Double Stars - Recommendations

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

Double star lists:
Double/Multiple Stars 349
Visual Observations 803
Sketches 140
Photographs 12
Observers 10
Berthold Fuchs, Christopher Hay, Jens Leich, Stefan Loibl, Mark McCarthy, Rene Merting, Uwe Pilz, 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
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 ../projects/doublestars/uwe_pilz/sketches/STF2.jpg
Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt ../projects/doublestars/frederik_wanink/sketches/STF2.jpg
STF12, 35 Psc 6.1 7.5 11.5'' 148° 2018 Psc 00h14m58.84s +08°49'15.50"
Robert Zebahl
Leipzig (Germany)
70mm (22x) At 22x pretty bright but uneven pair with relatively close components. At 44x the brighter component looked slightly yellowish, the fainter one slightly blueish. The double star could be observed together with STF22 (38 Psc) in the same field of view and stands in nice contrast to it.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and white, ~1 delta mag, PA to S.
★★ HJ1947 AB 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
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, 38 Psc AB-C 7.1 7.7 4.0'' 235° 2016 Psc 00h17m24.50s +08°52'34.80"
AB-D 7.1 11.5 66.8'' 151° 2005
Robert Zebahl
Leipzig (Germany)
70mm (44x) AB-C: At 44x separated with almost touching diffraction disks and small difference in brightness. At 57x clearly separated, but still quite close together. It stands in beautiful contrast to the nearby double star STF12 (35 Psc).
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB-C: near equal white pair, well split, B ~1/2 delta mag, PA to SW.
ES41 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.
★★ 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
AC1 7.3 8.3 1.9'' 290° 2018 And 00h20m54.10s +32°58'40.90"
Robert Zebahl
Leipzig (Germany)
102mm (125x) Very attractive, relatively close with a clearly visible difference in brightness. In the immediate vicinity a brighter star shines in a lovely orange. Very nice contrast! ../projects/doublestars/robert_zebahl/sketches/2019-10-22_ac1.jpg
Uwe Pilz
Leipzig (Germany)
105mm (200x) orange. Leuchtend gelber Stern in 5' Abstand ../projects/doublestars/uwe_pilz/sketches/191122AC1.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Tight yellow-white pair, near equal magnitudes.
Mark McCarthy
Fremont (California/USA)
508mm (205x) Orange star, slightly out of round.
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.
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.
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".
★★★ 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".
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 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
STF73, 36 And AB 6.1 6.5 1.1'' 334° 2018 And 00h54m58.02s +23°37'42.40"
Robert Zebahl
Leipzig (Germany)
102mm (125x) Clearly visible as figure '8' with a rather small difference in brightness.
Uwe Pilz
Leipzig (Germany)
105mm (198x) ganz einfach
Robert Zebahl
Leipzig (Germany)
152mm (300x) Split with little gap in between and little difference in brightness. Seeing was not really good.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) hell ../projects/doublestars/frederik_wanink/sketches/36And.jpg
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.
★★ STF88, psi 1 Psc AB 5.3 5.5 29.7'' 160° 2018 Psc 01h05m40.93s +21°28'23.60"
Christopher Hay
Seeheim (Germany)
18x80 Psi1 Psc is well separated. Very strong visual presence in this instrument. Components almost identically bright, colourless. Strongly supplemented to the south in 4° field of view by Psi2, Psi3 and Chi. Field relatively empty to the north, which gives the field further tension. According to Stelledoppie a true physical double 275 light years distant.
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.
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"
Christopher Hay
Seeheim (Germany)
15x45 Cleanly split. Western component distinctly brighter, no colour impression.
Robert Zebahl
Leipzig (Germany)
200mm (37x) Visually evident as double star and easy to find. Well split with slight difference in brightness.
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
Rene Merting
Drachhausen (Germany)
4mm (20x) bei 32x ein schönes helles Sternpaar, weit getrennt - auffälliger Farbkontrast, A ist reinweiß, B eher schmutzig orange-braun - zurück auf 20x ist die Trennung noch immer sehr deutlich
STF115 AB 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
STTA17, BKO10 STTA17 AB 8.0 9.8 35.4'' 101° 2015 And 01h24m30.85s +39°01'30.30"
STTA17 AC 8.0 8.5 134.9'' 347° 2014
STTA17 CD 8.5 9.8 68.9'' 279° 2015
STTA17 CE 8.5 13.3 81.2'' 14° 2015
BKO10 AF 8.0 11.2 141.7'' 270° 2015
Christopher Hay
Seeheim (Germany)
18x80 The group of stars strikes the eye while sweeping from Mirach to Tau/Upsilon TRI. First thought I'd found an open cluster. Two pairs with practically opposite PAs. Southern pair AB much closer than northern CD, but brightnesses within the pairs very similar. A nice double-double.
Robert Zebahl
Leipzig (Germany)
152mm (22x) The components A-D and F easily visible as a rather conspicuous group with comparatively large distances. I didn't pay attention to the component E. No brighter stars in the immediate vicinity. The pair AB and CD are very similar; CD a bit wider with opposite position angle. Very nice multiple star also for smaller telescopes.
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
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x stehen beide Komponenten weit auseinander - Komponente B im Osten ist gut 1.5 Größenklassen schwächer als A - Farbkontrast rein weiß (A) vs. orange-braun (B) - südöstlich von A in 4-facher Entfernung AB steht ein weiterer schwacher Stern (Komponente C mit 10.29 mag/ AC mit eigener Bezeichnung: DOB 2) - zurück auf 20x bilden A und B ein schönes enges Paar, Komponente C ist auch noch knapp erkennbar
Mark McCarthy
Fremont (California/USA)
317mm (340x) Pretty yellow-white and red-orange pair, wide, 1.5-2 delta mag. Nearby X Cas a very pretty red.
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.
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.
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!
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"
★★★ STF227, iota Tri, 6 Tri 5.3 6.7 3.7'' 69° 2016 Tri 02h12m22.28s +30°18'11.10"
Robert Zebahl
Leipzig (Germany)
70mm (57x) At 44x even separable with a clear difference in brightness, whereby the companion is almost outshone by the primary component. At 57x easy to separate. Primary component shines in bright orange, companion slightly orange. Beautiful sight together with STF232 in one field of view! ../projects/doublestars/robert_zebahl/sketches/2019-12-12_6_tri_stf232.jpg
Uwe Pilz
Leipzig (Germany)
105mm (88x) weiß und blau ../projects/doublestars/uwe_pilz/sketches/191230stf227.jpg
Frederik Wanink
Itterbeck (Germany)
254mm (200x) Helligkeitsunterschied deutlich
★★★ STF231, 66 Cet AB 5.7 7.7 16.8'' 235° 2018 Cet 02h12m47.54s -02°23'37.10"
Uwe Pilz
Leipzig (Germany)
105mm (88x) weiß und leuchtend rot! ../projects/doublestars/uwe_pilz/sketches/191129_66Cet.jpg
★★ STF232 7.8 7.9 6.5'' 66° 2016 Tri 02h14m42.16s +30°23'41.20"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Very beautiful view! With all used magnifications together with iota Tri (6 Tri) in one field of view. Separable at 22x, but the components are still quite close together and appear similarly bright. At 44x easy to separate with little difference in brightness. At 57x a very small color difference is visible without being able to clearly name the colors. STF232 was sketched together with 6 Tri.
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.
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
Rene Merting
Drachhausen (Germany)
100mm (32x) AD: bei 32x extrem weiter Abstand zwischen A und D, Helligkeitsunterschied mehr als 2 Größenklassen (laut Stelle Doppie sogar 3.85 mag)
Rene Merting
Drachhausen (Germany)
100mm (64x) AC: bei 64x getrennt, schöner Farbkontrast, Komponente A ist weiß mit einem Stich ins Gelbe, C leicht bräunlich
Rene Merting
Drachhausen (Germany)
100mm (142x) AB: bei 142x zeigt sich Komponente B im Südwesten mit gut einem Drittel das Abstandes AC, Helligkeitsunterschied 1,5 bis 2 Größenklassen
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!
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
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein leichter Fang, gut getrenntes Pärchen - Komponente B im Nordwesten ist zwar sehr schwach, aber direkt immer noch gut erkennbar - Helligkeitsunterschied 3 Größenklassen - Komponente A strahlend weiß, B eher grau, wenn überhaupt als Farbe erkennbar
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice orange star with wide B
Mark McCarthy
Fremont (California/USA)
317mm (553x) Tighter, 1 D-mag, white A reddish B.
★★ 30 Ari STFA5 AB 6.5 7.0 37.9'' 275° 2018 Ari 02h37m00.52s +24°38'50.00"
RAO8 BC 7.0 11.0 0.6'' 283° 2015
Robert Zebahl
Leipzig (Germany)
70mm (22x) AB: At 22x widely separated, striking with a rather small difference in brightness. A seemed a bit warmer in color compared to B with a hint of orange. At 44x, both seemed slightly orange with very little difference in color.
Uwe Pilz
Leipzig (Germany)
105mm (88x) AB: trennbar bei 22x. Weiß und blau ../projects/doublestars/uwe_pilz/sketches/191230_30Ari.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB: Near equal light orange, very wide. B has a C pair 0.6" and 4 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Near equal magnitude, wide separated, PA to WSW
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!
STF291 AB 7.7 7.5 3.4'' 118° 2017 Ari 02h41m06.59s +18°48'00.70"
AC 7.7 9.5 65.5'' 242° 2015
Robert Zebahl
Leipzig (Germany)
70mm (57x) AB: At 44x almost, at 57x clearly split, but still very tight with rather small difference in brightness.
Uwe Pilz
Leipzig (Germany)
105mm (88x) hellster Stern gelb, andere Farben nicht erkennbar ../projects/doublestars/uwe_pilz/sketches/191230stf291.jpg
★★ STT44 AB 8.5 9.0 1.4'' 55° 2016 Per 02h42m13.13s +42°41'57.20"
AC 8.5 8.3 87.2'' 290° 2017
Uwe Pilz
Leipzig (Germany)
105mm (200x) AB: schwierig
Robert Zebahl
Leipzig (Germany)
152mm (129x) AB: At 129x barely separable, at 150x separated quite clearly with a noticeable difference in brightness. The double star is located within Messier 34!
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: In M34 open cluster! Close near equal pair, 1.5", very nice! The cluster is pretty, loose, and jangly with stars of varying magnitudes. What a treat.
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.
★★ 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
Rene Merting
Drachhausen (Germany)
100mm (32x) STF307 (AB): bei 32x sehr ansehnlich - Komponente B steht gut getrennt nordwestlich vom signal-gelben Eta Persei - Helligkeitsunterschied sehr groß, nicht abschätzbar
Uwe Pilz
Leipzig (Germany)
105mm (88x) Dreifachsystem, nahe Komponente: PW und Abstand stimmt, is aber viel zu dunkel (10m statt 8m5). Ein Mysterium
Mark McCarthy
Fremont (California/USA)
317mm (553x) STF307 (AB): Orange with faint, bluish, widely separated B.
STF314 AB-C 7.0 7.3 1.6'' 316° 2018 Per 02h52m52.03s +52°59'50.60"
Robert Zebahl
Leipzig (Germany)
152mm (129x) Beautifully separated, quite close together. Difference in brightness visible, but rather small. Easy to find and bright. Very nice.
Frederik Wanink
Itterbeck (Germany)
254mm (460x) ähnlich hell ../projects/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
★★ 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.
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.
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.
BU533 AB 7.5 7.7 1.0'' 222° 2018 Per 03h35m37.81s +31°40'48.70"
Robert Zebahl
Leipzig (Germany)
152mm (225x) At 129x clearly elongated with constriction. At 225x just so separable with similarly bright components.
Mark McCarthy
Fremont (California/USA)
317mm (270x) Overlapping yellow-orange disks, equal mag
★★ BU535, omicron Per, 38 Per, Atik 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
Robert Zebahl
Leipzig (Germany)
152mm (300x) In steady moments the faint companion is clearly recognizable as a small brightening in the first diffraction ring of the primary component.
Mark McCarthy
Fremont (California/USA)
317mm (270x) No split at 270x
★★ 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
★★★ 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
STF494 7.5 7.7 5.2'' 187° 2016 Tau 04h08m53.50s +23°05'55.10"
Robert Zebahl
Leipzig (Germany)
102mm (62x) At 28x separated, but very tight, similarly bright, both whitish. At 62x easy to separate, little difference in brightness and color: slightly orange; white-blueish. Color impression slightly more intense at 86x.
Robert Zebahl
Leipzig (Germany)
152mm (49x) Easy to separate at 49x with subtle color differences: slightly orange; white-blueish. Color impression slightly more intense at 100x. Beautiful sight.
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.
★★ STF559 7.0 7.0 3.0'' 277° 2018 Tau 04h33m33.04s +18°01'00.20"
Robert Zebahl
Leipzig (Germany)
70mm (57x) Barely split with similarly bright components.
Robert Zebahl
Leipzig (Germany)
102mm (160x) Very nice view! Easy to separate, similarly bright at a nice distance from each other. The colors of the components changed over time: orange and subtle blue.
Uwe Pilz
Leipzig (Germany)
105mm (144x) trennbar mit 88x, westlicher Stern scheint etwas heller und gelb-orange, östlicher Stern orange ../projects/doublestars/uwe_pilz/sketches/200115stf559.jpg
Robert Zebahl
Leipzig (Germany)
152mm (69x) Beautiful sight, similar bright components, pretty tight.
★★ 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 (57x) Easy, still relatively tight with a large difference in brightness. Component A appeared pretty bright and white-yellowish, while B appeared only as a tiny star. Very nice sight.
Uwe Pilz
Leipzig (Germany)
105mm (88x) blau und weiß ../projects/doublestars/uwe_pilz/sketches/200111_omegaAur.jpg
Uwe Pilz
Leipzig (Germany)
105mm (144x) gelb. Schöner Helligkeitskontrast, dabei aber einfach. Auch bei 88x trennbar ../projects/doublestars/uwe_pilz/sketches/191216_4Aur.jpg
Mark McCarthy
Fremont (California/USA)
203mm (113x) Omega Aurigae. The A was a surprising sickly blue-green color, and the B was a tawny brown, nicely split 5" away.
★★ STF644 AB 7.0 6.8 1.6'' 223° 2018 Aur 05h10m18.81s +37°18'06.70"
Robert Zebahl
Leipzig (Germany)
70mm (100x) At 57x slightly elongated with a partially visible constriction. At 100x & 133x two clearly overlapping diffraction disks are visible as figure '8' with a small difference in brightness.
Robert Zebahl
Leipzig (Germany)
102mm (129x) Grand sight! Two almost touching diffraction disks, slight difference in brightness, both slightly yellowish.
