Double Stars - R.A. 12h-18h

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 536
Visual Observations 1067
Sketches 82
Photographs 32
Observers 16
Werner E. Celnik, Berthold Fuchs, Sarah Gebauer, Christopher Hay, Gerd Kohler, Karsten Kopp, Winfried Kräling, Jens Leich, Stefan Loibl, Mark McCarthy, René Merting, Uwe Pilz, John Raymond, Jörg S. Schlimmer, Frederik Wanink, Robert Zebahl
m1 m2 ρ θ Year Coordinates (J2000)
STF1583 8m1 9m3 11.3'' 284° 2015 UMi 12h00m10.43s +86°59'40.00"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein kleines feines schön eng stehendes Sternpaar - Komponente A ist weiß und die Komponente B schmiegt sich grau-weiß an - Helligkeitsunterschied gut 1.5 Magnituden
67 UMa FOR1 AB 5m2 6m7 274.4'' 62° 2015 UMa 12h02m06.80s +43°02'44.30"
ARN5 AC 5m2 8m5 375.9'' 25° 2015
FOR1 AD 5m2 8m9 363.2'' 268° 2015
Robert Zebahl
Leipzig (Germany)
8x40 2020-04-05: The pair AB stands out immediately and shows itself in beautiful colors: A white-yellowish, B slightly orange. Almost at right angles to pair AB component C is visible as a faint star at a slightly smaller distance. I did not pay attention to the even fainter component D.
Robert Zebahl
Leipzig (Germany)
55mm (27x) 2020-04-05: Components A, B and C easily visible with decreasing brightness. I did not consider component D. A: white-yellowish, B: pale orange. I liked the view in the 8x40 binoculars better.
Robert Zebahl
Leipzig (Germany)
../projects/double-stars/robert-zebahl/photographs/2020-04-06_67_uma.jpg
A2163 10m3 10m4 0.7'' 169° 2016 Com 12h02m12.09s +21°07'36.90"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Excellent pair. Hairline split at 333x, nice wide split with 533x. Near equal, >0.5"
BRT2413 11m1 11m2 3.0'' 238° 2015 Com 12h03m23.03s +21°56'54.10"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Fine pair, faint, near equal, can just see above the sky background [not physical]
STF1596, 2 Com 6m2 7m5 3.7'' 236° 2017 Com 12h04m16.60s +21°27'33.00"
Robert Zebahl
Leipzig (Germany)
70mm (100x) 2020-04-04: At 44x almost separated, but clearly visible as figure '8'. At 57x just separated with clearly noticeable difference in brightness. At 100x easy to separate. Primary component appeared white-orange, companion rather greyish.
René Merting
Drachhausen (Germany)
100mm (107x) bei 107x setzt sich Komponente B knapp ab und zeigt sich westlich von A - Helligkeitsunterschied gut 1.5 Größenklassen
Mark McCarthy
Fremont (California/USA)
317mm (443x) Yellow-white A, 2 delta mag B. Pretty wide.
Mark McCarthy
Fremont (California/USA)
508mm (333x) 2 Com. Bright off white pair, wide, ~2 delta mag
BU458 7m9 10m0 30.1'' 236° 2014 Crv 12h04m17.11s -21°02'21.00"
René Merting
Drachhausen (Germany)
100mm (64x) bei 64x zeigt sich B sehr schwach im Südwesten von A gut abgesetzt, bei 32x war B nur eine Andeutung und noch zu schwach
COU92 12m3 12m5 0.8'' 115° 2015 Com 12h04m38.40s +22°31'42.70"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Marginal. I get flashes, very faint, of maybe a star pair but its a bit hazy
STF1600 7m6 8m3 7.8'' 94° 2015 UMa 12h05m34.42s +51°55'52.20"
Robert Zebahl
Leipzig (Germany)
70mm (44x) 2020-04-19: Uneven pair. At 22x medium bright and still pretty tight. At 44x beautiful sight: pale orange, grey-bluish.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Pretty orange and blue pair, 8-9 mag, 1.5 delta mag, wide separation ~10"
HU1136 6m3 10m2 2.1'' 212° 2015 UMa 12h05m39.70s +62°55'59.30"
Mark McCarthy
Fremont (California/USA)
317mm (885x) Tried real hard, up to 885x, but can't say I have it. Thought I had a condensation in the diffraction when seeing settled but not consistent and not a point.
STF1602 AB 8m3 9m9 21.1'' 180° 2017 Dra 12h07m07.57s +69°04'34.50"
AC 8m3 11m4 153.8'' 315° 2017
René Merting
Drachhausen (Germany)
320mm (72x) bei 72x zeigt sich B gut getrennt südlich von A - Helligkeitsunterschied mehr als eine Größenklasse - Komponente A reinweiß, B kupfergrau
STF1603 7m8 8m3 22.5'' 85° 2018 UMa 12h08m07.07s +55°27'50.70"
Robert Zebahl
Leipzig (Germany)
70mm (22x) 2020-04-07: At 22x quite apparent double star in rather poor surrounding. Nice separation with little difference in brightness. Primary component appeared slightly orange, companion grey-bluish. At 44x similar view in color appearance.
René Merting
Drachhausen (Germany)
320mm (45x) bei 45x gut getrennt - Komponente B im Osten wirkt grauorange gegen die weiß strahlende Komponente A - Helligkeitsunterschied eine halbe Größenklasse - ein schön isoliert stehendes Sternpaar
STF1604 AC 6m9 8m1 10.5'' 2017 Vir 12h09m28.54s -11°51'25.40"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x zeigt sich C ganz knapp nördlich von A - leichter Farbunterschied - mehr als eine Größenklasse Helligkeitsunterschied - auf B (10.0 mag/ Sep. 9") habe ich leider nicht geachtet
S634 7m2 8m8 4.7'' 302° 2017 Crv 12h11m22.93s -16°47'27.10"
René Merting
Drachhausen (Germany)
100mm (107x) bei 107x zeigt sich B nordwestlich von A leicht abgesetzt, etwas mehr als knapp getrennt - B ist mindestens eine Größenklasse schwächer und eher grau gegen die weiß strahlende Komponente A
Mark McCarthy
Fremont (California/USA)
203mm (333x) Pair of orange stars of equal magnitude widely separated at either end of the FOV. There are two faint blue pairs closer in to one of these. (The orange and the blue are the pair, though it's a surprise since the two orange stars look identical, may have formed together?)
STF1608 AB 8m1 8m3 13.6'' 221° 2017 UMa 12h11m27.76s +53°25'17.50"

