Double Stars

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/Multiple Stars 1677
Visual Observations 2470
Sketches 208
Photographs 75
Observers 11
Berthold Fuchs, Christopher Hay, 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)
★★★ WZ Cas, STTA254 AB 7.4 8.3 58.0'' 89° 2017 Cas 00h01m15.85s +60°21'19.00"
Rene Merting
Drachhausen (Germany)
16x70 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) Nice double star. Brighter component appeared orange, the fainter more bluish.
Rene Merting
Drachhausen (Germany)
100mm (20x) 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) Splendid view. Primary component clearly orange, secondary blue. ../projects/doublestars/robert_zebahl/sketches/2019-08-22_wz_cas.jpg
Joerg S. Schlimmer
Germany
127mm (136x) Sehr schöner Farbkontrast ../projects/doublestars/joerg_schlimmer/sketches/Zeichnung_WZ_Cas_filtered_96dpi.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) WZ Cas: Pretty, deep orange A and very wide half delta mag B, white.
Rene Merting
Drachhausen (Germany)
320mm (45x) 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/doublestars/robert_zebahl/photographs/2019-07-16_wz_cas.jpg
STF3053 AB 6.0 7.2 15.2'' 71° 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 7.7 9.5 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 Nordosten 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 8.1 9.1 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 7.3 10.3 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 6.2 9.7 5.1'' 170° 2015 And 00h04m36.60s +42°05'33.20"
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 64x erst 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 6.7 9.3 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) gut getrenntes Paar, bei der Komponente B im Nordwesten gut 2 Größenklassen schwächer strahlt - beide Sterne warm weiß
FOX103 6.2 10.7 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 7.6 9.4 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 STT 547
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and blue, pretty, well separated.
BU9001 AC 6.7 10.6 21.0'' 235° 2016 And 00h05m09.75s +45°13'44.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint companion, wide separation.
STT547 AB 9.0 9.2 6.0'' 190° 2018 And 00h05m41.03s +45°48'43.30"
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
STF3061 8.4 8.5 7.8'' 149° 2016 Peg 00h05m44.45s +17°50'25.00"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein knapp getrenntes Pärchen - Komponente B im Südosten 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/doublestars/berthold_fuchs/photographs/STF3061.png
STF3060 AB 9.3 9.7 3.4'' 136° 2016 Peg 00h05m55.56s +18°04'34.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very close, ~3", equal brightness, pretty faint.
HU502 7.7 10.6 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 6.4 7.3 1.5'' 2018 Cas 00h06m15.81s +58°26'12.50"
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/doublestars/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 340x 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 7.0 7.7 158.5'' 268° 2015 And 00h09m03.67s +40°50'34.30"
Robert Zebahl
Leipzig (Germany)
8x40 Large distance with significant difference in brightness.
GIC2 AB 7.8 11.5 29.6'' 237° 2015 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 6.7 6.9 0.9'' 17° 2018 Cep 00h09m20.18s +79°42'52.40"
Uwe Pilz
Leipzig (Germany)
105mm (198x) Schneemann-Figur. Abstand 0“91
Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt ../projects/doublestars/frederik_wanink/sketches/STF2.jpg
STF5, 34 Psc 5.5 9.4 7.7'' 160° 2014 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 7.8 9.1 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
ARY8 AB 8.1 8.6 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 8.0 8.5 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 6.3 10.4 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 8.0 8.6 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 6.1 7.5 11.5'' 148° 2018 Psc 00h14m58.84s +08°49'15.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and white, ~1 delta mag, PA to S.
★★ HJ1947 AB 6.2 9.8 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 7.7 8.8 5.9'' 41° 2015 Cas 00h16m41.65s +54°39'36.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White and blue-white, wide.
BU392 5.7 12.5 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 AB-C 7.1 7.7 4.0'' 235° 2016 Psc 00h17m24.50s +08°52'34.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) near equal white pair, well split, B ~1/2 delta mag, PA to SW.
ES41 8.0 11.2 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 7.8 8.4 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 6.1 10.1 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 8.2 9.4 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 7.0 10.3 104.0'' 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 7.3 8.3 1.9'' 290° 2018 And 00h20m54.10s +32°58'40.90"
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 7.5 9.9 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 6.4 11.2 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 8.3 8.6 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 8.3 8.9 145.9'' 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 6.9 9.7 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 7.0 8.9 13.2'' 316° 2018 Cas 00h27m12.45s +49°59'08.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Obvious wide bright pair.
STT10 AC 6.5 9.5 274.3'' 156° 2015 Psc 00h27m31.02s +16°01'31.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White A with ~3 delta magnitude B, very wide separation.
STT10 AB 6.5 10.2 114.2'' 240° 2015 Psc 00h27m31.02s +16°01'31.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) B a very wide separation to W, 4 delta mag
HJ322, 12 Cet AB 5.9 10.2 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 5.2 13.1 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 6.1 8.4 0.3'' 290° 2009 Cas 00h30m19.91s +59°58'39.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) No deformation noticed
BU394 AB 8.5 8.8 0.8'' 279° 2018 Cas 00h30m45.56s +47°31'47.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very fine, pop split with seeing, near equal.
STF33 8.8 8.9 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 6.9 8.4 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 6.0 9.3 55.3'' 86° 2012 And 00h31m25.64s +33°34'53.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange, pretty bright star, bluish / fainter widely separated B
STT12, lam Cas 5.3 5.6 0.2'' 210° 2010 Cas 00h31m46.32s +54°31'20.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Lambda Cas: Maybe out of round? Marginal
BU1227 AB 7.2 10.6 2.8'' 193° 2015 Cas 00h32m21.78s +58°20'19.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and 3 delta mag B, orange, comes into view direct vision but only with seeing, 2-3".
BU1227 AC 7.2 11.8 22.4'' 80° 2015 Cas 00h32m21.78s +58°20'19.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint star, 1 delta mag fainter than B, widely separated, PA 90 degrees from AD
BU1227 AD 7.2 11.7 30.9'' 112° 2015 Cas 00h32m21.78s +58°20'19.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint star, 1 delta mag fainter than B, more widely separated than C, at 90 degrees PA from C
STF39 AB-C 7.1 8.7 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 6.7 8.5 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.
STF45 AB 6.8 10.1 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 5.6 10.5 12.3'' 22° 2015 Cas 00h39m09.89s +49°21'16.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) wide and faint.
STF46, 55 Psc 5.6 8.5 6.6'' 192° 2014 Psc 00h39m55.57s +21°26'18.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange with wide separated blue B.
STF47 AB 7.2 8.8 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 7.2 11.1 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 7.8 8.1 5.5'' 334° 2016 Cas 00h42m40.01s +71°21'57.30"
Robert Zebahl
Leipzig (Germany)
70mm (57x) At 22x almost split, clearly elongated with constriction. 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 6.7 11.3 42.3'' 128° 2015 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 8.3 8.9 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 7.2 7.4 48.0'' 46° 2017 And 00h46m24.34s +30°56'33.50"
Robert Zebahl
Leipzig (Germany)
8x40 Large distance with visible difference in brightness. I used a tripod.
Mark McCarthy
Fremont (California/USA)
317mm (277x) equal magnitude orange pair, wide.
H5 82 AB 8.0 8.3 57.2'' 75° 2017 Cas 00h47m24.62s +51°05'45.90"
Robert Zebahl
Leipzig (Germany)
70mm (26x) Almost equally bright components with large angular distance.
STF59 AB 7.2 8.1 2.3'' 148° 2016 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.
★★★ eta Cas, 24 Cas STF60 AB 3.5 7.4 13.4'' 325° 2016 Cas 00h49m06.29s +57°48'54.70"
STF60 AC 3.5 11.4 225.0'' 260° 2000
STF60 AD 3.5 12.8 189.4'' 354° 2011
STF60 AE 3.5 10.2 75.6'' 126° 2015
STF60 AF 3.5 11.5 378.3'' 276° 2000
STF60 AG 3.5 9.5 419.7'' 259° 2012
STF60 AH 3.5 8.4 701.1'' 355° 2012
SMR2 AI 3.5 11.6 90.3'' 73° 2012
SMR2 AJ 3.5 12.3 237.1'' 262° 2012
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/doublestars/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
65 Psc, STF61 6.3 6.3 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 8.5 8.8 0.9'' 256° 2018 Cas 00h50m25.10s +50°37'49.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Neat near equal orange and yellow. Split with seeing, 1".
BU232 AB-C 8.5 10.1 24.5'' 300° 2018 Cas 00h50m25.10s +50°37'49.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) C 2 delta mag fainter than B, about 25" separated, is the +1 star with BU232AB
BU781 8.4 9.3 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 7.7 11.1 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 8.0 8.0 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 AC 8.6 8.9 3.9'' 134° 2017 Cas 00h52m49.22s +56°37'39.50"
AD 8.6 9.7 9.0'' 194° 2017
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.
★★ BU1 AB 8.6 9.3 1.5'' 83° 2016 Cas 00h52m49.22s +56°37'39.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 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
BU497 AB 4.8 9.8 146.0'' 170° 2015 Cas 00h53m04.28s +61°07'24.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Super wide and faint.
STF73, 36 And AB 6.1 6.5 1.1'' 334° 2018 And 00h54m58.02s +23°37'42.40"
Uwe Pilz
Leipzig (Germany)
105mm (198x) ganz einfach
Frederik Wanink
Itterbeck (Germany)
254mm (640x) hell ../projects/doublestars/frederik_wanink/sketches/36And.jpg
BU1098, ups 1 Cas AB 5.0 12.5 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
ES940 AB 7.3 10.1 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.
164 And, STF79 6.0 6.8 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 6.6 10.8 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 7.1 7.8 0.4'' 64° 2018 Cas 01h01m30.15s +69°21'30.70"
Mark McCarthy
Fremont (California/USA)
317mm (885x) Elongated to notched with seeing
BU396 6.1 8.6 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 6.1 9.5 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"
STF90, 77 Psc AB 6.4 7.3 33.0'' 84° 2018 Psc 01h05m49.22s +04°54'31.20"
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 6.4 10.6 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
STF91 7.4 8.6 4.3'' 315° 2018 Cet 01h07m10.99s -01°43'55.60"
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 2.2 13.0 108.4'' 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 7.5 7.8 0.8'' 143° 2018 Cas 01h10m34.31s +51°00'47.80"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) Mehrfachsystem ../projects/doublestars/frederik_wanink/sketches/BU235.jpg
HJ634 7.3 12.7 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 4.3 11.3 126.4'' 143° 2012 Cas 01h11m06.16s +55°08'59.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Super wide and faint.
HO215, 45 And 6.6 6.6 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 7.9 8.9 0.9'' 287° 2018 Cas 01h12m41.24s +65°00'32.90"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) scheint enger als 0,9" ../projects/doublestars/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 7.0 8.1 19.6'' 249° 2016 Psc 01h12m52.98s +32°04'31.70"
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 6.3 10.5 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 6.5 8.8 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 5.2 6.3 22.8'' 64° 2018 Psc 01h13m43.80s +07°34'31.80"
Robert Zebahl
Leipzig (Germany)
200mm (37x) Visually evident as double star and easy to find. Well split with slight difference in brightness.
HJ636 7.4 11.8 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 5.2 7.8 47.1'' 331° 2018 Cet 01h14m24.04s -07°55'22.20"
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.
STF108 6.5 9.6 6.4'' 62° 2017 And 01h18m47.00s +37°23'10.60"
Robert Zebahl
Leipzig (Germany)
120mm (75x) Easily split with big difference in brightness.
STF105 AB 8.8 9.8 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 9.6 9.7 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 6.5 7.0 1.6'' 22° 2018 Cet 01h19m48.30s -00°30'32.50"
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 5.1 12.3 48.4'' 209° 2015 Cas 01h20m04.91s +58°13'53.80"
AC 5.1 7.0 132.8'' 235° 2014
AD 5.1 10.3 179.0'' 288° 2015
AE 5.1 10.4 170.4'' 239° 2015
Uwe Pilz
Leipzig (Germany)
105mm (288x) AB: kein Dreifachstern erkennbar, obwohl so ausgewiesen
S397, 35 Cas 6.3 8.6 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
STF115 AB 7.1 7.3 0.5'' 160° 2018 Cas 01h23m21.27s +58°08'35.60"
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 7.9 9.3 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
STF122 6.7 9.5 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"
S398 AB 6.3 8.0 69.0'' 100° 2015 Psc 01h28m22.92s +07°57'40.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) orange with 1 delta mag white to east.
ES4 8.1 9.1 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 8.1 10.4 11.4'' 310° 2015 Cas 01h31m41.16s +61°02'34.30"
Uwe Pilz
Leipzig (Germany)
105mm (288x) einfach
STT31 6.5 10.6 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.
STF138 AB 7.5 7.6 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 7.3 9.0 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
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.
BU1103, 44 Cas AB 5.8 12.1 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.
STF155 AB 7.9 8.0 4.9'' 325° 2018 Psc 01h44m15.19s +09°29'02.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice near equal brightness white pair, ~5"
ARN55, V773 Cas AD 6.3 9.9 160.5'' 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.
STF151 10.6 11.0 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 9.0 11.2 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 9.4 10.4 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
STF162 AB 6.5 7.2 2.0'' 199° 2018 Per 01h49m15.47s +47°53'47.10"
Robert Zebahl
Leipzig (Germany)
70mm (100x) At 100x partly split, otherwise '8'-shaped. At 128x clearly split. Difference in brightness noticeable.
STF162 AC 6.5 9.2 20.3'' 178° 2018 Per 01h49m15.47s +47°53'47.10"
Rene Merting
Drachhausen (Germany)
16x70 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
1 Ari, STF174 6.3 7.2 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 (100x) Very nice view. Both Well split, relatively tight with noticeable difference in brightness.
Robert Zebahl
Leipzig (Germany)
200mm (100x) SQM-L 20.8: Nice double star with big difference in brightness.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty orange and blue pair, ~2 delta mag, ~2".
STF175 AB 9.0 9.4 28.6'' 2018 Ari 01h51m01.96s +21°06'56.10"
Mark McCarthy
Fremont (California/USA)
317mm (340x) Near equal white, fairly wide separation
STF163 AB 6.8 9.1 34.5'' 38° 2018 Cas 01h51m16.93s +64°51'17.90"
Rene Merting
Drachhausen (Germany)
16x70 ein ordentlich getrenntes Pärchen - Komponente A im Südwesten strahlt gelblich, B im Nordosten 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 8.2 8.2 3.0'' 206° 2016 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.
STF179 7.6 8.1 3.5'' 161° 2016 And 01h53m10.72s +37°19'16.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal magnitude, 4", nice orange-yellow color.
gamma Ari, STF180 AB 4.5 4.6 7.4'' 2018 Ari 01h53m31.76s +19°17'38.60"
Robert Zebahl
Leipzig (Germany)
200mm (80x) Nice, obvious double star. Both components have similar brightness and appeared 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".
STF170 7.5 8.2 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.
STF182 AB 8.3 8.3 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.
H5 12, 9 Ari, lambda Ari AB 4.8 6.7 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.
S404 AB 7.6 9.7 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 Südosten nach Nordwesten zieht - mit etwas Geduld ist Komponente B knapp östlich von A zu erkennen - A ist nicht die hellste Leuchte, B noch deutlich schwächer
FRK3 6.7 9.7 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
STF194 7.6 9.5 1.3'' 279° 2015 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.
BU513, 48 Cas AB 4.7 6.7 0.6'' 320° 2013 Cas 02h01m57.55s +70°54'25.40"
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
STF208, 10 Ari AB 5.8 7.9 1.4'' 344° 2017 Ari 02h03m39.26s +25°56'07.60"
Uwe Pilz
Leipzig (Germany)
105mm (200x) helle Stelle im ersten Ring ../projects/doublestars/uwe_pilz/sketches/10Ari.jpg
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 2.3 5.0 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
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 8.3 8.7 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
STF221 AB 8.1 9.4 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 8.0 8.9 11.7'' 186° 2015 Tri 02h10m16.10s +33°21'55.20"
Robert Zebahl
Leipzig (Germany)
55mm (25x) Well separated with noticeable difference in brightness.
STI1797 7.5 11.8 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 8.3 8.9 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 6.0 6.7 16.6'' 37° 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 Nordosten 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
Robert Zebahl
Leipzig (Germany)
120mm (18x) Well split with noticeable difference in brightness.
Robert Zebahl
Leipzig (Germany)
200mm (100x) SQM-L 20.4: Nice and evident double star, easy to split. About 12 arcminutes NE there is NGC828 (v12.3m),
STF226 AB 8.0 9.6 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
iota Tri, 6 Tri, STF227 5.3 6.7 3.7'' 69° 2016 Tri 02h12m22.28s +30°18'11.10"
Frederik Wanink
Itterbeck (Germany)
254mm (200x) Helligkeitsunterschied deutlich
STF230 7.9 9.4 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
STF237 AB 9.5 9.9 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 8.3 8.6 4.8'' 52° 2015 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 8.7 9.4 0.6'' 222° 2012 Cas 02h17m23.00s +61°21'06.50"
Mark McCarthy
Fremont (California/USA)
317mm (885x) Light orange star, definitely elongated, maybe notched, but no convincing split. Tough little Struve.
STF239 7.1 7.8 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.
STF244 9.3 9.4 4.4'' 290° 2015 Ari 02h17m34.01s +22°13'50.30"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Pretty faint, equal magnitude ~3-4", well split.
BU1170, 7 Per BC 11.5 11.7 0.3'' 313° 1958 Per 02h18m04.12s +57°32'07.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) The B star feels elongated with averted vision, this is a marginal detection of the BC component.
BU1170, 7 Per A-BC 6.1 12.3 68.7'' 358° 2013 Per 02h18m04.58s +57°30'58.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near the Double Cluster. Pretty orange-yellow star. B star is distant and faint. The B star feels elongated with averted vision (see BC).
STF245 AB 7.3 8.0 11.0'' 294° 2015 And 02h18m36.27s +40°16'43.70"
Robert Zebahl
Leipzig (Germany)
120mm (50x) Both components well seen with noticeable difference in brightness.
