-E: bei 32x zeigt sich in vierfacher Entfernung von AB-D die Komponente E weiter östlich in einer Linie - E ist ähnlich hell wie D
Sarah Gebauer
Germany
150mm (125x) ein sehr schönes Muster des Mehrfachsystems, auch wenn längst nicht alle Komponenten getrennt zu sehen waren, AB-C, AB-D und AB-E getrennt, A und B nicht ../projects/double-stars/sarah-gebauer/sketches/20200409%20Sigma%20Ori%20DSk.jpg
Uwe Pilz
Leipzig (Germany)
320mm (80x) AB-C-D schon im Aufsuchokular sichtbar. Sehr lebhafte Farben, einer der schönsten Mehrfachsterne überhaupt. Im selben Feld mit STF791 ../projects/double-stars/uwe-pilz/sketches/200212sigmaOri.jpg
HDO77 AB 6m9 7m9 10.9'' 124° 2017 Lep 05h39m44.71s -20°26'06.70"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein schickes enges Sternpaar, knapp getrennt - leichter Farbkontrast, Komponente B im SO ist orangebraun, A dagegen ist doppelt so hell und strahlt weiß
STF774, zeta Ori, 50 Ori, Alnitak AB 1m9 3m7 2.4'' 167° 2017 Ori 05h40m45.52s -01°56'33.30"

../images/binary-star-orbits/STF774-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (128x) Big difference in brightness. I could see the fainter component near the first ring of the Airy pattern of the brighter component.
Uwe Pilz
Leipzig (Germany)
105mm (288x) sauber getrennt, Beugungsscheiben berühren sich gerade ../projects/double-stars/uwe-pilz/sketches/Alnitak.jpg
Mark McCarthy
Fremont (California/USA)
203mm (333x) Alnitak. Easy, 2 delta mag,~2", white
Mark McCarthy
Fremont (California/USA)
317mm (207x) about 2" and 1.5 delta mag.
STF774, zet Ori AC 1m9 9m6 58.5'' 10° 2017 Ori 05h40m45.52s -01°56'33.30"
Mark McCarthy
Fremont (California/USA)
317mm (207x) Alnitak:AC is a very faint star widely separated outside of the main star's glare.
★★★ STF764 6m4 7m1 25.6'' 14° 2017 Aur 05h41m20.98s +29°29'14.70"
Robert Zebahl
Leipzig (Germany)
55mm (25x) Easy to split with large distance and noticeable difference in brightness.
Robert Zebahl
Leipzig (Germany)
70mm (22x) Very easy and bright, pretty wide apart with a small difference in brightness; whitish and slightly yellowish. A nice double star for binoculars.
Uwe Pilz
Leipzig (Germany)
105mm (88x) blauweiß und orange, kleiner aber gut sichtbarer Helligkeitsunterschied. Schon bei 21x sichtbar, sehr lohnend. ../projects/double-stars/uwe-pilz/sketches/200117stf764.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) two bright whites widely separated
STF778 8m4 10m1 3.5'' 186° 2015 Aur 05h44m05.16s +30°56'01.80"
Mark McCarthy
Fremont (California/USA)
317mm (277x) double squeezed into the FOV with STF 789 at 277x, AB is a widely separated 4 delta mag pair
Mark McCarthy
Fremont (California/USA)
317mm (277x) double squeezed into the FOV with STF 789 at 277x, AC is a widely separated 4 delta mag pair, same brightness as B
H6 40, gam Lep AB 3m6 6m3 97.4'' 350° 2015 Lep 05h44m27.79s -22°26'54.20"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x wunderschön - Komponente A strahlt gleißend gelb, Komponente B extrem weit im NNW ist gut 2 Größenklassen schwächer - viele schwächere Sterne im unmittelbaren Umfeld, sie gehören aber nicht mit zum System
STF783 8m1 9m7 8.3'' 2015 Aur 05h44m37.74s +29°00'59.70"
Uwe Pilz
Leipzig (Germany)
105mm (288x) schwierig, weil schwach. Heller Stern gelblich ../projects/double-stars/uwe-pilz/sketches/200117stf783.jpg
STF789 AB 6m1 10m2 14.0'' 150° 2017 Ori 05h45m01.80s +04°00'29.30"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Wide, 3 delta mag, ~15", B looks blue. [did not notice BC, A 2655, 13.7 mag B 1.1"]
Mark McCarthy
Fremont (California/USA)
317mm (277x) Widely separated 4 delta mag pair, in same FOV as STF 778
BU560 7m8 8m2 1.7'' 124° 2019 Aur 05h47m24.87s +29°39'26.90"

../images/binary-star-orbits/BU560-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (100x) Clearly visible as a double star with overlapping diffraction disks (figure '8') and small difference in brightness.
Robert Zebahl
Leipzig (Germany)
152mm (129x) Separated with very little difference in brightness, relatively tight. Overall easy.
STT119 8m1 8m9 0.7'' 355° 2009 Ori 05h47m54.88s +07°57'37.50"

../images/binary-star-orbits/STT119-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (333x) Suspect elongations with 8" 533x & 20" 533x, but image not good enough. But I got a nice clean split with apodizing mask, nearly perfrect disks. Orange stars well split, <1", about 1 delta mag
STF795, 52 Ori 6m0 6m0 1.0'' 220° 2017 Ori 05h48m00.21s +06°27'14.50"

../images/binary-star-orbits/STF795-orbit.jpg

Sarah Gebauer
Germany
150mm (125x) bei 125x und 250x nicht getrennt im April 2020
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright white, near equal magnitude, near touching disks hairline split
Mark McCarthy
Fremont (California/USA)
508mm (533x) 52 Ori. Close but well split, near equal, ivory white. with apodising mask
STF798 7m3 9m5 21.2'' 182° 2017 Ori 05h48m10.42s -08°23'01.10"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x muss ich schon sehr genau hinschauen, dann erkenne ich B südlich von A, ordentlich getrennt - die B-Komponente ist gut 2 Magnituden schwächer - A warmweiß, B dagegen kupferbraun
★★ STT117 7m1 10m0 11.7'' 31° 2015 Aur 05h48m11.46s +30°32'06.70"
Mark McCarthy
Fremont (California/USA)
317mm (277x) bright yellow A and a small faint B. Carbon star to the west in FOV. Lovely, colorful field.
STF797 7m4 9m8 7.3'' 17° 2015 Ori 05h48m28.21s +04°42'14.00"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Yellow and red, 2 delta mag, PA to north.
STF3115 6m5 7m5 0.9'' 337° 2017 Cam 05h49m04.64s +62°48'29.60"

../images/binary-star-orbits/STF3115-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) gerade eben trennbar mit schwarzem Zwischenraum ../projects/double-stars/frederik-wanink/sketches/STF3115.jpg
STF796 AB 7m2 8m2 3.7'' 62° 2019 Aur 05h49m55.53s +31°47'08.70"
Robert Zebahl
Leipzig (Germany)
55mm (83x) Well split with noticeable fainter companion.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Pretty yellow and faint blue
★★ STF791 AB 9m1 10m0 5.0'' 91° 2019 Aur 05h50m03.41s +39°34'34.70"
AC 9m1 11m2 60.7'' 214° 2015
Uwe Pilz
Leipzig (Germany)
320mm (80x) A und B sind deutlich orange. Im selben Feld wie Sigma Orionis ../projects/double-stars/uwe-pilz/sketches/200212sigmaOri.jpg
H5 90, nu Aur 4m0 11m4 55.9'' 206° 2012 Aur 05h51m29.39s +39°08'54.50"
Mark McCarthy
Fremont (California/USA)
317mm (270x) Bright orange with a much fainter wide split.
STF805 8m4 8m9 12.1'' 50° 2015 Tau 05h51m48.20s +28°26'59.60"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein schwaches Paar - Komponente B zeigt sich knapp abgesetzt im NO von A und ist eine halbe Größenklasse schwächer - unauffällig trotz scheinbarer Sternarmut im Umfeld
Uwe Pilz
Leipzig (Germany)
105mm (88x) schwach, aber lohnend, gelb und blaugrau ../projects/double-stars/uwe-pilz/sketches/200117stf805.jpg
STF799 7m3 8m3 0.8'' 158° 2013 Aur 05h52m13.88s +38°33'36.40"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) sehr schwierig, eher geraten
Mark McCarthy
Fremont (California/USA)
317mm (270x) Hairline split but definite in the best moments, white, half delta mag.
★★ BU1053 6m9 8m8 1.9'' 2019 Aur 05h53m28.64s +37°20'20.70"

../images/binary-star-orbits/BU1053-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (133x) Border observation! Companion is temporarily visible in the correct position angle as an extremely dim brightening of the first diffraction ring of the primary component.
Mark McCarthy
Fremont (California/USA)
317mm (270x) Nice!! Blazing white and close but nicely split light blue B, 2 delta mag.
STT123 7m3 9m1 2.1'' 187° 2012 Ori 05h54m09.53s +10°14'39.40"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Orange A and blue B, ~2.5", 2 delta mag
STF816 6m9 9m3 4.1'' 290° 2014 Ori 05h54m55.46s +05°51'38.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White and orange, 3 delta mag, PA WNW.
A2658 10m2 10m3 0.4'' 73° 1995 Ori 05h55m00.02s +06°13'21.50"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Hairline split, near equal pair, faint. With apodizing mask
STF818 9m8 10m1 5.9'' 277° 2014 Ori 05h55m19.45s +04°42'49.80"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Fairly faint, wide, slightly blue, a small mag delta
MIL2 7m1 14m5 11.8'' 232° 2015 Aur 05h55m22.26s +29°57'50.20"
Mark McCarthy
Fremont (California/USA)
317mm (277x) A white A and slightly ruddy B, easy.
STF820 9m1 9m8 5.1'' 110° 2019 Ori 05h55m42.95s +08°58'57.90"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Pretty orange A and light orange B, wide, about 2 delta mag
ARG63 AB 8m7 9m1 32.5'' 67° 2014 Ori 05h57m08.58s +10°13'45.70"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Wide, half delta mag. unremarkable [however it is a physical pair 432 LY away. A is a 0.5" pair with 12th mag B, worth a try on Challenger.]
BU1189 AB-C 8m0 8m3 56.1'' 194° 2015 Ori 05h57m27.59s +00°23'58.50"
Rene Merting
Drachhausen (Germany)
18x70 auffällig, zwei mittelhelle Sterne, die weit auseinander stehen - Komponente B im Süden ist knapp eine halbe Größenklasse schwächer
STT124 6m1 7m4 0.6'' 299° 2018 Ori 05h58m53.23s +12°48'29.80"

../images/binary-star-orbits/STT124-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (170x) Seeing not good. Bloated yellow star with bluish B just attached to the edge, like a wart. B is very faint, small.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Briefly split in the best moments, 1 second out of 10. A star yellow-white and small, hard blue B.
STT126 8m0 10m7 10.7'' 61° 2017 Ori 05h59m24.50s +17°48'53.10"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Wide, three delta mag, yellow-white A and faint white B star
STT125 7m9 8m9 1.4'' 2015 Ori 05h59m42.46s +22°28'15.00"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Yes, I have the split! White stars, a half delta mag, close but very clean separation. Nice
STT545, 37 Aur, theta Aur AB 2m6 7m2 4.1'' 303° 2018 Aur 05h59m43.24s +37°12'45.90"

../images/binary-star-orbits/STT545-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (57x) At 57x nothing seen at first sight. At 133x the much fainter component was visible after a short time as a tiny star in the correct position angle. With this knowledge, the observation at 57x was also successful, even if one has to look very closely. The challenge here is not so much the angular distance as the large difference in brightness.
Uwe Pilz
Leipzig (Germany)
105mm (200x) blauweiß. Wegen der etwas unruhigen Luft und des Helligkeitsunterschiedes nicht einfach. ../projects/double-stars/uwe-pilz/sketches/191216theAur.jpg
SIN128 AC 7m3 7m6 2.6'' 193° 1985 Aur 06h01m14.73s +31°32'28.10"
Robert Zebahl
Leipzig (Germany)
70mm (133x) Even at high magnification there are no indications of a double star. Also the brightness seemed to be less than stated!?
BU16, 3 Mon 5m0 8m0 1.9'' 355° 1996 Mon 06h01m50.42s -10°35'52.60"
Uwe Pilz
Leipzig (Germany)
105mm (260x) schwache Aufhellung im ersten Ring ../projects/double-stars/uwe-pilz/sketches/3Mon.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) Begleiter schwach ../projects/double-stars/uwe-pilz/sketches/bu16.jpg
HDS824 8m2 9m2 2.3'' 149° 2019 Ori 06h03m48.13s +18°15'53.30"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Fine pair, yellow-orange A and white-yellow B, two delta mag
J310 9m8 10m0 2.4'' 319° 2015 Ori 06h03m54.49s +10°14'50.90"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Beautiful matched orange pair, nicely split, very delicate. [surprisingly not a physical pair]
J335 8m4 9m5 1.3'' 271° 2015 Ori 06h04m08.29s +11°00'57.00"

../images/binary-star-orbits/J335-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (205x) White A, B resolves with seeing, hairline split and two delta mag. Tough at this aperture
HO228 7m7 10m2 2.4'' 267° 2000 Ori 06h06m00.88s +12°28'45.60"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Very fine indeed. A white and bright in comparison to B which is in A's glow but faint, resolved, ~2" and two delta mag
STF840 A-BC 7m2 8m9 21.5'' 248° 2014 Ori 06h06m28.04s +10°45'01.00"
BC 9m8 10m1 0.4'' 126° 1997
Mark McCarthy
Fremont (California/USA)
203mm (205x) A-BC: White A and slightly blue B, wide, two delta mag. [Did not see BC, 0.4" near equal]
Mark McCarthy
Fremont (California/USA)
317mm (170x) A-BC: Wide blue-white and slightly red pair, 1 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) BC: B maybe elongated? Not certain.
STT131 7m0 9m4 1.5'' 277° 2012 Aur 06h07m25.84s +36°16'28.70"
Mark McCarthy
Fremont (California/USA)
317mm (270x) Very close, need seeing to resolve 2 delta mag white A and light blue B
STF851 8m9 9m5 2.6'' 33° 2018 Ori 06h08m04.43s +03°17'23.70"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Fine white nearly matched pair of white stars, very nice
STT132 7m2 9m6 1.8'' 332° 2012 Aur 06h08m11.68s +37°58'57.90"

../images/binary-star-orbits/STT132-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (270x) White A and slightly red B. Fine pair. 2 delta mag.
STF844 AB 8m5 9m3 23.4'' 10° 2017 Ori 06h08m18.38s +13°59'50.30"
Rene Merting
Drachhausen (Germany)
18x70 AB: Komponente B steht unmittelbar nordwestlich von A und ist deutlich schwächer
AC: Komponente C ist schwächer als B und steht im SO von A, alle drei Sterne bilden eine Linie
BU17 AB 6m9 9m3 3.6'' 192° 2019 Mon 06h08m25.39s -11°08'46.60"
AC 6m9 10m8 10.2'' 260° 2015
BC 9m3 10m8 9.3'' 276° 1998
Uwe Pilz
Leipzig (Germany)
105mm (288x) Dreifachstern! (Burnham 17) ../projects/double-stars/uwe-pilz/sketches/bu17.jpg
STF848 AB 7m3 8m2 2.6'' 110° 2019 Ori 06h08m30.36s +13°58'15.80"
Rene Merting
Drachhausen (Germany)
18x70 AD: Komponente D ist mit etwas Abstand östlich von Komponente A zu erkennen
AE: Komponente E ist schwächer als D und steht südöstlich von A in doppeltem Abstand wie AD
DH: Komponente H ist noch schwächer als D und steht östlich in dreifachem Abstand wie AD
Robert Zebahl
Leipzig (Germany)
70mm (100x) Well split with obvious difference in brightness.
Christopher Hay
Seeheim (Germany)
125mm (100x) When idly viewing NGC 2169, the “37 Cluster” or “IC37”, I noticed that the brightest star in the 37, namely the one at the NW corner of the 3, is a nicely split double with a thin slice of darkness between the components. PA matches the top bar of the figure-3 well. Stelledoppie lists components of STF848 from A to K, but notes that all are either not physical or uncertain. To my eye only the A-B pair appears double-like.
Mark McCarthy
Fremont (California/USA)
203mm (205x) The "37" cluster. This pair is the star at the tip of the upper part of the three where it turns down to the center. Fine white pair, close but nicely split, two delta mag, busy field
Mark McCarthy
Fremont (California/USA)
317mm (170x) Close bluish pair near the center of the open cluster NGC 2169
STF854 8m8 9m8 5.7'' 321° 2019 Ori 06h08m32.08s +05°48'01.20"
Mark McCarthy
Fremont (California/USA)
203mm (205x) White stars, one delta mag, wide. In a pretty winter Milky Way field
STF849 9m2 9m5 0.9'' 241° 2015 Ori 06h08m44.48s +17°24'07.00"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Snow man at this aperture and mag, near equal
STT134 AB 7m5 9m1 31.0'' 189° 2015 Gem 06h09m15.94s +24°25'40.30"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x zeigt sich südlich von A ein gut 1.5 Magnituden schwächerer Begleiter - ein ordentlich getrenntes Pärchen - im Umfeld nicht sehr auffällig (logisch bei einem Doppelstern in M 35)
COU1101 10m8 10m8 0.9'' 167° 2015 Gem 06h09m35.99s +26°29'49.10"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Just split, white, half delta mag, in a nice field near some open clusters
STF869 8m2 9m1 24.5'' 280° 2017 Mon 06h10m44.34s -09°51'08.30"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x gut getrennt - Komponente B im Westen ist halb so hell wie A - dadurch leichter Farbkontrast, A weiß, B grauweiß - der Doppelstern ist auffallend, weil im Umfeld nicht viel los ist
STF860 8m6 9m8 5.9'' 358° 2018 Gem 06h11m04.87s +24°52'56.30"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Blue-white A and slightly red B, wide, ~2 delta, nice
STF845, 41 Aur 6m2 6m9 7.6'' 357° 2018 Aur 06h11m36.59s +48°42'39.60"
Robert Zebahl
Leipzig (Germany)
55mm (25x) Relatively tight with visible difference in brightness.
J2016, xi Ori AB 4m4 13m0 37.8'' 187° 2008 Ori 06h11m56.40s +14°12'31.60"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Xi Ori. There are a few faint stars around the bright white A star, but certainly the closest is the B. Surprised I can see it given A's glare. [5 star system all faint & wide]
AG107 9m6 9m8 1.5'' 179° 2019 Gem 06h12m49.60s +24°25'36.20"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Very nice white pair, near equal, ~1.5" nicely split
HO22 8m5 8m6 1.0'' 209° 2012 Ori 06h13m27.53s +10°14'52.40"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Very fine hairline split, near equal. Nice!
STF877 7m5 8m0 5.7'' 263° 2019 Ori 06h14m42.67s +14°35'10.80"
Robert Zebahl
Leipzig (Germany)
70mm (44x) Well split, but close together. Little difference in brightness noticeable.
Mark McCarthy
Fremont (California/USA)
203mm (205x) Near equal white, wide
BU1008, eta Gem, 7 Gem, Propus 3m5 6m2 1.8'' 258° 2017 Gem 06h14m52.69s +22°30'24.60"

