Double Stars - R.A. 06h-12h

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

Double star lists:
Double/Multiple Stars 251
Visual Observations 348
Sketches 37
Photographs 8
Observers 7
Berthold Fuchs, Stefan Loibl, Mark McCarthy, Rene Merting, Uwe Pilz, Frederik Wanink, Robert Zebahl
m1 m2 ρ θ Year Coordinates (J2000)
SIN128 AC 7.3 7.6 2.6'' 193° 1985 Aur 06h01m14.73s +31°32'28.10"
Robert Zebahl
Leipzig (Germany)
70mm (133x) Even at high magnification there are no indications of a double star. Also the brightness seemed to be less than stated!?
BU16, 3 Mon 5.0 8.0 1.9'' 355° 1996 Mon 06h01m50.42s -10°35'52.60"
Uwe Pilz
Leipzig (Germany)
105mm (260x) schwache Aufhellung im ersten Ring ../projects/doublestars/uwe_pilz/sketches/3Mon.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) Begleiter schwach ../projects/doublestars/uwe_pilz/sketches/bu16.jpg
STF840 A-BC 7.2 8.9 21.4'' 248° 2014 Ori 06h06m28.04s +10°45'01.00"
Mark McCarthy
Fremont (California/USA)
317mm (170x) Wide blue-white and slightly red pair, 1 delta mag.
STF840 BC 9.8 10.1 0.4'' 126° 1997 Ori 06h06m28.04s +10°45'01.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) B maybe elongated? Not certain.
STT131 7.0 9.4 1.5'' 277° 2012 Aur 06h07m25.84s +36°16'28.70"
Mark McCarthy
Fremont (California/USA)
317mm (270x) Very close, need seeing to resolve 2 delta mag white A and light blue B
STT132 7.2 9.6 1.8'' 332° 2012 Aur 06h08m11.68s +37°58'57.90"
Mark McCarthy
Fremont (California/USA)
317mm (270x) White A and slightly red B. Fine pair. 2 delta mag.
BU17 AB 6.9 9.3 3.6'' 189° 2013 Mon 06h08m25.39s -11°08'46.60"
AC 6.9 10.8 10.2'' 260° 2015
BC 9.3 10.8 9.3'' 276° 1998
Uwe Pilz
Leipzig (Germany)
105mm (288x) Dreifachstern! (Burnham 17) ../projects/doublestars/uwe_pilz/sketches/bu17.jpg
STF848 AB 7.3 8.2 2.5'' 111° 2017 Ori 06h08m30.36s +13°58'15.80"
Robert Zebahl
Leipzig (Germany)
70mm (100x) Well split with obvious difference in brightness.
Mark McCarthy
Fremont (California/USA)
317mm (170x) Close bluish pair near the center of the open cluster NGC 2169
STF845, 41 Aur 6.2 6.9 7.5'' 358° 2017 Aur 06h11m36.59s +48°42'39.60"
Robert Zebahl
Leipzig (Germany)
55mm (25x) Relatively tight with visible difference in brightness.
STF877 7.5 8.0 5.7'' 264° 2015 Ori 06h14m42.67s +14°35'10.80"
Robert Zebahl
Leipzig (Germany)
70mm (44x) Well split, but close together. Little difference in brightness noticeable.
★★ BU1008, eta Gem, 7 Gem, Propus 3.5 6.2 1.8'' 258° 2017 Gem 06h14m52.69s +22°30'24.60"
Uwe Pilz
Leipzig (Germany)
105mm (260x) Aufhellung im ersten Ring
Uwe Pilz
Leipzig (Germany)
105mm (288x) sehr schwierig ../projects/doublestars/uwe_pilz/sketches/etaGem.jpg
Robert Zebahl
Leipzig (Germany)
152mm (225x) Already comparatively easy at 180x. The faint companion can be seen well as a quite distinct, slightly elongated, partly round brightening. At 225x and above it becomes easy and immediately apparent, even if the diffraction rings of the primary component are not permanently visible due to the seeing. The primary component was shining in a bright orange.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Propus (means "forefoot") = Eta Geminorum: So cool! Bright orange star with B very close, ~1.5", just preceding, ~3 delta mag. B is in diffraction but is well separated & has its own airy disk, bluish white.
STF872 AB 6.9 7.4 11.3'' 215° 2017 Aur 06h15m39.06s +36°08'55.30"
Robert Zebahl
Leipzig (Germany)
55mm (25x) Well separated with significant difference in brightness.
H5 55 7.0 10.8 62.1'' 59° 2015 Gem 06h19m22.52s +23°16'28.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 12 Geminorum: Very wide separation, ~3 delta mag, fairly faint.
STF3116, FR CMa AB 5.5 9.7 3.9'' 23° 2003 Mon 06h21m24.71s -11°46'23.60"
Uwe Pilz
Leipzig (Germany)
105mm (130x) schwach, knapp außerhalb des ersten Rings, kein Problem
Uwe Pilz
Leipzig (Germany)
105mm (137x) einfach
Uwe Pilz
Leipzig (Germany)
105mm (198x) oberhalb ß Cma
STF881, 4 Lyn AB 6.1 7.7 0.6'' 149° 2016 Lyn 06h22m03.57s +59°22'19.50"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) schwierig wegen Helligkeitsunterschied
STF899 7.4 8.0 2.2'' 18° 2018 Gem 06h22m49.64s +17°34'27.30"
Robert Zebahl
Leipzig (Germany)
70mm (133x) Separated, but tight with visible difference in brightness.
STF900, epsilon Mon, 8 Mon AB 4.4 6.6 12.0'' 29° 2017 Mon 06h23m46.10s +04°35'34.20"
Robert Zebahl
Leipzig (Germany)
55mm (42x) Relatively large distance and clear difference in brightness. The lighter component seemed white-yellowish, the weaker one slightly greenish-blue. The color contrast, however, was not particularly conspicuous.
Uwe Pilz
Leipzig (Germany)
105mm (288x) Blau-rot ../projects/doublestars/uwe_pilz/sketches/epsMon.jpg
SHJ70 AB 6.7 8.2 25.0'' 202° 2017 Gem 06h27m46.58s +20°47'22.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very pretty orange A, with a brown B, ~1.5 delta mag.
★★★ beta Mon, 11 Mon STF919 AB 4.6 5.0 7.1'' 133° 2017 Mon 06h28m49.07s -07°01'59.00"
STF919 AC 4.6 5.4 9.8'' 125° 2018
STF919 BC 5.0 5.3 2.6'' 108° 2018
BU570 AD 4.6 12.1 26.6'' 55° 2012
Uwe Pilz
Leipzig (Germany)
105mm (137x) Dreifachsystem, drei fast gleichhelle Sterne. Alle blau-weiß ../projects/doublestars/uwe_pilz/sketches/betaMon.jpg
STT143 AB 6.2 10.1 7.6'' 103° 2009 Gem 06h31m09.99s +16°56'19.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange A, very faint B, ~3", PA due east. 3rd to the north is FOX 147
FOX147 AC 6.2 11.4 47.3'' 346° 2015 Gem 06h31m09.99s +16°56'19.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 3rd star in STT 143, to the north, faint and widely separated
FAB5 Aa-Ab 7.2 9.6 0.9'' 18° 1991 Mon 06h31m40.54s +05°46'08.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Misshapen disk at best moments, very difficult
STF926 AB 7.2 8.6 10.8'' 287° 2017 Mon 06h31m40.54s +05°46'08.80"
Mark McCarthy
Fremont (California/USA)
317mm (170x) In a triangle of stars which points toward the Rosette Nebula. Blue-white A star and slightly red B, 1 delta mag, wide. The A star is FAB 5
★★ STF924 AB 6.3 6.9 20.7'' 212° 2017 Gem 06h32m18.52s +17°47'03.40"
BC 6.9 13.0 47.8'' 144° 2014
Robert Zebahl
Leipzig (Germany)
70mm (22x) AB: At 22x bright, immediately conspicuous, although in a relatively star-rich surrounding. Moderate but beautiful color contrast: bright orange, decent blue. Also at 44x very beautiful sight.
Robert Zebahl
Leipzig (Germany)
152mm (69x) AB: Easy, bright, moderately uneven. Nice contrast in color: slight orange, white-blueish.
STF918 AB 7.3 8.2 4.9'' 336° 2017 Aur 06h33m57.62s +52°27'41.80"
Robert Zebahl
Leipzig (Germany)
55mm (40x) At 40x tight, at 55x well split with obviously fainter companion.
STT147 AB 6.8 8.7 42.7'' 74° 2016 Aur 06h34m19.37s +38°04'33.60"
A-CD 6.8 9.8 44.5'' 119° 2016
CD 10.6 11.0 0.5'' 109° 1957
Robert Zebahl
Leipzig (Germany)
152mm (69x) At 22x, the components A, B and C are immediately conspicuous, where A dominates. They form a beautiful, acute-angled triangle. At 69x, color differences are also visible. A: subtle orange; B: gray-blueish; C: tendency to orange. Rewarding, because the double stars STF 928 & STF 929 as well as the very conspicuous carbon star UU Aur are in close proximity and can partly be observed together in one field of view!