STF249 7.2 9.0 2.3'' 196° 2015 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 10.8 11.4 69.1'' 20° 2014 Per 02h22m51.72s +58°35'11.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide near equal pair
HLD7 8.0 9.9 1.7'' 182° 2015 Per 02h25m25.96s +58°12'09.30"
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"
★★ STF262, iota Cas AB 4.6 6.9 2.7'' 227° 2016 Cas 02h29m03.96s +67°24'08.70"
AC 4.6 9.1 6.7'' 117° 2015
AD 4.6 8.5 210.9'' 60° 2016
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/doublestars/robert_zebahl/sketches/2019-08-25_iota_cas.jpg
Uwe Pilz
Leipzig (Germany)
105mm (200x) Dreifachstern lohnend ../projects/doublestars/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 gray-blueish and obviously fainter than B. Grand sight at 129x!
HJL1019 AB 6.1 9.6 217.1'' 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 6.7 8.5 2.9'' 131° 2015 Per 02h29m24.96s +55°32'10.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange A, faint, wide separated B.
STF263, V528 Cas AB 8.6 10.9 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 5.9 9.9 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 7.0 9.7 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
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.
HJ2143 AB 8.1 9.6 23.6'' 20° 2015 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)
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
STFA5, 30 Ari AB 6.5 7.0 37.9'' 275° 2018 Ari 02h37m00.52s +24°38'50.00"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Near equal light orange, very wide. B has a C pair 0.6" and 4 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal magnitude, wide separated, PA to WSW
STF285 7.5 8.1 1.5'' 168° 2017 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 10.1 10.1 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 8.4 9.0 1.8'' 210° 2016 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 7.9 9.9 6.9'' 191° 2016 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
★★ STT44 AB 8.5 9.0 1.4'' 55° 2016 Per 02h42m13.13s +42°41'57.20"
Uwe Pilz
Leipzig (Germany)
105mm (200x) schwierig
Mark McCarthy
Fremont (California/USA)
317mm (553x) 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 6.3 11.6 5.3'' 162° 1928 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.
BU306 AB 6.4 10.4 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 7.9 8.1 3.2'' 316° 2016 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 7.1 11.6 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.
STT46 AB 6.8 10.8 4.9'' 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 3.8 8.5 30.4'' 301° 2017 Per 02h50m41.81s +55°53'43.80"
STF307 AC 3.8 11.6 64.0'' 269° 2014
WAL19 AF 3.8 11.4 57.7'' 25° 2013
WRD1 CD 11.6 12.7 5.2'' 116° 2015
SHJ34 AE 3.8 9.2 242.9'' 297° 2012
FYM161 CG 11.6 14.0 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
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 9.5 9.7 14.2'' 136° 2015 Per 02h52m05.13s +37°17'45.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide near equal
STF314 AB-C 7.0 7.3 1.6'' 316° 2018 Per 02h52m52.03s +52°59'50.60"
Frederik Wanink
Itterbeck (Germany)
254mm (460x) ähnlich hell ../projects/doublestars/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 7.3 8.8 0.2'' 120° 2005 Per 02h52m52.03s +52°59'50.60"
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 6.4 10.6 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 5.4 9.7 14.0'' 237° 2014 Per 02h53m42.58s +38°20'15.60"
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 6.8 10.4 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 7.5 7.5 0.5'' 276° 2018 Ari 02h58m53.11s +21°37'03.90"
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 5.2 5.6 1.4'' 211° 2018 Ari 02h59m12.73s +21°20'25.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Equal bright white just split with seeing.
STF331 5.2 6.2 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.
Uwe Pilz
Leipzig (Germany)
105mm (150x) einfach
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow A. B ~1 D-mag.
STF336 7.0 8.3 8.7'' 2018 Per 03h01m29.07s +32°24'45.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide separation B orange A
STF346, 52 Ari AB-C 5.5 10.8 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 7.7 10.6 8.4'' 2014 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.
★★ STT51 8.5 8.7 0.5'' 346° 2018 Per 03h12m57.08s +44°17'14.70"
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 6.7 8.2 1.7'' 103° 2015 Per 03h15m48.70s +50°57'21.20"
Uwe Pilz
Leipzig (Germany)
105mm (196x) klebt am ersten Ring ../projects/doublestars/uwe_pilz/sketches/Hu544.jpg
Uwe Pilz
Leipzig (Germany)
105mm (260x) im ersten Ring
STF375 AB 7.6 9.9 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 5.3 8.1 0.9'' 218° 2015 Ari 03h21m13.63s +21°08'49.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Tau Ari. Bright, barely oval. Marginal.
STF381 7.6 8.8 1.1'' 108° 2015 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 6.6 10.0 96.4'' 129° 2013 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 8.0 9.0 2.8'' 215° 2016 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.
BU1179, 34 Per 4.7 7.3 0.6'' 146° 2007 Per 03h29m22.05s +49°30'32.20"
Mark McCarthy
Fremont (California/USA)
317mm (885x) Uncertain but can't resolve even at 885x
STF389 AB 6.4 7.9 2.6'' 71° 2015 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
STFA7 AB 7.4 7.8 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/doublestars/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 6.6 6.9 11.5'' 270° 2018 Tau 03h31m20.76s +27°34'18.50"
Uwe Pilz
Leipzig (Germany)
105mm (288x) ein Hauch schwärze dazwischen ../projects/doublestars/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.
STF412, 7 Tau AB 6.6 6.9 0.8'' 349° 2018 Tau 03h34m26.62s +24°27'52.10"
Uwe Pilz
Leipzig (Germany)
105mm (260x) A-B länglich
BU533 AB 7.5 7.7 1.0'' 222° 2018 Per 03h35m37.81s +31°40'48.70"
Mark McCarthy
Fremont (California/USA)
317mm (270x) Overlapping yellow-orange disks, equal mag
STF427, V1268 Tau 7.4 7.8 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.
STF431, 40 Per 5.0 10.0 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
STF435 7.2 8.9 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 8.0 9.6 196.7'' 175° 2015 Tau 03h43m41.53s +23°38'56.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very wide faint companion, ~3 delta mag.
STF437 9.8 10.0 11.2'' 310° 2015 Per 03h44m09.15s +32°07'09.30"
Uwe Pilz
Leipzig (Germany)
105mm (88x) einfach
★★ BU535, 38 Per 3.9 6.7 1.1'' 20° 2015 Per 03h44m19.13s +32°17'17.70"
Uwe Pilz
Leipzig (Germany)
105mm (88x) =omikron Per, in IC348, lohnend! ../projects/doublestars/uwe_pilz/sketches/ic348.jpg
Mark McCarthy
Fremont (California/USA)
317mm (270x) No split at 270x
★★ BU536/S437, SAO76169 S437 AB-C 8.1 7.7 38.8'' 308° 2017 Tau 03h46m16.00s +24°11'23.50"
BU536 AB 8.1 9.4 1.0'' 178° 2015
BU536 CD 7.7 12.9 18.3'' 2015
Uwe Pilz
Leipzig (Germany)
105mm (288x) in den Plejaden
STF450 AB 7.3 9.4 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 6.7 9.4 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 6.2 11.2 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 9.7 10.6 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 6.8 10.2 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 8.0 11.1 60.9'' 330° 2001 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 8.1 8.5 1.0'' 146° 2018 Per 03h52m04.69s +40°47'50.70"
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
STF464, zet Per AB 2.9 9.2 12.9'' 209° 2012 Per 03h54m07.92s +31°53'01.20"
Mark McCarthy
Fremont (California/USA)
317mm (270x) 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 4.8 5.9 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/doublestars/robert_zebahl/sketches/2019-02-09_32_eri.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) Farbkontrast, gelborange-blauweiß ../projects/doublestars/uwe_pilz/sketches/32Eri.jpg
STF471, epsilon Per, 45 Per AB 2.9 8.9 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 7.8 9.2 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 6.9 7.8 7.5'' 127° 2018 Tau 04h00m56.81s +23°12'05.40"
Robert Zebahl
Leipzig (Germany)
200mm (37x) Nice, evident double star, easy to split. Slight difference in brightness.
Mark McCarthy
Fremont (California/USA)
317mm (207x) Wide separation but closer than the AC, about half a delta mag.
STF479 AC 6.9 9.4 57.7'' 243° 2018 Tau 04h00m56.81s +23°12'05.40"
Mark McCarthy
Fremont (California/USA)
317mm (207x) 2x fainter than A star, and much wider than AB separation.
STF483 7.4 9.3 1.6'' 53° 2015 Per 04h04m07.10s +39°30'35.00"
Mark McCarthy
Fremont (California/USA)
317mm (270x) Yellow-orange star, very close, 1", 2 delta mag.
STT558, 37 Tau AB 4.5 10.0 135.0'' 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 7.3 9.7 2.9'' 353° 2015 Per 04h07m34.35s +38°04'28.30"
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 6.9 6.9 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.
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.
STF3114 AB 7.7 9.6 2.9'' 158° 2015 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 8.8 10.7 3.9'' 79° 2015 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 4.4 9.3 83.7'' 102° 2016 Eri 04h15m16.32s -07°39'10.30"
BC 9.5 11.2 8.3'' 331° 2017
Berthold Fuchs
Wiesbaden (Germany)
130mm A-BC: Triplesystem with a white Dwarf ../projects/doublestars/berthold_fuchs/photographs/Keid.png
HO328 7.4 9.1 0.5'' 2008 Tau 04h17m01.22s +19°40'32.60"
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 5.0 9.6 179.3'' 118° 2013 Tau 04h17m15.69s +20°34'43.50"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Omega Tau: very wide finder split, 2 delta mag.
STF520 8.3 8.4 0.6'' 84° 2018 Tau 04h18m14.55s +22°48'24.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint elongated to overlapping disks.
BU310 7.1 12.6 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 6.2 8.6 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 7.3 8.6 1.2'' 328° 2015 Tau 04h22m44.10s +15°03'22.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very close, 0.8" 1.5 delta mag, PA to N/NW.
STF533 AB 7.3 8.5 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 5.8 9.2 4.2'' 13° 2017 Per 04h24m37.46s +33°57'34.90"
Mark McCarthy
Fremont (California/USA)
317mm (270x) 56 Per. Pretty yellow and slight red pair, 2 delta mag.
STF545 AB 6.9 8.8 18.5'' 58° 2016 Tau 04h27m04.85s +18°12'27.10"
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 7.0 9.1 109.5'' 2015 Tau 04h29m30.35s +17°51'47.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White, wide, 1 delta mag.
STF554, 80 Tau 5.7 8.1 1.5'' 16° 2015 Tau 04h30m08.60s +15°38'16.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 1" 2 delta mag, PA N. Nice!
LDS2246 AB 4.8 6.5 254.0'' 130° 2011 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.
STFB2, alp Tau AC 0.8 11.3 136.5'' 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
LDS2266 AB 7.2 10.2 141.7'' 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.
62 Eri, SHJ48 AB 5.5 8.9 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"
STF616, omega Aur, 4 Aur AB 5.0 8.2 4.8'' 2014 Aur 04h59m15.41s +37°53'24.90"
Robert Zebahl
Leipzig (Germany)
70mm (44x) At 44x fainter component seen as fine star close to the primary component. At 57x wonderful view! Overall easy to split.
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.
STT92, 5 Aur AB 6.0 9.5 4.1'' 285° 2017 Aur 05h00m18.35s +39°23'40.90"
Uwe Pilz
Leipzig (Germany)
105mm (160x) schwierig ../projects/doublestars/uwe_pilz/sketches/5Aur.jpg
STF636 7.1 8.5 3.7'' 104° 2017 Eri 05h03m01.95s -08°39'47.40"
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.
J307 A-BC 6.8 9.3 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 5.1 10.8 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 5.8 9.0 21.3'' 69° 2017 Eri 05h08m20.18s -08°39'55.10"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Yellow A, red B, ~3 delta mag, well split.
STF645 A-BC 6.0 9.1 11.3'' 29° 2017 Tau 05h09m45.06s +28°01'50.20"
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 7.0 9.3 314.6'' 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.
STF648 AB 8.1 8.9 4.7'' 62° 2017 Aur 05h10m59.19s +32°02'19.50"
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.
Mark McCarthy
Fremont (California/USA)
317mm (270x) Light orange, half delta mag, wide.
STF652 6.3 7.4 1.7'' 180° 2017 Ori 05h11m45.35s +01°02'12.50"
Uwe Pilz
Leipzig (Germany)
105mm (260x) Länglich, 0“7
STF661, kappa Lep 4.4 6.8 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.
STF668, 19 Ori, beta Ori, Rigel A-BC 0.3 6.8 9.4'' 204° 2017 Ori 05h14m32.27s -08°12'05.90"
Robert Zebahl
Leipzig (Germany)
55mm (83x) The second component was immediately seen as faint companion. ../projects/doublestars/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.
Uwe Pilz
Leipzig (Germany)
105mm (288x) zwei Ringe und zahlreiche radiale Strahlen um den Hauptstern
STF667 7.2 8.8 4.2'' 316° 2018 Ori 05h14m41.31s -07°04'18.10"
Mark McCarthy
Fremont (California/USA)
371mm (553x) Pretty orange A and 2x fainter B, which is a little blue-orange. 5”
STF664 7.8 8.4 4.7'' 177° 2018 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.
BVD51 7.8 9.6 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 5.0 10.9 9.8'' 11° 2014 Aur 05h15m24.39s +32°41'15.30"
AC 5.0 7.3 14.2'' 225° 2017
AD 5.0 10.8 179.7'' 322° 2010
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.]
STF666 7.8 7.9 3.1'' 76° 2018 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!
STF669 8.4 9.0 9.9'' 278° 2014 Aur 05h18m56.78s +45°14'51.40"
Robert Zebahl
Leipzig (Germany)
55mm (25x) Well separated with visible difference in brightness.
STF688 7.5 7.5 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.
BU189 AB 6.4 9.8 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”.
STT105 8.6 8.6 0.2'' 302° 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 7.7 9.3 1.5'' 141° 2015 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
STF700, V1804 Ori 7.7 7.9 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.
STT104 7.0 11.1 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 6.1 8.1 6.2'' 139° 2018 Ori 05h23m18.50s -08°24'55.90"
Mark McCarthy
Fremont (California/USA)
371mm (553x) White and rusty red color, ~6”, 1 delta mag.
WNC2 A-BC 6.9 7.0 3.2'' 159° 2018 Ori 05h23m51.32s -00°51'59.80"
Robert Zebahl
Leipzig (Germany)
70mm (44x) Double star appeared elongated.
Robert Zebahl
Leipzig (Germany)
120mm (150x) Clearly split with nearly equally bright components.
ES576 AC 8.1 8.9 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 3.6 4.9 1.8'' 77° 2017 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.
STF698 AB 6.7 8.3 31.3'' 348° 2018 Aur 05h25m12.94s +34°51'18.60"
Mark McCarthy
Fremont (California/USA)
317mm (270x) Orange-yellow A and lilac B, wide, finder split, 1 delta mag. Pretty.
STF699 AB 7.9 8.6 8.9'' 346° 2018 Aur 05h25m38.50s +38°02'41.10"
Robert Zebahl
Leipzig (Germany)
55mm (25x) Well separated with slightly fainter companion.
Mark McCarthy
Fremont (California/USA)
317mm (270x) Wide yellow and blue-white, half delta mag.
STF716, 118 Tau AB 5.8 6.7 4.7'' 210° 2018 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.
HU217, LY Aur 7.2 8.3 0.6'' 254° 2008 Aur 05h29m42.65s +35°22'30.10"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) nicht als DS gesehen
STF725, 31 Ori 4.7 9.7 13.0'' 88° 2013 Ori 05h29m43.98s -01°05'31.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright orange and very faint blue B, 3 delta mag, pretty wide.
STF719 AB 7.5 8.8 1.4'' 336° 2016 Aur 05h30m06.14s +29°32'55.30"
Mark McCarthy
Fremont (California/USA)
317mm (277x) widely separated with an orange A and bluish B
STF728, 32 Ori 4.4 5.8 1.3'' 44° 2017 Ori 05h30m47.06s +05°56'53.30"
Uwe Pilz
Leipzig (Germany)
105mm (288x) sauber getrennt, Beugungsscheiben berühren sich gerade
STF729, 33 Ori AB 5.7 6.7 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 2.4 14.2 33.4'' 229° 2016 Ori 05h32m00.40s -00°17'56.70"
STFA14 AC 2.4 6.8 56.2'' 2017
Uwe Pilz
Leipzig (Germany)
105mm (200x) AC: sehr weit in reichem Sternfeld ../projects/doublestars/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.
STF718 AB 7.5 7.5 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.
STF734 AB 6.7 8.2 1.6'' 355° 2017 Ori 05h33m07.35s -01°43'02.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very close pair, delta mag 1, PA to north.
DA4, 42 Ori AB 4.6 7.5 1.2'' 203° 2016 Ori 05h35m23.16s -04°50'18.10"
Uwe Pilz
Leipzig (Germany)
105mm (260x) Unregelmäßigkeit im ersten Ring, nicht eindeutig
STF750 6.4 8.4 4.2'' 60° 2018 Ori 05h35m31.07s -04°21'50.60"
Uwe Pilz
Leipzig (Germany)
105mm (192x) mit 60mm trennbar
STF742 7.1 7.5 4.1'' 274° 2017 Tau 05h36m26.38s +21°59'35.10"
Located about 0.5 degree east of Messier 1.
Robert Zebahl
Leipzig (Germany)
120mm (48x) Nice, evident double near Messier 1. Easy to split with almost equally bright components.
Robert Zebahl
Leipzig (Germany)
200mm (80x) Nice double star with nearly equally bright components.
STF736 7.5 8.6 2.7'' 2015 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 6.5 6.5 1.1'' 319° 2017 Tau 05h37m08.84s +26°55'28.30"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Hair-split, equal brightness white stars. Nice.
★★ STF757 AB 8.0 8.3 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
26 Aur, STF753 AB-C 5.5 8.4 12.0'' 269° 2013 Aur 05h38m38.10s +30°29'32.80"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Bright yellow A and a fainter yellow white B.
STF774, zeta Ori, 50 Ori, Alnitak AB 1.9 3.7 2.4'' 166° 2017 Ori 05h40m45.52s -01°56'33.30"
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/doublestars/uwe_pilz/sketches/Alnitak.jpg
Mark McCarthy
Fremont (California/USA)
317mm (207x) about 2" and 1.5 delta mag.
STF774, zet Ori AC 1.9 9.6 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 6.4 7.1 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.