Uwe Pilz
Leipzig (Germany)
105mm (200x) Beide Orange, mit schwarzem Zwischenraum. Lohnend ../projects/doublestars/uwe_pilz/sketches/200115stf644.jpg
Robert Zebahl
Leipzig (Germany)
152mm (129x) Great view, easy to separate, but still quite close together with low difference in brightness. Both components appeared slightly orange.
★★ 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
Uwe Pilz
Leipzig (Germany)
105mm (88x) AC: heller Stern gelblich weiß ../projects/doublestars/uwe_pilz/sketches/200111_14Aur.jpg
Mark McCarthy
Fremont (California/USA)
317mm (270x) AB: Triple, one of which is one delta mag fainter than the other equal pair. All well separated. [AC is the brighter pair, AB fainter.]
Mark McCarthy
Fremont (California/USA)
317mm (270x) AC: Triple, one of which is one delta mag fainter than the other equal pair. All well separated. [AC is the brighter pair, AB fainter.]
STF698 AB 6.7 8.3 31.3'' 348° 2018 Aur 05h25m12.94s +34°51'18.60"
Uwe Pilz
Leipzig (Germany)
105mm (88x) rot-orange und blaugrau, lohnend ../projects/doublestars/uwe_pilz/sketches/200111_stf698.jpg
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.
Robert Zebahl
Leipzig (Germany)
70mm (22x) Separated at 22x, but still a relatively tight pair with a moderate difference in brightness. Together with sigma Aur in one field of view. Overall rather dim double star. At 57x very nice view! A: pale orange, B: slightly blueish
Uwe Pilz
Leipzig (Germany)
105mm (88x) schwach, aber lohnend. Orange und blau ../projects/doublestars/uwe_pilz/sketches/191216stf699.jpg
Mark McCarthy
Fremont (California/USA)
317mm (270x) Wide yellow and blue-white, half delta mag.
STF730 AB 6.1 6.4 9.7'' 142° 2018 Tau 05h32m14.14s +17°03'29.30"
Robert Zebahl
Leipzig (Germany)
70mm (22x) At 22x beautiful sight, easy to separate with little difference in brightness. A appeared slightly yellowish. At 57x moderate, but still very nice color contrast: A yellowish, B rather white.
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)
102mm (62x) Beautifully separated, relatively tight with well visible difference in brightness. Points directly toward Messier 1 and can be observed with it in one field of view. Very nice!
Robert Zebahl
Leipzig (Germany)
120mm (48x) Nice, evident double near Messier 1. Easy to split with almost equally bright components.
Robert Zebahl
Leipzig (Germany)
152mm (69x) At 49x just so, at 69x easily separable. The fainter component appeared a little warmer in terms of color. Great view together with Messier 1 in the field of view.
Robert Zebahl
Leipzig (Germany)
200mm (80x) Nice double star with nearly equally bright components.
★★ 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
★★ 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.
★★ BU1053 6.9 8.8 1.7'' 2016 Aur 05h53m28.64s +37°20'20.70"
Robert Zebahl
Leipzig (Germany)
70mm (133x) Border observation! Companion is temporarily visible in the correct position angle as an extremely dim brightening of the first diffraction ring of the primary component.
Mark McCarthy
Fremont (California/USA)
317mm (270x) Nice!! Blazing white and close but nicely split light blue B, 2 delta mag.
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
★★ BU1008, eta Gem, 7 Gem, Propus 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
Robert Zebahl
Leipzig (Germany)
152mm (225x) Already comparatively easy at 180x. The faint companion can be seen well as a quite distinct, slightly elongated, partly round brightening. At 225x and above it becomes easy and immediately apparent, even if the diffraction rings of the primary component are not permanently visible due to the seeing. The primary component was shining in a bright orange.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Propus (means "forefoot") = Eta Geminorum: So cool! Bright orange star with B very close, ~1.5", just preceding, ~3 delta mag. B is in diffraction but is well separated & has its own airy disk, bluish white.
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
★★★ 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 ../projects/doublestars/uwe_pilz/sketches/betaMon.jpg
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
★★ STF924 AB 6.3 6.9 20.7'' 212° 2017 Gem 06h32m18.52s +17°47'03.40"
BC 6.9 13.0 47.8'' 144° 2014
Robert Zebahl
Leipzig (Germany)
70mm (22x) AB: At 22x bright, immediately conspicuous, although in a relatively star-rich surrounding. Moderate but beautiful color contrast: bright orange, decent blue. Also at 44x very beautiful sight.
Robert Zebahl
Leipzig (Germany)
152mm (69x) AB: Easy, bright, moderately uneven. Nice contrast in color: slight orange, white-blueish.
STT147 AB 6.8 8.7 42.7'' 74° 2016 Aur 06h34m19.37s +38°04'33.60"
A-CD 6.8 9.8 44.5'' 119° 2016
CD 10.6 11.0 0.5'' 109° 1957
Robert Zebahl
Leipzig (Germany)
152mm (69x) At 22x, the components A, B and C are immediately conspicuous, where A dominates. They form a beautiful, acute-angled triangle. At 69x, color differences are also visible. A: subtle orange; B: gray-blueish; C: tendency to orange. Rewarding, because the double stars STF 928 & STF 929 as well as the very conspicuous carbon star UU Aur are in close proximity and can partly be observed together in one field of view!
STF928 AB 7.9 8.6 3.5'' 132° 2016 Aur 06h34m41.81s +38°32'24.50"
Robert Zebahl
Leipzig (Germany)
152mm (69x) Clearly separated, but tight. Moderate difference in brightness. Nice view with the nearby double stars STT147 & STF 929 and the carbon star UU Aur!
STF929 7.3 8.4 6.5'' 24° 2016 Aur 06h35m22.03s +37°42'55.10"
Robert Zebahl
Leipzig (Germany)
152mm (69x) Easy to separate, clear difference in brightness, slight color contrast. Primary component showed a slight orange color, the color of the companion was not clearly defineable. Nice view with the nearby double stars STT147 & STF 928 and the carbon star UU Aur!
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.
★★★ 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
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.
STTA80 AB 7.2 7.4 124.1'' 53° 2015 Gem 06h58m06.59s +14°13'43.40"
AC 7.2 8.4 81.2'' 112° 2015
Robert Zebahl
Leipzig (Germany)
70mm (22x) All 3 components form a striking triangle and are slightly different in color. A (western component): white-blueish; B (northern component): white-yellowish; C (southern component): orange, partly slightly reddish. ../projects/doublestars/robert_zebahl/sketches/2019-12-18_stta80.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
STF1007 AB 7.4 11.4 14.6'' 300° 2015 Gem 07h00m37.12s +12°43'24.20"
AC 7.4 10.0 21.9'' 244° 2015
AD 7.4 7.7 67.7'' 28° 2016
Robert Zebahl
Leipzig (Germany)
70mm (22x) AD: Wide separation, small difference in brightness. Slight difference in color, but difficult to describe. Component A at least seemed rather white. South of STF1007 there is also the double star HJ3288 and the star HD52976, which appears in a bright orange. Together in one field of view a beautiful sight. ../projects/doublestars/robert_zebahl/sketches/2019-12-18_stf1007_hj3288.jpg
★★ 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.
HJ3288 7.3 8.7 38.5'' 247° 2015 Gem 07h02m18.43s +12°34'54.20"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Easy to separate with moderate angular distance and a significant difference in brightness. Slight difference in color: white-yellowish, slightly orange. Nice view together with the double star STF1007 and HD52976, which appears in a bright orange. Sketched together with STF1007.
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”
★★ 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.
★★ 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.
★★★ 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
★★ 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
★★★ 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.
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
★★ 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)
70mm (22x) Striking, widely separated with noticeable difference in brightness. Moderate but beautiful color contrast: white-yellowish and gray-blueish.
Robert Zebahl
Leipzig (Germany)
102mm (28x) Grand sight! Pretty wide apart and unequal. A: decent orange, B: very nice light blue.
Stefan Loibl
Rosenheim (Germany)
102mm (164x) wide pair with nice colour contrast yellow/blue
Uwe Pilz
Leipzig (Germany)
105mm (144x) gelb-blaugrau ../projects/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.
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
Robert Zebahl
Leipzig (Germany)
70mm (133x) AB: Immediately apparent as a double star. Diffraction disks overlapping slightly ('8'). Difference in brightness visible.
Uwe Pilz
Leipzig (Germany)
105mm (144x) gelb ../projects/doublestars/uwe_pilz/sketches/57Cnc.jpg
★★ 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.
STF1298, 66 Cnc AB 6.0 8.6 4.4'' 137° 2017 Cnc 09h01m24.13s +32°15'08.30"
AC 6.0 12.0 187.6'' 318° 2015
Robert Zebahl
Leipzig (Germany)
70mm (80x) AB: At 67x and 80x the companion is visible as a very faint star close to the main component. At 133x it is only visible as a slightly blurred tiny star just outside the first diffraction ring of the primary component.
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!
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
★★ 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.
★★ 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.
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.
★★ 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
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.
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.
★★ 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"
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")
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.
★★ 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.
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!
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!
★★ 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.
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.
★★ 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.
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
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!
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.
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!
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.
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.
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.
★★ 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
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
★★ 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
★★ 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
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.
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!
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!
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
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.
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.
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
★★★ 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
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
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!
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"
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.
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”
★★ 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.
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
★★ 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.
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 delicate.
Mark McCarthy
Fremont (California/USA)
317mm (340x) 72 Vir: Bright A and very faint B, widely separated.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty orange and pale orange, 2 delta mag, ~4"
COU610, the CrB 4.3 6.3 0.8'' 199° 2016 CrB 15h32m55.78s +31°21'32.90"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Notched/snowman at best moments. B definitely fainter and almost blue. looks like an appendage. 20" too messy. I tried this one in 2018 with a 30" scope and failed.
Mark McCarthy
Fremont (California/USA)
203mm (667x) Notched/snowman at best moments. B definitely fainter and almost blue. Very faintly split, looks like a blue appendage.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) nicht als DS gesehen
Mark McCarthy
Fremont (California/USA)
317mm (738x) Tried pretty hard at 553x with apodizing screen, but dances too much. Used 6mm ortho with barlow, 738x, and at best moment it is olive shaped, but marginal. Observation August 2018
Mark McCarthy
Fremont (California/USA)
762mm (915x) The CrB: Fractured and dancing seeing. 915x, at full aperture and with 8-inch aperture mask, I see a slight out of roundness.
STT298 AB 7.2 8.4 1.3'' 187° 2017 Boo 15h36m02.22s +39°48'08.90"
Mark McCarthy
Fremont (California/USA)
203mm (205x) At zenith, but worth the effort to slew to. Another great 2+1. The tight pair [AB] is near equal and split a little more than a hairline
Mark McCarthy
Fremont (California/USA)
203mm (205x) At zenith, but worth the effort to slew to. Another great 2+1. The tight pair (AB) is near equal and split a little more than a hairline split.
Mark McCarthy
Fremont (California/USA)
317mm (553x) One component of compicated 6 star system, some of which is split in 80mm finter. This is a close equal pair, ~2".
★★ STF1964 AC 8.1 8.1 14.5'' 90° 2017 CrB 15h38m12.91s +36°14'48.60"
CD 8.1 9.0 1.6'' 21° 2017
Rene Merting
Drachhausen (Germany)
100mm (20x) AC: bei 20x ein gut getrenntes Pärchen gleich heller Sterne, auffallend im Sternumfeld
Robert Zebahl
Leipzig (Germany)
102mm (62x) AC: Rather wide pair, equal without visible difference in color.
Uwe Pilz
Leipzig (Germany)
105mm (16x) Dreifachstern nicht trennbar
Robert Zebahl
Leipzig (Germany)
120mm (23x) AC: Nice double star, well split with equally bright components.
Mark McCarthy
Fremont (California/USA)
317mm (277x) AC: Well split equal pair. I suspect B is pair as it is an elongated orange smear at 277x -- it is STF 1964CD.
Mark McCarthy
Fremont (California/USA)
317mm (553x) CD: Split, light orange 1 delta mag pair
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint near equal pair about 3" separation. In the same field with HU 1167. Magnificent
★★ HU1167 AB 8.1 9.9 1.3'' 82° 2015 CrB 15h38m12.91s +36°14'48.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright star with much fainter pair, about 1" separation, 3-4 delta mag. In same field with STF 1964. Magnificent
STF1967, gam CrB 4.0 5.6 0.6'' 111° 2012 CrB 15h42m44.57s +26°17'44.30"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Definite mis-shape, oval to egg, observation made June 2019
Mark McCarthy
Fremont (California/USA)
203mm (667x) Gamma CrB. Definite mis-shape, oval to egg.
★★ STT301 7.5 10.4 4.0'' 27° 2017 Boo 15h46m13.64s +42°28'06.30"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Wide magnitude difference, ~4 delta mag. B is faint but well split, ~5"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Wide mag difference, ~4 delta mag. B is faint but well split, ~5".
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wow. Relatively bright A, orange, with a very faint B which shimmers and sparkles to view with averted vision and held with direct. B star is small, 4-5 delta mag, 6-8"
★★ STF1973 7.6 8.8 30.8'' 320° 2015 CrB 15h46m24.50s +36°26'45.60"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 20x sind beide Sterne gut getrennt erkennbar - schöner Farbkontrast zwischen beiden ungleich hellen Sternen
Uwe Pilz
Leipzig (Germany)
105mm (53x) blaugrün-orange, trennbar bei 15x ../projects/doublestars/uwe_pilz/sketches/stf1973.jpg
Robert Zebahl
Leipzig (Germany)
120mm (23x) Nice double star, easy to split with noticeable difference in brightness.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide, 1 delta magnitude white.
BU621 7.9 9.4 0.7'' 26° 2014 Boo 15h49m49.96s +44°31'19.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) nice, split with seeing, 2 delta mag, very close, very slightly orange and yellow stars.
SKF1311 5.3 10.3 74.8'' 300° 2015 Ser 15h50m17.55s +02°11'47.50"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Cool. Bright yellow-orange star broken up by seeing and with a water vapor glow (sky is deteriorating). Much fainter B star hanging at edge of halo.
BU810 9.1 10.8 1.6'' 86° 2009 Her 15h51m00.24s +42°27'59.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Very cool, light orange and blue, close but very good split. 2 delta mag.