../images/binary-star-orbits/STF1608-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (22x) 2020-04-19: Easy to find, medium bright. At 22x quite conspicuous with rather small difference in brightness. A difference in color is clearly visible: slightly orange, white-bluish. At 31x nice color contrast with a little more intensive colors: light orange & light blue.
René Merting
Drachhausen (Germany)
320mm (72x) bei 72x ein schönes helles Pärchen, beide Komponenten sind gleich hell und zahncremeweiß
STF1607 AB 8m9 9m8 26.7'' 28° 2017 CVn 12h11m33.63s +36°05'21.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide split, 0.5 delta mag.
STF1609 AB 8m0 9m6 11.1'' 205° 2015 UMa 12h11m41.76s +50°50'15.80"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Orange and blue, 2 delta mag, pretty.
STF1613 9m3 9m4 1.2'' 2017 CVn 12h12m34.01s +35°45'45.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very tight equal white, splits clean with the seeing
STF1615 AB 7m0 8m6 26.8'' 88° 2017 Com 12h14m06.61s +32°47'03.20"
René Merting
Drachhausen (Germany)
18x70 ein schickes enges ungleiches Pärchen - Komponente B steht nicht zu knapp getrennt von A im Osten - Helligkeitsunterschied etwa zwei Größenklassen - Komponente strahlt warmweiß, B grauweiß
STF1618 9m5 9m5 26.0'' 245° 2015 Vir 12h15m03.46s +09°59'27.10"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/STF%201618.png
A1781 10m2 11m0 2.9'' 303° 2017 CVn 12h16m19.33s +44°43'25.90"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Very fine faint pair, 1 delta mag, ~3"
AG176 10m2 10m2 2.3'' 184° 2017 Com 12h16m46.54s +30°03'51.80"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Nice equal white, ~3" separation
STF1626 9m4 9m6 2.1'' 2017 Dra 12h16m47.11s +70°08'45.70"
Robert Zebahl
Leipzig (Germany)
120mm (150x) Components similar in brightness, pretty faint, close together, but clearly split.
STT245 5m7 11m2 8.4'' 282° 2016 Com 12h17m30.60s +28°56'13.60"
Mark McCarthy
Fremont (California/USA)
317mm (443x) Yellow-white A with very faint B due west, wide separation.
René Merting
Drachhausen (Germany)
320mm (144x) bei 72x nichts - bei 144x zeigt sich Komponente B schön abgesetzt westlich von A - der Hauptstern ist gleißend weiß, B ist ein kleines unscheinbares, farbloses Pünktchen - trotzdem nicht uninteressant
Mark McCarthy
Fremont (California/USA)
508mm (333x) Orange-yellow A and orange B, ~3 delta mag, wide
STF1628 AB 9m5 10m1 9.6'' 240° 2015 Vir 12h18m42.90s +11°47'46.30"
AC 9m5 11m8 45.1'' 345° 2015
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/STF%201628.png
STF1630 9m5 10m3 2.5'' 171° 2017 UMa 12h18m53.81s +56°22'06.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) ~2", half a delta mag, faint pair, nice.
BU27 7m1 10m5 3.6'' 104° 2015 Com 12h20m04.86s +13°51'18.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Light orange A and very faint bluish B, seen with averted vision at first then can hold direct. ~4" to west. Nice!
STF1633 7m0 7m1 8.9'' 245° 2017 Com 12h20m41.37s +27°03'16.40"
Robert Zebahl
Leipzig (Germany)
70mm (22x) 2020-04-04: At 22x beautiful pair of equally bright components at quite small separation. At 44x a slight color difference was visible: white-orange & white-bluish.
Mark McCarthy
Fremont (California/USA)
317mm (443x) Yellow-white, equal brightness, wide separation to NE.
René Merting
Drachhausen (Germany)
320mm (72x) bei 72x ein schönes Pärchen zweier gleich heller Sterne - dicht beieinander stehend, aber gut getrennt - obwohl beide mitten im Coma Cluster stehen, zeigen sie sich schön isoliert
Mark McCarthy
Fremont (California/USA)
508mm (333x) Nice & wide, easy, bright light yellow stars
STF1634 8m8 9m9 5.4'' 147° 2018 Com 12h20m42.06s +22°54'51.80"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Light yellow A and slightly blue B, wide, ~2 delta mag
WNC4 9m7 10m2 53.2'' 77° 2017 UMa 12h22m12.53s +58°04'58.60"
René Merting
Drachhausen (Germany)
8x20 knapp direkt sichtbar, indirekt wie ein schwacher Stern - leicht diffuser Eindruck
René Merting
Drachhausen (Germany)
8x30 beide Sterne sind sehr schwach als längliche Aufhellung zu erkennen, mehr nicht
René Merting
Drachhausen (Germany)
10x50 zwei relativ einfach zu sehende schwache Sterne, ordentlich getrennt - beide Sterne sind gleich hell
René Merting
Drachhausen (Germany)
16x70 Zenitbeobachtung (leider kein echter Vorteil im Fujinon) - direkt als kompakter nebliger Fleck erkennbar, indirekt offenbaren sich zwei Sterne
René Merting
Drachhausen (Germany)
18x70 Zenitbeobachtung (definitiv ein Vorteil, weil besseres Einblickverhalten als beim Fujinon 16x70) - zwei relativ einfach zu sehende schwache Sterne, ordentlich getrennt - beide Sterne sind gleich hell
René Merting
Drachhausen (Germany)
100mm (20x) bei 32x sind beide Komponenten gut getrennt erkennbar - beide Sterne sind schwach und ohne großen Helligkeitsunterschied, der Stern im Osten wirkt leicht schwächer - zurück auf 20x sind beide Sterne noch immer bequem getrennt voneinander zu bestaunen
René Merting
Drachhausen (Germany)
200mm (40x) bei 40x sind eindeutig zwei gleichhelle nah beieinander liegende Sterne auszumachen
René Merting
Drachhausen (Germany)
320mm (45x) ein Sternpaar, das komfortabel getrennt ist - beide Sterne wirken grauorange
SHJ143, 12 Com AC 4m9 8m9 65.2'' 167° 2015 Com 12h22m30.32s +25°50'46.30"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Wide separation white and bluish, 3 delta mag. I feel like there is a fainter star closer in and 90 degrees PA from the B star. [AB is the fainter pair, 4.86/11.8 36.7", AC is the main pair described.]
Mark McCarthy
Fremont (California/USA)
203mm (205x) Wide separation white and bluish, 3 delta mag. Feel like there is a fainter star closer in and 90 degrees PA from the companion star (this is AB).
René Merting
Drachhausen (Germany)
320mm (72x) bei 72x ist Komponente C weit abseits im Süden von A erkennbar - der Hauptstern strahlt maisgelb, C grau, dadurch schöner Farbkontrast
STF1636, 17 Vir 6m5 9m3 21.0'' 338° 2017 Vir 12h22m32.14s +05°18'20.10"
René Merting
Drachhausen (Germany)
18x70 A und B sind knapp getrennt erkennbar - B sitzt im NW von A - großer, nicht abschätzbarer Helligkeitsunterschied - nett anzusehen, wenn man B erst einmal entdeckt hat
Mark McCarthy
Fremont (California/USA)
317mm (340x) 17 Virginis, widely separated, large magnitude difference, with a yellow-white A and a ruddy / brownish B
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/STF%201636.png
STT249 AB 8m2 9m2 0.4'' 257° 2016 UMa 12h23m50.80s +54°09'30.50"
Mark McCarthy
Fremont (California/USA)
317mm (738x) very slightly notched elongation / overlapped disks.
STF1639 AB 6m7 7m8 1.8'' 323° 2018 Com 12h24m26.81s +25°34'56.70"
AC 6m7 11m4 91.4'' 159° 2015

../images/binary-star-orbits/STF1639-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (133x) AB: 2020-04-04: The double star is clearly elongated, with the fainter companion attached to the primary component.
Mark McCarthy
Fremont (California/USA)
203mm (205x) AB: White and slightly blue pair, close, around 3"
Mark McCarthy
Fremont (California/USA)
203mm (205x) AB: White and slightly blue pair, close, around 3"?
Mark McCarthy
Fremont (California/USA)
317mm (443x) AB: Close but well split, 1.5 delta mag, ~2.5"
Mark McCarthy
Fremont (California/USA)
508mm (333x) AB: Pretty yellow stars, ~2" separation, ~2 delta mag
STF1642 8m8 9m4 2.5'' 180° 2017 CVn 12h25m45.00s +44°44'04.40"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Very nice light orange and blue, 1 delta mag, ~3"
STF1643 AB 9m0 9m4 2.7'' 2018 Com 12h27m13.72s +27°01'29.60"

../images/binary-star-orbits/STF1643-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Equal orange pair, ~3", PA to north.
Mark McCarthy
Fremont (California/USA)
508mm (333x) Yellow-white stars, ~3" separation, ~2 delta mag
COU53 12m1 12m7 2.4'' 213° 2017 Com 12h27m58.02s +21°58'11.90"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Faint pair, split clearly with averted vision, hazy with direct. A nice pair
STF1645 7m5 8m1 9.8'' 156° 2017 CVn 12h28m04.45s +44°47'39.50"
Gerd Kohler
Langenzenn (Germany)
254mm (76x) Der Doppelstern ist getrennt. Bläulich-weiß - bläulich-weiß. Gleiche Helligkeit.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Wide, bright yellowish-white pair, ~1 delta mag
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/STF%201645.png
STF1646 10m3 12m9 5.6'' 260° 2017 CVn 12h28m09.12s +36°41'02.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and blue. Need averted vision for B to reveal itself. Pretty!
STFA21, 17 Com, AI Com AB 5m2 6m6 146.4'' 251° 2018 Com 12h28m54.72s +25°54'46.40"
René Merting
Drachhausen (Germany)
320mm (72x) bei 72x ein weit auseinander stehendes Paar - schöner Farbkontrast, A weißblau, B im SW leicht gelblich schimmernd
STT251 8m3 9m3 0.7'' 55° 2018 CVn 12h29m07.72s +31°23'25.40"

