Double Stars - Complete List

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

Double Star Lists:

Complete List (Index)

Sketches (Index)
Photographs (Index)

Orbits (Index)

Double/Multiple Stars	2324
Visual Observations	3868
Sketches	357
Photographs	79
Observers	15
	Berthold Fuchs, Sarah Gebauer, Christopher Hay, Claus-Dieter Jahn, Gerd Kohler, Karsten Kopp, Jens Leich, Stefan Loibl, Mark McCarthy, Rene Merting, Uwe Pilz, John Raymond, Joerg S. Schlimmer, Frederik Wanink, Robert Zebahl

m₁

m₂

Year

Coordinates (J2000)

★★★

STTA254, WZ Cas

7m4

8m3

57.8''

89°

2018

Cas

00h01m15.85s

+60°21'19.00"

7m4

9m6

155.4''

324°

2015

7m4

10m3

181.4''

118°

2016

Rene Merting Drachhausen (Germany)	16x70	AB: ein schöner Fernglas-Doppelstern - Komponente A im Westen präsentiert sich dunkel-gelb (noch nicht orange), B im Osten ist eher weißlich
Robert Zebahl Leipzig (Germany)	80mm (33x)	AB: Nice double star. Brighter component appeared orange, the fainter more bluish.
Rene Merting Drachhausen (Germany)	100mm (20x)	AB: 20x reicht zwar schon für eine klare Trennung, aber Komponente B im Osten ist nur dumpf grau-blau und noch zu schwach für den schönen Farbkontrast, der sich bei 32x offenbart - Komponente A strahlt dann in einem satten Bernsteingelb, B im Osten gibt sich unterkühlt bläulich - Helligkeitsunterschied 1 bis 1.5 Größenklassen, schwierig abschätzbar wegen der Farben
Robert Zebahl Leipzig (Germany)	102mm (28x)	AB: Splendid view. Primary component clearly orange, secondary blue.
Joerg S. Schlimmer Germany	127mm (136x)	Sehr schöner Farbkontrast
Mark McCarthy Fremont (California/USA)	317mm (553x)	AB: WZ Cas: Pretty, deep orange A and very wide half delta mag B, white.
Rene Merting Drachhausen (Germany)	320mm (45x)	AB: bei 45x ein weit getrenntes Pärchen mit wunderschönen Farbkontrast, Komponente A im Westen ist grell-orange und die gut 1.5 Magnituden schwächere Komponente B ist aquamarin-grau

Robert Zebahl

Leipzig (Germany)

102mm

../projects/double-stars/robert-zebahl/photographs/2019-07-16_wz_cas.jpg

STF3053

6m0

7m2

15.0''

70°

2018

Cas

00h02m36.08s

+66°05'56.30"

Robert Zebahl Leipzig (Germany)	63mm (46x)	Easy to split with noticeable difference in brightness. Brighter component appeared slightly orange, fainter one bluish.
Rene Merting Drachhausen (Germany)	100mm (20x)	bei 20x knapp getrennt, Komponente B östlich ist halb so hell wie A - während Komponente A weiß-gelblich strahlt, zeigt B sich weiß mit einem leichten Stich ins bläuliche
Mark McCarthy Fremont (California/USA)	317mm (553x)	Pretty, orange and blue like Alberio. ~1.5 delta mag.

STF3051

7m7

9m5

16.8''

23°

2015

Cep

00h02m46.53s

+80°16'56.20"

Rene Merting

Drachhausen (Germany)

100mm (20x)

bei 32x ein ordentlich getrenntes Sternpaar, Komponente B im NO ist gerade so erkennbar, gut 1.5 Größenklassen schwächer als A und leicht gräulich - zurück auf 20x sind beide Sterne knapp getrennt zu erkennen

STF3054

8m1

9m1

33.6''

181°

2015

Psc

00h03m03.76s

+08°16'14.50"

Rene Merting

Drachhausen (Germany)

100mm (20x)

bei 20x ein sehr einfacher Doppelstern - Komponente B im Süden steht weit weg von A und ist gut eine Magnitude schwächer - bei 32x strahlt A warm-weiß, B dagegen wirkt matt-blau-grau

STF3055

7m3

10m3

5.7''

359°

2015

Peg

00h04m00.24s

+12°08'45.00"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Faint yellow-orange A with very small faint blue B to N, ~3" sep.

STT514

6m2

9m7

5.1''

170°

2015

And

00h04m36.60s

+42°05'33.20"

Rene Merting

Drachhausen (Germany)

100mm (64x)

bei 64x kommt Komponente B schwach zum Vorschein, Trennung ordentlich - vermutlich ist B für kleinere Vergrößerungen noch zu lichtschwach - bei 107x ist es dann leichter, die B-Komponente zu erfassen

STF3057

6m7

9m3

3.9''

298°

2015

Cas

00h04m54.98s

+58°31'55.80"

Rene Merting Drachhausen (Germany)	100mm (64x)	erst bei 64x wird die B-Komponente nordwestlich von A knapp getrennt schwach sichtbar (ich habe eher damit gerechnet) - bei 107x bleibt B schwach, Helligkeitsunterschied zu A mindestens zwei Größenklassen
Mark McCarthy Fremont (California/USA)	317mm (277x)	White with 2 delta mag blue-white B, 4-5".
Rene Merting Drachhausen (Germany)	320mm (144x)	bei 144x ein gut getrenntes Paar, bei der Komponente B im NW gut 2 Größenklassen schwächer strahlt - beide Sterne warm weiß

FOX103

6m2

10m7

13.1''

149°

2015

Peg

00h04m55.93s

+26°38'55.70"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Orange A. Very faint B to south, well separated.

BU997

7m6

9m4

3.8''

337°

2015

And

00h04m57.53s

+45°40'25.60"

Rene Merting Drachhausen (Germany)	100mm (64x)	knapp getrenntes Pärchen - großer Helligkeitsunterschied - schön zusammen mit dem unmittelbar östlich stehenden Doppelstern STT547
Mark McCarthy Fremont (California/USA)	317mm (553x)	Orange and blue, pretty, well separated.

BU9001

6m7

10m6

21.0''

235°

2016

And

00h05m09.75s

+45°13'44.50"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Faint companion, wide separation.

STT547

9m0

9m2

6.0''

190°

2018

And

00h05m41.03s

+45°48'43.30"

Rene Merting Drachhausen (Germany)	100mm (32x)	bei 64x klare Trennung - ein relativ schwaches Pärchen - zurück auf 32x stehen beide dichter zusammen und können knapp getrennt werden
Uwe Pilz Leipzig (Germany)	105mm (144x)	Der nahe gelegene ß997 konnte nicht getrennt werden

STF3061

8m4

8m5

7.8''

149°

2016

Peg

00h05m44.45s

+17°50'25.00"

Robert Zebahl Leipzig (Germany)	70mm (22x)	At 22x tiny pair with similarly bright, close components. Easy to separate at 44x. A small color difference was visible: The brighter component appeared somewhat warmer with a hint of orange, the fainter one slightly bluish.
Rene Merting Drachhausen (Germany)	100mm (32x)	bei 32x ein knapp getrenntes Pärchen - Komponente B im SO ist nur unwesentlich schwächer - beide weiß - ein schickes enges Paar
Mark McCarthy Fremont (California/USA)	317mm (553x)	Faint, but not too faint, near equal brightness, white, well separated.

Berthold Fuchs

Wiesbaden (Germany)

130mm

easy DS

../projects/double-stars/berthold-fuchs/photographs/STF3061.png

STF3060

9m3

9m7

3.4''

136°

2016

Peg

00h05m55.56s

+18°04'34.40"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Very close, ~3", equal brightness, pretty faint.

HU502

7m7

10m6

2.4''

108°

1991

Cas

00h05m57.04s

+49°37'20.40"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Hint of brightening, a bit of a smear in the diffraction. Marginal.

STF3062, V640 Cas

6m4

7m3

1.5''

3°

2018

Cas

00h06m15.81s

+58°26'12.50"

Robert Zebahl Leipzig (Germany)	152mm (129x)	Nice view, clearly split, but tight with visible difference in brightness.
Frederik Wanink Itterbeck (Germany)	254mm (460x)	leicht
Mark McCarthy Fremont (California/USA)	317mm (277x)	Light yellow and a more orange yellow B, 3-4", 1 delta mag. PC (70.07 L.Y.)
Rene Merting Drachhausen (Germany)	320mm (320x)	erst bei 320x ist Komponente B knapp getrennt nördlich von A zu erkennen - beide Sterne sind relativ hell und haben relativ große Beugungsscheibchen, so dass die Trennung nur knapp zu sehen ist - nicht wirklich schön, wenn man in den Nächten vorher mit einem Refraktor Doppelsterne beobachtet hat

BU483

7m0

7m7

158.5''

268°

2015

And

00h09m03.67s

+40°50'34.30"

Robert Zebahl

Leipzig (Germany)

8x40

Large distance with significant difference in brightness.

★

GIC2

7m8

11m5

29.7''

236°

2018

Peg

00h09m15.74s

+25°16'55.00"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

New designation to me: Harry Giclas, Lowell proper motion survey -- the man who hired Robert Burnham! Faint yellow-orange star with fainter and very wide companion. Possible 3rd to make a triangle. (AB seen, 4 stars in system)

★

STF2

6m7

6m9

0.9''

17°

2018

Cep

00h09m20.18s

+79°42'52.40"

Uwe Pilz Leipzig (Germany)	105mm (198x)	Schneemann-Figur. Abstand 0“91
Frederik Wanink Itterbeck (Germany)	254mm (640x)	getrennt

STF5, 34 Psc

5m5

9m4

7.6''

159°

2015

Psc

00h10m02.18s

+11°08'44.90"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Hard white A, very faint but definite small point B to south, 4x fainter.

STF3

7m8

9m1

5.0''

83°

2016

And

00h10m03.18s

+46°23'25.10"

Rene Merting Drachhausen (Germany)	100mm (64x)	bei 32x zeigt sich der Stern leicht länglich nach Osten verzogen - bei 64x knappe Trennung, Komponente B ist eine knappe Magnitude schwächer - A weiß, B grau-orange
Uwe Pilz Leipzig (Germany)	105mm (200x)

ARY8

8m1

8m6

39.1''

100°

2015

Cas

00h10m37.25s

+58°44'53.60"

Mark McCarthy

Fremont (California/USA)

80mm (13x)

There's a chain of doubles going south from Beta Cas, a pretty finder view, like stepping stones. The one closest to Beta Cas is Ary 8, which is actually a triple system of wide pairing.

STF7

8m0

8m5

1.3''

210°

2017

Cas

00h11m38.91s

+55°57'40.90"

Robert Zebahl Leipzig (Germany)	152mm (210x)	Clearly separated with rather close components. Slightly unequal. Pretty double.
Rene Merting Drachhausen (Germany)	320mm (240x)	bei 240x sind beide Sterne in guten Momenten knapp getrennt erkennbar - A und B wirken gleich hell

STT2

AB-C

6m3

10m4

18.0''

224°

2015

And

00h13m23.93s

+26°59'15.40"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Yellow A, well separated faint B

STF10

8m0

8m6

17.5''

176°

2015

Cas

00h14m49.33s

+62°50'25.50"

Rene Merting

Drachhausen (Germany)

100mm (20x)

20x reichen für die Trennung des schön isoliert im Sternumfeld stehenden Paares - Komponente B im Süden ist eine halbe Magnitude schwächer - bei 32x ein Kuriosum beim Farbkontrast für mich, der zwar sichtbar ist, aber nicht richtig greifbar - das Farbenspiel weiß und weißlich-orange scheint immer zwischen beiden ein wenig hin und her zu wechseln

★

STF12, 35 Psc

6m1

7m5

11.5''

148°

2018

Psc

00h14m58.84s

+08°49'15.50"

Robert Zebahl Leipzig (Germany)	70mm (22x)	At 22x pretty bright but uneven pair with relatively close components. At 44x the brighter component looked slightly yellowish, the fainter one slightly bluish. 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

6m2

9m8

9.1''

75°

2015

And

00h16m21.50s

+43°35'42.40"

Rene Merting

Drachhausen (Germany)

100mm (64x)

bei 64x ist Komponente B sehr schwach östlich von A erkennbar - großer Helligkeitsunterschied, kaum abschätzbar, vielleicht 3-4 Größenklassen - schönes Doppel-Doppel zusammen mit STT5 nur 28' östlich - beide Paare haben in etwa die gleichen Helligkeiten und den gleichen Abstand, nur die Positionswinkel sind verschieden

STF16

7m7

8m8

5.8''

40°

2019

Cas

00h16m41.65s

+54°39'36.50"

Mark McCarthy Fremont (California/USA)	317mm (553x)	White and blue-white, wide.
Rene Merting Drachhausen (Germany)	320mm (72x)	bei 45x knapp getrennt erkennbar - B im Nordosten ist gut 1.5 Größenklassen schwächer - bei 72 sind beide besser getrennt erkennbar, zudem zeigt sich jetzt ein schöner Farbkontrast. A ist weißgelblich, B ist blaugrau

★

BU392

5m7

12m5

19.5''

71°

2007

Cas

00h16m57.05s

+61°31'59.50"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Yellow A star. 12th mag B swims into view with averted vision and seeing, then can hold it direct as a bluish point.

★

STF22, 38 Psc

AB-C

7m1

7m7

3.9''

235°

2017

Psc

00h17m24.50s

+08°52'34.80"

AB-D

7m1

11m5

66.8''

151°

2005

Robert Zebahl Leipzig (Germany)	70mm (44x)	AB-C: At 44x separated with almost touching diffraction disks and small difference in brightness. At 57x clearly separated, but still quite close together. It stands in beautiful contrast to the nearby double star STF12 (35 Psc).
Mark McCarthy Fremont (California/USA)	317mm (553x)	AB-C: near equal white pair, well split, B ~1/2 delta mag, PA to SW.

★

ES41

8m0

11m2

6.3''

220°

2015

Cas

00h18m21.55s

+49°30'35.10"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

B appeared while putting my eye to the eyepiece -- then disappeared. B needs averted vision to see -- can barely hold it direct vision. Wide, 4 delta mag.

STF24

7m8

8m4

5.1''

247°

2017

And

00h18m30.59s

+26°08'25.10"

Robert Zebahl Leipzig (Germany)	70mm (66x)	Well split with visible difference in brightness.
Mark McCarthy Fremont (California/USA)	317mm (277x)	Near equal white ~5-6"
Mark McCarthy Fremont (California/USA)	317mm (553x)	Near equal brightness white star.

★★

STT5, 26 And

6m1

10m1

6.1''

240°

2016

And

00h18m42.15s

+43°47'28.10"

Rene Merting

Drachhausen (Germany)

100mm (64x)

Komponente B erscheint bei 64x knapp westlich von A und ist nur knapp sichtbar - extrem großer Helligkeitsunterschied - schönes Doppel-Doppel zusammen mit HJ1947 nur 28' weiter westlich, beide Paare haben in etwa die gleichen Helligkeiten und den gleichen Abstand, nur die Positionswinkel sind verschieden

KR4, V377 Cas

8m2

9m4

2.2''

180°

2015

Cas

00h19m14.30s

+59°42'17.40"

Rene Merting

Drachhausen (Germany)

100mm (142x)

bei 142x ist Komponente B nur in guten Momenten leicht abgesetzt südlich von A erkennbar - irgendwie habe ich mir den Doppelstern bei den Eckdaten leichter vorgestellt

S384

7m0

10m3

104.0''

22°

2015

And

00h20m00.41s

+38°13'38.60"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Widely separated, yellow-white A, 2 delta-mag fainter B.

★

AC1

7m3

8m3

1.9''

290°

2018

And

00h20m54.10s

+32°58'40.90"

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!
Uwe Pilz Leipzig (Germany)	105mm (200x)	orange. Leuchtend gelber Stern in 5' Abstand
Mark McCarthy Fremont (California/USA)	317mm (553x)	Tight yellow-white pair, near equal magnitudes.
Mark McCarthy Fremont (California/USA)	508mm (205x)	Orange star, slightly out of round.

STF26

AB-C

7m5

9m9

13.8''

114°

2015

Cep

00h21m22.17s

+67°00'19.50"

Rene Merting

Drachhausen (Germany)

100mm (32x)

bei 32x ein gut getrenntes Pärchen, aber trotzdem eine harte Nuss, weil die ost-südöstliche stehende Komponente C so schwach ist, dass sie nur mit viel Konzentration sichtbar wird bei dieser Vergrößerung - bei 64x dann ist das Erkennen von C leichter

STF27, 42 Psc

6m4

11m2

28.9''

315°

2015

Psc

00h22m25.48s

+13°28'56.90"

Mark McCarthy Fremont (California/USA)	317mm (553x)	Pretty, light orange star with a faint bluish B, widely separated.
Mark McCarthy Fremont (California/USA)	317mm (553x)	Orange, with wide separation blue B, PA to NNW, ~3 delta mag.

ES42

8m3

9m4

7.1''

207°

2015

Cas

00h22m51.76s

+54°19'44.00"

Rene Merting Drachhausen (Germany)	100mm (70x)	bei 70x ist indirekt der kleine Begleiter von Es 42 sichtbar
Rene Merting Drachhausen (Germany)	320mm (72x)	bei 72x ein eng stehendes, aber gut getrenntes Paar - Komponente B im Süden wirkt 2 Magnituden schwächer (nur 1.1 mag lt. Stelle Doppie)

STF28 & FYM12

STF28

8m3

8m6

33.2''

224°

2016

And

00h23m53.23s

+29°30'09.10"

FYM12

8m3

8m9

145.9''

137°

2016

Mark McCarthy Fremont (California/USA)	317mm (277x)	STF28 (AB): Near equal yellow A, white B, wide. A 3rd of similar magnitude in the field, could be part of the system? (it is FYM 12.)
Mark McCarthy Fremont (California/USA)	317mm (277x)	FYM12 (AC): Faint star, very widely separated from STF28 but in the same medium power field, forming a triple

STT9

6m9

9m7

2.1''

51°

2002

Cas

00h26m12.04s

+56°46'45.20"

6m9

9m9

22.8''

4°

2018

Mark McCarthy Fremont (California/USA)	317mm (277x)	AB: Very close, in diffraction, ~1.5". B is much fainter, ~3 delta mag, a pin prick resolved with seeing.
Mark McCarthy Fremont (California/USA)	317mm (277x)	AB: Interesting multiple system. Faint pairs on either side of a widely separated main pair, all in parallel PAs. (Quintuple. I saw AB through AE. C has a D pair which was not seen.)
Rene Merting Drachhausen (Germany)	320mm (72x)	AB: bei 72x wirkt Komponente A gelblich - auf B habe ich leider nicht geachtet AC: bei 144x ist Komponente C ordentlich entfernt im Norden von A erkennbar - C ist mindestens 2.5 Magnituden schwächer - auch bei 72x sind beide Komponenten mit ordentlich Abstand voneinander erkennbar

STF30

7m0

8m9

13.2''

316°

2018

Cas

00h27m12.45s

+49°59'08.60"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Obvious wide bright pair.

STT10

6m5

10m2

114.2''

240°

2015

Psc

00h27m31.02s

+16°01'31.70"

6m5

9m5

274.3''

156°

2015

10m2

14m3

152.8''

156°

2015

Mark McCarthy Fremont (California/USA)	317mm (553x)	AC: White A with ~3 delta magnitude B, very wide separation.
Mark McCarthy Fremont (California/USA)	317mm (553x)	AB: B a very wide separation to W, 4 delta mag

HJ322, 12 Cet

5m9

10m2

12.0''

202°

2015

Cet

00h30m02.35s

-03°57'26.30"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

Orange in finder. Bright orange A in scope, with very faint blue B, ~10" to south. Nice!

★

BU1095, 28 And

5m2

13m1

2.0''

16°

2008

And

00h30m07.34s

+29°45'06.10"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Very bright yellow- white A. B is a very faint but consistent point resolved just beyond the first diffraction ring when seeing stills.

BU1094

6m1

8m4

0.3''

290°

2009

Cas

00h30m19.91s

+59°58'39.20"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

No deformation noticed

★

BU394

8m5

8m8

0.8''

278°

2017

Cas

00h30m45.56s

+47°31'47.50"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Very fine, pop split with seeing, near equal.

STF33

8m8

8m9

2.8''

213°

2017

And

00h30m58.47s

+34°05'53.90"

Robert Zebahl

Leipzig (Germany)

70mm (128x)

Components equally bright, easy to split.

HJ1981

A-BC

6m9

8m4

78.4''

89°

2015

Cet

00h30m59.89s

-10°05'04.90"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

White pair, PA to east, ~2 delta mag.

HJ5451

6m0

9m3

55.3''

86°

2012

And

00h31m25.64s

+33°34'53.90"

Uwe Pilz Leipzig (Germany)	105mm (88x)	gelbweiß, schon bei 21x erkennbar
Mark McCarthy Fremont (California/USA)	317mm (553x)	Orange, pretty bright star, bluish / fainter widely separated B

STT12, lam Cas

5m3

5m6

0.2''

210°

2010

Cas

00h31m46.32s

+54°31'20.30"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Lambda Cas: Maybe out of round? Marginal

★

BU1227

7m2

10m6

2.8''

193°

2015

Cas

00h32m21.78s

+58°20'19.10"

7m2

11m8

22.4''

80°

2015

7m2

11m7

30.9''

112°

2015

Mark McCarthy Fremont (California/USA)	317mm (553x)	AB: Yellow and 3 delta mag B, orange, comes into view direct vision but only with seeing, 2-3".
Mark McCarthy Fremont (California/USA)	317mm (553x)	AC: Faint star, 1 delta mag fainter than B, widely separated, PA 90 degrees from AD
Mark McCarthy Fremont (California/USA)	317mm (553x)	AD: Faint star, 1 delta mag fainter than B, more widely separated than C, at 90 degrees PA from C

STF36, 51 Psc

5m7

9m5

27.0''

84°

2018

Psc

00h32m23.75s

+06°57'19.60"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

51 Psc. Bright white A and 3 detla mag B, wide

STF39

AB-C

7m1

8m7

20.1''

45°

2018

Cet

00h34m29.79s

-04°32'47.50"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

Yellow and blue pair, PA to NE. Pretty.

STF40

6m7

8m5

11.8''

313°

2018

And

00h35m09.63s

+36°49'56.20"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Pretty yellowish star with fainter, widely separated B.

H5 17, pi And

4m4

7m1

35.8''

174°

2018

And

00h36m52.84s

+33°43'09.70"

Uwe Pilz

Leipzig (Germany)

105mm (88x)

(HV 17) blauweiß und violett-grau

../projects/double-stars/uwe-pilz/sketches/191122HV17.jpg

STF45

6m8

10m1

19.1''

91°

2015

Cas

00h38m41.60s

+46°57'24.60"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Easy wide orange and blue, 3 delta mag.

STT16

5m6

10m5

12.3''

22°

2015

Cas

00h39m09.89s

+49°21'16.50"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

wide and faint.

HJ1986

8m0

8m5

40.3''

67°

2018

Cep

00h39m35.16s

+84°44'52.00"

8m0

11m2

55.8''

189°

2015

Rene Merting Drachhausen (Germany)	100mm (32x)	AB: bei 32x sehr weit getrenntes Pärchen - beide Komponenten ähnlich hell, Komponente A im SW weiß, B eine halbe Größenklasse schwächer und mehr gräulich - zurück auf 20x sind beide weiterhin weit getrennt erkennbar
Rene Merting Drachhausen (Germany)	320mm (45x)	AB: bei 45x sehr einfach - Komponente B im NO ist maximal eine halbe Größenklasse schwächer - Komponente A weißorange AC: bei 45x zeigt sich C im Süden von A als ganz schwaches Lichtpünktchen - Abstand zu A etwas größer als der von AB - alle drei Sterne zusammen bilden ein flaches Dreieck, A ist die Spitze mit dem flachen Winkel

STF46, 55 Psc

5m6

8m5

6.6''

195°

2015

Psc

00h39m55.57s

+21°26'18.60"

Robert Zebahl Leipzig (Germany)	70mm (44x)	Clearly separated, but large difference in brightness. The companion appeared only as a tiny, faint star. The primary component sparkled in light orange.
Mark McCarthy Fremont (California/USA)	317mm (553x)	Orange with wide separated blue B.

STF47 & BU1348

STF47

7m2

8m8

16.6''

205°

2015

And

00h40m19.78s

+24°03'14.00"

BU1348

7m2

11m1

46.5''

233°

2015

Mark McCarthy Fremont (California/USA)	317mm (553x)	STF47 (AB): Easy, a triple. Orange A star with 1.5 delta mag. B, 10". Third star another 1 delta mag, further out in a similar PA. Third star is BU 1348
Mark McCarthy Fremont (California/USA)	317mm (553x)	BU1348 (AC): The third star out, paired with both A and B of STF 47 -- pretty weird orbit, trying to picture it

BU1349 & H5 18, alpha Cas, 18 Cas, Shedir, Schedar

BU1349

2m4

14m0

24.8''

280°

2014

Cas

00h40m30.39s

+56°32'14.70"

BU1349

2m4

13m0

30.6''

104°

2014

H5 18

2m4

9m0

70.4''

283°

2018

Rene Merting

Drachhausen (Germany)

320mm (45x)

AD: bei 45x strahlt Komponente A herrlich strohgelb, D steht ganz schwach weit abgesetzt westlich von A

STF48

7m8

8m1

5.5''

334°

2016

Cas

00h42m40.01s

+71°21'57.30"

Robert Zebahl

Leipzig (Germany)

70mm (57x)

At 22x almost split, clearly elongated, notched. At 31x split, but very close together, almost equally bright. At 57x easily separable with very small difference in brightness. The fainter companion appeared slightly orange.

HJ1995

6m7

11m3

42.8''

128°

2017

Cet

00h42m50.76s

-09°55'17.90"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

Fairly faint B, wide and just above averted vision threshold. PA to east.

STF55

8m3

8m9

2.3''

331°

2016

And

00h44m22.95s

+33°37'05.60"

Robert Zebahl

Leipzig (Germany)

70mm (128x)

Well split with noticeable difference in brightness.

ARG2

7m9

9m8

2.3''

46°

2013

Cas

00h45m50.79s

+54°58'40.80"

Rene Merting

Drachhausen (Germany)

320mm (144x)

bei 144x ist die B-Komponente ganz knapp getrennt nordöstlich von A erkennbar - B ist mehr als eine Größenklasse schwächer - die Beugungsscheibchen berühren sich fast noch - schön ist anders

STFA1

7m2

7m4

47.8''

47°

2018

And

00h46m24.34s

+30°56'33.50"

Robert Zebahl Leipzig (Germany)	8x40	Large distance with visible difference in brightness. I used a tripod.
Uwe Pilz Leipzig (Germany)	105mm (26x)	zweiter Doppelstern im Bild (ohne Bezeichnung). Gelb und orange.
Mark McCarthy Fremont (California/USA)	317mm (277x)	equal magnitude orange pair, wide.

H5 82

8m0

8m3

56.8''

75°

2018

Cas

00h47m24.62s

+51°05'45.90"

Rene Merting Drachhausen (Germany)	12x50	ein ansehnliches Sternpaar, in der unmittelbaren Umgebung gibt es keine konkurrierenden Sterne - beide Komponenten stehen dicht zusammen und sind etwa gleich hell
Robert Zebahl Leipzig (Germany)	70mm (26x)	Almost equally bright components with large angular distance.

STF59

7m2

8m1

2.4''

151°

2018

Cas

00h47m59.03s

+51°26'41.20"

Robert Zebahl

Leipzig (Germany)

70mm (100x)

At 57x elongated, at 100x barely, at 128x clearly split with noticeable difference in brightness.

HO306

9m6

9m9

1.5''

159°

2016

And

00h48m06.71s

+25°32'54.30"

Robert Zebahl

Leipzig (Germany)

102mm (160x)

Pretty faint and tight with visible difference in brightness.

★★★

eta Cas, 24 Cas

STF60

3m5

7m4

13.4''

326°

2019

Cas

00h49m06.29s

+57°48'54.70"

STF60

3m5

11m4

225.0''

260°

2000

STF60

3m5

12m8

189.4''

354°

2011

STF60

3m5

10m2

75.6''

126°

2015

STF60

3m5

11m5

378.3''

276°

2000

STF60

3m5

9m5

419.7''

259°

2012

STF60

3m5

8m4

701.1''

355°

2012

SMR2

3m5

11m6

90.3''

73°

2012

SMR2

3m5

12m3

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 13,4" 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!
Sarah Gebauer Germany	150mm (54x)	AB: bei 54x erst nur einen Stern gesehen, doch da, ganz schwach darunter doch die wesentlich schwächere, zweite Komponente entdeckt
Mark McCarthy Fremont (California/USA)	317mm (553x)	AB: Nice yellow pair. A is a red tainted yellow, B is cleaner.
Rene Merting Drachhausen (Germany)	320mm (72x)	AB: bei 72x ein echt fetter Farbkontrast, Komponente A ist gleißend hell und zitronengelb, B zeigt sich knallig orange - beide Sterne sind gut getrennt voneinander zu beobachten - sehenswert

STI1437

9m7

11m0

11.1''

299°

2015

Cas

00h49m32.95s

+55°33'54.40"

Mark McCarthy

Fremont (California/USA)

203mm (533x)

Obvious pair, wide, ~15" or so, one delta mag [not physical]

★

65 Psc, STF61

6m3

4.3''

116°

2018

Psc

00h49m52.88s

+27°42'38.90"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

Bright orange pair, 6-7"

★

BU232

8m5

8m8

0.9''

256°

2018

Cas

00h50m25.10s

+50°37'49.60"

AB-C

8m5

10m1

24.5''

300°

2018

Mark McCarthy Fremont (California/USA)	203mm (533x)	AB: Nice, well split, near equal. Part of a triple, the next one much wider in same PA and two delta mag. [AB-C is 10.06 24.5"]
Mark McCarthy Fremont (California/USA)	317mm (553x)	AB: Neat near equal orange and yellow. Split with seeing, 1".
Mark McCarthy Fremont (California/USA)	317mm (553x)	AB-C: C 2 delta mag fainter than B, about 25" separated, is the +1 star with BU232AB

★

MLR27

10m2

0.5''

212°

2008

Cas

00h51m10.71s

+60°18'54.20"

Mark McCarthy

Fremont (California/USA)

508mm (1067x)

Split with seeing, tremulous in turbulence but does split when settled. Noticeable delta mag.

BU781

8m4

9m3

1.0''

22°

2017

Cas

00h51m36.19s

+68°59'14.00"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Very fine faint pair, need to wait for seeing. 1", 1 delta mag.

A812

7m7

11m1

1.8''

327°

2017

Cas

00h51m47.06s

+48°03'23.60"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Orange star, suspect a brightening in diffraction when seeing stills, marginal.

★

STF65

8m0

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

8m6

9m3

1.5''

83°

2016

Cas

00h52m49.22s

+56°37'39.50"

8m6

8m9

3.9''

134°

2017

8m6

9m7

9.0''

194°

2017

8m6

12m1

15.8''

333°

2015

8m9

9m7

7.8''

220°

2016

Robert Zebahl Leipzig (Germany)	70mm (57x)	AC: Easy to split with little difference in brightness.
Robert Zebahl Leipzig (Germany)	70mm (57x)	AD: Relatively large angular distance with obviously fainter component.
Mark McCarthy Fremont (California/USA)	317mm (553x)	AB: In the finder there is a right triangle of equal stars, the foot star has a very faint, 2-3 delta mag star very close ~1", faint split. Some fainter stars wreathed about it. AC and AD appear to be the other triangle stars. 17 stars visible in the system, which I suppose ought to be called an open cluster
Mark McCarthy Fremont (California/USA)	508mm (533x)	AB: L shape asterism and the short end tip star has a faint close star, AB. There's a zigzag of four faint stars making an arc beyond this short L. Given this is really an open cluster this is not surprising. [not physical]

STI1460

9m2

12m9

9.6''

92°

2015

Cas

00h52m55.81s

+55°20'16.90"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

B is a faint star, pretty wide, unremarkable [not physical]

BU497

4m8

9m8

146.0''

170°

2015

Cas

00h53m04.28s

+61°07'24.80"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Super wide and faint.

STF70

6m3

9m5

8.1''

247°

2015

Cas

00h53m47.53s

+52°41'21.60"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Yellow-white A and widely separated B, a small point, 3 delta mag

HU1018

9m9

10m3

0.9''

58°

2015

Cas

00h54m14.98s

+51°08'12.00"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Excellent pair, near equal, ~1", very fine

★

A1258

9m7

9m9

0.6''

202°

2018

Cas

00h54m23.37s

+54°31'41.00"

Mark McCarthy

Fremont (California/USA)

508mm (1067x)

Yes! I got it split, what a sight! Suspected at 533x. Reddish A, 1 delta mag brighter than blue B. Perfect star images. Nice color pair

STF72

8m4

9m3

23.3''

173°

2015

And

00h54m37.50s

+39°10'09.70"

Robert Zebahl

Leipzig (Germany)

152mm (22x)

Easy with moderate difference in brightness. Both components appeared orange, the fainter one slightly more intense. The color was well visible at 69x.

★

HU802

7m8

10m0

0.4''

222°

2008

Cas

00h54m53.84s

+49°24'18.90"

Mark McCarthy

Fremont (California/USA)

508mm (1067x)

Hairline split to overlapping, 1 delta mag, super fine

★

STF73, 36 And

6m1

6m5

1.1''

334°

2018

And

00h54m58.02s

+23°37'42.40"

Robert Zebahl Leipzig (Germany)	102mm (125x)	Clearly visible as figure '8' with a rather small difference in brightness.
Uwe Pilz Leipzig (Germany)	105mm (198x)	ganz einfach
Robert Zebahl Leipzig (Germany)	152mm (300x)	Split with little gap in between and little difference in brightness. Seeing was not really good.
Frederik Wanink Itterbeck (Germany)	254mm (640x)	hell

BU1098, ups 1 Cas

5m0

12m5

18.0''

63°

2015

Cas

00h55m00.19s

+58°58'22.10"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Bright yellow and very much fainter 4 delta mag B

★

TDS1665

10m5

0.5''

30°

2015

Cas

00h55m08.24s

+57°13'30.80"

Mark McCarthy

Fremont (California/USA)

508mm (1067x)

Can tell is double, elongated, and I got one split in ten seconds, seeing needs to be perfect

TDS1667

10m6

0.6''

296°

2007

Cas

00h55m25.53s

+59°50'59.90"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Pretty well split once it resolves out of the haze into two near equal points

ES405

10m2

10m4

4.4''

117°

2016

Cas

00h55m41.89s

+57°47'06.10"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Pretty, near equal white stars, wide separation

★

TDS1670

11m6

0.7''

26°

2015

Cas

00h55m57.82s

+58°32'38.90"

Mark McCarthy

Fremont (California/USA)

508mm (1067x)

Rather wide, well split with seeing, bluish stars due to faintness. Very nice pair

ES940

7m3

10m1

61.7''

359°

2015

Cas

00h57m20.19s

+52°14'23.70"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Orange A with very faint pin prick B, with seeing, 3 delta mag, wide.

HLD4

9m0

9m5

0.3''

38°

2007

Cas

00h57m35.79s

+54°23'44.80"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Yellowish stars, nicely split, a near equal. [this pair is widening, will get a little easier, was 1" at discovery in 1881 -- Holden, Lick director.]

S390

7m8

7m9

6.5''

216°

2016

Cet

00h58m09.75s

-15°40'58.00"

Rene Merting

Drachhausen (Germany)

100mm (32x)

bei 32x eine schöne Erdnuss, sprich zwei gleichhelle Sterne, die nur in guten Momenten knapp getrennt erscheinen - die Trennung ist dann eindeutiger bei 64x

164 And, STF79

6m0

6m8

7.9''

195°

2018

And

01h00m03.56s

+44°42'47.70"

Robert Zebahl

Leipzig (Germany)

55mm (25x)

Beautiful double star, relatively tight with visible difference in brightness.

★

ES45

6m6

10m8

7.9''

244°

2015

Cas

01h01m27.04s

+49°32'39.10"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Orange-yellow A, need averted vision to flash B out, barely hold with direct vision.

★

A2901

7m1

7m8

0.4''

64°

2018

Cas

01h01m30.15s

+69°21'30.70"

Mark McCarthy

Fremont (California/USA)

317mm (885x)

Elongated to notched with seeing

★

BU396

6m1

8m6

1.3''

67°

2007

Cas

01h03m37.01s

+61°04'29.40"

Mark McCarthy Fremont (California/USA)	317mm (340x)	Bright white and 3-4 delta mag blue, ~2", well split.
Mark McCarthy Fremont (California/USA)	317mm (553x)	Suspected in 277x, confirmed split with 553x, Small much fainter blue B in A's diffraction -- yellow-white, ~1", ~3 delta mag.