STF932 8.3 8.5 1.6'' 305° 2017 Gem 06h34m21.57s +14°45'08.30"
Robert Zebahl
Leipzig (Germany)
70mm (150x) Unfortunately a nearby lamp bothered me. I could see the double star at least elongated.
STF928 AB 7.9 8.6 3.5'' 132° 2016 Aur 06h34m41.81s +38°32'24.50"
Robert Zebahl
Leipzig (Germany)
152mm (69x) Clearly separated, but tight. Moderate difference in brightness. Nice view with the nearby double stars STT147 & STF 929 and the carbon star UU Aur!
STF938, 14 Mon 6.5 10.6 11.0'' 211° 2012 Mon 06h34m46.33s +07°34'21.00"
Mark McCarthy
Fremont (California/USA)
317mm (170x) Bright A and very faint 4 delta mag B
STF929 7.3 8.4 6.5'' 24° 2016 Aur 06h35m22.03s +37°42'55.10"
Robert Zebahl
Leipzig (Germany)
152mm (69x) Easy to separate, clear difference in brightness, slight color contrast. Primary component showed a slight orange color, the color of the companion was not clearly defineable. Nice view with the nearby double stars STT147 & STF 928 and the carbon star UU Aur!
STF942 10.1 10.1 3.5'' 246° 2015 Gem 06h37m40.87s +23°38'54.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint near equal brightness, well split
STT152, 54 Aur 6.2 7.8 0.8'' 34° 2016 Aur 06h39m33.12s +28°15'47.40"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) schwierig, Luftunruhe ../projects/doublestars/frederik_wanink/sketches/STT152.jpg
STF950, S Mon AB 4.7 7.8 3.0'' 214° 2015 Mon 06h40m58.66s +09°53'44.70"
Mark McCarthy
Fremont (California/USA)
317mm (170x) This is the brightest star, forming the trunk, of the Christmas Tree cluster, NGC 2264. Bright white and wide 4 delta mag B star, well separated. Spent some time at 71x to look at the cluster as a whole.
AGC1, 9 CMa, alpha CMa, Sirius AB -1.5 8.4 10.7'' 75° 2016 CMa 06h45m08.92s -16°42'58.00"
Uwe Pilz
Leipzig (Germany)
105mm (198x) mit ADV, ohne nicht trennbar. Eindeutig
Mark McCarthy
Fremont (California/USA)
203mm (368x) Small disk formed on diffraction spike at correct separation and PA (Feb. 2016)
Mark McCarthy
Fremont (California/USA)
317mm (443x) A faint yellow-orange disk, to the edge of Sirius A’s diffraction and just below my spider’s diffraction spike. I let Sirius pass beyond the field stop, and for an instant there was Sirius B, clearly separated, before it too passed beyond the field stop.
STF957 AB 7.5 9.4 3.6'' 91° 2009 Gem 06h45m10.02s +30°49'33.50"
AC 7.5 13.8 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.
STT155 7.1 10.9 15.1'' 261° 2015 Gem 06h45m23.51s +24°40'20.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty orange star with 2x fainter B, also orange, due west, ~6"
★★★ STF948, 12 Lyn AB 5.4 6.0 1.9'' 66° 2018 Lyn 06h46m14.15s +59°26'30.10"
AC 5.4 7.0 8.8'' 310° 2018
Robert Zebahl
Leipzig (Germany)
55mm (27x) AC: Components A/B and C well separated, but tight. Significant difference in brightness. The fainter C companion appeared slightly orange, the brighter one white-bluish.
Robert Zebahl
Leipzig (Germany)
55mm (167x) AB: Components A and B separated, whereby the Airy disks slightly overlap. The difference in brightness was well visible. ../projects/doublestars/robert_zebahl/sketches/2019-01-21_stf948.jpg
Robert Zebahl
Leipzig (Germany)
63mm (140x) AB: Components A and B split with almost no space in between. The difference in brightness was visible. ../projects/doublestars/robert_zebahl/sketches/2019-01-22_stf948.jpg
Robert Zebahl
Leipzig (Germany)
70mm (22x) AC: Well split, relatively close together with significant difference in brightness.
Robert Zebahl
Leipzig (Germany)
70mm (133x) AB: Both components A + B clearly split, whereby the diffraction rings where merged together. A very nice view together with component C. I sketched this triplet, which reflects my impression well. Unfortunately, the distance and position angle are not particularly well observed. Also the difference in brightness I didn't noticed during my observation. ../projects/doublestars/robert_zebahl/sketches/2019-01-20_stf948.jpg
HWE15 8.9 10.3 13.2'' 218° 2015 CMa 06h46m35.21s -20°34'45.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange, a wide faint blue B star
STT157 7.2 9.2 0.6'' 163° 2016 Mon 06h47m47.56s +00°20'24.50"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Yellow A, widely separated from blue B. 2 magnitude difference. Did not notice 0.8" separation in A
STF958 AB 6.3 6.3 4.5'' 77° 2018 Lyn 06h48m12.29s +55°42'15.10"
Robert Zebahl
Leipzig (Germany)
70mm (33x) Clearly split, equally bright, close together. Nice view.
STF982, 38 Gem AB 4.8 7.8 7.4'' 143° 2018 Gem 06h54m38.63s +13°10'40.10"
Robert Zebahl
Leipzig (Germany)
55mm (27x) At 27x pretty tight with much fainter component. At 71x clearly separated with clear difference in brightness. Brighter component appeared slightly yellowish, the weaker one slightly bluish.
Robert Zebahl
Leipzig (Germany)
70mm (33x) Easy to separated with noticeable difference in brightness. The fainter component appeared slightly orange, the brighter one rather white.
Uwe Pilz
Leipzig (Germany)
105mm (130x) recht attraktiv
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty yellow and orange, 2 delta mag, wide separation
Mark McCarthy
Fremont (California/USA)
371mm (553x) Bright orange and slightly red star, 2-3 delta mag.
STF981 8.7 9.0 0.9'' 119° 2016 Gem 06h55m28.54s +30°09'42.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very close orange pair, equal magnitude. Clean split, ~1".
STF991 AB 8.0 9.2 3.8'' 164° 2015 Gem 06h57m01.26s +24°57'27.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White and orange, 2 delta mag, ~5", PA to S.
STT159, 15 Lyn AB 4.5 5.5 0.7'' 236° 2017 Lyn 06h57m16.60s +58°25'23.00"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) relativ einfach ../projects/doublestars/frederik_wanink/sketches/15Lyn.jpg
STTA80 AB 7.2 7.4 124.1'' 53° 2015 Gem 06h58m06.59s +14°13'43.40"
AC 7.2 8.4 81.2'' 112° 2015
Robert Zebahl
Leipzig (Germany)
70mm (22x) All 3 components form a striking triangle and are slightly different in color. A (western component): white-blueish; B (northern component): white-yellowish; C (southern component): orange, partly slightly reddish. ../projects/doublestars/robert_zebahl/sketches/2019-12-18_stta80.jpg
CPO7, eps CMa 1.5 7.5 7.9'' 162° 2008 CMa 06h58m37.55s -28°58'19.50"
Mark McCarthy
Fremont (California/USA)
203mm (113x) Adhara, epsilon Canis Majoris: Wow! Bright (+1.5 magnitude) and large A with small and much fainter close B (magnitude +7.5) to the south. Lovely double
STF994 AB 7.9 8.1 26.4'' 55° 2017 Aur 06h59m27.19s +37°05'53.50"
Robert Zebahl
Leipzig (Germany)
55mm (25x) Well separated, large distance, slight difference in brightness.
STF1007 AB 7.4 11.4 14.6'' 300° 2015 Gem 07h00m37.12s +12°43'24.20"
AC 7.4 10.0 21.9'' 244° 2015
AD 7.4 7.7 67.7'' 28° 2016
Robert Zebahl
Leipzig (Germany)
70mm (22x) AD: Wide separation, small difference in brightness. Slight difference in color, but difficult to describe. Component A at least seemed rather white. South of STF1007 there is also the double star HJ3288 and the star HD52976, which appears in a bright orange. Together in one field of view a beautiful sight. ../projects/doublestars/robert_zebahl/sketches/2019-12-18_stf1007_hj3288.jpg
★★ BU100 7.3 11.1 3.2'' 261° 1978 Gem 07h00m56.55s +12°24'00.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty orange and blue. 4 delta mag, PA to west. Wide separation ~3" B is just seen, a very fine point.
STT163 AB 7.2 8.2 0.2'' 99° 1997 Mon 07h01m09.85s +11°46'28.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Not perfectly round AB, a faint bluish haze in the diffraction to the south. Marginal.
BU573 7.2 7.8 0.9'' 308° 2016 Mon 07h01m49.89s -10°52'56.30"
Uwe Pilz
Leipzig (Germany)
105mm (247x) schwach gekerbt ../projects/doublestars/uwe_pilz/sketches/bu573.jpg
HJ3288 7.3 8.7 38.5'' 247° 2015 Gem 07h02m18.43s +12°34'54.20"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Easy to separate with moderate angular distance and a significant difference in brightness. Slight difference in color: white-yellowish, slightly orange. Nice view together with the double star STF1007 and HD52976, which appears in a bright orange. Sketched together with STF1007.