Mark McCarthy
Fremont (California/USA)
317mm (277x) two bright whites widely separated
STF778 8.4 10.1 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
STF789 AB 6.1 10.2 14.0'' 150° 2017 Ori 05h45m01.80s +04°00'29.30"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Widely separated 4 delta mag pair, in same FOV as STF 778
STF795, 52 Ori 6.0 6.0 1.0'' 222° 2015 Ori 05h48m00.21s +06°27'14.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright white, near equal magnitude, near touching disks hairline split
★★ STT117 7.1 10.0 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 7.4 9.8 7.4'' 18° 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 6.5 7.5 0.9'' 337° 2017 Cam 05h49m04.64s +62°48'29.60"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) gerade eben trennbar mit schwarzem Zwischenraum ../projects/doublestars/frederik_wanink/sketches/STF3115.jpg
STF796 AB 7.2 8.2 3.7'' 62° 2015 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
H5 90, nu Aur 4.0 11.4 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.
STF799 7.3 8.3 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 6.9 8.8 1.7'' 2016 Aur 05h53m28.64s +37°20'20.70"
Mark McCarthy
Fremont (California/USA)
317mm (270x) Nice!! Blazing white and close but nicely split light blue B, 2 delta mag.
STF816 6.9 9.3 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.
MIL2 7.1 14.5 11.8'' 231° 2015 Aur 05h55m22.26s +29°57'50.20"
Mark McCarthy
Fremont (California/USA)
317mm (277x) A white A and slightly ruddy B, easy.
STT124 6.1 7.4 0.7'' 295° 2016 Ori 05h58m53.23s +12°48'29.80"
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.
STT545, 37 Aur, theta Aur AB 2.6 7.2 4.2'' 305° 2017 Aur 05h59m43.24s +37°12'45.90"
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.
SIN128 AC 7.3 7.6 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 5.0 8.0 1.9'' 355° 1996 Mon 06h01m50.42s -10°35'52.60"
Uwe Pilz
Leipzig (Germany)
105mm (260x) schwache Aufhellung im ersten Ring ../projects/doublestars/uwe_pilz/sketches/3Mon.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) Begleiter schwach ../projects/doublestars/uwe_pilz/sketches/bu16.jpg
STF840 A-BC 7.2 8.9 21.4'' 248° 2014 Ori 06h06m28.04s +10°45'01.00"
Mark McCarthy
Fremont (California/USA)
317mm (170x) Wide blue-white and slightly red pair, 1 delta mag.
STF840 BC 9.8 10.1 0.4'' 126° 1997 Ori 06h06m28.04s +10°45'01.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) B maybe elongated? Not certain.
STT131 7.0 9.4 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
STT132 7.2 9.6 1.8'' 332° 2012 Aur 06h08m11.68s +37°58'57.90"
Mark McCarthy
Fremont (California/USA)
317mm (270x) White A and slightly red B. Fine pair. 2 delta mag.
BU17 AB 6.9 9.3 3.6'' 189° 2013 Mon 06h08m25.39s -11°08'46.60"
AC 6.9 10.8 10.2'' 260° 2015
BC 9.3 10.8 9.3'' 276° 1998
Uwe Pilz
Leipzig (Germany)
105mm (288x) Dreifachstern! (Burnham 17) ../projects/doublestars/uwe_pilz/sketches/bu17.jpg
STF848 AB 7.3 8.2 2.5'' 111° 2017 Ori 06h08m30.36s +13°58'15.80"
Robert Zebahl
Leipzig (Germany)
70mm (100x) Well split with obvious difference in brightness.
Mark McCarthy
Fremont (California/USA)
317mm (170x) Close bluish pair near the center of the open cluster NGC 2169
STF845, 41 Aur 6.2 6.9 7.5'' 358° 2017 Aur 06h11m36.59s +48°42'39.60"
Robert Zebahl
Leipzig (Germany)
55mm (25x) Relatively tight with visible difference in brightness.
STF877 7.5 8.0 5.7'' 264° 2015 Ori 06h14m42.67s +14°35'10.80"
Robert Zebahl
Leipzig (Germany)
70mm (44x) Well split, but close together. Little difference in brightness noticeable.
BU1008, eta Gem 3.5 6.2 1.8'' 258° 2017 Gem 06h14m52.69s +22°30'24.60"
Uwe Pilz
Leipzig (Germany)
105mm (260x) Aufhellung im ersten Ring
Uwe Pilz
Leipzig (Germany)
105mm (288x) sehr schwierig ../projects/doublestars/uwe_pilz/sketches/etaGem.jpg
STF872 AB 6.9 7.4 11.3'' 215° 2017 Aur 06h15m39.06s +36°08'55.30"
Robert Zebahl
Leipzig (Germany)
55mm (25x) Well separated with significant difference in brightness.
H5 55 7.0 10.8 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.
STF3116, FR CMa AB 5.5 9.7 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
STF881, 4 Lyn AB 6.1 7.7 0.6'' 149° 2016 Lyn 06h22m03.57s +59°22'19.50"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) schwierig wegen Helligkeitsunterschied
STF899 7.4 8.0 2.2'' 18° 2018 Gem 06h22m49.64s +17°34'27.30"
Robert Zebahl
Leipzig (Germany)
70mm (133x) Separated, but tight with visible difference in brightness.
STF900, epsilon Mon, 8 Mon AB 4.4 6.6 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/doublestars/uwe_pilz/sketches/epsMon.jpg
SHJ70 AB 6.7 8.2 25.0'' 202° 2017 Gem 06h27m46.58s +20°47'22.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very pretty orange A, with a brown B, ~1.5 delta mag.
★★★ beta Mon, 11 Mon STF919 AB 4.6 5.0 7.1'' 133° 2017 Mon 06h28m49.07s -07°01'59.00"
STF919 AC 4.6 5.4 9.8'' 125° 2018
STF919 BC 5.0 5.3 2.6'' 108° 2018
BU570 AD 4.6 12.1 26.6'' 55° 2012
Uwe Pilz
Leipzig (Germany)
105mm (137x) Dreifachsystem, drei fast gleichhelle Sterne. Alle blau-weiß
STT143 AB 6.2 10.1 7.6'' 103° 2009 Gem 06h31m09.99s +16°56'19.00"
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 6.2 11.4 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 7.2 9.6 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 7.2 8.6 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
STF918 AB 7.3 8.2 4.9'' 336° 2017 Aur 06h33m57.62s +52°27'41.80"
Robert Zebahl
Leipzig (Germany)
55mm (40x) At 40x tight, at 55x well split with obviously fainter companion.
STF932 8.3 8.5 1.6'' 305° 2017 Gem 06h34m21.57s +14°45'08.30"
Robert Zebahl
Leipzig (Germany)
70mm (150x) Unfortunately a nearby lamp bothered me. I could see the double star at least elongated.
STF938, 14 Mon 6.5 10.6 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
STF942 10.1 10.1 3.5'' 246° 2015 Gem 06h37m40.87s +23°38'54.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint near equal brightness, well split
STT152, 54 Aur 6.2 7.8 0.8'' 34° 2016 Aur 06h39m33.12s +28°15'47.40"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) schwierig, Luftunruhe ../projects/doublestars/frederik_wanink/sketches/STT152.jpg
STF950, S Mon AB 4.7 7.8 3.0'' 214° 2015 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.
AGC1, 9 CMa, alpha CMa, Sirius AB -1.5 8.4 10.7'' 75° 2016 CMa 06h45m08.92s -16°42'58.00"
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.
STT155 7.1 10.9 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"
★★★ STF948, 12 Lyn AB 5.4 6.0 1.9'' 66° 2018 Lyn 06h46m14.15s +59°26'30.10"
AC 5.4 7.0 8.8'' 310° 2018
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/doublestars/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/doublestars/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/doublestars/robert_zebahl/sketches/2019-01-20_stf948.jpg
HWE15 8.9 10.3 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
STT157 7.2 9.2 0.6'' 163° 2016 Mon 06h47m47.56s +00°20'24.50"
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
STF958 AB 6.3 6.3 4.5'' 77° 2018 Lyn 06h48m12.29s +55°42'15.10"
Robert Zebahl
Leipzig (Germany)
70mm (33x) Clearly split, equally bright, close together. Nice view.
STF982, 38 Gem AB 4.8 7.8 7.4'' 143° 2018 Gem 06h54m38.63s +13°10'40.10"
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)
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.
STF981 8.7 9.0 0.9'' 119° 2016 Gem 06h55m28.54s +30°09'42.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very close orange pair, equal magnitude. Clean split, ~1".
STF991 AB 8.0 9.2 3.8'' 164° 2015 Gem 06h57m01.26s +24°57'27.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White and orange, 2 delta mag, ~5", PA to S.
STT159, 15 Lyn AB 4.5 5.5 0.7'' 236° 2017 Lyn 06h57m16.60s +58°25'23.00"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) relativ einfach ../projects/doublestars/frederik_wanink/sketches/15Lyn.jpg
CPO7, eps CMa 1.5 7.5 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
STF994 AB 7.9 8.1 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.
★★ BU100 7.3 11.1 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 7.2 8.2 0.2'' 99° 1997 Mon 07h01m09.85s +11°46'28.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Not perfectly round AB, a faint bluish haze in the diffraction to the south. Marginal.
BU573 7.2 7.8 0.9'' 308° 2016 Mon 07h01m49.89s -10°52'56.30"
Uwe Pilz
Leipzig (Germany)
105mm (247x) schwach gekerbt ../projects/doublestars/uwe_pilz/sketches/bu573.jpg
HO342 8.0 8.7 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”
STF1009 AB 6.9 7.0 4.4'' 149° 2018 Lyn 07h05m39.83s +52°45'31.30"
Robert Zebahl
Leipzig (Germany)
70mm (33x) Very nice view. Equally bright components, tight.
★★ STF1014 9.9 9.9 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 7.9 7.7 171.9'' 99° 2015 Gem 07h08m00.24s +15°31'42.90"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Pretty, wide equal finder split, white, nice field.
HJ3934 A-BC 6.9 8.5 13.6'' 238° 2017 CMa 07h11m20.93s -21°48'11.80"
Uwe Pilz
Leipzig (Germany)
105mm (180x) schwach
WEI14 7.8 8.9 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 7.2 7.3 0.8'' 304° 2018 Gem 07h12m49.08s +27°13'30.20"
Uwe Pilz
Leipzig (Germany)
105mm (260x) eingekerbt ../projects/doublestars/uwe_pilz/sketches/stf1037.jpg
Frederik Wanink
Itterbeck (Germany)
254mm (640x) leichter, gleich hell ../projects/doublestars/frederik_wanink/sketches/STF1037.jpg
STF1056 8.0 8.9 3.9'' 299° 2017 Mon 07h15m34.34s -01°51'36.80"
Mark McCarthy
Fremont (California/USA)
317mm (170x) Wide reddish pair.
★★ HJ3945 AB 5.0 5.8 26.8'' 50° 2015 CMa 07h16m36.84s -23°18'56.10"
Uwe Pilz
Leipzig (Germany)
105mm (37x) soforrt auffallend, blau-orange ../projects/doublestars/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.
STF1068 AB 9.3 9.8 4.2'' 349° 2017 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 8.1 8.8 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.
STF1066, delta Gem, 55 Gem 3.5 8.2 5.5'' 230° 2016 Gem 07h20m07.39s +21°58'56.40"
Robert Zebahl
Leipzig (Germany)
55mm (71x) Large difference in brightness. The fainter component was well separated, but just a very tiny 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".
STF1070 AB 8.7 9.3 1.7'' 324° 2015 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 7.5 7.7 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 5.8 6.7 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.
STF1083 7.3 8.1 6.7'' 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 7.0 11.7 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 AC 7.3 9.5 49.9'' 79° 2015 Gem 07h26m27.33s +18°31'00.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty finder split, equal white. Is a 2+1 with 2x fainter BC.
STF1090 BC 8.2 9.5 20.9'' 328° 2015 Gem 07h26m31.56s +18°30'52.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Is a 2+1 with AC, C is 2 delta mag than fainter B.
STF1094 7.6 8.5 2.7'' 100° 2014 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 7.0 8.9 35.1'' 277° 2015 Gem 07h27m40.54s +22°08'29.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange with a 2x fainter white star, PA slightly SW. AB is 12th mag and not seen
STF1103 7.1 8.6 3.9'' 247° 2015 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 6.6 8.2 11.7'' 179° 2017 Gem 07h32m50.63s +22°53'15.40"
Uwe Pilz
Leipzig (Germany)
105mm (130x) einfach
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange stars, 2 delta mag, PA to south, ~8"
STF1116 7.8 8.5 1.8'' 97° 2015 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 1.9 3.0 5.1'' 54° 2017 Gem 07h34m35.86s +31°53'17.80"
AC 1.9 9.8 69.8'' 163° 2017
AD 1.9 10.1 179.8'' 221° 2017
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.
Uwe Pilz
Leipzig (Germany)
105mm (144x) AB: blauweiß-weiß ../projects/doublestars/uwe_pilz/sketches/Castor.jpg
STT174 6.6 8.3 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.
★★ STF1126 AB 6.5 7.0 0.9'' 176° 2017 CMi 07h40m06.99s +05°13'51.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wow, very close <1" hair-split, near equal brightness
STT179, kappa Gem, 77 Gem 3.7 10.0 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.
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.
A674 8.2 9.8 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 8.7 10.1 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.
STF1140 7.0 8.7 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.
STF1147 9.7 9.7 2.2'' 177° 2018 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".
STT182 7.8 7.9 0.9'' 2017 CMi 07h52m42.12s +03°23'02.20"
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.
STF1162 8.0 10.2 9.0'' 327° 2015 Cnc 07h57m22.66s +13°12'24.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and blue, pretty wide.
STF1167 9.8 11.8 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 8.7 9.1 2.4'' 108° 2017 Cnc 07h59m45.52s +13°41'19.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Close near equal pair, 2".
STF1171 6.5 9.9 2.0'' 326° 2015 Cnc 08h01m00.78s +23°34'59.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and orange, 4 delta mag! very faint and close B
STF1173 AB 8.5 9.9 10.4'' 51° 2015 Cnc 08h01m23.12s +16°56'58.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide, pretty faint
HO349 AB 7.7 12.0 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.
STT186 7.7 7.9 1.0'' 73° 2017 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 8.5 8.8 0.4'' 220° 2017 Cnc 08h04m23.10s +12°17'23.80"
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
STF1182 7.5 8.8 4.8'' 73° 2017 CMi 08h05m24.43s +05°49'38.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White and reddish, 1 delta mag, PA due east.
STF1181 8.3 9.3 5.2'' 142° 2017 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 6.7 7.4 3.5'' 349° 2017 Cnc 08h05m37.06s +27°31'46.90"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt ../projects/doublestars/frederik_wanink/sketches/STF1177.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellowish, 1 delta mag, ~4"
STF1186 7.1 10.1 3.4'' 219° 2007 Cnc 08h08m49.61s +27°28'49.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 11 Cnc: Orange with very faint B, ~3"
STF1188 8.7 9.3 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 7.2 8.0 3.1'' 19° 2017 Cnc 08h09m30.45s +32°13'18.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and orange, 1 delta mag, 5"
BUP111 AB 6.6 9.3 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 10.3 10.8 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 9.6 11.7 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 AB-C 4.9 5.8 5.8'' 66° 2017 Cnc 08h12m12.79s +17°38'51.20"
AB 5.3 6.2 1.0'' 2017
Robert Zebahl
Leipzig (Germany)
102mm (86x) AB-C: Easy to separate. A: light gray, 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/doublestars/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/doublestars/robert_zebahl/sketches/2019-02-24_stf1196.jpg
Frederik Wanink
Itterbeck (Germany)
254mm (200x) AB-C: AB (1,1") nicht bemerkt ../projects/doublestars/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.
★★ STF1196, zet Cnc AC 5.3 5.8 6.2'' 62° 2018 Cnc 08h12m12.79s +17°38'51.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Triple, all near equal magnitude, yellow-white. AC ~6", wide split.
HUT1, zet Cnc Ca-Cb 6.2 7.1 0.3'' 96° 2016 Cnc 08h12m13.27s +17°38'51.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) not quite round, oval/olive shaped. It is the AB-C of STF 1196.
STF1197 9.0 9.7 1.8'' 100° 2017 Cnc 08h12m44.45s +29°32'30.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint pair, 1 delta mag, ~2".
STF1201 8.1 9.5 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 7.4 9.6 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 6.4 10.9 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 7.7 9.8 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 7.2 9.4 15.5'' 113° 2015 Hya 08h15m48.54s +02°48'05.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty wide greenish yellow pair, wide separation, 2 delta mag.
STF1223, phi 2 Cnc 6.2 6.2 5.2'' 219° 2018 Cnc 08h26m47.08s +26°56'07.80"
Uwe Pilz
Leipzig (Germany)
105mm (88x) sehr schön, blauweiß-gelbweiß ../projects/doublestars/uwe_pilz/sketches/stf1223.jpg
STN61 8.4 9.4 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 6.4 10.4 20.8'' 55° 2017 Cnc 08h40m22.11s +19°40'11.90"
AC 6.5 7.6 64.0'' 343° 2017
AD 6.5 9.2 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)
CBL32 7.4 10.7 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 4.1 6.0 31.3'' 308° 2016 Cnc 08h46m41.82s +28°45'35.60"
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/doublestars/uwe_pilz/sketches/iotaCnc.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.
BU335 7.5 9.4 2.6'' 265° 2017 Hya 08h48m12.24s +02°34'48.40"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Close, ~3", 2 delta mag.
STF1275 AB 8.7 8.9 1.9'' 198° 2015 UMa 08h51m26.19s +57°31'38.10"
Robert Zebahl
Leipzig (Germany)
70mm (100x) At 100x and 150x not permanently split. Components very close together.
HJ460, 53 Cnc AB 6.5 11.7 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).
STF1291, 57 Cnc AB 6.1 6.4 1.5'' 310° 2017 Cnc 08h54m14.65s +30°34'45.80"
AB-C 5.5 9.2 54.6'' 204° 2015
Uwe Pilz
Leipzig (Germany)
105mm (144x) gelb ../projects/doublestars/uwe_pilz/sketches/57Cnc.jpg
ARG21, AC UMa 10.0 10.4 21.4'' 107° 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.
★★ BU408 7.3 9.6 2.8'' 346° 2017 UMa 08h59m00.62s +63°25'42.80"
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.
SHJ101, 67 Cnc 6.1 9.2 103.9'' 329° 2015 Cnc 09h01m48.84s +27°54'09.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 67 Cnc. White pair, 2 delta mag, wide.