STF84, 26 Cet

6m1

9m5

16.0''

253°

2015

Cet

01h03m49.02s

+01°22'00.60"

Mark McCarthy Fremont (California/USA)	317mm (553x)	Yellow A and bluish B. PA west, 2 delta mag. Wide separation.
Mark McCarthy Fremont (California/USA)	317mm (553x)	Pale yellow and almost dark purple B, 2 delta mag, ~15"

★★

STF88, psi 1 Psc

5m3

5m5

29.2''

160°

2018

Psc

01h05m40.93s

+21°28'23.60"

Rene Merting Drachhausen (Germany)	10x50	ein etwas mehr als knapp getrenntes Pärchen zweier gleichheller Sterne
Rene Merting Drachhausen (Germany)	16x70	ein ordentlich getrenntes helles Sternpaar, die südliche B-Komponente wirkt etwas weniger weiß - schöner Anblick
Christopher Hay Seeheim (Germany)	18x80	Psi1 Psc is well separated. Very strong visual presence in this instrument. Components almost identically bright, colourless. Strongly supplemented to the south in 4° field of view by Psi2, Psi3 and Chi. Field relatively empty to the north, which gives the field further tension. According to Stelledoppie a true physical double 275 light years distant.

STF90, 77 Psc

6m4

7m3

32.7''

84°

2018

Psc

01h05m49.22s

+04°54'31.20"

Christopher Hay Seeheim (Germany)	15x45	Widely split. Very reminiscent in PA and delta-Mag of the pair Zeta Psc (STF100) 3° to the north, but is wider, weaker and thus overall more pleasant in this instrument.
Mark McCarthy Fremont (California/USA)	317mm (553x)	Very easy white-yellow pair, ~0.5 delta mag, wide PA to the east.

S393, sig 2 Psc

6m4

10m6

60.0''

295°

2014

Psc

01h06m11.20s

+32°10'53.30"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

Orange-yellow A, 2 delta mag very wide B

STTA11

AB-C

7m6

8m8

59.3''

164°

2014

And

01h07m09.16s

+38°39'01.70"

Robert Zebahl

Leipzig (Germany)

152mm (22x)

Pretty wide pair with moderate difference in brightness. At 69x the primary component appeared slightly orange, BC rather greyish.

STF91

7m4

8m6

4.3''

315°

2018

Cet

01h07m10.99s

-01°43'55.60"

Mark McCarthy Fremont (California/USA)	203mm (333x)	Well separated 1.5 delta mag, white stars
Mark McCarthy Fremont (California/USA)	317mm (553x)	Orange-yellow pair, ~2 delta mag, ~4", PA to N.
Mark McCarthy Fremont (California/USA)	317mm (553x)	Pale yellow and pale orange pair, wide separation, PA to the WNW.

BAR1, bet And

2m2

13m0

108.4''

276°

2015

And

01h09m43.92s

+35°37'14.00"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

EE Barnard recorded eight faint stars, ranging from 10.7 to 14.4 mangnitude, surrounding Beta Andromadae. As a bonus, galaxy NGC 404 "Mirach's Ghost" is in the same near area. I found seven using magnifications of 201x to 553x, moving Beta in and out of the field.

STT23

8m1

8m6

14.5''

191°

2015

Cas

01h10m07.56s

+51°44'48.20"

Rene Merting

Drachhausen (Germany)

320mm (72x)

bei 72x sehr auffällig - zwei eng zusammen stehende gleich helle Sterne in nordsüdlicher Ausrichtung - im Umfeld stehen weitere gleich helle Sterne, die stehen aber nicht so schön zusammen wie die beiden Protagonisten von STT23

BU235

Aa-Ab

7m5

7m8

0.8''

143°

2018

Cas

01h10m34.31s

+51°00'47.80"

Frederik Wanink

Itterbeck (Germany)

254mm (640x)

Mehrfachsystem

../projects/double-stars/frederik-wanink/sketches/BU235.jpg

HJ634

7m3

12m7

56.3''

236°

2015

Psc

01h10m54.28s

+09°33'50.00"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

Yellow-orange with faint wide B to west, ~3 delta magnitude.

STT553, the Cas

4m3

11m3

126.4''

143°

2012

Cas

01h11m06.16s

+55°08'59.60"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Super wide and faint.

HO215, 45 And

6m6

0.1''

225°

2006

And

01h11m10.29s

+37°43'26.90"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

45 And: Disk seems not round but far for me to claim it, marginal observation

★

STF96

7m9

8m9

0.9''

287°

2018

Cas

01h12m41.24s

+65°00'32.90"

Frederik Wanink Itterbeck (Germany)	254mm (640x)	scheint enger als 0,9"
Mark McCarthy Fremont (California/USA)	317mm (553x)	Mostly notched but moments of hairline split with seeing 1.5 delta mag. Very tough! Yellow-orange stars.

STF98

7m0

8m1

20.0''

250°

2018

Psc

01h12m52.98s

+32°04'31.70"

Robert Zebahl Leipzig (Germany)	70mm (22x)	Easy to separate at 22x, clear difference in brightness at moderate distance. In terms of color, the two components appeared slightly different. At 44x A appeared white-yellowish, B slightly reddish.
Uwe Pilz Leipzig (Germany)	105mm (288x)	nicht einfach
Mark McCarthy Fremont (California/USA)	317mm (277x)	Yellow-orange and 1 delta mag B. Could be a multiple system: some stars on other side of A making a triangle, 2-3 times fainter. (4 stars in system).
Mark McCarthy Fremont (California/USA)	317mm (553x)	1 delta mag, wide separation. White A, blue B.

STT26

6m3

10m5

10.7''

258°

2015

Psc

01h12m59.47s

+30°03'51.20"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

Orange with much fainter B ~10" to south.

★

BU258

6m5

8m8

1.6''

263°

2015

Cas

01h13m09.82s

+61°42'22.30"

Mark McCarthy Fremont (California/USA)	317mm (553x)	Barely split at 340x, a brightening in the first diffraction. Wanted more certainty so went to 553x, clean split, 2" 3 detla mag.
Mark McCarthy Fremont (California/USA)	317mm (553x)	White pair, B resolves with seeing, ~2", 2-3 delta mag.

★

zeta Psc, 86 Psc, STF100

5m2

6m3

23.2''

63°

2018

Psc

01h13m43.80s

+07°34'31.80"

Christopher Hay Seeheim (Germany)	15x45	Cleanly split. Western component distinctly brighter, no colour impression.
Robert Zebahl Leipzig (Germany)	200mm (37x)	Visually evident as double star and easy to find. Well split with slight difference in brightness.

HJ636

7m4

11m8

20.5''

288°

2014

Psc

01h14m20.83s

+30°32'31.60"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Very faint B ~20" out but not difficult. ~4 delta mag.

STFA3, 37 Cet

5m2

7m8

47.1''

331°

2018

Cet

01h14m24.04s

-07°55'22.20"

Rene Merting Drachhausen (Germany)	100mm (32x)	bei 32x ein weit auseinander stehender Doppelstern mit einem schönen Farbkontrast, Komponente A im SO ist weisgelblich, die gut 2 Magnituden schwächere Komponente B ist eher schmutzig grauorange
Mark McCarthy Fremont (California/USA)	317mm (553x)	37 Cet: Both orange, B 3 delta mag, so more intense orange. Wide separation PA to the north.

STF104

8m0

9m8

13.4''

323°

2015

And

01h16m57.09s

+38°27'38.70"

Robert Zebahl

Leipzig (Germany)

152mm (69x)

Easy, rather close pair, but with a clear difference in brightness. Primary component appeared slightly orange, companion slightly grey-bluish.

STF108

6m5

9m6

6.4''

62°

2017

And

01h18m47.00s

+37°23'10.60"

Robert Zebahl Leipzig (Germany)	120mm (75x)	Easily split with big difference in brightness.
Robert Zebahl Leipzig (Germany)	152mm (69x)	Easy and pretty uneven. Primary component appeared slightly yellowish.

STF105

8m8

9m8

3.0''

185°

2016

Cas

01h18m57.50s

+66°09'28.00"

Robert Zebahl

Leipzig (Germany)

70mm (100x)

Clearly split with visible difference in brightness.

KR11

9m6

9m7

2.0''

59°

2017

Cas

01h19m40.95s

+61°34'44.40"

Robert Zebahl

Leipzig (Germany)

152mm (129x)

Rather faint double star. Easily split with equally bright components.

STF113, 42 Cet

A-BC

6m5

7m0

1.6''

22°

2018

Cet

01h19m48.30s

-00°30'32.50"

Mark McCarthy Fremont (California/USA)	317mm (553x)	Pale orange and slight blue, PA to NW, ~1 delta mag. 2". Pretty.
Mark McCarthy Fremont (California/USA)	317mm (553x)	Gold and blue, pretty. 2" PA to north.

phi Cas, 34 Cas, H 3 23

5m1

12m3

48.4''

209°

2015

Cas

01h20m04.91s

+58°13'53.80"

5m1

7m0

132.8''

235°

2014

5m1

10m3

179.0''

288°

2015

5m1

10m4

170.4''

239°

2015

Uwe Pilz

Leipzig (Germany)

105mm (288x)

AB: kein Dreifachstern erkennbar, obwohl so ausgewiesen

★

S397, 35 Cas

6m3

8m6

57.4''

342°

2018

Cas

01h21m05.27s

+64°39'29.30"

Rene Merting Drachhausen (Germany)	16x70	ein weit getrenntes Pärchen mit einem schönen Farbkontrast - Komponente A im Süden wirkt blau-weiß, B ist gut 1.5 Größenklassen schwächer und wirkt gräulich
Rene Merting Drachhausen (Germany)	100mm (20x)	bei 32x ein schönes helles Sternpaar, weit getrennt - auffälliger Farbkontrast, A ist reinweiß, B eher schmutzig orange-braun - zurück auf 20x ist die Trennung noch immer sehr deutlich

★

STF115

7m1

7m3

0.5''

160°

2018

Cas

01h23m21.27s

+58°08'35.60"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Peanut, near equal. in nearly the same FOV with Detla Cas, V 465 pretty orange star, and NGC 457, a loose moderately rich open cluster

ES1712

7m9

9m3

47.2''

2°

2015

Cas

01h24m20.10s

+58°56'47.20"

Rene Merting Drachhausen (Germany)	16x70	ein gut isolierter Doppelstern, da kaum weitere Sterne im unmittelbaren Umfeld zu erkennen sind - Komponente B ist schwach und steht weit getrennt im Norden von A - leicht, aber nicht sehr reizvoll für Ferngläser
Rene Merting Drachhausen (Germany)	100mm (20x)	bei 32x ein weit getrenntes Pärchen, aber der schöne Farbkontrast entschädigt - Komponente A im Süden ist weiß und doppelt so hell wie Komponente B, die leicht bräunlich erscheint - zurück auf 20x ist der Doppelstern noch immer weit getrennt und einfach sichtbar

★

STTA17 & BKO10

STTA17

8m0

9m8

35.4''

101°

2015

And

01h24m30.85s

+39°01'30.30"

STTA17

8m0

8m5

134.9''

347°

2014

STTA17

8m5

9m8

68.9''

279°

2015

STTA17

8m5

13m3

81.2''

14°

2015

BKO10

8m0

11m2

141.7''

270°

2015

Christopher Hay Seeheim (Germany)	18x80	The group of stars strikes the eye while sweeping from Mirach to Tau/Upsilon TRI. First thought I'd found an open cluster. Two pairs with practically opposite PAs. Southern pair AB much closer than northern CD, but brightnesses within the pairs very similar. A nice double-double.
Robert Zebahl Leipzig (Germany)	152mm (22x)	The components A-D and F easily visible as a rather conspicuous group with comparatively large distances. I didn't pay attention to the component E. No brighter stars in the immediate vicinity. The pair AB and CD are very similar; CD a bit wider with opposite position angle. Very nice multiple star also for smaller telescopes.

ES2583

8m4

9m3

25.9''

345°

2015

Cas

01h24m33.04s

+53°11'10.20"

Rene Merting

Drachhausen (Germany)

320mm (72x)

bei 72x ein mehr als ordentlich getrenntes Farbkontrastpaar - A im Süden ist eine halbe Größenklasse heller und leicht gelblich, wohingegen B ins grauorangene tendiert

H5 83, psi Cas

4m7

9m2

20.3''

128°

2007

Cas

01h25m55.90s

+68°07'47.80"

Rene Merting

Drachhausen (Germany)

100mm (20x)

bei 32x zeigt sich A wunderschön buttergelb, C mit ordentlich Abstand im SO ist ganz schwach und leicht bräunlich - Helligkeitsunterschied mindestens 4 Größenklassen - ein sehr ungleiches Paar

STF122

6m7

9m5

5.7''

329°

2013

Psc

01h26m53.55s

+03°32'08.30"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

pretty white and orange, PA to N, ~3 delta mag, 6-8"

AC14

8m3

8m9

0.7''

93°

2018

And

01h28m19.28s

+42°46'56.00"

Robert Zebahl

Leipzig (Germany)

152mm (300x)

Immediately visible as a double star, almost separated with little difference in brightness.

S398

6m3

8m0

68.9''

100°

2018

Psc

01h28m22.92s

+07°57'40.90"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

orange with 1 delta mag white to east.

ES4

8m1

9m1

2.8''

101°

2016

And

01h31m05.02s

+43°37'14.60"

Robert Zebahl Leipzig (Germany)	70mm (128x)	Not split. I probably didn't recognised the fainter component. The angular distance shouldn't be a problem.
Mark McCarthy Fremont (California/USA)	508mm (333x)	Split with 333x, ~1.5" 2 delta mag.

STF128

8m1

10m4

11.4''

310°

2015

Cas

01h31m41.16s

+61°02'34.30"

Rene Merting Drachhausen (Germany)	100mm (64x)	erst bei 64x offenbarte sich mir der Begleiter, das lag nicht am Abstand, sondern an der Schwäche von Komponente B - bei dieser Vergrößerung sind beide Sterne nämlich schon ordentlich getrennt - Komponente B im NW ist 2 bis 2.5 Größenklassen schwächer
Uwe Pilz Leipzig (Germany)	105mm (288x)	einfach

STT31

6m5

10m6

4.0''

78°

1991

Psc

01h33m18.28s

+08°12'31.50"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Orange with very faint glow, AV only, to east. ~4-5", 3 delta mag.

STF136, 100 Psc

7m3

8m3

15.7''

77°

2016

Psc

01h34m51.61s

+12°33'31.20"

7m3

13m6

76.9''

312°

2015

7m3

11m6

124.5''

8°

2015

Robert Zebahl

Leipzig (Germany)

70mm (22x)

AB: At 22x easy to separate with well visible difference in brightness. A difference in color is visible, but the assignment of colors was difficult. At 44x A appeared slightly orange, B rather bluish.

STF138

7m5

7m6

1.7''

60°

2018

Psc

01h36m02.86s

+07°38'42.90"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Tight near equal pair, yellow-white, 2" or so.

★

STT33 & DOB2

STT33

7m3

9m0

26.9''

77°

2015

Cas

01h37m22.87s

+58°38'14.70"

DOB2

7m3

10m3

107.0''

109°

2015

Rene Merting Drachhausen (Germany)	16x70	STT33 (AB): 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)	STT33 (AB): 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
Rene Merting Drachhausen (Germany)	100mm (32x)	DOB2 (AC): Komponente C als Anhängsel von STT33 - Komponente C ist bei 32x sehr weit südöstlich von A erkennbar, vierfacher Abstand AB (STT33) - zurück auf 20x sind alle drei Komponenten ebenfalls noch zu erkennen
Mark McCarthy Fremont (California/USA)	317mm (340x)	STT33 (AB): Pretty yellow-white and red-orange pair, wide, 1.5-2 delta mag. Nearby X Cas a very pretty red.

STF141

8m3

8m6

1.7''

303°

2018

And

01h40m03.42s

+38°58'10.70"

Robert Zebahl

Leipzig (Germany)

102mm (125x)

Clearly separated, but still very close. Slightly uneven.

HJ1088

6m3

9m8

19.5''

168°

2015

Cas

01h42m17.70s

+58°37'39.80"

Rene Merting

Drachhausen (Germany)

100mm (32x)

erst bei 32x zeigt sich der schwache Begleiter weit getrennt südlich von A - Größenklassenunterschied enorm bzw. nicht abschätzbar - Komponente A ist weiß mit einem Stich ins Gelbe (ich kann mich aber auch täuschen), B hat keine Farbe, wohl zu schwach auf der Brust - ein Doppelstern für Puristen

★

BU1103, 44 Cas

5m8

12m1

1.6''

0°

2005

Cas

01h43m19.75s

+60°33'04.80"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

44 Cas. Extremely fine, extremely faint spec consistently in one spot in the diffraction, 1", when seeing perfects. Need a slight averted vision to see it.

STF150

7m7

8m2

35.7''

196°

2015

Cet

01h43m22.43s

-07°04'37.30"

Rene Merting

Drachhausen (Germany)

100mm (32x)

bei 32x zeigen zwei ordentlich getrennte annähernd gleichhelle Sterne, Komponente A im Norden ist vielleicht eine halbe Größenklasse heller - leichter Farbkontrast, A weiß, B grauweiß

STF155

7m9

8m0

4.9''

325°

2018

Psc

01h44m15.19s

+09°29'02.70"

Robert Zebahl Leipzig (Germany)	70mm (44x)	Lovely embedded in a small group of stars. The components showed a small difference in brightness and were very close together.
Mark McCarthy Fremont (California/USA)	317mm (553x)	Nice near equal brightness white pair, ~5"

ARN55, V773 Cas

6m3

9m9

160.5''

45°

2003

Cas

01h44m17.96s

+57°32'11.80"

Mark McCarthy Fremont (California/USA)	317mm (553x)	Very wide separation 1 delta mag. physical double. This is the AD pair of a more complicated system. AB = V773 Cas = BU 870 which is 6.29/8.68 0.3", AC = GUI 2, 6.29/16.00 16.8".
Mark McCarthy Fremont (California/USA)	317mm (553x)	Picking up a pinpoint in A's diffraction, very faint with seeing, <1", 3-4 delta mag, white. Marginal.

STF149

8m2

9m3

1.4''

81°

2018

And

01h44m30.83s

+39°57'31.10"

Robert Zebahl

Leipzig (Germany)

102mm (160x)

At 125x almost split, noticeably uneven. At 160x split, but pretty tight.

STF151

10m6

11m0

7.2''

39°

2016

Cas

01h45m59.32s

+61°12'45.60"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Equal, fairly faint but by no means the faintest in a very rich field. Visible in 80mm finder.

STF152

9m0

11m2

9.4''

106°

2015

Cas

01h46m04.90s

+61°13'41.80"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

A about 11th mag and B wide separation 1.5 delta mag. not physical

STF153

9m4

10m4

7.7''

69°

2015

Cas

01h46m34.53s

+61°15'45.00"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Well separated ~10", 1 delta mag pair

STF158

9m0

9m4

2.2''

272°

2018

Tri

01h46m44.07s

+33°09'45.50"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Nice split, pretty wide considering low magnification. Orange-yellow stars about half delta mag

STF162

6m5

7m2

2.0''

199°

2018

Per

01h49m15.47s

+47°53'47.10"

6m5

9m2

20.3''

178°

2018

6m5

10m0

138.7''

96°

2007

7m2

9m2

19.2''

177°

2018

Rene Merting Drachhausen (Germany)	16x70	AC: ein schwieriges Paar aufgrund des Helligkeitsunterschiedes - mit etwas Geduld offenbart sich Komponente C knapp südlich von A sehr dicht an dessen hellem Glanz - die Trennung ist nur in ruhigen Momenten kurzzeitig sichtbar
Robert Zebahl Leipzig (Germany)	70mm (100x)	AB: At 100x partly split, otherwise '8'-shaped. At 128x clearly split. Difference in brightness noticeable.

BU1016

9m9

10m1

0.7''

43°

2015

Tri

01h49m46.70s

+33°03'57.90"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Suspect elongation, seeing not supporting higher magnification

★

1 Ari, STF174

6m3

7m2

2.9''

165°

2018

Ari

01h50m08.60s

+22°16'29.50"

Robert Zebahl Leipzig (Germany)	63mm (46x)	Clearly split, but tight with noticeable difference in brightness.
Robert Zebahl Leipzig (Germany)	70mm (80x)	At 67x pretty tight pair, but separated with a clear difference in brightness. The primary component appeared in a hint of orange. At 80x easy to separate.
Stefan Loibl Rosenheim (Germany)	102mm (102x)	slight color difference, A orange, B blueish
Sarah Gebauer Germany	150mm (27x)	im Dezember 2019 nicht getrennt
Robert Zebahl Leipzig (Germany)	200mm (100x)	Conditions in the target region: SQM-L 20.8 Nice double star with big difference in brightness.
Mark McCarthy Fremont (California/USA)	203mm (533x)	1 Ari. ! Very beautiful yellow-orange A and robin's egg blue B, 3", one delta mag. probably one of the best color pairs
Mark McCarthy Fremont (California/USA)	317mm (553x)	Pretty orange and blue pair, ~2 delta mag, ~2".

STF175

9m0

9m4

28.6''

0°

2018

Ari

01h51m01.96s

+21°06'56.10"

Mark McCarthy

Fremont (California/USA)

317mm (340x)

Near equal white, fairly wide separation

HO311

8m2

7m8

0.4''

178°

2018

Ari

01h51m13.34s

+24°39'08.00"

Mark McCarthy

Fremont (California/USA)

508mm (1067x)

Nice clear split with seeing, more near equal but there is a noticeable magnitude difference, white stars

STF163

6m8

9m1

34.5''

38°

2018

Cas

01h51m16.93s

+64°51'17.90"

Rene Merting Drachhausen (Germany)	16x70	ein ordentlich getrenntes Pärchen - Komponente A im SW strahlt gelblich, B im NO ist schwach erkennbar, aber nicht schwer
Robert Zebahl Leipzig (Germany)	70mm (20x)	Easily split at 20x. From 44x the brighter component was orange colored, the fainter one tends to be more bluish.
Mark McCarthy Fremont (California/USA)	317mm (553x)	Pretty orange star in the 80mm finder. Wide separated blue B, 2 delta mag.

STF178

8m2

3.0''

205°

2018

Ari

01h52m02.54s

+10°48'38.10"

Robert Zebahl Leipzig (Germany)	63mm (67x)	Clearly split, tight, apparently equally bright components.
Robert Zebahl Leipzig (Germany)	70mm (100x)	Split with equally bright components.

J671

11m6

11m8

2.7''

153°

2016

Ari

01h52m58.18s

+21°52'13.10"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

B star is faint but not difficult, ~3", very nice

STF179

7m6

8m1

3.5''

160°

2018

And

01h53m10.72s

+37°19'16.30"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Near equal magnitude, 4", nice orange-yellow color.

BU260

8m8

9m0

1.1''

261°

2018

Ari

01h53m14.21s

+15°26'00.30"

Mark McCarthy

Fremont (California/USA)

203mm (533x)

Fine pair, well split, half delta mag

gamma Ari, STF180

4m5

4m6

7.4''

2°

2018

Ari

01h53m31.76s

+19°17'38.60"

Stefan Loibl Rosenheim (Germany)	102mm (41x)	easily split at 41x, no color difference, nice view with 8m star HD11557 in the same FOV
Robert Zebahl Leipzig (Germany)	200mm (80x)	Nice, obvious double star. Both components have similar brightness and appeared white.
Mark McCarthy Fremont (California/USA)	203mm (533x)	Gamma Arietis = Mesarthim: Perfectly equal pair, wide, very white
Mark McCarthy Fremont (California/USA)	317mm (277x)	Gamma Ari. Equal yellow-white, wide, bright.
Mark McCarthy Fremont (California/USA)	317mm (553x)	Gamma Aries. Nice near equal magnitude pair, white, ~4".

COU352

11m0

11m6

1.0''

21°

2015

Ari

01h54m23.02s

+17°53'43.80"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Faint pair, smeared, elongated and resolves with seeing and averted vision

HEI433

10m8

11m6

3.6''

192°

2015

Ari

01h54m28.42s

+17°37'49.70"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

11th mag B star easier since wider separation, faint, half delta mag, wide pair

HEI208

11m4

11m8

1.4''

180°

2015

Ari

01h54m37.99s

+14°05'34.20"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Very faint, need to wait for seeing, splits with seeing and a little averted vision, ~1.5", half delta mag

A2323

9m5

10m9

1.7''

146°

2017

Ari

01h54m45.56s

+17°28'01.40"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Fine pair, easily seen B, not difficult since wider separation. ~1.5", 1.5 delta mag

STF170

7m5

8m2

3.2''

244°

2016

Cas

01h55m27.35s

+76°13'28.40"

Robert Zebahl

Leipzig (Germany)

70mm (57x)

At 57x barely split with noticeable difference in brightness. At 128x easy split.

★

COU453

10m4

10m8

0.7''

282°

2016

Ari

01h56m19.96s

+25°20'24.00"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

I get clean split, the B star is very faint and just within A's diffraction ring, but it's there. Great!

★

STF182

8m3

3.6''

125°

2016

Cas

01h56m23.56s

+61°16'52.00"

Robert Zebahl

Leipzig (Germany)

70mm (57x)

At 44x almost split. At 57x equally bright components visible.

STF189

9m9

11m0

9.0''

269°

2014

Ari

01h57m09.47s

+18°57'32.20"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Orange and blue stars, wide, surprised these are nice hard points

★

A1920

9m5

10m1

1.8''

236°

2018

Tri

01h57m52.62s

+33°10'19.60"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Nice clean split, very pretty white stars, seems a bit more than half delta mag

H5 12, 9 Ari, lambda Ari

4m8

6m7

37.3''

48°

2018

Ari

01h57m55.71s

+23°35'45.80"

Robert Zebahl Leipzig (Germany)	70mm (15x)	Easy to split with large distance and difference in brightness.
Stefan Loibl Rosenheim (Germany)	102mm (41x)	easily split, both components white, no color difference
Uwe Pilz Leipzig (Germany)	105mm (200x)	der helle Stern ist blauweiß

S404

7m6

9m7

29.2''

84°

2015

And

01h58m04.61s

+41°23'09.50"

Rene Merting

Drachhausen (Germany)

16x70

der Doppelstern liegt südwestlich einer auffälligen Sternkette, die sich von SO nach NW zieht - mit etwas Geduld ist Komponente B knapp östlich von A zu erkennen - A ist nicht die hellste Leuchte, B noch deutlich schwächer

FRK3

6m7

9m7

44.3''

224°

2015

Cas

01h58m18.54s

+59°37'33.40"

Rene Merting Drachhausen (Germany)	16x70	ein ungleiches Paar - Komponente B steht gut getrennt südwestlich und ist mehr als 2 Größenklassen schwächer und wirkt dadurch grau-braun im Vergleich zu A
Rene Merting Drachhausen (Germany)	100mm (20x)	bei 32x schon weit auseinander - Komponente A ist schneeweiß, die viel schwächere Komponente B im SW eher braungrau - zurück auf 20x zeigt sich ein immer noch ordentlich getrenntes Pärchen, der Farbkontrast ist jetzt nicht mehr ganz so auffallend

AG28

9m8

10m8

3.2''

175°

2015

Tri

01h58m25.93s

+31°55'42.70"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Fine pair, well split, one delta mag white-blue stars

STF194

7m6

9m5

1.3''

279°

2018

Ari

01h59m18.95s

+24°49'44.60"

Mark McCarthy Fremont (California/USA)	317mm (553x)	Fairly faint 1.5" near equal magnitude, maybe 1/2 delta mag. Slightly orange, pretty.
Mark McCarthy Fremont (California/USA)	508mm (533x)	Lovely white pair, near equal, well separated, ~3"

STF200

9m6

10m3

8.1''

124°

2018

Ari

02h01m36.23s

+24°05'22.30"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Wide separated white pair, more than one delta mag

BU513, 48 Cas

4m7

6m7

0.6''

320°

2013

Cas

02h01m57.55s

+70°54'25.40"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Searched around the swollen, shimmering bright A star disk and felt there was a faint close B trying to resolve in the first diffraction at 553x. Apodizing mask cleaned up the image but no B resolved

alpha Psc, 113 Psc, Alrischa, Kaitain, Okda

STF202

4m1

5m2

1.8''

262°

2017

Psc

02h02m02.80s

+02°45'49.40"

PWL1

4m1

8m2

404.9''

63°

2006

PWL1

4m1

8m6

434.5''

335°

2006

Uwe Pilz

Leipzig (Germany)

105mm (88x)

AB: der hellere Stern ist weiß

../projects/double-stars/uwe-pilz/sketches/191129alpPsc.jpg

★

STF201, eps Tri

5m5

11m4

4.2''

119°

1990

Tri

02h02m57.97s

+33°17'02.90"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Epsilon Tri. Very nice! Bright A star is a white blaze, and outside of its glow is very small point of the B star, very fine. Very nice indeed

★

STF208, 10 Ari

5m8

7m9

1.3''

349°

2018

Ari

02h03m39.26s

+25°56'07.60"

Uwe Pilz Leipzig (Germany)	105mm (200x)	helle Stelle im ersten Ring
Mark McCarthy Fremont (California/USA)	203mm (533x)	10 Ari Pretty white and slightly off-white or blue-white B, 2.5 delta mag, ~1.5"
Mark McCarthy Fremont (California/USA)	317mm (553x)	~2 delta mag, ~1" very nice. ~1 disk split. Nice!

STF205, gamma And, 57 And, Alamak

A-BC

2m3

5m0

9.4''

63°

2016

And

02h03m53.92s

+42°19'47.50"

Robert Zebahl Leipzig (Germany)	63mm (42x)	Easy to split with quite large difference in brightness.
Uwe Pilz Leipzig (Germany)	105mm (52x)	einfach
Robert Zebahl Leipzig (Germany)	152mm (100x)	Very easy. A: orange, BC: rather white.
Rene Merting Drachhausen (Germany)	320mm (45x)	bei 45x ein knapp getrenntes Pärchen - Komponente A knallgelb mit einem Anhängsel nordöstlich - Komponente BC strahlt 3 Größenklassen schwächer - bei 144x wirkt BC grün-weiß, bei 45x war der Eindruck noch leicht gelblich

STF212

8m3

8m7

1.9''

162°

2018

Ari

02h06m14.96s

+25°06'31.00"

Robert Zebahl Leipzig (Germany)	63mm (168x)	Not split, but partially seen as an '8'. Overall the double star appeared rather faint and both components seemed to be similarly bright.
Robert Zebahl Leipzig (Germany)	70mm (128x)	Barely split with slight difference in brightness.
Mark McCarthy Fremont (California/USA)	317mm (170x)	A star is deformed shaped, could be very close near equal pair but seeing is poor and cannot resolve

TDS2117

10m8

11m0

2.1''

14°

2015

Ari

02h06m24.51s

+21°41'56.00"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Fine near equal white pair, well separated to wide

HO312, 11 Ari

6m0

11m5

1.7''

340°

2004

Ari

02h06m49.22s

+25°42'16.50"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

11 Ari Used apodizing screen to tone A down. B is bluish & resolves out on the edge of A's diffraction with seeing and is very, very faint compared to A

STF221

8m1

9m4

8.5''

145°

2015

Ari

02h09m42.76s

+20°20'53.30"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

Orange and blue pair, 2 delta mag., ~8" Pretty.

STF219

8m0

8m9

11.7''

186°

2015

Tri

02h10m16.10s

+33°21'55.20"

Robert Zebahl Leipzig (Germany)	55mm (25x)	Well separated with noticeable difference in brightness.
Mark McCarthy Fremont (California/USA)	203mm (205x)	Pretty white, bright A star and wide B, three delta mag

COU1068

10m7

11m2

1.1''

246°

2015

Tri

02h10m18.35s

+35°10'24.10"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Seeing isn't what it needs to be. Suspected elongation at 205x, 333x elongated it more but did not split, the star images are too hairy

★

STI1797

7m5

11m8

8.6''

142°

2015

Per

02h10m24.05s

+56°17'49.60"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Pretty orange and blue stars, 2-3 delta mag, well separated 10"

STF224

8m3

8m9

6.0''

244°

2016

Ari

02h10m52.01s

+13°41'00.40"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

Near equal brightness white pair, ~10", nice split.

59 And, STF222

6m0

6m7

16.5''

36°

2018

And

02h10m52.83s

+39°02'22.40"

Robert Zebahl Leipzig (Germany)	8x40	Separated, but very tight. I used a tripod.
Rene Merting Drachhausen (Germany)	16x70	ein sehr dichtes Sternpaar, ganz knapp getrennt sichtbar - Komponente B im NO ist eine halbe Größenklasse schwächer - leichter Farbunterschied und das Phänomen, dass der Farbkontrast zwischen beiden Sternen immer hin und her springt - ich kann nicht genau sagen, welcher Stern das kühlere oder wärmere Weiß hat
Rene Merting Drachhausen (Germany)	100mm (32x)	bei 32x ein auffälliges Sternpaar - gut getrennt mit leichtem Farbkontrast, Komponente A im SW ist weiß, die Komponente B zwar auch, aber mit einem Stich ins orange, eigenartig - Helligkeitsunterschied eine halbe Magnitude
Robert Zebahl Leipzig (Germany)	120mm (18x)	Well split with noticeable difference in brightness.
Robert Zebahl Leipzig (Germany)	200mm (100x)	Conditions in the target region: SQM-L 20.4 Nice and evident double star, easy to split. About 12 arcminutes NE there is NGC828 (v12.3m),

STF226

8m0

9m6

1.8''

231°

2017

Ari

02h12m15.40s

+23°57'29.50"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

Near equal mag. orange, but split is lost in poor seeing, appears oval with 170x., it appears as two lobes awash in diffraction at 277x

★★★

STF227, iota Tri, 6 Tri

5m3

6m7

3.7''

69°

2016

Tri

02h12m22.28s

+30°18'11.10"

Robert Zebahl Leipzig (Germany)	70mm (57x)	At 44x even separable with a clear difference in brightness, whereby the companion is almost outshone by the primary component. At 57x easy to separate. Primary component shines in bright orange, companion slightly orange. Beautiful sight together with STF232 in one field of view!
Uwe Pilz Leipzig (Germany)	105mm (88x)	weiß und blau
Mark McCarthy Fremont (California/USA)	203mm (205x)	6 Tri. Yellow A, white b, pretty. Wide, about two delta mag
Frederik Wanink Itterbeck (Germany)	254mm (200x)	Helligkeitsunterschied deutlich

★★★

STF231, 66 Cet

5m7

7m7

16.8''

235°

2018

Cet

02h12m47.54s

-02°23'37.10"

Uwe Pilz

Leipzig (Germany)

105mm (88x)

weiß und leuchtend rot!

../projects/double-stars/uwe-pilz/sketches/191129_66Cet.jpg

S405

6m5

7m2

55.5''

277°

2018

Cep

02h12m49.98s

+79°41'29.30"

Rene Merting

Drachhausen (Germany)

100mm (20x)

bei 20x weit auseinander stehendes helles Pärchen - beide Sterne sind etwa gleich hell (laut Stelle Doppie 0.68 mag Helligkeitsunterschied)

STF229

9m2

10m3

2.5''

356°

2018

Tri

02h13m58.92s

+34°30'50.80"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Bluish stars, B is a bit faint but wide and clear

★★

STF232

7m8

7m9

6.5''

66°

2016

Tri

02h14m42.16s

+30°23'41.20"

Robert Zebahl Leipzig (Germany)	70mm (22x)	Very beautiful view! With all used magnifications together with iota Tri (6 Tri) in one field of view. Separable at 22x, but the components are still quite close together and appear similarly bright. At 44x easy to separate with little difference in brightness. At 57x a very small color difference is visible without being able to clearly name the colors. STF232 was sketched together with 6 Tri.
Mark McCarthy Fremont (California/USA)	203mm (205x)	Pretty white stars, only a slight delta mag, well split

STF230

7m9

9m4

23.8''

259°

2015

Per

02h14m57.07s

+58°29'26.00"

Rene Merting Drachhausen (Germany)	16x70	ein knapp getrenntes Pärchen - Komponente B westlich von A wirkt wie ein schwacher Schimmer - kaum ein Farbunterschied, obwohl B gut 1.5 Größenklassen schwächer ist - bei diesem Helligkeitsunterschied wirkt die schwächere Komponente meist dumpf grau-braun, hier ist das nicht der Fall
Rene Merting Drachhausen (Germany)	100mm (20x)	bei 32x einfach getrennt - Komponente B im Westen ist gut 1.5 Größenklassen schwächer und grau, A ist auch nicht wirklich strahlend weiß - zurück auf 20x noch immer ein gut getrenntes Pärchen

STF237

9m5

9m9

14.5''

237°

2015

Ari

02h15m42.29s

+10°46'15.60"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Near equal obvious split. seeing not all that great, full aperture. (B star is 0.1" pair equal mag)

STF240

8m3

8m6

4.8''

52°

2018

Ari

02h17m15.74s

+23°52'24.80"

Mark McCarthy Fremont (California/USA)	317mm (277x)	Equal white ~9th mag, ~5"
Mark McCarthy Fremont (California/USA)	317mm (277x)	Faint but pretty wide separation ~4", equal magnitude yellowish-white.

★

STF234

8m7

9m4

0.6''

222°

2012

Cas

02h17m23.00s

+61°21'06.50"

Mark McCarthy

Fremont (California/USA)

317mm (885x)

Light orange star, definitely elongated, maybe notched, but no convincing split. Tough little Struve.