HO342 8.0 8.7 1.2'' 89° 2016 Gem 07h02m50.54s +13°05'21.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow-orange and blue stars, PA to the east, 1 delta mag, tight but well split ~1".
Mark McCarthy
Fremont (California/USA)
371mm (553x) Split when seeing stills. orange A and yellowing B, 1.5-2”
STF1009 AB 6.9 7.0 4.4'' 149° 2018 Lyn 07h05m39.83s +52°45'31.30"
Robert Zebahl
Leipzig (Germany)
70mm (33x) Very nice view. Equally bright components, tight.
★★ STF1014 9.9 9.9 2.0'' 221° 2017 Gem 07h05m44.95s +26°08'25.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint near equal brightness pair, ~3", PS to the SW.
ENG28 AB 7.9 7.7 171.9'' 99° 2015 Gem 07h08m00.24s +15°31'42.90"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Pretty, wide equal finder split, white, nice field.
STTA83/HO519 HO519 AB 7.2 13.0 32.5'' 73° 2015 Gem 07h09m35.47s +25°43'44.70"
STTA83 AC 7.2 7.8 123.3'' 79° 2015
Robert Zebahl
Leipzig (Germany)
70mm (22x) STTA83 (AC): Wide pair, relatively bright, moderate difference in brightness. A: slightly orange; C: gray-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 6.9 8.5 13.6'' 238° 2017 CMa 07h11m20.93s -21°48'11.80"
Uwe Pilz
Leipzig (Germany)
105mm (180x) schwach
WEI14 7.8 8.9 2.1'' 160° 2012 Gem 07h12m48.16s +15°10'41.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) A yellow-orange, blue B, 1 delta mag, PA to south. Nice!
STF1037 AB 7.2 7.3 0.8'' 304° 2018 Gem 07h12m49.08s +27°13'30.20"
Uwe Pilz
Leipzig (Germany)
105mm (260x) eingekerbt ../projects/doublestars/uwe_pilz/sketches/stf1037.jpg
Frederik Wanink
Itterbeck (Germany)
254mm (640x) leichter, gleich hell ../projects/doublestars/frederik_wanink/sketches/STF1037.jpg
STT167 AB 7.4 10.9 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.
STF1056 8.0 8.9 3.9'' 299° 2017 Mon 07h15m34.34s -01°51'36.80"
Mark McCarthy
Fremont (California/USA)
317mm (170x) Wide reddish pair.
★★ HJ3945 AB 5.0 5.8 26.8'' 50° 2015 CMa 07h16m36.84s -23°18'56.10"
Uwe Pilz
Leipzig (Germany)
105mm (37x) soforrt auffallend, blau-orange ../projects/doublestars/uwe_pilz/sketches/hj3945.jpg
Robert Zebahl
Leipzig (Germany)
120mm (23x) Evident, easy to split at large angular distance. Brighter component appeared very orange, fainter one bluish.
STF1068 AB 9.3 9.8 4.2'' 349° 2017 Gem 07h19m49.31s +13°22'22.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pumpkin orange pair, near equal magnitude, PA to north. Well separated ~4". Nice.
STF1050 AB 8.1 8.8 19.3'' 21° 2017 Lyn 07h19m51.29s +54°55'18.40"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Rather faint, obviously split with visible difference in brightness. View similar to STF 1062.
STF1066, delta Gem, 55 Gem 3.5 8.2 5.5'' 230° 2016 Gem 07h20m07.39s +21°58'56.40"
Robert Zebahl
Leipzig (Germany)
55mm (71x) Large difference in brightness. The fainter component was well separated, but just a very tiny star.
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".
STF1070 AB 8.7 9.3 1.7'' 324° 2015 Gem 07h21m21.87s +34°01'36.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty close, 1.5", white, 1 delta mag, PA to NW.
STF1065, 20 Lyn 7.5 7.7 14.9'' 256° 2017 Lyn 07h22m15.11s +50°08'55.70"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Nicely split, moderate distance, similarly bright.
STF1062, 19 Lyn AB 5.8 6.7 14.8'' 316° 2018 Lyn 07h22m52.06s +55°16'53.30"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Clearly separated, moderate distance, noticeable difference in brightness. The colors seemed different, but not exactly definable.
STF1083 7.3 8.1 6.7'' 45° 2015 Gem 07h25m35.30s +20°29'42.60"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Unequal pair. At 22x very tight, at 44x well split. Fainter companion appeared slightly orange, brighter one white-bluish.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Equal wide, white.
Mark McCarthy
Fremont (California/USA)
317mm (553x) White, equal brightness, PA to NE.
HO346 AB 7.0 11.7 13.2'' 59° 2015 Gem 07h25m54.13s +18°08'51.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and much fainter blue B, ~10” 3 delta mag. Nice!
STF1090 AC 7.3 9.5 49.9'' 79° 2015 Gem 07h26m27.33s +18°31'00.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty finder split, equal white. Is a 2+1 with 2x fainter BC.
STF1090 BC 8.2 9.5 20.9'' 328° 2015 Gem 07h26m31.56s +18°30'52.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Is a 2+1 with AC, C is 2 delta mag than fainter B.
STF1094 7.6 8.5 2.7'' 100° 2014 Gem 07h27m25.99s +15°18'59.00"
Robert Zebahl
Leipzig (Germany)
70mm (57x) At 57x barely split with noticeable difference in brightness. At 100x well split, but still tight.
S548 AC 7.0 8.9 35.1'' 277° 2015 Gem 07h27m40.54s +22°08'29.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange with a 2x fainter white star, PA slightly SW. AB is 12th mag and not seen
STF1103 7.1 8.6 3.9'' 247° 2015 CMi 07h30m33.61s +05°15'16.80"
Uwe Pilz
Leipzig (Germany)
105mm (137x) einfach, unscheinbar
Mark McCarthy
Fremont (California/USA)
317mm (170x) Pretty blue-white and orange-red stars, close but split.
STF1108 6.6 8.2 11.7'' 179° 2017 Gem 07h32m50.63s +22°53'15.40"
Uwe Pilz
Leipzig (Germany)
105mm (130x) einfach
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange stars, 2 delta mag, PA to south, ~8"
STF1116 7.8 8.5 1.8'' 97° 2015 Gem 07h34m32.02s +12°18'16.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty tight white, near equal magnitude, 2-3", PA to east. Nice pair.
★★★ STF1110, alpha Gem, 66 Gem, Castor AB 1.9 3.0 5.1'' 54° 2017 Gem 07h34m35.86s +31°53'17.80"
AC 1.9 9.8 69.8'' 163° 2017
AD 1.9 10.1 179.8'' 221° 2017
Robert Zebahl
Leipzig (Germany)
55mm (27x) AB: At 27x slight difference in brightness visible. Double star appeared as '8'. At 38x clearly split, but tight.
Robert Zebahl
Leipzig (Germany)
70mm (44x) AB: At 44x the double star appeared as an '8'. At 100x clearly split with noticeable difference in brightness. Both components appeared white.
Uwe Pilz
Leipzig (Germany)
105mm (144x) AB: blauweiß-weiß ../projects/doublestars/uwe_pilz/sketches/Castor.jpg
STT174 6.6 8.3 1.9'' 92° 2017 Lyn 07h35m56.00s +43°01'51.40"
Robert Zebahl
Leipzig (Germany)
70mm (133x) The obviously fainter component could be permanently seen in the right position angle as brightening on the first diffraction ring.
★★ STF1126 AB 6.5 7.0 0.9'' 176° 2017 CMi 07h40m06.99s +05°13'51.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wow, very close <1" hair-split, near equal brightness
STT179, kappa Gem, 77 Gem 3.7 10.0 7.2'' 241° 2014 Gem 07h44m26.87s +24°23'53.30"
Robert Zebahl
Leipzig (Germany)
70mm (133x) Observation at nearly full moon: Fainter companion was not visible.
Robert Zebahl
Leipzig (Germany)
120mm (200x) Although the optics were not yet completely cooled down, the fainter component could be seen slightly outside the first diffraction ring as a tiny star in moments of steady air.
A674 8.2 9.8 1.1'' 125° 2008 Gem 07h44m38.11s +31°06'50.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very close and faint, just split
STF1107 8.7 10.1 1.2'' 213° 1991 Cam 07h45m14.87s +75°47'51.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide separation, 1 delta mag, PA to NW.
STF1140 7.0 8.7 6.4'' 273° 2015 Gem 07h48m22.61s +18°20'12.40"
Robert Zebahl
Leipzig (Germany)
70mm (44x) Easy to separate with quite clear difference in brightness.
STF1147 9.7 9.7 2.2'' 177° 2018 Gem 07h50m19.69s +24°31'55.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very fine 2", equal magnitude blue-white pair, PA to south, ~2".
STTA89 6.8 7.7 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.
STT182 7.8 7.9 0.9'' 2017 CMi 07h52m42.12s +03°23'02.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Moderately bright A with 4 much fainter wide and close stars, forms a right triangle.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very close, ~1", near equal brightness white.