../images/binary-star-orbits/STT251-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Decidedly not round disk -- there's also a brightening in the diffraction. Marginal.
SHJ145, delta Crv, 7 Crv, Algorab AB 3m0 8m5 24.0'' 215° 2015 Crv 12h29m51.86s -16°30'55.60"
Robert Zebahl
Leipzig (Germany)
70mm (47x) Large difference in brightness and pretty wide apart. Primary component appeared white-bluish. The B component was too faint for seeing colors.
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein schöner Doppelstern - A ist weiß, leicht hellgelb - B steht gut getrennt im Südwesten, ganz schwach, mehr als 3 Größenklassen schwächer
HJL1069 7m8 10m1 115.4'' 312° 2015 Com 12h30m19.91s +21°56'53.60"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Lovely wide pair, 2.5 delta mag. Clean image
Mark McCarthy
Fremont (California/USA)
203mm (205x) Lovely wide pair, 2.5 delta mag.
J1023 11m4 11m9 5.2'' 173° 2019 CVn 12h30m46.44s +36°39'34.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Excessively faint, averted vision required to pick out, well separated.
★★★ SHJ146 AB 7m7 8m7 49.5'' 290° 2017 Vir 12h31m14.61s +01°19'37.00"
René Merting
Drachhausen (Germany)
18x70 Komponente B ist westlich von A erkennbar - Helligkeitsunterschied 1.5 Magnituden - A weiß, B grau - das Sternpaar fällt auf, weil kaum gleichhelle Sterne in der Umgebung stehen
Robert Zebahl
Leipzig (Germany)
70mm (33x) Visible difference in brightness and color. I couldn't precisely define the colors itself, but A appeared rather orange, B rather bluish.
Robert Zebahl
Leipzig (Germany)
102mm (28x) Pretty wide pair with visible difference in brightness and lovely color contrast. A: pale orange, B: light blue.
STF1649 8m0 8m4 15.7'' 194° 2018 Vir 12h31m36.46s -11°04'20.20"
René Merting
Drachhausen (Germany)
18x70 ein sehr enges, helles Pärchen - Komponente B im Süden knapp getrennt und minimal schwächer - sehenswert, da kaum gleichhelle Sterne im Umfeld sichtbar sind
STF1652 10m1 10m4 6.1'' 178° 2017 Com 12h32m31.07s +21°06'03.30"
Mark McCarthy
Fremont (California/USA)
203mm (333x) KK Com. Wide, ~1 delta mag, pleasing view [very slight magnitude variance only 0.2 mag.]
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint near equal, pretty wide 5-6".
STF1653 9m7 9m7 8.0'' 343° 2017 CVn 12h33m22.34s +32°02'23.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Easy, near equal pair, yellowish A and bluish B. ~10"
★★ WRH12, 23 Com 5m0 6m9 0.3'' 12° 2016 Com 12h34m51.12s +22°37'45.10"

../images/binary-star-orbits/WRH12-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (1067x) 23 Com. I get a definite snowman and can tell the larger from the smaller star, pointed in a certain direction in relation to a faint field star. Short Period double
★★ STF1657, 24 Com 5m1 6m3 20.2'' 272° 2018 Com 12h35m07.76s +18°22'37.40"
René Merting
Drachhausen (Germany)
18x70 ein wunderschönes eng stehendes FG-Sternpaar - Komponente B im Westen ist 1.5 Magnituden schwächer - A strahlt weißgelb, B wirkt dagegen etwas unterkühlt
Robert Zebahl
Leipzig (Germany)
70mm (22x) 2020-04-04: Splendid sight! Very nice difference in brightness and color: pale orange & grey-blue.
Robert Zebahl
Leipzig (Germany)
102mm (28x) Very beautiful view with moderate distance and difference in brightness. A: glossy, light orange, B: white- bluish.
Robert Zebahl
Leipzig (Germany)
200mm (60x) Well split with obvious difference in brightness. Fainter component appeared bluish, the brighter one slightly orange.
Mark McCarthy
Fremont (California/USA)
203mm (205x) Very pretty bright light orange and fainter blue, wide separation. Such a sight!
Mark McCarthy
Fremont (California/USA)
203mm (205x) COM 24. Very pretty bright light orange and fainter blue, wide separation.
Mark McCarthy
Fremont (California/USA)
317mm (443x) 24 Com. Pretty orange and blue pair, 2 delta mag, very wide
★★ AG180 7m8 9m8 0.3'' 355° 2007 Com 12h36m48.74s +20°14'15.80"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Most remarkable. I can see the light orange airy disk of A, though it dances in diffraction. When seeing stills, a very fine, very small point presents itself for a moment before being washed out. Consistently in the same place as I move the eyepiece about
STF1663 8m0 9m2 0.5'' 65° 2017 Com 12h37m10.81s +21°11'52.50"

../images/binary-star-orbits/STF1663-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (333x) Hairline split, ~1 delta mag, tough. Light yellow-orange A
COU392 10m3 11m0 2.1'' 335° 2017 Com 12h37m22.38s +23°21'28.40"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Faint pair, B star seen with averted vision only
STF1664 AB 7m8 9m2 39.2'' 223° 2018 Vir 12h38m19.95s -11°31'01.10"
René Merting
Drachhausen (Germany)
18x70 ein ordentlich getrenntes Pärchen - B im Südwesten ist gut eine Größenklasse schwächer - A zeigt ein wenig Farbe, weißgelblich
STF1666 8m2 10m3 7.4'' 192° 2017 Com 12h39m10.03s +14°19'38.10"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Nice pair, very wide, ~2 delta mag. Physical
★★★ STF1670, gamma Vir, 29 Vir, Porrima AB 3m5 3m5 2.7'' 2018 Vir 12h41m39.60s -01°26'57.90"