STTA97 8.3 8.3 51.8'' 238° 2015 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 5.7 6.2 0.2'' 108° 1944 Cnc 09h09m21.53s +22°02'43.60"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) nicht als DS gesehen
STF1333 6.6 6.7 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/doublestars/uwe_pilz/sketches/stf1333.jpg
STF1334, 38 Lyn AB 3.9 6.1 2.5'' 229° 2017 Lyn 09h18m50.64s +36°48'09.30"
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/doublestars/robert_zebahl/sketches/2019-01-22_stf1334.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) gelb, trennbar bei 66x ../projects/doublestars/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"
STF1344 9.0 9.5 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.
BU105, kappa Leo, 1 Leo AB 4.6 9.7 2.0'' 209° 2015 Leo 09h24m39.28s +26°10'56.80"
AB 4.6 9.7 2.0'' 209° 2015
Uwe Pilz
Leipzig (Germany)
105mm (180x) Begleiter sitzt im ersten Ring
BU105, kap Leo AB 4.6 9.7 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.
★★ STT200 6.5 8.6 1.2'' 337° 2007 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!
STF1353 9.9 10.0 3.3'' 125° 2017 Leo 09h27m39.28s +15°44'32.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Well separated near equal 9th magnitude white stars, ~4"
STF1356, ome Leo 5.7 7.3 0.9'' 112° 2017 Leo 09h28m27.41s +09°03'24.40"
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 5.8 11.1 24.8'' 80° 2014 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 5.5 7.8 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.
STF1360 AB 8.9 8.9 13.8'' 242° 2017 Leo 09h30m35.95s +10°36'06.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Unremarkable wide separation 8th mag stars.
STF1351, 23 UMa AB 3.6 9.2 22.9'' 268° 2015 UMa 09h31m31.57s +63°03'42.50"
AC 3.7 11.8 105.2'' 232° 2003
Mark McCarthy
Fremont (California/USA)
317mm (270x) AB: 23 UMa. Lovely yellow-white and 3x fainter wide B, white.
SHJ107, 6 Leo 5.2 9.3 37.1'' 75° 2014 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 8.6 9.7 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 6.5 12.1 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.
HU1128, 11 LMi 4.8 12.5 6.7'' 61° 2012 LMi 09h35m39.50s +35°48'36.40"
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 6.3 9.4 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.
STT204 AB 6.7 10.7 8.2'' 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 7.3 8.7 2.8'' 311° 2017 LMi 09h41m21.88s +38°57'01.90"
Robert Zebahl
Leipzig (Germany)
120mm (168x) At 50x elongated, at 75x seen as '8'. At 168x clearly split with obviously fainter component.
STT206 8.3 11.4 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 8.0 12.6 11.9'' 202° 2015 Lyn 09h42m29.17s +40°58'25.20"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Yellow and orange pair ~1 delta mag.
STT208, phi UMa 5.3 5.4 0.5'' 304° 2017 UMa 09h52m06.36s +54°03'51.40"
Uwe Pilz
Leipzig (Germany)
105mm (260x) länglich, schwierig
STT209 7.4 10.3 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.
STF1399 7.7 8.4 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/doublestars/berthold_fuchs/photographs/STF 1399.png
STF1398 8.1 11.4 3.1'' 103° 2015 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 8.5 9.1 1.2'' 256° 2015 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.
STF1406 8.4 9.4 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 8.0 8.8 1.0'' 296° 2015 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 7.3 11.8 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.
alpha Leo, 32 Leo, Regulus STFB6 AB 1.4 8.2 175.5'' 308° 2016 Leo 10h08m22.31s +11°58'01.90"
HDO127 AD 1.4 12.1 195.3'' 274° 2015
HDO127 BC 8.2 13.2 2.1'' 95° 2015
Uwe Pilz
Leipzig (Germany)
105mm (288x) AB: sehr weit; einfach
STF1407 10.2 10.6 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"
STF1413 9.8 9.8 1.8'' 271° 2017 Leo 10h12m18.72s +16°20'54.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very close ~2", very faint equal pair.
STT213 AB 8.6 9.8 1.1'' 121° 2017 Leo 10h13m08.88s +27°25'10.50"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Bright yellow A, ~2 magnitudes fainter B, very wide separation.
STF1417 9.2 9.3 2.4'' 77° 2017 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.
STT215 7.2 7.5 1.5'' 176° 2018 Leo 10h16m16.05s +17°44'24.60"
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
SHY552 7.4 8.8 107.2'' 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.
BVD81 5.8 10.0 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 8.9 9.9 4.4'' 224° 2016 Leo 10h17m02.94s +10°06'51.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint pair, 1 delta mag, PA west ~4-5"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1419.png
STT523, 39 Leo 5.8 11.3 7.9'' 300° 2017 Leo 10h17m14.53s +23°06'22.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Unremarkable star with wide, very faint B
STF1421 8.2 9.1 4.6'' 330° 2017 Leo 10h18m05.54s +27°31'27.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Not difficult, 1 delta mag, 5" or so. Bluish.
Berthold Fuchs
Wiesbaden (Germany)
130mm difficult DS ../projects/doublestars/berthold_fuchs/photographs/STF 1421.png
STF1420 9.1 10.6 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".
STF1423 9.4 10.1 0.7'' 311° 2017 Leo 10h19m10.64s +20°33'48.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Tough! Elongated to hairline split.
★★ STF1424, gamma Leo, 41 Leo, Algieba AB 2.4 3.6 4.7'' 127° 2017 Leo 10h19m58.35s +19°50'29.40"
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/doublestars/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/doublestars/robert_zebahl/sketches/2019-03-09_gamma_leo.jpg
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.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Algieba: Bright yellow and yellow-orange pair, 1 delta mag, 4-6"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright yellow and yellow-white, 1 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very bright yellow, 1 delta mag wide.
STF1426 AB-C 7.3 9.4 7.6'' 2018 Leo 10h20m32.32s +06°25'47.60"
AB 8.0 8.3 0.9'' 313° 2017
Robert Zebahl
Leipzig (Germany)
102mm (160x) AB-C: Quite large angular distance and therefor easy to separate. The C component was pretty faint.
Robert Zebahl
Leipzig (Germany)
102mm (160x) AB: At first glance elongated, on closer look visible as '8'.
Stefan Loibl
Rosenheim (Germany)
102mm (164x) AB-C easily split, A-B not detectable as double
Uwe Pilz
Leipzig (Germany)
105mm (288x) A-B länglich, C weit
STF1425 9.9 10.7 4.8'' 358° 2017 UMa 10h21m34.14s +46°09'07.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint pair, ~4-5" orange and blue, 0.5 delta mag.
STF1427 8.2 8.5 9.3'' 215° 2018 UMa 10h22m00.53s +43°54'19.30"
Mark McCarthy
Fremont (California/USA)
317mm (277x) 8th magnitude orange star and a very wide 1 delta mag B.
★★ STT216 7.4 10.3 2.2'' 230° 2016 Leo 10h22m43.81s +15°20'39.70"
Mark McCarthy
Fremont (California/USA)
317mm (277x) A white and bright (7.3), B red & much fainter (10.3), a close split (2").
STF1429 9.1 9.3 0.8'' 155° 2017 Leo 10h25m01.79s +24°36'44.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very tough. Faint, need averted vision to brighten and sharpen. Elongated to clean split in the best moments with seeing, near equal magnitude
STF1431 7.8 9.1 3.6'' 74° 2017 Leo 10h25m35.12s +08°46'35.40"
Robert Zebahl
Leipzig (Germany)
70mm (67x) Separable at 67x, but very close together with a clear difference in brightness. Easy to separate at 100x. Next to it the star 44 Leo shines in a striking, bright orange.
Uwe Pilz
Leipzig (Germany)
105mm (88x) nahe 44 Leo
HJ832, 45 Leo 6.0 12.4 34.3'' 121° 2012 Leo 10h27m38.99s +09°45'44.70"
Uwe Pilz
Leipzig (Germany)
105mm (260x) nicht schwierig
ES1905 AB 8.6 12.6 41.6'' 68° 2015 UMa 10h30m16.09s +63°20'55.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White with 3x fainter, 11th mag, B. Very wide.
HJ482, 33 LMi 5.9 11.8 57.7'' 247° 2014 LMi 10h31m51.36s +32°22'46.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 33 LMi. Very bright A, with widely separated, very faint B.
STF1442 8.2 8.5 13.3'' 157° 2017 Leo 10h31m58.95s +22°02'22.00"
Berthold Fuchs
Wiesbaden (Germany)
130mm difficult DS ../projects/doublestars/berthold_fuchs/photographs/STF 1442.png
STF1443 9.9 10.0 5.3'' 161° 2018 LMi 10h33m17.07s +37°40'25.00"
Robert Zebahl
Leipzig (Germany)
120mm (50x) At 50x split with little distance. At 75x clearly split with small difference in brightness.
Mark McCarthy
Fremont (California/USA)
317mm (553x) White, near equal, 3-4"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1443.png
STF1446 9.3 10.0 5.6'' 250° 2017 Leo 10h33m33.32s +15°12'49.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Two faint stars, pretty well separated, 1 delta mag.
STF1447 7.5 8.9 4.5'' 124° 2017 Leo 10h33m47.28s +23°21'02.40"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Faint white and red-orange, PA to the east, pretty wide 6". Nice pair.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Both white, A (7.5) 2x brighter than B (8.9). Wide separation (4").
STF1448 AC 7.5 9.6 10.9'' 259° 2011 Leo 10h34m23.24s +21°35'36.40"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Pretty orange and blue pair, 2 delta mag, ~10"
Mark McCarthy
Fremont (California/USA)
317mm (277x) An orange and blue pair. Fainter than Alberio but just as pretty.
STF1450, 49 Leo 5.8 7.9 2.2'' 156° 2017 Leo 10h35m02.16s +08°39'01.60"
Robert Zebahl
Leipzig (Germany)
70mm (133x) B component appeared as clear brightening on the first diffraction ring of the primary component in the correct position angle.
Uwe Pilz
Leipzig (Germany)
105mm (200x) Begleiter klebt am ersten Ring
Mark McCarthy
Fremont (California/USA)
317mm (277x) White and slight yellow, ~6-7", nice pair.
STF1454 9.0 11.0 1.3'' 353° 2010 LMi 10h38m11.10s +26°36'24.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Quite tough: averted vision only, very tight, similar magnitude, when seeing stills.
STT222 7.0 11.7 4.0'' 339° 2015 UMa 10h38m19.89s +60°07'30.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Extremely faint star, B seen with averted vision, PA to north.
STF1459 8.3 8.8 5.4'' 152° 2017 LMi 10h40m12.46s +38°24'11.40"
Robert Zebahl
Leipzig (Germany)
120mm (50x) Clearly split with noticeable difference in brightness.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty yellow-orange, 0.5 delta mag, 5-6".
STT227 8.3 8.8 0.9'' 2017 Leo 10h41m41.58s +10°44'22.30"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Faint reddish pair, near equal, just split but hazy, poor view.
A2768 6.9 8.4 0.6'' 242° 2017 Sex 10h42m37.53s +03°34'58.90"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Feels like a not round disk, but uncertain.
BU913, 40 LMi AB 5.5 12.6 22.5'' 109° 2001 LMi 10h43m01.95s +26°19'32.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 40 LMi: Bright A, very faint B, very wide separation. B looks like a ghost.
STF1465 9.8 10.1 2.2'' 10° 2015 UMa 10h43m13.35s +44°37'41.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal well split ~3". 9th-10th mag.
STF1466, 35 Sex AB 6.2 7.1 6.7'' 239° 2017 Sex 10h43m20.91s +04°44'51.60"
Robert Zebahl
Leipzig (Germany)
102mm (28x) Very nice view. At 28x obviously unequal and easy to split. A appeared slightly orange. At 86x B appeared gray-blue. ../projects/doublestars/robert_zebahl/sketches/2019-04-06_35_sex.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) Orange and a little blue, wide separation, bright, half a delta mag.
SMA75 AB 5.2 7.3 288.0'' 88° 2018 UMa 10h43m32.89s +46°12'13.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide 80mm finder pair, white and slight yellow. In the scope there are some more faint stars about, so it is likely a small cluster -- 7 stars in the system.
STF1468 9.7 9.7 4.3'' 334° 2017 Leo 10h44m39.96s +20°42'18.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint near equal, close but a nice split
STF1467 8.6 10.8 4.0'' 291° 2015 UMa 10h45m15.60s +44°58'11.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange star with extremely faint wide split B. Needed averted vision to notice it as a smudge but could see it with direct vision as a small blue point when seeing stills. ~2 delta mag.
S612, 42 LMi AB 5.3 7.8 196.2'' 174° 2015 LMi 10h45m51.91s +30°40'56.60"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Very widely separated, split in finder (196"!). white A with a slightly red B
Mark McCarthy
Fremont (California/USA)
317mm (553x) 42 LMi: Very bright white and 3 delta mag orange B, very wide separation.
STF1469 AB 7.7 10.4 10.9'' 324° 2015 UMa 10h47m43.86s +65°27'36.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White and 2x fainter B, wide.
★★ STT229 7.6 7.9 0.7'' 256° 2017 UMa 10h48m02.55s +41°06'35.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Just wider than a thin hair split of equal white stars, ~8th mag. 0.63"! in 40 years it will be 0.2"
STF1476, 40 Sex 7.1 7.8 2.4'' 17° 2017 Sex 10h49m17.31s -04°01'23.80"
Mark McCarthy
Fremont (California/USA)
317mm (340x) Tight white of equal brightness
S617 6.2 8.7 35.2'' 179° 2017 Leo 10h53m24.96s -02°15'18.80"
Mark McCarthy
Fremont (California/USA)
317mm (340x) Yellow A, blue B, wide separation
STF1483 9.5 9.6 2.4'' 243° 2017 UMa 10h54m30.84s +47°29'35.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Two near equal wide split, fairly faint, 9.5 mag.
SKF59 7.4 11.5 34.1'' 59° 2015 LMi 10h54m44.78s +36°45'31.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange-yellow star with very wide separated very faint B, need averted vision.
STF1487, 54 Leo 4.5 6.3 6.6'' 113° 2017 Leo 10h55m36.80s +24°44'59.00"
Robert Zebahl
Leipzig (Germany)
55mm (27x) At 27x split, but very tight with noticeable difference in brightness. At 71x easy to separate. No visible color difference.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Bright white pair (4.5, 6.3) wide sep (6")
STF1492 8.0 10.2 21.6'' 165° 2017 LMi 10h57m35.85s +30°39'09.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 3 delta mag white with widely separated B
STF1491 AB 8.4 11.3 14.1'' 33° 2017 UMa 10h58m50.42s +61°42'56.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and blue, pretty wide, ~3 delta mag.
UC2059 AB 7.5 10.7 45.3'' 46° 2014 UMa 11h01m45.73s +36°40'41.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty well separated, 1.5 delta mag, not remarkable as I hoped given the odd designation.
COU1422 Ba-Bb 11.2 11.5 0.6'' 38° 2008 UMa 11h01m48.52s +36°41'14.60"
Mark McCarthy
Fremont (California/USA)
762mm (1219x) Cou 1422 is a pair of 11th magnitude stars very close to UC 2059 -- best I could get of Cou 1422 was an elongation with the seeing. Tried 1219x without improving the elongation.
STF1504 7.9 8.1 1.2'' 123° 2017 Leo 11h03m58.93s +03°38'19.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White near equal, ~2", nice.
HZG8, 51 UMa AC 6.0 7.6 150.1'' 83° 2017 UMa 11h04m31.28s +38°14'28.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very wide separation 1.5" mag. This is AC of 51 UMa, AB is Ho 377 which is 6.04,11.60 and 8.2"
★★ HO378 AB 8.2 9.1 1.1'' 237° 2017 UMa 11h04m57.29s +38°24'38.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) In a pretty cluster in the finder (~ 12 stars loose and poor, wide magnitude range, triangle shape). Pair is a fine split 1 delta mag 1", ice blue A and slightly yellow B.
★★ BU599, 65 Leo 5.7 9.7 2.8'' 106° 2015 Leo 11h06m54.20s +01°57'19.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright light orange star. As seeing resolves it to a disk and eliminates the diffraction, a tiny, faint star appears, planet-like, (~3") from the star. Only at the best moments, visibility of B star helped by averted vision.
STF1512 9.3 9.5 9.9'' 51° 2015 UMa 11h09m13.09s +62°29'51.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty, near equal bluish-white stars
STF1514 9.5 10.6 1.3'' 341° 2015 UMa 11h11m38.55s +66°06'48.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Extremely fine! It is at the base of a kite asterism, the fainter star of four. The three arcing the top of the kite are equal magnitude. STF 1514 is a very tight 1.5" but clean split, 1 delta mag. Nice!
ENG45 AB 7.2 8.3 135.0'' 247° 2016 UMa 11h11m48.95s +42°49'55.60"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Finder split, white, 0.5 delta mag.
HO50 6.5 8.4 3.0'' 35° 2017 UMa 11h13m40.09s +41°05'19.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Good disk of A star with momentary perfection, but cannot see B, I think the magnitue in WDS is overstated.
Mark McCarthy
Fremont (California/USA)
762mm (457x) The pair split immediately at 457x. A little diffraction but no doubt a small blue point just outside the first ring. Using the 8-inch aperture mask (effectively 8-inch f/18!) had a nice star image of A but B disappeared -- it became an averted vision, threshold object. Barlow here was no help to show it better. I think Ho 50B is fainter than the current data, and if the older data say it should be fainter, then it may well be variable. However, later in the night, I estimated Ho 50B to be as bright as STF 1964D, which is 9.02
STF1517 AB 7.5 8.0 0.7'' 314° 2017 Leo 11h13m40.99s +20°07'43.30"
Mark McCarthy
Fremont (California/USA)
317mm (340x) Very tight, hair split small orange stars of equal magnitude. Wow!
STF1521 7.7 8.1 3.7'' 98° 2017 Leo 11h15m20.95s +27°34'15.60"
Berthold Fuchs
Wiesbaden (Germany)
130mm close DS ../projects/doublestars/berthold_fuchs/photographs/STF 1521.png
★★ STF1519 9.0 9.9 1.5'' 289° 2017 UMa 11h15m36.65s +59°46'43.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 1 delta mag, tight 1.5" faint yellow stars.