../images/binary-star-orbits/BU1008-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (260x) Aufhellung im ersten Ring
Uwe Pilz
Leipzig (Germany)
105mm (288x) sehr schwierig ../projects/double-stars/uwe-pilz/sketches/etaGem.jpg
Robert Zebahl
Leipzig (Germany)
152mm (225x) Already comparatively easy at 180x. The faint companion can be seen well as a quite distinct, slightly elongated, partly round brightening. At 225x and above it becomes easy and immediately apparent, even if the diffraction rings of the primary component are not permanently visible due to the seeing. The primary component was shining in a bright orange.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Propus. Yellow A and blue-yellow B, 2 delta mag, 1.5" very nice
A2446 9m0 11m5 2.9'' 103° 2007 Ori 06h15m29.11s +19°31'22.10"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Can just keep faint B star with direct vision. It's quite faint, well away from A
STF880 8m4 8m7 5.6'' 55° 2019 Ori 06h15m29.13s +10°34'42.40"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Nice near equal orange-white, well split
STF872 AB 6m9 7m4 11.3'' 215° 2017 Aur 06h15m39.06s +36°08'55.30"
Robert Zebahl
Leipzig (Germany)
55mm (25x) Well separated with significant difference in brightness.
J686 10m5 10m7 2.3'' 49° 2015 Gem 06h17m26.20s +22°25'37.00"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Very fine pair, near equal to half delta mag white stars, nicely separated but pleasingly close pair
H5 55 7m0 10m8 62.1'' 59° 2015 Gem 06h19m22.52s +23°16'28.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 12 Geminorum: Very wide separation, ~3 delta mag, fairly faint.
AG109 9m4 9m7 2.4'' 16° 2019 Gem 06h19m44.83s +21°28'27.70"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Very nice, half delta mag, nicely split white stars. Very good
AG323 AB 9m0 10m2 1.8'' 49° 2015 Gem 06h19m45.23s +22°06'38.80"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Wow! pops with seeing, 1 delta mag, ~2". Very nice. Two other stars much fainter on the outer reaches likely part of system [these are AC and AD]
HU452 9m5 10m8 2.6'' 343° 2001 Gem 06h19m46.83s +22°18'16.60"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Light yellow orange and light blue stars, more than half delta mag, pretty wide [not physical]
STF889 AB 7m6 9m9 21.3'' 244° 2015 Gem 06h19m51.77s +25°00'49.10"
Rene Merting
Drachhausen (Germany)
18x70 mit etwas Konzentration sind beide Sterne getrennt zu erkennen - A und B sind halb so weit voneinander entfernt wie das nahe liegende Pärchen STTA74 - Komponente B im SW ist genauso schwach wie B bei STTA74, aber dadurch, dass er näher zum Hauptstern steht, ist er schwächer sichtbar
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x unscheinbarer als der 14' nordöstlich liegende STTA74 - die Komponenten von STF889 wirken beide schwächer als die von STTA74 - Komponente B im SW ist gerade so erkennbar, Helligkeitsunterschied mindestens 2 Größenklassen, B ist gut abgesetzt von A - Farbkontrast gelblich, B farblos
TDS3753 11m2 11m4 0.9'' 78° 1991 Gem 06h20m30.31s +25°05'21.40"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Quite faint B star, very tough, ~1" and 1 delta mag
STTA75 7m7 8m9 47.1'' 129° 2015 Ori 06h20m34.48s +18°02'56.70"
Rene Merting
Drachhausen (Germany)
18x70 ein mit ordentlichem Abstand getrenntes Sternpaar - B im SO ist halb so hell wie A
STTA74 AB 7m1 8m9 57.4'' 265° 2015 Gem 06h20m36.35s +25°11'20.40"
Rene Merting
Drachhausen (Germany)
18x70 westlich von Komponente A blinkt in ziemlich weitem Abstand die viel schwächere Komponente B hervor - A ist reinweiß, B wirkt grau
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x weit getrennt - Komponente B im SW ist 1.5 Magnituden schwächer und wirkt farblos gegen die weiß strahlende Komponente A
S513 AB 7m3 8m9 59.4'' 258° 2014 Gem 06h21m14.48s +21°07'56.70"
Rene Merting
Drachhausen (Germany)
18x70 weit getrenntes Pärchen - Komponente B im Westen ist gut 1.5 Größenklassen schwächer und wirkt dadurch bräunlich ggü. der weiß schimmernden Komponente A
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x popeleinfach, weit getrennt - Komponente B im Westen ist gut 1.5 Magnituden schwächer - zurück auf 20x nach wie vor sehr einfach, ein unauffälliger Doppelstern
STF3116, FR CMa AB 5m5 9m7 3.9'' 23° 2003 Mon 06h21m24.71s -11°46'23.60"
Uwe Pilz
Leipzig (Germany)
105mm (130x) schwach, knapp außerhalb des ersten Rings, kein Problem
Uwe Pilz
Leipzig (Germany)
105mm (137x) einfach
Uwe Pilz
Leipzig (Germany)
105mm (198x) oberhalb ß Cma
STF898 AB 9m0 9m6 6.2'' 122° 2018 Ori 06h21m57.42s +10°58'16.50"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Equal pair, wide, may be part of triple, in nebulosity? [Is part of a triple, WAL 44 is AC, 9.00/11.28 26.5"]
STF881, 4 Lyn AB 6m1 7m7 0.6'' 149° 2016 Lyn 06h22m03.57s +59°22'19.50"

../images/binary-star-orbits/STF881-AB-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) schwierig wegen Helligkeitsunterschied
STF899 7m4 8m0 2.2'' 17° 2019 Gem 06h22m49.64s +17°34'27.30"
Robert Zebahl
Leipzig (Germany)
70mm (133x) Separated, but tight with visible difference in brightness.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Near equal, rather wide, one a little yellow the other light blue-white
OL67 10m9 11m9 5.2'' 39° 2015 Gem 06h23m00.44s +22°13'12.80"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Averted vision only, wide, pops with seeing, just able to see it
STF900, epsilon Mon, 8 Mon AB 4m4 6m6 12.0'' 29° 2017 Mon 06h23m46.10s +04°35'34.20"
Robert Zebahl
Leipzig (Germany)
55mm (42x) Relatively large distance and clear difference in brightness. The lighter component seemed white-yellowish, the weaker one slightly greenish-blue. The color contrast, however, was not particularly conspicuous.
Uwe Pilz
Leipzig (Germany)
105mm (288x) Blau-rot ../projects/double-stars/uwe-pilz/sketches/epsMon.jpg
STT140 AB 6m9 10m1 3.0'' 119° 2012 Gem 06h26m37.73s +15°31'25.30"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Nice 3 delta mag pair, wide, clean with seeing, bluish stars
STF914 6m3 9m2 21.0'' 298° 2017 Mon 06h26m44.85s -07°30'43.00"
Rene Merting
Drachhausen (Germany)
18x70 ein ordentlich getrenntes Pärchen, wobei die Komponente B westnordwestlich von A nur knapp sichtbar ist - Helligkeitsunterschied mindestens 3, wenn nicht sogar 4 Größenklassen
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x kommen beide Sterne wie großer und kleiner Bruder daher - Komponente B im steht NW in guter Entfernung zu A - Komponente A ist strahlend weiß, B wirkt aufgrund des Helligkeitsunterschiedes farblos - zurück auf 20x ist B auch noch knapp zu erkennen und immernoch ordentlich getrennt von A
AG112 AB 9m8 9m9 2.8'' 209° 2019 Gem 06h27m30.03s +24°32'00.80"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Very pretty equal white, wide ~4". [not physical :-( ]
BRT2351 10m3 10m9 4.4'' 39° 2010 Gem 06h27m36.35s +21°53'38.80"
Mark McCarthy
Fremont (California/USA)
508mm (333x) White, half delta mag, wide ~5", makes a wide equilateral triangle with two other stars. [not physical]
SHJ70 AB 6m7 8m2 25.0'' 202° 2017 Gem 06h27m46.58s +20°47'22.60"
Rene Merting
Drachhausen (Germany)
18x70 ein schönes enges Sternpaar, Komponente B ist SW ist ordentlich getrennt von A zu erkennen - etwas über eine Größenklasse Helligkeitsunterschied, dadurch leichter Farbkontrast
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very pretty orange A, with a brown B, ~1.5 delta mag.
J1092 AB 11m6 12m5 6.8'' 226° 2016 Gem 06h27m51.15s +22°51'06.20"
Mark McCarthy
Fremont (California/USA)
508mm (333x) A bit faint, bluish, wide ~5", half delta mag
★★★ beta Mon, 11 Mon, STF919, BU570 STF919 AB 4m6 5m0 7.1'' 133° 2017 Mon 06h28m49.07s -07°01'59.00"
STF919 AC 4m6 5m4 9.8'' 125° 2018
STF919 BC 5m0 5m3 2.6'' 108° 2018
BU570 AD 4m6 12m1 26.5'' 56° 2014
Rene Merting
Drachhausen (Germany)
18x70 STF919 (AB): das Mehrfachsystem ist als 8 erkennbar, eine extrem knappe Berührung, wobei die Komponenten B und C im SO nur als ein Stern gesehen werden können - BC ist gleich hell wie A allein
Rene Merting
Drachhausen (Germany)
100mm (32x) A-BC: bei 32x ein wunderschöner eng stehender Doppelstern - die bei dieser Vergrößerung noch nicht trennbare Komponenten B und C im SO wirken leicht gelblich und ist leicht heller als A - die Komponenten A und BC wollen sich berühren, schaffen es aber nicht ;-)
BC: bei 64x wirkt BC leicht länglich wie ein Stäbchen - bei 107x dann der Aha-Effekt, es sind zwei Sterne, knapp getrennt und mit gleichem Positionswinkel wie A-BC - beide Komponenten B und C sind gleich hell und einzeln jeweils etwa eine halbe Größenklasse schwächer als A im NW
Uwe Pilz
Leipzig (Germany)
105mm (137x) Dreifachsystem, drei fast gleichhelle Sterne. Alle blau-weiß ../projects/double-stars/uwe-pilz/sketches/betaMon.jpg
STT141 AB 7m7 9m8 2.3'' 144° 2013 Gem 06h30m01.34s +17°54'23.80"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Beautiful blue-white A star and 2 delta mag B, nice split, ~2.5"
WEI12 8m6 8m7 8.6'' 66° 2015 Gem 06h31m08.66s +21°43'06.00"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Near equal white, wide, unremarkable
STT143 AB 6m2 10m1 7.9'' 103° 2015 Gem 06h31m09.99s +16°56'19.00"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Very pretty yellow-white A star with blue-white B, 3 delta mag., well split
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange A, very faint B, ~3", PA due east. 3rd to the north is FOX 147
FOX147 AC 6m2 11m4 47.3'' 346° 2015 Gem 06h31m09.99s +16°56'19.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 3rd star in STT 143, to the north, faint and widely separated
FAB5 Aa-Ab 7m2 9m6 0.9'' 18° 1991 Mon 06h31m40.54s +05°46'08.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Misshapen disk at best moments, very difficult
STF926 AB 7m2 8m6 10.8'' 287° 2017 Mon 06h31m40.54s +05°46'08.80"
Mark McCarthy
Fremont (California/USA)
317mm (170x) In a triangle of stars which points toward the Rosette Nebula. Blue-white A star and slightly red B, 1 delta mag, wide. The A star is FAB 5
TDS254 10m6 10m6 0.8'' 287° 2016 Gem 06h31m46.04s +21°24'25.60"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Just split, noticeable delta mag, yellow-white A star
★★ STF924, 20 Gem AB 6m3 6m9 20.7'' 212° 2017 Gem 06h32m18.52s +17°47'03.40"
BC 6m9 13m0 47.8'' 144° 2014
Rene Merting
Drachhausen (Germany)
18x70 AB: das dicht stehende Paar fällt sofort ins Auge - Komponente A im Norden ist vielleicht eine halbe Magnitude heller als Komponente B, die leicht gräulich strahlt
Robert Zebahl
Leipzig (Germany)
70mm (22x) AB: At 22x bright, immediately conspicuous, although in a relatively star-rich surrounding. Moderate but beautiful color contrast: bright orange, decent blue. Also at 44x very beautiful sight.
Robert Zebahl
Leipzig (Germany)
152mm (69x) AB: Easy, bright, moderately uneven. Nice contrast in color: slight orange, white-blueish.
STT145 7m3 9m9 1.5'' 338° 1991 Gem 06h32m20.69s +15°42'22.30"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Bright yellow-white B and very much fainter B, just outside of A's glare, ~1.5", 3 delta mag
J1956 9m5 9m9 9.8'' 60° 2015 Gem 06h33m02.93s +17°05'11.70"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Faint but wide pair, blue color due to faintness, one more visible than other. Seems in a string of three [not physical]
STF918 AB 7m3 8m2 4.9'' 336° 2019 Aur 06h33m57.62s +52°27'41.80"
Robert Zebahl
Leipzig (Germany)
55mm (40x) At 40x tight, at 55x well split with obviously fainter companion.
S524 AB 7m2 7m4 53.0'' 244° 2017 Gem 06h34m07.10s +22°07'27.20"
Rene Merting
Drachhausen (Germany)
18x70 AB: popeleinfach mit dem FG - ein mehr als gut getrenntes Pärchen zweier gleich heller Sterne - die östliche Komponente wirkt ein klein wenig heller - A warmweiß, B blauweiß
Rene Merting
Drachhausen (Germany)
100mm (20x) AB: bei 32x zeigen sich zwei annähernd gleichhelle Sterne weit getrennt voneinander - Komponente B im SW wirkt kühler als A
AC: bei 32x ist südöstlich von A in doppeltem Abstand wie AB eine weitere Komponente erkennbar - C ist mindestens 2 Größenklassen schwächer als B - alle drei Sterne bilden ein schönes rechtwinkliges Dreieck, wobei die Ecke von A den rechten Winkel bildet - zurück auf 20x ist C auch noch knapp sichtbar
★★ STT147 AB 6m8 8m7 42.7'' 74° 2016 Aur 06h34m19.37s +38°04'33.60"
A-CD 6m8 9m8 44.5'' 119° 2016
CD 10m6 11m0 0.5'' 109° 1957
Uwe Pilz
Leipzig (Germany)
105mm (200x) ../projects/double-stars/uwe-pilz/sketches/200123stt147.jpg
Robert Zebahl
Leipzig (Germany)
152mm (69x) At 22x, the components A, B and CD are immediately conspicuous, where A dominates. They form a beautiful, acute-angled triangle. At 69x, color differences are also visible. A: subtle orange; B: grey-blueish; CD: tendency to orange. Rewarding, because the double stars STF 928 & STF 929 as well as the very conspicuous carbon star UU Aur are in close proximity and can partly be observed together in one field of view!
STF932 8m3 8m5 1.6'' 305° 2017 Gem 06h34m21.57s +14°45'08.30"

../images/binary-star-orbits/STF932-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (150x) Unfortunately a nearby lamp bothered me. I could see the double star at least elongated.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Very neat near equal white stars, well split
★★ STF928 AB 7m9 8m6 3.4'' 131° 2019 Aur 06h34m41.81s +38°32'24.50"
AC 7m9 12m4 130.9'' 124° 2002
BC 8m6 12m4 127.3'' 124° 2015
Robert Zebahl
Leipzig (Germany)
102mm (62x) AB: At 28x the double star already appeared elongated, at 62x beautifully separated, with component A shining in a warm, decent orange. At 125x A appeared orange, B grey-blueish.
Uwe Pilz
Leipzig (Germany)
105mm (200x) AB: kühl-weiß und lila ../projects/double-stars/uwe-pilz/sketches/200123stf928.jpg
Robert Zebahl
Leipzig (Germany)
152mm (69x) AB: Clearly separated, but tight. Moderate difference in brightness. Nice view with the nearby double stars STT147 & STF 929 and the carbon star UU Aur!
STF938, 14 Mon 6m5 10m6 11.0'' 211° 2012 Mon 06h34m46.33s +07°34'21.00"
Mark McCarthy
Fremont (California/USA)
317mm (170x) Bright A and very faint 4 delta mag B
STF929 7m3 8m4 6.5'' 24° 2016 Aur 06h35m22.03s +37°42'55.10"
Robert Zebahl
Leipzig (Germany)
152mm (69x) Easy to separate, clear difference in brightness, slight color contrast. Primary component showed a slight orange color, the color of the companion was not clearly defineable. Nice view with the nearby double stars STT147 & STF 928 and the carbon star UU Aur!
S529 AB 6m9 9m3 53.0'' 131° 2015 Gem 06h37m33.90s +12°10'50.00"
Rene Merting
Drachhausen (Germany)
18x70 ein weit getrenntes Sternpaar - Komponente B im SO ist kupferbraun, die gut 2 bis 2.5 Größenklassen hellere Komponente A strahlt weiß
STF942 10m1 10m1 3.5'' 246° 2015 Gem 06h37m40.87s +23°38'54.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint near equal brightness, well split
A2452 9m3 9m6 0.9'' 89° 2015 Gem 06h38m07.10s +19°52'38.70"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Fine near equal pair, well split but close
STF941 AB 7m2 8m2 2.0'' 83° 2019 Aur 06h38m40.76s +41°34'53.40"
AC 7m2 10m5 83.9'' 135° 2015
Robert Zebahl
Leipzig (Germany)
102mm (28x) AC: Distant, faint companion that is less attracting attention. Used magnifications between 28x and 125x.
Robert Zebahl
Leipzig (Germany)
102mm (86x) AB: At 62x only visible as figure '8'. The difference in brightness is hardly noticeable. At 86x barely separated, obvious. Clearly separated at 125x, but still tight with a moderate brightness difference.
STT152, 54 Aur 6m2 7m8 0.8'' 34° 2016 Aur 06h39m33.12s +28°15'47.40"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) schwierig, Luftunruhe ../projects/double-stars/frederik-wanink/sketches/STT152.jpg
J353 9m4 10m3 4.1'' 65° 2015 Gem 06h39m57.85s +16°21'39.20"
Mark McCarthy
Fremont (California/USA)
508mm (333x) White A and slightly red B, wide ~5", 2 delta mag
BRT1208 7m9 10m5 5.1'' 175° 2015 Gem 06h40m35.04s +17°38'26.50"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Easy wide pair, white A and a little red B, ~2 delta mag
STF950, S Mon AB 4m7 7m8 3.0'' 214° 2018 Mon 06h40m58.66s +09°53'44.70"
Mark McCarthy
Fremont (California/USA)
317mm (170x) This is the brightest star, forming the trunk, of the Christmas Tree cluster, NGC 2264. Bright white and wide 4 delta mag B star, well separated. Spent some time at 71x to look at the cluster as a whole.
KU27 10m1 10m4 6.9'' 187° 2015 Gem 06h42m11.50s +14°51'29.50"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Easy equal white, wide, in a rich field
STF956 AC 8m0 8m9 36.3'' 158° 2015 Mon 06h42m40.55s +01°42'58.20"
Rene Merting
Drachhausen (Germany)
18x70 leicht - Komponente C zeigt sich gut getrennt im Südwesten von A und ist mehr als eine Größenklasse schwächer
AG119 8m9 9m1 1.5'' 83° 2015 Gem 06h44m37.54s +23°26'48.90"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Fine near equal white, nicely split ~1.5". There's another pair on the edge of the field, wider and brighter
★★ STF946 7m3 9m1 4.0'' 129° 2019 Lyn 06h44m51.62s +59°26'57.40"
Robert Zebahl
Leipzig (Germany)
102mm (86x) Easy to split with noticeable difference in brightness. Very nice view together with the triple system STF 948 in one field of view! ../projects/double-stars/robert-zebahl/sketches/2020-03-23_stf946_stf948.jpg
Uwe Pilz
Leipzig (Germany)
105mm (88x) im selben Feld mit 12 Lyn ../projects/double-stars/uwe-pilz/sketches/200409_12lynstf946.jpg
Robert Zebahl
Leipzig (Germany)
152mm (100x) At 100x and 129x easy to separate, quite uneven. Primary component appeared yellowish, the fainter one rather greyish. Fantastic view together with 12 Lyn (STF 948) in one field of view!
AGC1, 9 CMa, alpha CMa, Sirius AB -1m5 8m4 10.7'' 75° 2016 CMa 06h45m08.92s -16°42'58.00"