../images/binary-star-orbits/STF1670-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
55mm (56x) 2019-05-18: At 38x slightly elongated. At 56x touching diffraction disks. At 71x clearly separated with very small gap.
Robert Zebahl
Leipzig (Germany)
70mm (104x) 2019-05-04: At 47x clearly visible as '8', at 73x split with almost touching diffraction disks. At 104x clearly separated, equally bright and pretty close together. The gap was smaller than the diameter of the diffraction disk.
Robert Zebahl
Leipzig (Germany)
102mm (125x) 2019-05-01: Extremely nice double star! Equally bright and relatively close together. Both components appeared yellowish-white.
Uwe Pilz
Leipzig (Germany)
105mm (200x) weiß-weiß, die nördliche Komponente ist eine Winzigkeit heller
Winfried Kräling
Marburg (Germany)
127mm (146x) 21.04.2018: Bei V=100x erscheint dieser orangefarbene Doppelstern bereits als „8“. Bei V=146x ist Porrima voll getrennt. ../projects/double-stars/winfried-kraeling/sketches/180421_03_Gamma%20Vir.jpg
Sarah Gebauer
Germany
150mm (166x) die 2,8'' entfernten Komponenten A und B konnten haarscharf bei 83x und 166x getrennt werden, beide strahlen gleich hell als ganz dichte Glanzpünktchen; Komponenten E und F wurden gesehen, C und D allerdings nicht; bei 83x waren AB ganz knapp nicht mehr voneinander getrennt ../projects/double-stars/sarah-gebauer/sketches/20200416%20Gamma%20Vir%20DSk.jpg
Mark McCarthy
Fremont (California/USA)
317mm (170x) Porrima. Very pretty yellow-white, near equal, close split at 170x. Star disks improved with apodizing mask.
STT253 8m0 10m5 6.5'' 238° 2015 Com 12h43m59.85s +21°10'22.90"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Blue-white A and can detect B with direct vision, but it flashes with averted. Wide
HO256 7m3 9m6 0.5'' 120° 2016 CVn 12h44m08.82s +35°46'07.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) The airy disk is not clean indicating it's not single, but can't split for the seeing. Marginal
STF1678 7m2 7m7 37.5'' 170° 2018 Com 12h45m26.17s +14°22'24.90"
Robert Zebahl
Leipzig (Germany)
8x40 2020-04-05: Clearly separated, but still quite close together with a fainter companion. Well visible difference in brightness without any detectable colors.
René Merting
Drachhausen (Germany)
18x70 ein schönes helles Sternpaar, komfortabel getrennt - Komponente B im Süden ist nur minimal schwächer als A
Robert Zebahl
Leipzig (Germany)
70mm (22x) 2020-04-04: At 22x noticeable double star with slight difference in brightness. Primary component appeared white-yellowish, companion appeared slightly orange. The color impression was a little better visible at 44x.
Mark McCarthy
Fremont (California/USA)
317mm (443x) Wide separation near equal white pair
STF1679 AB 9m6 10m0 5.9'' 208° 2017 CVn 12h46m00.83s +49°49'23.00"
AC 9m6 13m7 69.1'' 37° 2015
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB: Fairly faint equal magnitude, 3"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/STF%201679.png
STF1694 AB 5m3 5m7 21.8'' 324° 2017 Cam 12h49m13.80s +83°24'46.30"
Christopher Hay
Seeheim (Germany)
15x45 Binoculars with internal stabilisation, handheld. AB cleanly split with distinct difference in magnitudes. Strong visual presence of this physical double is enhanced by the complete lack of visual competition in 4.5° FOV. Interesting to contemplate that in the 9th century AD Struve 1694 was just as close to the celestial north pole as Polaris (also a physical double) is today. Also known as 32H Cam, which comes from the celestial map produced by Johannes Hevelius in the late 17th century.
Robert Zebahl
Leipzig (Germany)
70mm (15x) Easy to split with noticeable angular distance and slight difference in brightness. The faint component tends to be more bluish, the brighter one appeared more light yellowish.
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x strahlen beide Komponenten richtig hell und gut getrennt - leichter Farbkontrast, Komponente A ist leicht gelblich, B wirkt eher unterkühlt
STF1681 8m9 8m9 9.2'' 17° 2016 Vir 12h49m34.82s +03°49'05.60"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/STF%201681.png
STF1685 AB 7m3 7m8 16.0'' 202° 2018 Com 12h51m54.80s +19°10'19.90"
René Merting
Drachhausen (Germany)
18x70 ein schicker FG-Doppelstern - ein enges Paar mit der leicht schwächeren Komponente B im Süden - schwacher Farbkontrast, der wieder mal zwischen den Sternen hin und her zu springen scheint
Robert Zebahl
Leipzig (Germany)
70mm (22x) 2020-04-04: Lovely sight! Beautifully separated with little difference in brightness. Together with two other brighter stars the double star forms an almost right-angled triangle. At 44x the primary component appears in pale orange, the companion rather grey-bluish. ../projects/double-stars/robert-zebahl/sketches/2020-04-04_stf1685.jpg
Mark McCarthy
Fremont (California/USA)
317mm (443x) Wide white pair, 1 delta mag
Mark McCarthy
Fremont (California/USA)
317mm (553x) Brighter white A, 0.5 delta mag B, pretty wide separation.
STFA23, 32 Com AB 6m5 7m0 196.3'' 51° 2015 Com 12h52m12.26s +17°04'26.20"
AC 6m5 8m9 905.1'' 262° 2001
Robert Zebahl
Leipzig (Germany)
8x40 AB: 2020-04-05: Widely separated pair. The component A (32 Com) appeared slightly orange, the component B rather grey-bluish. Overall a beautiful sight. The double star is located right in the middle between the two bright stars 27 & 36 Com.
STF1686 AB 8m6 8m7 5.7'' 187° 2015 Com 12h52m58.16s +15°01'53.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Fine near equal pair of yellow-white stars, wide separation, PA to south.
Mark McCarthy
Fremont (California/USA)
508mm (333x) Near equal white, wide
STF1687, 35 Com AB 5m2 7m1 1.2'' 199° 2018 Com 12h53m17.77s +21°14'42.10"
AC 5m2 9m8 28.5'' 127° 2016

../images/binary-star-orbits/STF1687-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (205x) AC: Rich light yellow and much fainter wide blue B. Near M64. [Need to re-observe. I saw the wide AC, but not the AB which is 5.15/7.08 1.2"
Mark McCarthy
Fremont (California/USA)
317mm (205x) AC: Rich light yellow and much fainter wide blue B. Near M64. (Need to re-observe. I saw the wide AC, but not the AB which is 5.15/7.08 1.2")
Mark McCarthy
Fremont (California/USA)
317mm (443x) AC: Orange and blue, 3 delta mag, very wide separation to the east. Did not notice AB
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: 35 Com: Bright orange & fainter B, showpiece, ~1.5"
Mark McCarthy
Fremont (California/USA)
508mm (533x) AB: 35 Com. Can see the 7th magnitude B at 333x, but it's easier to resolve with 533x. Part of plus one. Bright orange A and deeper orange B
STF1688 AB 9m2 11m1 14.4'' 344° 2015 CVn 12h53m35.26s +37°58'20.90"
Mark McCarthy
Fremont (California/USA)
317mm (71x) a faint pair, yellow A and orangish B, which I identified using 340x, but can still split at 71x with STF 1692 & STF 1702 in the same low power field
S643 7m1 8m2 23.3'' 295° 2015 Crv 12h54m00.29s -18°02'15.40"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein schön anzusehendes Sternpaar - ordentlich getrennt, konkurrenzlos - A schön weiß, B blaugrau
MET9 5m7 7m8 1.7'' 50° 2016 Com 12h54m39.98s +22°06'28.80"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Using 8" 205x I see nothing. 8" 410x suspect elongation. 8" 667x I see a fleeting, bluish point just outside of first diffraction ring. A is light yellow orange and bright, 2 delta mag. to B. A star feels elongated / egg shaped. With 20" and 667x the seeing is too messy though there is a knot in the diffraction where I had noticed the point with 8". Strong feeling A is elongated.
Mark McCarthy
Fremont (California/USA)
203mm (667x) At 205x see nothing. 410x suspect elongation. 667x see a fleeting, bluish point just outside of first diffraction ring. A is light yellow orange and bright, 2 delta mag. to B. A feels elongated / egg shaped. At 20" and 667x the seeing is too messy though there is a knot in the diffraction where I had noticed the point with 8". Strong feeling A is elongated.
STF1689 7m1 9m1 30.2'' 223° 2015 Vir 12h55m30.32s +11°29'46.40"
René Merting
Drachhausen (Germany)
18x70 ein sehr ungleiches Paar - Komponente A ist der hellste Stern in der Umgebung, B ist sehr schwach und steht ordentlich abgesetzt im Südwesten von A - Helligkeitsunterschied 2.5 Magnituden
Mark McCarthy
Fremont (California/USA)
317mm (443x) Orange and blue, very wide separation
★★ STF1692, 12 CVn, alpha CVn, Cor Caroli AB 2m9 5m5 19.5'' 230° 2018 CVn 12h56m01.67s +38°19'06.20"
Christopher Hay
Seeheim (Germany)
11x80 Difficult, but definitely split. Interesting to compare directly with Zeta UMa (Alcor): the latter very close to separation, but not quite there.
Robert Zebahl
Leipzig (Germany)
70mm (22x) Beautiful view. Clearly unequal with nice angular distance. Primary component appeared in pale yellow, companion silvery-white.
René Merting
Drachhausen (Germany)
100mm (32x) bei 64x ein auffälliger Doppelstern - A ist gleißend weiß, B im Südwesten ist 1.5 Größenklassen schwächer (2.67 mag lt. Stelle Doppie, schon zum zweiten Mal vertan hier)
Uwe Pilz
Leipzig (Germany)
105mm (66x) blauweiß-orange, trennbar bei 16x
Uwe Pilz
Leipzig (Germany)
105mm (200x) schon bei 26x getrennt ../projects/double-stars/uwe-pilz/sketches/CorCaroli.jpg
Robert Zebahl
Leipzig (Germany)
114mm (28x) Well split with big difference in brightness.
Sarah Gebauer
Germany
150mm (83x) deutlicher Helligkeitsunterschied, sehr einfach zu trennen ../projects/double-stars/sarah-gebauer/sketches/20200415%20Alpha%20CVn%20DSk.jpg
Mark McCarthy
Fremont (California/USA)
203mm (205x) Cream white and light canary yellow. Well separated, 2 delta mag.
Mark McCarthy
Fremont (California/USA)
203mm (205x) Cor Caroli: Cream white and light canary yellow. Well separated, 2 delta mag.
Gerd Kohler
Langenzenn (Germany)
254mm (76x) Weiß-leicht bläulich - leicht orange rötlich. Kleiner Helligkeitsunterschied.
Mark McCarthy
Fremont (California/USA)
317mm (71x) Cor Caroli. Cream and bluish, use low power to fit STF 1688 & STF 1702 in the same field.
René Merting
Drachhausen (Germany)
320mm (72x) bei 72x ein schönes Pärchen - A ist weiß - B zeigt sich gut getrennt südwestlich von A, ist gut 1.5 Größenklassen schwächer (2.67 mag laut Stelle Doppie) und mit einem leichten Stich ins gelbliche (warmweiß) - zurück auf 20x eine ungleiche 8, bei 32x knapp getrennt
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/STF%201692.png
STF1695 AB 6m0 7m8 3.9'' 281° 2017 UMa 12h56m17.64s +54°05'58.10"
AC 6m0 12m3 131.7'' 139° 2015
Robert Zebahl
Leipzig (Germany)
70mm (57x) AB: Easily separable, but still quite close together with a relatively large difference in brightness. The companion appeared only as a tiny star.
STT256 7m3 7m6 1.1'' 101° 2017 Vir 12h56m26.59s -00°57'16.60"