H3 7, bet 1 Sco AC 2.6 4.5 13.6'' 20° 2018 Sco 16h05m26.23s -19°48'19.40"
Christopher Hay
Seeheim (Germany)
15x45 Stabilised binoculars, handheld. Difficult handheld in this instrument, but clearly split and attractive as such. Tripod mounting would surely help and make the difference for a nice pair for this magnification. One of the earliest doubles split, found by Benedetto Castelli in 1627, but according to Stelledoppie not a physical double (in contrast to the very tight BU 947 AB pair in the system, which is physical, with a separation of 0.3” in 2020 and 0.4” in 2030 – and the wide PWL 9001 AD pair with a separation of 518” – A, B and D are thus a physical triple). “H“ in the catalogue name means that this double star is listed in the catalogue of W. Herschel. The 3 in the name means that it is a double star of the 3rd Class [separation 5'' - 15''] in Herschel’s system.
COU1276 10.9 12.9 2.7'' 55° 2006 CrB 16h08m52.28s +37°58'00.80"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Good find, B star only visible averted vision, flashes out obvious and clear.
STF2025 8.0 9.8 2.6'' 164° 2015 Her 16h11m11.71s +47°33'36.10"
Rene Merting
Drachhausen (Germany)
100mm (107x) bei 107x wird mit viel Konzentration Komponente B südlich von A ganz knapp getrennt und wie ein Schatten bzw. wie eine zarte Andeutung erkennbar - bei 142x habe ich vergeblich versucht, B noch einmal zu erblicken - schwer
Mark McCarthy
Fremont (California/USA)
317mm (553x) Unrelated wide near equal white pair split in finder, but one has a very faint ~2 delta mag 2-3" companion and is the AB pair. Nice!
H5 6, nu Sco AC 4.3 6.6 41.4'' 337° 2018 Sco 16h11m59.74s -19°27'38.30"
Christopher Hay
Seeheim (Germany)
15x45 Stabilised binoculars, handheld. Widely separated. Nice pair reminiscent of Beta Lyrae at 10x. Also split clearly in stabilised handheld 10x42, but view not as pleasing as in 15x45.
STF2021, 49 Ser AB 7.4 7.5 4.1'' 358° 2018 Ser 16h13m18.45s +13°31'37.20"
Robert Zebahl
Leipzig (Germany)
70mm (57x) Lovely split. Almost equal pair with relatively close components.
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 32x zeigen sich zwei gleich helle weiße Sterne, die sich gerade noch berühren - bei 64x dann knappe Trennung, B ist nur minimal schwächer
Mark McCarthy
Fremont (California/USA)
317mm (553x) Equal yellow-white stars, ~4".
BU951 AB-C 9.3 10.1 1.0'' 32° 2014 CrB 16h23m32.23s +33°21'27.80"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Wow seeing is amazing getting airy disks 20 inch 667x, orange and blue stars, very nice split, dare I say wide (AB is near equal 0.1" pair, try again to notice out of round)
★★ STF2054 AB 6.2 7.1 0.9'' 351° 2018 Dra 16h23m47.19s +61°41'47.00"
Robert Zebahl
Leipzig (Germany)
70mm (133x) Not split in any way.
Robert Zebahl
Leipzig (Germany)
102mm (160x) Immediately visible as a double star. The diffraction disks overlapped slightly. The difference in brightness was clearly visible. Together with the nearby double star eta Dra in the same field of view, the sight was highly fascinating, as both double stars are very different in their appearance. ../projects/doublestars/robert_zebahl/sketches/2019-06-25_stf2054.jpg
Uwe Pilz
Leipzig (Germany)
105mm (198x) verformte Beugungsscheibe, auf den ersten Blick erkennbar ../projects/doublestars/uwe_pilz/sketches/stf2054.jpg
Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt
★★ STT312, eta Dra, 14 Dra AB 2.8 8.2 4.4'' 143° 2015 Dra 16h23m59.51s +61°30'50.70"
Robert Zebahl
Leipzig (Germany)
70mm (133x) Not split in any way.
Robert Zebahl
Leipzig (Germany)
102mm (160x) Easy. Very large difference in brightness. The faint companion appeared as a tiny star outside the first diffraction ring of the primary component. Highly recommended, especially with the nearby double star STF 2054! ../projects/doublestars/robert_zebahl/sketches/2019-06-25_eta_dra.jpg
★★ TDS9883 11.7 11.9 0.8'' 299° 1991 CrB 16h24m38.78s +31°59'42.90"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Very extraordinarily fine, only at the best moments, a very close pair hairline split, very faint.
★★★ rho Oph, 5 Oph H2 19 AB 5.1 5.7 3.0'' 334° 2017 Oph 16h25m35.03s -23°26'47.00"
H2 19 AC 5.1 7.3 149.2'' 2000
H2 19 AD 5.1 6.8 156.4'' 252° 2000
KOU63 CF 5.8 11.7 4.8'' 206° 2000
BU1115 DE 6.8 8.4 0.2'' 200° 2017
Stefan Loibl
Rosenheim (Germany)
102mm (102x) AB: possible components (DE) and (CF) already visible at 27x magnification with ca. 2 arcmin distance
STF2048 AB 6.6 9.7 5.6'' 297° 2015 Oph 16h28m48.99s -08°07'43.20"
Rene Merting
Drachhausen (Germany)
100mm (107x) schlechtes Seeing bzw. unerwartet heftiger Tanz der Sterne - erst bei 107x kann ich Komponente B ganz schwach west-nordwestlich von A erkennen - großer Helligkeitsunterschied - die Trennung hat keine Freude bereitet
Stefan Loibl
Rosenheim (Germany)
102mm (102x) nice faint pair, both components orange
lambda Oph, 10 Oph, STF2055, Marfic AB 4.2 5.2 1.4'' 44° 2018 Oph 16h30m54.84s +01°59'02.80"
Stefan Loibl
Rosenheim (Germany)
102mm (205x) components cannot be split at 205x
Uwe Pilz
Leipzig (Germany)
105mm (288x) schöner Farbkontrast, lohnend. ../projects/doublestars/uwe_pilz/sketches/190721LambdaOph.jpg
Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt ../projects/doublestars/frederik_wanink/sketches/Marfic.jpg
STF2059 8.8 8.8 0.4'' 182° 2009 Her 16h30m55.71s +38°03'52.60"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) nicht als DS gesehen
Mark McCarthy
Fremont (California/USA)
317mm (553x) Overlapping disks, notched. Need perfect seeing. This was 1.2" at Struve's discovery, so easier for him to see -- I doubt he would have found it now, near its closest separation. August 2017
STT313 8.0 8.3 0.9'' 129° 2015 Her 16h32m33.19s +40°06'47.70"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) mit Zwischenraum zu sehen ../projects/doublestars/frederik_wanink/sketches/STT313.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Clean split, near equal pair. Nice
★★★ 16/17 Dra STFA30, 16/17 Dra AC 5.4 5.5 90.0'' 193° 2017 Dra 16h36m13.72s +52°55'27.80"
STF2078, 17 Dra AB 5.4 6.4 3.3'' 104° 2018
Robert Zebahl
Leipzig (Germany)
55mm (27x) STFA30 (AC): Rather wide pair with almost equal components. C component appeared slightly yellowish-orange.
Robert Zebahl
Leipzig (Germany)
55mm (71x) STF2078 (AB): Grand sight! ../projects/doublestars/robert_zebahl/sketches/2019-05-18_16_17_dra.jpg
Christopher Hay
Seeheim (Germany)
80mm (30x) 16 Dra seems more bluish than 17 Dra, the latter seems slightly yellow in comparison and is distinctly elongated. At 84x 17 Dra is cleanly split and such a delightful view together with 16 Dra that I had no desire to ramp up the magnification. All three stars belong to a physical system.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) STF2078 (AB): sehr schönes Dreiersystem ../projects/doublestars/frederik_wanink/sketches/17Dra.jpg
STF2084, zeta Her, 40 Her 3.0 5.4 1.6'' 121° 2017 Her 16h41m17.16s +31°36'09.80"
Robert Zebahl
Leipzig (Germany)
102mm (224x) Faint companion as distinct brightening on the first diffraction ring visible. In steadier moments visible as small, round condensation. ../projects/doublestars/robert_zebahl/sketches/2019-06-30_zeta_her.jpg
Robert Zebahl
Leipzig (Germany)
102mm (280x) After a longer, concentrated observation, a permanent brightening of the first diffraction ring of the primary component could be seen at the correct position angle. The brightening appeared only arch-shaped without any noticeable condensation. ../projects/doublestars/robert_zebahl/sketches/2019-06-25_zeta_her.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) äußerst schwierig
Uwe Pilz
Leipzig (Germany)
105mm (288x) Bei sehr ruhiger Luft ohne Probleme sichtbar, trotz der störenden Restkoma meines Refraktors ../projects/doublestars/uwe_pilz/sketches/190721ZetHer.jpg
Frederik Wanink
Itterbeck (Germany)
254mm (640x) nicht als DS gesehen
Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt ../projects/doublestars/frederik_wanink/sketches/STF2084.jpg
STF2094 AB 7.5 7.9 1.1'' 73° 2018 Her 16h44m10.57s +23°31'02.80"
Mark McCarthy
Fremont (California/USA)
317mm (277x) White-orange pair of equal magnitude, clean split when the seeing stills
STF2095 7.4 9.2 5.2'' 161° 2015 Her 16h45m05.23s +28°21'28.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice! Yellow and white pair, 2 delta mag, 4"
★★ 52 Her A1866 BC 9.5 9.6 0.3'' 266° 2012 Her 16h49m14.20s +45°59'00.40"
BU627 A-BC 4.8 8.4 2.1'' 43° 2017
Rene Merting
Drachhausen (Germany)
100mm (142x) BU627 (A-BC): bis 142x probiert, hat nicht funktioniert - der Helligkeitsunterschied ist vermutlich zu groß und das Beugungsscheibchen von A so hell wie BC selbst
Robert Zebahl
Leipzig (Germany)
102mm (280x) BU627 (A-BC): At 160x the faint component is already beginning to be visible as brightening in the first diffraction ring. At 280x the brightening is quite clearly visible and appears partly clear as a small knot in the first diffraction ring.
Uwe Pilz
Leipzig (Germany)
105mm (288x) BU627 (A-BC) ../projects/doublestars/uwe_pilz/sketches/52Her.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) BU627 (A-BC): 52 Her. Very bright white star with a companion disk 2", 4-5 delta mag. Wow! B appears as if it is illuminated by A's light. Did not detect BC, 0.3"
★★ STF2103 AB 5.9 10.0 5.2'' 44° 2015 Her 16h49m34.67s +13°15'40.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White and 4 delta mag B, 4". Nice!
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice! Pretty bright white A, much fainter 5 delta mag B, well separated, looks like a planet.
★★ STF2107 AB 6.9 8.5 1.4'' 107° 2018 Her 16h51m50.10s +28°39'58.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and orange pair, very close ~1.5", 1 delta mag. Very pretty.
Mark McCarthy
Fremont (California/USA)
508mm (667x) Nice pair yellow and slightly blue two delta mag, about 1.5" (AC is 11.5 and much further separated)
★★ BU822 AB 6.6 9.9 1.4'' 227° 2010 Her 17h03m52.67s +19°41'25.80"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Bright orange star with a consistent pin-prick point of light, stays still in occasional seeing shimmer. Fainter than PRY 2's B. ~1.5”. In same field as PRY 2, same PA as PRY 2's.
★★ PRY2 AB 6.2 9.3 1.8'' 227° 2012 Her 17h04m41.34s +19°35'56.70"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Blue-white and slightly reddish B, 3-4 delta mag, 1.5”. Not hard at all! Makes a double-double with BU 822 at 277x
★★ mu Dra, 21 Dra, Alrakis, Arrakis STF2130 AB 5.7 5.7 2.6'' 2018 Dra 17h05m20.20s +54°28'14.30"
BU1088 AC 5.7 13.7 12.6'' 175° 2006
Christopher Hay
Seeheim (Germany)
80mm (100x) In May 2019 neatly split, no colours seen. A physical system with a period of 812 years. Periastron was in 1946, since then the distance is widening to reach 2.7“ in 2025 and 2.8“ in 2030
Robert Zebahl
Leipzig (Germany)
102mm (125x) AB: Easy to separate. Beautiful sight. Components equally bright with no discernible color difference.
Frederik Wanink
Itterbeck (Germany)
254mm (460x) AB: gleich hell ../projects/doublestars/frederik_wanink/sketches/STF2130.jpg
STT324 6.0 10.7 3.6'' 222° 2016 Her 17h08m00.70s +31°12'22.50"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Very interesting. At 20 inch the a star was orange and bloated with the seeing, did not notice a pair. I used the 8 inch mask which tightened the A star up considerably, then with averted vision could discern a very faint small glow in one particular direction, but could not hold it direct. Back to the 20" and now in good moments I can see the B star quite well, 5 delta mag, bluish. 333x
★★ HO557, AK Her 8.6 12.0 4.5'' 323° 2015 Her 17h13m57.81s +16°21'01.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) B only visible with averted vision. As I drift from averted back to direct the star fades and I can only hold direct for a moment before it disappears. Very interesting effect. ~5” and 4 delta mag.
★★ STF2140, alpha Her, 64 Her, Ras Algethi AB 3.5 5.4 4.8'' 104° 2018 Her 17h14m38.86s +14°23'24.90"
Robert Zebahl
Leipzig (Germany)
55mm (41x) Well split with noticeable difference in brightness.
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 32x ist noch nichts erkennbar - bei 64x wird östlich von Rasalgethi der schwache Begleiter B knapp getrennt sichtbar - A ist strahlend gelb, B mit einer Tendenz zum gelb, eher ein warmes weiß
Uwe Pilz
Leipzig (Germany)
105mm (88x) himmelblau und hellgelb, getrennt bei 53x ../projects/doublestars/uwe_pilz/sketches/191025_alphaHer.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) gelb-lachsfarben
Robert Zebahl
Leipzig (Germany)
120mm (100x) Easily split with noticeable difference in brightness. A: intensively orange colored, B: slightly orange.
Mark McCarthy
Fremont (California/USA)
203mm (667x) Rasalgethi. 8" inch mask due to seeing. AB orange and blue 4 delta mag. Faint AD seen very wide separation. pretty star.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) gelblich und bläulicher Stern ../projects/doublestars/frederik_wanink/sketches/AlphaHer.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) Rasalgethi, Bright orange A & pale green much fainter B. Very nice!
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright orange and blue-green-grey B.