★★ STF1523, xi UMa, 53 UMa, Alula Australis AB 4.3 4.8 1.9'' 166° 2017 UMa 11h18m10.90s +31°31'45.00"
Robert Zebahl
Leipzig (Germany)
55mm (83x) 2019-02-09: Already seen as '8' at 83x. At 125x the overlapping of both Airy disks was visible, but also a slight difference in brightness. ../projects/doublestars/robert_zebahl/sketches/2019-02-09_xi_uma.jpg
Robert Zebahl
Leipzig (Germany)
70mm (100x) 2018-02-18: Very close together with similar brightness. At first glance seen as an '8', looking closer I partly split both components. Similar view also at 128x.
Uwe Pilz
Leipzig (Germany)
105mm (288x) Gemessen: 162°
Robert Zebahl
Leipzig (Germany)
120mm (168x) 2018-02-14: Well split with slight difference in brightness.
Robert Zebahl
Leipzig (Germany)
152mm (129x) 2019-02-06: Well split with visible difference in brightness. The colors of both components appeared equal.
STF1524, nu UMa, 54 UMa, Alula Borealis AB 3.6 10.1 7.8'' 145° 2015 UMa 11h18m28.74s +33°05'39.50"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Tight white near equal pair.
STT233 AB 7.2 10.2 4.7'' 335° 2015 UMa 11h18m46.75s +66°41'03.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White with 3-4x fainter B, well separated. ~10th mag. Seeing needs to still.
STF1525 9.9 9.9 2.3'' 173° 2017 UMa 11h19m29.37s +47°28'12.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal faint, 9th-10th mag, 3".
STF1536, iot Leo AB 4.1 6.7 2.1'' 97° 2017 Leo 11h23m55.37s +10°31'46.90"
Mark McCarthy
Fremont (California/USA)
317mm (340x) Quite close, very bright yellow white A and brownish B, split in A's diffraction ring.
HJ4433, 81 Leo AB 5.6 10.8 55.2'' 2014 Leo 11h25m36.37s +16°27'23.50"
Mark McCarthy
Fremont (California/USA)
317mm (170x) bright orange-yellow A with a much fainter blue B, widely separated, a beautiful sight.
Mark McCarthy
Fremont (California/USA)
317mm (340x) 81 Leonis: Bright yellowish A, very faint bluish B, wide separation
★★ STF1540, 83 Leo AB 6.5 7.5 28.1'' 149° 2017 Leo 11h26m45.32s +03°00'47.20"
Stefan Loibl
Rosenheim (Germany)
10x50 clearly split, little difference in magnitude
Robert Zebahl
Leipzig (Germany)
55mm (16x) Wonderful double with slight color contrast in a very nice field. Together with tau Leo stunning view. Slightly unequal. A appeared white-yellowish, B rather gray-bluish. ../projects/doublestars/robert_zebahl/sketches/2019-03-09_83_leo_tau_leo.jpg
Mark McCarthy
Fremont (California/USA)
80mm (13x) Finder split, in same field as Tau.
Mark McCarthy
Fremont (California/USA)
317mm (340x) Yellow A and reddish B wide separation.
STF1541 8.0 10.1 7.8'' 27° 2015 UMa 11h27m39.46s +46°17'33.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty yellow-white and slight blue, 1-1.5 delta mag, wide ~4".
★★ STFA19, 84 Leo, tau Leo AB 5.0 7.5 88.5'' 182° 2018 Leo 11h27m56.23s +02°51'22.50"
Robert Zebahl
Leipzig (Germany)
55mm (16x) Wonderful double with slight color contrast in a very nice field. Together with 83 Leo stunning view. Noticeable unequal. A appeared white-yellowish with a hint of orange, B gray-bluish. ../projects/doublestars/robert_zebahl/sketches/2019-03-09_83_leo_tau_leo.jpg
Mark McCarthy
Fremont (California/USA)
80mm (13x) Finder split, the A star is prismatic in color effects, bluish B
Mark McCarthy
Fremont (California/USA)
317mm (340x) Bright yellow A, bluish B, very widely separated
STF1547, 88 Leo AB 6.3 9.1 15.6'' 332° 2017 Leo 11h31m44.94s +14°21'52.20"
Robert Zebahl
Leipzig (Germany)
55mm (42x) Well split with moderate distance. Primary component appeared white-yellowish. Pretty unequal pair.
Mark McCarthy
Fremont (California/USA)
317mm (340x) Bright yellow A, 3x fainter red B. Wide separation.
Mark McCarthy
Fremont (California/USA)
317mm (340x) 88 Leonis: A favorite! Yellow and blue pair, wide
★★ STT235 AB 5.7 7.5 0.9'' 43° 2017 UMa 11h32m20.76s +61°04'57.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice! Yellow and orange, 1.5 delta mag, split when seeing shows perfect disks. The stars both show albedo effects, look like suns / globes with shadowing.
★★ STF1552, 90 Leo AC 6.3 9.8 62.8'' 235° 2017 Leo 11h34m42.50s +16°47'48.90"
AB 6.3 7.3 3.5'' 209° 2017
Robert Zebahl
Leipzig (Germany)
55mm (42x) AB: A and B very tight and unequal. Much fainter component C very wide apart. All components almost in line. Very nice view. ../projects/doublestars/robert_zebahl/sketches/2019-03-09_90_leo.jpg
Mark McCarthy
Fremont (California/USA)
317mm (170x) AB: 90 Leonis, a close but easily split pair at 170x, a yellow-white A and a bluish-white B.
STF1555 AB 6.4 6.8 0.8'' 149° 2016 Leo 11h36m17.94s +27°46'52.70"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) blickweise gerade eben trennbar ../projects/doublestars/frederik_wanink/sketches/STF1555.jpg
Mark McCarthy
Fremont (California/USA)
317mm (443x) Nice! AB tight hair-split white pair, with fainter & wide separated AB-C in a row to the east.
HJ503 AB-C 5.8 11.2 22.5'' 156° 2016 Leo 11h36m17.94s +27°46'52.70"
Mark McCarthy
Fremont (California/USA)
317mm (443x) Nice! STF 1555AB tight hair-split white pair, with fainter & wide separated C in a row to the east.
STT575, 62 UMa AB 5.8 9.8 46.4'' 310° 2012 UMa 11h41m34.26s +31°44'45.80"
Mark McCarthy
Fremont (California/USA)
317mm (443x) 62 UMa. Bright and 3 delta mag wide B.
STF1568 10.4 10.5 9.2'' 43° 2015 Vir 11h43m16.61s +00°45'40.10"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1568.png
HU729 7.1 10.9 1.5'' 346° 2015 UMa 11h47m50.02s +49°49'22.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White star resolves to disk with seeing, but B not there. Apodizing mask did not help resolve.
STFB7, 93 Leo AB 4.6 9.0 77.0'' 356° 2015 Leo 11h47m59.23s +20°13'08.20"
Stefan Loibl
Rosenheim (Germany)
10x50 weak companion directly visible most of the time
BU603 AB 6.0 8.5 1.0'' 332° 2014 Leo 11h48m38.71s +14°17'03.20"
Uwe Pilz
Leipzig (Germany)
105mm (288x) nicht getrennt
ARG101 6.3 9.3 46.2'' 274° 2016 UMa 11h51m09.51s +33°22'30.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White star 8th mag, with very faint 2 delta mag very wide B.
STF1575 7.4 7.9 30.7'' 209° 2015 Vir 11h51m57.57s +08°49'48.00"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1575.png
STF1579, 65 UMa AB-C 6.7 8.3 3.8'' 40° 2017 UMa 11h55m05.74s +46°28'36.60"
AB-D 6.7 7.0 63.7'' 113° 2017
Robert Zebahl
Leipzig (Germany)
55mm (27x) AB-D: Easy to separate with large distance and very small difference in brightness. The D-component showed a bluish tint, the lighter one (AB) a slightly yellowish tint. At higher magnification also the faint C component is visible.
Robert Zebahl
Leipzig (Germany)
55mm (83x) AB-C: Easy to split, but the faint C component only appeared as a tiny star. ../projects/doublestars/robert_zebahl/sketches/2019-02-09_65_uma.jpg
STT243 9.1 9.7 1.2'' 2017 UMa 11h59m48.70s +53°23'52.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Super tight split ~1", faint, white, 1 delta mag. M109 is nearby just in of FOV. This pair just beneath its core
STF1596, 2 Com 6.2 7.5 3.7'' 236° 2017 Com 12h04m16.60s +21°27'33.00"
Mark McCarthy
Fremont (California/USA)
317mm (443x) Yellow-white A, 2 delta mag B. Pretty wide.
STF1600 7.6 8.3 7.8'' 94° 2015 UMa 12h05m34.42s +51°55'52.20"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Pretty orange and blue pair, 8-9 mag, 1.5 delta mag, wide separation ~10"
HU1136 6.3 10.2 1.9'' 217° 1992 UMa 12h05m39.70s +62°55'59.30"
Mark McCarthy
Fremont (California/USA)
317mm (885x) Tried real hard, up to 885x, but can't say I have it. Thought I had a condensation in the diffraction when seeing settled but not consistent and not a point.
S634 7.2 8.8 4.7'' 302° 2017 Crv 12h11m22.93s -16°47'27.10"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Pair of orange stars of equal magnitude widely separated at either end of the FOV. There are two faint blue pairs closer in to one of these. (The orange and the blue are the pair, though it's a surprise since the two orange stars look identical, may have formed together?)
STF1607 AB 8.9 9.8 26.7'' 28° 2017 CVn 12h11m33.63s +36°05'21.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide split, 0.5 delta mag.
STF1609 AB 8.0 9.6 11.1'' 205° 2015 UMa 12h11m41.76s +50°50'15.80"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Orange and blue, 2 delta mag, pretty.
STF1613 9.3 9.4 1.2'' 2017 CVn 12h12m34.01s +35°45'45.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very tight equal white, splits clean with the seeing
STF1618 9.5 9.5 26.0'' 245° 2015 Vir 12h15m03.46s +09°59'27.10"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1618.png
A1781 10.2 11.0 2.9'' 303° 2017 CVn 12h16m19.33s +44°43'25.90"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Very fine faint pair, 1 delta mag, ~3"
STF1626 9.4 9.6 2.1'' 2017 Dra 12h16m47.11s +70°08'45.70"
Robert Zebahl
Leipzig (Germany)
120mm (150x) Components similar in brightness, pretty faint, close together, but clearly split.
STT245 5.7 11.2 8.4'' 282° 2016 Com 12h17m30.60s +28°56'13.60"
Mark McCarthy
Fremont (California/USA)
317mm (443x) Yellow-white A with very faint B due west, wide separation.
STF1628 AB 9.5 10.1 9.6'' 240° 2015 Vir 12h18m42.90s +11°47'46.30"
AC 9.5 11.8 45.1'' 345° 2015
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1628.png
STF1630 9.5 10.3 2.5'' 171° 2017 UMa 12h18m53.81s +56°22'06.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) ~2", half a delta mag, faint pair, nice.
BU27 7.1 10.5 3.6'' 104° 2015 Com 12h20m04.86s +13°51'18.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Light orange A and very faint bluish B, seen with averted vision at first then can hold direct. ~4" to west. Nice!
STF1633 7.0 7.1 8.9'' 245° 2017 Com 12h20m41.37s +27°03'16.40"
Mark McCarthy
Fremont (California/USA)
317mm (443x) Yellow-white, equal brightness, wide separation to NE.
SHJ143, 12 Com AC 4.9 8.9 59.0'' 168° 2012 Com 12h22m30.32s +25°50'46.30"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Wide separation white and bluish, 3 delta mag. I feel like there is a fainter star closer in and 90 degrees PA from the B star. [AB is the fainter pair, 4.86/11.8 36.7", AC is the main pair described.]
Mark McCarthy
Fremont (California/USA)
203mm (205x) Wide separation white and bluish, 3 delta mag. Feel like there is a fainter star closer in and 90 degrees PA from the companion star (this is AB).
STF1636, 17 Vir 6.5 9.3 21.0'' 338° 2017 Vir 12h22m32.14s +05°18'20.10"
Mark McCarthy
Fremont (California/USA)
317mm (340x) 17 Virginis, widely separated, large magnitude difference, with a yellow-white A and a ruddy / brownish B
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1636.png
STT249 AB 8.2 9.2 0.4'' 263° 2011 UMa 12h23m50.80s +54°09'30.50"
Mark McCarthy
Fremont (California/USA)
317mm (738x) very slightly notched elongation / overlapped disks.
STF1639 AB 6.7 7.8 1.9'' 324° 2017 Com 12h24m26.81s +25°34'56.70"
Mark McCarthy
Fremont (California/USA)
203mm (205x) White and slightly blue pair, close, around 3"
Mark McCarthy
Fremont (California/USA)
203mm (205x) White and slightly blue pair, close, around 3"?
Mark McCarthy
Fremont (California/USA)
317mm (443x) Close but well split, 1.5 delta mag, ~2.5"
STF1642 8.8 9.4 2.5'' 180° 2017 CVn 12h25m45.00s +44°44'04.40"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Very nice light orange and blue, 1 delta mag, ~3"
STF1643 AB 9.0 9.4 2.7'' 2017 Com 12h27m13.72s +27°01'29.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Equal orange pair, ~3", PA to north.
STF1645 7.5 8.1 9.8'' 156° 2017 CVn 12h28m04.45s +44°47'39.50"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Wide, bright yellowish-white pair, ~1 delta mag
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1645.png
STF1646 10.3 12.9 5.6'' 260° 2017 CVn 12h28m09.12s +36°41'02.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and blue. Need averted vision for B to reveal itself. Pretty!
STT251 8.3 9.3 0.8'' 61° 2017 CVn 12h29m07.72s +31°23'25.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Decidedly not round disk -- there's also a brightening in the diffraction. Marginal.
SHJ145, delta Crv, 7 Crv, Algorab AB 3.0 8.5 24.0'' 215° 2015 Crv 12h29m51.86s -16°30'55.60"
Robert Zebahl
Leipzig (Germany)
70mm (47x) Large difference in brightness and pretty wide apart. Primary component appeared white-bluish. The B component was too faint for seeing colors.
HJL1069 7.8 10.1 115.4'' 312° 2015 Com 12h30m19.91s +21°56'53.60"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Lovely wide pair, 2.5 delta mag. Clean image
Mark McCarthy
Fremont (California/USA)
203mm (205x) Lovely wide pair, 2.5 delta mag.
J1023 11.1 11.3 5.2'' 173° 2015 CVn 12h30m46.44s +36°39'34.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Excessively faint, averted vision required to pick out, well separated.
★★★ SHJ146 AB 7.7 8.7 49.5'' 290° 2017 Vir 12h31m14.61s +01°19'37.00"
Robert Zebahl
Leipzig (Germany)
70mm (33x) Visible difference in brightness and color. I couldn't precisely define the colors itself, but A appeared rather orange, B rather bluish.
Robert Zebahl
Leipzig (Germany)
102mm (28x) Pretty wide pair with visible difference in brightness and lovely color contrast. A: pale orange, B: light blue.
STF1652 10.1 10.4 6.1'' 178° 2017 Com 12h32m31.07s +21°06'03.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint near equal, pretty wide 5-6".
STF1653 9.7 9.7 8.0'' 343° 2017 CVn 12h33m22.34s +32°02'23.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Easy, near equal pair, yellowish A and bluish B. ~10"
STF1657, 24 Com 5.1 6.3 20.2'' 271° 2018 Com 12h35m07.76s +18°22'37.40"
Robert Zebahl
Leipzig (Germany)
102mm (28x) Very beautiful view with moderate distance and difference in brightness. A: glossy, light orange, B: white- bluish.
Robert Zebahl
Leipzig (Germany)
200mm (60x) Well split with obvious difference in brightness. Fainter component appeared bluish, the brighter one slightly orange.
Mark McCarthy
Fremont (California/USA)
203mm (205x) Very pretty bright light orange and fainter blue, wide separation. Such a sight!
Mark McCarthy
Fremont (California/USA)
203mm (205x) COM 24. Very pretty bright light orange and fainter blue, wide separation.
Mark McCarthy
Fremont (California/USA)
317mm (443x) 24 Com. Pretty orange and blue pair, 2 delta mag, very wide
★★★ STF1670, gamma Vir, 29 Vir, Porrima AB 3.5 3.5 2.7'' 2018 Vir 12h41m39.60s -01°26'57.90"
Robert Zebahl
Leipzig (Germany)
55mm (56x) 2019-05-18: At 38x slightly elongated. At 56x touching diffraction disks. At 71x clearly separated with very small gap.
Robert Zebahl
Leipzig (Germany)
70mm (104x) 2019-05-04: At 47x clearly visible as '8', at 73x split with almost touching diffraction disks. At 104x clearly separated, equally bright and pretty close together. The gap was smaller than the diameter of the diffraction disk.
Robert Zebahl
Leipzig (Germany)
102mm (125x) 2019-05-01: Extremely nice double star! Equally bright and relatively close together. Both components appeared yellowish-white.
Uwe Pilz
Leipzig (Germany)
105mm (200x) weiß-weiß, die nördliche Komponente ist eine Winzigkeit heller
Mark McCarthy
Fremont (California/USA)
317mm (170x) Porrima. Very pretty yellow-white, near equal, close split at 170x. Star disks improved with apodizing mask.
HO256 7.3 9.6 0.7'' 116° 2001 CVn 12h44m08.82s +35°46'07.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) The airy disk is not clean indicating it's not single, but can't split for the seeing. Marginal
STF1678 7.2 7.7 37.7'' 170° 2018 Com 12h45m26.17s +14°22'24.90"
Mark McCarthy
Fremont (California/USA)
317mm (443x) Wide separation near equal white pair
STF1679 AB 9.6 10.0 5.9'' 208° 2017 CVn 12h46m00.83s +49°49'23.00"
AC 9.6 13.7 69.1'' 37° 2015
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB: Fairly faint equal magnitude, 3"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1679.png
STF1694 AB 5.3 5.7 21.8'' 324° 2017 Cam 12h49m13.80s +83°24'46.30"
Robert Zebahl
Leipzig (Germany)
70mm (15x) Easy to split with noticeable angular distance and slight difference in brightness. The faint component tends to be more bluish, the brighter one appeared more light yellowish.