../images/binary-star-orbits/STT256-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide separation equal brightness white stars
BU925 7m0 11m1 6.5'' 209° 2016 CVn 12h56m38.81s +43°33'07.20"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Bright white and extremely faint B, wide separation. B flashes with averted vision to see, can hold with direct vision with seeing
STT257 8m5 9m6 13.0'' 353° 2017 CVn 12h56m44.77s +45°36'45.10"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Wide white and dull blue-white pair.
STF1696 9m4 9m5 3.7'' 204° 2017 Com 12h57m24.25s +30°22'15.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Fairly faint near equal white pair.
STF1702 8m7 9m4 35.9'' 83° 2017 CVn 12h58m31.97s +38°16'43.60"
Mark McCarthy
Fremont (California/USA)
317mm (71x) wide orange-yellow pair, in same low power field as STF 1692 & STF 1688
STF1699 8m7 8m8 1.7'' 12° 2017 Com 12h58m40.88s +27°28'27.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Close 1.5" equal white.
Mark McCarthy
Fremont (California/USA)
508mm (333x) White near equal pair, ~1.5" separation. Nice
STF1701 7m6 9m9 21.5'' 306° 2015 Vir 12h59m20.16s +06°30'21.10"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/STF%201701.png
78 UMa, BU1082 5m0 7m9 0.8'' 127° 2017 UMa 13h00m43.59s +56°21'58.80"

../images/binary-star-orbits/BU1082-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (260x) nicht getrennt
STF1709 7m9 10m0 2.7'' 252° 2016 Com 13h02m30.62s +23°29'57.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice! Brighter yellowish white A and 4 delta magnitude B, wide separation ~3" to west.
Mark McCarthy
Fremont (California/USA)
508mm (333x) White stars, ~2 delta mag, ~3" separation. Very attractive pair
COU95 9m7 11m3 0.7'' 287° 2010 Com 13h02m34.66s +23°17'38.60"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Tentative split at 333x, definite with 533x, with seeing for both. More than 1 delta mag, >0.5" separation
STF1712 10m2 10m6 9.1'' 332° 2016 Vir 13h03m32.39s +09°28'08.00"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/STF%201712.png
STF1714 10m3 10m4 3.1'' 308° 2017 Com 13h03m40.25s +23°38'35.30"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Near equal white, ~3". Surprisingly not physical
STF1718 AB-C 9m8 10m1 13.1'' 272° 2015 CVn 13h05m30.27s +50°59'11.00"
Mark McCarthy
Fremont (California/USA)
317mm (277x) faint equal pair with wide separation. AB is 0.2" not seen--BU 643
HO257 10m4 10m9 2.0'' 154° 2016 Com 13h05m51.04s +26°13'36.40"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Equal white, nice, ~2"
HJ2638 A-BC 7m5 11m1 6.2'' 223° 2015 Com 13h06m10.29s +29°01'45.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint blue preceding a bright white. Did not notice BC, BU 1083, 0.4"
HJ2639 AB 7m5 11m2 36.0'' 158° 2015 CVn 13h06m13.50s +40°55'21.00"
AC 7m5 10m8 52.3'' 137° 2015
BC 11m2 10m8 22.9'' 102° 2015
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB: Nice triple. Orange-yellow A and bluish 2 delta mag B and C, wide sep.
Mark McCarthy
Fremont (California/USA)
317mm (277x) AC: Nice triple. Orange-yellow A and bluish 2 delta mag B and C, wide sep.
COU11, 39 Com AB 6m1 8m8 1.8'' 314° 2015 Com 13h06m21.28s +21°09'12.60"
Mark McCarthy
Fremont (California/USA)
203mm (333x) 39 Com. Very beautiful pair, A is creamy white, B is much fainter and bluish, ~1.5", resolved with seeing just beyond first diffraction
Mark McCarthy
Fremont (California/USA)
203mm (667x) Probably 2" separation, 2 delta mag. Tough observation
Mark McCarthy
Fremont (California/USA)
203mm (667x) 39 Com. Probably 3" separation, 2 delta mag.
STF1719 AB 7m6 8m2 7.1'' 358° 2016 Vir 13h07m19.75s +00°35'06.70"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/STF%201719.png
COU2708 9m6 10m5 4.0'' 78° 2016 Com 13h08m04.40s +23°24'42.80"
Mark McCarthy
Fremont (California/USA)
203mm (333x) B seen with averted vision, then I can hold direct. White stars, ~5". Nice. Physical
STF1723 8m7 10m1 6.3'' 12° 2015 CVn 13h08m13.49s +38°44'20.20"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Yellow and blue, around 5", 2 delta mag
Mark McCarthy
Fremont (California/USA)
508mm (205x) Light yellow and light orange, 1.5 delta mag, well split
Mark McCarthy
Fremont (California/USA)
508mm (205x) Light yellow and light orange, 1.5 delta mag, well split.
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/STF%201723.png
STF1722 8m4 9m3 2.5'' 337° 2017 Com 13h08m26.46s +15°29'29.90"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Nice pair, white A and yellowish B, ~3" and ~2 delta mag
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange A, 1 delta mag B, ~3". Faint pair.
STF1724, theta Vir, 51 Vir AB 4m4 9m4 6.8'' 342° 2014 Vir 13h09m57.01s -05°32'20.10"
Robert Zebahl
Leipzig (Germany)
70mm (47x) Easy to split with large difference in brightness. Very faint B component clearly apart from the primary component.
★★ STF1728, 42 Com AB 4m8 5m5 0.5'' 193° 2019 Com 13h09m59.28s +17°31'46.00"
AB-C 4m4 11m4 84.8'' 349° 2014
Mark McCarthy
Fremont (California/USA)
317mm (443x) AB-C: Alpha Com: Bright yellow, very faint blue B
Mark McCarthy
Fremont (California/USA)
508mm (1067x) AB: Diadem. !! Most definite well split near equal, light yellow-orange. A faint star [AB-C] also in the field to tell orientation. Short period, made sketch. Wow!
STFA24 AB 6m0 6m3 275.6'' 296° 2012 CVn 13h10m03.27s +38°29'55.90"

This double star contains of the components 15 and 17 CVn.

Robert Zebahl
Leipzig (Germany)
8x40 Both components similar in brightness with large distance.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Wide bright pair
René Merting
Drachhausen (Germany)
320mm (45x) extrem weit getrennt, ein auffälliges Trio zusammen mit 16 CVn nördlich - eher etwas für Kleinst-Ferngläser
COU96 AB 6m8 10m8 10.8'' 310° 2015 Com 13h10m52.35s +21°14'01.40"
Mark McCarthy
Fremont (California/USA)
203mm (333x) White A, very faint B, can detect it direct vision but brightens with averted
COU54 6m8 10m9 10.5'' 288° 2015 Com 13h11m32.36s +21°55'07.40"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Brighter white A, need averted vision for B, wide
STT261 7m4 7m6 2.6'' 339° 2017 CVn 13h12m02.02s +32°05'07.90"

../images/binary-star-orbits/STT261-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (57x) 2020-04-20: At 44x immediately visible as figure '8', even separable on closer look. The components appeared similarly bright. Overall rather dim. At 57x clearly split, but still very close together with a small difference in brightness.
Mark McCarthy
Fremont (California/USA)
203mm (205x) Light yellow-white equal pair, ~1.5"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Light yellow-white equal pair, ~1.5".
RST3829 & SHJ162 RST3829 Aa-Ab 7m3 9m1 0.5'' 166° 2018 Vir 13h14m55.72s -11°22'09.90"
SHJ162 AB 7m1 8m2 113.2'' 45° 2017
SHJ162 BC 8m2 13m3 66.2'' 136° 2015