Jens Leich
Germany
130mm ../projects/doublestars/jens_leich/photographs/Doppelstern_Rasalgethi_Herkules_220719_2159UT_RGB.jpg
STF3127, delta Her, 65 Her AB 3.1 8.3 12.7'' 288° 2013 Her 17h15m01.92s +24°50'22.50"
Robert Zebahl
Leipzig (Germany)
102mm (86x) Easy. Pretty wide apart with large difference in brightness. ../projects/doublestars/robert_zebahl/sketches/2019-06-23_delta_her.jpg
Mark McCarthy
Fremont (California/USA)
203mm (667x) Very bright yellow white A and bluish B at least four delta mag, wide separation. I don't think it would be seen but for the mask tightening A's diffraction
Mark McCarthy
Fremont (California/USA)
317mm (277x) Delta Her: Nice wide pair, good image quality, yellow and lighter yellow
Mark McCarthy
Fremont (California/USA)
317mm (553x) Sarin. Very bright and much fainter B, looks like a planet
★★ STT328, 68 Her 4.7 10.3 4.5'' 56° 2017 Her 17h17m19.57s +33°06'00.40"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Very bright A & much fainter B, fairly widely separated.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint but steadily held B, ~8", 4 delta mag. Nice!!
★★ HEI246 11.0 11.5 0.7'' 32° 1994 Her 17h18m13.17s +15°58'13.70"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Wow! very nice just nearly unequal close but well split orange stars. one is obviously fainter than the other but not by much
★★★ BU628 9.5 9.6 0.5'' 265° 2010 Her 17h18m22.22s +32°39'38.50"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Wow split clean, amazing. No resolution at 667x but at 1067x two airy disks, sep by half disk, half delta mag. Remarkable
★★★ COU994 9.4 11.2 0.5'' 214° 2011 Her 17h19m44.04s +37°02'37.30"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) At very best moments A presents a perfect disk, and a point resolves within the first faint diffraction ring, very faint and small Amazing.
★★★ A2088 9.9 10.0 0.4'' 2011 Her 17h20m32.37s +47°38'51.50"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) sharp and clean split in best moments, seeing lasts a couple seconds. Otherwise it's touching disks.
★★ A2184 AB 7.3 10.6 1.9'' 31° 2015 Her 17h27m32.79s +16°27'24.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Wow! real nice when seeing stills and with some critical focusing the diffraction of the star tightens and the three delta mag B shows on its own as a sharp point well separated and round. Really great view
★★ STFA35, nu 1/2 Dra, 24/25 Dra 4.9 4.9 62.1'' 311° 2017 Dra 17h32m15.88s +55°10'22.10"
Christopher Hay
Seeheim (Germany)
6x20 Split, but not the fine sight it becomes in the 10x42.
Christopher Hay
Seeheim (Germany)
10x42 Clearly split, components of identical brightness, no colour. One of the finest doubles for 10x.
Rene Merting
Drachhausen (Germany)
16x70 der Doppelstern ist bereits mit bloßem Auge zu erkennen, im FG dann offenbart sich ein ordentlich getrenntes Pärchen zweier gleich heller Sterne
Robert Zebahl
Leipzig (Germany)
102mm (28x) Wide, bright, equal pair. Both components looked cream-white. Due to the distance a double for binoculars.
Christopher Hay
Seeheim (Germany)
125mm (80x) Gorgeous sight, widely split, dominating the FOV. The more northern B-component (=Nu1 Dra = 24 Dra) appears brighter and more yellowish than the A-component (=Nu2 Dra = 25 Dra).
★★★ COU1594 10.7 10.6 0.5'' 332° 2010 Her 17h33m59.60s +44°28'45.60"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Needed to wait for seeing but a very extraordinarily fine point resolves with the best seeing, seems much fainter than data but it's definitely there, a hard point.
★★ STF2241, psi 1 Dra, 31 Dra AB 4.6 5.6 30.1'' 17° 2018 Dra 17h41m56.36s +72°08'55.80"
Christopher Hay
Seeheim (Germany)
15x45 Stabilised binoculars, handheld. Easily split. A appears pearl white, B brick red. A very fine pair for 15x. Resolved in stabilised 10x42 but not so pleasantly. Psi1 Dra is a physical double with a period of roughly 10,000 years.
Rene Merting
Drachhausen (Germany)
16x70 ein auffälliges Pärchen in einem wilden Sterngewimmel vieler heller Sterne, beide Komponenten sind knapp getrennt zu erkennen - Komponente B ist mindestens eine Größenklasse schwächer und strahlt nicht so schön reinweiß wie A
Christopher Hay
Seeheim (Germany)
80mm (30x) Widely split. A light yellow, B light blue.
Uwe Pilz
Leipzig (Germany)
105mm (55x) weiß-orange
★★★ COU1596 9.3 9.3 0.2'' 104° 2007 Her 17h42m14.40s +44°22'59.10"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Olive to notched at best moments, equal stars
★★★ HU1288 8.3 9.4 0.4'' 163° 2010 Her 17h47m09.16s +15°02'13.80"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Awesome! clean split, very clean star images. Split by half disk, half delta mag. very cool great catch! suspected at 667x, ramped up power to 1067x to split.
TDT519 11.8 11.9 1.0'' 221° 2015 Her 17h48m54.56s +16°33'10.70"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Extremely fine pair, brightens and elongated with averted vision but it's better to let the seeing settle down the hazy refraction and can see points of stars.
FOX22 10.7 11.3 1.0'' 339° 2010 Her 17h50m41.55s +15°16'15.40"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Half delta mag. actually appears well split, two tiny dots, resolved from haze with seeing. Very cool.
TDT536 10.4 10.8 1.1'' 61° 2015 Her 17h51m18.78s +17°23'08.70"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Very fine pair, well split, 1 delta mag, yellow white stars. Very tight but a nice wide clean split. Resolves with seeing.
STT338 AB 7.2 7.4 0.8'' 164° 2018 Her 17h51m58.46s +15°19'34.90"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt
Mark McCarthy
Fremont (California/USA)
317mm (553x) Just split, a pair of bright near equal orange stars.
Mark McCarthy
Fremont (California/USA)
508mm (667x) Yellow-white very clean split stars seem more equal than what the data says
★★ BU130, 90 Her 5.3 8.8 1.6'' 110° 2009 Her 17h53m18.03s +40°00'28.60"
Robert Zebahl
Leipzig (Germany)
120mm (300x) Not split at 200x and 300x. I used a 120/600mm achromat.
Mark McCarthy
Fremont (California/USA)
317mm (553x) 90 Her. Need stillness, it coalesces from the diffraction to a light orange point at 553x (grey at 885x). No doubt about it, star, point light. For the first 10 minutes of observing seeing allowed me to glimpse it 1 of every 10 seconds. But after a while seeing was better and I could hold it pretty consistently in both magnifications. At 553x it's in the first ring, at 885x it's in the second.
Mark McCarthy
Fremont (California/USA)
317mm (885x) 90 Her. Definite snowman or bulge to the disk, very subtle, but no split, using an apodizing mask.
HU235 6.9 9.0 1.6'' 286° 2015 Her 17h57m05.08s +45°51'21.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very certain point sitting just outside the diffraction ring, brightens and sharpens with seeing. 2" 2-3 delta mag.
★★ STF2308 40/41 Dra AB 5.7 6.0 18.7'' 232° 2018 Dra 18h00m09.07s +80°00'13.70"
AC 5.7 8.3 224.8'' 129° 2004
Christopher Hay
Seeheim (Germany)
15x45 AB: Clearly split, brighter component seems bluish. One of the finest doubles for 15x, hence my two-star rating. In 10x42 a difficult split at the limit.
Rene Merting
Drachhausen (Germany)
16x70 ein schön eng stehendes Pärchen, die Himmelsrichtungen erschließen sich mir hier leider nicht, aber die Komponenten sind beide ähnlich hell und weiß - schöner Anblick im Fernglas
Christopher Hay
Seeheim (Germany)
50mm (8x) AB: An elongated figure-8 very close to splitting
Christopher Hay
Seeheim (Germany)
80mm (30x) AB: Very clearly split, dominates the 2.5° FOV, with interesting sprinkling of fainter stars throughout the field.
Robert Zebahl
Leipzig (Germany)
102mm (28x) Very nice, slightly uneven pair. Components appeared yellowish-white. Beautiful surroundings. On the sketch the components A, B and C are visible. ../projects/doublestars/robert_zebahl/sketches/2019-06-30_40_41_dra.jpg
Uwe Pilz
Leipzig (Germany)
105mm (100x) AB: =40/41 Dra. Auffallend
Christopher Hay
Seeheim (Germany)
140mm (75x) AB: Wide apart, the pair absolutely dominates the field of view, with attractive sprinkling of fainter stars to the west. Very delicate colour contrast that was hard to grasp in 3-inch scope now becomes clear, component B (40 Dra) is bluish, component A (41 Dra) yellowish.
BU1127 AB 7.3 9.2 0.8'' 42° 2016 Her 18h02m30.89s +44°14'02.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very tough but a small point of a star resolved at the rim of the diffraction ring at both 553x & 885x, using kind of a partial averted vision.
STT341, V772 Her AB-C 7.2 10.6 28.2'' 171° 2015 Her 18h05m49.72s +21°26'45.60"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ist Komponente C weit getrennt südlich von AB als Hauch von einem Stern erkennbar
AC15, 99 Her AB 5.1 9.0 1.2'' 317° 2011 Her 18h07m01.61s +30°33'42.70"
Mark McCarthy
Fremont (California/USA)
203mm (667x) 99 Her.Very nice. B star resolves just outside first diffraction ring when that ring has faded with good seeing, a very fine faint point. large delta mag. There are many other pairings in this system, including 0.2" for the A star]
Mark McCarthy
Fremont (California/USA)
317mm (553x) Extremely faint B, just on diffraction ring, with seeing, both 553x & 885x. ~1"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 99 Her: ! Bright yellow star, suspected double at 277x but needed 553x to resolve a 9th mag orange B when seeing stilled, resolved as a point just outside where the diffraction ring was. CDSA notes: "Local, solar type binary, faint field. AB system 1.8 solar mass, p=56 y orbit r = 17 AU, e = 0.77, apastron 2025"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 99 Her. Faint point seen in the diffraction of brighter star disk.
★★ HU674 7.7 8.6 0.7'' 214° 2018 Her 18h09m40.64s +50°24'07.40"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt, ähnlich hell ../projects/doublestars/frederik_wanink/sketches/HU674.jpg
Mark McCarthy
Fremont (California/USA)
508mm (333x) Split with seeing at 333x, near equal white.
ES1651, TZ Lyr 11.2 12.4 2.4'' 2003 Lyr 18h15m49.67s +41°06'37.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Challenging! Faint elongated star with direct vision. With averted vision it flashes a split, half delta mag, just split.
★★★ BU641 7.0 8.7 0.8'' 341° 2015 Her 18h21m48.44s +21°30'27.90"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) sehr schwierig ../projects/doublestars/frederik_wanink/sketches/BU641.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Extraordinary! Moderately bright A and very much fainter B, 4-5 delta mag, <1" separation. Seeing needs to still.
STF2323, 39 Dra AC 5.1 8.0 89.1'' 19° 2017 Dra 18h23m54.65s +58°48'02.10"
AB 5.1 8.1 3.8'' 348° 2018
Robert Zebahl
Leipzig (Germany)
55mm (27x) AC: Pretty wide, unequal pair. Die brighter A component appeared white.
Robert Zebahl
Leipzig (Germany)
55mm (71x) AB: Very nice. The B component seemed to be comparable faint as the C component. ../projects/doublestars/robert_zebahl/sketches/2019-05-18_39_dra.jpg
STF2315 AB 6.6 7.8 0.6'' 117° 2018 Her 18h24m58.46s +27°23'41.30"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) als 8 zu sehen ../projects/doublestars/frederik_wanink/sketches/STF2315.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) ! Hairline split @ 553x near equal mag. Suspected elongation at 277x.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near contact / overlapping disks, 0.5 delta mag. September 2017
TDT886 11.0 11.3 0.5'' 24° 1991 Her 18h27m27.80s +24°17'10.40"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Extremely fine. At first it seems not split, but in best moments B stretches out and pops out from B, 0.5" and 1 delta mag.
STF2320 7.1 8.9 0.9'' 2015 Her 18h27m45.89s +24°41'50.80"
Mark McCarthy
Fremont (California/USA)
203mm (667x) V994 Her. Seen with the 20", but used the 8" mask to clean up the images. Two delta mag, ~1" very nice pair. [eclipsing binary of Algol type--surely not seeing the eclipsing star? In fact, both A & B each are eclipsing binaries, the first such system to be discovered in the whole sky!]
Frederik Wanink
Itterbeck (Germany)
254mm (640x) ../projects/doublestars/frederik_wanink/sketches/STF2320.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice! Blue-white stars, 1", 2 delta mag.
Mark McCarthy
Fremont (California/USA)
508mm (333x) Close in pair to A in the 20" but it disappeared in 8", 1 delta mag.
STF2337 AB 8.1 9.1 16.6'' 297° 2018 Sct 18h34m55.15s -14°42'10.60"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 20x gut trennbar, Helligkeitsunterschied zwischen A und B gut eine halbe Magnitude - bei 32x noch einfacher, und Verstärkung des schönen Farbkontrastes, Komponente A im Südosten ist weiß-bläulich und Komponente B zinnober-rot
★★ STT359 6.3 6.6 0.7'' 2018 Her 18h35m30.40s +23°36'19.90"
Uwe Pilz
Leipzig (Germany)
105mm (198x) leicht eingekerbt, Abstand 0“75 ../projects/doublestars/uwe_pilz/sketches/stt359.jpg
Mark McCarthy
Fremont (California/USA)
203mm (667x) Kissing 8" 333x, hairline split 667x. Near equal white A and bluish white B.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt ../projects/doublestars/frederik_wanink/sketches/STT359.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice! ~0.8" equal yellow-orange stars.
★★ STT358 AB 6.9 7.1 1.6'' 148° 2018 Her 18h35m53.22s +16°58'32.50"
Uwe Pilz
Leipzig (Germany)
105mm (110x) fast gleich hell, deutlich trennbar
Mark McCarthy
Fremont (California/USA)
203mm (333x) Pretty, near equal white, perfect disks.
STF2351 7.6 7.6 5.1'' 160° 2017 Lyr 18h36m12.00s +41°16'41.20"
Robert Zebahl
Leipzig (Germany)
70mm (57x) Beautiful, little double star with equally bright components at a moderate distance.
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 32x sind zwei Sterne zu erkennen, die sich noch berühren - bei 64x zeigt sich dann nein knapp getrenntes Pärchen - fast kein Helligkeitsunterschied, ich habe Komponente A für die schwächere der beiden in etwas gleich hellen Sterne gehalten - Komponente B ist warm-weiß
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright yellow-orange equal pair, wide.