STF239

7m1

7m8

13.6''

212°

2017

Tri

02h17m25.29s

+28°44'42.10"

Robert Zebahl Leipzig (Germany)	55mm (25x)	Easy to split, large distance, noticeable difference in brightness.
Mark McCarthy Fremont (California/USA)	203mm (205x)	Wide, white, one delta mag

STF244

9m3

9m4

4.4''

290°

2018

Ari

02h17m34.01s

+22°13'50.30"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

Pretty faint, equal magnitude ~3-4", well split.

7 Per, BU1170 & S409

BU1170

A-BC

6m1

12m3

68.7''

358°

2013

Per

02h18m04.58s

+57°30'58.70"

S409

6m1

9m6

123.3''

136°

2015

BU1170

6m1

12m4

207.1''

12°

2015

BU1170

11m5

11m7

0.3''

313°

1958

Mark McCarthy Fremont (California/USA)	317mm (553x)	Near the Double Cluster. Pretty orange-yellow star. B star is distant and faint -- how know binary? The B star feels elongated with averted vision.
Mark McCarthy Fremont (California/USA)	317mm (553x)	BU1170 (BC): Near the Double Cluster. Pretty orange-yellow star. B star is distant and faint -- how know binary? The B star feels elongated with averted vision.

STF245

7m3

8m0

11.0''

294°

2015

And

02h18m36.27s

+40°16'43.70"

Rene Merting Drachhausen (Germany)	16x70	die schwächere Komponente ist nordwestlich des Hauptsterns zu erkennen - es sind eindeutig zwei Sterne, sie sind aber noch nicht eindeutig trennbar
Rene Merting Drachhausen (Germany)	100mm (32x)	bei 64x steht Komponente B im NW gut abgesetzt von A - nur geringer Helligkeitsunterschied - zurück auf 32x dann zeigt sich ein nettes eng stehendes Pärchen
Robert Zebahl Leipzig (Germany)	120mm (50x)	Both components well seen with noticeable difference in brightness.

STF249

7m2

9m0

2.4''

197°

2018

And

02h21m35.66s

+44°35'59.70"

Robert Zebahl

Leipzig (Germany)

63mm (168x)

Not separated. The diffraction disk showed again and again irregularities, which indicated a double star.

BLL7, S Per

10m8

11m4

69.1''

20°

2018

Per

02h22m51.72s

+58°35'11.50"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Wide near equal pair

★

HLD7

8m0

9m9

1.7''

182°

2016

Per

02h25m25.96s

+58°12'09.30"

Mark McCarthy Fremont (California/USA)	203mm (533x)	Yellow A and bluish b, just split the faint B, in a swimming mess due to poor seeing
Mark McCarthy Fremont (California/USA)	317mm (553x)	Challenging due to poor transparency but no doubt, a 3 delta mag pair in the diffraction, 1.5"

A2329

9m4

9m6

0.5''

101°

2018

Cet

02h27m45.86s

+04°25'55.90"

Mark McCarthy

Fremont (California/USA)

508mm (1067x)

Split at 533x but used barlow to confirm the PA accurately since this is a short period pair. Nicely split orange stars, half delta mag. Seeing it now at nearly the furthest extent of its orbit, it will become more difficult with time. The pair is a "mere" 55.91 lightyears away

★★

STF262, iota Cas

4m6

6m9

2.9''

230°

2017

Cas

02h29m03.96s

+67°24'08.70"

4m6

9m1

6.7''

117°

2015

4m6

8m5

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!
Rene Merting Drachhausen (Germany)	100mm (142x)	AB: bei 142x zeigt sich Komponente B im SW mit gut einem Drittel das Abstandes AC, Helligkeitsunterschied 1.5 bis 2 Größenklassen AC: bei 64x getrennt, schöner Farbkontrast, Komponente A ist weiß mit einem Stich ins Gelbe, C leicht bräunlich AD: bei 32x extrem weiter Abstand zwischen A und D, Helligkeitsunterschied mehr als 2 Größenklassen (laut Stelle Doppie sogar 3.85 mag)
Uwe Pilz Leipzig (Germany)	105mm (200x)	Dreifachstern lohnend
Sarah Gebauer Germany	150mm (160x)	bei 160x sind die Komponenten AC getrennt, B leider nicht, die schwache Komponente C versinkt fast im Strahlen der hellen Komponente A, ein sehr reizvoller Anblick! Von Komponente D wusste ich während der Beobachtung noch nichts, sie taucht unter den Feldsternen der Zeichnung auch auf
Robert Zebahl Leipzig (Germany)	152mm (129x)	Component D easy to see even at lowest magnification. Component C is also easily visible at 49x. At 69x the component B is indicated, at 100x clearly visible. C appears slightly grey-bluish and obviously fainter than B. Grand sight at 129x!

HJL1019

6m1

9m6

217.1''

323°

2000

Ari

02h29m13.68s

+23°28'08.40"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Very wide separation, 1-2 delta mag star to the west-ish. B star is a 0.4" pair, not seen.

STF268

6m7

8m5

2.9''

131°

2018

Per

02h29m24.96s

+55°32'10.50"

Robert Zebahl Leipzig (Germany)	70mm (80x)	At 67x the faint companion can be guessed and is still slightly outshined by the primary component. At 80x and 100x relatively well separable with clear difference in brightness, but close together. The companion is close to the first diffraction ring of the primary component.
Rene Merting Drachhausen (Germany)	100mm (107x)	bei 64x lässt sich der Stern nicht richtig scharf stellen - bei 107x ist Komponente B dann ganz knapp getrennt südöstlich von A erkennbar - Helligkeitsunterschied eine 3/4 Größenklasse (1.78 mag lt. Stelle Doppie)
Robert Zebahl Leipzig (Germany)	152mm (129x)	Easily separable with significant difference in brightness. The fainter companion is nicely separated from the primary component and visible as a tiny star.
Mark McCarthy Fremont (California/USA)	317mm (553x)	Orange A, faint, wide separated B.

STF263, V528 Cas

8m6

10m9

15.0''

103°

2015

Cas

02h29m37.75s

+60°39'26.20"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

At the end of an arc of three stars of similar magnitude. The pair is wide, 2 delta mag. Quadruple system but with a lot of complicated orbital dynamics going on: AB, AC, AD, BC, BD, CD

STF271

5m9

9m9

12.8''

183°

2015

Ari

02h30m32.31s

+25°14'06.80"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Yellow white with very faint bluish B, 3 delta mag to south, wide separation.

★

STF270

7m0

9m7

21.3''

306°

2016

Per

02h30m50.65s

+55°32'54.20"

Rene Merting Drachhausen (Germany)	16x70	der Doppelstern steht innerhalb einer sehenswerten Formation aus 6 Sternen, die ein gleichseitiges Dreieck bilden - die hellsten drei Sterne bilde eine Seite im Norden, zur Spitze nach Süden werden die Sterne immer schwächer - STF270 steht mitten in der Nordseite - Komponente B ist wie ein kleiner zarter Hauch nordwestlich von A erkennbar, Helligkeitsunterschied mehr als 2.5 Größenklassen - kein reizvoller Fernglas-Doppelstern, aber die Umgebung ist interessant
Rene Merting Drachhausen (Germany)	100mm (32x)	bei 32x ein leichter Fang, gut getrenntes Pärchen - Komponente B im NW ist zwar sehr schwach, aber direkt immer noch gut erkennbar - Helligkeitsunterschied 3 Größenklassen - Komponente A strahlend weiß, B eher grau, wenn überhaupt als Farbe erkennbar
Mark McCarthy Fremont (California/USA)	317mm (553x)	Nice orange star with wide B
Mark McCarthy Fremont (California/USA)	317mm (553x)	Tighter, 1 D-mag, white A reddish B.

A968

9m0

9m5

1.8''

27°

2018

And

02h31m15.90s

+47°02'32.10"

Robert Zebahl

Leipzig (Germany)

102mm (125x)

Clearly split, tight, slightly unequal.

STF93, alp Umi

2m0

9m1

18.4''

236°

2016

UMi

02h31m49.09s

+89°15'50.70"

Rene Merting Drachhausen (Germany)	100mm (32x)	bei 32x knallt die Hauptkomponente A schön hellgelb rein, Komponente B ist als feiner zarter Lichtpunkt knapp daneben erkennbar - Größenklassenunterschied nicht abschätzbar, auf jeden Fall riesig
Rene Merting Drachhausen (Germany)	320mm (45x)	bei 45x ist B sehr knapp getrennt von A erkennbar - Komponente A strahl auf den ersten Blick weiß, bei genauerem Hinsehen mischt sich ein zartes Gelb unter

STF272

8m3

8m4

1.9''

216°

2017

Per

02h33m08.71s

+58°27'44.90"

Robert Zebahl

Leipzig (Germany)

152mm (129x)

Easy to separate, but close together with very little difference in brightness. Beautiful view. Double star stands in a half arc of stars.

HJ2143

8m1

9m6

23.5''

20°

2018

Per

02h33m32.79s

+57°32'14.80"

Rene Merting Drachhausen (Germany)	16x70	Komponente B ist nur mit viel Konzentration knapp getrennt und sehr schwach nordöstlich von A zu erkennen - schwierig
Rene Merting Drachhausen (Germany)	100mm (32x)	bei 32x ein ordentlich getrenntes Pärchen - Komponente B ist sehr schwach, gut 1.5 Größenklassen schwächer - Komponente A ist weiß, B wirkt grau
Rene Merting Drachhausen (Germany)	320mm (45x)	bei 45x ein weit getrenntes Pärchen, auffallend am südwestlichen Rand der Sternhaufens NGC 957 - Komponente B ist gut 1.5 Magnituden schwächer - A weiß, B rostbraun

A1528

9m4

9m6

1.6''

193°

2017

And

02h35m42.19s

+44°11'23.30"

Robert Zebahl

Leipzig (Germany)

102mm (160x)

At 125x almost separated with visible difference in brightness. AT 160x rather faint, barely split, little difference in brightness.

★★

AG304, 15 Tri

5m6

6m8

142.4''

16°

2013

Tri

02h35m46.82s

+34°41'15.20"

Christopher Hay Seeheim (Germany)	7x50	Well split. Main star yellow-orange, secondary an ice-blue pinprick. With overall brightness of 5m1 just visible to naked eye under my suburban sky. Interesting star field with a line of 5 stars pointing S-SW away from 15 Tri and a further striking star chain to the west. Placing Gamma-Delta-7 Tri within 7.5° FOV makes a very attractive overall field. Mira variable R Tri just ½ degree to the S-SE was around maximum at time of observation and presented a much paler orange than 15 Tri A. Charming colour contrast ensemble with the two components of the double plus the variable.
Rene Merting Drachhausen (Germany)	18x70	ein extrem komfortabel getrenntes Sternpaar - Komponente A im Süden strahlt weißgelb, B ist 1.5 Größenklassen schwächer und wirkt kupfergrau - interessant: parallel zu den beiden Sternen stehen westlich zwei deutlich schwächere Sterne in gleichem Abstand und Positionswinkel wie die Komponenten von 15 Tri - alle 4 Sterne bilden ein Parallelogramm
Christopher Hay Seeheim (Germany)	80mm (30x)	A beautiful, wide pair. Main star orangish yellow, secondary ice-blue. Attractive star field in 2.7° FOV: several similarly-separated pairs to the north and east, and two striking star chains to the south and west.

★★

30 Ari

STFA5

6m5

7m0

37.9''

275°

2018

Ari

02h37m00.52s

+24°38'50.00"

RAO8

7m0

11m0

0.6''

282°

2018

Robert Zebahl Leipzig (Germany)	70mm (22x)	AB: At 22x widely separated, striking with a rather small difference in brightness. A seemed a bit warmer in color compared to B with a hint of orange. At 44x, both seemed slightly orange with very little difference in color.
Uwe Pilz Leipzig (Germany)	105mm (88x)	AB: trennbar bei 22x. Weiß und blau
Mark McCarthy Fremont (California/USA)	317mm (277x)	AB: Near equal light orange, very wide. B has a C pair 0.6" and 4 delta mag.
Mark McCarthy Fremont (California/USA)	317mm (553x)	AB: Near equal magnitude, wide separated, PA to WSW

STF285

7m5

8m1

1.7''

162°

2018

Tri

02h38m45.91s

+33°25'08.20"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Very finely split near equal pair. Orange, about 1/2 disk split.

★

A1279

10m1

2.1''

306°

2015

Per

02h40m25.95s

+55°18'33.40"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Can just see the faint star in the 80mm finder. In the scope it is a hazy elongated smear which resolves to two equal points with seeing, 2", Very nice!

STF283

8m4

9m0

1.8''

210°

2018

Cas

02h40m31.92s

+61°29'02.20"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Well split light orange pair, half delta mag.

STF284, V482 Cas

7m9

9m9

6.9''

190°

2018

Cas

02h40m44.95s

+61°16'56.10"

Rene Merting

Drachhausen (Germany)

100mm (64x)

bei 64x zeigt sich Komponente B gut getrennt südlich von A - schönes Kontrastpaar, bestimmt 2.5 Größenklassen Helligkeitsunterschied

★

STF291

7m7

7m5

3.4''

118°

2017

Ari

02h41m06.59s

+18°48'00.70"

7m7

9m5

65.5''

242°

2015

Robert Zebahl Leipzig (Germany)	70mm (57x)	AB: At 44x almost, at 57x clearly split, but still very tight with rather small difference in brightness.
Uwe Pilz Leipzig (Germany)	105mm (88x)	hellster Stern gelb, andere Farben nicht erkennbar

STF295, 84 Cet

5m8

9m7

3.6''

301°

2012

Cet

02h41m14.00s

-00°41'44.40"

Robert Zebahl Leipzig (Germany)	102mm (160x)	Quite easy at a moderate distance, whereby the companion appeared rather faint and was best visible with averted vision.
Uwe Pilz Leipzig (Germany)	105mm (144x)	trotz diesigem Himmel bei 144x indirekt erkennbar. Schwieriger bei 200x
Robert Zebahl Leipzig (Germany)	152mm (129x)	Easy. The quite dim companion is immediately visible in moderate distance clearly outside of the first diffraction ring despite few, high clouds. The primary component appeared white-yellowish.

HJ1123

8m4

8m5

20.1''

249°

2018

Per

02h41m58.44s

+42°47'30.60"

Rene Merting

Drachhausen (Germany)

100mm (32x)

bei 32x knapp getrennt - ein schwacher Doppelstern, der kaum auffällt im Zentrum des Sternhaufens M 34

★★

STT44

8m5

9m0

1.4''

56°

2018

Per

02h42m13.13s

+42°41'57.20"

8m5

8m3

87.2''

290°

2017

Uwe Pilz Leipzig (Germany)	105mm (200x)	AB: schwierig
Robert Zebahl Leipzig (Germany)	152mm (129x)	AB: At 129x barely separable, at 150x separated quite clearly with a noticeable difference in brightness. The double star is located within Messier 34!
Mark McCarthy Fremont (California/USA)	317mm (553x)	AB: In M34 open cluster! Close near equal pair, 1.5", very nice! The cluster is pretty, loose, and jangly with stars of varying magnitudes. What a treat.

BU521

6m3

11m6

5.4''

159°

2015

Per

02h43m01.98s

+48°15'54.90"

Mark McCarthy

Fremont (California/USA)

317mm (885x)

Bulging heart shape (if seen from slightly below and to the side), even at 885x, but no split. Light yellow-orange.

gamma Cet, 86 Cet, Kaffaljidhma

STF299

3m5

6m2

2.0''

299°

2015

Cet

02h43m18.04s

+03°14'08.90"

ALD124

3m5

10m2

843.1''

306°

2000

Rene Merting Drachhausen (Germany)	100mm (142x)	AB: bei 142x wirkt der Doppelstern leicht länglich, die Beugungsscheibchen sind jetzt schon zu groß (mittleres Seeing), um sinnvoll weiter zu vergrößern
Uwe Pilz Leipzig (Germany)	105mm (144x)	AB: extrem schwierig

★

BU306

6m4

10m4

3.0''

19°

2015

Ari

02h43m51.25s

+25°38'18.00"

Mark McCarthy Fremont (California/USA)	317mm (277x)	Very nice white and 3 delta mag bluish B, nicely seen 4".
Mark McCarthy Fremont (California/USA)	317mm (553x)	~4", ~4 delta mag, PA to north. very faint blue but steady.

STF300

7m9

8m1

3.2''

316°

2018

Ari

02h44m36.85s

+29°27'36.60"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Faint but very easy 3-4" separated pair. Near equal magnitude.

BU307

7m1

11m6

16.0''

317°

2015

Ari

02h47m38.61s

+29°40'42.80"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Faint B to WNW, wide separation, not terribly difficult.

STF301

7m8

8m7

8.2''

18°

2016

Per

02h47m38.75s

+53°56'35.80"

Robert Zebahl Leipzig (Germany)	70mm (22x)	Rather faint double star with a handful of other stars in the immediate vicinity. At 22x clearly separated, but still close together with visible difference in brightness. At 31x the primary component looked slightly orange.
Rene Merting Drachhausen (Germany)	100mm (32x)	bei 32x ganz knapp getrenntes Pärchen - Komponente B im Norden ist eine halbe Größenklasse schwächer - nett anzusehen

STF311, pi Ari, 42 Ari

5m3

8m0

3.3''

118°

2015

Ari

02h49m17.55s

+17°27'51.50"

Robert Zebahl Leipzig (Germany)	70mm (133x)	The companion is visible as elongated, non-condensed brightening in the first diffraction ring of the primary component.
Uwe Pilz Leipzig (Germany)	105mm (144x)	sehr schwierig bei 88x, eindeutig bei 144x

STT46

6m8

10m8

4.8''

75°

2015

Ari

02h50m00.31s

+30°31'34.80"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Yellow with very faint orangish B, PA to NE, ~5-6".

★★

eta Per, 15 Per

STF307

3m8

8m5

28.7''

301°

2018

Per

02h50m41.81s

+55°53'43.80"

STF307

3m8

11m6

64.0''

269°

2014

WAL19

3m8

11m4

57.7''

25°

2013

WRD1

11m6

12m7

5.2''

116°

2015

SHJ34

3m8

9m2

242.9''

297°

2012

FYM161

11m6

14m0

15.8''

229°

2015

Rene Merting Drachhausen (Germany)	16x70	STF307 (AB): Miram, die Komponente A ist satt gelb und bildet ein flaches Dreieck mit zwei Sternen westlich und nordwestlich, die aber 1,8' und 3,9' entfernt stehen - dazwischen wird alles vom Glanz von Miram überstrahlt - im Fernglas hat B mit den eigentlich ordentlichen Daten wie Abstand 30,4" und Helligkeit 8.5 mag (andere Quellen sagen 10.7 mag) trotzdem keine Chance auf Erleuchtung
Rene Merting Drachhausen (Germany)	100mm (32x)	STF307 (AB): bei 32x sehr ansehnlich - Komponente B steht gut getrennt nordwestlich vom signal-gelben Eta Persei - Helligkeitsunterschied sehr groß, nicht abschätzbar
Uwe Pilz Leipzig (Germany)	105mm (88x)	Dreifachsystem, nahe Komponente: PW und Abstand stimmt, is aber viel zu dunkel (10m statt 8m5). Ein Mysterium
Mark McCarthy Fremont (California/USA)	317mm (553x)	STF307 (AB): Orange with faint, bluish, widely separated B.

STF316

9m5

9m7

14.4''

135°

2018

Per

02h52m05.13s

+37°17'45.70"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Wide near equal

★

A2906 & STF314

A2906

7m3

8m8

0.3''

115°

2018

Per

02h52m52.03s

+52°59'50.60"

STF314

AB-C

7m0

7m3

1.6''

316°

2018

Robert Zebahl Leipzig (Germany)	152mm (129x)	STF314 (AB-C): 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)	STF314 (AB-C): ähnlich hell
Mark McCarthy Fremont (California/USA)	317mm (553x)	A2906 (AB): This is the brighter of the STF 314 pair. I have a feeling it is slightly elongated but nothing certain.
Mark McCarthy Fremont (California/USA)	317mm (553x)	STF314 (AB-C): a nice half delta mag pair ~2"
Mark McCarthy Fremont (California/USA)	317mm (553x)	STF314 (AB-C): near equal brightness, AB more yellow yellow-white of the two, ~2 disk separation

STT48

6m4

10m6

6.6''

317°

2016

Per

02h53m21.07s

+48°34'11.90"

Mark McCarthy

Fremont (California/USA)

317mm (885x)

Yellow-orange with bluish round haze above it, the haze brightens with seeing and averted vision but does not resolve to point even at 885x

STF318, 20 Per

AB-C

5m4

9m7

14.0''

237°

2014

Per

02h53m42.58s

+38°20'15.60"

Rene Merting Drachhausen (Germany)	100mm (64x)	trotz großem Abstand sind 64x notwendig für die Trennung - Komponente C ist zu schwach für niedrigere Vergrößerungen, vielleicht 3.5 mag schwächer als AB - jetzt bei 64x, wo C sichtbar wird, ist sie schon gut abgesetzt von AB erkennbar und wirkt leicht bräunlich, AB dagegen wirkt warm-weiß
Mark McCarthy Fremont (California/USA)	317mm (553x)	Wide 2 delta mag. no sign of elongation of BU 524, which should be the B star's pairing
Mark McCarthy Fremont (California/USA)	317mm (553x)	Yellow, 2 delta mag, blue B. Wide separation.

BU1293

6m8

10m4

2.0''

349°

1991

Per

02h54m00.98s

+47°09'39.20"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Uncertain. Seems a brightening persistent on one side of the diffraction but nothing resolves when A resolves with seeing. Poor transparency during the observation

BU525

7m5

0.5''

276°

2018

Ari

02h58m53.11s

+21°37'03.90"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Star is decidedly not round but does not show shape other than a stretching.

STF333, eps Ari

5m2

5m6

1.4''

211°

2018

Ari

02h59m12.73s

+21°20'25.60"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Equal bright white just split with seeing.

STF331

5m2

6m2

11.8''

86°

2018

Per

03h00m52.18s

+52°21'06.50"

Robert Zebahl Leipzig (Germany)	63mm (46x)	Easy to separate with relatively large difference in brightness.
Rene Merting Drachhausen (Germany)	100mm (20x)	bei 32x ein feines Pärchen, besser als knapp getrennt und richtig hell - Komponente A im Osten ist rein weiß, B dagegen in einem eigenartigen kupfer-weiß, wenn man das so sagen kann - bei 20x passt nur noch ein dünnes Blatt Papier zwischen die beiden Sterne
Uwe Pilz Leipzig (Germany)	105mm (150x)	einfach
Mark McCarthy Fremont (California/USA)	203mm (333x)	Slightly yellow-white pair, wide, about 1.5 delta mag
Mark McCarthy Fremont (California/USA)	317mm (553x)	Yellow A. B ~1 D-mag.

STF336

7m0

8m3

8.7''

8°

2018

Per

03h01m29.07s

+32°24'45.80"

Mark McCarthy Fremont (California/USA)	203mm (333x)	Nice light orange and light blue stars, 1.5 delta mag, wide, ~9"
Mark McCarthy Fremont (California/USA)	317mm (553x)	Wide separation B orange A

STF337

8m0

9m3

17.6''

163°

2015

Per

03h02m16.79s

+41°23'45.70"

Rene Merting

Drachhausen (Germany)

100mm (32x)

bei 32x ein gut getrenntes Pärchen, Komponente B im SO ist deutlich schwächer, gerade so erkennbar - deshalb wirkt B auch farblos gegen die weiße Komponente A

STF346, 52 Ari

AB-C

5m5

10m8

5.1''

358°

2005

Ari

03h05m26.69s

+25°15'18.70"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Bright yellow-white AB, orange C. ~4-5 delta mag, 5-6" PA to N. Did not notice AB 0.5"

ES558

7m7

10m6

8.5''

0°

2010

Per

03h06m47.76s

+45°45'02.80"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Yellow-orange star with very faint bluish companion, 5", 2-3 delta mag.

STF360

8m0

8m3

2.7''

126°

2015

Per

03h12m09.59s

+37°13'03.30"

Robert Zebahl Leipzig (Germany)	70mm (67x)	Pretty faint double star. At 57x barely separable with almost touching diffraction disks. The components seemed similarly bright. At 67x still very close together, at 100x easy to separate.
Robert Zebahl Leipzig (Germany)	152mm (69x)	Split, but close together, similarly bright. The double star appears overall slightly orange compared to the surrounding stars.

★★

STT51

8m5

8m7

0.6''

346°

2018

Per

03h12m57.08s

+44°17'14.70"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Very fine clean split at the finest moments, which is once every 10 seconds. 0.5", equal mag.

HU544

6m7

8m2

1.7''

103°

2018

Per

03h15m48.70s

+50°57'21.20"

Robert Zebahl Leipzig (Germany)	70mm (133x)	Clearly seen as figure '8' with noticeable difference in brightness.
Uwe Pilz Leipzig (Germany)	105mm (196x)	klebt am ersten Ring
Uwe Pilz Leipzig (Germany)	105mm (260x)	im ersten Ring
Robert Zebahl Leipzig (Germany)	152mm (129x)	Wonderfully separated in equally beautiful star surroundings! Clear difference in brightness visible. To the east there is a brighter star, which shines yellowish-orange. HU544 itself seems rather cool in color.

STF369

6m8

7m7

3.6''

29°

2016

Per

03h17m11.45s

+40°28'58.60"

Robert Zebahl Leipzig (Germany)	70mm (57x)	At 44x still separable with noticeable difference in brightness. At 57x well separable, whereby the components are still very close together. The difference in brightness is more clearly visible here.
Rene Merting Drachhausen (Germany)	100mm (64x)	bei 64x knapp getrennt - Komponente B im NO wirkt eine halbe Größenklasse schwächer - beide Sterne schneeweiß
Robert Zebahl Leipzig (Germany)	152mm (100x)	Easily separable with clear difference in brightness. In terms of color, both components appeared slightly different: white-yellowish, slightly orange.

STF375

7m6

9m9

2.7''

316°

2009

Ari

03h20m21.23s

+23°41'21.90"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

1.5" orange B, 3-4 delta mag. Nice.

COU259, tau 1 Ari

5m3

8m1

0.9''

217°

2016

Ari

03h21m13.63s

+21°08'49.50"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Tau Ari. Bright, barely oval. Marginal.

★

STF381

7m6

8m8

1.1''

109°

2018

Ari

03h23m19.33s

+20°58'13.90"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Orange-yellow with 2x fainter B, very close split, with seeing, tough one.

TOK13, UX Ari

6m6

10m0

95.6''

129°

2014

Ari

03h26m35.36s

+28°42'55.20"

Mark McCarthy Fremont (California/USA)	317mm (270x)	UX Ari: Orange star with very faint wide blue B
Mark McCarthy Fremont (California/USA)	317mm (553x)	Orange-yellow with very wide 2x fainter B

★

STF388

8m0

9m0

2.8''

214°

2018

Per

03h28m40.39s

+50°26'10.80"

Rene Merting Drachhausen (Germany)	100mm (107x)	bei 107x zeigt sich Komponente B südlich von A und nur in guten Momenten sind beide Sterne knapp getrennt zu sehen
Mark McCarthy Fremont (California/USA)	317mm (553x)	Pretty blue and a little red pair, 1.5 delta mag. On the northern edge of Stock 1.

STF391

7m6

8m3

3.9''

96°

2018

Per

03h29m13.74s

+45°02'57.50"

Robert Zebahl Leipzig (Germany)	70mm (57x)	Clearly split, but close together, moderate difference in brightness. The double star is located in a very beautiful star field with some of the stars appearing colored, but this only came into its own at low magnification.
Robert Zebahl Leipzig (Germany)	152mm (69x)	Easy to separate with moderate difference in brightness. Slight difference in color: white-yellowish, slightly orange.

BU1179, 34 Per

4m7

7m3

0.6''

141°

2016

Per

03h29m22.05s

+49°30'32.20"

Mark McCarthy

Fremont (California/USA)

317mm (885x)

Uncertain but can't resolve even at 885x

STF343

8m4

9m8

35.3''

327°

2015

Cep

03h29m50.94s

+84°02'19.70"

8m4

12m9

90.5''

309°

2015

Rene Merting Drachhausen (Germany)	100mm (20x)	AB: bei 32x sind zwei schwache Sterne mit ordentlichem Abstand erkennbar - Komponente B ist eine Größenklasse schwächer und leicht grau-braun - zurück auf 20x ist B noch gerade so zu erkennen und wirkt nun etwas weißer
Rene Merting Drachhausen (Germany)	320mm (72x)	AB: bei 72x üppig getrennt, ein Pärchen mit schönem Farbkontrast, Komponente A strahlt weiß, B orangebraun AC: bei 72x ist nordwestlich über AB in dreifacher Entfernung Komponente C zu erkennen - C ist nochmal deutlich schwächer als B

STF389

6m4

7m9

2.6''

72°

2018

Cam

03h30m10.93s

+59°21'57.80"

Uwe Pilz Leipzig (Germany)	60mm (198x)	Ein Hauch mit einem Abstand von 0,4 Beugungsscheibendurchmesser, sehr schwierig. Einfach bei 105mm
Robert Zebahl Leipzig (Germany)	70mm (133x)	Easy to find and separated at 67x, but very tight. Easily separable at 133x, still relatively tight together with significant difference in brightness.

STFA7

7m4

7m8

44.1''

234°

2017

Tau

03h31m03.47s

+27°43'53.60"

Mark McCarthy Fremont (California/USA)	80mm (13x)	Nice finder split, equal mag but faint, ~8th mag.
Mark McCarthy Fremont (California/USA)	80mm (13x)	Pretty finder split.
Uwe Pilz Leipzig (Germany)	105mm (288x)	gleichhell, einfach
Robert Zebahl Leipzig (Germany)	120mm (18x)	Well split with noticeable difference in brightness. Nice view together with the double star STF401 located southeast.

STF401

6m6

6m9

11.5''

270°

2018

Tau

03h31m20.76s

+27°34'18.50"

Christopher Hay Seeheim (Germany)	18x80	Cleanly split. Supplemented nicely by the wide pair STFA7 directly north, in very star-poor surroundings in 4° FOV.
Uwe Pilz Leipzig (Germany)	105mm (288x)	ein Hauch schwärze dazwischen
Robert Zebahl Leipzig (Germany)	120mm (18x)	Barely split at 18x. At 40x difference in brightness is visible. Nice view together with the double star STFA7 located northwest.
Mark McCarthy Fremont (California/USA)	317mm (270x)	equal mag, white, well separated.
Mark McCarthy Fremont (California/USA)	317mm (553x)	Near equal white ~7", nice, W-E. Forms a double-double in wider FOV with STF 375.

STF396

6m4

7m7

20.5''

245°

2018

Cam

03h33m32.19s

+58°45'55.30"

Rene Merting

Drachhausen (Germany)

18x70

in diesem FG ein schönes enges (knapp getrenntes) Paar - B steht südwestlich, weil beide Sterne so eng stehen, ist der Helligkeitsunterschied schwer abschätzbar, ich denke 1 bis 1.5 Größenklassen

STF412, 7 Tau

6m6

6m9

0.8''

349°

2018

Tau

03h34m26.62s

+24°27'52.10"

Uwe Pilz

Leipzig (Germany)

105mm (260x)

A-B länglich

★

BU533

7m5

7m7

1.0''

222°

2018

Per

03h35m37.81s

+31°40'48.70"

Robert Zebahl Leipzig (Germany)	152mm (225x)	At 129x clearly elongated, notched. At 225x just so separable with similarly bright components.
Mark McCarthy Fremont (California/USA)	317mm (270x)	Overlapping yellow-orange disks, equal mag

S430

7m2

7m5

41.0''

96°

2017

Per

03h38m18.83s

+44°48'06.50"

Rene Merting

Drachhausen (Germany)

16x70

ein schöner Fernglas-Stern - beide Komponenten sind hell genug und stehen weit genug auseinander - sie sind mehr als ordentlich getrennt - die B-Komponente im Osten wirkt ein bisschen wärmer im Farbton

STTA36

A-BC

6m9

8m3

45.9''

72°

2018

Cam

03h39m58.81s

+63°52'13.40"

Rene Merting

Drachhausen (Germany)

18x70

ein mehr als gut getrenntes Pärchen mit einem leichten Farbkontrast - Komponente B im Westen ist gut eine Größenklasse schwächer und wirkt graublau - A hat sich wie meist gut die Zähne geputzt, strahlend weiß - übrigens auch ein schöner Kontrast mit dem ebenfalls im Gesichtsfeld stehenden etwas mehr als 1° südlich befindlichen Stern U Cam, der knallig orange strahlt

STF425

7m5

7m6

1.9''

59°

2018

Per

03h40m07.24s

+34°06'59.30"

Robert Zebahl

Leipzig (Germany)

152mm (129x)

Beautifully separated, relatively close together, very little difference in brightness.

STF427, V1268 Tau

7m4

7m8

7.0''

207°

2016

Tau

03h40m38.77s

+28°46'24.00"

Mark McCarthy Fremont (California/USA)	80mm (13x)	V1268: Wide near equal orange in finder. Loses its color when viewed in the scope under high magnification.
Robert Zebahl Leipzig (Germany)	120mm (40x)	At 40x barely split. At 75x easily split with visible difference in brightness.
Mark McCarthy Fremont (California/USA)	317mm (270x)	Near equal mag, white and fainter B is yellow, well split.

STT59

7m9

8m8

2.8''

356°

2018

Per

03h40m40.62s

+46°01'24.10"

Robert Zebahl Leipzig (Germany)	70mm (67x)	Already separable at 67x, but very tight. Easy to separate at higher magnification. Difference in brightness clearly visible.
Robert Zebahl Leipzig (Germany)	152mm (100x)	Nicely separated, but close together. Primary component appears rather whitish, companion darker with a hint of orange.

STF431, 40 Per

5m0

10m0

19.8''

244°

2010

Per

03h42m22.64s

+33°57'54.10"

Mark McCarthy

Fremont (California/USA)

317mm (270x)

Wide, 2 delta mag, white-yellow and very faintly blue

WEB2

5m7

8m4

54.9''

37°

2018

Cam

03h42m42.73s

+59°58'09.80"

Rene Merting

Drachhausen (Germany)

18x70

ein komfortabel getrenntes sehr ungleiches Paar - Komponente A im Südwesten ist hell und cremegelb - Komponente D muss mindestens 3 Größenklassen schwächer sein und wirkt dadurch wie eine graue Maus

STF419

7m8

2.9''

73°

2018

Cam

03h42m45.19s

+69°50'44.30"

Robert Zebahl

Leipzig (Germany)

70mm (67x)

Separated, but tight with equally bright components. Beautiful sight.

STF435

7m2

8m9

13.2''

3°

2015

Tau

03h43m06.52s

+25°40'52.90"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Wide orange and blue, 2 delta mag. Nice big orange finder split 1 degree to the north from here, one of which has a faint wide pair when viewed through the telescope.

HJL1024

8m0

9m6

196.7''

175°

2015

Tau

03h43m41.53s

+23°38'56.90"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Very wide faint companion, ~3 delta mag.

STF437

9m8

10m0

11.2''

310°

2015

Per

03h44m09.15s

+32°07'09.30"

Uwe Pilz

Leipzig (Germany)

105mm (88x)

einfach

★★

BU535, omicron Per, 38 Per, Atik

3m9

6m7

1.1''

20°

2015

Per

03h44m19.13s

+32°17'17.70"

Uwe Pilz Leipzig (Germany)	105mm (88x)	=omikron Per, in IC348, lohnend!
Robert Zebahl Leipzig (Germany)	152mm (300x)	In steady moments the faint companion is clearly recognizable as a small brightening in the first diffraction ring of the primary component.
Mark McCarthy Fremont (California/USA)	317mm (270x)	No split at 270x

HU103

8m7

8m9

1.2''

203°

2018

Per

03h45m22.61s

+49°51'42.40"

Robert Zebahl

Leipzig (Germany)

152mm (225x)

At 100x slightly elongated, at 129x elongated, notched. At 225x clearly separated, but tight with little difference in brightness.

★★

BU536 & S437, SAO76169

S437

AB-C

8m1

7m7

38.8''

308°

2017

Tau

03h46m16.00s

+24°11'23.50"

BU536

8m1

9m4

1.1''

178°

2016

BU536

7m7

12m9

18.3''

5°

2015

Uwe Pilz

Leipzig (Germany)

105mm (288x)

in den Plejaden

STF450

7m3

9m4

5.8''

263°

2017

Tau

03h47m24.41s

+23°54'52.80"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Easy yellow-blue 5” 1.5 delta mag.

STF448

6m7

9m4

3.5''

13°

2016

Per

03h47m52.66s

+33°35'59.50"

Mark McCarthy

Fremont (California/USA)

317mm (270x)

2 delta mag 5" separated white and a little green-blue B

STT63

6m2

11m2

6.7''

269°

2016

Per

03h48m18.08s

+50°44'12.40"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Nice white disk with slightly blue haze 6" out but not resolved to point due to poor transparency.

HU1067, XY Per

9m7

10m6

1.3''

77°

2015

Per

03h49m36.35s

+38°58'55.50"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Light orange star, small, definitely elongated at 553x. Seems to resolve in best moments to a very faint B star, but uncertain. Very faint in the finder, at its limit.