../images/binary-star-orbits/RST3829-Aa-Ab-orbit.jpg

René Merting
Drachhausen (Germany)
100mm (32x) SHJ162 (AB): bei 32x weit auseinander stehend - ein eigentümlicher Farbkontrast, A strahlt weiß, B kupfern
Mark McCarthy
Fremont (California/USA)
317mm (340x) SHJ162 (AB): a widely separated yellow A and orange B, 1 magnitude difference.
BGH46 AB 6m5 7m6 202.9'' 58° 2015 Com 13h16m32.26s +19°47'07.00"
Robert Zebahl
Leipzig (Germany)
8x40 2020-04-05: Widely separated with well visible difference in brightness. A appeared slightly white-bluish, B darker in color and not clearly definable.
Mark McCarthy
Fremont (California/USA)
80mm (13x) Wide finder split, 1 delta mag, not much to recommend. Triangle of stars to the south, pointing to Bgh 46. [I did look at this at 667x to see if one of the wide pair had a pair of its own, but did not scrutinize well enough. This one should try on a really good night with 20": HDS1862 = Aa,Ab 6.56/9.69 0.4".]
BU800 AB 6m7 9m5 7.6'' 104° 2018 Com 13h16m51.05s +17°01'01.90"

../images/binary-star-orbits/BU800-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (205x) Lovely yellow and orange, very pretty. Wide separation, 2.5 delta mag.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Lovely yellow and orange, very pretty, wide separation, 2.5 delta mag.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Nice pair, A is a light but rich yellow, B is blue-white. Wide, ~2 delta mag
Mark McCarthy
Fremont (California/USA)
317mm (553x) Not difficult, orange-yellow A with bluish B, 3 delta mag. pretty wide to east.
★★ HU644 AB 9m1 9m9 0.1'' 354° 2019 CVn 13h19m45.58s +47°46'41.10"

../images/binary-star-orbits/HU644-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (443x) Orange-red pair, near equal mag, split with seeing at 443x
STF1734 6m8 7m3 1.1'' 173° 2017 Vir 13h20m41.57s +02°56'31.90"

../images/binary-star-orbits/STF1734-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (104x) Double star appeared slightly elongated without noticeable notching.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Blue-white A, light orange B, half delta mag, close ~1.5". Nice!
STF1737 7m8 10m3 15.3'' 219° 2016 Com 13h21m48.68s +17°45'55.70"
René Merting
Drachhausen (Germany)
320mm (45x) bei 45x einfach - Komponente B steht gut abgesetzt westlich von A - Helligkeitsunterschied gut 2.5 Magnituden - bei 72x kommt der Farbunterschied etwas besser zur Geltung - A erscheint weiß, B weißgrau
A566 9m0 10m8 2.0'' 66° 2016 Com 13h22m17.99s +26°31'10.10"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Wow, very fine, very delicate pair, ~2" and ~2-3 delta mag
HO259 AB 7m7 12m7 10.0'' 245° 2015 Com 13h22m34.15s +26°06'56.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) B is very faint, averted vision only, fairly wide sep. ~10-12" to west.
STF1740 7m1 7m4 25.6'' 75° 2018 Vir 13h23m39.16s +02°43'24.00"
Stefan Loibl
Rosenheim (Germany)
10x50 close double star for binoculars, clearly split, component A slightly reddish
René Merting
Drachhausen (Germany)
18x70 ein auffälliges, schön eng zusammen stehendes Sternpaar - Komponente B im Osten ist nur knapp schwächer
Robert Zebahl
Leipzig (Germany)
70mm (33x) Easy to separate, slightly unequal with moderate angular distance. A: pale orange, B: color not clearly perceptible.
Uwe Pilz
Leipzig (Germany)
105mm (88x) gelb und orange, der westliche ist einen Hauch heller. Schon auffallend bei 2x, sehr schön bei 88x ../projects/double-stars/uwe-pilz/sketches/200516STF1740.jpg
Mark McCarthy
Fremont (California/USA)
203mm (333x) hair split equal white pair. Suspected elongation at 205x but needed 333x to split. 667x too much power given the conditions.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Easy wide white A and hint or orange B.
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/STF%201740.png
★★ zeta UMa STF1744, 79 UMa, Mizar AB 2m2 3m9 14.4'' 153° 2017 UMa 13h23m55.42s +54°55'31.50"
STF1744, Mizar & Alcor AC 2m2 4m0 707.7'' 72° 2017
SMR4 AD 2m2 7m6 492.8'' 102° 2017
Christopher Hay
Seeheim (Germany)
naked eye AC, Mizar/Alcor: After seeing the two stars separated for the first time under clear corona skies in spring 2020, this became a regular and easy sighting. Naked-eye star splitting is a skill that develops rapidly with practice. Mizar and Alcor are wide apart with my 60-year-old eyes, and occasionally Alcor appears slightly bluish.
René Merting
Drachhausen (Germany)
8x30 AC: ein ultraweit getrenntes Pärchen - Komponente C im NO schätze ich eine Größenklasse schwächer ein (1.78 mag laut stelle Doppie) - Komponente D (SMR4) ist östlich der beiden Sterne ganz schwach erkennbar, D steht dabei näher zu C
Robert Zebahl
Leipzig (Germany)
8x40 AB: 2020-04-05: Even with tripod not separable.
Christopher Hay
Seeheim (Germany)
15x45 AB: Binoculars with internal stabilisation, handheld. AB nicely split with strong difference in magnitudes between A and B, very pretty.
Christopher Hay
Seeheim (Germany)
42mm (12x) AB: At 6.3x substantially elongated with clear positions of the brighter/darker components. At 10.7x a very stretched figure-eight tantalisingly close to popping apart. At 12x cleanly split with a stable sliver of black between A and B.
Robert Zebahl
Leipzig (Germany)
70mm (10x) AB: 2020-04-12: Observation from city with a 70/400mm ED refractor, for which I made aperture masks from 10mm to 60mm. Goal was to find the minimum magnification for a successful split.

70mm: At 12.5x no separation of the components possible due to outshining. Grey filters brought a slight improvement, but again no separation or elongation was visible.

60mm: At 12.5x slight outshining of the companion, clearly elongated and almost separated.

50mm: At 12.5x the companion was almost outshined. A separation was just possible.

40mm: At 12.5x both components appear finely separated from each other.

30mm: At 10x not clearly separable due to outshining, but clearly elongated. At 12.5x then quite easy to separate with a fine star rendition.

20mm: At 10x the companion is still clearly visible, but quite close to the primary component. At 12.5x best view under the used apertures with a very fine rendition!

10mm: At 10x the companion appears very faint. Separation possible, but extremely tight. At 12.5x reasonably well separated.
Robert Zebahl
Leipzig (Germany)
70mm (22x) AB: 2020-04-11: At 12x no separation possible, because the bright primary component outshines the companion. At 22x clearly separated, but still quite close together.
Robert Zebahl
Leipzig (Germany)
102mm (28x) First pastel sketch (Pitt pastel by Faber-Castell) of a double star on black paper, where also the halos were sketched around the stars. The stars themselves were redrawn with an Edding (Edding 1500, Soft Pastel white). The sketch shows the components A to D. ../projects/double-stars/robert-zebahl/sketches/2019-08-14_mizar_alcor.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) AB: mit viel Schwarz zwischen den Beugungsscheiben (1“9) ../projects/double-stars/uwe-pilz/sketches/zetaUMa.jpg
Jörg S. Schlimmer
Germany
127mm (87x) easy to split ../projects/double-stars/joerg-schlimmer/sketches/Zeichnung_Alkor-Mizar_ausschnitt_filtered.jpg
Sarah Gebauer
Germany
150mm (83x) AB: einfacher, aber sehr schöner Doppelstern, Komponenten A und B mit 14,4'' Abstand stehen mit schönen Feldsternen zusammen im Bild ../projects/double-stars/sarah-gebauer/sketches/20200409%20Zeta%20UMa%20DSk.jpg
Robert Zebahl
Leipzig (Germany)
../projects/double-stars/robert-zebahl/photographs/2020-04-06_zeta_uma.jpg
Werner E. Celnik
Rheinberg (Germany)
120mm ../projects/double-stars/werner-celnik/photographs/zetaUMa%202001-07-01%202130UT%20Refr_120-2000%20Fuji100%203s%20A8076%20kl.jpg
BUP150, alp Vir AC 1m0 10m5 366.6'' 61° 1999 Vir 13h25m11.58s -11°09'40.40"
René Merting
Drachhausen (Germany)
100mm (64x) bei 64x ist C ostnordöstlich vom gleißend hellen Stern Spica zu erkennen - C steht gerade so sichtbar am Rand des Strahlkranzes
STF1747 9m3 10m2 14.9'' 345° 2015 CVn 13h27m45.73s +47°45'32.20"
Robert Zebahl
Leipzig (Germany)
70mm (44x) 2020-04-20: Easy to separate. The primary component appeared slightly orange with a noticeably fainter companion.
STF1746 7m7 10m7 22.8'' 246° 2015 Vir 13h28m09.72s +09°27'40.10"
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/STF%201746.png
STT266 8m0 8m4 2.0'' 358° 2018 Com 13h28m26.68s +15°42'30.50"