★★ alpha Lyr, 3 Lyr, Vega H5 39 AB 0.1 9.5 83.7'' 184° 2017 Lyr 18h36m56.33s +38°47'01.20"
STFB9 AC 0.1 11.0 76.0'' 255° 2012
STFB9 AE 0.1 9.5 86.6'' 39° 2017
Joerg S. Schlimmer
Germany
127mm (203x) um Vega mehrere Beugungsringe sowie Speckles sichtbar, B leicht zu sehen, E nicht sichtbar ../projects/doublestars/joerg_schlimmer/sketches/Zeichnung_Vega_20190626_ausschnitt_filtered.jpg
Joerg S. Schlimmer
Germany
127mm (203x) verschiedene Vergrößerungen zwischen 40 und 203 fach, Komponente E zeitweise bei indirektem Sehen sichtbar, da Himmel heute klarer ist ../projects/doublestars/joerg_schlimmer/sketches/Zeichnung_Vega_20190627_ausschnitt_filtered.jpg
★★ STF2358 9.8 10.2 2.5'' 224° 2015 Lyr 18h38m35.04s +30°43'20.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint near equal <2", another brighter / wider pair nearby. Nice!
★★★ epsilon Lyr STFA37 AB-CD 4.7 4.6 209.5'' 172° 2016 Lyr 18h44m20.34s +39°40'12.40"
STFA37 AI 5.2 10.1 149.5'' 137° 2015
STF2382, 4 Lyr, epsilon 1 Lyr AB 5.2 6.1 2.2'' 346° 2018
STF2383, 5 Lyr, epsilon 2 Lyr CD 5.2 5.4 2.4'' 76° 2018
Christopher Hay
Seeheim (Germany)
2x54 AB-CD: Clean split. Actually more pleasant than in 4x10 binoculars, presumably due to more steady handheld view.
Robert Zebahl
Leipzig (Germany)
55mm (59x) STF2382 (AB): At 42x slightly elongated, at 59x elongated and obviously notched.
Robert Zebahl
Leipzig (Germany)
55mm (59x) STF2383 (CD): At 42x clearly elongated, but without any visible notch. At 59x split with touching diffraction disks.
Robert Zebahl
Leipzig (Germany)
70mm (57x) STF2382 (AB): Obviously seen as figure '8'.
Robert Zebahl
Leipzig (Germany)
70mm (57x) STF2383 (CD): Split, but extremely tight with almost touching diffraction disks.
Rene Merting
Drachhausen (Germany)
100mm (107x) STF2382 (AB): bei 64x ist das Sternpaar mit leichter Einschnürung und Nord-Süd-Ausdehnung erkennbar - beide Sterne stehen minimal enger zusammen als das südlichere Paar STF2383 - bei 107x knappe Trennung, Komponente B nördlich ist mindestens eine halbe Größenklasse schwächer als A
Rene Merting
Drachhausen (Germany)
100mm (107x) STF2383 (CD): bei 64x als 8 mit Ost-West-Ausdehnung erkennbar - bei 107x knapp getrennt, beide Komponenten sind etwa gleich hell
Robert Zebahl
Leipzig (Germany)
102mm (125x) Stunning view of the components A-D and I! ../projects/doublestars/robert_zebahl/sketches/2019-06-26_epsilon_lyr.jpg
Uwe Pilz
Leipzig (Germany)
105mm (26x) bei 22x nicht trennbar ../projects/doublestars/uwe_pilz/sketches/epsLyr2.jpg
Joerg S. Schlimmer
Germany
127mm (203x) easy to split ../projects/doublestars/joerg_schlimmer/sketches/Zeichnung_Epsilon-Lyrae_ausschnitt_filtered.jpg
Uwe Pilz
Leipzig (Germany)
320mm (200x) 7 Komponenten!! A-B-C-D-E-F-I ../projects/doublestars/uwe_pilz/sketches/epsLyr.jpg
Berthold Fuchs
Wiesbaden (Germany)
130mm Double-Double ../projects/doublestars/berthold_fuchs/photographs/epsilon Lyrae.png
STFA38, zeta Lyr, zeta 1/2 Lyr AD 4.3 5.6 43.7'' 150° 2018 Lyr 18h44m46.36s +37°36'18.40"
Christopher Hay
Seeheim (Germany)
10x42 Clearly separated. Colour contrast between bluish A and orangish D is there if one knows it, but not as striking as in 15x45 binoculars.
Christopher Hay
Seeheim (Germany)
15x45 Component A clear blue-white, component D very pale tangerine orange. Wide split. Colour contrast seems even greater than that of nearby Delta 1/2 Lyrae. Physical double.
Mark McCarthy
Fremont (California/USA)
80mm (13x) Zeta 2 Lyr. Slightly greenish-white stars. Best view in finder, cleaner. Wide, 1 delta mag.
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 20x weit getrennt, Komponente A weißlich, D leicht gelblich
Uwe Pilz
Leipzig (Germany)
105mm (88x) weiß-orange ../projects/doublestars/uwe_pilz/sketches/zetaLyr.jpg
STF2393 AB 7.8 10.4 18.2'' 24° 2015 Lyr 18h45m10.84s +38°18'54.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty light orange and light blue! Wide separation, 1.5 delta mag.
STF2375 AB 6.3 6.7 2.6'' 121° 2018 Ser 18h45m28.36s +05°30'00.40"
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 64x sehe ich zwei sehr dicht stehende Sterne, mit etwas Geduld wird ab und an eine knappe Trennung deutlich - beide sind in gleich hell (ich habe sogar A und B falsch zugeordnet, weil ich B knapp heller fand) und strahlen um die Wette in weiß
Stefan Loibl
Rosenheim (Germany)
102mm (102x) 'Tweedledum' and 'Tweedledee', recognizable as double star at 68x, clearly split at 102x, components equally bright, quadruple, visual double
STF2390 7.4 8.6 4.3'' 155° 2016 Lyr 18h45m49.83s +34°31'06.60"
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 64x ploppt Komponente B knapp getrennt auf, vorher war sie unsichtbar - Farben Fehlanzeige
Uwe Pilz
Leipzig (Germany)
105mm (88x) ../projects/doublestars/uwe_pilz/sketches/191031STF2390.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) Orange and very wide separation B, 2x fainter B, bluish.
★★ STF2406 7.1 11.2 4.6'' 2016 Lyr 18h49m55.77s +26°25'30.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright white, 3-4 delta mag, B is averted vision only and delicate, with seeing. Wow!
Mark McCarthy
Fremont (California/USA)
508mm (667x) White star no split at 8" 333x and 667x, but needed the 20" to see the well separated B star.
★★ beta Lyr, 10 Lyr STFA39 AB 3.6 6.7 45.7'' 149° 2017 Lyr 18h50m04.79s +33°21'45.60"
BU293 AE 3.6 10.1 67.2'' 317° 2015
BU293 AF 3.6 10.6 86.0'' 18° 2015
Christopher Hay
Seeheim (Germany)
10x42 AB: Stabilised binoculars, handheld. B is well apart from A and distinct. Very pretty!
Robert Zebahl
Leipzig (Germany)
70mm (22x) At 22x and 57x the components A, B, E and F were easily seen. The B component appeared slightly bluish-silver at 22x, but at 57x the color was difficult to tell. All four components form a slightly curved 'Y' with the bright A component in the center.
Rene Merting
Drachhausen (Germany)
100mm (32x) AB: bei 32x sind die Komponenten A und B weit getrennt, B ist deutlich schwächer - zwei gleichhelle Fühlersterne (E und F) nördlich von Komponente A machen das System interessanter - sie sind noch schwächer als B - Farbe konnte ich bei keinem der vier Sterne erkennen
Robert Zebahl
Leipzig (Germany)
102mm (62x) Components A, B, E and F are easily visible. The two southern stars on the drawing do not belong to the system. ../projects/doublestars/robert_zebahl/sketches/2019-06-23_beta_lyr.jpg
Uwe Pilz
Leipzig (Germany)
105mm (139x) AB: Begleiter ist tiefrot; die Natur des Systems ist unsicher ../projects/doublestars/uwe_pilz/sketches/betaLyr.jpg
Uwe Pilz
Leipzig (Germany)
105mm (144x) schon sichtbar bei 26x, aber schwierig. A blauweiß, B orange. ../projects/doublestars/uwe_pilz/sketches/191031betaLyr.jpg
Joerg S. Schlimmer
Germany
127mm (108x) easy to split ../projects/doublestars/joerg_schlimmer/sketches/Zeichnung-beta-Lyrae_filtered_96dpi.jpg
BU265 7.4 9.2 1.4'' 231° 2015 Aql 18h50m14.94s +11°31'21.50"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Very tremulous B star appears with seeing, surprisingly difficult for the mag, maybe because so close.
Mark McCarthy
Fremont (California/USA)
317mm (553x) ~1.5”, faint, 2 delta mag
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint but resolved B at outer diffraction ring when seeing stills. Yellow A, bluish B.
STF2404 6.9 7.8 3.5'' 182° 2018 Aql 18h50m45.55s +10°58'35.20"
Robert Zebahl
Leipzig (Germany)
70mm (44x) Already at 22x the double star is striking due to its orange color. At 44x split, but rather tight with a clear difference in brightness. At 100x the primary component appears in a bright orange, the secondary component shows a blueish tint.
Mark McCarthy
Fremont (California/USA)
203mm (667x) Light orange and light blue, pretty.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) beide gelblich ../projects/doublestars/frederik_wanink/sketches/STF2404.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Both orange, very well split, around 7”
Mark McCarthy
Fremont (California/USA)
317mm (553x) well split, yellow A and yellow-orange B.
RST4605 11.2 11.6 0.9'' 141° 1995 Aql 18h50m58.96s -02°38'02.20"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Very, very fine, faint, split, quarter delta mag. Very tough considering proximity to nearly full moon with poor transparency. Nice!
HU199 9.1 9.5 0.9'' 345° 2015 Aql 18h52m07.48s +11°47'54.30"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Wow! With seeing very tight very faint but split near equal. very cool.
delta Lyr, 11/12 Lyr, delta Lyrae Cluster, Stephenson 1 H6 3, delta 1 Lyr 5.5 9.9 175.3'' 20° 2012 Lyr 18h53m43.56s +36°58'18.20"
ES2028, delta 2 Lyr AB 4.3 11.2 86.3'' 349° 2014
ES2028, delta 2 Lyr BC 11.2 11.6 2.1'' 135° 2008
SMR13, delta 2 Lyr AD 4.5 8.8 193.1'' 210° 2014
SMR13, delta 2 Lyr AE 4.5 10.3 400.6'' 238° 2014
SMR13, delta 2 Lyr AF 4.5 8.8 369.4'' 245° 2014
SMR13, delta 2 Lyr AG 4.5 9.8 335.9'' 261° 2014
SMR13, delta 2 Lyr AH 4.5 8.7 229.4'' 284° 2014
SMR13, delta 2 Lyr AJ 4.3 12.0 279.5'' 249° 2014
SMR13, delta 2 Lyr AK 4.3 12.0 304.2'' 236° 2014
SMR13, delta 2 Lyr HI 8.7 12.9 26.1'' 251° 2015
Joerg S. Schlimmer
Germany
305mm (94x) easy to split ../projects/doublestars/joerg_schlimmer/sketches/Zeichnung-delta-Lyrae_filtered_96dpi.jpg
BU137 AB 8.7 9.0 1.5'' 169° 2015 Lyr 18h53m57.56s +37°22'49.70"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) ../projects/doublestars/frederik_wanink/sketches/BU137.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Fine near equal light orange, ~2". Rich finder field. In Steph 1 open cluster.
Mark McCarthy
Fremont (California/USA)
508mm (667x) Nice bright white near equal stars, 1.5", in a two plus one system with much fainter farther C. (AC 12th mag 23.6")
A2193 8.8 9.2 1.0'' 357° 2017 Ser 18h55m51.23s +03°22'30.80"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Pair of white stars, half delta mag. found very quickly slew to. Nice pair. Very clean split.
STT365 AB 7.2 8.3 0.4'' 288° 1882 Lyr 18h55m57.14s +44°13'41.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very fine, white and blue stars, ~4", 3 delta mag. Nice!
STF2417, theta Ser, 63 Ser, Alya AB 4.6 4.9 22.5'' 104° 2018 Ser 18h56m13.18s +04°12'12.90"
AC 4.6 6.8 421.0'' 58° 2007
Rene Merting
Drachhausen (Germany)
10x50 AB: zwei helle schneeweiße Sterne, knapp getrennt - B im Osten ist nur knapp schwächer - ein schönes enges Pärchen
Rene Merting
Drachhausen (Germany)
16x70 AB: ein gut getrennt zu sehendes Pärchen - beide Sterne stahlen weiß, Komponente B im Osten ist keine halbe Größenklasse schwächer
Rene Merting
Drachhausen (Germany)
100mm (20x) AB: bei 20x ein auffälliges gut getrenntes Sternpaar - Komponente B östlich ist nur leicht schwächer und strahlt ein wenig warm-weißer
Stefan Loibl
Rosenheim (Germany)
102mm (102x) AB: wide pair, hardly any difference in brightness, wonderful field, double stars looks like an embedded pair of eyes
Berthold Fuchs
Wiesbaden (Germany)
130mm AB: easy DS ../projects/doublestars/berthold_fuchs/photographs/theta Ser.png
★★ STF2422 7.9 8.2 0.8'' 68° 2018 Her 18h57m07.83s +26°05'45.10"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Excellent hairline split at 333x with eight inch. Near equal white stars. Picked them out in a crowded field, suspected elongation right away, split with seeing as I centered it in eyepiece, and from then it was a steady split
Frederik Wanink
Itterbeck (Germany)
254mm (640x) schwieriger wegen schwacher Sterne ../projects/doublestars/frederik_wanink/sketches/STF2422.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very tight, <0.8", equal light orange, pretty faint.
COU1156 11.1 11.2 0.7'' 111° 2016 Lyr 19h00m34.25s +33°01'24.80"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Near qual small and at best moments a clean split, still, just nice points. great star
HO92 10.6 10.8 1.3'' 40° 2015 Lyr 19h00m59.89s +32°33'11.60"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Beautifully well split, had an instant of perfect images. White pair near equal.
STF2437 8.4 8.8 0.5'' 2017 Sge 19h01m53.16s +19°10'11.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Small faint, notched peanut when seeing stills. Orange.
COU1935 10.6 11.1 1.1'' 41° 2015 Lyr 19h04m11.37s +38°58'47.40"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Very fine near equal, well split, 1", white. Verified on chart.