STT64

6m8

10m2

3.3''

235°

2014

Tau

03h49m58.06s

+23°50'55.30"

Mark McCarthy

Fremont (California/USA)

317mm (270x)

Light orange star with 3-4 delta mag, ~3" separated companion, white

GRV195

8m0

11m1

60.8''

330°

2014

Tau

03h51m20.24s

+26°21'13.60"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Wide separation, 2 delta mag. Did not see elongation in A for A1830AB

STT66

8m1

8m5

1.0''

146°

2018

Per

03h52m04.69s

+40°47'50.70"

Mark McCarthy Fremont (California/USA)	317mm (270x)	light orange equal magnitude, split with seeing, close ~1"
Mark McCarthy Fremont (California/USA)	317mm (277x)	Wide separation orange stars of similar brightness

HJ3253

8m1

9m7

31.9''

73°

2015

Tau

03h52m10.39s

+26°13'53.00"

Rene Merting

Drachhausen (Germany)

18x70

Komponente B zeigt sich schwach aber gut getrennt östlich von A - mindestens 1.5 Größenklassen Helligkeitsunterschied

STF464, zeta Per, 44 Per

2m9

9m2

12.9''

209°

2012

Per

03h54m07.92s

+31°53'01.20"

2m9

11m2

33.3''

286°

2012

2m9

10m4

98.6''

195°

2012

2m9

10m0

120.0''

186°

2012

Robert Zebahl Leipzig (Germany)	102mm (106x)	AB: Easy to separate, but the B component appeared only as a very faint, tiny companion.
Mark McCarthy Fremont (California/USA)	317mm (270x)	AB: Triple system, 2 very faint stars nearby. Did not see BU 535 1.1" 3 delta mag, the second star I saw not in system

★★★

STF470, 32 Eri

4m8

5m9

6.9''

349°

2018

Eri

03h54m17.49s

-02°57'17.00"

Robert Zebahl Leipzig (Germany)	55mm (27x)	At 27x split, but still tight with noticeable difference in brightness. A slight difference in colors could be seen. At 56x the color difference was very evident: The brighter component appeared slightly yellowish, the fainter one slightly bluish. Highly recommended! The sketch was done few days later during another observation.
Uwe Pilz Leipzig (Germany)	105mm (288x)	Farbkontrast, gelborange-blauweiß

STF471, epsilon Per, 45 Per

2m9

8m9

9.1''

10°

2015

Per

03h57m51.22s

+40°00'36.90"

Robert Zebahl

Leipzig (Germany)

63mm (46x)

Easy to separate, but much fainter, second component, which appears as a small, faint spot. Nice view.

STT68, IQ Per

7m8

9m2

39.1''

176°

2015

Per

03h59m44.66s

+48°09'04.60"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Pretty, close split in 80mm finder. Nice & wide 1 delta mag in scope. Is IQ Per

STF479

6m9

7m8

7.5''

127°

2018

Tau

04h00m56.81s

+23°12'05.40"

6m9

9m4

57.7''

243°

2018

Robert Zebahl Leipzig (Germany)	102mm (28x)	Components A & B clearly separated with visible difference in brightness. Noticeably fainter component C much wider apart. All three components form an obtuse triangle.
Robert Zebahl Leipzig (Germany)	152mm (49x)	Nice view. All three components easy to separate. A: white-yellowish; B: creamy white.
Robert Zebahl Leipzig (Germany)	200mm (37x)	AB: Nice, evident double star, easy to split. Slight difference in brightness.
Mark McCarthy Fremont (California/USA)	317mm (207x)	AB: Wide separation but closer than the AC, about half a delta mag.
Mark McCarthy Fremont (California/USA)	317mm (207x)	AC: 2x fainter than A star, and much wider than AB separation.

STF483

7m4

9m3

1.6''

53°

2018

Per

04h04m07.10s

+39°30'35.00"

Mark McCarthy

Fremont (California/USA)

317mm (270x)

Yellow-orange star, very close, 1", 2 delta mag.

STT558, 37 Tau

4m5

10m0

135.0''

194°

2013

Tau

04h04m41.71s

+22°04'54.90"

Mark McCarthy

Fremont (California/USA)

317mm (207x)

37 Tau: Orange star with much fainter wide pair

STT531, 50 Per

7m3

9m7

2.7''

353°

2018

Per

04h07m34.35s

+38°04'28.30"

Mark McCarthy

Fremont (California/USA)

317mm (270x)

AC is a finder split. The fainter of these has another star split 4", 2-3 delta mag., this is the AB pair.

SZ Cam, STF485

6m9

18.0''

306°

2018

Cam

04h07m51.38s

+62°19'48.40"

Robert Zebahl Leipzig (Germany)	8x40	Split, but very tight with equally bright components. I used a tripod.
Rene Merting Drachhausen (Germany)	18x70	die beiden hellen Sterne im OS 1502 - knapp getrennt, gleich hell - es würde noch genau ein solch heller Stern zwischen die beiden passen
Robert Zebahl Leipzig (Germany)	70mm (15x)	Easily split with nearly equally bright components. Located in the center of the open cluster NGC1502. Very nice view.

★

STF494

7m5

7m7

5.3''

188°

2018

Tau

04h08m53.50s

+23°05'55.10"

Robert Zebahl Leipzig (Germany)	102mm (62x)	At 28x separated, but very tight, similarly bright, both whitish. At 62x easy to separate, little difference in brightness and color: slightly orange; white-bluish. 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-bluish. Color impression slightly more intense at 100x. Beautiful sight.

STF3114

7m7

9m6

3.1''

157°

2018

Per

04h09m10.26s

+40°09'40.50"

Mark McCarthy

Fremont (California/USA)

317mm (270x)

Pretty light yellow star with 2 delta mag orangish B, ~3"

STF500

8m8

10m7

4.0''

79°

2018

Per

04h11m41.62s

+40°15'54.70"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

1 delta mag, ~4", very hazy.

★

omicron 2 Eri, 40 Eri, STF518

A-BC

4m4

9m3

83.7''

102°

2016

Eri

04h15m16.32s

-07°39'10.30"

9m5

11m2

8.3''

331°

2017

Uwe Pilz

Leipzig (Germany)

105mm (244x)

A ist gelblich. B fiel sofort ins Auge, auch bei 144x. C war extrem schwierig. A musste außerhalb des Gesichtsfeldes stehen, aber auch dann war er nur indirekt sichtbar. Dann aber überraschte der verhältnismäßig große Abstand B-C. ~ A ist ein Hauptreihenstern ähnlich der Sonne. B ist ein weißer Zwerg, einer der hellsten am Himmel. C ist ein Roter Zwerg, davon gibt es nicht viele in der Reichweite kleiner Instrumente. Insgesamt hat man drei Zwergsterne auf einen Blick: Einen gewöhnlichen (=Hauptreihen-) Zwerg, einen weißen und einen roten.

../projects/double-stars/uwe-pilz/sketches/200120_40Eri.jpg

Berthold Fuchs

Wiesbaden (Germany)

130mm

A-BC: Triplesystem with a white Dwarf

../projects/double-stars/berthold-fuchs/photographs/Keid.png

HO328

7m4

9m1

0.4''

358°

2016

Tau

04h17m01.22s

+19°40'32.60"

Mark McCarthy Fremont (California/USA)	317mm (553x)	Olive shape. Light yellow-orange star, no clean split but clearly elongated.
Mark McCarthy Fremont (California/USA)	317mm (553x)	Very faint, very close ~0.8", emerges with seeing, hair split. Marginal

LDS5535

5m0

9m6

179.9''

118°

2015

Tau

04h17m15.69s

+20°34'43.50"

Mark McCarthy

Fremont (California/USA)

80mm (13x)

Omega Tau: very wide finder split, 2 delta mag.

★

STF520

8m3

8m4

0.7''

81°

2018

Tau

04h18m14.55s

+22°48'24.60"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Faint elongated to overlapping disks.

BU310

7m1

12m6

18.9''

173°

2015

Per

04h22m00.26s

+39°56'03.30"

Mark McCarthy

Fremont (California/USA)

317mm (270x)

The pair is one or both of two faint widly separated stars, makes a triangle. A is light orange.

BU87

6m2

8m6

1.9''

167°

2012

Tau

04h22m22.74s

+20°49'16.40"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Orange star with 1.5" blue 3 delta mag pair. Definite disks, well split, round with seeing.

STT82

7m3

8m6

1.2''

327°

2018

Tau

04h22m44.10s

+15°03'22.10"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Very close, 0.8" 1.5 delta mag, PA to N/NW.

STF533

7m3

8m5

20.2''

61°

2017

Per

04h24m24.85s

+34°18'53.10"

Mark McCarthy

Fremont (California/USA)

80mm (13x)

Finder split, fairly wide, 1 delta mag

STT81, 56 Per

5m8

9m2

4.2''

13°

2017

Per

04h24m37.46s

+33°57'34.90"

Mark McCarthy

Fremont (California/USA)

317mm (270x)

56 Per. Pretty yellow and slight red pair, 2 delta mag.

STF546

7m9

9m2

6.8''

181°

2015

Tau

04h27m00.62s

+19°07'03.60"

Uwe Pilz

Leipzig (Germany)

105mm (144x)

../projects/double-stars/uwe-pilz/sketches/200115stf546.jpg

STF545

6m9

8m8

18.5''

58°

2016

Tau

04h27m04.85s

+18°12'27.10"

Uwe Pilz Leipzig (Germany)	105mm (288x)	Begleiter schwach, erfordert sehr hohe Vergrößerung. Hauptstern weiß
Mark McCarthy Fremont (California/USA)	317mm (553x)	Wide, white, 1.5 delta mag.
Mark McCarthy Fremont (California/USA)	317mm (553x)	Blush white, ~2 delta mag, PA to NE, wide separation.

BGH2, V921 Tau

7m0

9m1

109.5''

9°

2015

Tau

04h29m30.35s

+17°51'47.40"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

White, wide, 1 delta mag.

STF554, 80 Tau

5m7

8m1

1.5''

16°

2015

Tau

04h30m08.60s

+15°38'16.20"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

1" 2 delta mag, PA N. Nice!

LDS2246

4m8

6m5

250.3''

131°

2014

Tau

04h30m33.63s

+16°11'38.50"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

A star is white, bright, perfect disk, the pair very wide, 2 delta mag.

★★

STF559

7m0

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
Robert Zebahl Leipzig (Germany)	152mm (69x)	Beautiful sight, similar bright components, pretty tight.

SHJ45, 88 Tau

4m3

7m8

69.2''

300°

2017

Tau

04h35m39.23s

+10°09'39.30"

Sarah Gebauer

Germany

150mm (30x)

mit freiem Auge als ein Stern erkannt, bei 30x sauber getrennt mit sichtbarem Helligkeitsunterschied

../projects/double-stars/sarah-gebauer/sketches/20191230%2088%20Tau%20DSk.jpg

STFB2, alp Tau

0m8

11m3

136.5''

31°

2016

Tau

04h35m55.24s

+16°30'33.50"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Aldebaran: Very bright orange with a lot of glare, but there is a steady faint star halfway to the field stop

STTA53

7m5

7m6

78.8''

352°

2017

Tau

04h37m26.72s

+00°33'11.20"

Mark McCarthy

Fremont (California/USA)

80mm (13x)

Finder split, 1 delta mag. White and dully yellow.

STF572

7m4

7m2

4.4''

189°

2018

Tau

04h38m29.58s

+26°56'25.60"

Robert Zebahl

Leipzig (Germany)

70mm (57x)

Clearly separated, easy with beautiful color contrast: A slightly orange, B white.

S455, tau Tau, 94 Tau

4m2

7m0

62.5''

214°

2017

Tau

04h42m14.70s

+22°57'25.10"

Sarah Gebauer Germany	150mm (26x)	schon bei 26x deutlich getrennt
Sarah Gebauer Germany	150mm (30x)	mit freiem Auge als ein Stern gesehen, bei 30x weit getrennt, eine Komponente ist deutlich heller als die andere

LDS2266

7m2

10m2

141.7''

103°

2015

Tau

04h42m51.64s

+18°43'14.40"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Orange, with a very wide 2 delta mag pair.

STTA55

8m2

9m2

37.4''

17°

2015

Ori

04h49m07.80s

+05°12'30.70"

Rene Merting

Drachhausen (Germany)

100mm (20x)

bei 32x ein schön weit auseinander stehendes filigranes Sternpaar - Komponente B im NO wirkt eine halbe Größenklasse schwächer, das Weiß nicht ganz so klar wie bei A - zurück auf 20x ist das Paar nicht mehr ganz so klar im Umfeld, kann aber weiterhin gut getrennt gesehen werden

STF612

8m3

8m4

16.1''

200°

2015

Ori

04h54m16.64s

+07°22'22.90"

Rene Merting Drachhausen (Germany)	18x70	ein sehenswerter Fernglas-Doppelstern, zumindest bei 18-facher Vergrößerung - ein schön eng stehendes knapp getrenntes Pärchen zweier gleich heller Sterne
Rene Merting Drachhausen (Germany)	100mm (20x)	bei 32x ein schickes Paar gut getrennter eng stehender Sterne - Komponente B im Süden wirkt etwas dunkler/dumpfer - das Sternpaar wirkt wie allein gelassen im Umfeld - zurück auf 20x ist die Trennung zwischen beiden Sternen ganz knapp zu erkennen

62 Eri, SHJ48

5m5

8m9

66.1''

76°

2013

Eri

04h56m24.19s

-05°10'16.90"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

White stars, pretty wide 2 delta mag, PA to west. Did not notice Aa-Ab 0.6"

STF622

8m5

8m6

2.5''

163°

2018

Ori

04h58m06.20s

+01°40'31.60"

Rene Merting

Drachhausen (Germany)

100mm (107x)

bei 107x ein ganz knapp getrenntes Pärchen in Nordsüd-Ausrichtung - beide Sterne sind gleich hell bzw. gleich schwach - schwer

★★

STF616, omega Aur, 4 Aur

5m0

8m2

4.7''

4°

2015

Aur

04h59m15.41s

+37°53'24.90"

Robert Zebahl Leipzig (Germany)	70mm (57x)	Easy, still relatively tight with a large difference in brightness. Component A appeared pretty bright and white-yellowish, while B appeared only as a tiny star. Very nice sight.
Uwe Pilz Leipzig (Germany)	105mm (88x)	blau und weiß
Uwe Pilz Leipzig (Germany)	105mm (144x)	gelb. Schöner Helligkeitskontrast, dabei aber einfach. Auch bei 88x trennbar
Mark McCarthy Fremont (California/USA)	203mm (113x)	Omega Aurigae. The A was a surprising sickly blue-green color, and the B was a tawny brown, nicely split 5" away.

STF623

7m0

8m7

20.5''

207°

2018

Tau

04h59m53.75s

+27°19'32.20"

Uwe Pilz

Leipzig (Germany)

105mm (88x)

erkennbar bei 21x

../projects/double-stars/uwe-pilz/sketches/200215_Struve623.jpg

STT92, 5 Aur

6m0

9m5

4.1''

285°

2017

Aur

05h00m18.35s

+39°23'40.90"

Uwe Pilz Leipzig (Germany)	105mm (160x)	schwierig
Uwe Pilz Leipzig (Germany)	105mm (288x)	Nur bei sehr hoher Vergrößerung überhaupt zu trennen, schwierig

STF627

6m6

7m0

21.3''

261°

2018

Ori

05h00m33.93s

+03°36'56.80"

Rene Merting Drachhausen (Germany)	18x70	zwei klar sichtbare bequem getrennte Sterne - Komponente B im SW wirkt leicht gelblicher als A - maximal 1/4 Größenklasse Helligkeitsunterschied - ein schöner nicht zu eng und nicht zu weit getrennter Fernglas-Doppelstern
Rene Merting Drachhausen (Germany)	100mm (20x)	bei 32x ein bequem getrenntes Pärchen zweier annähernd gleich heller Sterne - Komponente B im Westen ist vielleicht eine viertel Magnitude schwächer - das Sternpaar fällt auf in der Umgebung, weil es kaum hellere Sterne im Umfeld gibt - zurück auf 20x ist es ein schickes eng stehendes Paar, aber nicht zu eng

STF630

A-BC

6m5

7m7

14.6''

50°

2018

Ori

05h02m00.03s

+01°36'31.90"

Rene Merting Drachhausen (Germany)	18x70	schick, ein auffälliges knapp getrenntes Pärchen - Komponente B im NO ist keine ganze Größenklasse schwächer (lt. Stelle Doppie aber doch 1.21 mag)
Rene Merting Drachhausen (Germany)	100mm (20x)	bei 32x ein knapp getrenntes Pärchen - Komponente BC im NO scheint eine knappe Größenklasse schwächer, er wirkt ein wenig bunter, matter - zurück auf 20x wirkt das Pärchen schicker, weil die beiden Komponenten dann noch enger stehen - der Helligkeitsunterschied ist nicht mehr ganz so ausgeprägt

STF636

7m1

8m5

3.7''

104°

2017

Eri

05h03m01.95s

-08°39'47.40"

Rene Merting Drachhausen (Germany)	100mm (107x)	erst bei 107x offenbart der Doppelstern seinen Begleiter östlich von Komponente A - knappe Trennung nur mit viel Konzentration erkennbar
Mark McCarthy Fremont (California/USA)	317mm (277x)	Faint, small, close pair, white and orange, 2 delta mag, PA to east. Nice tight pair but still well split.

WDK1

10m0

13m7

5.6''

279°

2015

Cam

05h03m23.90s

+53°07'42.50"

Robert Zebahl

Leipzig (Germany)

70mm (67x)

The double star could not be identified at magnifications between 67x and 133x even with a finder chart.

S459, bet Cam

4m1

7m4

84.2''

209°

2017

Cam

05h03m25.10s

+60°26'32.20"

Rene Merting

Drachhausen (Germany)

320mm (45x)

bei 45x eine wunderschöne A-Komponente, ein strahlendes Mais- Gelb - die B-Komponente weit abgesetzt im SW ist mindestens 2 Größenklassen schwächer (3.32 mag lt. Stelle Doppie), Farbeindruck weißgrau

J307

A-BC

6m8

9m3

53.4''

320°

2018

Ori

05h03m42.85s

-02°32'23.90"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Orange star, very wide B, 1 delta mag to the NNW. Did not see BC 0.3"

66 Eri, STF642

5m1

10m8

52.2''

10°

2011

Eri

05h06m45.65s

-04°39'18.60"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Bright white with much fainter star to the NW, very wide split.

STF649

5m8

9m0

21.3''

69°

2017

Eri

05h08m20.18s

-08°39'55.10"

Rene Merting Drachhausen (Germany)	100mm (20x)	bei 32x üppig getrennt - Komponente B im NO ist sehr schwach erkennbar und mindestens 2.5 Größenklassen schwächer (3.2 mag sogar lt. Stelle Doppie) - A weiß, B kommt über graubraun nicht hinaus - zurück auf 20x ist B weiterhin noch einigermaßen erkennbar, die Trennung etwas weniger üppig
Mark McCarthy Fremont (California/USA)	317mm (277x)	Yellow A, red B, ~3 delta mag, well split.

STF645

A-BC

6m0

9m1

11.3''

29°

2017

Tau

05h09m45.06s

+28°01'50.20"

Uwe Pilz Leipzig (Germany)	105mm (88x)
Mark McCarthy Fremont (California/USA)	317mm (270x)	White and grey, 2 delta mag, wide. BC is BU 1047 0.3" near equal, but not seen

BGH21

7m0

9m3

314.6''

353°

2015

Tau

05h10m03.87s

+27°33'23.40"

Mark McCarthy

Fremont (California/USA)

317mm (270x)

Yellowish-white star, the pair the faint, very wide star seen in the scope and finder.

★★

STF644

7m0

6m8

1.6''

221°

2019

Aur

05h10m18.81s

+37°18'06.70"

Robert Zebahl Leipzig (Germany)	70mm (100x)	At 57x slightly elongated with a partially visible notching. At 100x & 133x two clearly overlapping diffraction disks are visible as figure '8' with a small difference in brightness.
Robert Zebahl Leipzig (Germany)	102mm (129x)	Grand sight! Two almost touching diffraction disks, slight difference in brightness, both slightly yellowish.
Uwe Pilz Leipzig (Germany)	105mm (200x)	Beide Orange, mit schwarzem Zwischenraum. Lohnend
Robert Zebahl Leipzig (Germany)	152mm (129x)	Great view, easy to separate, but still quite close together with low difference in brightness. Both components appeared slightly orange.

STF648

8m1

8m9

4.7''

62°

2019

Aur

05h10m59.19s

+32°02'19.50"

Robert Zebahl Leipzig (Germany)	55mm (40x)	At 40x tight with obviously fainter component.
Robert Zebahl Leipzig (Germany)	70mm (33x)	Separated, but tight with noticeable difference in brightness.
Uwe Pilz Leipzig (Germany)	105mm (144x)	beide Komponenten gelb
Mark McCarthy Fremont (California/USA)	317mm (270x)	Light orange, half delta mag, wide.

STF652

6m3

7m4

1.7''

180°

2017

Ori

05h11m45.35s

+01°02'12.50"

Uwe Pilz Leipzig (Germany)	105mm (260x)	Länglich, 0“7
Mark McCarthy Fremont (California/USA)	203mm (333x)	Very nice light orange A and greenish blue B, well split ~1.5", 2 delta

STF655, iot Lep

4m5

9m9

12.0''

337°

1998

Ori

05h12m17.89s

-11°52'08.90"

Rene Merting

Drachhausen (Germany)

100mm (32x)

hier habe ich mich täuschen lassen von einem weiter entfernt stehenden Stern nordöstlich, den ich für die B-Komponente gehalten habe - bei 32x und bei 64x konnte ich den im Nachgang recherchierten wesentlich schwächeren Begleiter in nur 12" Abstand allerdings nicht ausmachen

STF661, kappa Lep

4m4

6m8

2.2''

357°

2008

Lep

05h13m13.87s

-12°56'26.40"

Mark McCarthy

Fremont (California/USA)

371mm (553x)

~3-4 delta mag! ~1.5-2”, B in A’s diffraction.

STF654, rho Ori

4m6

8m5

6.4''

65°

2018

Ori

05h13m17.48s

+02°51'40.50"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Rho Ori Bright light orange-yellow A star with 3 delta mag yellow-white B, ~5"

STT517

6m8

7m0

0.7''

241°

2018

Ori

05h13m31.55s

+01°58'03.70"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Consistently split but images are bloated by poor seeing, yellowish white stars, <1", near equal

STF668, 19 Ori, beta Ori, Rigel

A-BC

0m3

6m8

9.7''

202°

2017

Ori

05h14m32.27s

-08°12'05.90"

Robert Zebahl Leipzig (Germany)	55mm (83x)	The second component was immediately seen as faint companion.
Robert Zebahl Leipzig (Germany)	70mm (67x)	First attempt at 133x: much fainter component clearly visible as a tiny star at a relatively large distance. After that the visibility was easy even at 67x. At 44x the faint component could only be guessed.
Robert Zebahl Leipzig (Germany)	102mm (160x)	Much fainter companion immediately visible as tiny star far outside the diffraction pattern of the primary component.
Uwe Pilz Leipzig (Germany)	105mm (288x)	zwei Ringe und zahlreiche radiale Strahlen um den Hauptstern

STF667

7m2

8m8

4.2''

316°

2018

Ori

05h14m41.31s

-07°04'18.10"

Rene Merting Drachhausen (Germany)	100mm (107x)	bei 64x stehen beide Sterne noch eng aneinander - ein Phänomen, Komponente A im SO ist nicht richtig weiß, die 1.5 mag schwächere Komponente B wirkt dagegen weiß, also trotz großem Helligkeitsunterschied sauberer weiß - erst bei 107x gelingt mir die sichere Trennung, kein Wunder bei dem schlechten Seeing heute
Mark McCarthy Fremont (California/USA)	371mm (553x)	Pretty orange A and 2x fainter B, which is a little blue-orange. 5”
Mark McCarthy Fremont (California/USA)	508mm (533x)	Orange and yellowish-blue B, ~5", 2 delta mag

STF664

7m8

8m4

4.8''

177°

2019

Ori

05h15m10.54s

+08°25'56.80"

Robert Zebahl Leipzig (Germany)	70mm (100x)	At 44x barely split. At 100x easily split with obvious difference in brightness.
Mark McCarthy Fremont (California/USA)	203mm (333x)	Near equal, well split, "headlights in fog" pair. Slightly yellow

BVD51

7m8

9m6

44.5''

317°

2016

Ori

05h15m23.69s

-03°21'57.40"

Mark McCarthy

Fremont (California/USA)

371mm (270x)

Wide, 2 delta mag pair, A star is slightly red.

★★

STF653, 14 Aur

5m0

10m9

9.8''

11°

2014

Aur

05h15m24.39s

+32°41'15.30"

5m0

7m3

14.2''

225°

2017

5m0

10m8

179.7''

322°

2010

Uwe Pilz Leipzig (Germany)	105mm (88x)	AC: heller Stern gelblich weiß
Mark McCarthy Fremont (California/USA)	317mm (270x)	AB: Triple, one of which is one delta mag fainter than the other equal pair. All well separated. [AC is the brighter pair, AB fainter.]
Mark McCarthy Fremont (California/USA)	317mm (270x)	AC: Triple, one of which is one delta mag fainter than the other equal pair. All well separated. [AC is the brighter pair, AB fainter.]

A2638

9m2

9m4

1.0''

280°

2017

Ori

05h15m52.51s

+03°44'55.70"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Tough pair in these conditions, moon haze. Slightly unequal and very close, resolves with seeing to two distinct faint points, but a haze around them

BU318

8m8

8m3

0.6''

264°

2017

Ori

05h16m14.58s

-03°28'59.10"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Elongation, certainly a pair, but not resolved

★

STF666

7m8

7m9

3.2''

75°

2019

Aur

05h17m05.80s

+33°19'47.20"

Robert Zebahl Leipzig (Germany)	55mm (83x)	At 40x slightly elongated, at 38x separated, but tight. Overall faint with components of similar brightness.
Robert Zebahl Leipzig (Germany)	70mm (57x)	Split, no difference in brightness and color. Very nice!

S473

7m0

8m5

20.6''

307°

2018

Lep

05h17m35.50s

-15°13'10.50"

Rene Merting

Drachhausen (Germany)

100mm (20x)

bei 32x leicht - Komponente A im SO zeigt sich gut getrennt von B im NW - Helligkeitsunterschied gut 1.5 bis 2 Größenklassen, dadurch leichter Farbkontrast - zurück auf 20x sind beide Sterne auch noch getrennt erkennbar, nun natürlich sehr eng stehend

STF678

9m1

9m4

3.6''

104°

2018

Ori

05h17m39.01s

+04°41'01.80"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Nice pair, near equal, pretty wide, nice view with seeing

A2639

8m6

9m7

0.8''

277°

2017

Ori

05h18m03.50s

+03°41'30.40"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Light white-yellow and 2 delta mag B, ~0.8"

STF669

8m4

9m0

9.9''

278°

2015

Aur

05h18m56.78s

+45°14'51.40"

Robert Zebahl

Leipzig (Germany)

55mm (25x)

Well separated with visible difference in brightness.

S476

6m3

6m5

39.3''

19°

2018

Lep

05h19m17.44s

-18°31'11.80"

Rene Merting

Drachhausen (Germany)

100mm (20x)

bei 32x adäquat getrennt, zwei gleich helle weiße Sterne - sehr auffällig im Umfeld - zurück auf 20x noch besserer Pärcheneindruck, knappe Trennung

STF688

7m5

10.7''

95°

2015

Ori

05h19m20.88s

-10°44'49.90"

Robert Zebahl Leipzig (Germany)	70mm (44x)	Clearly split with decent angular distance. Components appeared nearly equally bright.
Rene Merting Drachhausen (Germany)	100mm (32x)	bei 32x ein schön anzusehendes enges Pärchen - zwei unschuldig gleich helle weiß schimmernde Sterne in Ost-West-Ausrichtung - zurück auf 20x berühren sich die beiden Kügelchen hauchzart

STF692

AB-C

7m6

8m6

34.8''

4°

2017

Ori

05h20m24.16s

-08°01'47.00"

Rene Merting

Drachhausen (Germany)

100mm (20x)

bei 32x weit getrennt, Komponente AB im Süden ist knapp eine Größenklasse heller - AB weiß, C braungrau - das Paar ist auffällig, da es kaum vergleichbar helle Sterne im direkten Umfeld gibt - zurück auf 20x sind beide Sterne weiterhin ordentlich getrennt erkennbar, C wirkt jetzt nur noch grau, AB leicht gelblich

BU189

6m4

9m8

4.6''

285°

2002

Ori

05h20m26.41s

-05°22'03.10"

Mark McCarthy

Fremont (California/USA)

371mm (553x)

With good seeing and averted vision a 3x fainter point comes into view, can barely hold it, ~5”.

STF681

6m6

9m2

23.3''

183°

2017

Aur

05h20m39.16s

+46°57'49.60"

Uwe Pilz

Leipzig (Germany)

105mm (88x)

orange

../projects/double-stars/uwe-pilz/sketches/191216stf681.jpg

KU87

7m8

10m0

35.9''

104°

2015

Tau

05h21m39.91s

+18°54'24.50"

Rene Merting

Drachhausen (Germany)

18x70

eine echte Herausforderung - Komponente B taucht mit etwas Konzentration ganz schwach östlich von A auf - Komponente A ist schon relativ schwach, B ist schätzungsweise 2 Größenklassen schwächer

STT105

8m6

0.2''

122°

2000

Ori

05h21m40.47s

+12°40'06.20"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

very widely separated (11") orange pair. Pretty bright (7.3, 8.3).

STF684

7m7

9m3

1.5''

141°

2016

Aur

05h22m11.04s

+45°04'53.90"

Mark McCarthy

Fremont (California/USA)

317mm (270x)

Fine white and yellow, 2-3" at this scale, 2 delta mag. 20,000 light years distant, is actually quite a large distance for the average double star

STT106

7m1

10m1

9.5''

40°

2015

Ori

05h22m11.20s

+05°23'43.10"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

~4 delta mag B, wide, ivory color

STF696, 23 Ori

5m0

6m8

31.9''

30°

2018

Ori

05h22m50.00s

+03°32'40.00"

Rene Merting

Drachhausen (Germany)

18x70

ein auffälliges gut getrenntes Paar - Komponente B im Norden ist 1.5 Größenklassen schwächer

★

HU1225

7m8

11m0

3.4''

320°

1991

Ori

05h22m56.87s

+14°21'40.00"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Visible with 20" only, the B star is too faint for the 8" in these conditions. A is light orange, B a deeper orange compared with A, 4 delta mag and ~3.5"

STF700, V1804 Ori

7m7

7m9

4.8''

4°

2017

Ori

05h23m05.54s

+01°03'24.70"

Robert Zebahl Leipzig (Germany)	70mm (44x)	At 44x split, but very close together. At 100x clearly split with nearly equally bright components.
Mark McCarthy Fremont (California/USA)	508mm (533x)	V1804 Ori. Near equal white pretty wide

STT104

7m0

11m1

21.4''

190°

2014

Aur

05h23m12.61s

+47°01'17.90"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

Very wide separation (208"!) orange pair.

STF701

6m1

8m1

6.2''

139°

2018

Ori

05h23m18.50s

-08°24'55.90"

Rene Merting Drachhausen (Germany)	100mm (107x)	bei 107x ploppt südöstlich leicht abgesetzt von A die B-Komponente auf - A leuchtet weiß, B ist schwer zu sehen, also ohne Farbe
Mark McCarthy Fremont (California/USA)	371mm (553x)	White and rusty red color, ~6”, 1 delta mag.

STF697

7m3

8m1

25.9''

286°

2015

Ori

05h23m31.74s

+16°02'25.80"

Rene Merting

Drachhausen (Germany)

18x70

ein ordentlich getrenntes Pärchen - Komponente A strahlt weißgelblich, B im NW ist etwas mehr als eine halbe Größenklasse schwächer und wirkt kupfergrau

★★★

WNC2

A-BC

6m9

7m0

3.3''

158°

2018

Ori

05h23m51.32s

-00°51'59.80"

Robert Zebahl Leipzig (Germany)	70mm (44x)	Double star appeared elongated.
Rene Merting Drachhausen (Germany)	100mm (64x)	bei 64x ein extrem eng stehendes wunderschönes Pärchen zweier gleich heller gelber Sterne - keine 8 mehr, beide sind schon getrennt - bei 107x kommt etwas mehr Luft zwischen beide, aber sie scheinen auch ein wenig Farbe zu verlieren
Robert Zebahl Leipzig (Germany)	120mm (150x)	Clearly split with nearly equally bright components.
Mark McCarthy Fremont (California/USA)	203mm (333x)	Nice near equal, light yellow-white stars, well split. nice pair [BC is A 847 7.67/7.84 0.3" and could have been gotten on a better night!]
Mark McCarthy Fremont (California/USA)	508mm (533x)	Easy and obvious pair, bright 7th mag stars ~3". [This was a first try at the short period list but I missed the object, which is A 847 BC, 7.67/7.84 0.3" -- need to try again.]

STF702

9m6

10m1

8.3''

80°

2017

Ori

05h24m17.61s

+02°22'04.60"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Wide, bluish for faintness, probably not physical [not physical]

ES576

8m1

8m9

42.7''

237°

2015

Aur

05h24m22.85s

+42°36'37.00"

Mark McCarthy

Fremont (California/USA)

317mm (270x)

Pretty finder split. In scope white stars, near equal to 0.5 delta mag.

DA5, eta Ori

3m6

4m9

1.8''

77°

2018

Ori

05h24m28.62s

-02°23'49.70"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Split is 1 disk separation, PA to E-W, and delta mag is 0.5-1.

★

A2703

8m4

9m0

0.2''

90°

1995

Ori

05h24m33.14s

+09°10'15.10"

Mark McCarthy

Fremont (California/USA)

508mm (1067x)

Definite notch at best moments, slight magnitude difference, tough

S479

8m3

8m9

46.4''

220°

2014

Ori

05h24m38.61s

+01°48'38.80"

Rene Merting

Drachhausen (Germany)

18x70

beide Komponenten stehen südwestlich vom hellen 25 Ori wie an einer Kette gezogen - die Trennung der Komponenten dieses Doppelsterns beträgt 1/3 Abstand 25 Ori zu Komponente A

HU1226

9m8

0.7''

55°

2016

Ori

05h25m05.57s

+15°21'44.00"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Suspected at 333x but a bit too fuzzy. Nice very clean split at 533x, slightly orange stars, near equal

STF708

7m7

8m9

2.8''

321°

2017

Ori

05h25m11.28s

+01°55'26.10"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Resolves only with seeing, fuzzy otherwise, about 2 delta mag and ~2"

★

STF698

6m7

8m3

31.3''

348°

2018

Aur

05h25m12.94s

+34°51'18.60"

Robert Zebahl Leipzig (Germany)	102mm (62x)	Beautiful double star, easy to separate and quite striking. Primary component appeared in clear orange, the companion was too faint to identify the color.
Uwe Pilz Leipzig (Germany)	105mm (88x)	rot-orange und blaugrau, lohnend
Robert Zebahl Leipzig (Germany)	152mm (22x)	Easy with a attractive separation and a clear difference in brightness. A: pale yellow; B: creamy white with a touch of blue. At 49x the color impression was a bit more intense. Located in beautiful field of stars.
Mark McCarthy Fremont (California/USA)	317mm (270x)	Orange-yellow A and lilac B, wide, finder split, 1 delta mag. Pretty.

A848

6m9

7m9

0.3''

179°

2016

Ori

05h25m31.08s

-00°32'38.20"

Mark McCarthy

Fremont (California/USA)

203mm (533x)

Suspect elongation at 333x, at 533x I get a snowman, very definite with seeing. White stars, noticeable mag difference

★

STF699

7m9

8m6

8.9''

346°

2018

Aur

05h25m38.50s

+38°02'41.10"

Robert Zebahl Leipzig (Germany)	55mm (25x)	Well separated with slightly fainter companion.
Robert Zebahl Leipzig (Germany)	70mm (22x)	Separated at 22x, but still a relatively tight pair with a moderate difference in brightness. Together with sigma Aur in one field of view. Overall rather dim double star. At 57x very nice view! A: pale orange, B: slightly bluish
Uwe Pilz Leipzig (Germany)	105mm (88x)	schwach, aber lohnend. Orange und blau
Mark McCarthy Fremont (California/USA)	317mm (270x)	Wide yellow and blue-white, half delta mag.

