Double Stars - Selection of Multiple Systems

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:

Complete List (Index)

Sketches (Index)
Photographs (Index)

Orbits (Index)

Double/Multiple Stars	3
Visual Observations	33
Sketches	14
Photographs	0
Observers	9
	Sarah Gebauer, Christopher Hay, Winfried Kräling, Stefan Loibl, Mark McCarthy, René Merting, Uwe Pilz, Frederik Wanink, Robert Zebahl

m₁

m₂

Year

Coordinates (J2000)

★★★

STF948, 12 Lyn

5m4

6m0

1.9''

64°

2019

Lyn

06h46m14.15s

+59°26'30.10"

5m4

7m0

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.
Robert Zebahl Leipzig (Germany)	63mm (140x)	AB: Components A and B split with almost no space in between. The difference in brightness was visible.
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.
Robert Zebahl Leipzig (Germany)	102mm (129x)	At 28x the pair AC is nicely separated without any problems. The close pair AB is already recognizable at 86x as a clear figure '8', at 125x wonderfully separated. The components A & B appear yellowish. Very nice view together with STF 946 in one field of view!
Uwe Pilz Leipzig (Germany)	105mm (88x)	im selben Feld mit STF 946
Robert Zebahl Leipzig (Germany)	152mm (129x)	At 49x the pair AC is beautifully separated with a significant difference in brightness. At 100x, the close pair AB is also separated, although still very close together. A slight difference in brightness is noticeable. At 129x, the view is magnificent. The two bright components A & B present themselves yellowish, the fainter component C rather greyish. STF 948 can be well observed in a field of view with the neighbouring double star STF 946. Both show a nice overall scenery.

★★★

STF1196 & HUT1, zeta Cnc, 16 Cnc

STF1196

5m3

5m8

6.3''

51°

2019

Cnc

08h12m12.79s

+17°38'51.20"

STF1196

AB-C

4m9

5m8

6.0''

64°

2018

STF1196

5m3

6m2

1.1''

9°

2018

HUT1

Ca-Cb

6m2

7m1

0.3''

233°

2018

Robert Zebahl Leipzig (Germany)	70mm (133x)	The wide pair AB-C is already separable at 22x. The pair AB shows at 133x two clearly overlapping diffraction disks with small difference in brightness, but without any notch.
Robert Zebahl Leipzig (Germany)	102mm (86x)	AB-C: Easy to separate. A: light grey, B: pale orange.
Stefan Loibl Rosenheim (Germany)	102mm (164x)	AB-C clearly split, AB obviously elongated but not split
Uwe Pilz Leipzig (Germany)	105mm (288x)	weißblau-gelb-gelb
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!
Winfried Kräling Marburg (Germany)	127mm (250x)	08.04.2018: Sehr schön, 3-fach Stern, A = weißgelb, B = weißgelb, C = weißgelb
Sarah Gebauer Germany	150mm (83x)	AB-C: bei 83x sind AB-C sauber getrennt, laut Atlas 2020 6,1'' Abstand, die Komponenten A und B mit 1,1'' lassen sich nicht trennen, viele schöne Feldsterne dabei
Frederik Wanink Itterbeck (Germany)	254mm (200x)	AB-C: AB (1,1") nicht bemerkt
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)	Ca-Cb: not quite round, oval/olive shaped. It is the AB-C of STF 1196.
Mark McCarthy Fremont (California/USA)	317mm (553x)	AB: Triple, all near equal magnitude, yellow-white. AB ~0.8", hair split.
Mark McCarthy Fremont (California/USA)	317mm (553x)	AC: Triple, all near equal magnitude, yellow-white. AC ~6", wide split.

★★★

STFA50, omicron Cyg, 30/31 Cyg

3m9

4m8

336.7''

322°

2016

Cyg

20h13m37.90s

+46°44'28.80"

3m9

7m0

108.6''

173°

2016

Robert Zebahl Leipzig (Germany)	naked eye	AD: Well split with noticeable difference in brightness.
Christopher Hay Seeheim (Germany)	3x63	Self-built binoculars, hence the unusual specification. Widely split, A (31 Cyg) light orange, D (30 Cyg) light blue.
Christopher Hay Seeheim (Germany)	7x50	A-D: Widely split, A (31 Cyg) luminous orange-red, D (30 Cyg) luminous ice-blue. C set off from A as a fine speck of light.
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.
Christopher Hay Seeheim (Germany)	15x45	A-D: Very wide apart but still perceived as belonging together. A (31 Cyg) orange-red, D (30 Cyg) ice-blue. C well set off from A and light ice-blue, like an echo of D. A delightful group of three for binoculars at this power, further accentuated by nearby orange Omicron2 Cygni. Both the brightnesses and colour hues of Omi1A and Omi2 appear practically identical.
René Merting Drachhausen (Germany)	18x70	wunderschön - Komponente A präsentiert sich buttergelb - die südliche, schwächste Komponente C zeigt sich aquamarinblau - D im Norden ist reinweiß und steht dreimal weitere entfernt wie AC
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.
René Merting Drachhausen (Germany)	100mm (32x)	bei 32x sind alle drei Sterne weit getrennt und doch irgendwie zusammengehörend, Komponente A ist rapsgelb und am auffälligsten, 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.
Sarah Gebauer Germany	150mm (30x)	die drei Komponenten plus Omicron2 bilden ein wunderschönes, sehr langes und spitzes Dreieck und zeigen dabei wundervolle Farben, Komponente A von o1 sowie o2 erscheinen schön gelblich, Komponente D von o1 hat einen deutlichen Blaustich im Weißen, wirklich ein sehr schönes Gesamtbild - auf Komponente C hatte ich nicht geachtet
Sarah Gebauer Germany	150mm (85x)	dieses Mal nur die drei dicht beieinanderstehenden Komponenten A, C und D im Sichtfeld gehabt, Komponente A ist wieder deutlich gelbgold, C wirkt leicht bläulich und Komponente D wirkt dieses Mal eher weiß