★★ 15 Aql, SHJ286 5.5 7.0 39.6'' 211° 2018 Aql 19h04m57.67s -04°01'53.10"
Rene Merting
Drachhausen (Germany)
10x50 sehr auffälliges dicht zusammen stehendes Sternpaar - Komponente A im Norden ist hellgelb, B grau-orange, schöner Farbkontrast
Rene Merting
Drachhausen (Germany)
16x70 ein wunderschönes ordentlich getrenntes Sternpaar - Komponente A im Nordosten samt gelb, B dagegen apricot-orange und gut 1,5 Magnituden schwächer als A - zudem ein interessanter Farbvergleich möglich zu dem mit im Gesichtsfeld stehenden V Aql gut 1,7° weiter südlich, der farblich noch eine Schippe drauf legen kann mit einem kräftigen zinnober-orange
Robert Zebahl
Leipzig (Germany)
70mm (22x) Striking, pretty wide, uneven pair. Primary component gleamed in shiny orange, the companion appeared slightly orange.
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x weit getrennt, Komponente A hellgelb, B dagegen orangefarben - sehenswert
Robert Zebahl
Leipzig (Germany)
200mm (37x) SQM-L 19.9: Easy to split, evident. Both components appeared slightly orange colored.
STF2449 7.2 7.7 8.0'' 289° 2015 Aql 19h06m23.04s +07°09'20.10"
Robert Zebahl
Leipzig (Germany)
70mm (22x) At 22x well separable, but quite close together. Some fainter and similarly bright stars in the immediate surrounding. At 57x small difference in brightness. Main component looked white-blueish, companion slightly orange.
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein knapp getrenntes Pärchen - B-Komponente westlich nur unwesentlich schwächer - beide Sterne heiraten in weiß - STF 2449 ist ein schönes Doppel-Doppel zusammen mit dem 37' südlich stehenden STF 2446, wo die Komponenten einen ähnlichen Abstand haben
★★ STF2455 AB 7.4 9.4 9.6'' 28° 2015 Vul 19h06m53.00s +22°10'21.50"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x noch dicht beieinander, bei 64x gut getrennt - wie STF 2455 und der nahe STF 2457 (25' südlicher) sich gegenüberstehen und die jeweils schwächere Komponente in Richtung des anderen Doppelsterns vor sich herschiebt, das hat was - als ob die beiden Fußball spielen (die jeweilige Komponente A hat einen Ball vor den Füßen) - zwischen den beiden Doppelsternen steht ein schwacher Stern, vermutlich der verwirrte Schiedsrichter
Mark McCarthy
Fremont (California/USA)
317mm (277x) Yellow and yellow-orange, 1 delta mag, very wide.
★★ STF2457 7.5 9.5 10.2'' 201° 2015 Vul 19h07m08.02s +22°35'03.70"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x gut getrennt, bei 64x schon ein ordentlicher Abstand - wie STF 2457 und der nahe STF 2455 (25' nördlicher) sich gegenüberstehen und die jeweils schwächere Komponente in Richtung des anderen Doppelsterns vor sich herschiebt, das hat was - als ob die beiden Fußball spielen (die jeweilige Komponente A hat einen Ball vor den Füßen) - zwischen den beiden Doppelsternen steht ein schwacher Stern, vermutlich der verwirrte Schiedsrichter
Christopher Hay
Seeheim (Germany)
150mm (96x) Widely split. Attractive together in 0.8-degree FOV with Struve 2455AB a little less than half a degree south. The secondaries of the two doubles point towards each other, a nice sort of double-double. According to Stelledoppie 2457 is a physical double, while 2455AB is not. In 2457 the brightness of both components is less than those of 2455AB, their separation greater, and their colour contrast (itself hard to define) is greater. In 2455AB focussing on the A-component precisely is hard to achieve, perhaps due to an unresolved field star very close to it?
Mark McCarthy
Fremont (California/USA)
203mm (333x) Pale yellow stars, wide separation, 1.5 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (277x) White and orange, 1 delta mag wide.
STF2461, 17 Lyr AB 5.3 9.1 3.2'' 281° 2017 Lyr 19h07m25.58s +32°30'06.20"
Rene Merting
Drachhausen (Germany)
100mm (142x) nichts zu holen für mich bis 142x, vermutlich verhindert der große Helligkeitsunterschied die Trennung
Robert Zebahl
Leipzig (Germany)
152mm (129x) At 129x clearly split. The B component was just visible as pretty faint, tiny star. At 270x much easier visible.
Mark McCarthy
Fremont (California/USA)
317mm (553x) 17 Lyr. Yellow and red, much fainter B ~3 delta mag.
Mark McCarthy
Fremont (California/USA)
508mm (667x) 17 Lyr. Huge delta mag. B is obvious in 20", though A's diffraction was horrible. Used mask to clean it up but the B star momentarily disappeared, though I could eventually pull it back out with seeing and critical focus. 4 delta mag.
★★ STF2470 7.0 8.4 13.8'' 267° 2017 Lyr 19h08m45.20s +34°45'37.10"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 20x knapp getrennt - wunderschönes Synchrontänzer-Doppel-Doppel zusammen mit STF2474 unmittelbar 10' südlich, weil A und B bei beiden Paaren mit gleichen Helligkeiten und Positionswinkel strahlen - A-Komponente von STF2470 knapp schwächer als A-Komponente von STF2470
Robert Zebahl
Leipzig (Germany)
102mm (40x) Striking, especially with STF 2474 in one visual field. The color of the components was not clearly visible. Worthwhile! Sketch see STF 2474.
★★ STF2474 AB 6.8 7.9 15.9'' 264° 2018 Lyr 19h09m04.35s +34°35'59.90"
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 20x knapp getrennt - wunderschönes Synchrontänzer-Doppel-Doppel zusammen mit STF2470 unmittelbar 10' nördlich, weil A und B bei beiden Paaren mit gleichen Helligkeiten und Positionswinkel strahlen - A-Komponente von STF2474 knapp heller als A-Komponente von STF2470 - bei 64x Komponente A ein wenig gelblich
Robert Zebahl
Leipzig (Germany)
102mm (40x) Pretty conspicuous, easy double star. Especially attractive with the nearby double star STF 2470, as both are very similar in brightness, distance and position angle. The color of both components appeared slightly yellowish-orange. ../projects/doublestars/robert_zebahl/sketches/2019-06-26_stf2470_stf2474.jpg
Christopher Hay
Seeheim (Germany)
150mm (96x) Widely separated. Component A yellowish, B light ice-blue. A true physical pair in 171 LY distance. Very attractive in field of view together with Struve 2470 about 10 arcseconds north. The components of each of the two Struves have almost the same position angles, similar separations and very similar delta-magnitudes. Struve 2470 is like an echo of 2474 but with no definite colour impression.
STF2486 AB 6.5 6.7 7.1'' 204° 2018 Cyg 19h12m05.03s +49°51'20.70"
Robert Zebahl
Leipzig (Germany)
70mm (22x) At 22x barely split with a slight difference in brightness. At 44x the primary looked orange. I could not determine the color of the companion.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal yellow pair.
BU139, V338 Sge AB 7.1 8.0 0.6'' 136° 2017 Sge 19h12m34.45s +16°50'47.20"
Mark McCarthy
Fremont (California/USA)
203mm (667x) At the very best moments of seeing, which were fleeting, saw kissing disks to hairline split. Suspected elongation at 205x & 333x.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt, schwierig, 0,6"? ../projects/doublestars/frederik_wanink/sketches/BU139.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) V338 Sge. Overlapping airy disks.
★★ STF2496 AB 6.5 10.0 2.1'' 81° 2015 Cyg 19h15m19.18s +50°04'16.00"
AC 6.5 11.2 186.1'' 242° 2003
Robert Zebahl
Leipzig (Germany)
152mm (270x) AB: In steadier moments, the much fainter companion can be seen near the first diffraction ring of the primary component.
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Very much fainter B, a pin prick when seeing stills. 3 delta mag, ~2"
STF2505 AB 8.3 9.5 10.9'' 315° 2015 Lyr 19h19m52.83s +35°32'16.60"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x gut getrenntes Pärchen - Komponente B ist nur leicht schwächer als A - Komponente A ist nicht ganz weiß, mehr wie ein zarter Stich ins gelbliche
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and blue, looks like Alberio, but fainter. Wide separation.
★★ STF3132 AB 10.1 11.8 7.7'' 40° 2015 Vul 19h28m12.76s +20°12'59.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal orange stars with hairline split April 2019
★★★ beta Cyg, 6 Cyg, Albireo, STFA43 AB 3.2 4.7 34.7'' 55° 2018 Cyg 19h30m43.29s +27°57'34.90"
Robert Zebahl
Leipzig (Germany)
8x40 Well split, but I didn't recognised any color.
Rene Merting
Drachhausen (Germany)
10x50 Komponente A ist gleißend hell und stroh-gelb, Komponente B ist deutlich schwächer leicht abgesetzt von A erkennbar und strahlt eigenartig mint-grün
Robert Zebahl
Leipzig (Germany)
80mm (25x) One of the most beautiful double stars in the northern hemisphere. Differences in brightness and color (orange-blue) are brilliant! Even under urban conditions with small aperture an enjoyment!
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x stehen beide Sterne weit getrennt - Komponente A mit einem satten zitronen-gelb, Komponente B mit einem leichten Stich ins Blaue
Joerg S. Schlimmer
Germany
127mm (203x) easy to split ../projects/doublestars/joerg_schlimmer/sketches/Zeichnung_Albireo_filtered_96dpi_127mm.jpg
Joerg S. Schlimmer
Germany
305mm (170x) alle Komponenten einfach zu trennen ../projects/doublestars/joerg_schlimmer/sketches/Zeichnung_Albireo_filtered_96dpi_305mm.jpg
D20, V822 Aql AB 7.2 9.6 1.3'' 65° 1991 Aql 19h31m15.78s -02°06'36.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) A has a notched / trailing star in east PA – very close in and very much fainter. With seeing. Tough!
Mark McCarthy
Fremont (California/USA)
317mm (553x) tight airy disk of A, and a faint star widely separated, 3 delta mag ~25" Very near to a pretty orange carbon star.
★★ A598 AB 9.9 10.2 1.0'' 191° 2016 Cyg 19h36m29.82s +41°24'08.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) UV Cyg. Orange-red with very much fainter blue ~1", 1 delta mag. Seeing must still. A a perfect round disk the color of the setting sun. Very special.
★★★ HN 84 6.4 9.5 28.4'' 301° 2013 Sge 19h39m25.33s +16°34'16.00"
Rene Merting
Drachhausen (Germany)
16x70 beide Sterne präsentieren sich gut getrennt, nicht zu weit aber auch nicht zu nah - Komponente A meint es gut mit der Farbe gelb, bei Komponente B kann ich keine Farbe erkennen
Christopher Hay
Seeheim (Germany)
80mm (30x) Primary ruddy red, secondary wide apart but too faint for any colour impression. Straw-yellow Epsilon Saggitae half a degree to the west with its ice-blue eastern companion enhances the experience of colour contrast in the FOV and is actually more attractive than HN 84 with this aperture and power.
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 20x sind beide Komponenten weit getrennt - Komponente A auffällig gelb-orange, B dagegen grau-blau, ein schöner Farbkontrast, der sich bei 32x verstärkt
Christopher Hay
Seeheim (Germany)
150mm (96x) Main component ruddy tangerine orange, companion wide apart and ice blue. The longer I look the stronger the colour contrast becomes, which is by no means normal in many doubles. Epsilon Saggitae in same 0.8-degree field of view is straw-yellow with a cold blue companion (a field star?) pointing away from Epsilon in the direction of HN 84. I can’t think offhand of a better colour-contrast pair that can be framed in this manner in the same FOV.
★★ BU658, PS Vul 6.7 7.9 0.3'' 284° 1998 Vul 19h43m55.97s +27°08'07.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty orange star, subtly out of round / pear shaped. In a large cluster-like group of stars, around 3 degrees angular size, V-shaped, pretty in the finder. If the stars were brighter it would be as famous as the M45.
AGC10 AB 8.4 8.4 0.2'' 140° 2000 Aql 19h44m56.78s +10°46'30.60"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Wide split pair. I was trying for AB 0.2" which only suggested elongation, too marginal to claim success
Mark McCarthy
Fremont (California/USA)
508mm (410x) I can sense olive shape, very tough.
STF2579, delta Cyg, 18 Cyg AB 2.9 6.3 2.7'' 217° 2016 Cyg 19h44m58.44s +45°07'50.50"
Robert Zebahl
Leipzig (Germany)
70mm (200x) At 100x only indicated. At 200x the much fainter companion is visible as a slightly elongated brightening on the first diffraction ring.
Uwe Pilz
Leipzig (Germany)
105mm (288x) blauweiß ../projects/doublestars/uwe_pilz/sketches/190726DeltaCygni.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very bright white with ruddy B, ~4", 4 delta mag. Nice!
STF2583, pi Aql AB 6.3 6.8 1.4'' 106° 2018 Aql 19h48m42.05s +11°48'57.30"
Stefan Loibl
Rosenheim (Germany)
102mm (205x) not fully split, seen as constricted '8'
Robert Zebahl
Leipzig (Germany)
120mm (337x) At 100x elongated, at 200x seen as '8'. At 337x split in moments of good seeing, but still very tight. Overall the seeing was not so good.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) Helligkeitsunterschied erkennbar ../projects/doublestars/frederik_wanink/sketches/STF2583.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) 52, Pi Aql. Very definite split. A mini Alberio, gold and blue.
STT387 7.1 7.9 0.4'' 105° 2018 Cyg 19h48m43.81s +35°18'41.30"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) zeitweise als 8 zu sehen ../projects/doublestars/frederik_wanink/sketches/STT387.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) Red, very close pair? Seeing not supporting higher magnification. Marginal.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Overlapping disks, to a nearly hairline split with seeing. Half delta mag.
★★ STF2606 AB 7.7 8.4 0.7'' 147° 2018 Cyg 19h58m32.66s +33°16'38.80"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) sehr schwierig, Luftunruhe ../projects/doublestars/frederik_wanink/sketches/STF2606.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Hair split to clean split when seeing stills and there is only an airy disk. Near equal, half a delta mag. ~0.8"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Close pair 2 delta mag.
BU1133 6.7 9.9 1.1'' 342° 1991 Cyg 19h59m39.13s +31°49'35.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Tough find, dense field. Very temporary brightening in diffraction, 20% held. This is a tough one, <1" and large delta mag.
STT394 AB 7.1 10.3 11.1'' 294° 2015 Cyg 20h00m11.43s +36°24'50.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty orange and blue, well separated, 2 delta mag.