STF1681 8.9 8.9 9.2'' 17° 2016 Vir 12h49m34.82s +03°49'05.60"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1681.png
STF1685 AB 7.3 7.8 15.8'' 200° 2015 Com 12h51m54.80s +19°10'19.90"
Mark McCarthy
Fremont (California/USA)
317mm (443x) Wide white pair, 1 delta mag
Mark McCarthy
Fremont (California/USA)
317mm (553x) Brighter white A, 0.5 delta mag B, pretty wide separation.
STF1686 AB 8.6 8.7 5.7'' 187° 2015 Com 12h52m58.16s +15°01'53.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Fine near equal pair of yellow-white stars, wide separation, PA to south.
STF1687, 35 Com AC 5.2 9.8 28.5'' 127° 2016 Com 12h53m17.77s +21°14'42.10"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Rich light yellow and much fainter wide blue B. Near M64. [Need to re-observe. I saw the wide AC, but not the AB which is 5.15/7.08 1.2"
Mark McCarthy
Fremont (California/USA)
317mm (205x) Rich light yellow and much fainter wide blue B. Near M64. (Need to re-observe. I saw the wide AC, but not the AB which is 5.15/7.08 1.2")
Mark McCarthy
Fremont (California/USA)
317mm (443x) Orange and blue, 3 delta mag, very wide separation to the east. Did not notice AB
STF1687, 35 Com AB 5.2 7.1 1.2'' 200° 2018 Com 12h53m17.77s +21°14'42.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 35 Com: Bright orange & fainter B, showpiece, ~1.5"
STF1688 AB 9.2 11.1 14.4'' 344° 2015 CVn 12h53m35.26s +37°58'20.90"
Mark McCarthy
Fremont (California/USA)
317mm (71x) a faint pair, yellow A and orangish B, which I identified using 340x, but can still split at 71x with STF 1692 & STF 1702 in the same low power field
MET9 5.7 7.8 1.7'' 51° 2013 Com 12h54m39.98s +22°06'28.80"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Using 8" 205x I see nothing. 8" 410x suspect elongation. 8" 667x I see a fleeting, bluish point just outside of first diffraction ring. A is light yellow orange and bright, 2 delta mag. to B. A star feels elongated / egg shaped. With 20" and 667x the seeing is too messy though there is a knot in the diffraction where I had noticed the point with 8". Strong feeling A is elongated.
Mark McCarthy
Fremont (California/USA)
203mm (667x) At 205x see nothing. 410x suspect elongation. 667x see a fleeting, bluish point just outside of first diffraction ring. A is light yellow orange and bright, 2 delta mag. to B. A feels elongated / egg shaped. At 20" and 667x the seeing is too messy though there is a knot in the diffraction where I had noticed the point with 8". Strong feeling A is elongated.
STF1689 7.1 9.1 30.2'' 223° 2015 Vir 12h55m30.32s +11°29'46.40"
Mark McCarthy
Fremont (California/USA)
317mm (443x) Orange and blue, very wide separation
★★ STF1692, 12 CVn, alpha CVn, Cor Caroli AB 2.9 5.5 19.3'' 229° 2017 CVn 12h56m01.67s +38°19'06.20"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Beautiful view. Clearly unequal with nice angular distance. Primary component appeared in pale yellow, secondary component silvery-white.
Uwe Pilz
Leipzig (Germany)
105mm (66x) blauweiß-orange, trennbar bei 16x
Uwe Pilz
Leipzig (Germany)
105mm (200x) schon bei 26x getrennt ../projects/doublestars/uwe_pilz/sketches/CorCaroli.jpg
Robert Zebahl
Leipzig (Germany)
114mm (28x) Well split with big difference in brightness.
Mark McCarthy
Fremont (California/USA)
203mm (205x) Cream white and light canary yellow. Well separated, 2 delta mag.
Mark McCarthy
Fremont (California/USA)
203mm (205x) Cor Caroli: Cream white and light canary yellow. Well separated, 2 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (71x) Cor Caroli. Cream and bluish, use low power to fit STF 1688 & STF 1702 in the same field.
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1692.png
STT256 7.3 7.6 1.1'' 101° 2017 Vir 12h56m26.59s -00°57'16.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide separation equal brightness white stars
BU925 7.0 11.1 6.5'' 209° 2016 CVn 12h56m38.81s +43°33'07.20"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Bright white and extremely faint B, wide separation. B flashes with averted vision to see, can hold with direct vision with seeing
STT257 8.5 9.6 13.0'' 353° 2017 CVn 12h56m44.77s +45°36'45.10"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Wide white and dull blue-white pair.
STF1696 9.4 9.5 3.7'' 204° 2017 Com 12h57m24.25s +30°22'15.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Fairly faint near equal white pair.
STF1702 8.7 9.4 35.9'' 83° 2017 CVn 12h58m31.97s +38°16'43.60"
Mark McCarthy
Fremont (California/USA)
317mm (71x) wide orange-yellow pair, in same low power field as STF 1692 & STF 1688
STF1699 8.7 8.8 1.7'' 12° 2017 Com 12h58m40.88s +27°28'27.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Close 1.5" equal white.
STF1701 7.6 9.9 21.5'' 306° 2015 Vir 12h59m20.16s +06°30'21.10"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1701.png
78 UMa, BU1082 5.0 7.9 0.8'' 127° 2017 UMa 13h00m43.59s +56°21'58.80"
Uwe Pilz
Leipzig (Germany)
105mm (260x) nicht getrennt
STF1709 7.9 10.0 2.7'' 252° 2016 Com 13h02m30.62s +23°29'57.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice! Brighter yellowish white A and 4 delta magnitude B, wide separation ~3" to west.
STF1712 10.2 10.6 9.1'' 332° 2016 Vir 13h03m32.39s +09°28'08.00"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1712.png
STF1718 AB-C 9.8 10.1 12.7'' 272° 2014 CVn 13h05m30.27s +50°59'11.00"
Mark McCarthy
Fremont (California/USA)
317mm (277x) faint equal pair with wide separation. AB is 0.2" not seen--BU 643
HJ2638 A-BC 7.5 11.1 6.2'' 223° 2015 Com 13h06m10.29s +29°01'45.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint blue preceding a bright white. Did not notice BC, BU 1083, 0.4"
HJ2639 AB 7.5 11.2 36.0'' 158° 2015 CVn 13h06m13.50s +40°55'21.00"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Nice triple. Orange-yellow A and bluish 2 delta mag B and C, wide sep.
HJ2639 AC 7.5 10.8 52.3'' 137° 2015 CVn 13h06m13.50s +40°55'21.00"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Nice triple. Orange-yellow A and bluish 2 delta mag B and C, wide sep.
COU11, 39 Com AB 6.1 8.8 1.8'' 314° 2015 Com 13h06m21.28s +21°09'12.60"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Probably 2" separation, 2 delta mag. Tough observation
Mark McCarthy
Fremont (California/USA)
203mm (667x) 39 Com. Probably 3" separation, 2 delta mag.
STF1719 AB 7.6 8.2 7.1'' 358° 2016 Vir 13h07m19.75s +00°35'06.70"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1719.png
STF1723 8.7 10.1 6.3'' 12° 2015 CVn 13h08m13.49s +38°44'20.20"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Yellow and blue, around 5", 2 delta mag
Mark McCarthy
Fremont (California/USA)
508mm (205x) Light yellow and light orange, 1.5 delta mag, well split
Mark McCarthy
Fremont (California/USA)
508mm (205x) Light yellow and light orange, 1.5 delta mag, well split.
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1723.png
STF1722 8.4 9.3 2.5'' 337° 2017 Com 13h08m26.46s +15°29'29.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange A, 1 delta mag B, ~3". Faint pair.
STF1724, theta Vir, 51 Vir AB 4.4 9.4 6.8'' 342° 2014 Vir 13h09m57.01s -05°32'20.10"
Robert Zebahl
Leipzig (Germany)
70mm (47x) Easy to split with large difference in brightness. Very faint B component clearly apart from the primary component.
STF1728, 42 Com AB-C 4.4 11.4 84.8'' 349° 2014 Com 13h09m59.28s +17°31'46.00"
Mark McCarthy
Fremont (California/USA)
317mm (443x) Alpha Com: Bright yellow, very faint blue B
STFA24 AB 6.0 6.3 275.6'' 296° 2012 CVn 13h10m03.27s +38°29'55.90"
This double star contains of the components 15 and 17 CVn.
Robert Zebahl
Leipzig (Germany)
8x40 Both components similar in brightness with large distance.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Wide bright pair
STT261 7.4 7.6 2.6'' 339° 2017 CVn 13h12m02.02s +32°05'07.90"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Light yellow-white equal pair, ~1.5"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Light yellow-white equal pair, ~1.5".
SHJ162 AB 7.1 8.2 113.2'' 45° 2017 Vir 13h14m55.72s -11°22'09.90"
Mark McCarthy
Fremont (California/USA)
317mm (340x) a widely separated yellow A and orange B, 1 magnitude difference.
BGH46 AB 6.5 7.6 203.1'' 58° 2015 Com 13h16m32.26s +19°47'07.00"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Wide finder split, 1 delta mag, not much to recommend. Triangle of stars to the south, pointing to Bgh 46. [I did look at this at 667x to see if one of the wide pair had a pair of its own, but did not scrutinize well enough. This one should try on a really good night with 20": HDS1862 = Aa,Ab 6.56/9.69 0.4".]
BU800 AB 6.7 9.5 7.6'' 104° 2018 Com 13h16m51.05s +17°01'01.90"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Lovely yellow and orange, very pretty. Wide separation, 2.5 delta mag.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Lovely yellow and orange, very pretty, wide separation, 2.5 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Not difficult, orange-yellow A with bluish B, 3 delta mag. pretty wide to east.
★★ HU644 AB 9.1 9.9 0.4'' 79° 2017 CVn 13h19m45.58s +47°46'41.10"
Mark McCarthy
Fremont (California/USA)
317mm (443x) Orange-red pair, near equal mag, split with seeing at 443x
STF1734 6.8 7.3 1.1'' 173° 2017 Vir 13h20m41.57s +02°56'31.90"
Robert Zebahl
Leipzig (Germany)
70mm (104x) Double star appeared slightly elongated without noticeable constriction.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Blue-white A, light orange B, half delta mag, close ~1.5". Nice!
HO259 AB 7.7 12.7 10.0'' 245° 2015 Com 13h22m34.15s +26°06'56.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) B is very faint, averted vision only, fairly wide sep. ~10-12" to west.
STF1740 7.1 7.4 26.1'' 75° 2016 Vir 13h23m39.16s +02°43'24.00"
Stefan Loibl
Rosenheim (Germany)
10x50 close double star for binoculars, clearly split, component A slightly reddish
Robert Zebahl
Leipzig (Germany)
70mm (33x) Easy to separate, slightly unequal with moderate angular distance. A: pale orange, B: color not clearly perceptible.
Mark McCarthy
Fremont (California/USA)
203mm (333x) hair split equal white pair. Suspected elongation at 205x but needed 333x to split. 667x too much power given the conditions.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Easy wide white A and hint or orange B.
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1740.png
★★ STF1744, zeta UMa 79 UMa, zeta UMa, Mizar AB 2.2 3.9 14.4'' 153° 2017 UMa 13h23m55.42s +54°55'31.50"
Mizar + Alcor AC 2.2 4.0 707.7'' 72° 2017
Robert Zebahl
Leipzig (Germany)
102mm (28x) First pastel sketch (Pitt pastel by Faber-Castell) of a double star on black paper, where also the halos were sketched around the stars. The stars themselves were redrawn with an Edding (Edding 1500, Soft Pastel white). ../projects/doublestars/robert_zebahl/sketches/2019-08-14_mizar_alcor.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) AB: mit viel Schwarz zwischen den Beugungsscheiben (1“9) ../projects/doublestars/uwe_pilz/sketches/zetaUMa.jpg
Joerg S. Schlimmer
Germany
127mm (87x) easy to split ../projects/doublestars/joerg_schlimmer/sketches/Zeichnung_Alkor-Mizar_ausschnitt_filtered.jpg
STF1746 7.7 10.7 22.8'' 246° 2015 Vir 13h28m09.72s +09°27'40.10"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1746.png
STT266 8.0 8.4 2.0'' 358° 2018 Com 13h28m26.68s +15°42'30.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Close 2" near equal white. Period of 1954.11 years. Near its closest separation now (May 2017), will be ~4" by the year 2822.
STF1752 AB 8.2 9.9 1.0'' 107° 2017 UMa 13h28m49.82s +59°55'41.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange star perhaps a little elongated, tough.
STF1750, 72 Vir 6.1 10.7 30.0'' 17° 2015 Vir 13h30m25.72s -06°28'13.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 72 Vir: Wide split, yellow-white A and ~10th mag B, 3 delta mag.
STT268, FK Com AB 7.7 13.0 19.1'' 78° 2015 Com 13h30m52.21s +24°14'15.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint wide B, bluish. Averted vision best, and with seeing.
STF1755 7.3 8.1 4.2'' 130° 2017 CVn 13h32m21.99s +36°49'05.60"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Pretty orange and blue, 5-6", 2 delta mag. Nice.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and blue, wide, 2 delta mag.
VYS6, VW Com 11.4 11.3 2.6'' 54° 2016 Com 13h32m44.59s +16°48'39.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) VW Com. Seen best with averted vision and when seeing stills. Close but pretty well split, ~2-3". Extremely faint reddish pair, PA NE.
A567 6.2 9.7 1.4'' 256° 2015 Com 13h32m48.21s +24°20'48.30"
Christopher Hay
Seeheim (Germany)
150mm (96x) At a position angle of roughly 265° I had the feeling something was going on; a kind of protusion of the primary, coming and going. 200x: yes, now a stellar condensation kept popping in and out of sight at the same position, just on the outside of the first ring, which itself was coming and going in not-so-perfect seeing. Upping the magnification to 240x and 300x didn't improve the view.
Mark McCarthy
Fremont (California/USA)
317mm (553x) very faint B, very close, ~1" when seeing stills, 3-4 delta magnitude. Surprised it is not so difficult. B looks like it doesn't have any light of its own and is illuminated by A.
STT269 AB-C 6.8 9.2 123.4'' 332° 2012 CVn 13h32m51.02s +34°54'25.80"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Wide but pretty faint pair, 2 delta mag. Did not detect 0.3" AB
STF1758 8.7 8.9 3.3'' 290° 2015 CVn 13h32m51.51s +49°08'24.30"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Nice near equal pair, slightly yellow, ~5"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Nice near equal pair, slightly yellow, ~5"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Evenly matched yellow-orange pair ~4". Nice
STF1756 AB 9.9 10.4 14.7'' 177° 2016 Com 13h33m19.04s +23°00'51.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide white pair, 0.5 delta mag.
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1756.png
STF1757 AB 7.8 8.8 1.7'' 141° 2017 Vir 13h34m16.38s -00°18'49.80"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Close, ~2", a dull orange, ~1.5 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange-yellow, half a delta mag, pretty, ~1.5"
BU114 8.1 8.2 1.3'' 173° 2018 Vir 13h34m17.72s -08°37'07.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice near equal, slightly yellow white stars, ~10th mag. In 80mm finder it is shown with another widely separated equal pair.
HJ1234 AB 6.4 10.5 28.6'' 2008 CVn 13h34m21.87s +38°47'21.30"
Mark McCarthy
Fremont (California/USA)
317mm (277x) B a faint blue orb, looks like a planet reflecting A's light. Yellow A. Nice!
STF1760 8.8 9.1 8.8'' 64° 2018 Com 13h34m23.81s +26°16'34.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright white, pretty wide separation, equal magnitude.
BU932 AB 6.3 7.3 0.4'' 66° 2016 Vir 13h34m40.48s -13°12'51.50"
Mark McCarthy
Fremont (California/USA)
317mm (170x) Out of round with apodizing mask
STF1768, 25 CVn AB 5.0 7.0 1.7'' 95° 2017 CVn 13h37m27.70s +36°17'41.40"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Very tight pair, a little more than hairline split, ~2 delta mag.
Mark McCarthy
Fremont (California/USA)
203mm (205x) Very tight pair, a little more than hairline split, ~2 delta mag. 8" 333x: white and dull blue, ~1", Nice!
Mark McCarthy
Fremont (California/USA)
203mm (333x) White and dull blue, ~1" Nice!
Frederik Wanink
Itterbeck (Germany)
254mm (640x) schwierig wegen Helligkeitsunterschied ../projects/doublestars/frederik_wanink/sketches/25CVn.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) Very pretty pale yellow and orange, 2-3 delta mag, ~2"
STF1763 AB 7.8 8.1 2.7'' 39° 2017 Vir 13h37m35.30s -07°52'16.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 81 Vir: near equal orange stars, ~3", 9th mag. Nice!
STF1770 6.9 8.2 1.8'' 128° 2017 UMa 13h37m42.92s +50°42'53.50"
Mark McCarthy
Fremont (California/USA)
317mm (443x) Tight light orange pair, 2 delta mag, ~1".
STF1764 AB 6.8 8.6 15.9'' 32° 2017 Vir 13h37m44.01s +02°22'56.50"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Orange and 2x fainter blue, wide. Another equal wide pair to the south.
STF1769 AC 7.9 9.3 56.2'' 259° 2015 CVn 13h38m01.95s +39°10'41.00"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Wide separated blue stars, half delta mag.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Wide separated blue stars, half delta mag. 2+1 system? 1 delta mag fainter star quite more widely separated. (Sextuple system. I missed the 1.6" AB, need to re-observe; saw the AC pair only -- the fainter star noticed may be part of the system.)
STF1774 6.3 10.5 18.1'' 135° 2015 UMa 13h40m23.35s +50°31'09.40"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Wide white and blue 3 delta mag.
STF1772, 1 Boo AB 5.8 9.6 4.4'' 134° 2017 Boo 13h40m40.50s +19°57'20.40"
Christopher Hay
Seeheim (Germany)
80mm (63x) B pops in and out of view as a very fine pinprick of light reasonably well set off from A. No success at 50x.
Christopher Hay
Seeheim (Germany)
150mm (96x) Well split. Remarkably easy considering the 4-mag difference in brightness. A seems dusky yellow. B perhaps bluish, but hard to determine. 9-mag star a few arcminutes to the north makes the view even more pleasing. According to Stelledoppie AB is a physical double.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright white and 3-4 delta magnitude reddish B, 4-5" to SW.