STF1162 8.0 10.2 9.0'' 327° 2015 Cnc 07h57m22.66s +13°12'24.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and blue, pretty wide.
STF1167 9.8 11.8 12.2'' 229° 2015 Cnc 07h58m34.29s +16°28'09.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint pair, B seen with averted vision and seeing. 2 delta mag, near a bright star.
STF1170 8.7 9.1 2.4'' 108° 2017 Cnc 07h59m45.52s +13°41'19.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Close near equal pair, 2".
STF1171 6.5 9.9 2.0'' 326° 2015 Cnc 08h01m00.78s +23°34'59.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and orange, 4 delta mag! very faint and close B
STF1173 AB 8.5 9.9 10.4'' 51° 2015 Cnc 08h01m23.12s +16°56'58.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide, pretty faint
HO349 AB 7.7 12.0 10.3'' 227° 2015 Cnc 08h02m32.77s +12°27'08.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Light orange star and extremely faint B star, a fuzz at the edge of visibility in the correct position angle, ~10" separation
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide separation, 3 delta mag, faint B.
STT186 7.7 7.9 1.0'' 73° 2017 Cnc 08h03m18.52s +26°16'03.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Close, 1" but easy split, near equal dull white color.
BU581 AB 8.5 8.8 0.4'' 220° 2017 Cnc 08h04m23.10s +12°17'23.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Light orange near equal, very small, elongated to notched.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange A is not quite round. Marginal
STF1182 7.5 8.8 4.8'' 73° 2017 CMi 08h05m24.43s +05°49'38.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White and reddish, 1 delta mag, PA due east.
STF1181 8.3 9.3 5.2'' 142° 2017 Cnc 08h05m24.56s +08°11'58.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and blue, 3 delta mag, wide separation.
STF1177, 17 Cnc 6.7 7.4 3.5'' 349° 2017 Cnc 08h05m37.06s +27°31'46.90"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt ../projects/doublestars/frederik_wanink/sketches/STF1177.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellowish, 1 delta mag, ~4"
STF1186 7.1 10.1 3.4'' 219° 2007 Cnc 08h08m49.61s +27°28'49.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 11 Cnc: Orange with very faint B, ~3"
STF1188 8.7 9.3 16.5'' 201° 2017 Cnc 08h09m23.95s +30°20'49.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide separation, near equal white.
STF1187 AB 7.2 8.0 3.1'' 19° 2017 Cnc 08h09m30.45s +32°13'18.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and orange, 1 delta mag, 5"
BUP111 AB 6.6 9.3 80.9'' 49° 2016 Cnc 08h10m13.10s +25°50'40.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 13 Cnc. Wide separation, orange A.
STF1191 10.3 10.8 3.6'' 77° 2015 Cnc 08h10m47.59s +19°01'51.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint but well split, ~3", near equal pair
HJ777 AB 9.6 11.7 10.6'' 349° 2016 Cnc 08h11m29.33s +10°41'05.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very wide, faint
★★★ STF1196, zeta Cnc, 16 Cnc AB-C 4.9 5.8 5.8'' 66° 2017 Cnc 08h12m12.79s +17°38'51.20"
AB 5.3 6.2 1.0'' 2017
Robert Zebahl
Leipzig (Germany)
102mm (86x) AB-C: Easy to separate. A: light gray, B: pale orange.
Stefan Loibl
Rosenheim (Germany)
102mm (164x) AB-C clearly split, AB obviously elongated but not split
Uwe Pilz
Leipzig (Germany)
105mm (288x) weißblau-gelb-gelb ../projects/doublestars/uwe_pilz/sketches/zetaCnc.jpg
Robert Zebahl
Leipzig (Germany)
120mm (67x) AB-C: Evident difference in brightness, easy to split. Both components of similar color.
Robert Zebahl
Leipzig (Germany)
120mm (200x) AB: Very tight. The Airy disks were still touching. Slight difference in brightness. Extremely beautiful triple star! ../projects/doublestars/robert_zebahl/sketches/2019-02-24_stf1196.jpg
Frederik Wanink
Itterbeck (Germany)
254mm (200x) AB-C: AB (1,1") nicht bemerkt ../projects/doublestars/frederik_wanink/sketches/STF1196.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: 2+1 system, the +1 star is HUT 1. STF 1196AB make a nice tight pair. They are all nearly the same magnitude, white & brilliant
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Triple, all near equal magnitude, yellow-white. AB ~0.8", hair split.
★★ STF1196, zet Cnc AC 5.3 5.8 6.2'' 62° 2018 Cnc 08h12m12.79s +17°38'51.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Triple, all near equal magnitude, yellow-white. AC ~6", wide split.
HUT1, zet Cnc Ca-Cb 6.2 7.1 0.3'' 96° 2016 Cnc 08h12m13.27s +17°38'51.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) not quite round, oval/olive shaped. It is the AB-C of STF 1196.
STF1197 9.0 9.7 1.8'' 100° 2017 Cnc 08h12m44.45s +29°32'30.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint pair, 1 delta mag, ~2".
STF1201 8.1 9.5 6.7'' 185° 2015 Cnc 08h12m52.51s +09°34'40.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty wide, 5", 1 delta mag.
STF1202 7.4 9.6 2.7'' 305° 2015 Cnc 08h13m34.20s +10°50'49.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice yellow-orange and 3 delta mag, B, same color, ~5-7"
H6 78 AC 6.4 10.9 63.3'' 300° 2015 Cnc 08h14m11.14s +17°40'33.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) very wide, bright white, 3 delta mag.
LEP30 7.7 9.8 31.8'' 238° 2015 Cnc 08h15m33.20s +11°25'51.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Light orange with faint white star of ~11th magnitude, wide separation
STF1210 AB 7.2 9.4 15.5'' 113° 2015 Hya 08h15m48.54s +02°48'05.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty wide greenish yellow pair, wide separation, 2 delta mag.
STF1223, phi 2 Cnc 6.2 6.2 5.2'' 219° 2018 Cnc 08h26m47.08s +26°56'07.80"
Uwe Pilz
Leipzig (Germany)
105mm (88x) sehr schön, blauweiß-gelbweiß ../projects/doublestars/uwe_pilz/sketches/stf1223.jpg
STN61 8.4 9.4 4.6'' 203° 2015 Pyx 08h40m17.61s -32°09'54.90"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Near planetary nebula M3-6. Pretty blue and orange pair, close but well split.
★★ STF1254 AB 6.4 10.4 20.8'' 55° 2017 Cnc 08h40m22.11s +19°40'11.90"
AC 6.5 7.6 64.0'' 343° 2017
AD 6.5 9.2 83.5'' 44° 2017
Stefan Loibl
Rosenheim (Germany)
102mm (164x) septuple, visual quintuple, components A, B, C, and D split, E not visible, B not split, no colour contrast, at northern edge of Messier 44 (Praesepe)
STF1258 7.7 7.9 10.0'' 330° 2017 UMa 08h43m25.41s +48°51'41.90"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Easy to separate at 22x, similarly bright components at moderate distance. At 57x very small difference in brightness noticeable. The components appeared slightly orange and white-blueish, with the color changing from one component to another. A very strange effect, which I observed several times.
CBL32 7.4 10.7 41.0'' 174° 2015 Cnc 08h46m14.32s +27°35'41.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Dull orange with fairly faint 10.5 mag B, wide separation
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty yellow-orange 8th magnitude primary, with 3x fainter blue which can be seen direct vision but blinks like a planetary nebula, so must be 11-12th mag. Wide separation.
★★ STF1268, iota Cnc, 48 Cnc 4.1 6.0 31.3'' 308° 2016 Cnc 08h46m41.82s +28°45'35.60"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Striking, widely separated with noticeable difference in brightness. Moderate but beautiful color contrast: white-yellowish and gray-blueish.
Robert Zebahl
Leipzig (Germany)
102mm (28x) Grand sight! Pretty wide apart and unequal. A: decent orange, B: very nice light blue.
Stefan Loibl
Rosenheim (Germany)
102mm (164x) wide pair with nice colour contrast yellow/blue
Uwe Pilz
Leipzig (Germany)
105mm (144x) gelb-blaugrau ../projects/doublestars/uwe_pilz/sketches/iotaCnc.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) 80mm finder split, beautiful yellow and blue. Scope view real nice. Very good diffraction and airy disks.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Iot Cnc: Pretty orange and pale blue, showpiece object.
BU335 7.5 9.4 2.6'' 265° 2017 Hya 08h48m12.24s +02°34'48.40"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Close, ~3", 2 delta mag.
STF1282 AB 7.6 7.8 3.5'' 280° 2018 Lyn 08h50m44.28s +35°04'15.40"
Robert Zebahl
Leipzig (Germany)
70mm (57x) Clearly separated, but close together with very little difference in brightness. The double star forms an acute-angled triangle together with two other stars.
STF1275 AB 8.7 8.9 1.9'' 198° 2015 UMa 08h51m26.19s +57°31'38.10"
Robert Zebahl
Leipzig (Germany)
70mm (100x) At 100x and 150x not permanently split. Components very close together.