../images/binary-star-orbits/AGC1-AB-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (198x) mit ADV, ohne nicht trennbar. Eindeutig
Mark McCarthy
Fremont (California/USA)
203mm (368x) Small disk formed on diffraction spike at correct separation and PA (Feb. 2016)
Mark McCarthy
Fremont (California/USA)
317mm (443x) A faint yellow-orange disk, to the edge of Sirius A’s diffraction and just below my spider’s diffraction spike. I let Sirius pass beyond the field stop, and for an instant there was Sirius B, clearly separated, before it too passed beyond the field stop.
STF957 AB 7m5 9m4 3.8'' 90° 2019 Gem 06h45m10.02s +30°49'33.50"
AC 7m5 13m8 19.3'' 100° 2015
Robert Zebahl
Leipzig (Germany)
70mm (100x) AB: Too faint for a separation. Primary component visible, companion not. Used magnifications from 67x to 133x. Observation from city at moon (83%).
Robert Zebahl
Leipzig (Germany)
152mm (129x) AB: Easy with significant difference in brightness and moderate angular distance.
POU1983 11m3 11m6 2.9'' 315° 2015 Gem 06h45m16.14s +24°12'43.50"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Faint but easily seen, near equal, well split to wide, ~2.5" , bluish due to faintness
STT155 7m1 10m9 15.1'' 261° 2015 Gem 06h45m23.51s +24°40'20.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty orange star with 2x fainter B, also orange, due west, ~6"
BRT146 11m2 11m8 3.6'' 47° 2015 Gem 06h45m55.18s +24°05'58.00"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Faint, 1 delta mag, ~1.5" well split
COU472 11m4 11m3 1.9'' 83° 2015 Gem 06h46m07.21s +22°33'06.80"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Faint but very fine pair, really pretty in the field, a little blue, half delta mag, ~1.5" Nice
★★★ STF948, 12 Lyn AB 5m4 6m0 1.9'' 64° 2019 Lyn 06h46m14.15s +59°26'30.10"
AC 5m4 7m0 8.8'' 310° 2018

../images/binary-star-orbits/STF948-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
55mm (27x) AC: Components A/B and C well separated, but tight. Significant difference in brightness. The fainter C companion appeared slightly orange, the brighter one white-bluish.
Robert Zebahl
Leipzig (Germany)
55mm (167x) AB: Components A and B separated, whereby the Airy disks slightly overlap. The difference in brightness was well visible. ../projects/double-stars/robert-zebahl/sketches/2019-01-21_stf948.jpg
Robert Zebahl
Leipzig (Germany)
63mm (140x) AB: Components A and B split with almost no space in between. The difference in brightness was visible. ../projects/double-stars/robert-zebahl/sketches/2019-01-22_stf948.jpg
Robert Zebahl
Leipzig (Germany)
70mm (22x) AC: Well split, relatively close together with significant difference in brightness.
Robert Zebahl
Leipzig (Germany)
70mm (133x) AB: Both components A + B clearly split, whereby the diffraction rings where merged together. A very nice view together with component C. I sketched this triplet, which reflects my impression well. Unfortunately, the distance and position angle are not particularly well observed. Also the difference in brightness I didn't noticed during my observation. ../projects/double-stars/robert-zebahl/sketches/2019-01-20_stf948.jpg
Robert Zebahl
Leipzig (Germany)
102mm (129x) At 28x the pair AC is nicely separated without any problems. The close pair AB is already recognizable at 86x as a clear figure '8', at 125x wonderfully separated. The components A & B appear yellowish. Very nice view together with STF 946 in one field of view! ../projects/double-stars/robert-zebahl/sketches/2020-03-23_stf946_stf948.jpg
Uwe Pilz
Leipzig (Germany)
105mm (88x) im selben Feld mit STF 946 ../projects/double-stars/uwe-pilz/sketches/200409_12lynstf946.jpg
Robert Zebahl
Leipzig (Germany)
152mm (129x) At 49x the pair AC is beautifully separated with a significant difference in brightness. At 100x, the close pair AB is also separated, although still very close together. A slight difference in brightness is noticeable. At 129x, the view is magnificent. The two bright components A & B present themselves yellowish, the fainter component C rather greyish. STF 948 can be well observed in a field of view with the neighbouring double star STF 946. Both show a nice overall scenery.
HO238 8m9 9m1 0.3'' 174° 2013 Gem 06h46m20.91s +18°12'08.20"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Barely hairline split at best moments, but conditions have a lot of haze and bloating. A half delta mag is noticeable. I can tell the star is a pair at 333x, but no where near resolvable
HWE15 8m9 10m3 13.2'' 218° 2015 CMa 06h46m35.21s -20°34'45.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange, a wide faint blue B star
POU2009 12m6 12m7 6.4'' 215° 2015 Gem 06h47m00.33s +23°35'21.90"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Just barely there, averted vision brightend it up, but I can still pull it out direct. Faint, bluish, wide, near equal
BRT2362 11m9 12m6 3.4'' 2015 Gem 06h47m12.56s +17°27'46.50"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Dare I say a glittering pair, faint but it twinkles, wide, bluish, probably parts of a plus one about twice as separated but with similar mag [not physical]
STT157 7m2 9m2 0.6'' 161° 2018 Mon 06h47m47.56s +00°20'24.50"

../images/binary-star-orbits/STT157-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (277x) Yellow A, widely separated from blue B. 2 magnitude difference. Did not notice 0.8" separation in A
J992 11m5 12m3 4.0'' 100° 2015 Gem 06h48m08.72s +16°53'16.60"
Mark McCarthy
Fremont (California/USA)
508mm (333x) B star almost needs averted vision to see, but shows up direct when seeing stills. Wide ~5", 1 delta mag, nice pair [not physical]
STF958 AB 6m3 6m3 4.5'' 77° 2019 Lyn 06h48m12.29s +55°42'15.10"

../images/binary-star-orbits/STF958-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (33x) Clearly split, equally bright, close together. Nice view.
Robert Zebahl
Leipzig (Germany)
102mm (62x) Very nicely split. Both components appear similarly bright and white-yellowish.
STF972 A-BC 8m3 9m3 12.5'' 154° 2016 CMa 06h48m22.15s -15°19'47.30"
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 64x ein schwaches, unscheinbares, etwas mehr als knapp getrenntes Sternpaar - B im SO ist nur unwesentlich schwächer (lt. Stelle Doppie aber doch 0.99 mag)
A58 AB 7m4 8m7 5.0'' 161° 2015 Mon 06h48m35.78s -04°04'32.60"
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 64x ein knapp getrenntes Pärchen - Komponente B im Süden ist eine Größenklasse schwächer und wirkt grau
PAL3 BC 11m7 13m5 5.6'' 295° 2015 Gem 06h51m01.86s +19°14'44.20"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Third star seen with averted vision pretty close to WFC 46 B, ~3-4"
WFC46 AB 11m4 11m7 9.2'' 297° 2015 Gem 06h51m02.45s +19°14'40.00"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Wide bluish pair about half delta mag. I see a third star with averted vision pretty close to one of these stars, ~3-4" interesting [PAL 3 BC, 11.65/13.50 5.6"]
POU2065 12m1 12m9 4.8'' 175° 2015 Gem 06h51m25.93s +24°25'17.40"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Pretty faint, pulled out with averted and held there, wide, about half delta mag. [not physical]
POU2072 9m5 11m3 9.8'' 38° 2015 Gem 06h51m42.09s +23°14'36.40"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Easy, white and blue, ~1.5 delta mag, pretty wide
HJ740 AB 8m2 9m1 21.2'' 2015 Mon 06h51m46.17s +00°27'35.90"
Rene Merting
Drachhausen (Germany)
18x70 Komponente B ist nördlich von A knapp getrennt erkennbar - Helligkeitsunterschied vielleicht eine Größenklasse
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein ordentlich getrenntes Sternpaar - Komponente B wirkt halb so hell wie A
STF974, 59 Aur AB 6m1 10m2 22.2'' 224° 2015 Aur 06h53m01.41s +38°52'08.90"
BC 10m2 12m8 25.6'' 219° 2015
Robert Zebahl
Leipzig (Germany)
102mm (28x) AB: Easy, moderate distance, pretty uneven. A appeared white-yellowish, B only as a tiny star.
STF985 7m8 8m4 32.6'' 323° 2017 Mon 06h53m56.06s -04°23'32.80"
Rene Merting
Drachhausen (Germany)
18x70 leicht (bequem getrennt) und schön mit Farbkontrast - Komponente A im Südwesten ist leicht gelblich, B wirkt dagegen grau - ein paar schwächere Sterne im Umfeld sorgen dafür, dass der Doppelstern noch etwas mehr hervor gehoben erscheint
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein weite Trennung - ein schöner Farbkontrast, Komponente A südöstlich ist weißgelb, B im NW dagegen ist zartorange - zurück auf 20x ordentliche Trennung
STF982, 38 Gem AB 4m8 7m8 7.4'' 143° 2018 Gem 06h54m38.63s +13°10'40.10"

../images/binary-star-orbits/STF982-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
55mm (27x) At 27x pretty tight with much fainter component. At 71x clearly separated with clear difference in brightness. Brighter component appeared slightly yellowish, the weaker one slightly bluish.
Robert Zebahl
Leipzig (Germany)
70mm (33x) Easy to separated with noticeable difference in brightness. The fainter component appeared slightly orange, the brighter one rather white.
Uwe Pilz
Leipzig (Germany)
105mm (130x) recht attraktiv
Mark McCarthy
Fremont (California/USA)
203mm (333x) 38 Gem. Light yellow A and blue B, quite wide, very pretty. AC much wider separation much fainter not noticed
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty yellow and orange, 2 delta mag, wide separation
Mark McCarthy
Fremont (California/USA)
371mm (553x) Bright orange and slightly red star, 2-3 delta mag.
H5 65, 17 CMa AB 5m8 8m7 42.9'' 147° 2015 CMa 06h55m02.74s -20°24'17.50"
AC 5m8 9m2 48.5'' 187° 2015
AD 5m8 9m7 128.8'' 187° 2015
BC 8m7 9m2 31.3'' 247° 2015
CD 9m2 9m7 80.4'' 187° 2015
Rene Merting
Drachhausen (Germany)
18x70 AB: ein mehr als ordentlich getrenntes Pärchen - Komponente B im SO ist gut 2.5 Größenklassen schwächer, aber noch gut erkennbar - schöner Farbkontrast
Rene Merting
Drachhausen (Germany)
100mm (107x) AB: bei 32x getrenntes Paar, Komponente B im Süden deutlich schwächer
AC: bei 107x wird westlich von Komponente B ein noch schwächerer Stern sichtbar, Komponente C - dieser Stern steht minimal weiter weg von A als B
J273 AB 9m9 10m3 4.4'' 340° 2017 Gem 06h55m18.52s +12°35'07.00"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Near equal white, pretty wide
STF981 8m7 9m0 0.9'' 119° 2016 Gem 06h55m28.54s +30°09'42.30"

../images/binary-star-orbits/STF981-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Very close orange pair, equal magnitude. Clean split, ~1".
HN 123, pi CMa 4m7 9m6 11.6'' 13° 2015 CMa 06h55m37.40s -20°08'11.70"
Rene Merting
Drachhausen (Germany)
100mm (107x) bis 107x vergrößert, aber mehr als eine kleine kaum wahrnehmbare Ausbeulung nach Norden war nicht drin - höher Vergrößern wegen schlechtem Seeing nicht ratsam in der Nacht - kurios, der Stern strahlte zweifarbig, bläulich im Norden und ein helloranger Rand im Süden - ob das ein Dispersionseffekt war oder hervorgerufen aufgrund der beiden eng stehenden Sterne, vermag ich nicht zu sagen
HO27 AB 9m6 10m1 3.7'' 127° 2015 Gem 06h56m03.65s +20°05'03.20"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Nice near equal, though mag difference is notable. Third slightly brighter a bit further out [this is AC, 9.64/9.71 23"]
STF991 AB 8m0 9m2 3.8'' 165° 2019 Gem 06h57m01.26s +24°57'27.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White and orange, 2 delta mag, ~5", PA to S.
Mark McCarthy
Fremont (California/USA)
508mm (333x) Pretty off-yellow A and a little ruddy red B, nice
STT159, 15 Lyn AB 4m5 5m5 0.7'' 236° 2017 Lyn 06h57m16.60s +58°25'23.00"

../images/binary-star-orbits/STT159-AB-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (200x) nicht getrennt im April 2020 ../projects/double-stars/uwe-pilz/sketches/200409_15Lyn.jpg
Frederik Wanink
Itterbeck (Germany)
254mm (640x) relativ einfach ../projects/double-stars/frederik-wanink/sketches/15Lyn.jpg
A2459 AB 9m8 9m8 0.4'' 274° 2008 Gem 06h57m39.64s +19°35'04.10"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Notched near equal at best moments
STTA80 AB 7m2 7m4 124.1'' 53° 2015 Gem 06h58m06.59s +14°13'43.40"
AC 7m2 8m4 81.2'' 112° 2015
Robert Zebahl
Leipzig (Germany)
70mm (22x) All 3 components form a striking triangle and are slightly different in color. A (western component): white-blueish; B (northern component): white-yellowish; C (southern component): orange, partly slightly reddish. ../projects/double-stars/robert-zebahl/sketches/2019-12-18_stta80.jpg
STF1004 8m1 9m7 20.5'' 89° 2015 Mon 06h58m27.93s -11°25'51.40"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein schickes Pärchen, komfortabel getrennt - Komponente B im Osten ist deutlich schwächer, mindestens 1.5 Größenklassen - Farbkontrast, weil B so schwach ist - zurück auf 20x gelingt die Trennung weiterhin
CPO7, eps CMa 1m5 7m5 7.9'' 162° 2008 CMa 06h58m37.55s -28°58'19.50"
Mark McCarthy
Fremont (California/USA)
203mm (113x) Adhara, epsilon Canis Majoris: Wow! Bright (+1.5 magnitude) and large A with small and much fainter close B (magnitude +7.5) to the south. Lovely double
STF1000 AB-C 8m1 9m0 22.1'' 67° 2016 Gem 06h59m21.15s +25°14'00.20"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein bequem getrenntes Pärchen - Komponente AB kühlweiß - Komponente C im Osten ist eine dreiviertel Größenklasse schwächer und grauweiß
STF994 AB 7m9 8m1 26.4'' 55° 2017 Aur 06h59m27.19s +37°05'53.50"
Robert Zebahl
Leipzig (Germany)
55mm (25x) Well separated, large distance, slight difference in brightness.
STF1007 AB 7m4 11m4 14.6'' 300° 2015 Gem 07h00m37.12s +12°43'24.20"
AC 7m4 10m0 21.9'' 244° 2015
AD 7m4 7m7 67.7'' 28° 2016
Robert Zebahl
Leipzig (Germany)
70mm (22x) AD: Wide separation, small difference in brightness. Slight difference in color, but difficult to describe. Component A at least seemed rather white. South of STF1007 there is also the double star HJ3288 and the star HD52976, which appears in a bright orange. Together in one field of view a beautiful sight. ../projects/double-stars/robert-zebahl/sketches/2019-12-18_stf1007_hj3288.jpg
★★ BU100 7m3 11m1 3.2'' 261° 1978 Gem 07h00m56.55s +12°24'00.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty orange and blue. 4 delta mag, PA to west. Wide separation ~3" B is just seen, a very fine point.
STT163 AB 7m2 8m2 0.2'' 99° 1997 Mon 07h01m09.85s +11°46'28.70"

../images/binary-star-orbits/STT163-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Not perfectly round AB, a faint bluish haze in the diffraction to the south. Marginal.
STF1010 AC 7m7 8m8 22.3'' 2017 Mon 07h01m27.05s -03°07'03.30"
Rene Merting
Drachhausen (Germany)
18x70 ein schönes enges Pärchen - Komponente B zeigt sich nicht zu knapp getrennt nördlich von A - Helligkeitsunterschied eine Größenklasse - zwei sehr schwache Sterne flankieren nahezu symmetrisch im SO und SW das Paar - netter Anblick
BU573 7m2 7m8 0.8'' 311° 2018 Mon 07h01m49.89s -10°52'56.30"