../images/binary-star-orbits/STT266-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (333x) ~0.5 delta mag, ~2 separation, nice looking pair
Mark McCarthy
Fremont (California/USA)
317mm (553x) Close 2" near equal white. Period of 1954.11 years. Near its closest separation now (May 2017), will be ~4" by the year 2822.
STF1752 AB 8m2 9m9 1.0'' 107° 2017 UMa 13h28m49.82s +59°55'41.70"

../images/binary-star-orbits/STF1752-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange star perhaps a little elongated, tough.
STF1750, 72 Vir 6m1 10m7 30.1'' 17° 2015 Vir 13h30m25.72s -06°28'13.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 72 Vir: Wide split, yellow-white A and ~10th mag B, 3 delta mag.
STT268, FK Com AB 7m7 13m0 19.1'' 78° 2015 Com 13h30m52.21s +24°14'15.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint wide B, bluish. Averted vision best, and with seeing.
STF1755 7m3 8m1 4.1'' 133° 2018 CVn 13h32m21.99s +36°49'05.60"
Robert Zebahl
Leipzig (Germany)
70mm (67x) At 31x just separable, extremely tight. At 44x clearly separated, but still close, relatively dim pair with moderate difference in brightness. At 67x and 100x well separable. The primary component appeared slightly orange.
René Merting
Drachhausen (Germany)
100mm (64x) bei 64x ein extrem eng stehendes Paar - B im SO ist maximal eine halbe Größenklasse schwächer als A - beide spielen Braut in ihren reinweißen Kleidern
Mark McCarthy
Fremont (California/USA)
317mm (277x) Pretty orange and blue, 5-6", 2 delta mag. Nice.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and blue, wide, 2 delta mag.
VYS6, VW Com 11m4 11m3 2.6'' 55° 2018 Com 13h32m44.59s +16°48'39.00"

../images/binary-star-orbits/VYS6-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) VW Com. Seen best with averted vision and when seeing stills. Close but pretty well split, ~2-3". Extremely faint reddish pair, PA NE.
★★ A567 6m2 9m7 1.4'' 254° 2018 Com 13h32m48.21s +24°20'48.30"
Christopher Hay
Seeheim (Germany)
150mm (96x) At a position angle of roughly 265° I had the feeling something was going on; a kind of protusion of the primary, coming and going. 200x: yes, now a stellar condensation kept popping in and out of sight at the same position, just on the outside of the first ring, which itself was coming and going in not-so-perfect seeing. Upping the magnification to 240x and 300x didn't improve the view.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Excellent pair, bright yellow-white A. B is resolved with seeing just beyond first diffraction ring, ~1.5"
Mark McCarthy
Fremont (California/USA)
317mm (553x) very faint B, very close, ~1" when seeing stills, 3-4 delta magnitude. Surprised it is not so difficult. B looks like it doesn't have any light of its own and is illuminated by A.
STT269 AB-C 6m8 9m2 123.7'' 332° 2015 CVn 13h32m51.02s +34°54'25.80"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Wide but pretty faint pair, 2 delta mag. Did not detect 0.3" AB
STF1758 8m7 8m9 3.3'' 291° 2015 CVn 13h32m51.51s +49°08'24.30"
Robert Zebahl
Leipzig (Germany)
70mm (67x) 2020-04-20: Clearly split, still relatively tight pair with little difference in brightness. The components appear slightly different in color: slightly orange, yellowish.
Mark McCarthy
Fremont (California/USA)
203mm (205x) Nice near equal pair, slightly yellow, ~5"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Nice near equal pair, slightly yellow, ~5"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Evenly matched yellow-orange pair ~4". Nice
STF1756 AB 9m9 10m4 14.7'' 177° 2016 Com 13h33m19.04s +23°00'51.00"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Blue-white stars, half delta mag, very wide
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide white pair, 0.5 delta mag.
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/STF%201756.png
STF1757 AB 7m8 8m8 1.7'' 143° 2018 Vir 13h34m16.38s -00°18'49.80"

../images/binary-star-orbits/STF1757-AB-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (200x) schwierig ../projects/double-stars/uwe-pilz/sketches/200516STF1757.jpg
Mark McCarthy
Fremont (California/USA)
203mm (205x) Close, ~2", a dull orange, ~1.5 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange-yellow, half a delta mag, pretty, ~1.5"
BU114 8m1 8m2 1.3'' 173° 2018 Vir 13h34m17.72s -08°37'07.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice near equal, slightly yellow white stars, ~10th mag. In 80mm finder it is shown with another widely separated equal pair.
HJ1234 AB 6m4 10m5 28.6'' 2008 CVn 13h34m21.87s +38°47'21.30"
Mark McCarthy
Fremont (California/USA)
317mm (277x) B a faint blue orb, looks like a planet reflecting A's light. Yellow A. Nice!
STF1760 8m8 9m1 8.7'' 64° 2018 Com 13h34m23.81s +26°16'34.00"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Wide white stars, near equal
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright white, pretty wide separation, equal magnitude.
S650 8m2 9m0 57.2'' 126° 2015 Vir 13h34m30.00s -13°26'05.50"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x komfortabel getrennt - Helligkeitsunterschied eine halbe Größenklasse- A wirkt grau, B ist weißbraun
BU932 AB 6m3 7m3 0.4'' 67° 2018 Vir 13h34m40.48s -13°12'51.50"

../images/binary-star-orbits/BU932-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (170x) Out of round with apodizing mask
AG190 9m6 9m8 2.6'' 13° 2017 CVn 13h35m38.82s +49°39'21.70"
Robert Zebahl
Leipzig (Germany)
70mm (80x) 2020-04-20: Pretty faint double star. At 80x still very tight pair with little difference in brightness. Not very attractive.
25 CVn STF1768 AB 5m0 7m0 1.7'' 99° 2018 CVn 13h37m27.70s +36°17'41.40"
STF1768 AC 5m0 11m6 214.3'' 321° 2015
KZA73 AD 5m0 13m0 335.6'' 92° 2015
KZA73 AE 5m0 12m7 369.5'' 139° 2015
KZA73 AF 5m0 9m4 437.3'' 118° 2015