HJ460, 53 Cnc AB 6.5 11.7 43.7'' 335° 2003 Cnc 08h52m28.60s +28°15'33.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 53 Cnc: Orange primary and 2x fainter blue, wide separation (this is AB). There is a second orange-yellow star of about the same magnitude very wide separation (this is AC).
STF1291, 57 Cnc AB 6.1 6.4 1.5'' 310° 2017 Cnc 08h54m14.65s +30°34'45.80"
AB-C 5.5 9.2 54.6'' 204° 2015
Robert Zebahl
Leipzig (Germany)
70mm (133x) AB: Immediately apparent as a double star. Diffraction disks overlapping slightly ('8'). Difference in brightness visible.
Uwe Pilz
Leipzig (Germany)
105mm (144x) gelb ../projects/doublestars/uwe_pilz/sketches/57Cnc.jpg
STF1289 8.2 8.9 3.6'' 2018 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.
ARG21, AC UMa 10.0 10.4 21.4'' 107° 2015 UMa 08h55m51.01s +64°58'21.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Two very faint stars, wide separation, ~0.5 delta mag, to south of an orange star.
★★ BU408 7.3 9.6 2.8'' 346° 2017 UMa 08h59m00.62s +63°25'42.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) BU 408 is the fainter star in a pair pair of near equal stars in finder view, red-orange color. In the scope the B is a blue star 3" out from the orange star.
STF1298, 66 Cnc AB 6.0 8.6 4.4'' 137° 2017 Cnc 09h01m24.13s +32°15'08.30"
AC 6.0 12.0 187.6'' 318° 2015
Robert Zebahl
Leipzig (Germany)
70mm (80x) AB: At 67x and 80x the companion is visible as a very faint star close to the main component. At 133x it is only visible as a slightly blurred tiny star just outside the first diffraction ring of the primary component.
SHJ101, 67 Cnc 6.1 9.2 103.9'' 329° 2015 Cnc 09h01m48.84s +27°54'09.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 67 Cnc. White pair, 2 delta mag, wide.
STTA97 8.3 8.3 51.8'' 238° 2015 Cnc 09h08m27.16s +27°32'35.30"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Finder split, near equal white.
Mark McCarthy
Fremont (California/USA)
317mm (553x) 80mm finder view shows an arc of three stars. westernmost star is a wide equal pair in the telescope.
WRH16, xi Cnc 5.7 6.2 0.2'' 108° 1944 Cnc 09h09m21.53s +22°02'43.60"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) nicht als DS gesehen
STF1306, sigma 2 UMa, 13 UMa AB 4.9 8.8 4.3'' 348° 2016 UMa 09h10m23.53s +67°08'03.30"
AC 4.9 10.3 197.8'' 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.
STF1315 7.3 7.7 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.
STF1318 7.8 9.5 2.6'' 228° 2017 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.
STF1333 6.6 6.7 1.9'' 50° 2017 Lyn 09h18m25.97s +35°21'51.30"
Robert Zebahl
Leipzig (Germany)
63mm (120x) At 93x seen as '8', at 120x split, but pretty tight with no visible difference in brightness.
Uwe Pilz
Leipzig (Germany)
105mm (200x) fast gleich hell, beide gelblich, bei 66x schwierig ../projects/doublestars/uwe_pilz/sketches/stf1333.jpg
STF1334, 38 Lyn AB 3.9 6.1 2.5'' 229° 2017 Lyn 09h18m50.64s +36°48'09.30"
Uwe Pilz
Leipzig (Germany)
60mm (198x) Aufhellung im ersten Ring
Robert Zebahl
Leipzig (Germany)
63mm (140x) Fainter companion only seen as permanent brightening on the first diffraction ring. ../projects/doublestars/robert_zebahl/sketches/2019-01-22_stf1334.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) gelb, trennbar bei 66x ../projects/doublestars/uwe_pilz/sketches/38Lyn.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) 38 Lyn: Very bright A with 3x fainter dull white B, 3-4"
STF1344 9.0 9.5 3.8'' 104° 2018 LMi 09h23m28.35s +39°08'05.10"
Robert Zebahl
Leipzig (Germany)
120mm (75x) At 50x and 75x split, but tight with little difference in brightness.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint near equal par, ~5". Nice.
BU105, kappa Leo, 1 Leo AB 4.6 9.7 2.0'' 209° 2015 Leo 09h24m39.28s +26°10'56.80"
AB 4.6 9.7 2.0'' 209° 2015
Uwe Pilz
Leipzig (Germany)
105mm (180x) Begleiter sitzt im ersten Ring
BU105, kap Leo AB 4.6 9.7 2.0'' 209° 2015 Leo 09h24m39.28s +26°10'56.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Kappa Leonis: Very tough but palpable split. Seeing needed to settle to perfection for primary to resolve to just an airy disk without diffraction or flaring, and for a couple of seconds could see the much fainter ~10th magnitude B star as a pin-point, ~2" separation. Fleeting view.
★★ STT200 6.5 8.6 1.2'' 337° 2007 UMa 09h24m55.67s +51°34'26.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Light orange A, B a deeper orange, maybe because it's 2-3x fainter. B resolves from within A's diffraction when seeing settles, ~1". Wow!
STF1353 9.9 10.0 3.3'' 125° 2017 Leo 09h27m39.28s +15°44'32.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Well separated near equal 9th magnitude white stars, ~4"
STF1356, ome Leo 5.7 7.3 0.9'' 112° 2017 Leo 09h28m27.41s +09°03'24.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very close but clean split, in each other's diffraction, half delta mag, white.
H4 47, 3 Leo 5.8 11.1 24.8'' 80° 2014 Leo 09h28m29.19s +08°11'18.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange star with well separated white B, 2 delta mag.
41 Lyn, S598 AB 5.5 7.8 69.7'' 160° 2017 UMa 09h28m39.99s +45°36'06.50"
This star has the designation 41 Lyn but is assigned to UMa. At the time, when Flamsteed numbered the stars, the constellation boundaries were not exactly defined. Another example is 10 UMa, which is located in Lyn today.
Robert Zebahl
Leipzig (Germany)
8x40 Fairly well split with fainter component.
STF1360 AB 8.9 8.9 13.8'' 242° 2017 Leo 09h30m35.95s +10°36'06.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Unremarkable wide separation 8th mag stars.
STF1351, 23 UMa AB 3.6 9.2 22.9'' 268° 2015 UMa 09h31m31.57s +63°03'42.50"
AC 3.7 11.8 105.2'' 232° 2003
Mark McCarthy
Fremont (California/USA)
317mm (270x) AB: 23 UMa. Lovely yellow-white and 3x fainter wide B, white.
SHJ107, 6 Leo 5.2 9.3 37.1'' 75° 2014 Leo 09h31m57.58s +09°42'56.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) A star is light orange & 3 delta mag to B star which is a white, well separated point
STF1364 AB 8.6 9.7 16.4'' 155° 2015 Leo 09h32m01.52s +20°02'49.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Unremarkable wide separation faint stars
HN 29 6.5 12.1 27.8'' 263° 2015 Leo 09h33m18.32s +28°22'04.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very wide, very faint B star. Not very exciting.
HU1128, 11 LMi 4.8 12.5 6.7'' 61° 2012 LMi 09h35m39.50s +35°48'36.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 11 LMi: Very faint A & extremely faint B, wide separation. From the orbital chart this is approaching maximum elongation now (May 2017), by 2143 it will be 1". Only 39 light years away.
H5 58, 7 Leo 6.3 9.4 41.0'' 90° 2014 Leo 09h35m52.88s +14°22'46.50"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Finder split, wide, white, 2 delta mag.
STT204 AB 6.7 10.7 8.2'' 99° 2015 Leo 09h38m45.69s +10°46'39.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Hard white A with B a haze, sharpened to point with averted vision. Well separated, 3 delta mag.
STF1374 AB 7.3 8.7 2.8'' 311° 2017 LMi 09h41m21.88s +38°57'01.90"
Robert Zebahl
Leipzig (Germany)
120mm (168x) At 50x elongated, at 75x seen as '8'. At 168x clearly split with obviously fainter component.
STT206 8.3 11.4 17.9'' 224° 2015 Leo 09h42m18.84s +17°04'55.60"
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB is the widely separated ~1 delta mag. star, about 40". There's fainter star popping out with averted vision in between them, which is the AD pair, 11th mag.
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB is the widely separated ~1 delta mag. star, about 40". There's fainter star popping out with averted vision in between them, which is the AD pair, 11th mag.
STT205 8.0 12.6 11.9'' 202° 2015 Lyn 09h42m29.17s +40°58'25.20"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Yellow and orange pair ~1 delta mag.
STT208, phi UMa 5.3 5.4 0.5'' 304° 2017 UMa 09h52m06.36s +54°03'51.40"
Uwe Pilz
Leipzig (Germany)
105mm (260x) länglich, schwierig
STT209 7.4 10.3 4.9'' 310° 2017 UMa 09h53m17.23s +50°37'16.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Light orange-yellow disk with faint diffraction ring. Extremely faint blue B ~4" can see it direct vision but it flashes forth with averted.