../images/binary-star-orbits/BU573-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (247x) schwach gekerbt ../projects/double-stars/uwe-pilz/sketches/bu573.jpg
HJ3288 7m3 8m7 38.5'' 247° 2015 Gem 07h02m18.43s +12°34'54.20"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Easy to separate with moderate angular distance and a significant difference in brightness. Slight difference in color: white-yellowish, slightly orange. Nice view together with the double star STF1007 and HD52976, which appears in a bright orange. Sketched together with STF1007. ../projects/double-stars/robert-zebahl/sketches/2019-12-18_stf1007_hj3288.jpg
A2462 AB 9m2 9m0 0.2'' 259° 2018 Gem 07h02m37.42s +15°58'26.50"

../images/binary-star-orbits/A2462-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (1067x) Short period list. Notched, noticeable magnitude difference, B star pointed in direction of apex of right triangle it forms with two other eighth magnitude stars. Light orange stars
HO342 8m0 8m7 1.2'' 89° 2016 Gem 07h02m50.54s +13°05'21.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow-orange and blue stars, PA to the east, 1 delta mag, tight but well split ~1".
Mark McCarthy
Fremont (California/USA)
371mm (553x) Split when seeing stills. orange A and yellowing B, 1.5-2”
A1575 8m6 9m3 0.8'' 283° 2016 Lyn 07h03m01.14s +54°02'55.40"
Robert Zebahl
Leipzig (Germany)
102mm (160x) Not clearly visible as double star.
Robert Zebahl
Leipzig (Germany)
152mm (225x) 2020-03-23: At 225x and 300x clearly elongated, partly seen as figure '8'.
★★ STF1001 AB 7m8 9m4 9.1'' 66° 2019 Lyn 07h03m05.51s +54°10'26.60"
AC 7m8 9m3 9.9'' 58° 2019
BC 9m4 9m3 1.6'' 2019
Robert Zebahl
Leipzig (Germany)
102mm (160x) 2020-03-23: At 28x the pair A-BC is easy to separate. At 160x, the very close pair BC shows split. The component A appears slightly orange.
Uwe Pilz
Leipzig (Germany)
105mm (88x) ../projects/double-stars/uwe-pilz/sketches/200409stf1001.jpg
Robert Zebahl
Leipzig (Germany)
152mm (129x) 2020-03-23: At 22x, the wide pair A-BC already appears separated, but still very tight. At 69x, A appears in a decent orange. The pair BC shows elongated and rather greenish-bluish. At 100x BC is already visible as figure '8' and almost separated, at 129x clearly separated. Components B and C are still very close together and equally bright. The color impression remains. An interesting and rewarding triple system! ../projects/double-stars/robert-zebahl/sketches/2020-03-23_stf1001.jpg
STF1009 AB 6m9 7m0 4.4'' 148° 2019 Lyn 07h05m39.83s +52°45'31.30"
Robert Zebahl
Leipzig (Germany)
70mm (33x) Very nice view. Equally bright components, tight.
★★ STF1014 9m9 9m9 2.0'' 221° 2017 Gem 07h05m44.95s +26°08'25.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint near equal brightness pair, ~3", PS to the SW.
ENG28 AB 7m9 7m7 171.9'' 99° 2015 Gem 07h08m00.24s +15°31'42.90"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Pretty, wide equal finder split, white, nice field.
STT165, 45 Gem AB 5m4 10m9 16.0'' 2015 Gem 07h08m22.04s +15°55'51.30"
Mark McCarthy
Fremont (California/USA)
508mm (533x) 45 Gem. With apodizing mask. Bright light orange and very wide eleventh mag B, 4-5 delta mag, ~15". [not physical]
STTA83, HO519 HO519 AB 7m2 13m0 32.5'' 73° 2015 Gem 07h09m35.47s +25°43'44.70"
STTA83 AC 7m2 7m8 123.3'' 79° 2015
Robert Zebahl
Leipzig (Germany)
70mm (22x) STTA83 (AC): Wide pair, relatively bright, moderate difference in brightness. A: slightly orange; C: grey-blue. Southeast of the pair in a much larger distance there is another, fainter star, which appears orange, partly reddish. It does not belong to the system. All three stars form a beautiful right-angled triangle.
HJ3934 A-BC 6m9 8m5 13.6'' 238° 2017 CMa 07h11m20.93s -21°48'11.80"
Uwe Pilz
Leipzig (Germany)
105mm (180x) schwach
HDS999 6m4 9m1 0.3'' 2012 CMi 07h12m07.50s +05°28'27.70"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) I detect a bluish bump on one side of the orange A star at best moments, and assume this is the B star, but I'm unsure. It is just a discoloration along the rim with a very slight bump out. Seeing is not good enough to resolve
WEI14 7m8 8m9 2.1'' 160° 2012 Gem 07h12m48.16s +15°10'41.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) A yellow-orange, blue B, 1 delta mag, PA to south. Nice!
STF1037 AB 7m2 7m3 0.8'' 304° 2018 Gem 07h12m49.08s +27°13'30.20"

../images/binary-star-orbits/STF1037-AB-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (260x) eingekerbt ../projects/double-stars/uwe-pilz/sketches/stf1037.jpg
Frederik Wanink
Itterbeck (Germany)
254mm (640x) leichter, gleich hell ../projects/double-stars/frederik-wanink/sketches/STF1037.jpg
J59 10m2 10m4 1.5'' 205° 2015 CMi 07h13m09.27s +02°50'40.80"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Faint pair, but seen nicely. Blue-white stars, near equal, ~1.5", nearly wide
STT167 AB 7m4 10m9 5.1'' 163° 2017 Gem 07h13m30.95s +32°08'43.70"
Robert Zebahl
Leipzig (Germany)
70mm (133x) Too faint for a separation. Primary component visible, no sign of the companion. Observation from city at moon (83%).
Robert Zebahl
Leipzig (Germany)
152mm (270x) At a position angle of about 180° I sometimes had the feeling to see something of the faint companion, but not sure.
STF1048 9m1 10m1 5.9'' 351° 2018 CMi 07h14m14.25s +04°12'26.50"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Pretty wide, >1 delta mag, light orange stars
STF1033 AB 7m8 8m4 1.5'' 278° 2017 Lyn 07h14m48.05s +52°32'44.10"
AC 7m8 10m2 79.6'' 273° 2015
Robert Zebahl
Leipzig (Germany)
102mm (160x) The pair AB appears clearly separated, but still pretty tight with a well visible difference in brightness. The faint C component is wide apart at a similar position angle. ../projects/double-stars/robert-zebahl/sketches/2020-03-23_stf1033.jpg
BRT1227 9m9 11m7 8.1'' 321° 2015 CMi 07h15m03.14s +10°51'25.60"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Light yellow-orange A is easy to see, the B star is much fainter, can see with direct vision but sharpens with averted vision. Transparency is poor and the sky is bright with a waxing moon
STF1056 8m0 8m9 3.9'' 299° 2017 Mon 07h15m34.34s -01°51'36.80"
Mark McCarthy
Fremont (California/USA)
317mm (170x) Wide reddish pair.
★★ HJ3945 AB 5m0 5m8 26.8'' 50° 2015 CMa 07h16m36.84s -23°18'56.10"
Rene Merting
Drachhausen (Germany)
8x30 Winter-Albireo - ein eng stehendes Pärchen, ganz knapp getrennt - Komponente A im SW knallig orange, bei B ist schwer eine Farbnuance erkennbar, eher weißlich und deutlich schwächer als A
Rene Merting
Drachhausen (Germany)
10x50 ein knapp getrenntes Paar (nicht besser als im 8x30) - Komponente A leicht gelblich, B ist kühler, weißlich
Rene Merting
Drachhausen (Germany)
18x70 ein gut getrenntes Pärchen - Komponente A im Südwesten ist apfelsinenorange, B wirkt anfangs eisblau, bei längerer Betrachtung weißgrau
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x leuchtet Komponente A goldgelb, B im NO wirkt weiß ohne den erwarteten Farbstich, auch nicht bei 107x und auch nicht, wenn ich die Sterne leicht unscharf stelle - trotzdem sehenswert - auch bei 20x zeigen sich beide Sterne ordentlich voneinander getrennt, A strahlt jetzt noch tiefgelber, fast orange
Uwe Pilz
Leipzig (Germany)
105mm (37x) soforrt auffallend, blau-orange ../projects/double-stars/uwe-pilz/sketches/hj3945.jpg
Robert Zebahl
Leipzig (Germany)
120mm (23x) Evident, easy to split at large angular distance. Brighter component appeared very orange, fainter one bluish.
STT170 AB 7m4 7m7 0.6'' 288° 2018 CMi 07h17m38.51s +09°17'31.50"

../images/binary-star-orbits/STT170-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (333x) Notched, near equal at 333x. At 667x, hairline split very easy to see, near equal white stars
HEI725 10m5 10m7 1.1'' 349° 2016 CMi 07h18m06.19s +10°34'53.40"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Faint pair but sharp with seeing, nicely split ~1", less than half magnitude difference but it is noticeable. Nice pair
BRT1229 9m9 11m1 4.5'' 353° 2015 CMi 07h18m20.96s +10°50'07.40"
Mark McCarthy
Fremont (California/USA)
508mm (533x) B star needs averted vision to appear, widely separated ~4", faint light yellow A but there's a significant magnitude difference. [not physical]
BAL2265 AB 10m0 10m4 14.0'' 93° 2016 CMi 07h18m30.00s +03°27'37.00"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Faint, B actually needs averted vision to see well, very wide pair. conditions bad [not physical]
STF1068 AB 9m3 9m8 4.1'' 350° 2019 Gem 07h19m49.31s +13°22'22.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pumpkin orange pair, near equal magnitude, PA to north. Well separated ~4". Nice.
STF1050 AB 8m1 8m8 19.3'' 21° 2017 Lyn 07h19m51.29s +54°55'18.40"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Rather faint, obviously split with visible difference in brightness. View similar to STF 1062.
Robert Zebahl
Leipzig (Germany)
102mm (28x) ../projects/double-stars/robert-zebahl/sketches/2020-03-23_stf1050_stf1062.jpg
A2862 8m4 9m6 0.8'' 62° 2017 CMi 07h20m02.62s +03°46'36.50"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Very close, less than one disk width, 2 delta mag, light orange stars. Tough. Can't see B star at 667x
STF1066, delta Gem, 55 Gem 3m5 8m2 5.4'' 234° 2017 Gem 07h20m07.39s +21°58'56.40"

../images/binary-star-orbits/STF1066-orbit.jpg

Robert Zebahl
Leipzig (Germany)
55mm (71x) Large difference in brightness. The fainter component was well separated, but just a very tiny star.
Robert Zebahl
Leipzig (Germany)
102mm (160x) Easy to separate with relatively large distance. The companion appeared as a tiny, faint star.
Uwe Pilz
Leipzig (Germany)
105mm (288x) erster Ring in SSW heller, zweiter nur an dieser Stelle sichtbar
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wasat = Delta Geminorum: Pretty white-yellow and red-orange pair, PA to west, ~4".
A2863 9m3 9m5 1.2'' 288° 2015 CMi 07h20m09.95s -00°01'11.50"
Mark McCarthy
Fremont (California/USA)
203mm (333x) White near equal, very fine pair in dense field
STF1074 AB 7m4 7m8 0.8'' 172° 2015 CMi 07h20m31.07s +00°24'13.10"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Very nice, touching disks to hairline. White, near equal. Great! [There are three other fainter BU pairs not noticed.]
STF1073 7m9 10m2 9.0'' 67° 2015 CMi 07h21m00.62s +10°11'44.20"
Mark McCarthy
Fremont (California/USA)
508mm (553x) Pretty pair, wide, ~3 delta mag, blue-white A and ruddy B
STF1076 9m5 9m6 2.9'' 108° 2015 CMi 07h21m01.96s +04°03'23.60"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Very fine near equal white stars, well split
STF1070 AB 8m7 9m3 1.7'' 324° 2019 Gem 07h21m21.87s +34°01'36.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty close, 1.5", white, 1 delta mag, PA to NW.
STF1065, 20 Lyn 7m5 7m7 14.9'' 256° 2017 Lyn 07h22m15.11s +50°08'55.70"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Nicely split, moderate distance, similarly bright.
STF1062, 19 Lyn AB 5m8 6m7 14.8'' 316° 2018 Lyn 07h22m52.06s +55°16'53.30"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Clearly separated, moderate distance, noticeable difference in brightness. The colors seemed different, but not exactly definable.
Robert Zebahl
Leipzig (Germany)
102mm (28x) ../projects/double-stars/robert-zebahl/sketches/2020-03-23_stf1050_stf1062.jpg
Uwe Pilz
Leipzig (Germany)
105mm (21x) ../projects/double-stars/uwe-pilz/sketches/200409_19Lyn.jpg
Robert Zebahl
Leipzig (Germany)
152mm (22x) Easy to separate, but still quite close together with visible difference in brightness. Colorwise unremarkable.
J366 8m9 10m4 2.3'' 136° 2015 CMi 07h24m01.28s +12°04'27.40"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Pretty pairing, ~2.5", light yellow-orange A and a deepter yellow-orange B, 2 delta mag. Nice pair
STF1081 AB 7m7 8m5 1.9'' 234° 2019 Gem 07h24m08.94s +21°27'28.00"
AC 7m7 9m9 107.0'' 63° 2015
Robert Zebahl
Leipzig (Germany)
102mm (28x) AC: Rather wide apart from component A with noticeable difference in brightness. Less conspicuous.
Robert Zebahl
Leipzig (Germany)
102mm (86x) AB: At 86x just separated, very close together with moderate difference in brightness. In relation to A, the components B & C are almost opposite each other. At 125x, A & B are easy to split.
A2865 10m3 10m6 0.6'' 107° 1997 CMi 07h24m40.32s +05°16'51.00"
Mark McCarthy
Fremont (California/USA)
508mm (533x) At 533x i can tell is it not single, it's a bit smudgy, and with averted vision it clearly flashes an elongation. At 1067x I can't get a clean enough focus to resolve due to seeing
J1063 10m6 10m9 2.6'' 56° 2015 CMi 07h25m19.23s +03°12'10.70"
Mark McCarthy
Fremont (California/USA)
508mm (533x) B is on edge of direct vision, I can see some smudge there with direct vision but averted vision clears it up. ~2", 1.5 delta mag
STF1083 7m3 8m1 6.8'' 45° 2015 Gem 07h25m35.30s +20°29'42.60"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Unequal pair. At 22x very tight, at 44x well split. Fainter companion appeared slightly orange, brighter one white-bluish.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Equal wide, white.
Mark McCarthy
Fremont (California/USA)
317mm (553x) White, equal brightness, PA to NE.
HO346 AB 7m0 11m7 13.2'' 59° 2015 Gem 07h25m54.13s +18°08'51.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and much fainter blue B, ~10” 3 delta mag. Nice!
STF1090 AB 7m3 8m2 60.8'' 98° 2017 Gem 07h26m27.33s +18°31'00.80"
AC 7m3 9m5 49.9'' 79° 2015
BC 8m2 9m5 20.9'' 328° 2015
Mark McCarthy
Fremont (California/USA)
317mm (553x) AC: Pretty finder split, equal white. Is a 2+1 with 2x fainter BC.
Mark McCarthy
Fremont (California/USA)
317mm (553x) BC: Is a 2+1 with AC, C is 2 delta mag than fainter B.
A2866 9m3 10m0 0.6'' 138° 1991 CMi 07h26m39.08s +04°23'34.10"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) B seen only at the best moments, and very briefly as a very faint star ~0.5" sep and very much fainter than A star. Frustratingly tough since this should not be a problem usually except for tonight's poor transparency and average seeing
STF1095 8m6 9m3 10.3'' 78° 2015 CMi 07h27m22.75s +08°45'14.00"
Mark McCarthy
Fremont (California/USA)
203mm (333x) White stars, wide, 1 delta mag
STF1094 7m6 8m5 2.5'' 97° 2019 Gem 07h27m25.99s +15°18'59.00"
Robert Zebahl
Leipzig (Germany)
70mm (57x) At 57x barely split with noticeable difference in brightness. At 100x well split, but still tight.
S548 AC 7m0 8m9 35.1'' 277° 2015 Gem 07h27m40.54s +22°08'29.30"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein weit getrenntes Paar - Komponente A strahlt schwach gelblich … eher dunkelgelb - Komponente C im Westen von A ist gut 1.5 Magnituden schwächer und dunkelgrau bis lachsorange - der Doppelstern steht isoliert, fällt aber nicht übermäßig auf - zurück auf 20x ist das Paar weiterhin gut getrennt erkennbar
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange with a 2x fainter white star, PA slightly SW. AB is 12th mag and not seen
BU21, eta CMi 5m2 11m1 4.3'' 28° 2015 CMi 07h28m02.08s +06°56'31.50"
Mark McCarthy
Fremont (California/USA)
508mm (213x) Eta CMi: Easy bright yellowish star with a reddish much fainter B, wide
BAL1098 9m3 10m8 6.6'' 122° 2015 CMi 07h28m12.83s +00°35'16.90"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Easy pair, creamy white A and 3 delta mag B, wide
STF1103 7m1 8m6 4.2'' 244° 2019 CMi 07h30m33.61s +05°15'16.80"
Uwe Pilz
Leipzig (Germany)
105mm (137x) einfach, unscheinbar
Mark McCarthy
Fremont (California/USA)
317mm (170x) Pretty blue-white and orange-red stars, close but split.
STF1108 6m6 8m2 11.7'' 179° 2017 Gem 07h32m50.63s +22°53'15.40"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein sehr ungleiches enges Paar, aber klar getrennt - Komponente B im Süden ist knapp zwei Größenklassen schwächer - Komponente A buttergelb - zurück auf 20x verschmilzt Komponente B förmlich mit A zu einer sehr ungleichen 8, in guten Momenten sind beide Sterne aber dennoch schon getrennt sichtbar
Uwe Pilz
Leipzig (Germany)
105mm (130x) einfach
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange stars, 2 delta mag, PA to south, ~8"
STF1116 7m8 8m5 1.7'' 95° 2019 Gem 07h34m32.02s +12°18'16.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty tight white, near equal magnitude, 2-3", PA to east. Nice pair.
★★★ STF1110, alpha Gem, 66 Gem, Castor AB 1m9 3m0 5.4'' 53° 2019 Gem 07h34m35.86s +31°53'17.80"
AC 1m9 9m8 69.8'' 163° 2017
AD 1m9 10m1 179.8'' 221° 2017