HJ3759

5m9

7m3

26.7''

318°

2018

Lep

05h25m59.82s

-19°41'43.40"

Rene Merting

Drachhausen (Germany)

100mm (32x)

bei 32x zeigt sich ein bequem getrenntes Farbkontrastpärchen - Komponente A wirkt gelblich, die gut 1.5 Magnituden schwächere Komponente B im NW wirkt grauweiß

J589

11m9

12m2

5.0''

193°

2015

Ori

05h26m28.22s

+14°55'45.20"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

I thought this would be harder since they are faint but they're an easy, wide light blue star pair, near equal

STF712

6m7

8m6

3.2''

66°

2017

Ori

05h26m31.22s

+02°56'09.30"

Rene Merting Drachhausen (Germany)	100mm (107x)	bei 107x wird Komponente B ganz knapp getrennt östlich von A sichtbar und bestimmt zwei Größenklassen schwächer - kurios, trotz des großen Helligkeitsunterschiedes strahlt B genauso schön reinweiß wie A
Mark McCarthy Fremont (California/USA)	203mm (333x)	More than 1 delta mag, light off-white A and slightly blue B, wide

BRT1181

11m2

11m3

3.5''

354°

2015

Ori

05h26m47.03s

+14°40'52.30"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Easy pair, light blue stars, half delta mag, wide ~3.5" [not physical]

★

TDS3201

9m5

9m7

0.4''

237°

1991

Ori

05h27m40.03s

+14°08'08.40"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

super fine but split, more than half delta mag, fine focus needed to remove any glare. What a nice pair, ice blue color stars

STF716, 118 Tau

5m8

6m7

4.9''

209°

2019

Tau

05h29m16.49s

+25°09'01.10"

5m8

11m9

140.2''

99°

2001

Robert Zebahl Leipzig (Germany)	70mm (33x)	AB: At 33x very tight with visible difference in brightness. At 47x very nice view. Both components appeared white.
Sarah Gebauer Germany	150mm (26x)	AC: schon bei 26x weit getrennt
Mark McCarthy Fremont (California/USA)	317mm (277x)	AB: Equal white widely separated.

STF721 & GUI7 & BU557 & GMC13

STF721

A-BC

7m1

9m1

25.3''

149°

2014

Ori

05h29m33.52s

+03°08'52.50"

GUI7

7m1

11m2

149.8''

147°

2014

BU557

9m9

0.2''

160°

1997

GMC13

11m2

12m9

11.1''

263°

2015

Rene Merting Drachhausen (Germany)	18x70	STF721 (A-BC): Komponente BC ist ganz schwach südöstlich von A erkennbar - BC ist irgendwie kein richtig klarer Lichtpunkt, aber er ist eben knapp getrennt von A zu erkennen
Rene Merting Drachhausen (Germany)	100mm (20x)	STF721 (A-BC): bei 32x ein schön isoliert stehendes weit getrenntes Doppelsternpärchen - Komponente BC im SO ist mehr als eineinhalb Größenklassen schwächer und strahlt grauweiß - etwas weiter südöstlich ist ein weiterer ganz schwacher Stern in vierfachem Abstand von A-BC erkennbar (separate Bezeichnung GUI7, Komponente D, 11.2 mag) - zurück auf 20x ist STF721 noch gut sichtbar, auf BC muss man sich ein wenig mehr konzentrieren
Rene Merting Drachhausen (Germany)	100mm (32x)	GUI7 (AD): bei 32x etwas weiter südöstlich von A-BC (STF721) ist Komponente D ganz schwach in vierfachem Abstand von A-BC erkennbar

HU217, LY Aur

7m2

8m3

0.7''

254°

2015

Aur

05h29m42.65s

+35°22'30.10"

Frederik Wanink

Itterbeck (Germany)

254mm (640x)

nicht als DS gesehen

STF725, 31 Ori

4m7

9m7

13.0''

88°

2013

Ori

05h29m43.98s

-01°05'31.80"

Rene Merting Drachhausen (Germany)	100mm (64x)	bei 32x ist nur Komponente A goldgelb leuchtend erkennbar, Komponente B wird erst sichtbar bei 64x, der Stern zeigt sich ganz schwach östlich von A, die Trennung ist ordentlich - ohne das Wissen um den Doppelstern hätte ich ihn nie als solchen erkannt
Mark McCarthy Fremont (California/USA)	203mm (333x)	31 Ori Large mag difference but since is wide separation it is easier to see. Bluish B vs bright light orange A
Mark McCarthy Fremont (California/USA)	317mm (553x)	Bright orange and very faint blue B, 3 delta mag, pretty wide.

★

HU1228

9m8

0.3''

16°

2007

Ori

05h29m48.07s

+13°34'57.30"

Mark McCarthy

Fremont (California/USA)

508mm (1067x)

Snowman overlapping disks at best moments, one second out of ten. Slightly orange stars and slight mag difference

★★

STF719

7m5

8m8

1.4''

336°

2016

Aur

05h30m06.14s

+29°32'55.30"

7m5

9m4

15.2''

353°

2016

Robert Zebahl Leipzig (Germany)	70mm (22x)	AC: At 22x clearly visible difference in brightness at moderate separation. The companion appears only as a dim star. At 57x the color contrast is also quite noticeable. A: light orange, C: silvery blue
Robert Zebahl Leipzig (Germany)	102mm (62x)	AC: Easy with a rather dim companion. The color seemed a bit more intense than in the 6-inch refractor. A: lovely pale orange; B: grey-bluish.
Uwe Pilz Leipzig (Germany)	105mm (200x)	AC: der helle Stern ist weiß.
Uwe Pilz Leipzig (Germany)	105mm (288x)	AB waren schwieriger, als es die Daten vermuten ließen. C ist schwach und erforderte indirektes Sehen
Robert Zebahl Leipzig (Germany)	152mm (49x)	AC: Easy to separate with a significant difference in brightness. A appeared in bright orange, B appeared greyish-blue.
Robert Zebahl Leipzig (Germany)	152mm (129x)	AB: At 129x clearly elongated. Difference in brightness visible. The seeing was mediocre (3/5), so that the diffraction disks were only occasionally visible. At 180x no better.
Mark McCarthy Fremont (California/USA)	317mm (277x)	AB: widely separated with an orange A and bluish B

STTA63

6m5

7m7

75.2''

277°

2017

Aur

05h30m45.08s

+39°49'33.30"

Robert Zebahl

Leipzig (Germany)

70mm (22x)

At 22x widely separated, visible difference in brightness. Slight difference in color: white-yellowish (at 44x light orange), slightly orange.

STF728, 32 Ori

4m4

5m8

1.3''

44°

2017

Ori

05h30m47.06s

+05°56'53.30"

Uwe Pilz Leipzig (Germany)	105mm (288x)	sauber getrennt, Beugungsscheiben berühren sich gerade
Mark McCarthy Fremont (California/USA)	203mm (333x)	32 Ori White and off white pair, 1.5 delta mag, ~1.5". Nice and very clean with seeing

STF726

7m9

8m6

1.2''

264°

2016

Ori

05h30m51.75s

+10°15'15.70"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Very nice, unequal, ~1", 1 delta mag, very fine

STF729, 33 Ori

5m7

6m7

1.8''

26°

2017

Ori

05h31m14.53s

+03°17'31.70"

Uwe Pilz

Leipzig (Germany)

105mm (180x)

Begleiter etwas außerhalb des ersten Rings

delta Ori, Mintaka

BU558

2m4

14m2

33.4''

229°

2016

Ori

05h32m00.40s

-00°17'56.70"

STFA14

2m4

6m8

56.2''

4°

2017

Rene Merting Drachhausen (Germany)	10x50	AC: Komponente C zeigt sich gut abgesetzt im NW von A - Helligkeitsunterschied enorm, mindestens 3 Größenklassen
Rene Merting Drachhausen (Germany)	18x70	AC: total leicht - Komponente C thront gut getrennt nördlich über A (Mintaka) und ist gut 2 bis 3 Größenklassen schwächer (sogar 4.42 mag laut Stelle Doppie) und trotzdem noch ein mittelheller Stern - A ist gleißend weiß, C weißgrau
Uwe Pilz Leipzig (Germany)	105mm (200x)	AC: sehr weit in reichem Sternfeld
Uwe Pilz Leipzig (Germany)	105mm (288x)	AC: reinweiß-violett
Mark McCarthy Fremont (California/USA)	317mm (553x)	AC: Bright, 2 delta mag, very wide.

★

STF730

6m1

6m4

9.7''

142°

2018

Tau

05h32m14.14s

+17°03'29.30"

Christopher Hay Seeheim (Germany)	15x45	Momentary split, coming and going, a fascinating sight. Quite white, nice together with Ruby Star 119 Tau in 4.5° FOV, and to southwest the fine star field of Collinder 65
Robert Zebahl Leipzig (Germany)	70mm (22x)	At 22x beautiful sight, easy to separate with little difference in brightness. A appeared slightly yellowish. At 57x moderate, but still very nice color contrast: A yellowish, B rather white.

STF718

7m5

7.7''

73°

2015

Aur

05h32m20.59s

+49°23'36.50"

Robert Zebahl

Leipzig (Germany)

55mm (25x)

Easy to split with similarly bright components. Nive view.

BU1048

5m3

9m8

2.2''

355°

2015

Ori

05h32m41.35s

-01°35'30.60"

Rene Merting

Drachhausen (Germany)

100mm (107x)

bei 107x zeigt sich Komponente B nur in ruhigen Momenten ganz schwach nördlich von A - Komponente A ist schön weiß, B kommt aufgrund des großen nicht abschätzbaren Helligkeitsunterschiedes ohne Farbe aus

STF734

6m7

8m2

1.6''

355°

2017

Ori

05h33m07.35s

-01°43'02.50"

6m7

8m3

29.3''

244°

2014

Rene Merting Drachhausen (Germany)	100mm (20x)	AC: bei 32x sind beide Komponenten weit getrennt voneinander erkennbar - Komponente C im Westen ist gut 1.5 Magnituden schwächer - zurück auf 20x geben die beiden ein schönes schwaches Pärchen ab, Komponente A ist deutlich heller und es zeigt sich ein schöner Farbkontrast zwischen beiden Sternen - der DS selbst ist eher unauffällig im Sternumfeld
Mark McCarthy Fremont (California/USA)	317mm (553x)	AB: Very close pair, delta mag 1, PA to north.

★

STF745

8m2

9m3

28.7''

347°

2014

Ori

05h34m49.12s

-06°00'22.90"

8m2

10m4

97.1''

304°

2014

9m3

10m4

78.4''

290°

2015

Rene Merting

Drachhausen (Germany)

100mm (20x)

AB: bei 32x interessantes Doppelstern-Paar zusammen mit dem dicht stehenden STF747, der knallig hell daher kommt - Komponente A von STF745 ist noch deutlich schwächer, als die B-Komponente von STF747 - zurück auf 20x sind beide Komponenten schwach erkennbar und knapp getrennt
AC: bei 32x ist Komponente C nordwestlich von A in 2,5-facher Entfernung von AB leicht nach Westen abgeknickt zu erkennen

★

STF747

4m7

5m5

36.0''

225°

2018

Ori

05h35m02.68s

-06°00'07.20"

Rene Merting Drachhausen (Germany)	8x30	zwei helle Sterne knapp getrennt, Komponente B im Südwesten nur knapp schwächer
Rene Merting Drachhausen (Germany)	100mm (20x)	bei 32x zeigt sich B südwestlich von A gut eine halbe Größenklasse schwächer - B wirkt ein wenig kühler, bläulicher - zurück auf 20x, weiterhin leichte Trennung und Sichtbarkeit

STF738, lam Ori

3m5

5m5

4.3''

44°

2019

Ori

05h35m08.28s

+09°56'03.00"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Meissa. White pair, 2 delta mag, ~5". Bright clean white [not physical]

DA4, 42 Ori

4m6

7m5

1.2''

202°

2018

Ori

05h35m23.16s

-04°50'18.10"

Uwe Pilz

Leipzig (Germany)

105mm (260x)

Unregelmäßigkeit im ersten Ring, nicht eindeutig

★

STF752, 44 Ori, iota Ori, Nair Al Saif, Hatysa

2m8

7m7

11.4''

142°

2017

Ori

05h35m25.98s

-05°54'35.60"

2m8

9m8

49.4''

103°

2002

7m7

9m8

41.1''

94°

2015

Rene Merting

Drachhausen (Germany)

100mm (32x)

AB: bei 64x tritt Komponente B gut getrennt aus dem Glanz von Komponente A hervor - mindestens 3 Magnituden Helligkeitsunterschied - A leicht gelblich, B braunorange - zurück auf 32x ist B in guten Momenten ganz knapp getrennt von A erkennbar
AC: bei 64x zeigt sich Komponente C südöstlich von A - der Abstand von AC ist gut 4 bis 5x so groß wie Abstand AB - C ist dabei nochmal deutlich schwächer als B - zurück auf 32x ist C auch zu erkennen

STF750

6m4

8m4

4.2''

60°

2018

Ori

05h35m31.07s

-04°21'50.60"

Rene Merting Drachhausen (Germany)	100mm (107x)	bei 107x präsentieren sich beide Komponenten knapp getrennt - B im Osten ist sehr schwach, gut 2 Magnituden schwächer als A
Uwe Pilz Leipzig (Germany)	105mm (192x)	mit 60mm trennbar

XMI9

7m9

9m7

30.1''

60°

2015

Tau

05h35m44.56s

+18°45'29.30"

Rene Merting

Drachhausen (Germany)

18x70

eine echte Herausforderung - Komponente B taucht mit etwas Konzentration ganz schwach östlich von A auf, der Abstand ist ordentlich - B ist schätzungsweise 1.5 bis 2 Größenklassen schwächer - Komponente A strahlt schneeweiß, B wirkt wegen des Helligkeitsunterschiedes grau

STF751

8m0

9m0

15.1''

123°

2015

Ori

05h35m48.03s

-00°59'12.80"

Rene Merting

Drachhausen (Germany)

18x70

mit etwas Geduld ist ein ganz knapp getrenntes schwaches Pärchen erkennbar - Komponente B im SO von A ist vielleicht eine dreiviertel Größenklasse schwächer

★

STF742

7m1

7m5

4.2''

275°

2019

Tau

05h36m26.38s

+21°59'35.10"

Located about 0.5 degree east of Messier 1.

Robert Zebahl Leipzig (Germany)	102mm (62x)	Beautifully separated, relatively tight with well visible difference in brightness. Points directly toward Messier 1 and can be observed with it in one field of view. Very nice!
Robert Zebahl Leipzig (Germany)	120mm (48x)	Nice, evident double near Messier 1. Easy to split with almost equally bright components.
Robert Zebahl Leipzig (Germany)	152mm (69x)	At 49x just so, at 69x easily separable. The fainter component appeared a little warmer in terms of color. Great view together with Messier 1 in the field of view.
Robert Zebahl Leipzig (Germany)	200mm (80x)	Nice double star with nearly equally bright components.

STF754

5m7

9m2

5.3''

288°

2002

Ori

05h36m35.69s

-06°03'53.10"

Rene Merting

Drachhausen (Germany)

100mm (107x)

bei 107x zeigt sich Komponente B als kleine angeklebte Murmel westlich von A - höher vergrößern hat Seeing-technisch in dieser Nacht nichts mehr gebracht

STF736

7m5

8m6

2.7''

0°

2019

Aur

05h37m07.20s

+41°49'41.70"

Robert Zebahl

Leipzig (Germany)

70mm (57x)

At 57x split with almost no space in between. At 100x clearly split with noticeable fainter component.

STF749

6m5

1.1''

319°

2017

Tau

05h37m08.84s

+26°55'28.30"

6m5

10m5

181.6''

299°

2011

Robert Zebahl Leipzig (Germany)	70mm (133x)	AB: I had the impression that in the correct position angle, without knowing that angle during observation, a minimal elongation could be detected. But observation is borderline and too doubtful.
Mark McCarthy Fremont (California/USA)	317mm (277x)	AB: Hair-split, equal brightness white stars. Nice.

★★

STF757

8m0

8m3

1.5''

242°

2018

Ori

05h38m06.52s

-00°11'03.50"

Mark McCarthy Fremont (California/USA)	317mm (553x)	Pretty double-double system. AB is close ~1.5" near equal 8th magnitude stars. A-AC widely separated near equal to the east. AD also to the east about 10" separated from A-AC
Mark McCarthy Fremont (California/USA)	317mm (553x)	Pretty double-double system. AB is close ~1.5" near equal 8th magnitude stars. A-AC widely separated near equal to the east. AD also to the east about 10" separated from A-AC
Mark McCarthy Fremont (California/USA)	317mm (553x)	Pretty double-double system. AB is close ~1.5" near equal 8th magnitude stars. A-AC widely separated near equal to the east. AD also to the east about 10" separated from A-AC

★★

STF761

7m9

8m4

68.1''

202°

2016

Ori

05h38m36.54s

-02°33'12.70"

7m9

8m6

72.1''

209°

2016

7m9

11m8

32.7''

308°

2016

8m4

8m6

8.5''

269°

2015

Rene Merting

Drachhausen (Germany)

100mm (32x)

A-BC: bei 32x stehen südlich von Komponente A in ordentlichem Abstand die Komponenten B (und C)
BC: bei 32x sehe ich zwei dicht zusammen stehende gleich schwache Sterne, knapp getrennt

26 Aur, STF753

AB-C

5m5

8m4

12.0''

269°

2013

Aur

05h38m38.10s

+30°29'32.80"

Robert Zebahl Leipzig (Germany)	70mm (22x)	Separable at 22x, but quite close together and pretty uneven. Primary component appeared in bright orange. At 57x easy to separate. The faint companion appeared silvery-blue.
Uwe Pilz Leipzig (Germany)	105mm (88x)	heller Stern blauweiß
Mark McCarthy Fremont (California/USA)	317mm (277x)	Bright yellow A and a fainter yellow white B.

★★★

sigma Ori, 48 Ori

BU1032

4m1

5m3

0.3''

77°

2015

Ori

05h38m44.77s

-02°36'00.20"

STF762

AB-C

3m8

8m8

11.6''

237°

2016

STF762

AB-D

3m8

6m6

12.9''

84°

2018

STF762

AB-E

3m8

6m3

41.5''

62°

2018

STF762

6m6

8m8

23.7''

253°

2018

STF762

6m3

8m8

52.9''

241°

2018

STF762

6m3

6m6

29.9''

233°

2018

STF3135

AB-F

3m8

7m9

208.0''

324°

2016

Rene Merting Drachhausen (Germany)	100mm (64x)	AB-C: bei 64x zeigt sich Komponente C ganz schwach südwestlich von AB AB-D: bei 32x schließt sich an die zartgelbe Komponente AB unmittelbar im Osten dicht stehend D weißorange an - ein schickes Trio zusammen mit E weiter östlich AB-E: bei 32x zeigt sich in vierfacher Entfernung von AB-D die Komponente E weiter östlich in einer Linie - E ist ähnlich hell wie D
Sarah Gebauer Germany	150mm (125x)	ein sehr schönes Muster des Mehrfachsystems, auch wenn längst nicht alle Komponenten getrennt zu sehen waren, AB-C, AB-D und AB-E getrennt, A und B nicht
Uwe Pilz Leipzig (Germany)	320mm (80x)	AB-C-D schon im Aufsuchokular sichtbar. Sehr lebhafte Farben, einer der schönsten Mehrfachsterne überhaupt. Im selben Feld mit STF791

HDO77

6m9

7m9

10.9''

124°

2017

Lep

05h39m44.71s

-20°26'06.70"

Rene Merting

Drachhausen (Germany)

100mm (32x)

bei 32x ein schickes enges Sternpaar, knapp getrennt - leichter Farbkontrast, Komponente B im SO ist orangebraun, A dagegen ist doppelt so hell und strahlt weiß

STF774, zeta Ori, 50 Ori, Alnitak

1m9

3m7

2.4''

167°

2017

Ori

05h40m45.52s

-01°56'33.30"

1m9

9m6

58.5''

10°

2017

Robert Zebahl Leipzig (Germany)	70mm (128x)	AB: Big difference in brightness. I could see the fainter component near the first ring of the Airy pattern of the brighter component.
Uwe Pilz Leipzig (Germany)	105mm (288x)	AB: sauber getrennt, Beugungsscheiben berühren sich gerade
Mark McCarthy Fremont (California/USA)	203mm (333x)	AB: Alnitak. Easy, 2 delta mag,~2", white
Mark McCarthy Fremont (California/USA)	317mm (207x)	AC: Alnitak:AC is a very faint star widely separated outside of the main star's glare.
Mark McCarthy Fremont (California/USA)	317mm (207x)	AB: about 2" and 1.5 delta mag.

★★★

STF764

6m4

7m1

25.6''

14°

2017

Aur

05h41m20.98s

+29°29'14.70"

Robert Zebahl Leipzig (Germany)	55mm (25x)	Easy to split with large distance and noticeable difference in brightness.
Robert Zebahl Leipzig (Germany)	70mm (22x)	Very easy and bright, pretty wide apart with a small difference in brightness; whitish and slightly yellowish. A nice double star for binoculars.
Uwe Pilz Leipzig (Germany)	105mm (88x)	blauweiß und orange, kleiner aber gut sichtbarer Helligkeitsunterschied. Schon bei 21x sichtbar, sehr lohnend.
Mark McCarthy Fremont (California/USA)	317mm (277x)	two bright whites widely separated

STF778

8m4

10m1

3.5''

186°

2015

Aur

05h44m05.16s

+30°56'01.80"

Mark McCarthy Fremont (California/USA)	317mm (277x)	double squeezed into the FOV with STF 789 at 277x, AB is a widely separated 4 delta mag pair
Mark McCarthy Fremont (California/USA)	317mm (277x)	double squeezed into the FOV with STF 789 at 277x, AC is a widely separated 4 delta mag pair, same brightness as B

H6 40, gam Lep

3m6

6m3

97.4''

350°

2015

Lep

05h44m27.79s

-22°26'54.20"

Rene Merting

Drachhausen (Germany)

100mm (32x)

bei 32x wunderschön - Komponente A strahlt gleißend gelb, Komponente B extrem weit im NNW ist gut 2 Größenklassen schwächer - viele schwächere Sterne im unmittelbaren Umfeld, sie gehören aber nicht mit zum System

STF783

8m1

9m7

8.3''

0°

2015

Aur

05h44m37.74s

+29°00'59.70"

Uwe Pilz

Leipzig (Germany)

105mm (288x)

schwierig, weil schwach. Heller Stern gelblich

../projects/double-stars/uwe-pilz/sketches/200117stf783.jpg

STF789

6m1

10m2

14.0''

150°

2017

Ori

05h45m01.80s

+04°00'29.30"

Mark McCarthy Fremont (California/USA)	203mm (333x)	Wide, 3 delta mag, ~15", B looks blue. [did not notice BC, A 2655, 13.7 mag B 1.1"]
Mark McCarthy Fremont (California/USA)	317mm (277x)	Widely separated 4 delta mag pair, in same FOV as STF 778

BU560

7m8

8m2

1.7''

124°

2019

Aur

05h47m24.87s

+29°39'26.90"

Robert Zebahl Leipzig (Germany)	70mm (100x)	Clearly visible as a double star with overlapping diffraction disks (figure '8') and small difference in brightness.
Robert Zebahl Leipzig (Germany)	152mm (129x)	Separated with very little difference in brightness, relatively tight. Overall easy.

STT119

8m1

8m9

0.7''

355°

2009

Ori

05h47m54.88s

+07°57'37.50"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Suspect elongations with 8" 533x & 20" 533x, but image not good enough. But I got a nice clean split with apodizing mask, nearly perfrect disks. Orange stars well split, <1", about 1 delta mag

STF795, 52 Ori

6m0

1.0''

220°

2017

Ori

05h48m00.21s

+06°27'14.50"

Sarah Gebauer Germany	150mm (125x)	bei 125x und 250x nicht getrennt im April 2020
Mark McCarthy Fremont (California/USA)	317mm (553x)	Bright white, near equal magnitude, near touching disks hairline split
Mark McCarthy Fremont (California/USA)	508mm (533x)	52 Ori. Close but well split, near equal, ivory white. with apodising mask

STF798

7m3

9m5

21.2''

182°

2017

Ori

05h48m10.42s

-08°23'01.10"

Rene Merting

Drachhausen (Germany)

100mm (32x)

bei 32x muss ich schon sehr genau hinschauen, dann erkenne ich B südlich von A, ordentlich getrennt - die B-Komponente ist gut 2 Magnituden schwächer - A warmweiß, B dagegen kupferbraun

★★

STT117

7m1

10m0

11.7''

31°

2015

Aur

05h48m11.46s

+30°32'06.70"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

bright yellow A and a small faint B. Carbon star to the west in FOV. Lovely, colorful field.

STF797

7m4

9m8

7.3''

17°

2015

Ori

05h48m28.21s

+04°42'14.00"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

Yellow and red, 2 delta mag, PA to north.

STF3115

6m5

7m5

0.9''

337°

2017

Cam

05h49m04.64s

+62°48'29.60"

Frederik Wanink

Itterbeck (Germany)

254mm (640x)

gerade eben trennbar mit schwarzem Zwischenraum

../projects/double-stars/frederik-wanink/sketches/STF3115.jpg

STF796

7m2

8m2

3.7''

62°

2019

Aur

05h49m55.53s

+31°47'08.70"

Robert Zebahl Leipzig (Germany)	55mm (83x)	Well split with noticeable fainter companion.
Mark McCarthy Fremont (California/USA)	317mm (277x)	Pretty yellow and faint blue

★★

STF791

9m1

10m0

5.0''

91°

2019

Aur

05h50m03.41s

+39°34'34.70"

9m1

11m2

60.7''

214°

2015

Uwe Pilz

Leipzig (Germany)

320mm (80x)

A und B sind deutlich orange. Im selben Feld wie Sigma Orionis

../projects/double-stars/uwe-pilz/sketches/200212sigmaOri.jpg

H5 90, nu Aur

4m0

11m4

55.9''

206°

2012

Aur

05h51m29.39s

+39°08'54.50"

Mark McCarthy

Fremont (California/USA)

317mm (270x)

Bright orange with a much fainter wide split.

★

STF805

8m4

8m9

12.1''

50°

2015

Tau

05h51m48.20s

+28°26'59.60"

Rene Merting Drachhausen (Germany)	100mm (32x)	bei 32x ein schwaches Paar - Komponente B zeigt sich knapp abgesetzt im NO von A und ist eine halbe Größenklasse schwächer - unauffällig trotz scheinbarer Sternarmut im Umfeld
Uwe Pilz Leipzig (Germany)	105mm (88x)	schwach, aber lohnend, gelb und blaugrau

STF799

7m3

8m3

0.8''

158°

2013

Aur

05h52m13.88s

+38°33'36.40"

Frederik Wanink Itterbeck (Germany)	254mm (640x)	sehr schwierig, eher geraten
Mark McCarthy Fremont (California/USA)	317mm (270x)	Hairline split but definite in the best moments, white, half delta mag.

★★

BU1053

6m9

8m8

1.9''

0°

2019

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.

STT123

7m3

9m1

2.1''

187°

2012

Ori

05h54m09.53s

+10°14'39.40"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Orange A and blue B, ~2.5", 2 delta mag

STF816

6m9

9m3

4.1''

290°

2014

Ori

05h54m55.46s

+05°51'38.80"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

White and orange, 3 delta mag, PA WNW.

A2658

10m2

10m3

0.4''

73°

1995

Ori

05h55m00.02s

+06°13'21.50"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Hairline split, near equal pair, faint. With apodizing mask

STF818

9m8

10m1

5.9''

277°

2014

Ori

05h55m19.45s

+04°42'49.80"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Fairly faint, wide, slightly blue, a small mag delta

MIL2

7m1

14m5

11.8''

232°

2015

Aur

05h55m22.26s

+29°57'50.20"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

A white A and slightly ruddy B, easy.

STF820

9m1

9m8

5.1''

110°

2019

Ori

05h55m42.95s

+08°58'57.90"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Pretty orange A and light orange B, wide, about 2 delta mag

ARG63

8m7

9m1

32.5''

67°

2014

Ori

05h57m08.58s

+10°13'45.70"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Wide, half delta mag. unremarkable [however it is a physical pair 432 LY away. A is a 0.5" pair with 12th mag B, worth a try on Challenger.]

BU1189

AB-C

8m0

8m3

56.1''

194°

2015

Ori

05h57m27.59s

+00°23'58.50"

Rene Merting

Drachhausen (Germany)

18x70

auffällig, zwei mittelhelle Sterne, die weit auseinander stehen - Komponente B im Süden ist knapp eine halbe Größenklasse schwächer

STT124

6m1

7m4

0.6''

299°

2018

Ori

05h58m53.23s

+12°48'29.80"

Mark McCarthy Fremont (California/USA)	317mm (170x)	Seeing not good. Bloated yellow star with bluish B just attached to the edge, like a wart. B is very faint, small.
Mark McCarthy Fremont (California/USA)	317mm (553x)	Briefly split in the best moments, 1 second out of 10. A star yellow-white and small, hard blue B.

STT126

8m0

10m7

10.7''

61°

2017

Ori

05h59m24.50s

+17°48'53.10"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Wide, three delta mag, yellow-white A and faint white B star

★

STT125

7m9

8m9

1.4''

0°

2015

Ori

05h59m42.46s

+22°28'15.00"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Yes, I have the split! White stars, a half delta mag, close but very clean separation. Nice

STT545, 37 Aur, theta Aur

2m6

7m2

4.1''

303°

2018

Aur

05h59m43.24s

+37°12'45.90"

Robert Zebahl Leipzig (Germany)	70mm (57x)	At 57x nothing seen at first sight. At 133x the much fainter component was visible after a short time as a tiny star in the correct position angle. With this knowledge, the observation at 57x was also successful, even if one has to look very closely. The challenge here is not so much the angular distance as the large difference in brightness.
Uwe Pilz Leipzig (Germany)	105mm (200x)	blauweiß. Wegen der etwas unruhigen Luft und des Helligkeitsunterschiedes nicht einfach.

SIN128

7m3

7m6

2.6''

193°

1985

Aur

06h01m14.73s

+31°32'28.10"

Robert Zebahl

Leipzig (Germany)

70mm (133x)

Even at high magnification there are no indications of a double star. Also the brightness seemed to be less than stated!?

BU16, 3 Mon

5m0

8m0

1.9''

355°

1996

Mon

06h01m50.42s

-10°35'52.60"

Uwe Pilz Leipzig (Germany)	105mm (260x)	schwache Aufhellung im ersten Ring
Uwe Pilz Leipzig (Germany)	105mm (288x)	Begleiter schwach

HDS824

8m2

9m2

2.3''

149°

2019

Ori

06h03m48.13s

+18°15'53.30"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Fine pair, yellow-orange A and white-yellow B, two delta mag

J310

9m8

10m0

2.4''

319°

2015

Ori

06h03m54.49s

+10°14'50.90"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Beautiful matched orange pair, nicely split, very delicate. [surprisingly not a physical pair]

J335

8m4

9m5

1.3''

271°

2015

Ori

06h04m08.29s

+11°00'57.00"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

White A, B resolves with seeing, hairline split and two delta mag. Tough at this aperture

HO228

7m7

10m2

2.4''

267°

2000

Ori

06h06m00.88s

+12°28'45.60"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Very fine indeed. A white and bright in comparison to B which is in A's glow but faint, resolved, ~2" and two delta mag

STF840

A-BC

7m2

8m9

21.5''

248°

2014

Ori

06h06m28.04s

+10°45'01.00"

9m8

10m1

0.4''

126°

1997

Mark McCarthy Fremont (California/USA)	203mm (205x)	A-BC: White A and slightly blue B, wide, two delta mag. [Did not see BC, 0.4" near equal]
Mark McCarthy Fremont (California/USA)	317mm (170x)	A-BC: Wide blue-white and slightly red pair, 1 delta mag.
Mark McCarthy Fremont (California/USA)	317mm (553x)	BC: B maybe elongated? Not certain.

STT131

7m0

9m4

1.5''

277°

2012

Aur

06h07m25.84s

+36°16'28.70"

Mark McCarthy

Fremont (California/USA)

317mm (270x)

Very close, need seeing to resolve 2 delta mag white A and light blue B

STF851

8m9

9m5

2.6''

33°

2018

Ori

06h08m04.43s

+03°17'23.70"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Fine white nearly matched pair of white stars, very nice

STT132

7m2

9m6

1.8''

332°

2012

Aur

06h08m11.68s

+37°58'57.90"

Mark McCarthy

Fremont (California/USA)

317mm (270x)

White A and slightly red B. Fine pair. 2 delta mag.

STF844

8m5

9m3

23.4''

10°

2017

Ori

06h08m18.38s

+13°59'50.30"

Rene Merting

Drachhausen (Germany)

18x70

AB: Komponente B steht unmittelbar nordwestlich von A und ist deutlich schwächer
AC: Komponente C ist schwächer als B und steht im SO von A, alle drei Sterne bilden eine Linie

BU17

6m9

9m3

3.6''

192°

2019

Mon

06h08m25.39s

-11°08'46.60"

6m9

10m8

10.2''

260°

2015

9m3

10m8

9.3''

276°

1998

Uwe Pilz

Leipzig (Germany)

105mm (288x)

Dreifachstern! (Burnham 17)

../projects/double-stars/uwe-pilz/sketches/bu17.jpg

★

STF848

7m3

8m2

2.6''

110°

2019

Ori

06h08m30.36s

+13°58'15.80"

Rene Merting Drachhausen (Germany)	18x70	AD: Komponente D ist mit etwas Abstand östlich von Komponente A zu erkennen AE: Komponente E ist schwächer als D und steht südöstlich von A in doppeltem Abstand wie AD DH: Komponente H ist noch schwächer als D und steht östlich in dreifachem Abstand wie AD
Robert Zebahl Leipzig (Germany)	70mm (100x)	Well split with obvious difference in brightness.
Christopher Hay Seeheim (Germany)	125mm (100x)	When idly viewing NGC 2169, the “37 Cluster” or “IC37”, I noticed that the brightest star in the 37, namely the one at the NW corner of the 3, is a nicely split double with a thin slice of darkness between the components. PA matches the top bar of the figure-3 well. Stelledoppie lists components of STF848 from A to K, but notes that all are either not physical or uncertain. To my eye only the A-B pair appears double-like.
Mark McCarthy Fremont (California/USA)	203mm (205x)	The "37" cluster. This pair is the star at the tip of the upper part of the three where it turns down to the center. Fine white pair, close but nicely split, two delta mag, busy field
Mark McCarthy Fremont (California/USA)	317mm (170x)	Close bluish pair near the center of the open cluster NGC 2169

STF854

8m8

9m8

5.7''

321°

2019

Ori

06h08m32.08s

+05°48'01.20"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

White stars, one delta mag, wide. In a pretty winter Milky Way field

STF849

9m2

9m5

0.9''

241°

2015

Ori

06h08m44.48s

+17°24'07.00"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Snow man at this aperture and mag, near equal

STT134

7m5

9m1

31.0''

189°

2015

Gem

06h09m15.94s

+24°25'40.30"

Rene Merting

Drachhausen (Germany)

100mm (32x)

bei 32x zeigt sich südlich von A ein gut 1.5 Magnituden schwächerer Begleiter - ein ordentlich getrenntes Pärchen - im Umfeld nicht sehr auffällig (logisch bei einem Doppelstern in M 35)

COU1101

10m8

0.9''

167°

2015

Gem

06h09m35.99s

+26°29'49.10"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Just split, white, half delta mag, in a nice field near some open clusters

STF869

8m2

9m1

24.5''

280°

2017

Mon

06h10m44.34s

-09°51'08.30"

Rene Merting

Drachhausen (Germany)

100mm (32x)

bei 32x gut getrennt - Komponente B im Westen ist halb so hell wie A - dadurch leichter Farbkontrast, A weiß, B grauweiß - der Doppelstern ist auffallend, weil im Umfeld nicht viel los ist

STF860

8m6

9m8

5.9''

358°

2018

Gem

06h11m04.87s

+24°52'56.30"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Blue-white A and slightly red B, wide, ~2 delta, nice

STF845, 41 Aur

6m2

6m9

7.6''

357°

2018

Aur

06h11m36.59s

+48°42'39.60"

Robert Zebahl

Leipzig (Germany)

55mm (25x)

Relatively tight with visible difference in brightness.

J2016, xi Ori

4m4

13m0

37.8''

187°

2008

Ori

06h11m56.40s

+14°12'31.60"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Xi Ori. There are a few faint stars around the bright white A star, but certainly the closest is the B. Surprised I can see it given A's glare. [5 star system all faint & wide]

AG107

9m6

9m8

1.5''

179°

2019

Gem

06h12m49.60s

+24°25'36.20"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Very nice white pair, near equal, ~1.5" nicely split

HO22

8m5

8m6

1.0''

209°

2012

Ori

06h13m27.53s

+10°14'52.40"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Very fine hairline split, near equal. Nice!

STF877

7m5

8m0

5.7''

263°

2019

Ori

06h14m42.67s

+14°35'10.80"

Robert Zebahl Leipzig (Germany)	70mm (44x)	Well split, but close together. Little difference in brightness noticeable.
Mark McCarthy Fremont (California/USA)	203mm (205x)	Near equal white, wide

BU1008, eta Gem, 7 Gem, Propus

3m5

6m2

1.8''

258°

2017

Gem

06h14m52.69s

+22°30'24.60"

Uwe Pilz Leipzig (Germany)	105mm (260x)	Aufhellung im ersten Ring
Uwe Pilz Leipzig (Germany)	105mm (288x)	sehr schwierig
Robert Zebahl Leipzig (Germany)	152mm (225x)	Already comparatively easy at 180x. The faint companion can be seen well as a quite distinct, slightly elongated, partly round brightening. At 225x and above it becomes easy and immediately apparent, even if the diffraction rings of the primary component are not permanently visible due to the seeing. The primary component was shining in a bright orange.
Mark McCarthy Fremont (California/USA)	203mm (333x)	Propus. Yellow A and blue-yellow B, 2 delta mag, 1.5" very nice

A2446

9m0

11m5

2.9''

103°

2007

Ori

06h15m29.11s

+19°31'22.10"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Can just keep faint B star with direct vision. It's quite faint, well away from A

STF880

8m4

8m7

5.6''

55°

2019

Ori

06h15m29.13s

+10°34'42.40"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Nice near equal orange-white, well split

STF872

6m9

7m4

11.3''

215°

2017

Aur

06h15m39.06s

+36°08'55.30"

Robert Zebahl

Leipzig (Germany)

55mm (25x)

Well separated with significant difference in brightness.