STF1399 7.7 8.4 30.2'' 176° 2017 Leo 09h57m02.21s +19°45'44.60"
Robert Zebahl
Leipzig (Germany)
70mm (22x) Easy to split with nice distance and obviously unequal. A conspicuous group of fainter stars is nearby. Main component appeared in a warm-white, fainter somehow darker (partly bluish, partly slightly orange).
Uwe Pilz
Leipzig (Germany)
105mm (53x) wie ein Schlangenbiß
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint pair, tough find dense with stars. 1 delta magnitude, wide separation.
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1399.png
STF1398 8.1 11.4 3.1'' 103° 2015 UMa 10h01m32.06s +68°43'05.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near M81 & M82! Did not see the 11th mag, 3" B star, tried really hard. To the south is a tight = red pair.
★★ STT210 8.5 9.1 1.2'' 256° 2015 UMa 10h02m35.64s +46°21'42.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow A and white B, very tight. Faint, seeing needs to be perfect to see B in the diffraction.
STF1406 8.4 9.4 0.7'' 219° 2017 LMi 10h05m38.57s +31°05'13.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very tight, kissing when seeing stills, 1 delta mag. white
★★ A2142 8.0 8.8 1.0'' 296° 2015 LMi 10h05m43.55s +41°02'42.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very fine, split, ~1-1.5". 8th magnitude and 1.5 delta mag B, close split, very nice pair. In the 80mm finder this is one of a triangle of equal magnitude stars.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very tight but clear split, ~1", 1 delta mag. A slightly green, B a little orange.
STF1405 7.3 11.8 22.0'' 252° 2015 LMi 10h05m55.92s +39°34'55.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 8th and 10th magnitudes. B is blurry with direct vision and flashes with averted. Wide split. A is white with a little yellow.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow-white A, fairly faint blue B wide separation.
alpha Leo, 32 Leo, Regulus STFB6 AB 1.4 8.2 175.5'' 308° 2016 Leo 10h08m22.31s +11°58'01.90"
HDO127 AD 1.4 12.1 195.3'' 274° 2015
HDO127 BC 8.2 13.2 2.1'' 95° 2015
Uwe Pilz
Leipzig (Germany)
105mm (288x) AB: sehr weit; einfach
STF1407 10.2 10.6 4.9'' 51° 2018 UMa 10h09m01.98s +64°26'40.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal faint 10th-11th mag white stars, 4"
STF1413 9.8 9.8 1.8'' 271° 2017 Leo 10h12m18.72s +16°20'54.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very close ~2", very faint equal pair.
STT213 AB 8.6 9.8 1.1'' 121° 2017 Leo 10h13m08.88s +27°25'10.50"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Bright yellow A, ~2 magnitudes fainter B, very wide separation.
STF1417 9.2 9.3 2.4'' 77° 2017 Leo 10h15m08.60s +19°07'27.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint, close, but well split pair, 3", B resolves better with averted vision.
STT215 7.2 7.5 1.5'' 176° 2018 Leo 10h16m16.05s +17°44'24.60"
Robert Zebahl
Leipzig (Germany)
70mm (133x) Appeared partly separated, partly as '8'. Brightness seemed to be equal.
Uwe Pilz
Leipzig (Germany)
105mm (288x) trennbar bei 120x
Mark McCarthy
Fremont (California/USA)
317mm (277x) very close split (1.7" separation) near equal bright white stars
SHY552 7.4 8.8 107.2'' 2015 LMi 10h16m38.13s +41°16'33.00"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Pair of stars in a perfect triangle of widely separated stars looking like Leo's rump. ~8th, 8.5, and 9th mag.
BVD81 5.8 10.0 79.6'' 28° 2015 Leo 10h16m41.83s +25°22'14.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very wide 2-3 delta mag yellow-orange & whitish-yellow.
STF1419 8.9 9.9 4.4'' 224° 2016 Leo 10h17m02.94s +10°06'51.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint pair, 1 delta mag, PA west ~4-5"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1419.png
STT523, 39 Leo 5.8 11.3 7.9'' 300° 2017 Leo 10h17m14.53s +23°06'22.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Unremarkable star with wide, very faint B
STF1421 8.2 9.1 4.6'' 330° 2017 Leo 10h18m05.54s +27°31'27.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Not difficult, 1 delta mag, 5" or so. Bluish.
Berthold Fuchs
Wiesbaden (Germany)
130mm difficult DS ../projects/doublestars/berthold_fuchs/photographs/STF 1421.png
STF1420 9.1 10.6 2.2'' 318° 2015 LMi 10h18m33.30s +39°06'37.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint orange and 2 delta mag B ~2".
STF1423 9.4 10.1 0.7'' 311° 2017 Leo 10h19m10.64s +20°33'48.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Tough! Elongated to hairline split.
★★ STF1424, gamma Leo, 41 Leo, Algieba AB 2.4 3.6 4.7'' 127° 2017 Leo 10h19m58.35s +19°50'29.40"
Robert Zebahl
Leipzig (Germany)
55mm (38x) At 38x split, but very tight with noticeable difference in brightness. At 56x and higher beautiful view of both components, which seemed to have similar colors. ../projects/doublestars/robert_zebahl/sketches/2019-02-09_gamma_leo.jpg
Robert Zebahl
Leipzig (Germany)
55mm (59x) Very nice unequal double. A appeared yellow-orange, B rather white-bluish. ../projects/doublestars/robert_zebahl/sketches/2019-03-09_gamma_leo.jpg
Stefan Loibl
Rosenheim (Germany)
102mm (164x) very bright double star, slight colour contrast
Uwe Pilz
Leipzig (Germany)
105mm (120x) schon bei 37x sehenswert; trennbar bei 55x; orange-blauweiß
Robert Zebahl
Leipzig (Germany)
120mm (66x) At 48x easily seen as double star. It appeared as '8'. At 66x pretty tight with visible difference in brightness.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Algieba: Bright yellow and yellow-orange pair, 1 delta mag, 4-6"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright yellow and yellow-white, 1 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very bright yellow, 1 delta mag wide.
STF1426 AB-C 7.3 9.4 7.6'' 2018 Leo 10h20m32.32s +06°25'47.60"
AB 8.0 8.3 0.9'' 313° 2017
Robert Zebahl
Leipzig (Germany)
102mm (160x) AB-C: Quite large angular distance and therefor easy to separate. The C component was pretty faint.
Robert Zebahl
Leipzig (Germany)
102mm (160x) AB: At first glance elongated, on closer look visible as '8'.
Stefan Loibl
Rosenheim (Germany)
102mm (164x) AB-C easily split, A-B not detectable as double
Uwe Pilz
Leipzig (Germany)
105mm (288x) A-B länglich, C weit
STF1425 9.9 10.7 4.8'' 358° 2017 UMa 10h21m34.14s +46°09'07.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint pair, ~4-5" orange and blue, 0.5 delta mag.
STF1427 8.2 8.5 9.3'' 215° 2018 UMa 10h22m00.53s +43°54'19.30"
Mark McCarthy
Fremont (California/USA)
317mm (277x) 8th magnitude orange star and a very wide 1 delta mag B.
★★ STT216 7.4 10.3 2.2'' 230° 2016 Leo 10h22m43.81s +15°20'39.70"
Mark McCarthy
Fremont (California/USA)
317mm (277x) A white and bright (7.3), B red & much fainter (10.3), a close split (2").
STF1429 9.1 9.3 0.8'' 155° 2017 Leo 10h25m01.79s +24°36'44.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very tough. Faint, need averted vision to brighten and sharpen. Elongated to clean split in the best moments with seeing, near equal magnitude
STF1431 7.8 9.1 3.6'' 74° 2017 Leo 10h25m35.12s +08°46'35.40"
Robert Zebahl
Leipzig (Germany)
70mm (67x) Separable at 67x, but very close together with a clear difference in brightness. Easy to separate at 100x. Next to it the star 44 Leo shines in a striking, bright orange.
Uwe Pilz
Leipzig (Germany)
105mm (88x) nahe 44 Leo
HJ832, 45 Leo 6.0 12.4 34.3'' 121° 2012 Leo 10h27m38.99s +09°45'44.70"
Uwe Pilz
Leipzig (Germany)
105mm (260x) nicht schwierig
ES1905 AB 8.6 12.6 41.6'' 68° 2015 UMa 10h30m16.09s +63°20'55.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White with 3x fainter, 11th mag, B. Very wide.
HJ482, 33 LMi 5.9 11.8 57.7'' 247° 2014 LMi 10h31m51.36s +32°22'46.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 33 LMi. Very bright A, with widely separated, very faint B.
STF1442 8.2 8.5 13.3'' 157° 2017 Leo 10h31m58.95s +22°02'22.00"
Berthold Fuchs
Wiesbaden (Germany)
130mm difficult DS ../projects/doublestars/berthold_fuchs/photographs/STF 1442.png
STF1443 9.9 10.0 5.3'' 161° 2018 LMi 10h33m17.07s +37°40'25.00"
Robert Zebahl
Leipzig (Germany)
120mm (50x) At 50x split with little distance. At 75x clearly split with small difference in brightness.
Mark McCarthy
Fremont (California/USA)
317mm (553x) White, near equal, 3-4"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1443.png
STF1446 9.3 10.0 5.6'' 250° 2017 Leo 10h33m33.32s +15°12'49.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Two faint stars, pretty well separated, 1 delta mag.