../images/binary-star-orbits/STF1110-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
55mm (27x) AB: At 27x slight difference in brightness visible. Double star appeared as '8'. At 38x clearly split, but tight.
Robert Zebahl
Leipzig (Germany)
70mm (44x) AB: At 44x the double star appeared as an '8'. At 100x clearly split with noticeable difference in brightness. Both components appeared white.
Rene Merting
Drachhausen (Germany)
100mm (107x) AB: bei 32x wirkt der Stern leicht länglich - bei 107x stehen die beiden Sterne schön eng mit überlagernden Beugungsscheibchen, die Komponenten sind dennoch getrennt erkennbar - Komponente B im Osten ist eine halbe Magnitude schwächer - ganz schwacher Farbkontrast
Uwe Pilz
Leipzig (Germany)
105mm (144x) AB: blauweiß-weiß ../projects/double-stars/uwe-pilz/sketches/Castor.jpg
STT174 6m6 8m3 1.9'' 92° 2017 Lyn 07h35m56.00s +43°01'51.40"
Robert Zebahl
Leipzig (Germany)
70mm (133x) The obviously fainter component could be permanently seen in the right position angle as brightening on the first diffraction ring.
KU30 9m3 10m3 3.2'' 110° 2001 Gem 07h35m59.79s +34°19'41.10"
Mark McCarthy
Fremont (California/USA)
203mm (205x) About one delta mag, well split, slightly orange stars
STF1119 8m1 9m3 3.3'' 353° 2019 Gem 07h38m30.23s +33°42'41.40"
Mark McCarthy
Fremont (California/USA)
203mm (205x) V345 Gem, variable of the delta Scuti type. A is white with a pink tinge. B is light blue, about two delta mag, well split around 3"
★★ BRD2 AB 9m2 9m5 0.9'' 188° 2015 CMi 07h39m46.65s +05°16'25.50"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Wow! Exceptionally fine pair, white, near equal, nicely split, just outside of Procyon's glare. Great! [AB,C 14th mag not seen]
BGH3 AB 7m3 9m0 57.9'' 113° 2017 Mon 07h39m59.33s -03°35'51.00"
Rene Merting
Drachhausen (Germany)
18x70 beide Komponenten sind mit ordentlichem Abstand getrennt sichtbar - Komponente B im SO ist gut 1.5 Magnituden schwächer und wirkt gegen die strahlend weiße Komponente A eher graubraun
★★ STF1126 AB 6m5 7m0 0.9'' 176° 2017 CMi 07h40m06.99s +05°13'51.90"

../images/binary-star-orbits/STF1126-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (333x) A bit more delta mag than listed, split, white, rather bright pair
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wow, very close <1" hair-split, near equal brightness
AG143 9m1 10m1 5.7'' 98° 2015 CMi 07h41m10.49s +01°08'18.10"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Pretty orange and blue, light colors, wide, faint
STF1123 9m2 9m8 3.6'' 167° 2019 Gem 07h41m31.99s +33°24'34.80"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Pretty white pair, ~3", slightly less than two delta mag
STF1132 8m1 8m5 20.1'' 235° 2017 Mon 07h42m12.50s -03°31'10.40"
Rene Merting
Drachhausen (Germany)
18x70 ein dicht stehendes Pärchen - Komponente B im SW ist nur leicht schwächer - leichter Farbunterschied - STF1132 fällt eher als Doppelstern auf als der ebenfalls weiter westlich im Gesichtsfeld stehende Doppelstern Bgh
STT179, kappa Gem, 77 Gem 3m7 10m0 7.2'' 241° 2014 Gem 07h44m26.87s +24°23'53.30"
Robert Zebahl
Leipzig (Germany)
70mm (133x) Observation at nearly full moon: Fainter companion was not visible.
Rene Merting
Drachhausen (Germany)
100mm (213x) bei 213x mit viel Geduld ist blickweise Komponente B südwestlich von A im Beugungsscheibchen erkennbar - kaum wie ein Stern, einfach nur eine schwache Aufhellung
Robert Zebahl
Leipzig (Germany)
120mm (200x) Although the optics were not yet completely cooled down, the fainter component could be seen slightly outside the first diffraction ring as a tiny star in moments of steady air.
Mark McCarthy
Fremont (California/USA)
508mm (533x) Kappa Gem. A looks like a kaleidoscope with the mask, colorful. B is a nice fine 8th mag star, a white hard point. Well separated ~8"
A674 8m2 9m8 1.1'' 125° 2008 Gem 07h44m38.11s +31°06'50.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very close and faint, just split
STF1107 8m7 10m1 1.2'' 213° 1991 Cam 07h45m14.87s +75°47'51.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide separation, 1 delta mag, PA to NW.
HO246 7m6 11m6 2.6'' 227° 1991 Gem 07h45m32.14s +25°59'19.20"
Mark McCarthy
Fremont (California/USA)
508mm (533x) A is an orange star, pretty bright, B only shows with averted vision and I can barely it hold direct. ~2". white
STF1122 7m8 7m8 14.4'' 185° 2017 Cam 07h45m52.47s +65°09'28.10"
Rene Merting
Drachhausen (Germany)
320mm (45x) bei 72x ein gut getrenntes Pärchen zweier gleich heller Sterne - trotz vieler gleich heller Sterne im Gesichtsfeld wirkt das Doppel gut isoliert
HO247 7m7 9m2 0.4'' 259° 2010 Gem 07h46m07.95s +21°07'19.20"

../images/binary-star-orbits/HO247-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (533x) Clean split with seeing, 1 delta mag, fairly bright pair. I found the apodizing mask worked better than the 8-inch mask, gave more resolving power. The 8-inch was only snowman
STF1137 8m0 9m1 2.9'' 133° 2010 CMi 07h46m35.35s +04°07'50.10"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Light orange and blue, pretty wide, 1.5 delta mag
★★ STF1127 AB 7m0 8m4 5.6'' 340° 2019 Cam 07h47m00.43s +64°03'07.30"
AC 7m0 9m7 11.7'' 179° 2017
BC 8m4 9m7 17.0'' 173° 2017
Rene Merting
Drachhausen (Germany)
320mm (45x) AB: bei 45x ist B ganz dicht nördlich an A angrenzend erkennbar (knapp getrennt), B etwas heller als C im Süden - bei 72x wird die Trennung einfacher und alle drei Sterne stehen fast auf einer Linie
AC: bei 45x ist C ganz schwach südlich von A erkennbar - bei 72x schätze ich, etwas mehr als die doppelte Entfernung AB, C wirkt grau, während A und B weiß strahlen
STF1141 AB 8m4 9m4 17.5'' 10° 2017 CMi 07h47m02.47s +00°01'06.10"
Rene Merting
Drachhausen (Germany)
18x70 AB: ganz dicht nördlich über Komponente A ist B knapp getrennt als schwaches Murmelchen sichtbar, Helligkeitsunterschied schätzungsweise 1.5 Magnituden
AD: nordöstlich von A in vierfachem Abstand AB ist Komponente D als schwaches Lichtpünktchen D erkennbar
AE: Komponente E zeigt sich westlich von Komponente A in drei- bis vierfacher Entfernung wie AB, schwach
Rene Merting
Drachhausen (Germany)
100mm (32x) AB: Komponente B zeigt sich mehr als knapp getrennt nördlich von A - Komponente A ist doppelt so hell wie B
AD: Komponente D ist mir nordöstlich in vierfachem Abstand AB auch noch aufgefallen und ich konnte drei bis vier weitere schwache Sterne erkennen, sicherlich alles weitere Komponenten dieses Mehrfachsystems
HO36 9m8 9m9 0.6'' 306° 2008 Gem 07h47m34.74s +25°28'08.90"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Very finely split blue-white stars, very slight mag difference. Pretty tough
STF1140 7m0 8m7 6.4'' 273° 2015 Gem 07h48m22.61s +18°20'12.40"
Robert Zebahl
Leipzig (Germany)
70mm (44x) Easy to separate with quite clear difference in brightness.
Mark McCarthy
Fremont (California/USA)
508mm (205x) Easy pair, light orange A and light blue B, 1 delta mag, wide ~8"
STTA88 AB 7m5 8m9 57.1'' 2015 CMi 07h48m58.22s +00°39'42.90"
Rene Merting
Drachhausen (Germany)
18x70 ein einfacher Fernglas-Doppelstern - beide Komponenten sind gut sichtbar, weit getrennt voneinander - Komponente B im Norden ist gut 1.5 Magnituden schwächer - leichter Farbkontrast
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein mehr als bequem getrenntes Paar - Komponente B im Norden ist halb so hell wie A - zurück auf 20x weiterhin eine ordentliche Trennung
STF1144 AB 7m9 10m3 8.4'' 358° 2018 Gem 07h49m00.84s +28°34'26.40"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Fine pair, Bis a nice sharp hard point, very much fainter than yellowish A, widely separated ~8"
STF1149 7m8 9m2 21.7'' 41° 2017 CMi 07h49m29.79s +03°13'15.60"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x zeigt sich Komponente B gut getrennt nordöstlich von A - Helligkeitsunterschied 1.5 Magnituden
STF1147 9m7 9m7 2.2'' 175° 2019 Gem 07h50m19.69s +24°31'55.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very fine 2", equal magnitude blue-white pair, PA to south, ~2".
Mark McCarthy
Fremont (California/USA)
508mm (533x) Nice near equal blue-white stars, wide ~2.5" [not physical, surprisingly]
COU926 9m5 9m7 0.3'' 254° 2008 Gem 07h50m38.16s +19°44'04.20"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Very tentative notched, noticable mag difference, only with seeing. Can't go to higher mag due to seeing
STTA89 6m8 7m7 76.8'' 84° 2015 Gem 07h51m00.20s +31°36'48.70"
Robert Zebahl
Leipzig (Germany)
70mm (22x) At 22x widely separated with moderate difference in brightness. The primary component appeared whitish, at 44x rather white-yellowish. The companion appeared slightly orange.
BU101, 9 Pup 5m6 6m5 0.4'' 304° 2018 Pup 07h51m46.31s -13°53'52.80"

../images/binary-star-orbits/BU101-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (1067x) 9 Pup. Elongated to notched, orientation correct, light orange. Very tough. [B is coming off it's furthest orbit and will be exceptionally difficult in 10 years, but easier in 15 years]
COU928 9m2 9m7 5.6'' 99° 2019 Gem 07h52m40.85s +20°02'37.70"
Mark McCarthy
Fremont (California/USA)
508mm (533x) A is a light yellow-orange, easily 1 delta mag brighter than blue B. Wide, ~10"
STT182 7m8 7m9 0.9'' 2017 CMi 07h52m42.12s +03°23'02.20"

../images/binary-star-orbits/STT182-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (333x) Compact white pair, more near equal than Sky Tools says, white, easy split
Mark McCarthy
Fremont (California/USA)
317mm (553x) Moderately bright A with 4 much fainter wide and close stars, forms a right triangle.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very close, ~1", near equal brightness white.
WEI17 9m0 9m3 7.0'' 96° 2017 Gem 07h54m02.88s +14°56'54.10"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Dual ninth mag pair, white, slight mag difference, very wide
COU951 9m9 10m7 3.1'' 134° 2017 Gem 07h54m13.96s +27°53'02.40"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Difficult given poor seeing and transparency this night. A is considerably more bright about half delta than B, white stars, split
ES422 8m4 10m8 14.9'' 182° 2015 Gem 07h55m27.26s +29°09'30.70"
Mark McCarthy
Fremont (California/USA)
203mm (205x) B revealed with averted vision only, clearly seen with averted vision with yellowish A, pretty wide
STT185 7m1 7m3 0.4'' 22° 2018 CMi 07h57m16.39s +01°07'37.30"

../images/binary-star-orbits/STT185-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (1067x) Without the apodizing mask I get a clean split with seeing but constant split with the mask. Light orange stars, noticeable mag difference
STF1162 8m0 10m2 9.0'' 327° 2015 Cnc 07h57m22.66s +13°12'24.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and blue, pretty wide.
STF1167 9m8 11m8 12.2'' 229° 2015 Cnc 07h58m34.29s +16°28'09.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint pair, B seen with averted vision and seeing. 2 delta mag, near a bright star.
STF1170 8m7 9m1 2.4'' 108° 2019 Cnc 07h59m45.52s +13°41'19.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Close near equal pair, 2".
STF1171 6m5 9m9 2.0'' 326° 2015 Cnc 08h01m00.78s +23°34'59.20"
Rene Merting
Drachhausen (Germany)
100mm (213x) bei 142x schmiegt sich Komponente B an der Grenze zur Sichtbarkeit im Süden von Komponente A ganz dicht an den viel größeren Bruder, der ohne Beugungsringe auskommt - bei 213x zeigt sich B leicht abgesetzt von A
Robert Zebahl
Leipzig (Germany)
102mm (187x) Observation from the city at half moon. At magnifications between 187x and 280x I could see the very dim companion almost permanently near the first diffraction ring. But the diffraction ring itself was hardly visible. Main problem here was probably the low brightness of the companion.
Uwe Pilz
Leipzig (Germany)
105mm (200x) schwierig. Zu ahnen bei 144x ../projects/double-stars/uwe-pilz/sketches/200303stf1171.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and orange, 4 delta mag! very faint and close B
STF1173 AB 8m5 9m9 10.4'' 51° 2015 Cnc 08h01m23.12s +16°56'58.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide, pretty faint
SHJ86 AB 6m2 7m5 51.6'' 81° 2018 Cam 08h02m30.82s +63°05'25.20"
Rene Merting
Drachhausen (Germany)
320mm (45x) bei 45x weit getrennt - Komponente A ist samtgelb, B strahlt weiß - trotzdem beide Sterne weit auseinander stehen, sind sie als Sternpaar erkennbar, weil die Sterne im unmittelbaren Umfeld allesamt schwächer sind
HO349 AB 7m7 12m0 10.3'' 227° 2015 Cnc 08h02m32.77s +12°27'08.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Light orange star and extremely faint B star, a fuzz at the edge of visibility in the correct position angle, ~10" separation
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide separation, 3 delta mag, faint B.
ES291 8m6 11m8 6.4'' 348° 2017 Gem 08h02m44.02s +32°11'09.10"
Mark McCarthy
Fremont (California/USA)
203mm (205x) B seen with averted vision only, but flashed out clearly. Wide, ~7"
STT186 7m7 7m9 1.1'' 75° 2019 Cnc 08h03m18.52s +26°16'03.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Close, 1" but easy split, near equal dull white color.
BU581 AB 8m5 8m8 0.4'' 226° 2018 Cnc 08h04m23.10s +12°17'23.80"

../images/binary-star-orbits/BU581-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Light orange near equal, very small, elongated to notched.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange A is not quite round. Marginal
Mark McCarthy
Fremont (California/USA)
508mm (1067x) With apodizing mask. Beautiful clean split, almost wide, light orange stars, slight mag difference. There is a third 2x fainter star further out, might be plus one. Wow. [3rd is AB-C, 8.46/11.78 5.5"]
AG337 9m9 10m2 2.7'' 104° 2015 Gem 08h05m05.60s +28°27'22.50"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Split, very close near equal orange-yellow stars
STF1182 7m5 8m8 4.9'' 75° 2019 CMi 08h05m24.43s +05°49'38.90"
Mark McCarthy
Fremont (California/USA)
203mm (333x) A white, B a little ruddy, wide, 2 delta mag
Mark McCarthy
Fremont (California/USA)
317mm (553x) White and reddish, 1 delta mag, PA due east.
STF1181 8m3 9m3 5.1'' 141° 2019 Cnc 08h05m24.56s +08°11'58.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and blue, 3 delta mag, wide separation.
STF1177, 17 Cnc 6m7 7m4 3.6'' 350° 2019 Cnc 08h05m37.06s +27°31'46.90"
Robert Zebahl
Leipzig (Germany)
70mm (57x) Easy to separate, but still relatively close together. Well visible difference in brightness. Color of the components was not clearly visible. Nice view overall.
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 107x sehe ich ein knapp getrenntes schön eng stehendes Pärchen - Komponente B im Norden ist eine dreiviertel Größenklasse schwächer - das Weiß von A wirkt kühler - zurück auf 64x sehe ich eine Ameise mit dünnem Hals, in ruhigen Momenten zeigen sich beide Sterne sogar getrennt
Uwe Pilz
Leipzig (Germany)
105mm (144x) ../projects/double-stars/uwe-pilz/sketches/200303stf1177.jpg
Christopher Hay
Seeheim (Germany)
125mm (160x) Well split despite substantial turbulence in the atmosphere. Main component creamy yellow-white, companion pale blue. A very attractive colour contrast warranting a one-star rating.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt ../projects/double-stars/frederik-wanink/sketches/STF1177.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellowish, 1 delta mag, ~4"
STF1186 7m1 10m1 3.3'' 212° 2018 Cnc 08h08m49.61s +27°28'49.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 11 Cnc: Orange with very faint B, ~3"
STF1188 8m7 9m3 16.5'' 201° 2017 Cnc 08h09m23.95s +30°20'49.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide separation, near equal white.
STF1187 AB 7m2 8m0 3.1'' 20° 2019 Cnc 08h09m30.45s +32°13'18.80"

../images/binary-star-orbits/STF1187-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (57x) Split. Components very tight with noticeable difference in brightness.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and orange, 1 delta mag, 5"
BUP111 AB 6m6 9m3 80.9'' 49° 2016 Cnc 08h10m13.10s +25°50'40.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 13 Cnc. Wide separation, orange A.
STF1191 10m3 10m8 3.6'' 77° 2015 Cnc 08h10m47.59s +19°01'51.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint but well split, ~3", near equal pair
HJ777 AB 9m6 11m7 10.6'' 349° 2016 Cnc 08h11m29.33s +10°41'05.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very wide, faint
★★★ STF1196, zeta Cnc, 16 Cnc AC 5m3 5m8 6.3'' 51° 2019 Cnc 08h12m12.79s +17°38'51.20"
AB-C 4m9 5m8 6.0'' 64° 2018
AB 5m3 6m2 1.1'' 2018