J686

10m5

10m7

2.3''

49°

2015

Gem

06h17m26.20s

+22°25'37.00"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Very fine pair, near equal to half delta mag white stars, nicely separated but pleasingly close pair

H5 55

7m0

10m8

62.1''

59°

2015

Gem

06h19m22.52s

+23°16'28.20"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

12 Geminorum: Very wide separation, ~3 delta mag, fairly faint.

AG109

9m4

9m7

2.4''

16°

2019

Gem

06h19m44.83s

+21°28'27.70"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Very nice, half delta mag, nicely split white stars. Very good

★

AG323

9m0

10m2

1.8''

49°

2015

Gem

06h19m45.23s

+22°06'38.80"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Wow! pops with seeing, 1 delta mag, ~2". Very nice. Two other stars much fainter on the outer reaches likely part of system [these are AC and AD]

HU452

9m5

10m8

2.6''

343°

2001

Gem

06h19m46.83s

+22°18'16.60"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Light yellow orange and light blue stars, more than half delta mag, pretty wide [not physical]

STF889

7m6

9m9

21.3''

244°

2015

Gem

06h19m51.77s

+25°00'49.10"

Rene Merting Drachhausen (Germany)	18x70	mit etwas Konzentration sind beide Sterne getrennt zu erkennen - A und B sind halb so weit voneinander entfernt wie das nahe liegende Pärchen STTA74 - Komponente B im SW ist genauso schwach wie B bei STTA74, aber dadurch, dass er näher zum Hauptstern steht, ist er schwächer sichtbar
Rene Merting Drachhausen (Germany)	100mm (32x)	bei 32x unscheinbarer als der 14' nordöstlich liegende STTA74 - die Komponenten von STF889 wirken beide schwächer als die von STTA74 - Komponente B im SW ist gerade so erkennbar, Helligkeitsunterschied mindestens 2 Größenklassen, B ist gut abgesetzt von A - Farbkontrast gelblich, B farblos

TDS3753

11m2

11m4

0.9''

78°

1991

Gem

06h20m30.31s

+25°05'21.40"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Quite faint B star, very tough, ~1" and 1 delta mag

STTA75

7m7

8m9

47.1''

129°

2015

Ori

06h20m34.48s

+18°02'56.70"

Rene Merting

Drachhausen (Germany)

18x70

ein mit ordentlichem Abstand getrenntes Sternpaar - B im SO ist halb so hell wie A

STTA74

7m1

8m9

57.4''

265°

2015

Gem

06h20m36.35s

+25°11'20.40"

Rene Merting Drachhausen (Germany)	18x70	westlich von Komponente A blinkt in ziemlich weitem Abstand die viel schwächere Komponente B hervor - A ist reinweiß, B wirkt grau
Rene Merting Drachhausen (Germany)	100mm (32x)	bei 32x weit getrennt - Komponente B im SW ist 1.5 Magnituden schwächer und wirkt farblos gegen die weiß strahlende Komponente A

S513

7m3

8m9

59.4''

258°

2014

Gem

06h21m14.48s

+21°07'56.70"

Rene Merting Drachhausen (Germany)	18x70	weit getrenntes Pärchen - Komponente B im Westen ist gut 1.5 Größenklassen schwächer und wirkt dadurch bräunlich ggü. der weiß schimmernden Komponente A
Rene Merting Drachhausen (Germany)	100mm (20x)	bei 32x popeleinfach, weit getrennt - Komponente B im Westen ist gut 1.5 Magnituden schwächer - zurück auf 20x nach wie vor sehr einfach, ein unauffälliger Doppelstern

STF3116, FR CMa

5m5

9m7

3.9''

23°

2003

Mon

06h21m24.71s

-11°46'23.60"

Uwe Pilz Leipzig (Germany)	105mm (130x)	schwach, knapp außerhalb des ersten Rings, kein Problem
Uwe Pilz Leipzig (Germany)	105mm (137x)	einfach
Uwe Pilz Leipzig (Germany)	105mm (198x)	oberhalb ß Cma

STF898

9m0

9m6

6.2''

122°

2018

Ori

06h21m57.42s

+10°58'16.50"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Equal pair, wide, may be part of triple, in nebulosity? [Is part of a triple, WAL 44 is AC, 9.00/11.28 26.5"]

STF881, 4 Lyn

6m1

7m7

0.6''

149°

2016

Lyn

06h22m03.57s

+59°22'19.50"

Frederik Wanink

Itterbeck (Germany)

254mm (640x)

schwierig wegen Helligkeitsunterschied

STF899

7m4

8m0

2.2''

17°

2019

Gem

06h22m49.64s

+17°34'27.30"

Robert Zebahl Leipzig (Germany)	70mm (133x)	Separated, but tight with visible difference in brightness.
Mark McCarthy Fremont (California/USA)	203mm (333x)	Near equal, rather wide, one a little yellow the other light blue-white

OL67

10m9

11m9

5.2''

39°

2015

Gem

06h23m00.44s

+22°13'12.80"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Averted vision only, wide, pops with seeing, just able to see it

★

STF900, epsilon Mon, 8 Mon

4m4

6m6

12.0''

29°

2017

Mon

06h23m46.10s

+04°35'34.20"

Robert Zebahl Leipzig (Germany)	55mm (42x)	Relatively large distance and clear difference in brightness. The lighter component seemed white-yellowish, the weaker one slightly greenish-blue. The color contrast, however, was not particularly conspicuous.
Uwe Pilz Leipzig (Germany)	105mm (288x)	Blau-rot

STT140

6m9

10m1

3.0''

119°

2012

Gem

06h26m37.73s

+15°31'25.30"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Nice 3 delta mag pair, wide, clean with seeing, bluish stars

STF914

6m3

9m2

21.0''

298°

2017

Mon

06h26m44.85s

-07°30'43.00"

Rene Merting Drachhausen (Germany)	18x70	ein ordentlich getrenntes Pärchen, wobei die Komponente B westnordwestlich von A nur knapp sichtbar ist - Helligkeitsunterschied mindestens 3, wenn nicht sogar 4 Größenklassen
Rene Merting Drachhausen (Germany)	100mm (20x)	bei 32x kommen beide Sterne wie großer und kleiner Bruder daher - Komponente B im steht NW in guter Entfernung zu A - Komponente A ist strahlend weiß, B wirkt aufgrund des Helligkeitsunterschiedes farblos - zurück auf 20x ist B auch noch knapp zu erkennen und immernoch ordentlich getrennt von A

AG112

9m8

9m9

2.8''

209°

2019

Gem

06h27m30.03s

+24°32'00.80"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Very pretty equal white, wide ~4". [not physical :-( ]

BRT2351

10m3

10m9

4.4''

39°

2010

Gem

06h27m36.35s

+21°53'38.80"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

White, half delta mag, wide ~5", makes a wide equilateral triangle with two other stars. [not physical]

SHJ70

6m7

8m2

25.0''

202°

2017

Gem

06h27m46.58s

+20°47'22.60"

Rene Merting Drachhausen (Germany)	18x70	ein schönes enges Sternpaar, Komponente B ist SW ist ordentlich getrennt von A zu erkennen - etwas über eine Größenklasse Helligkeitsunterschied, dadurch leichter Farbkontrast
Mark McCarthy Fremont (California/USA)	317mm (553x)	Very pretty orange A, with a brown B, ~1.5 delta mag.

J1092

11m6

12m5

6.8''

226°

2016

Gem

06h27m51.15s

+22°51'06.20"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

A bit faint, bluish, wide ~5", half delta mag

★★★

beta Mon, 11 Mon

STF919

4m6

5m0

7.1''

133°

2017

Mon

06h28m49.07s

-07°01'59.00"

STF919

4m6

5m4

9.8''

125°

2018

STF919

5m0

5m3

2.6''

108°

2018

BU570

4m6

12m1

26.5''

56°

2014

Rene Merting Drachhausen (Germany)	18x70	das Mehrfachsystem ist als 8 erkennbar, eine extrem knappe Berührung, wobei die Komponenten B und C im SO nur als ein Stern gesehen werden können - BC ist gleich hell wie A allein
Rene Merting Drachhausen (Germany)	100mm (32x)	A-BC: bei 32x ein wunderschöner eng stehender Doppelstern - die bei dieser Vergrößerung noch nicht trennbare Komponenten B und C im SO wirken leicht gelblich und ist leicht heller als A - die Komponenten A und BC wollen sich berühren, schaffen es aber nicht ;-) BC: bei 64x wirkt BC leicht länglich wie ein Stäbchen - bei 107x dann der Aha-Effekt, es sind zwei Sterne, knapp getrennt und mit gleichem Positionswinkel wie A-BC - beide Komponenten B und C sind gleich hell und einzeln jeweils etwa eine halbe Größenklasse schwächer als A im NW
Uwe Pilz Leipzig (Germany)	105mm (137x)	Dreifachsystem, drei fast gleichhelle Sterne. Alle blau-weiß

STT141

7m7

9m8

2.3''

144°

2013

Gem

06h30m01.34s

+17°54'23.80"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Beautiful blue-white A star and 2 delta mag B, nice split, ~2.5"

WEI12

8m6

8m7

8.6''

66°

2015

Gem

06h31m08.66s

+21°43'06.00"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Near equal white, wide, unremarkable

STT143 & FOX147

STT143

6m2

10m1

7.9''

103°

2015

Gem

06h31m09.99s

+16°56'19.00"

FOX147

6m2

11m4

47.3''

346°

2015

Mark McCarthy Fremont (California/USA)	203mm (333x)	STT143 (AB): Very pretty yellow-white A star with blue-white B, 3 delta mag., well split
Mark McCarthy Fremont (California/USA)	317mm (553x)	STT143 (AB): Orange A, very faint B, ~3", PA due east. 3rd to the north is FOX 147
Mark McCarthy Fremont (California/USA)	317mm (553x)	FOX147 (AC): 3rd star in STT 143, to the north, faint and widely separated

★

FAB5 & STF926

FAB5

Aa-Ab

7m2

9m6

0.9''

18°

1991

Mon

06h31m40.54s

+05°46'08.80"

STF926

7m2

8m6

10.8''

287°

2017

Mark McCarthy Fremont (California/USA)	317mm (170x)	STF926 (AB): In a triangle of stars which points toward the Rosette Nebula. Blue-white A star and slightly red B, 1 delta mag, wide. The A star is FAB 5
Mark McCarthy Fremont (California/USA)	317mm (553x)	FAB5 (Aa-Ab): Misshapen disk at best moments, very difficult

TDS254

10m6

0.8''

287°

2016

Gem

06h31m46.04s

+21°24'25.60"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Just split, noticeable delta mag, yellow-white A star

★★

STF924, 20 Gem

6m3

6m9

20.7''

212°

2017

Gem

06h32m18.52s

+17°47'03.40"

6m9

13m0

47.8''

144°

2014

Rene Merting Drachhausen (Germany)	18x70	AB: das dicht stehende Paar fällt sofort ins Auge - Komponente A im Norden ist vielleicht eine halbe Magnitude heller als Komponente B, die leicht gräulich strahlt
Robert Zebahl Leipzig (Germany)	70mm (22x)	AB: At 22x bright, immediately conspicuous, although in a relatively star-rich surrounding. Moderate but beautiful color contrast: bright orange, decent blue. Also at 44x very beautiful sight.
Robert Zebahl Leipzig (Germany)	152mm (69x)	AB: Easy, bright, moderately uneven. Nice contrast in color: slight orange, white-bluish.

STT145

7m3

9m9

1.5''

338°

1991

Gem

06h32m20.69s

+15°42'22.30"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Bright yellow-white B and very much fainter B, just outside of A's glare, ~1.5", 3 delta mag

J1956

9m5

9m9

9.8''

60°

2015

Gem

06h33m02.93s

+17°05'11.70"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Faint but wide pair, blue color due to faintness, one more visible than other. Seems in a string of three [not physical]

STF918

7m3

8m2

4.9''

336°

2019

Aur

06h33m57.62s

+52°27'41.80"

Robert Zebahl

Leipzig (Germany)

55mm (40x)

At 40x tight, at 55x well split with obviously fainter companion.

S524

7m2

7m4

53.0''

244°

2017

Gem

06h34m07.10s

+22°07'27.20"

Rene Merting Drachhausen (Germany)	18x70	AB: popeleinfach mit dem FG - ein mehr als gut getrenntes Pärchen zweier gleich heller Sterne - die östliche Komponente wirkt ein klein wenig heller - A warmweiß, B blauweiß
Rene Merting Drachhausen (Germany)	100mm (20x)	AB: bei 32x zeigen sich zwei annähernd gleichhelle Sterne weit getrennt voneinander - Komponente B im SW wirkt kühler als A AC: bei 32x ist südöstlich von A in doppeltem Abstand wie AB eine weitere Komponente erkennbar - C ist mindestens 2 Größenklassen schwächer als B - alle drei Sterne bilden ein schönes rechtwinkliges Dreieck, wobei die Ecke von A den rechten Winkel bildet - zurück auf 20x ist C auch noch knapp sichtbar

★★

STT147

6m8

8m7

42.7''

74°

2016

Aur

06h34m19.37s

+38°04'33.60"

A-CD

6m8

9m8

44.5''

119°

2016

10m6

11m0

0.5''

109°

1957

Uwe Pilz Leipzig (Germany)	105mm (200x)
Robert Zebahl Leipzig (Germany)	152mm (69x)	At 22x, the components A, B and CD are immediately conspicuous, where A dominates. They form a beautiful, acute-angled triangle. At 69x, color differences are also visible. A: subtle orange; B: grey-bluish; CD: tendency to orange. Rewarding, because the double stars STF 928 & STF 929 as well as the very conspicuous carbon star UU Aur are in close proximity and can partly be observed together in one field of view!

STF932

8m3

8m5

1.6''

305°

2017

Gem

06h34m21.57s

+14°45'08.30"

Robert Zebahl Leipzig (Germany)	70mm (150x)	Unfortunately a nearby lamp bothered me. I could see the double star at least elongated.
Mark McCarthy Fremont (California/USA)	203mm (333x)	Very neat near equal white stars, well split

★★

STF928

7m9

8m6

3.4''

131°

2019

Aur

06h34m41.81s

+38°32'24.50"

7m9

12m4

130.9''

124°

2002

8m6

12m4

127.3''

124°

2015

Robert Zebahl Leipzig (Germany)	102mm (62x)	AB: At 28x the double star already appeared elongated, at 62x beautifully separated, with component A shining in a warm, decent orange. At 125x A appeared orange, B grey-bluish.
Uwe Pilz Leipzig (Germany)	105mm (200x)	AB: kühl-weiß und lila
Robert Zebahl Leipzig (Germany)	152mm (69x)	AB: Clearly separated, but tight. Moderate difference in brightness. Nice view with the nearby double stars STT147 & STF 929 and the carbon star UU Aur!

STF938, 14 Mon

6m5

10m6

11.0''

211°

2012

Mon

06h34m46.33s

+07°34'21.00"

Mark McCarthy

Fremont (California/USA)

317mm (170x)

Bright A and very faint 4 delta mag B

★

STF929

7m3

8m4

6.5''

24°

2016

Aur

06h35m22.03s

+37°42'55.10"

Robert Zebahl

Leipzig (Germany)

152mm (69x)

Easy to separate, clear difference in brightness, slight color contrast. Primary component showed a slight orange color, the color of the companion was not clearly defineable. Nice view with the nearby double stars STT147 & STF 928 and the carbon star UU Aur!

S529

6m9

9m3

53.0''

131°

2015

Gem

06h37m33.90s

+12°10'50.00"

Rene Merting

Drachhausen (Germany)

18x70

ein weit getrenntes Sternpaar - Komponente B im SO ist kupferbraun, die gut 2 bis 2.5 Größenklassen hellere Komponente A strahlt weiß

STF942

10m1

3.5''

246°

2015

Gem

06h37m40.87s

+23°38'54.20"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Faint near equal brightness, well split

A2452

9m3

9m6

0.9''

89°

2015

Gem

06h38m07.10s

+19°52'38.70"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Fine near equal pair, well split but close

★

STF941

7m2

8m2

2.0''

83°

2019

Aur

06h38m40.76s

+41°34'53.40"

7m2

10m5

83.9''

135°

2015

Robert Zebahl Leipzig (Germany)	102mm (28x)	AC: Distant, faint companion that is less attracting attention. Used magnifications between 28x and 125x.
Robert Zebahl Leipzig (Germany)	102mm (86x)	AB: At 62x only visible as figure '8'. The difference in brightness is hardly noticeable. At 86x barely separated, obvious. Clearly separated at 125x, but still tight with a moderate brightness difference.

STT152, 54 Aur

6m2

7m8

0.8''

34°

2016

Aur

06h39m33.12s

+28°15'47.40"

Frederik Wanink

Itterbeck (Germany)

254mm (640x)

schwierig, Luftunruhe

../projects/double-stars/frederik-wanink/sketches/STT152.jpg

J353

9m4

10m3

4.1''

65°

2015

Gem

06h39m57.85s

+16°21'39.20"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

White A and slightly red B, wide ~5", 2 delta mag

BRT1208

7m9

10m5

5.1''

175°

2015

Gem

06h40m35.04s

+17°38'26.50"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Easy wide pair, white A and a little red B, ~2 delta mag

STF950, S Mon

4m7

7m8

3.0''

214°

2018

Mon

06h40m58.66s

+09°53'44.70"

Mark McCarthy

Fremont (California/USA)

317mm (170x)

This is the brightest star, forming the trunk, of the Christmas Tree cluster, NGC 2264. Bright white and wide 4 delta mag B star, well separated. Spent some time at 71x to look at the cluster as a whole.

KU27

10m1

10m4

6.9''

187°

2015

Gem

06h42m11.50s

+14°51'29.50"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Easy equal white, wide, in a rich field

STF956

8m0

8m9

36.3''

158°

2015

Mon

06h42m40.55s

+01°42'58.20"

Rene Merting

Drachhausen (Germany)

18x70

leicht - Komponente C zeigt sich gut getrennt im Südwesten von A und ist mehr als eine Größenklasse schwächer

AG119

8m9

9m1

1.5''

83°

2015

Gem

06h44m37.54s

+23°26'48.90"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Fine near equal white, nicely split ~1.5". There's another pair on the edge of the field, wider and brighter

★★

STF946

7m3

9m1

4.0''

129°

2019

Lyn

06h44m51.62s

+59°26'57.40"

Robert Zebahl Leipzig (Germany)	102mm (86x)	Easy to split with noticeable difference in brightness. Very nice view together with the triple system STF 948 in one field of view!
Uwe Pilz Leipzig (Germany)	105mm (88x)	im selben Feld mit 12 Lyn
Robert Zebahl Leipzig (Germany)	152mm (100x)	At 100x and 129x easy to separate, quite uneven. Primary component appeared yellowish, the fainter one rather greyish. Fantastic view together with 12 Lyn (STF 948) in one field of view!

★

AGC1, 9 CMa, alpha CMa, Sirius

-1m5

8m4

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.

STF957

7m5

9m4

3.8''

90°

2019

Gem

06h45m10.02s

+30°49'33.50"

7m5

13m8

19.3''

100°

2015

Robert Zebahl Leipzig (Germany)	70mm (100x)	AB: Too faint for a separation. Primary component visible, companion not. Used magnifications from 67x to 133x. Observation from city at moon (83%).
Robert Zebahl Leipzig (Germany)	152mm (129x)	AB: Easy with significant difference in brightness and moderate angular distance.

POU1983

11m3

11m6

2.9''

315°

2015

Gem

06h45m16.14s

+24°12'43.50"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Faint but easily seen, near equal, well split to wide, ~2.5" , bluish due to faintness

STT155

7m1

10m9

15.1''

261°

2015

Gem

06h45m23.51s

+24°40'20.90"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Pretty orange star with 2x fainter B, also orange, due west, ~6"

BRT146

11m2

11m8

3.6''

47°

2015

Gem

06h45m55.18s

+24°05'58.00"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Faint, 1 delta mag, ~1.5" well split

★

COU472

11m4

11m3

1.9''

83°

2015

Gem

06h46m07.21s

+22°33'06.80"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Faint but very fine pair, really pretty in the field, a little blue, half delta mag, ~1.5" Nice

★★★

STF948, 12 Lyn

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.

★

HO238

8m9

9m1

0.3''

174°

2013

Gem

06h46m20.91s

+18°12'08.20"

Mark McCarthy

Fremont (California/USA)

508mm (1067x)

Barely hairline split at best moments, but conditions have a lot of haze and bloating. A half delta mag is noticeable. I can tell the star is a pair at 333x, but no where near resolvable

HWE15

8m9

10m3

13.2''

218°

2015

CMa

06h46m35.21s

-20°34'45.80"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Orange, a wide faint blue B star

POU2009

12m6

12m7

6.4''

215°

2015

Gem

06h47m00.33s

+23°35'21.90"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Just barely there, averted vision brightend it up, but I can still pull it out direct. Faint, bluish, wide, near equal

BRT2362

11m9

12m6

3.4''

7°

2015

Gem

06h47m12.56s

+17°27'46.50"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Dare I say a glittering pair, faint but it twinkles, wide, bluish, probably parts of a plus one about twice as separated but with similar mag [not physical]

STT157

7m2

9m2

0.6''

161°

2018

Mon

06h47m47.56s

+00°20'24.50"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

Yellow A, widely separated from blue B. 2 magnitude difference. Did not notice 0.8" separation in A

J992

11m5

12m3

4.0''

100°

2015

Gem

06h48m08.72s

+16°53'16.60"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

B star almost needs averted vision to see, but shows up direct when seeing stills. Wide ~5", 1 delta mag, nice pair [not physical]

★

STF958

6m3

4.5''

77°

2019

Lyn

06h48m12.29s

+55°42'15.10"

Robert Zebahl Leipzig (Germany)	70mm (33x)	Clearly split, equally bright, close together. Nice view.
Robert Zebahl Leipzig (Germany)	102mm (62x)	Very nicely split. Both components appear similarly bright and white-yellowish.

STF972

A-BC

8m3

9m3

12.5''

154°

2016

CMa

06h48m22.15s

-15°19'47.30"

Rene Merting

Drachhausen (Germany)

100mm (64x)

bei 64x ein schwaches, unscheinbares, etwas mehr als knapp getrenntes Sternpaar - B im SO ist nur unwesentlich schwächer (lt. Stelle Doppie aber doch 0.99 mag)

A58

7m4

8m7

5.0''

161°

2015

Mon

06h48m35.78s

-04°04'32.60"

Rene Merting

Drachhausen (Germany)

100mm (64x)

bei 64x ein knapp getrenntes Pärchen - Komponente B im Süden ist eine Größenklasse schwächer und wirkt grau

WFC46 & PAL3

WFC46

11m4

11m7

9.2''

297°

2015

Gem

06h51m02.45s

+19°14'40.00"

PAL3

11m7

13m5

5.6''

295°

2015

Mark McCarthy Fremont (California/USA)	508mm (333x)	WFC46 (AB): Wide bluish pair about half delta mag. I see a third star with averted vision pretty close to one of these stars, ~3-4" interesting [PAL 3 BC, 11.65/13.50 5.6"]
Mark McCarthy Fremont (California/USA)	508mm (333x)	PAL3 (BC): Third star seen with averted vision pretty close to WFC 46 B, ~3-4"

POU2065

12m1

12m9

4.8''

175°

2015

Gem

06h51m25.93s

+24°25'17.40"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Pretty faint, pulled out with averted and held there, wide, about half delta mag. [not physical]

POU2072

9m5

11m3

9.8''

38°

2015

Gem

06h51m42.09s

+23°14'36.40"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Easy, white and blue, ~1.5 delta mag, pretty wide

HJ740

8m2

9m1

21.2''

9°

2015

Mon

06h51m46.17s

+00°27'35.90"

Rene Merting Drachhausen (Germany)	18x70	Komponente B ist nördlich von A knapp getrennt erkennbar - Helligkeitsunterschied vielleicht eine Größenklasse
Rene Merting Drachhausen (Germany)	100mm (32x)	bei 32x ein ordentlich getrenntes Sternpaar - Komponente B wirkt halb so hell wie A

STF974, 59 Aur

6m1

10m2

22.2''

224°

2015

Aur

06h53m01.41s

+38°52'08.90"

10m2

12m8

25.6''

219°

2015

Robert Zebahl

Leipzig (Germany)

102mm (28x)

AB: Easy, moderate distance, pretty uneven. A appeared white-yellowish, B only as a tiny star.

STF985

7m8

8m4

32.6''

323°

2017

Mon

06h53m56.06s

-04°23'32.80"

Rene Merting Drachhausen (Germany)	18x70	leicht (bequem getrennt) und schön mit Farbkontrast - Komponente A im Südwesten ist leicht gelblich, B wirkt dagegen grau - ein paar schwächere Sterne im Umfeld sorgen dafür, dass der Doppelstern noch etwas mehr hervor gehoben erscheint
Rene Merting Drachhausen (Germany)	100mm (20x)	bei 32x ein weite Trennung - ein schöner Farbkontrast, Komponente A südöstlich ist weißgelb, B im NW dagegen ist zartorange - zurück auf 20x ordentliche Trennung

★

STF982, 38 Gem

4m8

7m8

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)	203mm (333x)	38 Gem. Light yellow A and blue B, quite wide, very pretty. AC much wider separation much fainter not noticed
Mark McCarthy Fremont (California/USA)	317mm (553x)	Pretty yellow and orange, 2 delta mag, wide separation
Mark McCarthy Fremont (California/USA)	371mm (553x)	Bright orange and slightly red star, 2-3 delta mag.

H5 65, 17 CMa

5m8

8m7

42.9''

147°

2015

CMa

06h55m02.74s

-20°24'17.50"

5m8

9m2

48.5''

187°

2015

5m8

9m7

128.8''

187°

2015

8m7

9m2

31.3''

247°

2015

9m2

9m7

80.4''

187°

2015

Rene Merting Drachhausen (Germany)	18x70	AB: ein mehr als ordentlich getrenntes Pärchen - Komponente B im SO ist gut 2.5 Größenklassen schwächer, aber noch gut erkennbar - schöner Farbkontrast
Rene Merting Drachhausen (Germany)	100mm (107x)	AB: bei 32x getrenntes Paar, Komponente B im Süden deutlich schwächer AC: bei 107x wird westlich von Komponente B ein noch schwächerer Stern sichtbar, Komponente C - dieser Stern steht minimal weiter weg von A als B

J273

9m9

10m3

4.4''

340°

2017

Gem

06h55m18.52s

+12°35'07.00"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Near equal white, pretty wide

STF981

8m7

9m0

0.9''

119°

2016

Gem

06h55m28.54s

+30°09'42.30"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Very close orange pair, equal magnitude. Clean split, ~1".

HN 123, pi CMa

4m7

9m6

11.6''

13°

2015

CMa

06h55m37.40s

-20°08'11.70"

Rene Merting

Drachhausen (Germany)

100mm (107x)

bis 107x vergrößert, aber mehr als eine kleine kaum wahrnehmbare Ausbeulung nach Norden war nicht drin - höher Vergrößern wegen schlechtem Seeing nicht ratsam in der Nacht - kurios, der Stern strahlte zweifarbig, bläulich im Norden und ein helloranger Rand im Süden - ob das ein Dispersionseffekt war oder hervorgerufen aufgrund der beiden eng stehenden Sterne, vermag ich nicht zu sagen

HO27

9m6

10m1

3.7''

127°

2015

Gem

06h56m03.65s

+20°05'03.20"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Nice near equal, though mag difference is notable. Third slightly brighter a bit further out [this is AC, 9.64/9.71 23"]

STF991

8m0

9m2

3.8''

165°

2019

Gem

06h57m01.26s

+24°57'27.90"

Mark McCarthy Fremont (California/USA)	317mm (553x)	White and orange, 2 delta mag, ~5", PA to S.
Mark McCarthy Fremont (California/USA)	508mm (333x)	Pretty off-yellow A and a little ruddy red B, nice

STT159, 15 Lyn

4m5

5m5

0.7''

236°

2017

Lyn

06h57m16.60s

+58°25'23.00"

Uwe Pilz Leipzig (Germany)	105mm (200x)	nicht getrennt im April 2020
Frederik Wanink Itterbeck (Germany)	254mm (640x)	relativ einfach

★

A2459

9m8

0.4''

274°

2008

Gem

06h57m39.64s

+19°35'04.10"

Mark McCarthy

Fremont (California/USA)

508mm (1067x)

Notched near equal at best moments

★

STTA80

7m2

7m4

124.1''

53°

2015

Gem

06h58m06.59s

+14°13'43.40"

7m2

8m4

81.2''

112°

2015

Robert Zebahl

Leipzig (Germany)

70mm (22x)

All 3 components form a striking triangle and are slightly different in color. A (western component): white-bluish; B (northern component): white-yellowish; C (southern component): orange, partly slightly reddish.

../projects/double-stars/robert-zebahl/sketches/2019-12-18_stta80.jpg

STF1004

8m1

9m7

20.5''

89°

2015

Mon

06h58m27.93s

-11°25'51.40"

Rene Merting

Drachhausen (Germany)

100mm (20x)

bei 32x ein schickes Pärchen, komfortabel getrennt - Komponente B im Osten ist deutlich schwächer, mindestens 1.5 Größenklassen - Farbkontrast, weil B so schwach ist - zurück auf 20x gelingt die Trennung weiterhin

★

CPO7, eps CMa

1m5

7m5

7.9''

162°

2008

CMa

06h58m37.55s

-28°58'19.50"

Mark McCarthy

Fremont (California/USA)

203mm (113x)

Adhara, epsilon Canis Majoris: Wow! Bright (+1.5 magnitude) and large A with small and much fainter close B (magnitude +7.5) to the south. Lovely double

STF1000

AB-C

8m1

9m0

22.1''

67°

2016

Gem

06h59m21.15s

+25°14'00.20"

Rene Merting

Drachhausen (Germany)

100mm (32x)

bei 32x ein bequem getrenntes Pärchen - Komponente AB kühlweiß - Komponente C im Osten ist eine dreiviertel Größenklasse schwächer und grauweiß

STF994

7m9

8m1

26.4''

55°

2017

Aur

06h59m27.19s

+37°05'53.50"

Robert Zebahl

Leipzig (Germany)

55mm (25x)

Well separated, large distance, slight difference in brightness.

★

STF1007

7m4

11m4

14.6''

300°

2015

Gem

07h00m37.12s

+12°43'24.20"

7m4

10m0

21.9''

244°

2015

7m4

7m7

67.7''

28°

2016

Robert Zebahl

Leipzig (Germany)

70mm (22x)

AD: Wide separation, small difference in brightness. Slight difference in color, but difficult to describe. Component A at least seemed rather white. South of STF1007 there is also the double star HJ3288 and the star HD52976, which appears in a bright orange. Together in one field of view a beautiful sight.

../projects/double-stars/robert-zebahl/sketches/2019-12-18_stf1007_hj3288.jpg

★★

BU100

7m3

11m1

3.2''

261°

1978

Gem

07h00m56.55s

+12°24'00.40"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Pretty orange and blue. 4 delta mag, PA to west. Wide separation ~3" B is just seen, a very fine point.

STT163

7m2

8m2

0.2''

99°

1997

Mon

07h01m09.85s

+11°46'28.70"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Not perfectly round AB, a faint bluish haze in the diffraction to the south. Marginal.

STF1010

7m7

8m8

22.3''

7°

2017

Mon

07h01m27.05s

-03°07'03.30"

Rene Merting

Drachhausen (Germany)

18x70

ein schönes enges Pärchen - Komponente B zeigt sich nicht zu knapp getrennt nördlich von A - Helligkeitsunterschied eine Größenklasse - zwei sehr schwache Sterne flankieren nahezu symmetrisch im SO und SW das Paar - netter Anblick

BU573

7m2

7m8

0.8''

311°

2018

Mon

07h01m49.89s

-10°52'56.30"

Uwe Pilz

Leipzig (Germany)

105mm (247x)

schwach gekerbt

../projects/double-stars/uwe-pilz/sketches/bu573.jpg

★

HJ3288

7m3

8m7

38.5''

247°

2015

Gem

07h02m18.43s

+12°34'54.20"

Robert Zebahl

Leipzig (Germany)

70mm (22x)

Easy to separate with moderate angular distance and a significant difference in brightness. Slight difference in color: white-yellowish, slightly orange. Nice view together with the double star STF1007 and HD52976, which appears in a bright orange. Sketched together with STF1007.

★

A2462

9m2

9m0

0.2''

259°

2018

Gem

07h02m37.42s

+15°58'26.50"

Mark McCarthy

Fremont (California/USA)

508mm (1067x)

Short period list. Notched, noticeable magnitude difference, B star pointed in direction of apex of right triangle it forms with two other eighth magnitude stars. Light orange stars

★

HO342

8m0

8m7

1.2''

89°

2016

Gem

07h02m50.54s

+13°05'21.70"

Mark McCarthy Fremont (California/USA)	317mm (553x)	Yellow-orange and blue stars, PA to the east, 1 delta mag, tight but well split ~1".
Mark McCarthy Fremont (California/USA)	371mm (553x)	Split when seeing stills. orange A and yellowing B, 1.5-2”

A1575

8m6

9m3

0.8''

283°

2016

Lyn

07h03m01.14s

+54°02'55.40"

Robert Zebahl Leipzig (Germany)	102mm (160x)	Not clearly visible as double star.
Robert Zebahl Leipzig (Germany)	152mm (225x)	2020-03-23: At 225x and 300x clearly elongated, partly seen as figure '8'.

★★

STF1001

7m8

9m4

9.1''

66°

2019

Lyn

07h03m05.51s

+54°10'26.60"

7m8

9m3

9.9''

58°

2019

9m4

9m3

1.6''

5°

2019

Robert Zebahl Leipzig (Germany)	102mm (160x)	2020-03-23: At 28x the pair A-BC is easy to separate. At 160x, the very close pair BC shows split. The component A appears slightly orange.
Uwe Pilz Leipzig (Germany)	105mm (88x)
Robert Zebahl Leipzig (Germany)	152mm (129x)	2020-03-23: At 22x, the wide pair A-BC already appears separated, but still very tight. At 69x, A appears in a decent orange. The pair BC shows elongated and rather greenish-bluish. At 100x BC is already visible as figure '8' and almost separated, at 129x clearly separated. Components B and C are still very close together and equally bright. The color impression remains. An interesting and rewarding triple system!

STF1009

6m9

7m0

4.4''

148°

2019

Lyn

07h05m39.83s

+52°45'31.30"

Robert Zebahl

Leipzig (Germany)

70mm (33x)

Very nice view. Equally bright components, tight.

★★

STF1014

9m9

2.0''

221°

2017

Gem

07h05m44.95s

+26°08'25.30"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Very faint near equal brightness pair, ~3", PS to the SW.

ENG28

7m9

7m7

171.9''

99°

2015

Gem

07h08m00.24s

+15°31'42.90"

Mark McCarthy

Fremont (California/USA)

80mm (13x)

Pretty, wide equal finder split, white, nice field.

STT165, 45 Gem

5m4

10m9

16.0''

6°

2015

Gem

07h08m22.04s

+15°55'51.30"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

45 Gem. With apodizing mask. Bright light orange and very wide eleventh mag B, 4-5 delta mag, ~15". [not physical]

STTA83 & HO519

HO519

7m2

13m0

32.5''

73°

2015

Gem

07h09m35.47s

+25°43'44.70"

STTA83

7m2

7m8

123.3''

79°

2015

Robert Zebahl

Leipzig (Germany)

70mm (22x)

STTA83 (AC): Wide pair, relatively bright, moderate difference in brightness. A: slightly orange; C: grey-blue. Southeast of the pair in a much larger distance there is another, fainter star, which appears orange, partly reddish. It does not belong to the system. All three stars form a beautiful right-angled triangle.

HJ3934

A-BC

6m9

8m5

13.6''

238°

2017

CMa

07h11m20.93s

-21°48'11.80"

Uwe Pilz

Leipzig (Germany)

105mm (180x)

schwach

HDS999

6m4

9m1

0.3''

7°

2012

CMi

07h12m07.50s

+05°28'27.70"

Mark McCarthy

Fremont (California/USA)

508mm (1067x)

I detect a bluish bump on one side of the orange A star at best moments, and assume this is the B star, but I'm unsure. It is just a discoloration along the rim with a very slight bump out. Seeing is not good enough to resolve

WEI14

7m8

8m9

2.1''

160°

2012

Gem

07h12m48.16s

+15°10'41.90"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

A yellow-orange, blue B, 1 delta mag, PA to south. Nice!