STF1447 7.5 8.9 4.5'' 124° 2017 Leo 10h33m47.28s +23°21'02.40"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Faint white and red-orange, PA to the east, pretty wide 6". Nice pair.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Both white, A (7.5) 2x brighter than B (8.9). Wide separation (4").
STF1448 AC 7.5 9.6 10.9'' 259° 2011 Leo 10h34m23.24s +21°35'36.40"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Pretty orange and blue pair, 2 delta mag, ~10"
Mark McCarthy
Fremont (California/USA)
317mm (277x) An orange and blue pair. Fainter than Alberio but just as pretty.
STF1450, 49 Leo 5.8 7.9 2.2'' 156° 2017 Leo 10h35m02.16s +08°39'01.60"
Robert Zebahl
Leipzig (Germany)
70mm (133x) B component appeared as clear brightening on the first diffraction ring of the primary component in the correct position angle.
Uwe Pilz
Leipzig (Germany)
105mm (200x) Begleiter klebt am ersten Ring
Mark McCarthy
Fremont (California/USA)
317mm (277x) White and slight yellow, ~6-7", nice pair.
STF1454 9.0 11.0 1.3'' 353° 2010 LMi 10h38m11.10s +26°36'24.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Quite tough: averted vision only, very tight, similar magnitude, when seeing stills.
STT222 7.0 11.7 4.0'' 339° 2015 UMa 10h38m19.89s +60°07'30.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Extremely faint star, B seen with averted vision, PA to north.
STF1459 8.3 8.8 5.4'' 152° 2017 LMi 10h40m12.46s +38°24'11.40"
Robert Zebahl
Leipzig (Germany)
120mm (50x) Clearly split with noticeable difference in brightness.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty yellow-orange, 0.5 delta mag, 5-6".
STT227 8.3 8.8 0.9'' 2017 Leo 10h41m41.58s +10°44'22.30"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Faint reddish pair, near equal, just split but hazy, poor view.
A2768 6.9 8.4 0.6'' 242° 2017 Sex 10h42m37.53s +03°34'58.90"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Feels like a not round disk, but uncertain.
BU913, 40 LMi AB 5.5 12.6 22.5'' 109° 2001 LMi 10h43m01.95s +26°19'32.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 40 LMi: Bright A, very faint B, very wide separation. B looks like a ghost.
STF1465 9.8 10.1 2.2'' 10° 2015 UMa 10h43m13.35s +44°37'41.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal well split ~3". 9th-10th mag.
STF1466, 35 Sex AB 6.2 7.1 6.7'' 239° 2017 Sex 10h43m20.91s +04°44'51.60"
Robert Zebahl
Leipzig (Germany)
102mm (28x) Very nice view. At 28x obviously unequal and easy to split. A appeared slightly orange. At 86x B appeared gray-blue. ../projects/doublestars/robert_zebahl/sketches/2019-04-06_35_sex.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) Orange and a little blue, wide separation, bright, half a delta mag.
SMA75 AB 5.2 7.3 288.0'' 88° 2018 UMa 10h43m32.89s +46°12'13.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide 80mm finder pair, white and slight yellow. In the scope there are some more faint stars about, so it is likely a small cluster -- 7 stars in the system.
STF1468 9.7 9.7 4.3'' 334° 2017 Leo 10h44m39.96s +20°42'18.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint near equal, close but a nice split
STF1467 8.6 10.8 4.0'' 291° 2015 UMa 10h45m15.60s +44°58'11.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange star with extremely faint wide split B. Needed averted vision to notice it as a smudge but could see it with direct vision as a small blue point when seeing stills. ~2 delta mag.
S612, 42 LMi AB 5.3 7.8 196.2'' 174° 2015 LMi 10h45m51.91s +30°40'56.60"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Very widely separated, split in finder (196"!). white A with a slightly red B
Mark McCarthy
Fremont (California/USA)
317mm (553x) 42 LMi: Very bright white and 3 delta mag orange B, very wide separation.
STF1469 AB 7.7 10.4 10.9'' 324° 2015 UMa 10h47m43.86s +65°27'36.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White and 2x fainter B, wide.
★★ STT229 7.6 7.9 0.7'' 256° 2017 UMa 10h48m02.55s +41°06'35.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Just wider than a thin hair split of equal white stars, ~8th mag. 0.63"! in 40 years it will be 0.2"
STF1476, 40 Sex 7.1 7.8 2.4'' 17° 2017 Sex 10h49m17.31s -04°01'23.80"
Mark McCarthy
Fremont (California/USA)
317mm (340x) Tight white of equal brightness
S617 6.2 8.7 35.2'' 179° 2017 Leo 10h53m24.96s -02°15'18.80"
Mark McCarthy
Fremont (California/USA)
317mm (340x) Yellow A, blue B, wide separation
STF1483 9.5 9.6 2.4'' 243° 2017 UMa 10h54m30.84s +47°29'35.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Two near equal wide split, fairly faint, 9.5 mag.
SKF59 7.4 11.5 34.1'' 59° 2015 LMi 10h54m44.78s +36°45'31.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange-yellow star with very wide separated very faint B, need averted vision.
STF1487, 54 Leo 4.5 6.3 6.6'' 113° 2017 Leo 10h55m36.80s +24°44'59.00"
Robert Zebahl
Leipzig (Germany)
55mm (27x) At 27x split, but very tight with noticeable difference in brightness. At 71x easy to separate. No visible color difference.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Bright white pair (4.5, 6.3) wide sep (6")
STF1492 8.0 10.2 21.6'' 165° 2017 LMi 10h57m35.85s +30°39'09.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 3 delta mag white with widely separated B
STF1491 AB 8.4 11.3 14.1'' 33° 2017 UMa 10h58m50.42s +61°42'56.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and blue, pretty wide, ~3 delta mag.
UC2059 AB 7.5 10.7 45.3'' 46° 2014 UMa 11h01m45.73s +36°40'41.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty well separated, 1.5 delta mag, not remarkable as I hoped given the odd designation.
COU1422 Ba-Bb 11.2 11.5 0.6'' 38° 2008 UMa 11h01m48.52s +36°41'14.60"
Mark McCarthy
Fremont (California/USA)
762mm (1219x) Cou 1422 is a pair of 11th magnitude stars very close to UC 2059 -- best I could get of Cou 1422 was an elongation with the seeing. Tried 1219x without improving the elongation.
STF1504 7.9 8.1 1.2'' 123° 2017 Leo 11h03m58.93s +03°38'19.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White near equal, ~2", nice.
HZG8, 51 UMa AC 6.0 7.6 150.1'' 83° 2017 UMa 11h04m31.28s +38°14'28.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very wide separation 1.5" mag. This is AC of 51 UMa, AB is Ho 377 which is 6.04,11.60 and 8.2"
★★ HO378 AB 8.2 9.1 1.1'' 237° 2017 UMa 11h04m57.29s +38°24'38.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) In a pretty cluster in the finder (~ 12 stars loose and poor, wide magnitude range, triangle shape). Pair is a fine split 1 delta mag 1", ice blue A and slightly yellow B.
★★ BU599, 65 Leo 5.7 9.7 2.8'' 106° 2015 Leo 11h06m54.20s +01°57'19.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright light orange star. As seeing resolves it to a disk and eliminates the diffraction, a tiny, faint star appears, planet-like, (~3") from the star. Only at the best moments, visibility of B star helped by averted vision.
STF1512 9.3 9.5 9.9'' 51° 2015 UMa 11h09m13.09s +62°29'51.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty, near equal bluish-white stars
STF1514 9.5 10.6 1.3'' 341° 2015 UMa 11h11m38.55s +66°06'48.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Extremely fine! It is at the base of a kite asterism, the fainter star of four. The three arcing the top of the kite are equal magnitude. STF 1514 is a very tight 1.5" but clean split, 1 delta mag. Nice!
ENG45 AB 7.2 8.3 135.0'' 247° 2016 UMa 11h11m48.95s +42°49'55.60"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Finder split, white, 0.5 delta mag.
HO50 6.5 8.4 3.0'' 35° 2017 UMa 11h13m40.09s +41°05'19.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Good disk of A star with momentary perfection, but cannot see B, I think the magnitue in WDS is overstated.
Mark McCarthy
Fremont (California/USA)
762mm (457x) The pair split immediately at 457x. A little diffraction but no doubt a small blue point just outside the first ring. Using the 8-inch aperture mask (effectively 8-inch f/18!) had a nice star image of A but B disappeared -- it became an averted vision, threshold object. Barlow here was no help to show it better. I think Ho 50B is fainter than the current data, and if the older data say it should be fainter, then it may well be variable. However, later in the night, I estimated Ho 50B to be as bright as STF 1964D, which is 9.02
STF1517 AB 7.5 8.0 0.7'' 314° 2017 Leo 11h13m40.99s +20°07'43.30"
Mark McCarthy
Fremont (California/USA)
317mm (340x) Very tight, hair split small orange stars of equal magnitude. Wow!