../images/binary-star-orbits/STF1196-AB-C-orbit.jpg ../images/binary-star-orbits/STF1196-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (133x) The wide pair AB-C is already separable at 22x. The pair AB shows at 133x two clearly overlapping diffraction disks with small difference in brightness, but without any notch. ../projects/double-stars/robert-zebahl/sketches/2020-03-24_stf1196.jpg
Robert Zebahl
Leipzig (Germany)
102mm (86x) AB-C: Easy to separate. A: light grey, B: pale orange.
Stefan Loibl
Rosenheim (Germany)
102mm (164x) AB-C clearly split, AB obviously elongated but not split
Uwe Pilz
Leipzig (Germany)
105mm (288x) weißblau-gelb-gelb ../projects/double-stars/uwe-pilz/sketches/zetaCnc.jpg
Robert Zebahl
Leipzig (Germany)
120mm (67x) AB-C: Evident difference in brightness, easy to split. Both components of similar color.
Robert Zebahl
Leipzig (Germany)
120mm (200x) AB: Very tight. The Airy disks were still touching. Slight difference in brightness. Extremely beautiful triple star! ../projects/double-stars/robert-zebahl/sketches/2019-02-24_stf1196.jpg
Sarah Gebauer
Germany
150mm (83x) AB-C: bei 83x sind AB-C sauber getrennt, laut Atlas 2020 6,1'' Abstand, die Komponenten A und B mit 1,1'' lassen sich nicht trennen, viele schöne Feldsterne dabei ../projects/double-stars/sarah-gebauer/sketches/20200411%20Zeta%20Cnc%20DSk.jpg
Frederik Wanink
Itterbeck (Germany)
254mm (200x) AB-C: AB (1,1") nicht bemerkt ../projects/double-stars/frederik-wanink/sketches/STF1196.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: 2+1 system, the +1 star is HUT 1. STF 1196AB make a nice tight pair. They are all nearly the same magnitude, white & brilliant
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Triple, all near equal magnitude, yellow-white. AB ~0.8", hair split.
Mark McCarthy
Fremont (California/USA)
317mm (553x) AC: Triple, all near equal magnitude, yellow-white. AC ~6", wide split.
HUT1, zet Cnc Ca-Cb 6m2 7m1 0.3'' 233° 2018 Cnc 08h12m13.27s +17°38'51.60"

../images/binary-star-orbits/HUT1-Ca-Cb-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) not quite round, oval/olive shaped. It is the AB-C of STF 1196.
STF1197 9m0 9m7 1.8'' 101° 2019 Cnc 08h12m44.45s +29°32'30.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint pair, 1 delta mag, ~2".
STF1201 8m1 9m5 6.7'' 185° 2015 Cnc 08h12m52.51s +09°34'40.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty wide, 5", 1 delta mag.
STF1202 7m4 9m6 2.7'' 305° 2015 Cnc 08h13m34.20s +10°50'49.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice yellow-orange and 3 delta mag, B, same color, ~5-7"
H6 78 AC 6m4 10m9 63.3'' 300° 2015 Cnc 08h14m11.14s +17°40'33.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) very wide, bright white, 3 delta mag.
LEP30 7m7 9m8 31.8'' 238° 2015 Cnc 08h15m33.20s +11°25'51.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Light orange with faint white star of ~11th magnitude, wide separation
STF1210 AB 7m2 9m4 15.5'' 113° 2015 Hya 08h15m48.54s +02°48'05.00"
Rene Merting
Drachhausen (Germany)
18x70 mit etwas Konzentration ploppt südöstlich von A ein kleiner schwacher Lichtpunkt auf, der nicht richtig klar zu sehen ist - in ruhigen Momenten Trennung sichtbar - Komponente B ist mindestens 2 Größenklassen schwächer
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty wide greenish yellow pair, wide separation, 2 delta mag.
★★ STF1193 AB 6m2 9m7 42.4'' 90° 2015 UMa 08h20m40.32s +72°24'26.00"
Rene Merting
Drachhausen (Germany)
320mm (45x) bei 45x … oh wow, was für eine Farbe bei Komponente A - so ein intensives Gelb habe ich noch nirgends gesehen, gleißendes Rapsgelb - die deutlich schwächere Komponente B im Osten in weitem Abstand ist bei der Farbe von A eher uninteressant, B ist ohnehin nur grau schimmernd
STF1223, phi 2 Cnc 6m2 6m2 5.4'' 218° 2019 Cnc 08h26m47.08s +26°56'07.80"
Uwe Pilz
Leipzig (Germany)
105mm (88x) sehr schön, blauweiß-gelbweiß ../projects/double-stars/uwe-pilz/sketches/stf1223.jpg
STF1230 9m3 10m6 34.2'' 186° 2015 Cnc 08h28m25.95s +16°51'09.10"
Uwe Pilz
Leipzig (Germany)
105mm (200x) Komponente B nur indirekt. bei 88x erahnbar. ../projects/double-stars/uwe-pilz/sketches/200323STF1230.jpg
A551, LO Hya AB 7m0 7m1 0.4'' 63° 2018 Hya 08h28m29.16s -02°31'01.60"

../images/binary-star-orbits/A551-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (1067x) LO Hya. With apodizing mask. Easy split, noticeable half delta mag. Another fainter star further out likely +1 [The +1 is STF 1233 AB-C, 6.42/10.49 18.3". AB at furthest extent of orbit, will tighten considerably the next 20 years]
A2893 9m8 9m4 0.7'' 351° 2015 Hya 08h30m05.67s +05°13'03.90"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Closely split, noticeable ~1 delta mag, good pair
STF1243 7m8 9m4 1.7'' 233° 2017 Hya 08h33m53.79s +01°35'07.50"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Well split ~2", 2 delta mag, blue-white A and dull white B
★★ STF1245 AB 6m0 7m2 10.1'' 25° 2018 Hya 08h35m51.05s +06°37'13.90"
AC 6m0 10m7 100.4'' 109° 2017
AD 6m0 11m9 110.3'' 292° 2017
AE 6m0 9m6 114.8'' 207° 2017
Robert Zebahl
Leipzig (Germany)
70mm (57x) AB at 22x separated, but very close, uneven pair. A appeared white-yellowish, B orange, partly reddish. Opposite in a wide separation the fainter component E was visible. At 57x, A appeared white-yellowish, B orange. ../projects/double-stars/robert-zebahl/sketches/2020-03-24_stf1245.jpg
Rene Merting
Drachhausen (Germany)
100mm (32x) AB: bei 32x ein sehr enges Pärchen, gerade so getrennt - das Sternpaar ist heller, als viele andere Sterne in der unmittelbaren Umgebung, dadurch ist es sehr auffällig - Komponente A strahlt reinweiß, B steht dem in nichts nach, auch wenn die Komponente gut eine Magnitude schwächer ist
Uwe Pilz
Leipzig (Germany)
105mm (88x) AB ../projects/double-stars/uwe-pilz/sketches/200323STF1245.jpg
Mark McCarthy
Fremont (California/USA)
508mm (533x) AB: Wide and bright pair, light yellow and orange, easy, slight mag difference
AG154 9m6 9m8 2.7'' 2019 Cnc 08h36m55.78s +23°14'49.10"

../images/binary-star-orbits/AG154-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (533x) HO Cnc. Near equal well separated, light orange stars
J1008 10m9 11m1 3.1'' 20° 2002 Hya 08h39m23.43s -00°16'32.00"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Easy pair, not too faint, wide ~3", equal mag. [not physical]
STF1255 AB 7m3 8m6 26.0'' 30° 2015 Hya 08h39m43.80s +05°45'51.40"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 20x und 32x ein ordentlich getrenntes Sternpaar - Komponente B im NW strahlt nicht ganz so weiß wie A - Helligkeitsunterschied eine halbe Größenklasse (1.23 mag laut Stelle Doppie!)
STN61 8m4 9m4 4.6'' 203° 2015 Pyx 08h40m17.61s -32°09'54.90"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Near planetary nebula M3-6. Pretty blue and orange pair, close but well split.
★★ STF1254 AB 6m4 10m4 20.8'' 55° 2017 Cnc 08h40m22.11s +19°40'11.90"
AC 6m5 7m6 62.5'' 343° 2018
AD 6m5 9m2 83.5'' 44° 2017
Stefan Loibl
Rosenheim (Germany)
102mm (164x) septuple, visual quintuple, components A, B, C, and D split, E not visible, B not split, no colour contrast, at northern edge of Messier 44 (Praesepe)
BAL1852 11m0 11m0 14.3'' 2015 Hya 08h42m37.69s +02°14'25.30"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Not likely to be physical. Wide, half delta mag white stars [not physical]
STF1258 7m7 7m9 10.0'' 330° 2017 UMa 08h43m25.41s +48°51'41.90"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Easy to separate at 22x, similarly bright components at moderate distance. At 57x very small difference in brightness noticeable. The components appeared slightly orange and white-blueish, with the color changing from one component to another. A very strange effect, which I observed several times.
BAL2821 12m6 13m1 10.0'' 83° 2016 Hya 08h43m26.88s +03°40'13.00"
Mark McCarthy
Fremont (California/USA)
508mm (533x) A bit faint pair, half delta mag, wide [not physical]
STF1270 6m9 7m5 4.7'' 265° 2017 Hya 08h45m20.79s -02°36'03.70"
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 32x hatte ich schon den richtigen Verdacht, bei 64x ist es eindeutig, beide Sterne stehen knapp getrennt schön eng zusammen - Komponente A im Osten wirkt cremeweiß, B eher weißblau
Mark McCarthy
Fremont (California/USA)
508mm (533x) MX Hya. Wide, yellow-white, half delta mag. Nice
CBL32 7m4 10m7 41.0'' 174° 2015 Cnc 08h46m14.32s +27°35'41.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Dull orange with fairly faint 10.5 mag B, wide separation
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty yellow-orange 8th magnitude primary, with 3x fainter blue which can be seen direct vision but blinks like a planetary nebula, so must be 11-12th mag. Wide separation.
★★ STF1268, iota Cnc, 48 Cnc 4m1 6m0 30.7'' 308° 2018 Cnc 08h46m41.82s +28°45'35.60"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Striking, widely separated with noticeable difference in brightness. Moderate but beautiful color contrast: white-yellowish and grey-blueish.
Robert Zebahl
Leipzig (Germany)
102mm (28x) Grand sight! Pretty wide apart and unequal. A: decent orange, B: very nice light blue.
Stefan Loibl
Rosenheim (Germany)
102mm (164x) wide pair with nice colour contrast yellow/blue
Uwe Pilz
Leipzig (Germany)
105mm (144x) gelb-blaugrau ../projects/double-stars/uwe-pilz/sketches/iotaCnc.jpg
Sarah Gebauer
Germany
150mm (125x) bei 83x schon deutlich getrennt, der Farbkontrast ist gut zu sehen, er wird bei 125x noch stärker, ein zartes Blau und Gelb sind zu sehen ../projects/double-stars/sarah-gebauer/sketches/20200411%20i%20Cnc%20DSk.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) 80mm finder split, beautiful yellow and blue. Scope view real nice. Very good diffraction and airy disks.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Iot Cnc: Pretty orange and pale blue, showpiece object.
★★★ STF1273, 11 Hya, epsilon Hya AB-C 3m5 6m7 2.9'' 309° 2017 Hya 08h46m46.51s +06°25'07.70"

../images/binary-star-orbits/STF1273-AB-C-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (133x) Not split. Although a slight brightening was visible in the first diffraction ring, it could also have come from slight coma of the refractor.
Uwe Pilz
Leipzig (Germany)
105mm (200x) bei 144x schwierig ../projects/double-stars/uwe-pilz/sketches/200323epsHya.jpg
Mark McCarthy
Fremont (California/USA)
508mm (533x) Epsilon Hya A is bright orange-yellow, B is much fainter and a little blue, ~3". [SP 1 AB is 3.49/5.00 0.2" not seen]
STF1281 AB 7m8 9m0 53.1'' 310° 2017 Hya 08h47m36.90s +00°01'04.30"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein weit auseinander stehendes Paar - Komponente B im NW ist halb so hell und wirkt gräulich gegenüber der buttergelben Komponente A - zurück auf 20x ist B noch nicht zu schwach und immernoch gut getrennt von A erkennbar
BAL2347 AB 9m3 10m8 4.0'' 204° 2015 Hya 08h47m58.80s +03°07'39.50"
Mark McCarthy
Fremont (California/USA)
508mm (533x) B star considerably fainter needed averted vision to flash it out, but then hold it direct. Both stars a little blue, wide separation, half delta mag
BU335 7m5 9m4 2.6'' 265° 2017 Hya 08h48m12.24s +02°34'48.40"
Uwe Pilz
Leipzig (Germany)
105mm (200x) schwierig ../projects/double-stars/uwe-pilz/sketches/200323BU335.jpg
Mark McCarthy
Fremont (California/USA)
508mm (333x) Close, ~3", 2 delta mag.
Mark McCarthy
Fremont (California/USA)
508mm (533x) 3 delta mag, well split ~3", very pleasing pair, white A and slightly red B
STT194 7m4 10m5 12.6'' 57° 2015 Hya 08h48m18.30s +00°33'18.10"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Orange A and blue B, 3 delta mag, very wide [not physical]
AGC3, rho Hya 4m4 11m9 12.1'' 146° 2015 Hya 08h48m25.98s +05°50'16.40"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Rho Hya Bright white A star and much fainter B star, but it's still a hard bluish point very fine. Nice one
A2550 9m5 9m8 0.4'' 204° 1996 Hya 08h48m35.67s +03°04'05.20"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Wow exceptionally fine pair. B is very faint but can hold direct vision after flashing it out using averted vision. Very close, hairline split, amazing pair. At 1067x the stars dim a little can still see B but need averted vision all the time
A2552 9m1 8m5 0.3'' 208° 2018 Hya 08h48m40.30s +00°56'31.00"

../images/binary-star-orbits/A2552-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (533x) Wow fine split. Pale yellow A and blue B, about one delta mag. Nice split, amazing [82.4 year period]
J74 11m2 11m3 9.3'' 126° 2017 Hya 08h50m23.22s +01°24'47.20"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Faint near equal, bluish, pretty wide. Forms part of a triangle with similar magnitude stars [not physical]
BAL2351 9m3 10m6 14.2'' 110° 2016 Hya 08h50m30.10s +03°32'34.30"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Easy wide pair, B star is very blue. One delta mag. [not physical]
STF1282 AB 7m6 7m8 3.5'' 279° 2019 Lyn 08h50m44.28s +35°04'15.40"
Robert Zebahl
Leipzig (Germany)
70mm (57x) Clearly separated, but close together with very little difference in brightness. The double star forms an acute-angled triangle together with two other stars.
STF1275 AB 8m7 8m9 1.9'' 198° 2019 UMa 08h51m26.19s +57°31'38.10"
Robert Zebahl
Leipzig (Germany)
70mm (100x) At 100x and 150x not permanently split. Components very close together.
BAL2354 9m9 11m7 8.5'' 40° 2015 Hya 08h51m27.36s +02°55'49.80"
Mark McCarthy
Fremont (California/USA)
508mm (533x) B is quite faint, need averted vision to notice it, but then can hold direct, 3 delta mag, pretty wide, ~8" [not physical]
STF1290 7m4 9m2 2.8'' 325° 2017 Hya 08h52m03.40s +04°27'58.00"
Mark McCarthy
Fremont (California/USA)
508mm (533x) White stars, wide, 2 delta mag
A2900 6m4 9m5 0.7'' 310° 2004 Hya 08h52m24.18s +05°20'25.20"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Elongated or olive shape, not quite notched, certainly a double but difficult, in poor conditions
HJ460, 53 Cnc AB 6m5 11m7 43.7'' 335° 2003 Cnc 08h52m28.60s +28°15'33.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 53 Cnc: Orange primary and 2x fainter blue, wide separation (this is AB). There is a second orange-yellow star of about the same magnitude very wide separation (this is AC).
A2752 9m0 11m0 5.1'' 231° 2016 Hya 08h53m26.66s +05°12'47.20"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Easy wide pair, B is 1.5 delta mag and very blue
STF1292 AB 9m3 9m5 6.1'' 189° 2017 Hya 08h53m46.02s -00°34'41.60"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Near equal, wide, ~6". Very faint star ~20" may be plus one [it is, UC 1728 AC, 9.32/13.42 27.8"]
STT195 AB 7m7 8m3 9.8'' 139° 2017 Cnc 08h53m57.80s +08°25'17.70"
Robert Zebahl
Leipzig (Germany)
70mm (80x) At 22x very nicely separated with a small difference in brightness. The components are still pretty tight. Altogether a rather dim double star. At 80x the color difference is well visible: primary component appears slightly orange, the companion pale blue.
STF1291, 57 Cnc AB 6m1 6m4 1.6'' 309° 2019 Cnc 08h54m14.65s +30°34'45.80"
AB-C 5m5 9m2 54.6'' 204° 2015

../images/binary-star-orbits/STF1291-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (133x) AB: Immediately apparent as a double star. Diffraction disks overlapping slightly ('8'). Difference in brightness visible.
Uwe Pilz
Leipzig (Germany)
105mm (144x) gelb ../projects/double-stars/uwe-pilz/sketches/57Cnc.jpg
Sarah Gebauer
Germany
150mm (125x) AB: sowohl bei 83x als auch bei 125x knapp vorm Trennen
Mark McCarthy
Fremont (California/USA)
203mm (205x) AB: 57 Cnc. Very nice pair, strong orange yellow colors, ~1 delta mag, bright, nice close split
BAL1430 10m1 11m0 11.5'' 110° 2015 Hya 08h54m37.08s +01°27'00.30"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Faint, wide, noticeable not-quite-half magnitude difference [not physical]
STF1289 8m2 8m9 3.7'' 2019 Lyn 08h54m44.33s +43°35'04.70"
Robert Zebahl
Leipzig (Germany)
70mm (57x) Quite faint double star, but easy to separate with a noticeable difference in brightness and close components.
STF1280 AB 8m8 9m1 3.4'' 358° 2018 UMa 08h55m24.82s +70°47'39.20"

../images/binary-star-orbits/STF1280-AB-orbit.jpg

Rene Merting
Drachhausen (Germany)
100mm (72x) ein knapp getrenntes Sternpaar - beide Sterne sind annähernd gleich hell und strahlen rein weiß - bei 144x eine ordentlichere Trennung, Komponente A im Süden strahlt in einem wärmeren Weiß
ARG21, AC UMa 10m0 10m4 21.4'' 106° 2015 UMa 08h55m51.01s +64°58'21.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Two very faint stars, wide separation, ~0.5 delta mag, to south of an orange star.
STF1294, SIN41 STF1294 AB 9m0 10m8 15.6'' 340° 2015 Cnc 08h57m17.08s +32°53'57.90"
SIN41 AC 9m0 12m6 191.3'' 285° 2015
Robert Zebahl
Leipzig (Germany)
102mm (28x) STF1294 (AB): At 28x relatively widely separated and rather less striking near the bright star sigma 2 Cnc. Component A appeared slightly orange, the companion only as a dim star. Similar view at 86x.
★★ BU408 7m3 9m6 2.8'' 345° 2018 UMa 08h59m00.62s +63°25'42.80"
Rene Merting
Drachhausen (Germany)
100mm (142x) bei 107x ist nordöstlich von A ein Helligkeitspeak erkennbar, aber nicht richtig greifbar - bei 142x dann zeigt sich in ruhigen Momenten die schwächere Komponente knapp abgesetzt von A - großer Helligkeitsunterschied, mindestens 2.5 Größenklassen
Mark McCarthy
Fremont (California/USA)
317mm (553x) BU 408 is the fainter star in a pair pair of near equal stars in finder view, red-orange color. In the scope the B is a blue star 3" out from the orange star.
HJ2477, iot UMa A-BC 3m1 9m2 2.4'' 90° 2017 UMa 08h59m12.45s +48°02'30.60"