★★ SHJ314, V1676 Cyg AF 6.8 7.3 35.9'' 28° 2018 Cyg 20h05m57.32s +35°47'18.20"
AD 6.8 9.5 11.2'' 300° 2018
Rene Merting
Drachhausen (Germany)
100mm (32x) AD: bei 32x ist westlich von A knapp getrennt ein sehr schwacher Lichtpunkt erkennbar - mindestens 3 Größenklassen Helligkeitsunterschied zwischen A und D - zurück auf 20x sind beide Sterne auch noch ganz knapp getrennt erkennbar
Rene Merting
Drachhausen (Germany)
100mm (32x) AF: bei 32x sind zwei weit auseinander stehende Sterne erkennbar, Komponente F im Nordosten ist nur unwesentlich schwächer und strahlt nicht ganz so klar wie A
Uwe Pilz
Leipzig (Germany)
105mm (144x) liegt gemeinsam mit SHJ 315 im OC NGC 6871. Die Zeichnung des gesamten Haufens enthält nur die hellsten Sterne. ../projects/doublestars/uwe_pilz/sketches/190726shj314_315.jpg
★★ STF2675, kappa Cep, 1 Cep AB 4.4 8.3 7.2'' 120° 2003 Cep 20h08m53.32s +77°42'40.90"
Robert Zebahl
Leipzig (Germany)
55mm (38x) At 27x faint companion not visible. At 38x and higher magnification the companion is quite easily visible as faint, tiny star. Very nice, uneven pair!
Mark McCarthy
Fremont (California/USA)
508mm (333x) Bright white and 3 delta mag light orange B, well split.
★★ AC17 AB 6.2 10.6 4.4'' 82° 2015 Cyg 20h12m31.73s +51°27'49.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wow. Pretty orange-yellow and much fainter 3-4 delta mag B, resolves into view with seeing, just appears then vanishes if seeing quavers. ~4".
STFA50, omicron Cyg, 30 Cyg, 31 Cyg AD 3.9 4.8 336.7'' 322° 2016 Cyg 20h13m37.90s +46°44'28.80"
AC 3.9 7.0 108.6'' 173° 2016
Robert Zebahl
Leipzig (Germany)
naked eye AD: Well split with noticeable difference in brightness.
Robert Zebahl
Leipzig (Germany)
8x40 AD: Wonderful double star for binoculars. Large distance of the components, brighter once (31 Cyg) appeared slightly orange, the fainter (Cyg 30) more bluish.
Robert Zebahl
Leipzig (Germany)
8x40 AC: Observation at full moon. Easily split with big difference in brightness. Brighter component slightly orange. C component rather faint.
Robert Zebahl
Leipzig (Germany)
80mm (25x) AC: Similar to the observation with binoculars. C component appeared bluish and gave good contrast to the orange colored 31 Cyg.
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x sind alle drei Sterne weit getrennt und doch irgendwie zusammengehörend, Komponente A hellgelb, Komponente D strahlt weiß und die schwächste Komponente C schimmert bläulich, schöner Anblick
Robert Zebahl
Leipzig (Germany)
102mm (28x) Bright, wide apart and wonderful contrast in color. A: light yellowish-orange, C: blue, D: light blue. ../projects/doublestars/robert_zebahl/sketches/2019-08-22_omicron_cyg.jpg
STT403 AB 7.3 7.6 1.0'' 171° 2016 Cyg 20h14m21.53s +42°06'15.60"
Uwe Pilz
Leipzig (Germany)
105mm (288x) schwierig
Robert Zebahl
Leipzig (Germany)
152mm (270x) At 129x clearly elongated with constriction. At 270x clearly split, but very tight with almost touching diffraction disks. Visible, but very small difference in brightness. Inconspicuous color.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) schwaches 3er System, getrennt ../projects/doublestars/frederik_wanink/sketches/STT403.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Dramatic near equal white, just split, ~1", with a third in the system 2x fainter and wide separation (Indeed a triple, as described.)
Mark McCarthy
Fremont (California/USA)
317mm (553x) Dramatic near equal white, just split, ~1", with a third in the system 2x fainter and wide separation (Indeed a triple, as described.)
BU442 AB 9.7 8.0 18.7'' 103° 2015 Cyg 20h16m29.84s +37°38'35.40"
Rene Merting
Drachhausen (Germany)
100mm (32x) ein Zehnfachsternsystem mit 3 Sternen zwischen 8 und 10 mag und weiteren 7 Sternen zwischen 11 und 15 mag - bei 32x und genauer Betrachtung zeigt sich im Nordwesten von B die Komponente A, die etwa eine halbe Größenklasse schwächer ist als C - bei 107x ist erkennbar, dass A einen kleinen Ticken weiter von B entfernt steht als C
RST4659 AB 7.2 9.2 1.8'' 2015 Aql 20h16m50.26s -03°29'30.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White and 2-3 delta mag, ~2” B.
BU441 AB 6.4 10.5 6.2'' 64° 2015 Vul 20h17m31.54s +29°08'51.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange star with very faint bluish B seen with averted vision at first then can just hold. Needs fine focus.
STF2666 AB 6.0 8.2 2.7'' 246° 2013 Cyg 20h18m06.99s +40°43'55.60"
Christopher Hay
Seeheim (Germany)
150mm (96x) Observed at zenith in late July 2019. Clean split, B a fine speck of light to the south of the much brighter primary. Very charming, the highlight of that night’s double-star observing. Struve 2666 A is a member and the lucida of open cluster Collinder 419.
Mark McCarthy
Fremont (California/USA)
317mm (553x) White A, slightly red B, ~2 delta mag, ~4"
★★ BU1206 7.5 10.7 1.7'' 348° 2015 Cyg 20h19m07.08s +36°45'07.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very much fainter B, ~2", 3-4 delta mag. Pinpoint when seeing stills.
STF2673 AB 8.3 9.8 2.4'' 326° 2016 Del 20h22m43.76s +13°20'25.40"
Rene Merting
Drachhausen (Germany)
100mm (142x) bei 107x wird Komponente B nordwestlich von A blickweise sichtbar, noch nicht ganz getrennt die beiden - 142x reicht dann aber, um B sauber von A zu trennen - Helligkeitsunterschied eine Größenklasse (1,5 Größenklassen laut Stelle Doppie)
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint but well-split, ~3 disk separation. B ~2 magnitudes fainter. A is blue-green, B reddish.
STF2681 AB 8.0 10.6 6.8'' 39° 2015 Cyg 20h22m49.54s +53°25'02.80"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x gut getrenntes Pärchen, Komponente A nördlich strahlt doppelt so hell wie B im Süden, auf C nicht geachtet
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice. 3x fainter B, ~4", another wide pair below. (4 stars in system.)
★★ HO131 AB 7.0 10.6 3.4'' 334° 2015 Del 20h28m18.64s +18°46'10.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Seeing needed to be perfectly still so that A's diffraction disappeared. Then B would emerge from the dark as a very faint point to the NW, about 3 disks away.
★★ WEI35 AB 8.3 8.8 4.1'' 214° 2018 Cyg 20h29m13.54s +37°30'45.80"
AC 8.3 9.4 87.6'' 100° 2015
CD 9.4 10.6 12.1'' 201° 2015
Rene Merting
Drachhausen (Germany)
100mm (64x) AB: bei 64x ist ein schön eng stehendes Paar zweier schwacher Sterne erkennbar - Komponente B im Südwesten schwächelt helligkeitstechnisch nur um eine halbe Magnitude gegenüber A - Komponente A wirkt leicht farbig, das aber ist nicht greifbar
Uwe Pilz
Leipzig (Germany)
105mm (200x) eine anderer doppelter Doppelstern! Lohnend! Es ist erstaunlich, dass er nicht in den klassischen Katalogen auftaucht ../projects/doublestars/uwe_pilz/sketches/190726wei35.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Double-double! Near equal 3", and closeby a wider pair, 5", 1 delta mag. (AB is first, CD might be second? 4 stars visible in system)
BU63, 1 Del AB 6.2 8.0 0.9'' 347° 2016 Del 20h30m17.95s +10°53'45.30"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) schwierig ../projects/doublestars/frederik_wanink/sketches/1Del.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) 1 Delphini: 1 disk split to the NNW when seeing stills. A tough observation. 1 Del is a fascinating star that spins once in 0.9 earth days! See http://stars.astro.illinois.edu/sow/1del.html.
STT408 6.8 9.4 1.6'' 193° 2009 Cyg 20h34m01.96s +34°40'44.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very fine dull white A and pinpoint B, split well with seeing, ~2”
★★ ARY48 8.2 8.8 53.3'' 41° 2016 Cyg 20h37m45.00s +32°23'42.90"
Mark McCarthy
Fremont (California/USA)
80mm (13x) A beautiful split in finder, just equal pair, wide separation, white with red tint.
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x zeigt sich B fast gleichhell weit getrennt nordöstlich von A - bei 20x ein kleines schwaches ordentlich getrenntes Pärchen
STF2718 AB 8.3 8.4 8.6'' 88° 2015 Del 20h42m33.47s +12°43'41.90"
Rene Merting
Drachhausen (Germany)
100mm (32x) der Doppelstern steht sehenswert in einem Bogen aus 5 Sternen - bei 32x werden zwei gleich helle knapp getrennte Sterne sichtbar - schwer zu sagen, welches die A-Komponente ist - die westliche Komponente wirkt im Weiß-Farbton etwas kühler
Mark McCarthy
Fremont (California/USA)
317mm (553x) Same brightness white pair.
★★ 52 Cyg, STF2726 4.3 9.5 6.6'' 70° 2016 Cyg 20h45m39.76s +30°43'10.80"
Rene Merting
Drachhausen (Germany)
100mm (107x) bei 107x strahlt A gleißend und hellgelb, Komponente B ist östlich von A schön abgesetzt sehr schwach erkennbar - Helligkeitsunterschied riesig, bestimmt mehr als 4 Größenklassen (5.2 mag laut Stelle Doppie) - zurück auf 64x ist Komponente B nur in ruhigen Momenten zu erhaschen, der Stern klebt förmlich am hellen Strahlenkranz von A
Mark McCarthy
Fremont (California/USA)
317mm (277x) 52 Cygni: I sight this one by eye to find the Western Veil in the Telrad. Bright orange and 3 delta mag blue B, ~7”
★★ STF2725 AB 7.5 8.2 6.2'' 12° 2017 Del 20h46m13.31s +15°54'26.40"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein schöner Kontrast zum 15' nördlich stehenden viel helleren Sternpaar STF2727 - hier bei dem wesentlich schwächeren Sternpaar zeigt sich bei 32x die Komponente B knapp getrennt nördlich von A - Helligkeitsunterschied etwas mehr als eine halbe Magnitude, aber Komponente A ist noch deutlich schwächer als die Komponente B von STF2727
Uwe Pilz
Leipzig (Germany)
105mm (66x) im selben Feld mit gamma Del
Uwe Pilz
Leipzig (Germany)
105mm (88x) ../projects/doublestars/uwe_pilz/sketches/191030gammaDel.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) Near equal yellow-white stars, wide separation.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Super wide, 1 magnitude difference, both faint yellow-white.
Mark McCarthy
Fremont (California/USA)
508mm (333x) Easy, half delta mag and wide. I was after the super close WSI 110 Aa-Ab 0.1" but had no hope of seeing it.
Berthold Fuchs
Wiesbaden (Germany)
130mm close DS ../projects/doublestars/berthold_fuchs/photographs/STF 2725.png
★★ STF2727, 12 Del, gamma Del AB 4.4 5.0 8.9'' 266° 2018 Del 20h46m39.50s +16°07'27.40"
Christopher Hay
Seeheim (Germany)
15x45 Stabilised binoculars, handheld. A very elongated figure-8 very close to popping apart. According to Stelledoppie a physical double with a period of 3249 years. Observed in June 2019 when separation was 8,89“. Will be 8.67“ in 2030 according to Stelledoppie.
Christopher Hay
Seeheim (Germany)
18x80 Very tight pair but clearly split with black in-between. Observed in July 2019 when separation was 8,89“. An excellent object to test the resolution of large binoculars. Struve 2725 a few arcminutes to the southwest is a further good test object for magnifications >20x.
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x knapp getrennt - Komponente A ist schön gelb, B im Westen ist gut 1,5 Magnituden schwächer (lt. Stelle Doppie Helligkeitsunterschied nur 0.67 mag) - zusammen mit dem wesentlich schwächeren STF 2525 gut 15' südlich sehenswert
Uwe Pilz
Leipzig (Germany)
105mm (66x) im selben Feld mit STF2725 ../projects/doublestars/uwe_pilz/sketches/gammaDel.jpg
Uwe Pilz
Leipzig (Germany)
105mm (144x) schon trennbar bei 26x. In einem Feld mit STF2725 ../projects/doublestars/uwe_pilz/sketches/191030gammaDel.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) Gamma Delphinus. Rich gold-yellow A, blue-white B, ~6" separation estimated by eye. Very pretty pair.
STT413, 54 Cyg, lambda Cyg AB 4.7 6.3 0.9'' 2018 Cyg 20h47m24.53s +36°29'26.70"
Robert Zebahl
Leipzig (Germany)
102mm (280x) The diffraction disk of the primary component was slightly elongated towards north. The air here was however a bit too unsteady for an accurate observation.
Uwe Pilz
Leipzig (Germany)
105mm schwierig ../projects/doublestars/uwe_pilz/sketches/lambdaCyg.jpg
Robert Zebahl
Leipzig (Germany)
152mm (300x) The fainter component was visible as a permanent brightening of the first diffraction ring.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) schwierig aber getrennt ../projects/doublestars/frederik_wanink/sketches/LambdaCyg.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Lambda Cyg: ~1.5 delta mag, blue-white. Bright mess resolves to two disks 0.8-1.0”, with seeing.
★★ BU66 8.8 9.3 1.1'' 169° 2010 Vul 20h48m06.26s +27°27'25.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Exceedingly fine, elongated haze resolved to a clean split, half delta mag, with seeing. 1" Nice!
BU67 6.8 9.9 1.5'' 310° 2015 Cyg 20h50m36.05s +30°54'45.70"
Robert Zebahl
Leipzig (Germany)
152mm (270x) Not split.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pale blue A and 3 delta mag B, ~2”. In the middle of the Cygnus Loop.
STT420 6.7 10.5 5.5'' 2015 Cyg 20h54m22.25s +40°42'10.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Light yellow A and reddish B, very faint, very wide, 3 delta mag.
STT419 7.2 10.0 1.6'' 23° 2012 Cyg 20h54m42.00s +37°04'25.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Tough, needed to wait for a while for right seeing. Bright yellowish A with brightening in diffraction which stays put and recedes to a fine point momentarily with the seeing.