STF1521 7.7 8.1 3.7'' 98° 2017 Leo 11h15m20.95s +27°34'15.60"
Berthold Fuchs
Wiesbaden (Germany)
130mm close DS ../projects/doublestars/berthold_fuchs/photographs/STF 1521.png
★★ STF1519 9.0 9.9 1.5'' 289° 2017 UMa 11h15m36.65s +59°46'43.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 1 delta mag, tight 1.5" faint yellow stars.
★★ STF1523, xi UMa, 53 UMa, Alula Australis AB 4.3 4.8 1.9'' 166° 2017 UMa 11h18m10.90s +31°31'45.00"
Robert Zebahl
Leipzig (Germany)
55mm (83x) 2019-02-09: Already seen as '8' at 83x. At 125x the overlapping of both Airy disks was visible, but also a slight difference in brightness. ../projects/doublestars/robert_zebahl/sketches/2019-02-09_xi_uma.jpg
Robert Zebahl
Leipzig (Germany)
70mm (100x) 2018-02-18: Very close together with similar brightness. At first glance seen as an '8', looking closer I partly split both components. Similar view also at 128x.
Uwe Pilz
Leipzig (Germany)
105mm (288x) Gemessen: 162°
Robert Zebahl
Leipzig (Germany)
120mm (168x) 2018-02-14: Well split with slight difference in brightness.
Robert Zebahl
Leipzig (Germany)
152mm (129x) 2019-02-06: Well split with visible difference in brightness. The colors of both components appeared equal.
STF1524, nu UMa, 54 UMa, Alula Borealis AB 3.6 10.1 7.8'' 145° 2015 UMa 11h18m28.74s +33°05'39.50"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Tight white near equal pair.
STT233 AB 7.2 10.2 4.7'' 335° 2015 UMa 11h18m46.75s +66°41'03.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White with 3-4x fainter B, well separated. ~10th mag. Seeing needs to still.
STF1525 9.9 9.9 2.3'' 173° 2017 UMa 11h19m29.37s +47°28'12.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal faint, 9th-10th mag, 3".
STF1536, iot Leo AB 4.1 6.7 2.1'' 97° 2017 Leo 11h23m55.37s +10°31'46.90"
Mark McCarthy
Fremont (California/USA)
317mm (340x) Quite close, very bright yellow white A and brownish B, split in A's diffraction ring.
HJ4433, 81 Leo AB 5.6 10.8 55.2'' 2014 Leo 11h25m36.37s +16°27'23.50"
Mark McCarthy
Fremont (California/USA)
317mm (170x) bright orange-yellow A with a much fainter blue B, widely separated, a beautiful sight.
Mark McCarthy
Fremont (California/USA)
317mm (340x) 81 Leonis: Bright yellowish A, very faint bluish B, wide separation
★★ STF1540, 83 Leo AB 6.5 7.5 28.1'' 149° 2017 Leo 11h26m45.32s +03°00'47.20"
Stefan Loibl
Rosenheim (Germany)
10x50 clearly split, little difference in magnitude
Robert Zebahl
Leipzig (Germany)
55mm (16x) Wonderful double with slight color contrast in a very nice field. Together with tau Leo stunning view. Slightly unequal. A appeared white-yellowish, B rather gray-bluish. ../projects/doublestars/robert_zebahl/sketches/2019-03-09_83_leo_tau_leo.jpg
Mark McCarthy
Fremont (California/USA)
80mm (13x) Finder split, in same field as Tau.
Mark McCarthy
Fremont (California/USA)
317mm (340x) Yellow A and reddish B wide separation.
STF1541 8.0 10.1 7.8'' 27° 2015 UMa 11h27m39.46s +46°17'33.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty yellow-white and slight blue, 1-1.5 delta mag, wide ~4".
★★ STFA19, 84 Leo, tau Leo AB 5.0 7.5 88.5'' 182° 2018 Leo 11h27m56.23s +02°51'22.50"
Robert Zebahl
Leipzig (Germany)
55mm (16x) Wonderful double with slight color contrast in a very nice field. Together with 83 Leo stunning view. Noticeable unequal. A appeared white-yellowish with a hint of orange, B gray-bluish. ../projects/doublestars/robert_zebahl/sketches/2019-03-09_83_leo_tau_leo.jpg
Mark McCarthy
Fremont (California/USA)
80mm (13x) Finder split, the A star is prismatic in color effects, bluish B
Mark McCarthy
Fremont (California/USA)
317mm (340x) Bright yellow A, bluish B, very widely separated
STF1539 8.5 9.8 19.4'' 313° 2015 Cam 11h30m18.10s +81°02'14.30"
Rene Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein ganz feiner Doppelstern, ordentliche Trennung - Komponente A ist grau-weiß und die gut eine Größenklasse schwächere Komponente B … hm strahlt erstmal farblos, je länge ich drauf schaue, desto mehr rot-bräunlicher wird der Eindruck
STF1547, 88 Leo AB 6.3 9.1 15.6'' 332° 2017 Leo 11h31m44.94s +14°21'52.20"
Robert Zebahl
Leipzig (Germany)
55mm (42x) Well split with moderate distance. Primary component appeared white-yellowish. Pretty unequal pair.
Mark McCarthy
Fremont (California/USA)
317mm (340x) Bright yellow A, 3x fainter red B. Wide separation.
Mark McCarthy
Fremont (California/USA)
317mm (340x) 88 Leonis: A favorite! Yellow and blue pair, wide
★★ STT235 AB 5.7 7.5 0.9'' 43° 2017 UMa 11h32m20.76s +61°04'57.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice! Yellow and orange, 1.5 delta mag, split when seeing shows perfect disks. The stars both show albedo effects, look like suns / globes with shadowing.
★★ STF1552, 90 Leo AC 6.3 9.8 62.8'' 235° 2017 Leo 11h34m42.50s +16°47'48.90"
AB 6.3 7.3 3.5'' 209° 2017
Robert Zebahl
Leipzig (Germany)
55mm (42x) AB: A and B very tight and unequal. Much fainter component C very wide apart. All components almost in line. Very nice view. ../projects/doublestars/robert_zebahl/sketches/2019-03-09_90_leo.jpg
Mark McCarthy
Fremont (California/USA)
317mm (170x) AB: 90 Leonis, a close but easily split pair at 170x, a yellow-white A and a bluish-white B.
STF1555 AB 6.4 6.8 0.8'' 149° 2016 Leo 11h36m17.94s +27°46'52.70"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) blickweise gerade eben trennbar ../projects/doublestars/frederik_wanink/sketches/STF1555.jpg
Mark McCarthy
Fremont (California/USA)
317mm (443x) Nice! AB tight hair-split white pair, with fainter & wide separated AB-C in a row to the east.
HJ503 AB-C 5.8 11.2 22.5'' 156° 2016 Leo 11h36m17.94s +27°46'52.70"
Mark McCarthy
Fremont (California/USA)
317mm (443x) Nice! STF 1555AB tight hair-split white pair, with fainter & wide separated C in a row to the east.
STT575, 62 UMa AB 5.8 9.8 46.4'' 310° 2012 UMa 11h41m34.26s +31°44'45.80"
Mark McCarthy
Fremont (California/USA)
317mm (443x) 62 UMa. Bright and 3 delta mag wide B.
STF1568 10.4 10.5 9.2'' 43° 2015 Vir 11h43m16.61s +00°45'40.10"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1568.png
HU729 7.1 10.9 1.5'' 346° 2015 UMa 11h47m50.02s +49°49'22.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White star resolves to disk with seeing, but B not there. Apodizing mask did not help resolve.
STFB7, 93 Leo AB 4.6 9.0 77.0'' 356° 2015 Leo 11h47m59.23s +20°13'08.20"
Stefan Loibl
Rosenheim (Germany)
10x50 weak companion directly visible most of the time
BU603 AB 6.0 8.5 1.0'' 332° 2014 Leo 11h48m38.71s +14°17'03.20"
Uwe Pilz
Leipzig (Germany)
105mm (288x) nicht getrennt
ARG101 6.3 9.3 46.2'' 274° 2016 UMa 11h51m09.51s +33°22'30.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White star 8th mag, with very faint 2 delta mag very wide B.
STF1575 7.4 7.9 30.7'' 209° 2015 Vir 11h51m57.57s +08°49'48.00"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/doublestars/berthold_fuchs/photographs/STF 1575.png
STF1579, 65 UMa AB-C 6.7 8.3 3.8'' 40° 2017 UMa 11h55m05.74s +46°28'36.60"
AB-D 6.7 7.0 63.7'' 113° 2017
Robert Zebahl
Leipzig (Germany)
55mm (27x) AB-D: Easy to separate with large distance and very small difference in brightness. The D component showed a bluish tint, the lighter one (AB) a slightly yellowish tint. At higher magnification also the faint C component is visible.
Robert Zebahl
Leipzig (Germany)
55mm (83x) AB-C: Easy to split, but the faint C component only appeared as a tiny star. ../projects/doublestars/robert_zebahl/sketches/2019-02-09_65_uma.jpg
STT243 9.1 9.7 1.2'' 2017 UMa 11h59m48.70s +53°23'52.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Super tight split ~1", faint, white, 1 delta mag. M109 is nearby just in of FOV. This pair just beneath its core