../images/binary-star-orbits/HJ2477-A-BC-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (213x) Iota UMa = Talitha. Using 25mm occulting bars with barlow, no mask, putting the bright star's diffraction spikes under the bars, I can see the hard point of the B star, brighter & closer than Procyon B outside of A's glare. One other field star. [HJ 2477's period is 2735 years. The short period is BC is HU 628 9.90/10.10 0.9" 39 year period -- how in the world did he see that?]
STF1296 9m1 9m9 1.9'' 76° 2019 Lyn 08h59m16.74s +34°56'46.90"
Robert Zebahl
Leipzig (Germany)
102mm (160x) Overall quite faint double star, but clearly separated with a moderate difference in brightness. Both components are still pretty close together.
STF1302 AB 9m3 9m5 2.7'' 233° 2017 Hya 09h01m12.87s +02°44'44.40"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Near equal easy pair, ~2.5"
STF1298, 66 Cnc AB 6m0 8m6 4.4'' 137° 2017 Cnc 09h01m24.13s +32°15'08.30"
AC 6m0 12m0 187.6'' 318° 2015
Robert Zebahl
Leipzig (Germany)
70mm (80x) AB: At 67x and 80x the companion is visible as a very faint star close to the main component. At 133x it is only visible as a slightly blurred tiny star just outside the first diffraction ring of the primary component.
Robert Zebahl
Leipzig (Germany)
102mm (62x) AB: At 62x clearly separated, significant difference in brightness. The companion can be seen well as a faint little star, apart from the primary component. At 125x easy to split. Component A appeared rather white.
Mark McCarthy
Fremont (California/USA)
203mm (205x) AB: 66 Cnc. Excellent pair. A is a pure white, B is much fainter and seems red to purple color, nicely separated
SHJ101, 67 Cnc 6m1 9m2 103.9'' 329° 2015 Cnc 09h01m48.84s +27°54'09.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 67 Cnc. White pair, 2 delta mag, wide.
A1585, kap UMa 4m2 4m5 0.3'' 285° 2017 UMa 09h03m37.56s +47°09'24.00"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Kappa UMa = Talitha australis: With apodizing mask. Much glare but snowman seen steadily inside the mess. Looks like Eta Carina nebula, with a larger bulge toward us and the smaller bulge pointed up and away. No field stars at this magnification, went down to 533x to notice one for the sketch
STF1308 8m1 9m2 10.5'' 85° 2016 Hya 09h04m59.50s -03°59'15.10"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x zeigt sich ein enges Sternpärchen, Komponente B im Osten ist eine knappe Größenklasse schwächer
AG161 10m1 10m6 4.3'' 225° 2018 Cnc 09h05m39.99s +32°26'35.80"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Very fine white pair, nicely split in the scene, near equal. [sadly it is not physical]
STF1309 8m5 8m4 11.7'' 273° 2016 Hya 09h06m38.25s +02°49'06.30"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein Musterdoppelstern, wie er im Buche steht - zwei gleich helle Sterne eng aneinander geschmiegt, knapp getrennt - ganz leichter Farbkontrast, aber nicht definierbar
AG162 9m8 10m1 4.1'' 107° 2018 Cnc 09h07m10.98s +30°38'30.10"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Pretty, near equal off white stars, ~4" [not physical]
STF1311 AB 6m9 7m1 7.8'' 199° 2019 Cnc 09h07m27.01s +22°58'51.10"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Milk white A and off-white, yellowish B, ~1 delta mag, well separated
POU3029 10m1 10m4 8.1'' 315° 2018 Cnc 09h08m09.79s +23°52'42.90"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Wide separation, white stars, about half delta mag
STTA97 8m3 8m3 51.5'' 274° 2018 Cnc 09h08m27.16s +27°32'35.30"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Finder split, near equal white.
Mark McCarthy
Fremont (California/USA)
317mm (553x) 80mm finder view shows an arc of three stars. westernmost star is a wide equal pair in the telescope.
WRH16, xi Cnc 5m7 6m2 0.2'' 108° 1944 Cnc 09h09m21.53s +22°02'43.60"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) nicht als DS gesehen
★★ STF1306, sigma 2 UMa, 13 UMa AB 4m9 8m8 4.3'' 348° 2016 UMa 09h10m23.53s +67°08'03.30"
AC 4m9 10m3 197.8'' 148° 2003

../images/binary-star-orbits/STF1306-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (100x) AB: Companion almost permanently visible as elongated, non-condensed brightening of the first diffraction ring of the primary component at the correct position angle.
Uwe Pilz
Leipzig (Germany)
105mm (144x) AB: sehr schwierig bei 88x ../projects/double-stars/uwe-pilz/sketches/200316stf1306.jpg
STF1322 8m3 8m7 1.7'' 53° 2017 Cnc 09h12m40.15s +16°31'30.20"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Fine white pair, well split ~2", 1 delta mag
STF1315 7m3 7m7 24.9'' 27° 2017 UMa 09h12m45.94s +61°40'32.70"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Medium bright double star, easy to separate with attractive distance and slight difference in brightness. Together with 16 UMa in one field of view. The brighter component appeared slightly orange, the fainter one showed a hint of blue. However, the colors of the components changed over time. At 57x similar view.
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x gibt es nix zu meckern, ein bequem getrenntes Pärchen - Komponente B im NO ist maximal eine halbe Größenklasse schwächer - leichter Farbkontrast - noch schöner bei 20x, auffällig im Umfeld
BRT155 AB 9m8 10m6 4.6'' 270° 2018 Cnc 09h12m51.05s +24°20'29.60"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Almost need averted vision to hold the B star but can manage it direct after a bit of effort. Pretty wide ~4", 2 delta mag. [Not physical. However A is Aa,Ab, 10.45/10.45 0.5", not seen.]
STF1320 9m5 10m5 12.0'' 216° 2015 Lyn 09h13m21.20s +42°19'45.90"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Easy, wide, yellow-white A and blueish B. [not physical]
AG163 10m2 10m7 5.1'' 320° 2015 Cnc 09h13m34.97s +24°03'25.30"
Mark McCarthy
Fremont (California/USA)
203mm (333x) A fine near equal wide pair, ~5", 10th mag. [surprisingly not physical]
STF1318 7m8 9m5 2.4'' 228° 2018 UMa 09h13m38.79s +46°59'25.30"
Robert Zebahl
Leipzig (Germany)
70mm (133x) Separated with clear difference in brightness. The faint companion is slightly outside the first diffraction ring of the primary component.
TDS6428 10m4 10m5 0.4'' 299° 1991 Lyn 09h15m38.21s +39°42'50.40"
Mark McCarthy
Fremont (California/USA)
508mm (533x) B flashes with averted vision only, extremely close split
STF1332 7m9 8m1 5.9'' 29° 2015 Cnc 09h17m19.21s +23°39'09.80"

../images/binary-star-orbits/STF1332-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (333x) Near equal wide pair, ~5", maybe half delta mag
STF1336 7m0 11m1 40.1'' 180° 2015 Hya 09h17m32.92s +00°33'17.80"
Uwe Pilz
Leipzig (Germany)
105mm (144x) sehr weit, kein Doppelstern-Eindruck ../projects/double-stars/uwe-pilz/sketches/200323STF1336.jpg
STF3121 AB 7m9 8m0 0.5'' 205° 2017 Cnc 09h17m53.45s +28°33'37.70"

../images/binary-star-orbits/STF3121-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (533x) IP Cnc Split at 533x, used 1067x to recheck orientation. With apodizing mask. Light yellow-orange stars, nice and clean split, very slight mag difference. Real nice
STF1333 6m6 6m7 1.9'' 50° 2017 Lyn 09h18m25.97s +35°21'51.30"
Robert Zebahl
Leipzig (Germany)
63mm (120x) At 93x seen as '8', at 120x split, but pretty tight with no visible difference in brightness.
Uwe Pilz
Leipzig (Germany)
105mm (200x) fast gleich hell, beide gelblich, bei 66x schwierig ../projects/double-stars/uwe-pilz/sketches/stf1333.jpg
Mark McCarthy
Fremont (California/USA)
508mm (333x) Brilliant white pair, near equal, ~2" separation
STF1334, 38 Lyn AB 3m9 6m1 2.5'' 229° 2017 Lyn 09h18m50.64s +36°48'09.30"

../images/binary-star-orbits/STF1334-AB-orbit.jpg

Uwe Pilz
Leipzig (Germany)
60mm (198x) Aufhellung im ersten Ring
Robert Zebahl
Leipzig (Germany)
63mm (140x) Fainter companion only seen as permanent brightening on the first diffraction ring. ../projects/double-stars/robert-zebahl/sketches/2019-01-22_stf1334.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) gelb, trennbar bei 66x ../projects/double-stars/uwe-pilz/sketches/38Lyn.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) 38 Lyn: Very bright A with 3x fainter dull white B, 3-4"
Mark McCarthy
Fremont (California/USA)
508mm (333x) 38 Lyn. A is a bright light yellow and B is a ~2 delta mag orange-yellow, well split and bright
STF1339 9m2 9m9 1.5'' 65° 2017 Lyn 09h20m58.39s +36°43'09.60"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Faint B but still easily seen, resolves nicely with seeing, almost 2 delta mag, ~1.5"
STF1338 AB 6m7 7m1 1.1'' 314° 2017 Lyn 09h20m59.40s +38°11'17.90"

../images/binary-star-orbits/STF1338-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (333x) Wonderful light yellow stars, near equal, ~1" separation
ES1541 10m4 11m2 8.2'' 23° 2015 Lyn 09h22m05.95s +39°58'00.70"
Mark McCarthy
Fremont (California/USA)
508mm (333x) White and dull white pair, ~1 delta mag, wide ~8"
★★ STF1347 7m3 8m3 21.1'' 312° 2016 Hya 09h23m15.76s +03°30'05.00"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein auffälliges Sternpaar - Komponente B im Nordwesten ist gut abgesetzt erkennbar und ca. ein 3/4 Größenklasse schwächer - bei 20x rücken die beiden Sterne richtig schön zusammen und sind noch knapp getrennt erkennbar
Uwe Pilz
Leipzig (Germany)
105mm (88x) sehr schöner Farbkontrast ../projects/double-stars/uwe-pilz/sketches/200323STF1347.jpg
AG165 9m9 10m1 1.4'' 16° 2017 Leo 09h23m19.01s +22°10'45.30"
Mark McCarthy
Fremont (California/USA)
203mm (333x) A is white and hazy (in poor conditions) and B flashes into view with averted vision
STF1344 9m0 9m5 3.8'' 104° 2018 LMi 09h23m28.35s +39°08'05.10"
Robert Zebahl
Leipzig (Germany)
120mm (75x) At 50x and 75x split, but tight with little difference in brightness.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint near equal par, ~5". Nice.
STT201 AB 8m5 9m5 1.4'' 206° 2017 Leo 09h23m54.50s +27°54'00.00"

../images/binary-star-orbits/STT201-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (205x) Extremely fine split, with seeing only, finest of the night, significant mag difference, just above 1" separation
★★ STF1348 AB 7m5 7m6 2.0'' 314° 2018 Hya 09h24m28.48s +06°21'01.80"
Uwe Pilz
Leipzig (Germany)
105mm (144x) Im selben Aufsuchfeld wie stf1355, ähnliche Erscheinung ../projects/double-stars/uwe-pilz/sketches/200323STF1348_55.jpg
Mark McCarthy
Fremont (California/USA)
203mm (333x) Very pretty half delta mag, ~2" pair, white. Sharp despite low declination
BU105, kap Leo AB 4m6 9m7 2.0'' 209° 2015 Leo 09h24m39.28s +26°10'56.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Kappa Leonis: Very tough but palpable split. Seeing needed to settle to perfection for primary to resolve to just an airy disk without diffraction or flaring, and for a couple of seconds could see the much fainter ~10th magnitude B star as a pin-point, ~2" separation. Fleeting view.
BU105, kappa Leo, 1 Leo AB 4m6 9m7 2.0'' 209° 2015 Leo 09h24m39.28s +26°10'56.80"
AB 4m6 9m7 2.0'' 209° 2015
Uwe Pilz
Leipzig (Germany)
105mm (180x) Begleiter sitzt im ersten Ring
★★ STT200 6m5 8m6 1.3'' 334° 2016 UMa 09h24m55.67s +51°34'26.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Light orange A, B a deeper orange, maybe because it's 2-3x fainter. B resolves from within A's diffraction when seeing settles, ~1". Wow!
AG166 9m1 11m1 3.6'' 74° 2018 Hya 09h26m45.80s +01°04'57.40"
Mark McCarthy
Fremont (California/USA)
203mm (333x) B balrey seen with direct vision, brighted with averted vision. Pretty. ~1-2 delta mag, ~4"
A128 9m6 10m0 1.3'' 262° 2017 Hya 09h26m52.30s -03°14'42.00"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Fine pair, but need to wait for seeing for split. ~1" and half delta mag, white stars
★★ STF1355 7m7 7m8 1.8'' 357° 2018 Hya 09h27m16.69s +06°13'59.00"

../images/binary-star-orbits/STF1355-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (144x) Im selben Aufsuchfeld wie stf1348, ähnliche Erscheinung ../projects/double-stars/uwe-pilz/sketches/200323STF1348_55.jpg
Mark McCarthy
Fremont (California/USA)
203mm (333x) Light yellow pair, near equal, very nice, ~2"
STF1353 9m9 10m0 3.3'' 125° 2017 Leo 09h27m39.28s +15°44'32.00"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Faint & hazy in poor conditions; elongated haze split with seeing, near equal
Mark McCarthy
Fremont (California/USA)
317mm (553x) Well separated near equal 9th magnitude white stars, ~4"
TDS6583 10m8 10m9 0.5'' 71° 1991 Lyn 09h28m23.15s +39°54'56.70"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Just split with seeing, very tight, noticeable mag difference ~0.5-1, orange stars
STF1356, ome Leo 5m7 7m3 0.9'' 114° 2018 Leo 09h28m27.41s +09°03'24.40"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Omega Leo. Elongated & notched, similar magnitude, yellow-orange stars
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very close but clean split, in each other's diffraction, half delta mag, white.
H4 47, 3 Leo 5m8 11m1 25.2'' 80° 2015 Leo 09h28m29.19s +08°11'18.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange star with well separated white B, 2 delta mag.
41 Lyn, S598 AB 5m5 7m8 69.7'' 160° 2017 UMa 09h28m39.99s +45°36'06.50"

This star has the designation 41 Lyn but is assigned to UMa. At the time, when Flamsteed numbered the stars, the constellation boundaries were not exactly defined. Another example is 10 UMa, which is located in Lyn today.

Robert Zebahl
Leipzig (Germany)
8x40 Fairly well split with fainter component.
BAL2364 10m0 10m5 8.7'' 140° 2015 Hya 09h29m16.38s +03°05'44.00"
Mark McCarthy
Fremont (California/USA)
203mm (333x) A bit more than half delta mag, wide stars. B is faint, nearly needs averted vision
BU591 7m8 8m9 1.0'' 29° 2017 Hya 09h29m36.43s -03°07'20.40"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Very nice pair. Split with seeing, noticable mag difference, hairline only
STF1360 AB 8m9 8m9 13.8'' 242° 2017 Leo 09h30m35.95s +10°36'06.40"
Mark McCarthy
Fremont (California/USA)
203mm (205x) GS Leo. Wide, light orange-yellow, near equal
Mark McCarthy
Fremont (California/USA)
317mm (553x) Unremarkable wide separation 8th mag stars.
STF1349 7m5 9m0 19.2'' 166° 2015 UMa 09h31m09.89s +67°32'28.40"
Christopher Hay
Seeheim (Germany)
60mm (25x) At 25x a wide split, substantial difference in brightness, B a fine pinprick of light. B appears light blue at first, but colour impression disappears quickly - an interesting visual effect repeated several times. According to Stelledoppie a true physical pair. Nice together with Struve 1350 in same FOV. A very fine double-double for very small apertures.
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x stehen beide Sterne bequem getrennt auseinander - Komponente B im Süden ist eine knappe Größenklasse schwächer und kupfergrau - ein schönes Doppel-Doppel zusammen mit STF1350 gut 47' weiter südsüdöstlich
Uwe Pilz
Leipzig (Germany)
105mm (88x) sichtbar bei 21x ../projects/double-stars/uwe-pilz/sketches/200316stf1349.jpg
Rene Merting
Drachhausen (Germany)
320mm (45x) bei 45x steht das Pärchen gut auseinander - Komponente B ist eine dreiviertel Größenklasse schwächer und wirkt grauweiß - A ist weiß mit einem zarten Stich ins Gelbe
STF1365 7m4 8m0 3.5'' 156° 2017 Hya 09h31m31.26s +01°27'55.10"
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 64x ist eine 8 erkennbar - in guten Momenten präsentieren sich beide Sterne knapp getrennt - Komponente B im SO ist eine halbe Größenklasse schwächer
Mark McCarthy
Fremont (California/USA)
203mm (333x) Wide off-yellow pair, ~4", ~1.5 delta mag
STF1351, 23 UMa AB 3m6 9m2 22.7'' 267° 2015 UMa 09h31m31.57s +63°03'42.50"
AC 3m7 11m8 107.4'' 232° 2015
Rene Merting
Drachhausen (Germany)
100mm (32x) AB: bei 32x ist A gleißend, B im Westen extrem schwacher Lichtpunkt, gut 4-5 Größenklassen schwächer - bei 64x kann ich A ein wenig gebändigt erkennen und hat einen leichten Stich ins Gelbliche, B ist ordentlich abgesetzt
Mark McCarthy
Fremont (California/USA)
317mm (270x) AB: 23 UMa. Lovely yellow-white and 3x fainter wide B, white.
Rene Merting
Drachhausen (Germany)
320mm (45x) AB: bei 45x ist Komponente B schwach sichtbar neben dem gelblich strahlenden 23 UMa - großer nicht abschätzbarer Helligkeitsunterschied
SHJ107, 6 Leo 5m2 9m3 37.1'' 77° 2018 Leo 09h31m57.58s +09°42'56.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) A star is light orange & 3 delta mag to B star which is a white, well separated point
STF1364 AB 8m6 9m7 16.4'' 155° 2015 Leo 09h32m01.52s +20°02'49.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Unremarkable wide separation faint stars
HN 29 6m5 12m1 27.8'' 263° 2015 Leo 09h33m18.32s +28°22'04.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very wide, very faint B star. Not very exciting.
★★ STF1350 AB 8m3 8m3 10.2'' 249° 2015 UMa 09h34m19.56s +66°47'42.30"
AC 8m3 9m2 131.0'' 216° 2015
Christopher Hay
Seeheim (Germany)
60mm (25x) AB: Tight but nicely split at 25x. No colour whatsoever seen. A appears brighter than B, whereby the data do not support this – perhaps a product of different (yet not seen) colouration? According to Stelledoppie not a physical pair. Attractive together with Struve 1349 in same field of view.
Rene Merting
Drachhausen (Germany)
100mm (32x) AB: bei 32x ein schönes enges Paar zweier gleich heller Sterne, knapp getrennt - STF1350 AB bildet mit vier ähnlich hellen Sternen westlich ein Muster, ähnlich einer Sense
AC: bei 32x bildet STF1350 AB mit vier ähnlich hellen Sternen westlich ein Muster, ähnlich einer Sense - der erste der vier Sterne bzw. der nächststehende Stern südsüdwestlich mit mehr als zehnfachem Abstand AB ist Komponente C, er ist schätzungsweise eine halbe Größenklasse schwächer
Uwe Pilz
Leipzig (Germany)
105mm (88x) AB: trennbar bei 21x. Fast gleichell, aber deutlicher Farbkontrast, lohnend. ../projects/double-stars/uwe-pilz/sketches/200316stf1350.jpg
Robert Zebahl
Leipzig (Germany)
152mm (100x) At 22x, all three components are already visible, with A & B still standing quite close together. Component C is less prominent. At 69x and 100x, the pair AB shows a nice color contrast: The eastern component mostly appeared in a slightly shiny orange, while the other component appeared more white-blueish. During the observation, however, the colors changed between both components. At the time of observation, the pretty bright comet C/2019 Y4 Atlas was also in the same field of view - a great scene! Note to the sketch: The positions of the stars to each other do not exactly match, also the alignment of the pair AB to C. ../projects/double-stars/robert-zebahl/sketches/2020-03-18_stf1350_c2019_y4_atlas.jpg
Rene Merting
Drachhausen (Germany)
320mm (45x) AB: bei 45x ein schönes enges Paar zweier gleich heller Sterne, beide strahlen weiß
STF1369, DI Lyn AB 7m0 8m0 25.0'' 150° 2018 Lyn 09h35m22.50s +39°57'47.70"
Mark McCarthy
Fremont (California/USA)
508mm (333x) DI Lyn Very wide and bright light yellow stars, ~1 delta mag. [did not notice COU 2084 Aa,Ab, 6.98/8.79 0.2"]
STF1371 AB 7m9 10m2 8.2'' 275° 2015 Hya 09h35m25.26s +03°54'19.40"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Nice yellowish A, widely separated from nealry three delta mag B
HU1128, 11 LMi 4m8 12m5 6.7'' 61° 2012 LMi 09h35m39.50s +35°48'36.40"