STF2735 6.5 7.5 2.0'' 281° 2011 Del 20h55m40.64s +04°31'57.70"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) Hauptstern leicht gelblich ../projects/doublestars/frederik_wanink/sketches/STF2735.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty orange and blue, Alberio-like, 2 delta mag, well split
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty gold and blue, close but well separated.
★★★ STF2742 7.4 7.6 2.9'' 215° 2017 Equ 21h02m12.51s +07°10'47.30"
Robert Zebahl
Leipzig (Germany)
70mm (57x) At 44x almost split with slight difference in brightness. At 57x split, but tight.
Rene Merting
Drachhausen (Germany)
100mm (64x) ähnlich wie STF 2765 und 2786 weiter nördlich wieder so ein knappes Pärchen bei 64x, das scheint Sternbild-typisch zu sein ;-) - beide Sterne sind fast gleich hell, der Stern im Nordosten ist minimal heller
Uwe Pilz
Leipzig (Germany)
105mm (94x) Prachtstück! Weiß-Weißgelb. ../projects/doublestars/uwe_pilz/sketches/190930STF2742.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) equal light orange, well split, pretty
Mark McCarthy
Fremont (California/USA)
317mm (553x) easy wide, equal brightness pair.
STF2747 8.4 8.7 4.6'' 267° 2018 Cyg 21h02m21.92s +37°39'14.00"
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 32x ein leicht verformter Stern, nicht ganz rund - bei 64x zwei gleich helle ganz knapp getrennte weiße Lichtpünktchen, schick - bei 107x wird die Trennung deutlicher, der südöstliche Stern strahlt einen kleinen Tick heller
Mark McCarthy
Fremont (California/USA)
317mm (553x) Light orange near equal, ~5"
BU69 AB 8.3 9.8 0.4'' 2017 Vul 21h02m36.08s +21°41'28.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) I sense overlapping disks at 553x, but marginal.
★★ BU445 AB 7.0 11.1 4.7'' 109° 2015 Cyg 21h03m29.53s +29°05'33.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange-red with exceptionally fainter B, only when seeing stills, else it is lost in the diffraction. Pinpoint. ~2”, 4 delta mag.
COU129 8.8 11.8 0.7'' 75° 2007 Vul 21h05m32.01s +24°33'51.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) I felt B flash momentarily with seeing, but marginal. Very tough one.
★★★ STF2758, 61 Cyg AB 5.2 6.0 31.8'' 154° 2018 Cyg 21h06m53.95s +38°44'57.90"
Christopher Hay
Seeheim (Germany)
15x45 Clear to wide separation. Both components of orange hue. Brighter northern component seemed to go slightly into yellow. In 10x42 also clearly split, northern component of orange hue, southern component of indeterminate colour (sky not quite dark enough at the time to see 61 Cyg naked-eye). Piazzi’s Flying Star, flying more than 5” per year to the northeast, and a true physical double with a period of 678 years.
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x sind beide Sterne gut getrennt, Komponente A strahlt in einem schmutzig-dunklem gelb, schwächere Komponente B leicht orange
Uwe Pilz
Leipzig (Germany)
105mm (200x) gelb und orange. Der weitere Stern im Bild ist TYC 3168-6781 ../projects/doublestars/uwe_pilz/sketches/191023_61Cygni.jpg
Uwe Pilz
Leipzig (Germany)
105mm (200x) TYC 3168-5901 kann dazu dienen, den sich ändernden Positionswinkel abzuschätzen. ../projects/doublestars/uwe_pilz/sketches/180901_61Cyg.jpg
Joerg S. Schlimmer
Germany
127mm (203x) Intensive Farbe ../projects/doublestars/joerg_schlimmer/sketches/Zeichnung_61_Cyg_filtered_96dpi.jpg
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/61 Cygni.png
HO151 9.7 10.0 1.6'' 17° 2016 Equ 21h10m55.45s +03°51'55.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint, hazy unresolved patch which, when the seeing stills, is pierced by two small pinpoints. Very firm, close but separated. Both stars bluish. Lies to the south of a brighter orange star.
HO153 8.5 9.6 1.0'' 128° 2016 Cyg 21h17m39.56s +33°45'29.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint, split with seeing, 1" 1 delta mag.
STF2786 7.5 8.2 2.8'' 189° 2016 Equ 21h19m39.36s +09°31'30.30"
Robert Zebahl
Leipzig (Germany)
70mm (57x) At 44x elongated, slightly notched. At 57x barely split with visible, but little difference in brightness.
Rene Merting
Drachhausen (Germany)
100mm (64x) bei 64x sind beide Komponenten ganz knapp getrennt erkennbar - Komponente A im Norden ist etwas heller als B
Uwe Pilz
Leipzig (Germany)
105mm (144x) ../projects/doublestars/uwe_pilz/sketches/190930STF2786.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pale yellow stars, B a slightly darker tint though 1 delta mag dimmer, well split
Mark McCarthy
Fremont (California/USA)
317mm (553x) Easy. near equal white.
★★ STF2789 AB 7.7 7.9 6.9'' 115° 2018 Cyg 21h19m58.84s +52°58'44.10"
Robert Zebahl
Leipzig (Germany)
70mm (44x) At 22x almost separated. The double star appeared strikingly orange and forms a conspicuous, nearly isosceles triangle with neighbouring stars. At 44x clearly separated, relatively close together with a small difference in brightness. ../projects/doublestars/robert_zebahl/sketches/2019-07-28_stf2789.jpg
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x zwei gleichhelle ganz dicht beieinander stehende weiße Lichtpünktchen, ganz knapp getrennt - wunderschön mit dieser Teleskopöffnung
STFB11, 1 Peg AB 4.2 9.3 35.8'' 311° 2017 Peg 21h22m05.13s +19°48'15.70"
Uwe Pilz
Leipzig (Germany)
105mm (88x) der helle Stern ist weiß. ../projects/doublestars/uwe_pilz/sketches/191014_1Peg.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) 1 Peg: Easy yellow-orange & wide separated B
A1892 8.2 9.3 0.8'' 351° 2016 Cyg 21h23m40.12s +55°17'38.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) When seeing stills disk resolves with pin point <1" split, very fine. 1 delta mag.
★★ HO603 AB 7.5 9.8 80.6'' 251° 2015 Cyg 21h32m04.61s +34°12'06.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and very wide separation bluish B
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very wide 2 delta mag, but B has a fainter close pair to it, seen with averted vision, about 3” separation (this is BC).
STF2804 AB 7.7 8.0 3.4'' 359° 2016 Peg 21h32m58.30s +20°42'44.50"
Robert Zebahl
Leipzig (Germany)
70mm (57x) Clearly split, pretty close, moderately uneven. The primary components looked slightly orange. Very nice pair.
Uwe Pilz
Leipzig (Germany)
105mm (88x) der südliche Stern ist einen Hauch heller. Gelb und orange. ../projects/doublestars/uwe_pilz/sketches/191014_STF2804.jpg
STF2816 AC 5.7 7.5 11.8'' 121° 2018 Cep 21h38m57.61s +57°29'20.50"
AD 5.7 7.5 19.9'' 339° 2018
Uwe Pilz
Leipzig (Germany)
105mm (200x) gehört zu einem Sternentstehungsgebiet ../projects/doublestars/uwe_pilz/sketches/stf2816.jpg
mu Cyg, 78 Cyg, STF2822 AB 4.8 6.2 1.6'' 321° 2018 Cyg 21h44m08.57s +28°44'33.40"
Uwe Pilz
Leipzig (Germany)
60mm (198x) Aufhellung innerhalb des ersten Rings
Robert Zebahl
Leipzig (Germany)
70mm (128x) At 128x I was able to see this double at least elongated.
Robert Zebahl
Leipzig (Germany)
200mm (171x) Quite well split with noticeable fainter component.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt ../projects/doublestars/frederik_wanink/sketches/STF2822.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and light orange pair, ~1", 1 delta mag. Very pretty, subtle colors
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow, 1 delta mag, 2-3”
STF2840 AB 5.6 6.4 17.7'' 197° 2018 Cep 21h52m01.02s +55°47'48.30"
Robert Zebahl
Leipzig (Germany)
55mm (25x) Striking double star with clear distance and difference in brightness.
Robert Zebahl
Leipzig (Germany)
70mm (22x) Striking, beautiful double star with visible difference in brightness. At 44x A appeared rather yellowish, B slightly blueish, whereby the colors were difficult to detect.
Rene Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein gut getrenntes Pärchen - Komponente B im Süden ist knapp eine Größenklasse schwächer - Komponente A wirkt weiß-gelblich, B eher gräulich - zurück auf 20x ist das Pärchen auch noch sehr ansehnlich, beide Sterne stehen schön dicht zusammen, die Trennung ist deutlich
★★ STF2841 A-BC 6.5 8.0 22.4'' 110° 2018 Peg 21h54m17.44s +19°43'05.30"
Robert Zebahl
Leipzig (Germany)
70mm (22x) At 22x easy to separate with considerable difference in brightness. The primary component appeared slightly yellowish-orange, the fainter component grayish-blue. The slight color contrast was especially visible at 44x.
Uwe Pilz
Leipzig (Germany)
105mm (88x) ../projects/doublestars/uwe_pilz/sketches/191014_STF2841.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange & blue, very wide separation, ~2 magnitude difference.
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF2841.png
BU694, V1942 Cyg AB 5.7 7.8 1.0'' 2016 Cyg 22h02m56.68s +44°38'59.80"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) schwieriger, Seeing schlecht ../projects/doublestars/frederik_wanink/sketches/BU694.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) 2 delta mag, just resolves, 1"
HO292 7.7 11.2 3.9'' 65° 2000 Peg 22h23m15.11s +05°38'47.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Extremely faint B, ~2", PA to north, seen with Averted vision only
delta Cep, STFA58 AC 4.2 6.1 40.7'' 192° 2018 Cep 22h29m10.25s +58°24'54.70"
Robert Zebahl
Leipzig (Germany)
55mm (27x) At 27x easy to separate, rather wide apart with clear difference in brightness. At 38x the colors are slightly better visible: A shines in bright orange, B appears rather gray-blueish.
Robert Zebahl
Leipzig (Germany)
80mm (25x) Obvious difference in brightness and color. Brighter component slightly orange, weaker bluish. Could be Albireo's little brother ;)
BU1092 AB 8.3 8.3 0.4'' 223° 2016 Cep 22h36m08.65s +72°52'51.10"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Notched! Near equal. With seeing.
★★ HO296 AB 6.1 7.2 0.4'' 44° 2017 Peg 22h40m52.71s +14°32'57.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Snowman. Light orange. Very tough
BU180 AB 8.0 9.2 0.5'' 134° 2016 Cep 23h07m09.99s +60°49'57.10"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Exceedingly fine split at best moments, hairline, 1 delta mag.
★★ BVD142 AB 7.8 10.3 80.0'' 165° 2018 And 23h10m29.28s +41°19'18.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange stars, 1 delta mag, well separated (finder split). B looks suspiciously like a pair -- but the transparency may be causing it to smear. This is quite an amazing catch considering the conditions! AB is as described 7.80/10.28 79.6". B is indeed a pair: TDT 3916 = BaBb, 10.69/11.41 0.6". Discovered in 1991 and only one observation!
★★★ TDT3916 Ba-Bb 10.7 11.4 0.6'' 89° 1991 And 23h10m31.15s +41°18'02.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange stars, 1 delta mag, well separated (finder split). B looks suspiciously like a pair -- but the transparency may be causing it to smear. This is quite an amazing catch considering the conditions! AB is as described 7.80/10.28 79.6". B is indeed a pair: TDT 3916 = BaBb, 10.69/11.41 0.6". Discovered in 1991 and only one observation!
STFB12, 91 Aqr A-BC 4.4 9.9 48.9'' 312° 2014 Aqr 23h15m53.50s -09°05'15.90"
Christopher Hay
Seeheim (Germany)
200mm (170x) According to Stelledoppie A and BC are a physical double, and B and C are in turn a tight physical double, hence a true triple system at a distance of 150 light years. A smaller aperture suffices to separate A-BC, but with 8 inches the fine colour contrast of A to BC presents nicely and the double dominates the 0.3° FOV. Very nice, for A is lemon-yellow, BC brick-red.
★★ STF2995 8.2 8.6 5.4'' 32° 2015 Psc 23h16m35.24s -01°35'11.40"
Rene Merting
Drachhausen (Germany)
100mm (64x) der Doppelstern liegt innerhalb des sehenswerten Sternmusters Posey 1 (Rocketship) - bei 64x ist Komponente B im Osten getrennt erkennbar - A ist nur unwesentlich heller, vielleicht eine viertel Magnitude
★★ STF3012 AB 9.5 9.8 2.9'' 190° 2016 Peg 23h27m33.16s +16°37'22.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) near equal brightness ~3" separation. Double double with STF 3021
★★ STF3021 AB 8.1 9.3 8.7'' 308° 2017 Peg 23h31m24.65s +16°13'07.60"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x zeigt sich B ganz knapp getrennt nordwestlich von A - Helligkeitsunterschied gut 2 Größenklassen - der Doppelstern bildet mit drei helleren Sternen eine flache Drachenraute
Mark McCarthy
Fremont (California/USA)
317mm (553x) ~3.5" and ~1 delta mag. Double double with STF 3012
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF3021.png
BU995 6.1 8.7 0.8'' 250° 2009 And 23h47m33.04s +46°49'57.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very fine 4 delta mag, <0.8"
STF3049, sigma Cas, 8 Cas AB 5.0 7.2 3.1'' 326° 2017 Cas 23h59m00.53s +55°45'17.80"
AC 5.0 10.4 106.0'' 66° 2014
Robert Zebahl
Leipzig (Germany)
70mm (120x) AB: At 57x barely separated, where the B component appears as a faint tiny star. At 120x the B component is clearly visible and slightly elongated on the first diffraction ring of the primary component. Very fine. ../projects/doublestars/robert_zebahl/sketches/2019-08-25_sigma_cas.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) AB: Begleiter gerade außerhalb des Beugungsrings
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB: White A to slight yellow B, 3-4", 1.5 delta mag.
STF3050 AB 6.5 6.7 2.5'' 342° 2018 And 23h59m29.33s +33°43'26.90"
Robert Zebahl
Leipzig (Germany)
55mm (83x) At 83x seen as '8'. From 100x to 166x seen as '8', temporarily visible with space between.
Robert Zebahl
Leipzig (Germany)
70mm (100x) Wonderful double star. Easy to split with slight difference in brightness.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) einfaches Paar, gleich hell ../projects/doublestars/frederik_wanink/sketches/STF3050.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) Nice near equal yellow-white, ~3"