STF1037

7m2

7m3

0.8''

304°

2018

Gem

07h12m49.08s

+27°13'30.20"

Uwe Pilz Leipzig (Germany)	105mm (260x)	eingekerbt
Frederik Wanink Itterbeck (Germany)	254mm (640x)	leichter, gleich hell

J59

10m2

10m4

1.5''

205°

2015

CMi

07h13m09.27s

+02°50'40.80"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Faint pair, but seen nicely. Blue-white stars, near equal, ~1.5", nearly wide

STT167

7m4

10m9

5.1''

163°

2017

Gem

07h13m30.95s

+32°08'43.70"

Robert Zebahl Leipzig (Germany)	70mm (133x)	Too faint for a separation. Primary component visible, no sign of the companion. Observation from city at moon (83%).
Robert Zebahl Leipzig (Germany)	152mm (270x)	At a position angle of about 180° I sometimes had the feeling to see something of the faint companion, but not sure.

STF1048

9m1

10m1

5.9''

351°

2018

CMi

07h14m14.25s

+04°12'26.50"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Pretty wide, >1 delta mag, light orange stars

STF1033

7m8

8m4

1.5''

278°

2017

Lyn

07h14m48.05s

+52°32'44.10"

7m8

10m2

79.6''

273°

2015

Robert Zebahl

Leipzig (Germany)

102mm (160x)

The pair AB appears clearly separated, but still pretty tight with a well visible difference in brightness. The faint C component is wide apart at a similar position angle.

../projects/double-stars/robert-zebahl/sketches/2020-03-23_stf1033.jpg

BRT1227

9m9

11m7

8.1''

321°

2015

CMi

07h15m03.14s

+10°51'25.60"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Light yellow-orange A is easy to see, the B star is much fainter, can see with direct vision but sharpens with averted vision. Transparency is poor and the sky is bright with a waxing moon

STF1056

8m0

8m9

3.9''

299°

2017

Mon

07h15m34.34s

-01°51'36.80"

Mark McCarthy

Fremont (California/USA)

317mm (170x)

Wide reddish pair.

★★

HJ3945, 145 CMa, Winter Albireo

5m0

5m8

26.8''

50°

2015

CMa

07h16m36.84s

-23°18'56.10"

Rene Merting Drachhausen (Germany)	8x30	Winter-Albireo - ein eng stehendes Pärchen, ganz knapp getrennt - Komponente A im SW knallig orange, bei B ist schwer eine Farbnuance erkennbar, eher weißlich und deutlich schwächer als A
Rene Merting Drachhausen (Germany)	10x50	ein knapp getrenntes Paar (nicht besser als im 8x30) - Komponente A leicht gelblich, B ist kühler, weißlich
Rene Merting Drachhausen (Germany)	18x70	ein gut getrenntes Pärchen - Komponente A im Südwesten ist apfelsinenorange, B wirkt anfangs eisblau, bei längerer Betrachtung weißgrau
Rene Merting Drachhausen (Germany)	100mm (20x)	bei 32x leuchtet Komponente A goldgelb, B im NO wirkt weiß ohne den erwarteten Farbstich, auch nicht bei 107x und auch nicht, wenn ich die Sterne leicht unscharf stelle - trotzdem sehenswert - auch bei 20x zeigen sich beide Sterne ordentlich voneinander getrennt, A strahlt jetzt noch tiefgelber, fast orange
Uwe Pilz Leipzig (Germany)	105mm (37x)	soforrt auffallend, blau-orange
Robert Zebahl Leipzig (Germany)	120mm (23x)	Evident, easy to split at large angular distance. Brighter component appeared very orange, fainter one bluish.

STT170

7m4

7m7

0.6''

288°

2018

CMi

07h17m38.51s

+09°17'31.50"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Notched, near equal at 333x. At 667x, hairline split very easy to see, near equal white stars

HEI725

10m5

10m7

1.1''

349°

2016

CMi

07h18m06.19s

+10°34'53.40"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Faint pair but sharp with seeing, nicely split ~1", less than half magnitude difference but it is noticeable. Nice pair

BRT1229

9m9

11m1

4.5''

353°

2015

CMi

07h18m20.96s

+10°50'07.40"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

B star needs averted vision to appear, widely separated ~4", faint light yellow A but there's a significant magnitude difference. [not physical]

BAL2265

10m0

10m4

14.0''

93°

2016

CMi

07h18m30.00s

+03°27'37.00"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Faint, B actually needs averted vision to see well, very wide pair. conditions bad [not physical]

STF1068

9m3

9m8

4.1''

350°

2019

Gem

07h19m49.31s

+13°22'22.40"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Pumpkin orange pair, near equal magnitude, PA to north. Well separated ~4". Nice.

STF1050

8m1

8m8

19.3''

21°

2017

Lyn

07h19m51.29s

+54°55'18.40"

Robert Zebahl Leipzig (Germany)	70mm (22x)	Rather faint, obviously split with visible difference in brightness. View similar to STF 1062.
Robert Zebahl Leipzig (Germany)	102mm (28x)

A2862

8m4

9m6

0.8''

62°

2017

CMi

07h20m02.62s

+03°46'36.50"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Very close, less than one disk width, 2 delta mag, light orange stars. Tough. Can't see B star at 667x

STF1066, delta Gem, 55 Gem

3m5

8m2

5.4''

234°

2017

Gem

07h20m07.39s

+21°58'56.40"

Robert Zebahl Leipzig (Germany)	55mm (71x)	Large difference in brightness. The fainter component was well separated, but just a very tiny star.
Robert Zebahl Leipzig (Germany)	102mm (160x)	Easy to separate with relatively large distance. The companion appeared as a tiny, faint star.
Uwe Pilz Leipzig (Germany)	105mm (288x)	erster Ring in SSW heller, zweiter nur an dieser Stelle sichtbar
Mark McCarthy Fremont (California/USA)	317mm (553x)	Wasat = Delta Geminorum: Pretty white-yellow and red-orange pair, PA to west, ~4".

A2863

9m3

9m5

1.2''

288°

2015

CMi

07h20m09.95s

-00°01'11.50"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

White near equal, very fine pair in dense field

STF1074

7m4

7m8

0.8''

172°

2015

CMi

07h20m31.07s

+00°24'13.10"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Very nice, touching disks to hairline. White, near equal. Great! [There are three other fainter BU pairs not noticed.]

STF1073

7m9

10m2

9.0''

67°

2015

CMi

07h21m00.62s

+10°11'44.20"

Mark McCarthy

Fremont (California/USA)

508mm (553x)

Pretty pair, wide, ~3 delta mag, blue-white A and ruddy B

STF1076

9m5

9m6

2.9''

108°

2015

CMi

07h21m01.96s

+04°03'23.60"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Very fine near equal white stars, well split

STF1070

8m7

9m3

1.7''

324°

2019

Gem

07h21m21.87s

+34°01'36.20"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Pretty close, 1.5", white, 1 delta mag, PA to NW.

STF1065, 20 Lyn

7m5

7m7

14.9''

256°

2017

Lyn

07h22m15.11s

+50°08'55.70"

Robert Zebahl

Leipzig (Germany)

70mm (22x)

Nicely split, moderate distance, similarly bright.

STF1062, 19 Lyn

5m8

6m7

14.8''

316°

2018

Lyn

07h22m52.06s

+55°16'53.30"

Robert Zebahl Leipzig (Germany)	70mm (22x)	Clearly separated, moderate distance, noticeable difference in brightness. The colors seemed different, but not exactly definable.
Robert Zebahl Leipzig (Germany)	102mm (28x)
Uwe Pilz Leipzig (Germany)	105mm (21x)
Robert Zebahl Leipzig (Germany)	152mm (22x)	Easy to separate, but still quite close together with visible difference in brightness. Colorwise unremarkable.

J366

8m9

10m4

2.3''

136°

2015

CMi

07h24m01.28s

+12°04'27.40"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Pretty pairing, ~2.5", light yellow-orange A and a deepter yellow-orange B, 2 delta mag. Nice pair

★

STF1081

7m7

8m5

1.9''

234°

2019

Gem

07h24m08.94s

+21°27'28.00"

7m7

9m9

107.0''

63°

2015

Robert Zebahl Leipzig (Germany)	102mm (28x)	AC: Rather wide apart from component A with noticeable difference in brightness. Less conspicuous.
Robert Zebahl Leipzig (Germany)	102mm (86x)	AB: At 86x just separated, very close together with moderate difference in brightness. In relation to A, the components B & C are almost opposite each other. At 125x, A & B are easy to split.

A2865

10m3

10m6

0.6''

107°

1997

CMi

07h24m40.32s

+05°16'51.00"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

At 533x i can tell is it not single, it's a bit smudgy, and with averted vision it clearly flashes an elongation. At 1067x I can't get a clean enough focus to resolve due to seeing

J1063

10m6

10m9

2.6''

56°

2015

CMi

07h25m19.23s

+03°12'10.70"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

B is on edge of direct vision, I can see some smudge there with direct vision but averted vision clears it up. ~2", 1.5 delta mag

STF1083

7m3

8m1

6.8''

45°

2015

Gem

07h25m35.30s

+20°29'42.60"

Robert Zebahl Leipzig (Germany)	70mm (22x)	Unequal pair. At 22x very tight, at 44x well split. Fainter companion appeared slightly orange, brighter one white-bluish.
Mark McCarthy Fremont (California/USA)	317mm (553x)	Equal wide, white.
Mark McCarthy Fremont (California/USA)	317mm (553x)	White, equal brightness, PA to NE.

HO346

7m0

11m7

13.2''

59°

2015

Gem

07h25m54.13s

+18°08'51.00"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Orange and much fainter blue B, ~10” 3 delta mag. Nice!

STF1090

7m3

8m2

60.8''

98°

2017

Gem

07h26m27.33s

+18°31'00.80"

7m3

9m5

49.9''

79°

2015

8m2

9m5

20.9''

328°

2015

Mark McCarthy Fremont (California/USA)	317mm (553x)	AC: Pretty finder split, equal white. Is a 2+1 with 2x fainter BC.
Mark McCarthy Fremont (California/USA)	317mm (553x)	BC: Is a 2+1 with AC, C is 2 delta mag than fainter B.

A2866

9m3

10m0

0.6''

138°

1991

CMi

07h26m39.08s

+04°23'34.10"

Mark McCarthy

Fremont (California/USA)

508mm (1067x)

B seen only at the best moments, and very briefly as a very faint star ~0.5" sep and very much fainter than A star. Frustratingly tough since this should not be a problem usually except for tonight's poor transparency and average seeing

STF1095

8m6

9m3

10.3''

78°

2015

CMi

07h27m22.75s

+08°45'14.00"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

White stars, wide, 1 delta mag

STF1094

7m6

8m5

2.5''

97°

2019

Gem

07h27m25.99s

+15°18'59.00"

Robert Zebahl

Leipzig (Germany)

70mm (57x)

At 57x barely split with noticeable difference in brightness. At 100x well split, but still tight.

S548

7m0

8m9

35.1''

277°

2015

Gem

07h27m40.54s

+22°08'29.30"

Rene Merting Drachhausen (Germany)	100mm (20x)	bei 32x ein weit getrenntes Paar - Komponente A strahlt schwach gelblich … eher dunkelgelb - Komponente C im Westen von A ist gut 1.5 Magnituden schwächer und dunkelgrau bis lachsorange - der Doppelstern steht isoliert, fällt aber nicht übermäßig auf - zurück auf 20x ist das Paar weiterhin gut getrennt erkennbar
Mark McCarthy Fremont (California/USA)	317mm (553x)	Orange with a 2x fainter white star, PA slightly SW. AB is 12th mag and not seen

BU21, eta CMi

5m2

11m1

4.3''

28°

2015

CMi

07h28m02.08s

+06°56'31.50"

Mark McCarthy

Fremont (California/USA)

508mm (213x)

Eta CMi: Easy bright yellowish star with a reddish much fainter B, wide

BAL1098

9m3

10m8

6.6''

122°

2015

CMi

07h28m12.83s

+00°35'16.90"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Easy pair, creamy white A and 3 delta mag B, wide

STF1103

7m1

8m6

4.2''

244°

2019

CMi

07h30m33.61s

+05°15'16.80"

Uwe Pilz Leipzig (Germany)	105mm (137x)	einfach, unscheinbar
Mark McCarthy Fremont (California/USA)	317mm (170x)	Pretty blue-white and orange-red stars, close but split.

STF1108

6m6

8m2

11.7''

179°

2017

Gem

07h32m50.63s

+22°53'15.40"

Rene Merting Drachhausen (Germany)	100mm (32x)	bei 32x ein sehr ungleiches enges Paar, aber klar getrennt - Komponente B im Süden ist knapp zwei Größenklassen schwächer - Komponente A buttergelb - zurück auf 20x verschmilzt Komponente B förmlich mit A zu einer sehr ungleichen 8, in guten Momenten sind beide Sterne aber dennoch schon getrennt sichtbar
Uwe Pilz Leipzig (Germany)	105mm (130x)	einfach
Mark McCarthy Fremont (California/USA)	317mm (553x)	Orange stars, 2 delta mag, PA to south, ~8"

STF1116

7m8

8m5

1.7''

95°

2019

Gem

07h34m32.02s

+12°18'16.90"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Pretty tight white, near equal magnitude, 2-3", PA to east. Nice pair.

★★★

STF1110, alpha Gem, 66 Gem, Castor

1m9

3m0

5.4''

53°

2019

Gem

07h34m35.86s

+31°53'17.80"

1m9

9m8

69.8''

163°

2017

1m9

10m1

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.
Rene Merting Drachhausen (Germany)	100mm (107x)	AB: bei 32x wirkt der Stern leicht länglich - bei 107x stehen die beiden Sterne schön eng mit überlagernden Beugungsscheibchen, die Komponenten sind dennoch getrennt erkennbar - Komponente B im Osten ist eine halbe Magnitude schwächer - ganz schwacher Farbkontrast
Uwe Pilz Leipzig (Germany)	105mm (144x)	AB: blauweiß-weiß

STT174

6m6

8m3

1.9''

92°

2017

Lyn

07h35m56.00s

+43°01'51.40"

Robert Zebahl

Leipzig (Germany)

70mm (133x)

The obviously fainter component could be permanently seen in the right position angle as brightening on the first diffraction ring.

KU30

9m3

10m3

3.2''

110°

2001

Gem

07h35m59.79s

+34°19'41.10"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

About one delta mag, well split, slightly orange stars

STF1119

8m1

9m3

3.3''

353°

2019

Gem

07h38m30.23s

+33°42'41.40"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

V345 Gem, variable of the delta Scuti type. A is white with a pink tinge. B is light blue, about two delta mag, well split around 3"

★★

BRD2

9m2

9m5

0.9''

188°

2015

CMi

07h39m46.65s

+05°16'25.50"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Wow! Exceptionally fine pair, white, near equal, nicely split, just outside of Procyon's glare. Great! [AB,C 14th mag not seen]

BGH3

7m3

9m0

57.9''

113°

2017

Mon

07h39m59.33s

-03°35'51.00"

Rene Merting

Drachhausen (Germany)

18x70

beide Komponenten sind mit ordentlichem Abstand getrennt sichtbar - Komponente B im SO ist gut 1.5 Magnituden schwächer und wirkt gegen die strahlend weiße Komponente A eher graubraun

★★

STF1126

6m5

7m0

0.9''

176°

2017

CMi

07h40m06.99s

+05°13'51.90"

Mark McCarthy Fremont (California/USA)	203mm (333x)	A bit more delta mag than listed, split, white, rather bright pair
Mark McCarthy Fremont (California/USA)	317mm (553x)	Wow, very close <1" hair-split, near equal brightness

AG143

9m1

10m1

5.7''

98°

2015

CMi

07h41m10.49s

+01°08'18.10"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Pretty orange and blue, light colors, wide, faint

STF1123

9m2

9m8

3.6''

167°

2019

Gem

07h41m31.99s

+33°24'34.80"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Pretty white pair, ~3", slightly less than two delta mag

STF1132

8m1

8m5

20.1''

235°

2017

Mon

07h42m12.50s

-03°31'10.40"

Rene Merting

Drachhausen (Germany)

18x70

ein dicht stehendes Pärchen - Komponente B im SW ist nur leicht schwächer - leichter Farbunterschied - STF1132 fällt eher als Doppelstern auf als der ebenfalls weiter westlich im Gesichtsfeld stehende Doppelstern Bgh

STT179, kappa Gem, 77 Gem

3m7

10m0

7.2''

241°

2014

Gem

07h44m26.87s

+24°23'53.30"

Robert Zebahl Leipzig (Germany)	70mm (133x)	Observation at nearly full moon: Fainter companion was not visible.
Rene Merting Drachhausen (Germany)	100mm (213x)	bei 213x mit viel Geduld ist blickweise Komponente B südwestlich von A im Beugungsscheibchen erkennbar - kaum wie ein Stern, einfach nur eine schwache Aufhellung
Robert Zebahl Leipzig (Germany)	120mm (200x)	Although the optics were not yet completely cooled down, the fainter component could be seen slightly outside the first diffraction ring as a tiny star in moments of steady air.
Mark McCarthy Fremont (California/USA)	508mm (533x)	Kappa Gem. A looks like a kaleidoscope with the mask, colorful. B is a nice fine 8th mag star, a white hard point. Well separated ~8"

A674

8m2

9m8

1.1''

125°

2008

Gem

07h44m38.11s

+31°06'50.10"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Very close and faint, just split

STF1107

8m7

10m1

1.2''

213°

1991

Cam

07h45m14.87s

+75°47'51.40"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Wide separation, 1 delta mag, PA to NW.

HO246

7m6

11m6

2.6''

227°

1991

Gem

07h45m32.14s

+25°59'19.20"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

A is an orange star, pretty bright, B only shows with averted vision and I can barely it hold direct. ~2". white

STF1122

7m8

14.4''

185°

2017

Cam

07h45m52.47s

+65°09'28.10"

Rene Merting

Drachhausen (Germany)

320mm (45x)

bei 72x ein gut getrenntes Pärchen zweier gleich heller Sterne - trotz vieler gleich heller Sterne im Gesichtsfeld wirkt das Doppel gut isoliert

HO247

7m7

9m2

0.4''

259°

2010

Gem

07h46m07.95s

+21°07'19.20"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Clean split with seeing, 1 delta mag, fairly bright pair. I found the apodizing mask worked better than the 8-inch mask, gave more resolving power. The 8-inch was only snowman

STF1137

8m0

9m1

2.9''

133°

2010

CMi

07h46m35.35s

+04°07'50.10"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Light orange and blue, pretty wide, 1.5 delta mag

★★

STF1127

7m0

8m4

5.6''

340°

2019

Cam

07h47m00.43s

+64°03'07.30"

7m0

9m7

11.7''

179°

2017

8m4

9m7

17.0''

173°

2017

Rene Merting

Drachhausen (Germany)

320mm (45x)

AB: bei 45x ist B ganz dicht nördlich an A angrenzend erkennbar (knapp getrennt), B etwas heller als C im Süden - bei 72x wird die Trennung einfacher und alle drei Sterne stehen fast auf einer Linie
AC: bei 45x ist C ganz schwach südlich von A erkennbar - bei 72x schätze ich, etwas mehr als die doppelte Entfernung AB, C wirkt grau, während A und B weiß strahlen

STF1141

8m4

9m4

17.5''

10°

2017

CMi

07h47m02.47s

+00°01'06.10"

Rene Merting Drachhausen (Germany)	18x70	AB: ganz dicht nördlich über Komponente A ist B knapp getrennt als schwaches Murmelchen sichtbar, Helligkeitsunterschied schätzungsweise 1.5 Magnituden AD: nordöstlich von A in vierfachem Abstand AB ist Komponente D als schwaches Lichtpünktchen D erkennbar AE: Komponente E zeigt sich westlich von Komponente A in drei- bis vierfacher Entfernung wie AB, schwach
Rene Merting Drachhausen (Germany)	100mm (32x)	AB: Komponente B zeigt sich mehr als knapp getrennt nördlich von A - Komponente A ist doppelt so hell wie B AD: Komponente D ist mir nordöstlich in vierfachem Abstand AB auch noch aufgefallen und ich konnte drei bis vier weitere schwache Sterne erkennen, sicherlich alles weitere Komponenten dieses Mehrfachsystems

HO36

9m8

9m9

0.6''

306°

2008

Gem

07h47m34.74s

+25°28'08.90"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Very finely split blue-white stars, very slight mag difference. Pretty tough

STF1140

7m0

8m7

6.4''

273°

2015

Gem

07h48m22.61s

+18°20'12.40"

Robert Zebahl Leipzig (Germany)	70mm (44x)	Easy to separate with quite clear difference in brightness.
Mark McCarthy Fremont (California/USA)	508mm (205x)	Easy pair, light orange A and light blue B, 1 delta mag, wide ~8"

STTA88

7m5

8m9

57.1''

6°

2015

CMi

07h48m58.22s

+00°39'42.90"

Rene Merting Drachhausen (Germany)	18x70	ein einfacher Fernglas-Doppelstern - beide Komponenten sind gut sichtbar, weit getrennt voneinander - Komponente B im Norden ist gut 1.5 Magnituden schwächer - leichter Farbkontrast
Rene Merting Drachhausen (Germany)	100mm (20x)	bei 32x ein mehr als bequem getrenntes Paar - Komponente B im Norden ist halb so hell wie A - zurück auf 20x weiterhin eine ordentliche Trennung

STF1144

7m9

10m3

8.4''

358°

2018

Gem

07h49m00.84s

+28°34'26.40"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Fine pair, Bis a nice sharp hard point, very much fainter than yellowish A, widely separated ~8"

STF1149

7m8

9m2

21.7''

41°

2017

CMi

07h49m29.79s

+03°13'15.60"

Rene Merting

Drachhausen (Germany)

100mm (32x)

bei 32x zeigt sich Komponente B gut getrennt nordöstlich von A - Helligkeitsunterschied 1.5 Magnituden

STF1147

9m7

2.2''

175°

2019

Gem

07h50m19.69s

+24°31'55.80"

Mark McCarthy Fremont (California/USA)	317mm (553x)	Very fine 2", equal magnitude blue-white pair, PA to south, ~2".
Mark McCarthy Fremont (California/USA)	508mm (533x)	Nice near equal blue-white stars, wide ~2.5" [not physical, surprisingly]

★

COU926

9m5

9m7

0.3''

254°

2008

Gem

07h50m38.16s

+19°44'04.20"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Very tentative notched, noticable mag difference, only with seeing. Can't go to higher mag due to seeing

STTA89

6m8

7m7

76.8''

84°

2015

Gem

07h51m00.20s

+31°36'48.70"

Robert Zebahl

Leipzig (Germany)

70mm (22x)

At 22x widely separated with moderate difference in brightness. The primary component appeared whitish, at 44x rather white-yellowish. The companion appeared slightly orange.

★

BU101, 9 Pup

5m6

6m5

0.4''

304°

2018

Pup

07h51m46.31s

-13°53'52.80"

Mark McCarthy

Fremont (California/USA)

508mm (1067x)

9 Pup. Elongated to notched, orientation correct, light orange. Very tough. [B is coming off it's furthest orbit and will be exceptionally difficult in 10 years, but easier in 15 years]

COU928

9m2

9m7

5.6''

99°

2019

Gem

07h52m40.85s

+20°02'37.70"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

A is a light yellow-orange, easily 1 delta mag brighter than blue B. Wide, ~10"

STT182

7m8

7m9

0.9''

9°

2017

CMi

07h52m42.12s

+03°23'02.20"

Mark McCarthy Fremont (California/USA)	203mm (333x)	Compact white pair, more near equal than Sky Tools says, white, easy split
Mark McCarthy Fremont (California/USA)	317mm (553x)	Moderately bright A with 4 much fainter wide and close stars, forms a right triangle.
Mark McCarthy Fremont (California/USA)	317mm (553x)	Very close, ~1", near equal brightness white.

WEI17

9m0

9m3

7.0''

96°

2017

Gem

07h54m02.88s

+14°56'54.10"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Dual ninth mag pair, white, slight mag difference, very wide

COU951

9m9

10m7

3.1''

134°

2017

Gem

07h54m13.96s

+27°53'02.40"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Difficult given poor seeing and transparency this night. A is considerably more bright about half delta than B, white stars, split

ES422

8m4

10m8

14.9''

182°

2015

Gem

07h55m27.26s

+29°09'30.70"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

B revealed with averted vision only, clearly seen with averted vision with yellowish A, pretty wide

★

STT185

7m1

7m3

0.4''

22°

2018

CMi

07h57m16.39s

+01°07'37.30"

Mark McCarthy

Fremont (California/USA)

508mm (1067x)

Without the apodizing mask I get a clean split with seeing but constant split with the mask. Light orange stars, noticeable mag difference

STF1162

8m0

10m2

9.0''

327°

2015

Cnc

07h57m22.66s

+13°12'24.70"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Orange and blue, pretty wide.

STF1167

9m8

11m8

12.2''

229°

2015

Cnc

07h58m34.29s

+16°28'09.30"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Very faint pair, B seen with averted vision and seeing. 2 delta mag, near a bright star.

STF1170

8m7

9m1

2.4''

108°

2019

Cnc

07h59m45.52s

+13°41'19.90"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Close near equal pair, 2".

STF1171

6m5

9m9

2.0''

326°

2015

Cnc

08h01m00.78s

+23°34'59.20"

Rene Merting Drachhausen (Germany)	100mm (213x)	bei 142x schmiegt sich Komponente B an der Grenze zur Sichtbarkeit im Süden von Komponente A ganz dicht an den viel größeren Bruder, der ohne Beugungsringe auskommt - bei 213x zeigt sich B leicht abgesetzt von A
Robert Zebahl Leipzig (Germany)	102mm (187x)	Observation from the city at half moon. At magnifications between 187x and 280x I could see the very dim companion almost permanently near the first diffraction ring. But the diffraction ring itself was hardly visible. Main problem here was probably the low brightness of the companion.
Uwe Pilz Leipzig (Germany)	105mm (200x)	schwierig. Zu ahnen bei 144x
Mark McCarthy Fremont (California/USA)	317mm (553x)	Yellow and orange, 4 delta mag! very faint and close B

STF1173

8m5

9m9

10.4''

51°

2015

Cnc

08h01m23.12s

+16°56'58.00"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Wide, pretty faint

SHJ86

6m2

7m5

51.6''

81°

2018

Cam

08h02m30.82s

+63°05'25.20"

Rene Merting

Drachhausen (Germany)

320mm (45x)

bei 45x weit getrennt - Komponente A ist samtgelb, B strahlt weiß - trotzdem beide Sterne weit auseinander stehen, sind sie als Sternpaar erkennbar, weil die Sterne im unmittelbaren Umfeld allesamt schwächer sind

HO349

7m7

12m0

10.3''

227°

2015

Cnc

08h02m32.77s

+12°27'08.10"

Mark McCarthy Fremont (California/USA)	317mm (553x)	Light orange star and extremely faint B star, a fuzz at the edge of visibility in the correct position angle, ~10" separation
Mark McCarthy Fremont (California/USA)	317mm (553x)	Wide separation, 3 delta mag, faint B.

ES291

8m6

11m8

6.4''

348°

2017

Gem

08h02m44.02s

+32°11'09.10"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

B seen with averted vision only, but flashed out clearly. Wide, ~7"

STT186

7m7

7m9

1.1''

75°

2019

Cnc

08h03m18.52s

+26°16'03.50"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Close, 1" but easy split, near equal dull white color.

★

BU581

8m5

8m8

0.4''

226°

2018

Cnc

08h04m23.10s

+12°17'23.80"

Mark McCarthy Fremont (California/USA)	317mm (553x)	Light orange near equal, very small, elongated to notched.
Mark McCarthy Fremont (California/USA)	317mm (553x)	Orange A is not quite round. Marginal
Mark McCarthy Fremont (California/USA)	508mm (1067x)	With apodizing mask. Beautiful clean split, almost wide, light orange stars, slight mag difference. There is a third 2x fainter star further out, might be plus one. Wow. [3rd is AB-C, 8.46/11.78 5.5"]

AG337

9m9

10m2

2.7''

104°

2015

Gem

08h05m05.60s

+28°27'22.50"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Split, very close near equal orange-yellow stars

STF1182

7m5

8m8

4.9''

75°

2019

CMi

08h05m24.43s

+05°49'38.90"

Mark McCarthy Fremont (California/USA)	203mm (333x)	A white, B a little ruddy, wide, 2 delta mag
Mark McCarthy Fremont (California/USA)	317mm (553x)	White and reddish, 1 delta mag, PA due east.

STF1181

8m3

9m3

5.1''

141°

2019

Cnc

08h05m24.56s

+08°11'58.70"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Orange and blue, 3 delta mag, wide separation.

★

STF1177, 17 Cnc

6m7

7m4

3.6''

350°

2019

Cnc

08h05m37.06s

+27°31'46.90"

Robert Zebahl Leipzig (Germany)	70mm (57x)	Easy to separate, but still relatively close together. Well visible difference in brightness. Color of the components was not clearly visible. Nice view overall.
Rene Merting Drachhausen (Germany)	100mm (64x)	bei 107x sehe ich ein knapp getrenntes schön eng stehendes Pärchen - Komponente B im Norden ist eine dreiviertel Größenklasse schwächer - das Weiß von A wirkt kühler - zurück auf 64x sehe ich eine Ameise mit dünnem Hals, in ruhigen Momenten zeigen sich beide Sterne sogar getrennt
Uwe Pilz Leipzig (Germany)	105mm (144x)
Christopher Hay Seeheim (Germany)	125mm (160x)	Well split despite substantial turbulence in the atmosphere. Main component creamy yellow-white, companion pale blue. A very attractive colour contrast warranting a one-star rating.
Frederik Wanink Itterbeck (Germany)	254mm (640x)	getrennt
Mark McCarthy Fremont (California/USA)	317mm (553x)	Yellowish, 1 delta mag, ~4"

STF1186

7m1

10m1

3.3''

212°

2018

Cnc

08h08m49.61s

+27°28'49.40"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

11 Cnc: Orange with very faint B, ~3"

STF1188

8m7

9m3

16.5''

201°

2017

Cnc

08h09m23.95s

+30°20'49.30"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Wide separation, near equal white.

STF1187

7m2

8m0

3.1''

20°

2019

Cnc

08h09m30.45s

+32°13'18.80"

Robert Zebahl Leipzig (Germany)	70mm (57x)	Split. Components very tight with noticeable difference in brightness.
Mark McCarthy Fremont (California/USA)	317mm (553x)	Yellow and orange, 1 delta mag, 5"

BUP111

6m6

9m3

80.9''

49°

2016

Cnc

08h10m13.10s

+25°50'40.10"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

13 Cnc. Wide separation, orange A.

STF1191

10m3

10m8

3.6''

77°

2015

Cnc

08h10m47.59s

+19°01'51.90"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Very faint but well split, ~3", near equal pair

HJ777

9m6

11m7

10.6''

349°

2016

Cnc

08h11m29.33s

+10°41'05.40"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Very wide, faint

★★★

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!
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.

STF1197

9m0

9m7

1.8''

101°

2019

Cnc

08h12m44.45s

+29°32'30.90"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Very faint pair, 1 delta mag, ~2".

STF1201

8m1

9m5

6.7''

185°

2015

Cnc

08h12m52.51s

+09°34'40.00"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Pretty wide, 5", 1 delta mag.

STF1202

7m4

9m6

2.7''

305°

2015

Cnc

08h13m34.20s

+10°50'49.70"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Nice yellow-orange and 3 delta mag, B, same color, ~5-7"

H6 78

6m4

10m9

63.3''

300°

2015

Cnc

08h14m11.14s

+17°40'33.30"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

very wide, bright white, 3 delta mag.

LEP30

7m7

9m8

31.8''

238°

2015

Cnc

08h15m33.20s

+11°25'51.50"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Light orange with faint white star of ~11th magnitude, wide separation

STF1210

7m2

9m4

15.5''

113°

2015

Hya

08h15m48.54s

+02°48'05.00"

Rene Merting Drachhausen (Germany)	18x70	mit etwas Konzentration ploppt südöstlich von A ein kleiner schwacher Lichtpunkt auf, der nicht richtig klar zu sehen ist - in ruhigen Momenten Trennung sichtbar - Komponente B ist mindestens 2 Größenklassen schwächer
Mark McCarthy Fremont (California/USA)	317mm (553x)	Pretty wide greenish yellow pair, wide separation, 2 delta mag.

★★

STF1193

6m2

9m7

42.4''

90°

2015

UMa

08h20m40.32s

+72°24'26.00"

Rene Merting

Drachhausen (Germany)

320mm (45x)

bei 45x … oh wow, was für eine Farbe bei Komponente A - so ein intensives Gelb habe ich noch nirgends gesehen, gleißendes Rapsgelb - die deutlich schwächere Komponente B im Osten in weitem Abstand ist bei der Farbe von A eher uninteressant, B ist ohnehin nur grau schimmernd

★

STF1223, phi 2 Cnc

6m2

5.4''

218°

2019

Cnc

08h26m47.08s

+26°56'07.80"

Uwe Pilz

Leipzig (Germany)

105mm (88x)

sehr schön, blauweiß-gelbweiß

../projects/double-stars/uwe-pilz/sketches/stf1223.jpg

STF1230

9m3

10m6

34.2''

186°

2015

Cnc

08h28m25.95s

+16°51'09.10"

Uwe Pilz

Leipzig (Germany)

105mm (200x)

Komponente B nur indirekt. bei 88x erahnbar.

../projects/double-stars/uwe-pilz/sketches/200323STF1230.jpg

★

A551, LO Hya

7m0

7m1

0.4''

63°

2018

Hya

08h28m29.16s

-02°31'01.60"

Mark McCarthy

Fremont (California/USA)

508mm (1067x)

LO Hya. With apodizing mask. Easy split, noticeable half delta mag. Another fainter star further out likely +1 [The +1 is STF 1233 AB-C, 6.42/10.49 18.3". AB at furthest extent of orbit, will tighten considerably the next 20 years]

A2893

9m8

9m4

0.7''

351°

2015

Hya

08h30m05.67s

+05°13'03.90"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Closely split, noticeable ~1 delta mag, good pair

STF1243

7m8

9m4

1.7''

233°

2017

Hya

08h33m53.79s

+01°35'07.50"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Well split ~2", 2 delta mag, blue-white A and dull white B

★★

STF1245

6m0

7m2

10.1''

25°

2018

Cnc

08h35m51.05s

+06°37'13.90"

6m0

10m7

100.4''

109°

2017

6m0

11m9

110.3''

292°

2017

6m0

9m6

114.8''

207°

2017

Robert Zebahl Leipzig (Germany)	70mm (57x)	AB at 22x separated, but very close, uneven pair. A appeared white-yellowish, B orange, partly reddish. Opposite in a wide separation the fainter component E was visible. At 57x, A appeared white-yellowish, B orange.
Rene Merting Drachhausen (Germany)	100mm (32x)	AB: bei 32x ein sehr enges Pärchen, gerade so getrennt - das Sternpaar ist heller, als viele andere Sterne in der unmittelbaren Umgebung, dadurch ist es sehr auffällig - Komponente A strahlt reinweiß, B steht dem in nichts nach, auch wenn die Komponente gut eine Magnitude schwächer ist
Uwe Pilz Leipzig (Germany)	105mm (88x)	AB
Mark McCarthy Fremont (California/USA)	508mm (533x)	AB: Wide and bright pair, light yellow and orange, easy, slight mag difference

AG154

9m6

9m8

2.7''

1°

2019

Cnc

08h36m55.78s

+23°14'49.10"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

HO Cnc. Near equal well separated, light orange stars

J1008

10m9

11m1

3.1''

20°

2002

Hya

08h39m23.43s

-00°16'32.00"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Easy pair, not too faint, wide ~3", equal mag. [not physical]

STF1255

7m3

8m6

26.0''

30°

2015

Hya

08h39m43.80s

+05°45'51.40"

Rene Merting

Drachhausen (Germany)

100mm (20x)

bei 20x und 32x ein ordentlich getrenntes Sternpaar - Komponente B im NW strahlt nicht ganz so weiß wie A - Helligkeitsunterschied eine halbe Größenklasse (1.23 mag laut Stelle Doppie!)

STN61

8m4

9m4

4.6''

203°

2015

Pyx

08h40m17.61s

-32°09'54.90"

Mark McCarthy

Fremont (California/USA)

508mm (205x)

Near planetary nebula M3-6. Pretty blue and orange pair, close but well split.

★★

STF1254

6m4

10m4

20.8''

55°

2017

Cnc

08h40m22.11s

+19°40'11.90"

6m5

7m6

62.5''

343°

2018

6m5

9m2

83.5''

44°

2017

Stefan Loibl

Rosenheim (Germany)

102mm (164x)

septuple, visual quintuple, components A, B, C, and D split, E not visible, B not split, no colour contrast, at northern edge of Messier 44 (Praesepe)

BAL1852

11m0

14.3''

6°

2015

Hya

08h42m37.69s

+02°14'25.30"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Not likely to be physical. Wide, half delta mag white stars [not physical]

STF1258

7m7

7m9

10.0''

330°

2017

UMa

08h43m25.41s

+48°51'41.90"

Robert Zebahl

Leipzig (Germany)

70mm (22x)

Easy to separate at 22x, similarly bright components at moderate distance. At 57x very small difference in brightness noticeable. The components appeared slightly orange and white-bluish, with the color changing from one component to another. A very strange effect, which I observed several times.