Berthold Fuchs
Wiesbaden (Germany)
130mm difficult DS ../projects/doublestars/berthold_fuchs/photographs/STF 1772.jpg
STF1776 9.4 9.4 7.3'' 18° 2015 CVn 13h41m47.70s +46°13'11.20"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Near equal white, well split
STF1777, 84 Vir 5.5 8.3 2.7'' 227° 2015 Vir 13h43m03.71s +03°32'16.40"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Light orange and blue-green B, large magnitude difference, ~3". Pretty.
STF1775 AB 7.2 10.1 27.7'' 336° 2012 Vir 13h43m30.35s -04°16'28.10"
Mark McCarthy
Fremont (California/USA)
317mm (340x) a pretty pairing of a bright orange A and a faint bluish B widely separated.
BU115 AC 7.5 13.2 107.3'' 169° 2015 Boo 13h45m20.87s +09°03'28.60"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Slightly orange and very wide separated, much fainter bluish star just visible. Did not notice AB 1.6" 10.4 mag.
BU935, 86 Vir AB 5.7 8.5 1.0'' 304° 2001 Vir 13h45m56.33s -12°25'35.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 86 Vir: Pretty orange star but @ 553x seeing wont allow split of 3 delta mag, 1.2" B. 27" away is equal 11th mag CD pair which I see as a grey smudge
STF1780, 86 Vir AC 5.7 11.9 27.3'' 163° 2000 Vir 13h45m56.33s -12°25'35.60"
Mark McCarthy
Fremont (California/USA)
317mm (340x) 86 Virginis.brighter A and very faint, almost averted vision B widely separated.
STF1781, HT Vir AB 7.9 8.1 1.0'' 195° 2017 Vir 13h46m06.75s +05°06'56.10"
Mark McCarthy
Fremont (California/USA)
203mm (333x) White A and slightly yellow B, ~2", half delta mag
LDS3101 6.4 10.2 488.5'' 105° 2010 Vir 13h46m57.12s +06°21'01.40"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Light yellow A and very much fainter B, 4-5 delta mag., B is just detectable at this aperture Well separated.
S654 AB 5.6 8.9 71.5'' 237° 2015 CVn 13h46m59.77s +38°32'33.70"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Striking yellow-orange and blue-green fainter B.
HJ1244 AB 6.9 10.8 6.9'' 130° 2015 CVn 13h53m20.79s +42°11'05.30"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Wow! Very faint B but can hold it direct vision with the seeing. Well separated from and orange-yellow A.
STF1789 8.6 9.0 6.5'' 327° 2015 CVn 13h54m05.19s +32°49'35.20"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Pretty equal magnitude white, well separated.
Berthold Fuchs
Wiesbaden (Germany)
130mm difficult DS ../projects/doublestars/berthold_fuchs/photographs/STF 1789.png
STF1887 9.2 11.2 3.3'' 226° 2013 UMi 13h54m57.46s +87°23'44.10"
Mark McCarthy
Fremont (California/USA)
203mm (333x) A star yellow, messy with seeing, B nice light blue and clean.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Izar. A yellow, messy with seeing. B nice light blue and clean.
STF1788 AB 6.7 7.3 3.7'' 101° 2018 Vir 13h54m58.20s -08°03'31.90"
Robert Zebahl
Leipzig (Germany)
70mm (47x) Very nice view! Pretty tight together with a moderate difference in brightness.
Mark McCarthy
Fremont (California/USA)
317mm (340x) bright pair of near equal magnitude, both yellow-while color.
STF1793 7.5 8.4 4.9'' 242° 2017 Boo 13h59m05.25s +25°48'57.60"
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 32x kleben beide Komponenten noch aneinander - bei 64x knapp und bei 107x dann gut getrennt - die B-Komponente westlich ist gut eine Größenklasse schwächer
Berthold Fuchs
Wiesbaden (Germany)
130mm close DS ../projects/doublestars/berthold_fuchs/photographs/STF 1793.png
A1097 AB 9.1 8.2 0.4'' 254° 2010 UMa 14h02m00.60s +57°13'28.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Hair-split at best moments, half delta mag, <0.8". A fainter star likely in the system about 30" distant -- this is STF 1800 AB-C.
STF1800 AB-C 7.8 10.4 28.4'' 20° 2015 UMa 14h02m00.60s +57°13'28.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint star ~30" from A1097
BGH50 7.0 8.9 96.9'' 32° 2015 Boo 14h04m45.95s +25°49'03.90"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Finder split. Wide pair, 2 delta mag, dull white. Viewed 8" 205x, no apparent other doubling.
Mark McCarthy
Fremont (California/USA)
203mm (205x) 13x80mm finder split. Wide pair, 2 delta mag, dull white. Viewed 8" 205x, no apparent other doubling
STT276 AB 8.9 9.4 0.4'' 207° 2016 Boo 14h08m11.84s +36°44'56.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Marginal elongation to rod
STT276 AB-C 8.5 10.6 9.5'' 72° 2015 Boo 14h08m11.84s +36°44'56.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 1 delta mag, ~5"
STT275 7.3 10.1 5.0'' 354° 2015 Vir 14h09m11.21s +07°23'05.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange star with very faint B, 3-4 delta mag, wide ~10". Nice!
STF1805 9.0 9.2 4.9'' 34° 2018 Vir 14h09m57.24s +04°00'56.40"
Berthold Fuchs
Wiesbaden (Germany)
130mm close DS ../projects/doublestars/berthold_fuchs/photographs/STF 1805.png
STF1812 AB-C 7.9 9.4 14.0'' 108° 2015 Boo 14h12m26.68s +28°43'02.30"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 20x ist die C-Komponente östlich knapp getrennt von AB gerade so erkennbar - bei 32x dann schön getrenntes Pärchen, C-Komponente deutlich schwächer, vielleicht 2 mag weniger
Mark McCarthy
Fremont (California/USA)
203mm (205x) 2.5 delta mag, pretty wide. There's a third, fainter pair about 4x out from the other separation
Mark McCarthy
Fremont (California/USA)
203mm (205x) A 2+1 system with AB-D. Main pair 2.5 delta mag, pretty wide. The third, fainter pair about 4x the other separation.
STF1813 8.4 8.6 4.8'' 193° 2018 Vir 14h13m24.23s +05°24'03.20"
Berthold Fuchs
Wiesbaden (Germany)
130mm close DS ../projects/doublestars/berthold_fuchs/photographs/STF 1813.png
STF1821, kap Boo AB 4.5 6.6 13.7'' 236° 2017 Boo 14h13m29.00s +51°47'23.80"
Uwe Pilz
Leipzig (Germany)
105mm (144x) weiß-grau, trennbar bei 22x
STT279 6.8 9.1 2.2'' 257° 2018 Boo 14h13m49.46s +11°59'51.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very pretty orange and blue, 2-3", PA SW 2 delta mag
STF1816 7.4 7.8 0.4'' 96° 2011 Boo 14h13m54.63s +29°06'19.50"
Uwe Pilz
Leipzig (Germany)
105mm (88x) gelb ../projects/doublestars/uwe_pilz/sketches/stf1816.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Rod-shaped equal white. July 2017
KUI66, 15 Boo 5.4 8.4 0.8'' 111° 2015 Boo 14h14m50.85s +10°06'02.20"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Light orange and two possible pairs, both very faint on the edge of detection. One closer but still visible, very wide.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Using apodizing mask I had a glimpse of the B star 15% of the time, very small and faint, ~3" and 4-5 delta mag. Both orange.
STF1829 8.1 8.6 5.6'' 151° 2015 Boo 14h15m27.95s +50°26'24.60"
Uwe Pilz
Leipzig (Germany)
105mm (144x) einfach
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal white wide.
STF1831 AB 7.2 9.6 5.8'' 138° 2017 UMa 14h16m08.47s +56°42'45.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) One pair close to another, 5" and 2 delta mag. Part of a widely separated equal pair, and a gang of three stars further away -- five additional pairings in the system.
iota Boo, 21 Boo, STFA26 AB 4.8 7.4 38.9'' 33° 2017 Boo 14h16m10.07s +51°22'01.30"
Uwe Pilz
Leipzig (Germany)
105mm (144x) sehr weit, auffallend bei 22x
STF1825 6.5 8.4 4.4'' 153° 2018 Boo 14h16m32.84s +20°07'18.70"
Mark McCarthy
Fremont (California/USA)
317mm (277x) White and orange, 3 delta mag, well split.
ENG51, 18 Boo 5.4 10.8 164.0'' 219° 2015 Boo 14h19m16.28s +13°00'15.50"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Very wide faint blue star to the south, 5 delta mag.
STF1834 8.1 8.3 1.6'' 104° 2018 Boo 14h20m17.60s +48°30'25.10"
Robert Zebahl
Leipzig (Germany)
120mm (150x) At 108x elongated, at 150x barely split with similarly bright components.
STT281 7.7 9.7 1.5'' 166° 2017 Boo 14h20m20.85s +08°34'56.30"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Very fine, but well split, huge delta mag, surprise!
STF1835 A-BC 5.0 6.8 6.2'' 196° 2018 Boo 14h23m22.74s +08°26'47.90"
Robert Zebahl
Leipzig (Germany)
102mm (62x) At 28x barely split with visible difference in brightness. At 62x easy to separate. The colors seemed similar.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Yellow A and slightly yellow B, wide. Did not notice BU1111 BC, 0.3" 7.4/7.7
Mark McCarthy
Fremont (California/USA)
317mm (277x) In a line of three stars, white and slightly red B. Wide, ~6", 2 delta mag. Did not detect BC 0.3"
Berthold Fuchs
Wiesbaden (Germany)
130mm close DS ../projects/doublestars/berthold_fuchs/photographs/STF 1835.jpg
STF1838 7.5 7.7 9.7'' 335° 2017 Boo 14h24m05.76s +11°14'49.10"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1838.jpg
STF1843 AB 7.7 9.2 19.6'' 187° 2015 Boo 14h24m38.91s +47°49'50.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty wide, 3 delta mag.
STT580, the Boo 4.1 11.5 69.6'' 182° 2003 Boo 14h25m11.79s +51°51'02.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 23 Boo, Theta Boo. Very bright A with very faint B, wide.
STF1850 7.1 7.6 25.1'' 262° 2017 Boo 14h28m33.29s +28°17'25.90"
Rene Merting
Drachhausen (Germany)
16x70 ein gut getrenntes Paar zweier gleich heller Sterne - beide weiß
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 20x locker getrennt - Komponente B ist vielleicht eine halbe Magnitude schwächer als A und strahlt ein wenig dumpfer bzw. weniger weiß
Mark McCarthy
Fremont (California/USA)
203mm (205x) Very wide, 1/2 delta mag.
Mark McCarthy
Fremont (California/USA)
203mm (205x) Very wide, half delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide yellow-white, 1 delta mag.
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1850.jpg
STF1854 AB 6.0 10.6 26.1'' 256° 2015 Boo 14h29m49.66s +31°47'28.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright blue-white A, faint pair to the west, wide
BU1443 6.2 10.6 55.7'' 195° 2017 Vir 14h30m45.39s +04°46'20.20"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Light yellow-orange A and much fainter blue B, wide separation.
BU117 AB 8.4 9.4 1.4'' 74° 2017 Lib 14h31m19.74s -15°38'19.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Well split, 0.5 delta mag, ~1.5”.
HJ2728, rho Boo 3.6 11.5 33.8'' 343° 2017 Boo 14h31m49.86s +30°22'16.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide blue faint B to bright orange A. PA to west, 4-5 delta mag.
HU140 9.5 10.1 1.4'' 196° 2016 Lib 14h32m32.68s -13°00'14.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Seeing not quite good enough, need more darkness, and it’s near Jupiter. I can see an elongated smear, averted vision brightens but does not split.
STF1858 AB 8.1 9.0 3.0'' 37° 2018 Boo 14h33m36.45s +35°35'08.00"
Rene Merting
Drachhausen (Germany)
100mm (142x) bei 64x ein extrem dicht stehendes Pärchen, Trennung fast greifbar - bei 142x stehen die Sterne noch immer sehr eng, die Trennung ist nun aber eindeutig - Komponente B im Nordosten ist etwas schwächer - beide Sterne leicht gelblich, hin und wieder mit Farbkontrast in Richtung orange
Uwe Pilz
Leipzig (Germany)
105mm (288x) nicht getrennt
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal orange 3-4"
STF1858 AC 8.1 14.3 16.2'' 274° 2015 Boo 14h33m36.45s +35°35'08.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 13th magnitude, a wide pair? Seen with averted vision, comes and goes with seeing
STT582, sig Boo AB 4.5 10.7 215.3'' 85° 2012 Boo 14h34m40.81s +29°44'42.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very wide blue to east?
STF1863 7.7 7.8 0.6'' 59° 2018 Boo 14h38m00.71s +51°34'42.10"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) gerade trennbar ../projects/doublestars/frederik_wanink/sketches/STF1863.jpg
STF1864, pi 1 Boo AB 4.9 5.8 5.5'' 113° 2018 Boo 14h40m43.56s +16°25'05.90"
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 32x eine 8, bei 64x dann knappe Trennung des Doppelsterns - Komponente B östlich ist nur leicht schwächer und erscheint mit einem zarten Stich ins Gelbe
Berthold Fuchs
Wiesbaden (Germany)
130mm close DS ../projects/doublestars/berthold_fuchs/photographs/pi Bootis.png
STF1867 8.4 8.8 0.7'' 355° 2017 Boo 14h40m44.21s +31°17'23.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 0.5 delta mag, hair to figure 8 split, white.
★★★ zeta Boo STF1865 AB 4.5 4.5 0.3'' 283° 2018 Boo 14h41m08.92s +13°43'42.00"
H6 104 AB-C 4.5 11.0 103.8'' 259° 2001
Uwe Pilz
Leipzig (Germany)
105mm (88x) AB-C ../projects/doublestars/uwe_pilz/sketches/zetaBoo.jpg
STF1878, DL Dra 6.3 9.2 4.1'' 315° 2015 Dra 14h42m03.25s +61°15'42.90"
Uwe Pilz
Leipzig (Germany)
105mm (198x) starke Aufhellung im ersten Ring ../projects/doublestars/uwe_pilz/sketches/stf1878.jpg
A1109 AB 7.4 9.4 1.9'' 88° 2017 Vir 14h42m47.60s +06°35'26.40"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Both stars light yellow, big magnitude difference, ~3-4 delta mag, about 2". Not difficult
STF1870 7.5 10.0 4.8'' 229° 2015 Boo 14h42m55.10s +08°04'34.30"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Yellow A and very much fainter B, wide ~5"? 4 delta mag. B flashes to view with seeing
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and fairly faint blue B, ~5-6", 3 delta mag.
STF1873 8.0 8.3 6.9'' 94° 2017 Boo 14h44m48.13s +07°42'04.00"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Light orange and light blue, wide.
STF1877, epsilon Boo, Izar AB 2.6 4.8 2.9'' 344° 2018 Boo 14h44m59.14s +27°04'29.90"
Robert Zebahl
Leipzig (Germany)
55mm (125x) The fainter component was seen as permanent brightening on the first diffraction ring of the primary component.
Robert Zebahl
Leipzig (Germany)
60mm (192x) Easy to split, whereby the much fainter component lies on the first diffraction ring of the primary component. The primary component itself appeared slightly yellowish. ../projects/doublestars/robert_zebahl/sketches/2018-04-10_eps_boo.jpg
Robert Zebahl
Leipzig (Germany)
70mm (133x) Easy to split, very unequal. A appeared in pale orange, B was visible as a very tiny, gray star on the first diffraction ring of component A.
Rene Merting
Drachhausen (Germany)
100mm (142x) bei 107x erscheint die B-Komponente nordwestlich leicht angesetzt an der gelblich strahlenden Komponente A - bei 142x dann ist die Trennung komplett, B liegt schön auf einem abgesetzten Beugungskranz von Komponente A
Stefan Loibl
Rosenheim (Germany)
102mm (205x) nice contrast yellow-orange/blue
Robert Zebahl
Leipzig (Germany)
120mm (192x) At 85x the fainter component was easily visible but not separated. At 192x well split. The fainter component was almost on the first diffraction ring of the primary component. Quite big difference in brightness. I did not looked at the color of the components.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) deutl. Farbkontrast blau gelb ../projects/doublestars/frederik_wanink/sketches/Izar.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Izar: Yellow-orange and blue, very pretty, as always
Berthold Fuchs
Wiesbaden (Germany)
130mm magnificent DS ../projects/doublestars/berthold_fuchs/photographs/eps Bootis.png
★★ HLD20, 5 Lib 6.5 10.1 4.7'' 249° 2001 Lib 14h45m57.78s -15°27'34.40"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Seeing distorts the A star into messy diffraction, but can see a much fainter orange star, seen as a point, outside the diffraction, 5-6", very fine!
Mark McCarthy
Fremont (California/USA)
508mm (333x) 8" 205x Orange star but no companion. 20" 333x Seeing distorted but a much fainter orange star seen as a point outside the diffraction, 5-6", Very fine! Put 8" mask back on @ 333x and can't see the B star!
STF1879 AB 7.8 8.4 1.7'' 82° 2018 Boo 14h46m15.58s +09°38'48.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Fairly close yellow and orange-yellow, ~1 delta mag, ~3"
STF1881 6.7 8.8 3.5'' 2017 Vir 14h47m05.35s +00°58'15.20"
Uwe Pilz
Leipzig (Germany)
70mm (198x) sehr schwierig, einfach mit 105mm ../projects/doublestars/uwe_pilz/sketches/stf1881.jpg
Mark McCarthy
Fremont (California/USA)
203mm (205x) Blue-white and 3-4 delta mag fainter B star, dull blue color. Well separated.
STF1884 6.6 7.5 2.2'' 56° 2018 Boo 14h48m23.37s +24°22'01.00"
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 64x ist der Doppelstern als 8 erkennbar, 107x reicht dann für die knappe Trennung - die B-Komponente im Nordosten ist nur unwesentlich schwächer - ein sehenswertes Pärchen
Robert Zebahl
Leipzig (Germany)
102mm (86x) At 86x pretty tight and unequal. At 160x clearly split. A: white, B: slightly orange.
Mark McCarthy
Fremont (California/USA)
203mm (333x) White, fairly close ~3", half delta mag.