../images/binary-star-orbits/HU1128-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) 11 LMi: Very faint A & extremely faint B, wide separation. From the orbital chart this is approaching maximum elongation now (May 2017), by 2143 it will be 1". Only 39 light years away.
H5 58, 7 Leo 6m3 9m4 41.0'' 90° 2014 Leo 09h35m52.88s +14°22'46.50"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Finder split, wide, white, 2 delta mag.
ES428 9m3 11m2 13.2'' 203° 2015 Leo 09h36m31.37s +28°20'23.20"
Mark McCarthy
Fremont (California/USA)
203mm (205x) B pops out with averted vision, widely separated. A is white, and I can barely hold b direct. At the end of an attractive curve of four stars of similar magnitude
STT204 AB 6m7 10m7 8.3'' 99° 2015 Leo 09h38m45.69s +10°46'39.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Hard white A with B a haze, sharpened to point with averted vision. Well separated, 3 delta mag.
STF1374 AB 7m3 8m7 2.8'' 311° 2017 LMi 09h41m21.88s +38°57'01.90"

../images/binary-star-orbits/STF1374-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
120mm (168x) At 50x elongated, at 75x seen as '8'. At 168x clearly split with obviously fainter component.
Mark McCarthy
Fremont (California/USA)
508mm (333x) Pretty orange-yellow stars, ~2 delta mag, ~3 separation
STT206 8m3 11m4 17.9'' 224° 2015 Leo 09h42m18.84s +17°04'55.60"
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB is the widely separated ~1 delta mag. star, about 40". There's fainter star popping out with averted vision in between them, which is the AD pair, 11th mag.
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB is the widely separated ~1 delta mag. star, about 40". There's fainter star popping out with averted vision in between them, which is the AD pair, 11th mag.
STT205 8m0 12m6 12.0'' 202° 2018 Lyn 09h42m29.17s +40°58'25.20"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Yellow and orange pair ~1 delta mag.
ES301 9m8 11m8 5.0'' 243° 2018 Lyn 09h42m42.81s +40°17'30.90"
Mark McCarthy
Fremont (California/USA)
508mm (333x) B appears fine and clear with averted vision, blue color, and can then barely hold it with direct vision. Light yellow A. Very nice
A2761 9m0 9m2 1.0'' 252° 2017 Sex 09h43m29.38s +06°12'27.70"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Attractive yellow-orange A and bluish B, well separated, about three delta mag
A2560 8m8 9m8 1.1'' 18° 2017 Sex 09h50m02.86s +01°47'37.20"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Challenging faint close companion suspected with 333x, but seen well with 533x. With seeing, light orange A and blue B, ~2 delta mag, ~1" separation
HO369 AB 8m0 9m8 0.4'' 99° 2011 LMi 09h51m09.34s +36°29'20.80"

../images/binary-star-orbits/HO369-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (1067x) With 533x I can tell this is not single, but the elongation is too tentative. At 1067x the best I can manage is elongated notched, with seeing. Seeing and transparency are not good enough
STT208, phi UMa 5m3 5m4 0.5'' 304° 2017 UMa 09h52m06.36s +54°03'51.40"

../images/binary-star-orbits/STT208-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (260x) länglich, schwierig
A2139 8m0 10m7 2.0'' 292° 2015 LMi 09h52m15.53s +40°58'13.40"
Mark McCarthy
Fremont (California/USA)
508mm (333x) White A and blue B, ~2" separation, >2 delta mag. [not physical]
AC5, gam Sex AB 5m4 6m4 0.5'' 41° 2016 Sex 09h52m30.47s -08°06'17.70"

../images/binary-star-orbits/AC5-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (533x) Gamma Sex: I get a split with seeing of nearly equal orange yellow stars, only momentarily
STT209 7m4 10m3 4.9'' 310° 2017 UMa 09h53m17.23s +50°37'16.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Light orange-yellow disk with faint diffraction ring. Extremely faint blue B ~4" can see it direct vision but it flashes forth with averted.
S605, 9 Sex 6m9 8m4 53.5'' 287° 2016 Sex 09h54m06.70s +04°56'43.50"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein weit auseinander stehendes Pärchen, das trotzdem schön anzusehen ist - Komponente B im Nordwesten ist gut 1.5 Magnituden schwächer - A samtgelb, B kupfergrau - zurück auf 20x sind beide Sterne auch noch komfortabel getrennt - die Farbe von A ist noch intensiver, jetzt eher rapsgelb
STF1399 7m7 8m4 30.2'' 176° 2017 Leo 09h57m02.21s +19°45'44.60"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Easy to split with nice distance and obviously unequal. A conspicuous group of fainter stars is nearby. Main component appeared in a warm-white, fainter somehow darker (partly bluish, partly slightly orange).
Uwe Pilz
Leipzig (Germany)
105mm (53x) wie ein Schlangenbiß
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint pair, tough find dense with stars. 1 delta magnitude, wide separation.
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/STF%201399.png
STF1398 8m1 11m4 4.1'' 102° 2017 UMa 10h01m32.06s +68°43'05.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near M81 & M82! Did not see the 11th mag, 3" B star, tried really hard. To the south is a tight = red pair.
★★ STT210 8m5 9m1 1.3'' 257° 2016 UMa 10h02m35.64s +46°21'42.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow A and white B, very tight. Faint, seeing needs to be perfect to see B in the diffraction.
HU631 8m0 9m3 0.8'' 258° 2017 LMi 10h03m59.08s +32°38'48.80"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Bright orange-yellow A star, B is a very small, faint blue point, ~1" separation, very much fainter ~3 delta mag
TDS6998 11m1 11m4 0.8'' 297° 1991 Leo 10h04m05.09s +27°26'54.30"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Elongation flashing with averted vision, but its hazy, not clear
STF1406 8m4 9m4 0.7'' 219° 2017 LMi 10h05m38.57s +31°05'13.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very tight, kissing when seeing stills, 1 delta mag. white
★★ A2142 8m0 8m8 1.1'' 295° 2016 LMi 10h05m43.55s +41°02'42.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very fine, split, ~1-1.5". 8th magnitude and 1.5 delta mag B, close split, very nice pair. In the 80mm finder this is one of a triangle of equal magnitude stars.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very tight but clear split, ~1", 1 delta mag. A slightly green, B a little orange.
STF1405 7m3 11m8 22.0'' 252° 2015 LMi 10h05m55.92s +39°34'55.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 8th and 10th magnitudes. B is blurry with direct vision and flashes with averted. Wide split. A is white with a little yellow.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow-white A, fairly faint blue B wide separation.
TDS569 10m9 11m1 2.3'' 89° 2017 Leo 10h06m33.24s +26°01'34.50"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Easy, near equal blue-white stars, >2" separation [not physical]
COU166 10m5 10m5 2.5'' 159° 2013 Leo 10h07m15.20s +22°15'17.20"
Mark McCarthy
Fremont (California/USA)
508mm (333x) B flashes into view with averted vision. Close pair ~2" separation
alpha Leo, 32 Leo, Regulus STFB6 AB 1m4 8m2 175.5'' 308° 2016 Leo 10h08m22.31s +11°58'01.90"
HDO127 AD 1m4 12m1 195.3'' 274° 2015
HDO127 BC 8m2 13m2 2.1'' 95° 2015
Rene Merting
Drachhausen (Germany)
100mm (32x) AB: bei 32x ist B weit abgesetzt von A erkennbar - Regulus präsentiert sich strahlend weiß - B ist nur schwach weiß - kein echtes Doppelsternfeeling
Uwe Pilz
Leipzig (Germany)
105mm (288x) AB: sehr weit; einfach
Rene Merting
Drachhausen (Germany)
320mm (72x) AD: Komponente D ist südwestlich von B (STFB6) erkennbar, etwas weiter von A entfernt als B, klein und unscheinbar
Rene Merting
Drachhausen (Germany)
320mm (72x) AB: bei 72x extrem weit getrennt erkennbar - Komponente A ist weißblau, die wesentlich schwächere Komponente B strahlt weißgrau
STF1407 10m2 10m6 4.9'' 51° 2018 UMa 10h09m01.98s +64°26'40.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal faint 10th-11th mag white stars, 4"
A1988 10m0 9m8 0.4'' 223° 2008 Leo 10h09m04.77s +25°31'03.20"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Clean split with seeing, light orange stars, fairly equal but noticeable magnitude difference
A2144 9m8 11m6 2.7'' 287° 2015 Leo 10h09m09.51s +21°15'29.90"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Light yellow-white A and B is easily seen, ~2" separation, yellow, almost two delta mag
STF1413 9m8 9m8 1.8'' 270° 2019 Leo 10h12m18.72s +16°20'54.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very close ~2", very faint equal pair.
Mark McCarthy
Fremont (California/USA)
508mm (333x) Very pretty equal pair, white, close ~1.5"
STT213 AB 8m6 9m8 1.1'' 121° 2017 Leo 10h13m08.88s +27°25'10.50"

../images/binary-star-orbits/STT213-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (277x) Bright yellow A, ~2 magnitudes fainter B, very wide separation.
STF1417 9m2 9m3 2.4'' 78° 2019 Leo 10h15m08.60s +19°07'27.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint, close, but well split pair, 3", B resolves better with averted vision.
Mark McCarthy
Fremont (California/USA)
508mm (333x) Equal yellow-white pair, ~2"
HU1254 AB 10m1 10m4 0.6'' 15° 2016 Leo 10h15m10.48s +11°52'43.50"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Elongated to hairline split. Noticeable magnitude difference
STT215 7m2 7m5 1.5'' 176° 2019 Leo 10h16m16.05s +17°44'24.60"

../images/binary-star-orbits/STT215-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (133x) Appeared partly separated, partly as '8'. Brightness seemed to be equal.
Uwe Pilz
Leipzig (Germany)
105mm (288x) trennbar bei 120x
Mark McCarthy
Fremont (California/USA)
317mm (277x) very close split (1.7" separation) near equal bright white stars
Mark McCarthy
Fremont (California/USA)
508mm (333x) Near equal light yellow stars, ~1.5"
SHY552 7m4 8m8 107.2'' 2015 LMi 10h16m38.13s +41°16'33.00"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Pair of stars in a perfect triangle of widely separated stars looking like Leo's rump. ~8th, 8.5, and 9th mag.
STFA18, zet Leo 3m5 6m0 331.3'' 337° 2015 Leo 10h16m41.41s +23°25'02.40"
Rene Merting
Drachhausen (Germany)
100mm (32x) ein helles extrem weit getrenntes Paar - zwischen A im SO und B im NW sind etwas versetzt noch zwei schwache Sterne zu erkennen, aber beide ohne Bezug zu STFA18
BVD81 5m8 10m0 79.6'' 28° 2015 Leo 10h16m41.83s +25°22'14.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very wide 2-3 delta mag yellow-orange & whitish-yellow.
STF1419 8m9 9m9 4.5'' 225° 2019 Leo 10h17m02.94s +10°06'51.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint pair, 1 delta mag, PA west ~4-5"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Light yellow-white A and slightly blue B, wide ~4", ~1 delta mag
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/STF%201419.png
STT523, 39 Leo 5m8 11m3 7.9'' 300° 2017 Leo 10h17m14.53s +23°06'22.30"
Rene Merting
Drachhausen (Germany)
100mm (213x) bei 142x habe ich das Gefühl, Komponente B ab und an westlich von A ganz schwach im ersten Beugungsring ausmachen zu können, aber noch unsicher - bei 213x dann zeigt B sich eindeutig und kann ab und an auch mal länger gesehen werden
Mark McCarthy
Fremont (California/USA)
317mm (553x) Unremarkable star with wide, very faint B
Mark McCarthy
Fremont (California/USA)
508mm (333x) 39 Leo. ! Nice bright light yellow-orange A star. B is very small, very faint, ~8" separation, a single little point, barely has its own light
STF1415 AB 6m7 7m3 16.6'' 168° 2018 UMa 10h17m50.61s +71°03'38.90"
Rene Merting
Drachhausen (Germany)
320mm (45x) bei 45x ein eng stehendes ordentlich getrenntes Paar - Komponente B im Süden wirkt weißgrau gegen die gut eine halbe Größenklasse hellere A-Komponente - das Paar sieht schick aus, es wird von drei schwächeren Sternen umrahmt
A2369 8m5 9m7 1.0'' 296° 2017 Leo 10h17m59.92s +17°11'11.90"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Needed higher magnification to get it. Orange star with a faint but nice star in first diffraction ring, much fainter, ~1". Nice
STF1421 8m2 9m1 4.6'' 330° 2017 Leo 10h18m05.54s +27°31'27.90"
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 64x ein schönes enges knapp getrenntes Pärchen - Komponente B im NW ist gut eine Größenklasse schwächer und wirkt dadurch dumpfer
Mark McCarthy
Fremont (California/USA)
317mm (553x) Not difficult, 1 delta mag, 5" or so. Bluish.
Mark McCarthy
Fremont (California/USA)
508mm (333x) Wide pair, >1 delta mag, white tinged with yellow, ~5"
Berthold Fuchs
Wiesbaden (Germany)
130mm difficult DS ../projects/double-stars/berthold-fuchs/photographs/STF%201421.png
STF1420 9m1 10m6 2.2'' 318° 2015 LMi 10h18m33.30s +39°06'37.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint orange and 2 delta mag B ~2".
COU170 11m1 11m8 0.7'' 122° 1985 Leo 10h18m41.27s +21°55'22.80"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Can't see the pair but there seems to be two galaxies in the field. [NGC 3189 & 3187]
STF1423 9m4 10m1 0.7'' 308° 2018 Leo 10h19m10.64s +20°33'48.10"

../images/binary-star-orbits/STF1423-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Tough! Elongated to hairline split.
Mark McCarthy
Fremont (California/USA)
508mm (533x) Split with seeing, light orange A and very faint, ~3 delta mag B, very close, within diffraction ring <1"
★★ STF1424, gamma Leo, 41 Leo, Algieba AB 2m4 3m6 4.9'' 126° 2019 Leo 10h19m58.35s +19°50'29.40"

../images/binary-star-orbits/STF1424-AB-orbit-solution-1.jpg ../images/binary-star-orbits/STF1424-AB-orbit-solution-2.jpg

Robert Zebahl
Leipzig (Germany)
55mm (38x) At 38x split, but very tight with noticeable difference in brightness. At 56x and higher beautiful view of both components, which seemed to have similar colors. ../projects/double-stars/robert-zebahl/sketches/2019-02-09_gamma_leo.jpg
Robert Zebahl
Leipzig (Germany)
55mm (59x) Very nice unequal double. A appeared yellow-orange, B rather white-bluish. ../projects/double-stars/robert-zebahl/sketches/2019-03-09_gamma_leo.jpg
Christopher Hay
Seeheim (Germany)
60mm (58x) At 25x Algieba is already very elongated. At 58x a sliver of dark between the components, with clear brightness difference. At 70x split becomes more stable, but view not so pleasing as at 58x. Both components display vivid orange.
Robert Zebahl
Leipzig (Germany)
70mm (100x) At 67x still a relatively close pair, but well separated with quite a clear difference in brightness. At 100x easy to separate and visible color difference: A yellowish to slightly orange, B white-yellowish.
Stefan Loibl
Rosenheim (Germany)
102mm (164x) very bright double star, slight colour contrast
Uwe Pilz
Leipzig (Germany)
105mm (120x) schon bei 37x sehenswert; trennbar bei 55x; orange-blauweiß
Robert Zebahl
Leipzig (Germany)
120mm (66x) At 48x easily seen as double star. It appeared as '8'. At 66x pretty tight with visible difference in brightness.
Sarah Gebauer
Germany
150mm (83x) bei 83x sauber