BAL2821

12m6

13m1

10.0''

83°

2016

Hya

08h43m26.88s

+03°40'13.00"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

A bit faint pair, half delta mag, wide [not physical]

STF1270

6m9

7m5

4.7''

265°

2017

Hya

08h45m20.79s

-02°36'03.70"

Rene Merting Drachhausen (Germany)	100mm (64x)	bei 32x hatte ich schon den richtigen Verdacht, bei 64x ist es eindeutig, beide Sterne stehen knapp getrennt schön eng zusammen - Komponente A im Osten wirkt cremeweiß, B eher weißblau
Mark McCarthy Fremont (California/USA)	508mm (533x)	MX Hya. Wide, yellow-white, half delta mag. Nice

★

CBL32

7m4

10m7

41.0''

174°

2015

Cnc

08h46m14.32s

+27°35'41.30"

Mark McCarthy Fremont (California/USA)	317mm (553x)	Dull orange with fairly faint 10.5 mag B, wide separation
Mark McCarthy Fremont (California/USA)	317mm (553x)	Pretty yellow-orange 8th magnitude primary, with 3x fainter blue which can be seen direct vision but blinks like a planetary nebula, so must be 11-12th mag. Wide separation.

★★

STF1268, iota Cnc, 48 Cnc

4m1

6m0

30.7''

308°

2018

Cnc

08h46m41.82s

+28°45'35.60"

Robert Zebahl Leipzig (Germany)	70mm (22x)	Striking, widely separated with noticeable difference in brightness. Moderate but beautiful color contrast: white-yellowish and grey-bluish.
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
Sarah Gebauer Germany	150mm (125x)	bei 83x schon deutlich getrennt, der Farbkontrast ist gut zu sehen, er wird bei 125x noch stärker, ein zartes Blau und Gelb sind zu sehen
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.

★★★

11 Hya, epsilon Hya

SP1

3m5

5m0

0.2''

241°

2018

Hya

08h46m46.51s

+06°25'07.70"

STF1273

AB-C

3m5

6m7

2.9''

309°

2017

STF1273

AB-D

3m5

12m5

18.1''

201°

2017

STF1273

AB-E

3m5

10m8

340.5''

2°

2015

STF1273

AB-F

3m5

10m4

406.5''

265°

2015

Robert Zebahl Leipzig (Germany)	70mm (133x)	AB-C: Not split. Although a slight brightening was visible in the first diffraction ring, it could also have come from slight coma of the refractor.
Robert Zebahl Leipzig (Germany)	102mm (160x)	AB-C: 2020-03-27: The much fainter companion is well visible as an almost round knot directly at the diffraction ring of the primary component. Very nice sight. The seeing was mediocre (3/5).
Uwe Pilz Leipzig (Germany)	105mm (200x)	AB-C: bei 144x schwierig
Robert Zebahl Leipzig (Germany)	152mm (150x)	AB-C: 2020-03-27: The companion is immediately visible as a tiny star close to the primary component. Due to the chromatic aberration of the achromat, there is a slight tendency to outshine. Nevertheless a nice view. The seeing was mediocre (3/5).
Mark McCarthy Fremont (California/USA)	508mm (533x)	AB-C: Epsilon Hya A is bright orange-yellow, B is much fainter and a little blue, ~3". [SP 1 AB is 3.49/5.00 0.2" not seen]

STF1281

7m8

9m0

53.1''

310°

2017

Hya

08h47m36.90s

+00°01'04.30"

Rene Merting

Drachhausen (Germany)

100mm (20x)

bei 32x ein weit auseinander stehendes Paar - Komponente B im NW ist halb so hell und wirkt gräulich gegenüber der buttergelben Komponente A - zurück auf 20x ist B noch nicht zu schwach und immernoch gut getrennt von A erkennbar

BAL2347

9m3

10m8

4.0''

204°

2015

Hya

08h47m58.80s

+03°07'39.50"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

B star considerably fainter needed averted vision to flash it out, but then hold it direct. Both stars a little blue, wide separation, half delta mag

BU335

7m5

9m4

2.6''

265°

2017

Hya

08h48m12.24s

+02°34'48.40"

Uwe Pilz Leipzig (Germany)	105mm (200x)	schwierig
Mark McCarthy Fremont (California/USA)	508mm (333x)	Close, ~3", 2 delta mag.
Mark McCarthy Fremont (California/USA)	508mm (533x)	3 delta mag, well split ~3", very pleasing pair, white A and slightly red B

STT194

7m4

10m5

12.6''

57°

2015

Hya

08h48m18.30s

+00°33'18.10"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Orange A and blue B, 3 delta mag, very wide [not physical]

★

AGC3, rho Hya

4m4

11m9

12.1''

146°

2015

Hya

08h48m25.98s

+05°50'16.40"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Rho Hya Bright white A star and much fainter B star, but it's still a hard bluish point very fine. Nice one

★

A2550

9m5

9m8

0.4''

204°

1996

Hya

08h48m35.67s

+03°04'05.20"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Wow exceptionally fine pair. B is very faint but can hold direct vision after flashing it out using averted vision. Very close, hairline split, amazing pair. At 1067x the stars dim a little can still see B but need averted vision all the time

★

A2552

9m1

8m5

0.3''

208°

2018

Hya

08h48m40.30s

+00°56'31.00"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Wow fine split. Pale yellow A and blue B, about one delta mag. Nice split, amazing [82.4 year period]

J74

11m2

11m3

9.3''

126°

2017

Hya

08h50m23.22s

+01°24'47.20"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Faint near equal, bluish, pretty wide. Forms part of a triangle with similar magnitude stars [not physical]

BAL2351

9m3

10m6

14.2''

110°

2016

Hya

08h50m30.10s

+03°32'34.30"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Easy wide pair, B star is very blue. One delta mag. [not physical]

STF1282

7m6

7m8

3.5''

279°

2019

Lyn

08h50m44.28s

+35°04'15.40"

Robert Zebahl

Leipzig (Germany)

70mm (57x)

Clearly separated, but close together with very little difference in brightness. The double star forms an acute-angled triangle together with two other stars.

STF1275

8m7

8m9

1.9''

198°

2019

UMa

08h51m26.19s

+57°31'38.10"

Robert Zebahl

Leipzig (Germany)

70mm (100x)

At 100x and 150x not permanently split. Components very close together.

BAL2354

9m9

11m7

8.5''

40°

2015

Hya

08h51m27.36s

+02°55'49.80"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

B is quite faint, need averted vision to notice it, but then can hold direct, 3 delta mag, pretty wide, ~8" [not physical]

STF1290

7m4

9m2

2.8''

325°

2017

Hya

08h52m03.40s

+04°27'58.00"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

White stars, wide, 2 delta mag

A2900

6m4

9m5

0.7''

310°

2004

Hya

08h52m24.18s

+05°20'25.20"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Elongated or olive shape, not quite notched, certainly a double but difficult, in poor conditions

HJ460, 53 Cnc

6m5

11m7

43.7''

335°

2003

Cnc

08h52m28.60s

+28°15'33.00"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

53 Cnc: Orange primary and 2x fainter blue, wide separation (this is AB). There is a second orange-yellow star of about the same magnitude very wide separation (this is AC).

A2752

9m0

11m0

5.1''

231°

2016

Hya

08h53m26.66s

+05°12'47.20"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Easy wide pair, B is 1.5 delta mag and very blue

STF1292

9m3

9m5

6.1''

189°

2017

Hya

08h53m46.02s

-00°34'41.60"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Near equal, wide, ~6". Very faint star ~20" may be plus one [it is, UC 1728 AC, 9.32/13.42 27.8"]

STT195

7m7

8m3

9.8''

139°

2017

Cnc

08h53m57.80s

+08°25'17.70"

Robert Zebahl

Leipzig (Germany)

70mm (80x)

At 22x very nicely separated with a small difference in brightness. The components are still pretty tight. Altogether a rather dim double star. At 80x the color difference is well visible: primary component appears slightly orange, the companion pale blue.

★

STF1291, 57 Cnc

6m1

6m4

1.6''

309°

2019

Cnc

08h54m14.65s

+30°34'45.80"

AB-C

5m5

9m2

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
Sarah Gebauer Germany	150mm (125x)	AB: sowohl bei 83x als auch bei 125x knapp vorm Trennen
Mark McCarthy Fremont (California/USA)	203mm (205x)	AB: 57 Cnc. Very nice pair, strong orange yellow colors, ~1 delta mag, bright, nice close split

BAL1430

10m1

11m0

11.5''

110°

2015

Hya

08h54m37.08s

+01°27'00.30"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Faint, wide, noticeable not-quite-half magnitude difference [not physical]

STF1289

8m2

8m9

3.7''

7°

2019

Lyn

08h54m44.33s

+43°35'04.70"

Robert Zebahl

Leipzig (Germany)

70mm (57x)

Quite faint double star, but easy to separate with a noticeable difference in brightness and close components.

STF1280

8m8

9m1

3.4''

358°

2018

UMa

08h55m24.82s

+70°47'39.20"

Rene Merting

Drachhausen (Germany)

100mm (72x)

ein knapp getrenntes Sternpaar - beide Sterne sind annähernd gleich hell und strahlen rein weiß - bei 144x eine ordentlichere Trennung, Komponente A im Süden strahlt in einem wärmeren Weiß

ARG21, AC UMa

10m0

10m4

21.4''

106°

2015

UMa

08h55m51.01s

+64°58'21.60"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Two very faint stars, wide separation, ~0.5 delta mag, to south of an orange star.

STF1294 & SIN41

STF1294

9m0

10m8

15.6''

340°

2015

Cnc

08h57m17.08s

+32°53'57.90"

SIN41

9m0

12m6

191.3''

285°

2015

Robert Zebahl

Leipzig (Germany)

102mm (28x)

STF1294 (AB): At 28x relatively widely separated and rather less striking near the bright star sigma 2 Cnc. Component A appeared slightly orange, the companion only as a dim star. Similar view at 86x.

★★

BU408

7m3

9m6

2.8''

345°

2018

UMa

08h59m00.62s

+63°25'42.80"

Rene Merting Drachhausen (Germany)	100mm (142x)	bei 107x ist nordöstlich von A ein Helligkeitspeak erkennbar, aber nicht richtig greifbar - bei 142x dann zeigt sich in ruhigen Momenten die schwächere Komponente knapp abgesetzt von A - großer Helligkeitsunterschied, mindestens 2.5 Größenklassen
Mark McCarthy Fremont (California/USA)	317mm (553x)	BU 408 is the fainter star in a pair pair of near equal stars in finder view, red-orange color. In the scope the B is a blue star 3" out from the orange star.

HJ2477, iot UMa

A-BC

3m1

9m2

2.4''

90°

2017

UMa

08h59m12.45s

+48°02'30.60"

Mark McCarthy

Fremont (California/USA)

508mm (213x)

Iota UMa = Talitha. Using 25mm occulting bars with barlow, no mask, putting the bright star's diffraction spikes under the bars, I can see the hard point of the B star, brighter & closer than Procyon B outside of A's glare. One other field star. [HJ 2477's period is 2735 years. The short period is BC is HU 628 9.90/10.10 0.9" 39 year period -- how in the world did he see that?]

STF1296

9m1

9m9

1.9''

76°

2019

Lyn

08h59m16.74s

+34°56'46.90"

Robert Zebahl

Leipzig (Germany)

102mm (160x)

Overall quite faint double star, but clearly separated with a moderate difference in brightness. Both components are still pretty close together.

STF1302

9m3

9m5

2.7''

233°

2017

Hya

09h01m12.87s

+02°44'44.40"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Near equal easy pair, ~2.5"

★

STF1298, 66 Cnc

6m0

8m6

4.4''

137°

2017

Cnc

09h01m24.13s

+32°15'08.30"

6m0

12m0

187.6''

318°

2015

Robert Zebahl Leipzig (Germany)	70mm (80x)	AB: At 67x and 80x the companion is visible as a very faint star close to the main component. At 133x it is only visible as a slightly blurred tiny star just outside the first diffraction ring of the primary component.
Robert Zebahl Leipzig (Germany)	102mm (62x)	AB: At 62x clearly separated, significant difference in brightness. The companion can be seen well as a faint little star, apart from the primary component. At 125x easy to split. Component A appeared rather white.
Mark McCarthy Fremont (California/USA)	203mm (205x)	AB: 66 Cnc. Excellent pair. A is a pure white, B is much fainter and seems red to purple color, nicely separated

SHJ101, 67 Cnc

6m1

9m2

103.9''

329°

2015

Cnc

09h01m48.84s

+27°54'09.30"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

67 Cnc. White pair, 2 delta mag, wide.

★

A1585, kap UMa

4m2

4m5

0.3''

285°

2017

UMa

09h03m37.56s

+47°09'24.00"

Mark McCarthy

Fremont (California/USA)

508mm (1067x)

Kappa UMa = Talitha australis: With apodizing mask. Much glare but snowman seen steadily inside the mess. Looks like Eta Carina nebula, with a larger bulge toward us and the smaller bulge pointed up and away. No field stars at this magnification, went down to 533x to notice one for the sketch

STF1308

8m1

9m2

10.5''

85°

2016

Hya

09h04m59.50s

-03°59'15.10"

Rene Merting

Drachhausen (Germany)

100mm (32x)

bei 32x zeigt sich ein enges Sternpärchen, Komponente B im Osten ist eine knappe Größenklasse schwächer

AG161

10m1

10m6

4.3''

225°

2018

Cnc

09h05m39.99s

+32°26'35.80"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Very fine white pair, nicely split in the scene, near equal. [sadly it is not physical]

STF1309

8m5

8m4

11.7''

273°

2016

Hya

09h06m38.25s

+02°49'06.30"

Rene Merting

Drachhausen (Germany)

100mm (32x)

bei 32x ein Musterdoppelstern, wie er im Buche steht - zwei gleich helle Sterne eng aneinander geschmiegt, knapp getrennt - ganz leichter Farbkontrast, aber nicht definierbar

AG162

9m8

10m1

4.1''

107°

2018

Cnc

09h07m10.98s

+30°38'30.10"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Pretty, near equal off white stars, ~4" [not physical]

STF1311

6m9

7m1

7.8''

199°

2019

Cnc

09h07m27.01s

+22°58'51.10"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Milk white A and off-white, yellowish B, ~1 delta mag, well separated

POU3029

10m1

10m4

8.1''

315°

2018

Cnc

09h08m09.79s

+23°52'42.90"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Wide separation, white stars, about half delta mag

STTA97

8m3

51.5''

274°

2018

Cnc

09h08m27.16s

+27°32'35.30"

Mark McCarthy Fremont (California/USA)	80mm (13x)	Finder split, near equal white.
Mark McCarthy Fremont (California/USA)	317mm (553x)	80mm finder view shows an arc of three stars. westernmost star is a wide equal pair in the telescope.

WRH16, xi Cnc

5m7

6m2

0.2''

108°

1944

Cnc

09h09m21.53s

+22°02'43.60"

Frederik Wanink

Itterbeck (Germany)

254mm (640x)

nicht als DS gesehen

★★

STF1306, sigma 2 UMa, 13 UMa

4m9

8m8

4.3''

348°

2016

UMa

09h10m23.53s

+67°08'03.30"

4m9

10m3

197.8''

148°

2003

Robert Zebahl Leipzig (Germany)	70mm (100x)	AB: Companion almost permanently visible as elongated, non-condensed brightening of the first diffraction ring of the primary component at the correct position angle.
Uwe Pilz Leipzig (Germany)	105mm (144x)	AB: sehr schwierig bei 88x

STF1322

8m3

8m7

1.7''

53°

2017

Cnc

09h12m40.15s

+16°31'30.20"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Fine white pair, well split ~2", 1 delta mag

STF1315

7m3

7m7

24.9''

27°

2017

UMa

09h12m45.94s

+61°40'32.70"

Robert Zebahl Leipzig (Germany)	70mm (22x)	Medium bright double star, easy to separate with attractive distance and slight difference in brightness. Together with 16 UMa in one field of view. The brighter component appeared slightly orange, the fainter one showed a hint of blue. However, the colors of the components changed over time. At 57x similar view.
Rene Merting Drachhausen (Germany)	100mm (20x)	bei 32x gibt es nix zu meckern, ein bequem getrenntes Pärchen - Komponente B im NO ist maximal eine halbe Größenklasse schwächer - leichter Farbkontrast - noch schöner bei 20x, auffällig im Umfeld

BRT155

9m8

10m6

4.6''

270°

2018

Cnc

09h12m51.05s

+24°20'29.60"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Almost need averted vision to hold the B star but can manage it direct after a bit of effort. Pretty wide ~4", 2 delta mag. [Not physical. However A is Aa,Ab, 10.45/10.45 0.5", not seen.]

STF1320

9m5

10m5

12.0''

216°

2015

Lyn

09h13m21.20s

+42°19'45.90"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Easy, wide, yellow-white A and blueish B. [not physical]

AG163

10m2

10m7

5.1''

320°

2015

Cnc

09h13m34.97s

+24°03'25.30"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

A fine near equal wide pair, ~5", 10th mag. [surprisingly not physical]

STF1318

7m8

9m5

2.4''

228°

2018

UMa

09h13m38.79s

+46°59'25.30"

Robert Zebahl

Leipzig (Germany)

70mm (133x)

Separated with clear difference in brightness. The faint companion is slightly outside the first diffraction ring of the primary component.

TDS6428

10m4

10m5

0.4''

299°

1991

Lyn

09h15m38.21s

+39°42'50.40"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

B flashes with averted vision only, extremely close split

STF1332

7m9

8m1

5.9''

29°

2015

Cnc

09h17m19.21s

+23°39'09.80"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Near equal wide pair, ~5", maybe half delta mag

STF1336

7m0

11m1

40.1''

180°

2015

Hya

09h17m32.92s

+00°33'17.80"

Uwe Pilz

Leipzig (Germany)

105mm (144x)

sehr weit, kein Doppelstern-Eindruck

../projects/double-stars/uwe-pilz/sketches/200323STF1336.jpg

★

STF3121

7m9

8m0

0.5''

205°

2017

Cnc

09h17m53.45s

+28°33'37.70"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

IP Cnc Split at 533x, used 1067x to recheck orientation. With apodizing mask. Light yellow-orange stars, nice and clean split, very slight mag difference. Real nice

STF1333

6m6

6m7

1.9''

50°

2017

Lyn

09h18m25.97s

+35°21'51.30"

Robert Zebahl Leipzig (Germany)	63mm (120x)	At 93x seen as '8', at 120x split, but pretty tight with no visible difference in brightness.
Uwe Pilz Leipzig (Germany)	105mm (200x)	fast gleich hell, beide gelblich, bei 66x schwierig
Mark McCarthy Fremont (California/USA)	508mm (333x)	Brilliant white pair, near equal, ~2" separation

STF1334, 38 Lyn

3m9

6m1

2.5''

229°

2017

Lyn

09h18m50.64s

+36°48'09.30"

Uwe Pilz Leipzig (Germany)	60mm (198x)	Aufhellung im ersten Ring
Robert Zebahl Leipzig (Germany)	63mm (140x)	Fainter companion only seen as permanent brightening on the first diffraction ring.
Uwe Pilz Leipzig (Germany)	105mm (288x)	gelb, trennbar bei 66x
Mark McCarthy Fremont (California/USA)	317mm (553x)	38 Lyn: Very bright A with 3x fainter dull white B, 3-4"
Mark McCarthy Fremont (California/USA)	508mm (333x)	38 Lyn. A is a bright light yellow and B is a ~2 delta mag orange-yellow, well split and bright

STF1339

9m2

9m9

1.5''

65°

2017

Lyn

09h20m58.39s

+36°43'09.60"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Faint B but still easily seen, resolves nicely with seeing, almost 2 delta mag, ~1.5"

STF1338

6m7

7m1

1.1''

314°

2017

Lyn

09h20m59.40s

+38°11'17.90"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Wonderful light yellow stars, near equal, ~1" separation

ES1541

10m4

11m2

8.2''

23°

2015

Lyn

09h22m05.95s

+39°58'00.70"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

White and dull white pair, ~1 delta mag, wide ~8"

★★

STF1347

7m3

8m3

21.1''

312°

2016

Hya

09h23m15.76s

+03°30'05.00"

Rene Merting Drachhausen (Germany)	100mm (20x)	bei 32x ein auffälliges Sternpaar - Komponente B im Nordwesten ist gut abgesetzt erkennbar und ca. ein 3/4 Größenklasse schwächer - bei 20x rücken die beiden Sterne richtig schön zusammen und sind noch knapp getrennt erkennbar
Uwe Pilz Leipzig (Germany)	105mm (88x)	sehr schöner Farbkontrast

AG165

9m9

10m1

1.4''

16°

2017

Leo

09h23m19.01s

+22°10'45.30"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

A is white and hazy (in poor conditions) and B flashes into view with averted vision

STF1344

9m0

9m5

3.8''

104°

2018

LMi

09h23m28.35s

+39°08'05.10"

Robert Zebahl Leipzig (Germany)	120mm (75x)	At 50x and 75x split, but tight with little difference in brightness.
Mark McCarthy Fremont (California/USA)	317mm (553x)	Faint near equal par, ~5". Nice.

STT201

8m5

9m5

1.4''

206°

2017

Leo

09h23m54.50s

+27°54'00.00"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

Extremely fine split, with seeing only, finest of the night, significant mag difference, just above 1" separation

★★

STF1348

7m5

7m6

2.0''

314°

2018

Hya

09h24m28.48s

+06°21'01.80"

Uwe Pilz Leipzig (Germany)	105mm (144x)	Im selben Aufsuchfeld wie stf1355, ähnliche Erscheinung
Mark McCarthy Fremont (California/USA)	203mm (333x)	Very pretty half delta mag, ~2" pair, white. Sharp despite low declination

★

BU105, kappa Leo, 1 Leo

4m6

9m7

2.0''

209°

2015

Leo

09h24m39.28s

+26°10'56.80"

4m6

11m1

147.7''

212°

2015

Uwe Pilz Leipzig (Germany)	105mm (180x)	AB: Begleiter sitzt im ersten Ring
Mark McCarthy Fremont (California/USA)	317mm (553x)	AB: 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

6m5

8m6

1.3''

334°

2016

UMa

09h24m55.67s

+51°34'26.10"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Light orange A, B a deeper orange, maybe because it's 2-3x fainter. B resolves from within A's diffraction when seeing settles, ~1". Wow!

AG166

9m1

11m1

3.6''

74°

2018

Hya

09h26m45.80s

+01°04'57.40"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

B balrey seen with direct vision, brighted with averted vision. Pretty. ~1-2 delta mag, ~4"

A128

9m6

10m0

1.3''

262°

2017

Hya

09h26m52.30s

-03°14'42.00"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Fine pair, but need to wait for seeing for split. ~1" and half delta mag, white stars

★★

STF1355

7m7

7m8

1.8''

357°

2018

Hya

09h27m16.69s

+06°13'59.00"

Uwe Pilz Leipzig (Germany)	105mm (144x)	Im selben Aufsuchfeld wie stf1348, ähnliche Erscheinung
Mark McCarthy Fremont (California/USA)	203mm (333x)	Light yellow pair, near equal, very nice, ~2"

STF1353

9m9

10m0

3.3''

125°

2017

Leo

09h27m39.28s

+15°44'32.00"

Mark McCarthy Fremont (California/USA)	203mm (205x)	Faint & hazy in poor conditions; elongated haze split with seeing, near equal
Mark McCarthy Fremont (California/USA)	317mm (553x)	Well separated near equal 9th magnitude white stars, ~4"

TDS6583

10m8

10m9

0.5''

71°

1991

Lyn

09h28m23.15s

+39°54'56.70"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Just split with seeing, very tight, noticeable mag difference ~0.5-1, orange stars

STF1356, ome Leo

5m7

7m3

0.9''

114°

2018

Leo

09h28m27.41s

+09°03'24.40"

Mark McCarthy Fremont (California/USA)	203mm (205x)	Omega Leo. Elongated & notched, similar magnitude, yellow-orange stars
Mark McCarthy Fremont (California/USA)	317mm (553x)	Very close but clean split, in each other's diffraction, half delta mag, white.

H4 47, 3 Leo

5m8

11m1

25.2''

80°

2015

Leo

09h28m29.19s

+08°11'18.10"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Orange star with well separated white B, 2 delta mag.

41 Lyn, S598

5m5

7m8

69.7''

160°

2017

UMa

09h28m39.99s

+45°36'06.50"

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

Robert Zebahl

Leipzig (Germany)

8x40

Fairly well split with fainter component.

BAL2364

10m0

10m5

8.7''

140°

2015

Hya

09h29m16.38s

+03°05'44.00"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

A bit more than half delta mag, wide stars. B is faint, nearly needs averted vision

★

BU591

7m8

8m9

1.0''

29°

2017

Hya

09h29m36.43s

-03°07'20.40"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Very nice pair. Split with seeing, noticable mag difference, hairline only

STF1360

8m9

13.8''

242°

2017

Leo

09h30m35.95s

+10°36'06.40"

Mark McCarthy Fremont (California/USA)	203mm (205x)	GS Leo. Wide, light orange-yellow, near equal
Mark McCarthy Fremont (California/USA)	317mm (553x)	Unremarkable wide separation 8th mag stars.

★

STF1349

7m5

9m0

19.2''

166°

2015

UMa

09h31m09.89s

+67°32'28.40"

Christopher Hay Seeheim (Germany)	60mm (25x)	At 25x a wide split, substantial difference in brightness, B a fine pinprick of light. B appears light blue at first, but colour impression disappears quickly - an interesting visual effect repeated several times. According to Stelledoppie a true physical pair. Nice together with Struve 1350 in same FOV. A very fine double-double for very small apertures.
Rene Merting Drachhausen (Germany)	100mm (32x)	bei 32x stehen beide Sterne bequem getrennt auseinander - Komponente B im Süden ist eine knappe Größenklasse schwächer und kupfergrau - ein schönes Doppel-Doppel zusammen mit STF1350 gut 47' weiter südsüdöstlich
Uwe Pilz Leipzig (Germany)	105mm (88x)	sichtbar bei 21x
Rene Merting Drachhausen (Germany)	320mm (45x)	bei 45x steht das Pärchen gut auseinander - Komponente B ist eine dreiviertel Größenklasse schwächer und wirkt grauweiß - A ist weiß mit einem zarten Stich ins Gelbe

STF1365

7m4

8m0

3.5''

156°

2017

Hya

09h31m31.26s

+01°27'55.10"

Rene Merting Drachhausen (Germany)	100mm (64x)	bei 64x ist eine 8 erkennbar - in guten Momenten präsentieren sich beide Sterne knapp getrennt - Komponente B im SO ist eine halbe Größenklasse schwächer
Mark McCarthy Fremont (California/USA)	203mm (333x)	Wide off-yellow pair, ~4", ~1.5 delta mag

STF1351, 23 UMa

3m6

9m2

22.7''

267°

2015

UMa

09h31m31.57s

+63°03'42.50"

3m7

11m8

107.4''

232°

2015

Rene Merting Drachhausen (Germany)	100mm (32x)	AB: bei 32x ist A gleißend, B im Westen extrem schwacher Lichtpunkt, gut 4-5 Größenklassen schwächer - bei 64x kann ich A ein wenig gebändigt erkennen und hat einen leichten Stich ins Gelbliche, B ist ordentlich abgesetzt
Mark McCarthy Fremont (California/USA)	317mm (270x)	AB: 23 UMa. Lovely yellow-white and 3x fainter wide B, white.
Rene Merting Drachhausen (Germany)	320mm (45x)	AB: bei 45x ist Komponente B schwach sichtbar neben dem gelblich strahlenden 23 UMa - großer nicht abschätzbarer Helligkeitsunterschied

SHJ107, 6 Leo

5m2

9m3

37.1''

77°

2018

Leo

09h31m57.58s

+09°42'56.80"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

A star is light orange & 3 delta mag to B star which is a white, well separated point

STF1364

8m6

9m7

16.4''

155°

2015

Leo

09h32m01.52s

+20°02'49.30"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Unremarkable wide separation faint stars

HN 29

6m5

12m1

27.8''

263°

2015

Leo

09h33m18.32s

+28°22'04.90"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Very wide, very faint B star. Not very exciting.

★★

STF1350

8m3

10.2''

249°

2015

UMa

09h34m19.56s

+66°47'42.30"

8m3

9m2

131.0''

216°

2015

Christopher Hay Seeheim (Germany)	60mm (25x)	AB: Tight but nicely split at 25x. No colour whatsoever seen. A appears brighter than B, whereby the data do not support this – perhaps a product of different (yet not seen) colouration? According to Stelledoppie not a physical pair. Attractive together with Struve 1349 in same field of view.
Rene Merting Drachhausen (Germany)	100mm (32x)	AB: bei 32x ein schönes enges Paar zweier gleich heller Sterne, knapp getrennt - STF1350 AB bildet mit vier ähnlich hellen Sternen westlich ein Muster, ähnlich einer Sense AC: bei 32x bildet STF1350 AB mit vier ähnlich hellen Sternen westlich ein Muster, ähnlich einer Sense - der erste der vier Sterne bzw. der nächststehende Stern südsüdwestlich mit mehr als zehnfachem Abstand AB ist Komponente C, er ist schätzungsweise eine halbe Größenklasse schwächer
Uwe Pilz Leipzig (Germany)	105mm (88x)	AB: trennbar bei 21x. Fast gleichell, aber deutlicher Farbkontrast, lohnend.
Robert Zebahl Leipzig (Germany)	152mm (100x)	At 22x, all three components are already visible, with A & B still standing quite close together. Component C is less prominent. At 69x and 100x, the pair AB shows a nice color contrast: The eastern component mostly appeared in a slightly shiny orange, while the other component appeared more white-bluish. During the observation, however, the colors changed between both components. At the time of observation, the pretty bright comet C/2019 Y4 Atlas was also in the same field of view - a great scene! Note to the sketch: The positions of the stars to each other do not exactly match, also the alignment of the pair AB to C.
Rene Merting Drachhausen (Germany)	320mm (45x)	AB: bei 45x ein schönes enges Paar zweier gleich heller Sterne, beide strahlen weiß

STF1369, DI Lyn

7m0

8m0

25.0''

150°

2018

Lyn

09h35m22.50s

+39°57'47.70"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

DI Lyn Very wide and bright light yellow stars, ~1 delta mag. [did not notice COU 2084 Aa,Ab, 6.98/8.79 0.2"]

STF1371

7m9

10m2

8.2''

275°

2015

Hya

09h35m25.26s

+03°54'19.40"

Mark McCarthy

Fremont (California/USA)

203mm (333x)

Nice yellowish A, widely separated from nealry three delta mag B

HU1128, 11 LMi

4m8

12m5

6.7''

61°

2012

LMi

09h35m39.50s

+35°48'36.40"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

11 LMi: Very faint A & extremely faint B, wide separation. From the orbital chart this is approaching maximum elongation now (May 2017), by 2143 it will be 1". Only 39 light years away.

H5 58, 7 Leo

6m3

9m4

41.0''

90°

2014

Leo

09h35m52.88s

+14°22'46.50"

Mark McCarthy

Fremont (California/USA)

80mm (13x)

Finder split, wide, white, 2 delta mag.

ES428

9m3

11m2

13.2''

203°

2015

Leo

09h36m31.37s

+28°20'23.20"

Mark McCarthy

Fremont (California/USA)

203mm (205x)

B pops out with averted vision, widely separated. A is white, and I can barely hold b direct. At the end of an attractive curve of four stars of similar magnitude

STT204

6m7

10m7

8.3''

99°

2015

Leo

09h38m45.69s

+10°46'39.80"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Hard white A with B a haze, sharpened to point with averted vision. Well separated, 3 delta mag.

STF1374

7m3

8m7

2.8''

311°

2017

LMi

09h41m21.88s

+38°57'01.90"

Robert Zebahl Leipzig (Germany)	120mm (168x)	At 50x elongated, at 75x seen as '8'. At 168x clearly split with obviously fainter component.
Mark McCarthy Fremont (California/USA)	508mm (333x)	Pretty orange-yellow stars, ~2 delta mag, ~3 separation

STT206

8m3

11m4

17.9''

224°

2015

Leo

09h42m18.84s

+17°04'55.60"

Mark McCarthy Fremont (California/USA)	317mm (277x)	AB is the widely separated ~1 delta mag. star, about 40". There's fainter star popping out with averted vision in between them, which is the AD pair, 11th mag.
Mark McCarthy Fremont (California/USA)	317mm (277x)	AB is the widely separated ~1 delta mag. star, about 40". There's fainter star popping out with averted vision in between them, which is the AD pair, 11th mag.

STT205

8m0

12m6

12.0''

202°

2018

Lyn

09h42m29.17s

+40°58'25.20"

Mark McCarthy

Fremont (California/USA)

317mm (277x)

Yellow and orange pair ~1 delta mag.

ES301

9m8

11m8

5.0''

243°

2018

Lyn

09h42m42.81s

+40°17'30.90"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

B appears fine and clear with averted vision, blue color, and can then barely hold it with direct vision. Light yellow A. Very nice

A2761

9m0

9m2

1.0''

252°

2017

Sex

09h43m29.38s

+06°12'27.70"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

Attractive yellow-orange A and bluish B, well separated, about three delta mag

A2560

8m8

9m8

1.1''

18°

2017

Sex

09h50m02.86s

+01°47'37.20"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Challenging faint close companion suspected with 333x, but seen well with 533x. With seeing, light orange A and blue B, ~2 delta mag, ~1" separation

HO369

8m0

9m8

0.4''

99°

2011

LMi

09h51m09.34s

+36°29'20.80"

Mark McCarthy

Fremont (California/USA)

508mm (1067x)

With 533x I can tell this is not single, but the elongation is too tentative. At 1067x the best I can manage is elongated notched, with seeing. Seeing and transparency are not good enough

STT208, phi UMa

5m3

5m4

0.5''

304°

2017

UMa

09h52m06.36s

+54°03'51.40"

Uwe Pilz

Leipzig (Germany)

105mm (260x)

länglich, schwierig

A2139

8m0

10m7

2.0''

292°

2015

LMi

09h52m15.53s

+40°58'13.40"

Mark McCarthy

Fremont (California/USA)

508mm (333x)

White A and blue B, ~2" separation, >2 delta mag. [not physical]

AC5, gam Sex

5m4

6m4

0.5''

41°

2016

Sex

09h52m30.47s

-08°06'17.70"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Gamma Sex: I get a split with seeing of nearly equal orange yellow stars, only momentarily

★

STT209

7m4

10m3

4.9''

310°

2017

UMa

09h53m17.23s

+50°37'16.30"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Light orange-yellow disk with faint diffraction ring. Extremely faint blue B ~4" can see it direct vision but it flashes forth with averted.

★

S605, 9 Sex

6m9

8m4

53.5''

287°

2016

Sex

09h54m06.70s

+04°56'43.50"

Rene Merting

Drachhausen (Germany)

100mm (20x)

bei 32x ein weit auseinander stehendes Pärchen, das trotzdem schön anzusehen ist - Komponente B im Nordwesten ist gut 1.5 Magnituden schwächer - A samtgelb, B kupfergrau - zurück auf 20x sind beide Sterne auch noch komfortabel getrennt - die Farbe von A ist noch intensiver, jetzt eher rapsgelb

★

STF1399

7m7

8m4

30.2''

176°

2017

Leo

09h57m02.21s

+19°45'44.60"

Robert Zebahl Leipzig (Germany)	70mm (22x)	Easy to split with nice distance and obviously unequal. A conspicuous group of fainter stars is nearby. Main component appeared in a warm-white, fainter somehow darker (partly bluish, partly slightly orange).
Uwe Pilz Leipzig (Germany)	105mm (53x)	wie ein Schlangenbiß
Mark McCarthy Fremont (California/USA)	317mm (553x)	Faint pair, tough find dense with stars. 1 delta magnitude, wide separation.

Berthold Fuchs

Wiesbaden (Germany)

130mm

easy DS

../projects/double-stars/berthold-fuchs/photographs/STF%201399.png

STF1398

8m1

11m4

4.1''

102°

2017

UMa

10h01m32.06s

+68°43'05.10"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Near M81 & M82! Did not see the 11th mag, 3" B star, tried really hard. To the south is a tight = red pair.

★★

STT210

8m5

9m1

1.3''

257°

2016

UMa

10h02m35.64s

+46°21'42.50"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Yellow A and white B, very tight. Faint, seeing needs to be perfect to see B in the diffraction.

HU631

8m0

9m3

0.8''

258°

2017

LMi

10h03m59.08s

+32°38'48.80"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Bright orange-yellow A star, B is a very small, faint blue point, ~1" separation, very much fainter ~3 delta mag

TDS6998

11m1

11m4

0.8''

297°

1991

Leo

10h04m05.09s

+27°26'54.30"

Mark McCarthy

Fremont (California/USA)

508mm (533x)

Elongation flashing with averted vision, but its hazy, not clear

STF1406

8m4

9m4

0.7''

219°

2017

LMi

10h05m38.57s

+31°05'13.00"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Very tight, kissing when seeing stills, 1 delta mag. white

★★

A2142

8m0

8m8

1.1''

295°

2016

LMi

10h05m43.55s

+41°02'42.70"

Mark McCarthy

Fremont (California/USA)

317mm (553x)

Very fine, split, ~1-1.5". 8th magnitude and 1.5 delta mag B, close split, very nice p