Mark McCarthy
Fremont (California/USA)
203mm (333x) White, fairly close ~3", half delta mag.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) einfach ../projects/doublestars/frederik_wanink/sketches/STF1884.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange-white, 3 delta mag, ~5"
BU346 7.5 7.9 2.7'' 277° 2017 Lib 14h48m31.71s -17°20'24.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Easy, well split, yellow-orange stars, half delta mag.
STF1883 7.0 8.9 1.0'' 278° 2015 Vir 14h48m53.22s +05°57'15.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Strongly suspect a split / elongation in 80mm finder. In the scope it is a tight 2 delta mag orangish-white pair, ~1"
BU106, mu Lib AB 5.6 6.6 2.0'' 2016 Lib 14h49m19.09s -14°08'56.30"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Close, 1.5-2", half to one delta mag, off-white stars
Mark McCarthy
Fremont (California/USA)
203mm (333x) Close, 1.5-2", half to one delta mag, off-white stars.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt, schwierig wegen Südlage ../projects/doublestars/frederik_wanink/sketches/MuLib.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) Mu Lib: Easy, white & off white, 1 delta mag, ~3"
STF1890, 39 Boo 6.3 6.7 2.6'' 46° 2018 Boo 14h49m41.37s +48°43'15.60"
Robert Zebahl
Leipzig (Germany)
70mm (67x) At 44x elongated, partly with constriction. At 67x split, but very tight. A difference in brightness was not seen. At 133x clearly separated with little difference in brightness. A appeared pale yellow, B rather warm-white.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) gleich hell ../projects/doublestars/frederik_wanink/sketches/39Boo.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright white pair, well split
STF1886 AB 7.6 9.7 7.8'' 226° 2017 Boo 14h51m02.31s +09°43'25.20"
Robert Zebahl
Leipzig (Germany)
102mm (28x) At 28x, the B-component appeared rather faint and pretty close to the primary component. At 62x both components were clearly visible and unequal. A: slightly orange, B: grayish.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow-orange and orange, pretty wide ~10" 2 delta mag
Berthold Fuchs
Wiesbaden (Germany)
130mm close DS ../projects/doublestars/berthold_fuchs/photographs/STF 1886.jpg
STF1888, xi Boo AB 4.8 7.0 5.4'' 301° 2017 Boo 14h51m23.38s +19°06'01.70"
Mark McCarthy
Fremont (California/USA)
203mm (205x) A star a very pretty light yellow with 2 delta mag. light orange B star, ~5" separation
Mark McCarthy
Fremont (California/USA)
203mm (205x) A star a very pretty light yellow with 2 delta mag. light orange B, ~5".
Mark McCarthy
Fremont (California/USA)
317mm (277x) Xi Boo Pretty yellow & orange pair, 2 delta mag, ~8".
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty. Yellow and orange pair, ~6", 3 delta mag.
STT287 8.4 8.6 0.6'' 2018 Boo 14h51m27.53s +44°55'42.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wow! Hair-split, ~0.7", near equal to half a delta mag.
HO389 7.0 10.5 1.6'' 88° 2010 Boo 14h52m07.44s +20°17'26.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Definite split of much fainter pair, ~1.5", somewhat lost in diffraction, but there!
STT288 6.9 7.5 1.0'' 157° 2018 Boo 14h53m23.35s +15°42'18.30"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) rel. einfach ../projects/doublestars/frederik_wanink/sketches/STT288.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Notched / figure 8 with 277x, split with 553x.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Needed 553x to separate, resolved with the seeing. Near equal yellow-white, ~1" or less.
STT289 6.2 11.1 4.8'' 109° 2017 Boo 14h55m58.63s +32°18'00.30"
Mark McCarthy
Fremont (California/USA)
203mm (205x) With 8" 205x I noticed a very much fainter star emerge with averted vision then could hold direct, very fine, well split. At 8" 410x, I tried to bring out the B star with higher magnification, but oddly it disappeared. At 20" 410x, the B star easily seen though the disks are bloated, seeing not good
Mark McCarthy
Fremont (California/USA)
203mm (205x) 8" 205x Noticed a very much fainter star emerge with averted vision then could hold direct. Very fine, well split. 8" 410x Tried to bring out the B star with higher magnification, but oddly it disappeared. 20" 410x B star easily seen though the disks are bloated, seeing not good.
STF1895 8.3 8.9 12.7'' 42° 2017 Boo 14h57m27.87s +40°09'42.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint 1 delta mag pair, wide separation.
H6 51, 1 Ser AB 5.6 10.4 86.4'' 224° 2012 Vir 14h57m33.25s -00°10'03.40"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Orange in finder scope. In main scope a wide separation blue B, 3 delta mag
STT291, BX Boo 6.3 9.6 35.9'' 170° 2015 Boo 15h00m38.72s +47°16'38.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty wide, 2 delta mag, white.
STF1899 6.7 10.2 28.3'' 67° 2015 Lib 15h01m35.34s -03°09'50.50"
Mark McCarthy
Fremont (California/USA)
203mm (333x) White with very much fainter wide blue B
Mark McCarthy
Fremont (California/USA)
203mm (333x) White with very much fainter wide blue B.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Light orange and faint (on edge of visibility) blue star, wide separation
BU348 AB 6.1 7.5 0.5'' 108° 2007 Vir 15h01m48.92s -00°08'24.90"
Mark McCarthy
Fremont (California/USA)
203mm (447x) At 333x, suspect elongation. At 667x, definite elongation. 447x was the best/cleanest view, clearly elongated. With 20" 667x & 447x, the view is too messy
Mark McCarthy
Fremont (California/USA)
203mm (447x) 8" 333x Suspect elongation. 8" 667x Definite elongation. 8" 447x, best/cleanest view, clearly elongated.
Mark McCarthy
Fremont (California/USA)
203mm (667x) Seems out of round at 333x and 677x, seeing too poor for 20". Marginal
STF1909, 44 Boo 5.2 6.1 0.4'' 84° 2018 Boo 15h03m47.30s +47°39'14.60"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) 2015 getrennt zu sehen (1") ../projects/doublestars/frederik_wanink/sketches/44Boo.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) I Boo. Figure 8 to hair split, ~0.9". This pair shrinking separation fast, will be <0.5" in a couple of years. Only 40 LY away. (July 2017)
BU119 AB 8.1 8.8 2.3'' 275° 2017 Lib 15h05m31.91s -07°00'48.80"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Tried 667x at first but it was too much power, too dim and seeing too choppy. 333x was perfect, clean and well split ~2" near equal, slightly orange
Mark McCarthy
Fremont (California/USA)
203mm (333x) 8" 667x Too much power, too dim and seeing too choppy. 8" 333x perfect, clean and well split ~2" near equal, slightly orange.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very like BU 346. well split near half delta mag yellow stars, 2.5”
ENG52, 45 Boo AB 5.0 11.5 103.5'' 40° 2012 Boo 15h07m18.06s +24°52'09.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright white-yellow A, very faint 4-5 delta mag B, bluish, very wide separation.
STF1910 7.3 7.5 3.9'' 212° 2018 Boo 15h07m32.95s +09°13'33.80"
Berthold Fuchs
Wiesbaden (Germany)
130mm close DS ../projects/doublestars/berthold_fuchs/photographs/STF 1910.jpg
HJ2766 5.8 12.2 57.6'' 331° 2016 Boo 15h08m35.56s +25°06'31.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange-yellow A with very wide, very faint B, ~ 4 delta mag.
STF3090 AB 9.1 9.3 0.6'' 287° 2017 Vir 15h08m42.97s -00°58'50.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Notched to hairline split at the best moments. Faint pair, tough. Seeing not good enough to go above 553x.
BU349 7.6 10.9 3.3'' 38° 2015 Vir 15h08m57.33s +01°41'21.40"
Mark McCarthy
Fremont (California/USA)
508mm (333x) B star easily seen despite diffraction. Can only see with 8" 333x after first having seen it in the 20", and even then need averted vision to bring it out
Mark McCarthy
Fremont (California/USA)
508mm (333x) 20" 333x, B star easily seen despite diffraction. Can only see with 8" @ 333x after first having seen it in the 20", and even then need averted vision to bring it out.
STF1916 8.4 10.6 9.8'' 331° 2015 Boo 15h09m54.15s +38°58'33.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and reddish B, 1.5 delta mag, 8-10"
STF1921 8.6 8.7 30.3'' 283° 2017 Boo 15h12m00.00s +38°40'12.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very wide white pair, 1 delta mag, easy!
STF1919 6.7 7.4 23.2'' 11° 2018 Ser 15h12m43.48s +19°17'09.80"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Pretty wide separated stars, both white with a tint of yellow. Half delta mag.
Mark McCarthy
Fremont (California/USA)
203mm (205x) Pretty wide separated stars, both white with a tint of yellow. Half delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very wide yellow and orange-yellow. In an arc of three stars, with nice orange carbon star at the other end.
ES2648 AB 7.3 11.2 26.3'' 341° 2015 Boo 15h12m43.76s +48°34'50.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange with very faint bluish star, 3-4 delta mag., ~0.8"
H5 125 8.4 9.5 32.2'' 228° 2017 Boo 15h12m47.74s +27°55'35.60"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 20x zeigen sich zwei schwache Sternchen weit getrennt - Komponente B nicht signifikant schwächer - Farbkontrast zwischen beiden Sternen erkennbar, B mitunter bei 32x mit kupfernem Glanz
STT292 6.2 9.4 117.6'' 158° 2017 Boo 15h14m06.04s +31°47'16.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange star with two possible wide pairs, just pick one of the stars and that's B!]
STFA27, 49 Boo AB 3.6 7.9 105.0'' 78° 2017 Boo 15h15m30.16s +33°18'53.40"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Split in 80mm finder. Very wide pair, very bright A, 3 delta mag B. Orange-yellow and blue-white B
Mark McCarthy
Fremont (California/USA)
203mm (205x) Bright star with many nearby faint stars. Didn't bother trying to figure out which are which.
STF3091 AB-E 7.3 12.0 41.3'' 46° 2015 Ser 15h16m01.56s -04°53'52.30"
Mark McCarthy
Fremont (California/USA)
203mm (333x) White with very much fainter wide blue B
Mark McCarthy
Fremont (California/USA)
203mm (333x) White with very much fainter wide blue B. (AB-E seen, missed AB 0.5")
STF1932 AB 7.3 7.4 1.6'' 267° 2018 CrB 15h18m20.19s +26°50'24.70"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Near equal, yellowish white, ~2"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Near equal, yellowish white, ~2"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) gleich hell, getrennt ../projects/doublestars/frederik_wanink/sketches/STF1932.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal yellow-white, very close but clean split, ~1.5". Nice!
★★ STF1930, 5 Ser AB 5.1 10.1 11.1'' 36° 2017 Ser 15h19m18.79s +01°45'55.50"
Stefan Loibl
Rosenheim (Germany)
102mm (68x) Messier 5 in the same FOV, wonderful
Mark McCarthy
Fremont (California/USA)
203mm (333x) Light yellow bright A, very much fainter orangish B, wide separation. Near M5.
STF1935 9.9 10.2 8.6'' 289° 2015 CrB 15h20m13.27s +30°41'44.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint wide pair, 1 delta mag.
BU32, 6 Ser AB 5.5 8.8 3.4'' 22° 2008 Ser 15h21m02.00s +00°42'55.20"
Robert Zebahl
Leipzig (Germany)
102mm (224x) Not split. Tried at 224x and 280x. Companion probably too faint. I had sidewalk lighting in the immediate vicinity.
Uwe Pilz
Leipzig (Germany)
105mm (288x) Der Begleiter ist sehr schwach. Auch mit 90 mm Blende noch gesehen ../projects/doublestars/uwe_pilz/sketches/190628_6Ser.jpg
Mark McCarthy
Fremont (California/USA)
203mm (333x) Light yellow A and very much fainter B, wide separation.
STF1936 9.9 10.1 19.8'' 231° 2015 CrB 15h21m07.63s +27°02'23.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty faint near equal wide white pair through finder. In scope one star splits into a close double
HJ2777 7.4 12.1 42.6'' 342° 2015 CrB 15h22m25.32s +25°37'27.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) UV CrB: Light orange with very faint blue B, very wide 3 delta mag.
STF1937, eta CrB AB 5.6 6.0 0.6'' 231° 2017 CrB 15h23m12.23s +30°17'17.70"
Mark McCarthy
Fremont (California/USA)
203mm (667x) 8" @ 333x, Suspect elongation. 8" 667x definite egg shape. 20" 667x: Can't get a good focus
Mark McCarthy
Fremont (California/USA)
203mm (667x) 8" 333x Suspect elongation. 8" 667x definite egg shape. 20" 667x Can't get a good focus.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) deutlich als 8 zu sehen, 2015 0,6" ../projects/doublestars/frederik_wanink/sketches/EtaCrB.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) Close orange pair, equal mag, snowman shape
Mark McCarthy
Fremont (California/USA)
317mm (553x) Overlapping / notched orange-yellow stars. Used apodising mask.
★★ mu Boo STFA28, mu 1 Boo, 51 Boo AB 4.3 7.1 108.2'' 171° 2017 Boo 15h24m29.54s +37°22'37.10"
STF1938, mu 2 Boo Ba-Bb 7.1 7.6 2.2'' 2017
Robert Zebahl
Leipzig (Germany)
8x40 STFA28 (AB): Easily split with obvious difference in brightness.
Rene Merting
Drachhausen (Germany)
16x70 STFA28 (AB): weit getrenntes Pärchen, aufgrund der großen Helligkeitsunterschiedes schöner Farbkontrast - Komponente A im Norden gelblich, B im Süden mehr grau-braun
Robert Zebahl
Leipzig (Germany)
70mm (22x) STFA28 (AB): Evident, very wide apart and unequal. A: white-yellowish, B: gray.
Robert Zebahl
Leipzig (Germany)
102mm (125x) STF1938 (Ba-Bb): Beautiful view! This triple system includes STFA 28 and STF 1938. ../projects/doublestars/robert_zebahl/sketches/2019-04-04_mu_boo.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) ein heller 4m und zwei nahe dunkle 7m, lohnend.
Robert Zebahl
Leipzig (Germany)
120mm (23x) STFA28 (AB): Easy to split with large angular distance and noticeable difference in brightness.
Mark McCarthy
Fremont (California/USA)
203mm (205x) STFA28 (AB): Bright A star does not seem round. The B star is a tight equal pair, pretty set. [Aa,Ab is CHR 181 0.1", and I'd be shocked if I actually detected it. STFA 28 is technically the bright star and the tight pair, the tight pair is Ba,Bb = STF 1938, 7.09/7.63, 2.2"]
Mark McCarthy
Fremont (California/USA)
203mm (205x) STFA28 (AB): Bright A star does not seem round (CHR181). B star is a tight equal pair (STF1938 Ba-Bb). Pretty set. STFA 28 is technically the bright star and the tight pair
Mark McCarthy
Fremont (California/USA)
203mm (205x) STF1938 (Ba-Bb): Bright A star does not seem round (CHR181). B star is a tight equal pair (STF1938 Ba-Bb). Pretty set. STFA 28 is technically the bright star and the tight pair
Frederik Wanink
Itterbeck (Germany)
254mm (640x) STF1938 (Ba-Bb): 3er System, schön ../projects/doublestars/frederik_wanink/sketches/STF1938.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) STF1938 (Ba-Bb): Tight 3 detla mag pair, fainter than the bright white A star Mu Boo.
Mark McCarthy
Fremont (California/USA)
317mm (277x) STFA28 (AB): Bright white star with tight yellow pair STF 1938 as its companion.
Mark McCarthy
Fremont (California/USA)
317mm (553x) STFA28 (AB): Striking. Bright star with near equal double STF 1938 paired with it. A star is a spectroscopic binary
Mark McCarthy
Fremont (California/USA)
317mm (553x) STF1938 (Ba-Bb): Near equal close but well split double also paired with STFA28
CHR181, mu 1 Boo Aa-Ab 4.3 0.1'' 188° 2012 Boo 15h24m29.54s +37°22'37.10"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Bright A star does not seem round (CHR181). B star is a tight equal pair (STF1938 Ba-Bb). Pretty set. STFA 28 is technically the bright star and the tight pair
HU149 7.5 7.6 0.7'' 272° 2017 Dra 15h24m35.30s +54°12'46.10"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) mit Zwischenraum zu sehen ../projects/doublestars/frederik_wanink/sketches/HU149.jpg
★★ STF1941 9.7 9.8 1.4'' 212° 2017 CrB 15h25m42.81s +26°37'40.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint, very close equal pair, ~1.5". Nice!
★★ STT296 AB 7.8 9.1 2.2'' 274° 2016 Boo 15h26m26.56s +44°00'13.20"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Very fine but well split, ~2", yellow-white A, reddish B, 2 delta mag.
Mark McCarthy
Fremont (California/USA)
203mm (205x) Very fine but well split, ~2", yellow-white A, reddish B, 2 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very beautiful, 2", 2 delta mag, with very faint third (AC) seen with averted vision widely separated.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Close near equal, 1 delta mag, white.
STT296 AC 7.8 12.7 80.7'' 313° 2016 Boo 15h26m26.56s +44°00'13.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very beautiful, 2", 2 delta mag, with very faint third (AC) seen with averted vision widely separated.
KU108 AB 7.5 9.7 40.7'' 319° 2015 Boo 15h27m40.35s +42°52'52.90"
Mark McCarthy
Fremont (California/USA)
203mm (205x) White A and reddish B stars. Wide, 2 delta mag. [Need to try this with the 20": BC = RAO 18 9.74/11.00 0.4"]
Mark McCarthy
Fremont (California/USA)
203mm (205x) White A and reddish B stars. Wide, 2 delta mag. (Need to try this with the 20": BC = RAO 18 9.74/11.00 0.4")
JEF1, bet CrB 3.7 5.2 0.1'' 327° 2012 CrB 15h27m49.85s +29°06'19.80"
Mark McCarthy
Fremont (California/USA)
762mm (457x) Suspect out of roundness in the star disk. Tried with and without a hexagon mask.
★★ STF1950 8.1 9.2 3.4'' 93° 2017 Ser 15h29m58.46s +25°30'31.10"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Dull orange A star, 1.5 delta mag to B, B star ~4", a flatter orange color
Mark McCarthy
Fremont (California/USA)
203mm (333x) Dull orange A, 1.5 delta mag, B ~4", a flatter orange color.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Very fine orange pair 2 delta mag, ~1.5”. B appears fine and d