../images/binary-star-orbits/STF1768-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
60mm (160x) AB: 2020-03-16: 102/1122mm ED refractor stopped down to 60mm. The diffraction ring of the primary component is virtually invisible. The companion appears only in few moments as an extremely faint, elongated brightening in the diffraction ring. Very difficult. Telescope should be in very good optical condition!
Robert Zebahl
Leipzig (Germany)
70mm (160x) AB: 2020-03-16: 102/1122mm ED refractor stopped down to 70mm. Companion only visible as a subtle, elongated, not permanently visible brightening. The diffraction ring of the primary component is only visible occasionally. Difficult. Telescope should be in good optical condition!
Robert Zebahl
Leipzig (Germany)
80mm (160x) AB: 2020-03-16: 102/1122mm ED refractor stopped down to 80mm. Companion permanently visible as elongated brightening in the diffraction ring. But the diffraction ring itself appears rather faint. Moderately difficult.
Robert Zebahl
Leipzig (Germany)
90mm (160x) AB: 2020-03-16: 102/1122mm ED refractor stopped down to 90mm. Companion quite clearly recognizable as elongated brightening in diffraction ring. Relatively simple.
Robert Zebahl
Leipzig (Germany)
102mm (160x) AB: 2020-03-16: The faint companion is immediately recognizable as a distinct, slightly elongated brightening in the diffraction ring. Easy.
Robert Zebahl
Leipzig (Germany)
152mm (150x) AB: 2020-03-19: At 150x the clearly fainter companion is visible as a roundish brightening. Due to the chromatic aberration of the achromat (152mm f/5.9) the companion is almost outshined. At 180x the companion is then well, at 225x and 300x very well visible as a tiny separated star.
Mark McCarthy
Fremont (California/USA)
203mm (205x) AB: Very tight pair, a little more than hairline split, ~2 delta mag.
Mark McCarthy
Fremont (California/USA)
203mm (205x) AB: Very tight pair, a little more than hairline split, ~2 delta mag. 8" 333x: white and dull blue, ~1", Nice!
Mark McCarthy
Fremont (California/USA)
203mm (333x) AB: White and dull blue, ~1" Nice!
Frederik Wanink
Itterbeck (Germany)
254mm (640x) AB: schwierig wegen Helligkeitsunterschied ../projects/double-stars/frederik-wanink/sketches/25CVn.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB: Very pretty pale yellow and orange, 2-3 delta mag, ~2"
STF1763 AB 7m8 8m1 2.7'' 39° 2017 Vir 13h37m35.30s -07°52'16.60"
René Merting
Drachhausen (Germany)
100mm (107x) bei 64x zeigt sich in guten Momenten eine schöne 8 - bei 107x ein schönes enges, knapp getrenntes Paar zweier gleich heller Sterne
Mark McCarthy
Fremont (California/USA)
317mm (553x) 81 Vir: near equal orange stars, ~3", 9th mag. Nice!
STF1770 6m9 8m2 1.8'' 128° 2017 UMa 13h37m42.92s +50°42'53.50"
Mark McCarthy
Fremont (California/USA)
317mm (443x) Tight light orange pair, 2 delta mag, ~1".
STF1764 AB 6m8 8m6 15.9'' 32° 2017 Vir 13h37m44.01s +02°22'56.50"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Orange and 2x fainter blue, wide. Another equal wide pair to the south.
STF1769 AC 7m9 9m3 56.2'' 259° 2015 CVn 13h38m01.95s +39°10'41.00"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein weit auseinander stehendes Pärchen - B im Westen ist eine Größenklasse schwächer als die weiße Komponente A und wirkt gegen A richtiggehend blaugrau
Mark McCarthy
Fremont (California/USA)
203mm (333x) Wide separated blue stars, half delta mag.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Wide separated blue stars, half delta mag. 2+1 system? 1 delta mag fainter star quite more widely separated. (Sextuple system. I missed the 1.6" AB, need to re-observe; saw the AC pair only -- the fainter star noticed may be part of the system.)
STF1774 6m3 10m5 17.3'' 135° 2015 UMa 13h40m23.35s +50°31'09.40"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Wide white and blue 3 delta mag.
STF1772, 1 Boo AB 5m8 9m6 4.4'' 134° 2017 Boo 13h40m40.50s +19°57'20.40"
AC 5m8 12m2 87.5'' 26° 2015
AD 5m8 7m4 208.4'' 2010
Robert Zebahl
Leipzig (Germany)
70mm (22x) AD: 2020-04-24: Very widely split with clearly visible difference in brightness. The primary component appeared white-yellowish, the companion pale orange.
Christopher Hay
Seeheim (Germany)
80mm (63x) AB: B pops in and out of view as a very fine pinprick of light reasonably well set off from A. No success at 50x.
Christopher Hay
Seeheim (Germany)
150mm (96x) AB: Well split. Remarkably easy considering the 4-mag difference in brightness. A seems dusky yellow. B perhaps bluish, but hard to determine. 9-mag star a few arcminutes to the north makes the view even more pleasing. According to Stelledoppie AB is a physical double.
Mark McCarthy
Fremont (California/USA)
203mm (333x) AB: 1 Boo. Odd colors. Blue-white to greenish stars, wide, about 3 delta mag. AC is the very faint star well separated at nearly a right angle PA from the AB pair
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Bright white and 3-4 delta magnitude reddish B, 4-5" to SW.
Karsten Kopp
Köln (Germany)
600mm (180x) AB: Im CLT bei 180 x kein Problem. Der Reiz hier macht den größeren Helligkeitsunterschied von knapp 4 mag aus. Auch die Farben, der hellere erstrahlt eher weiß und der schwächere schwach rotbraun, sind schön anzusehen.
Berthold Fuchs
Wiesbaden (Germany)
130mm AB: difficult DS ../projects/double-stars/berthold-fuchs/photographs/STF%201772.jpg
STF1776 9m4 9m4 7.3'' 19° 2015 CVn 13h41m47.70s +46°13'11.20"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Near equal white, well split
★★ STF1777, 84 Vir 5m5 8m3 2.7'' 227° 2015 Vir 13h43m03.71s +03°32'16.40"
Uwe Pilz
Leipzig (Germany)
105mm (200x) deutliche Aufhellung im 1. Ring, nicht sonderlich schwierig ../projects/double-stars/uwe-pilz/sketches/200516_84Vir.jpg
Mark McCarthy
Fremont (California/USA)
203mm (333x) Light orange and blue-green B, large magnitude difference, ~3". Pretty.
Gerd Kohler
Langenzenn (Germany)
254mm (218x) Blasses rot - eventuell rötlich. Enges Paar. Deutlicher Helligkeitsunterschied.
STF1775 AB 7m2 10m1 27.7'' 336° 2012 Vir 13h43m30.35s -04°16'28.10"
Mark McCarthy
Fremont (California/USA)
317mm (340x) a pretty pairing of a bright orange A and a faint bluish B widely separated.
STF1779 9m3 10m4 3.8'' 145° 2015 Boo 13h44m33.98s +23°40'06.00"
Mark McCarthy
Fremont (California/USA)
203mm (333x) ~2 delta mag, wide, ~4"
BU115 AC 7m5 13m2 107.3'' 169° 2015 Boo 13h45m20.87s +09°03'28.60"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Slightly orange and very wide separated, much fainter bluish star just visible. Did not notice AB 1.6" 10.4 mag.
WNC5 10m2 10m3 4.0'' 164° 2017 Vir 13h45m32.62s -03°00'59.00"
René Merting
Drachhausen (Germany)
320mm (72x) bei 72x sehe ich zwei kleine Kullerchen, die sich noch ganz knapp berühren und sich in guten Momenten getrennt zeigen - bei 144x ist die Trennung dann eindeutiger - beide Komponenten sind gleich hell
86 Vir BU935 AB 5m7 8m5 1.0'' 304° 2001 Vir 13h45m56.33s -12°25'35.60"
STF1780 AC 5m7 11m9 27.3'' 163° 2000
STF1780 CD 11m9 13m1 2.4'' 272° 1958
Mark McCarthy
Fremont (California/USA)
317mm (340x) STF1780 (AC): 86 Virginis.brighter A and very faint, almost averted vision B widely separated.
Mark McCarthy
Fremont (California/USA)
317mm (553x) BU935 (AB): 86 Vir: Pretty orange star but @ 553x seeing wont allow split of 3 delta mag, 1.2" B. 27" away is equal 11th mag CD pair which I see as a grey smudge
STF1781, HT Vir AB 7m9 8m1 1.0'' 195° 2017 Vir 13h46m06.75s +05°06'56.10"

../images/binary-star-orbits/STF1781-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (333x) White A and slightly yellow B, ~2", half delta mag
LDS3101 6m4 10m2 488.5'' 105° 2015 Vir 13h46m57.12s +06°21'01.40"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Light yellow A and very much fainter B, 4-5 delta mag., B is just detectable at this aperture Well separated.
S654 AB 5m6 8m9 71.3'' 239° 2018 CVn 13h46m59.77s +38°32'33.70"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein weit getrenntes Pärchen - B im Südwesten ist deutlich schwächer und farblos ggü. der weiß strahlenden Komponente A
Mark McCarthy
Fremont (California/USA)
317mm (277x) Striking yellow-orange and blue-green fainter B.
STF1785 7m4 8m2 2.8'' 190° 2019 Boo 13h49m04.00s +26°58'47.70"

../images/binary-star-orbits/STF1785-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (333x) Slightly orange-tinged white stars, near equal, well separated
Karsten Kopp
Köln (Germany)
600mm (180x) Im CLT bei 180 x Vergrößerung gut zu trennen. Leichter Helligkeitsunterschied und beider Sterne erscheinen gelborange.
STF1786 AB 8m9 10m3 11.0'' 22° 2015 CVn 13h49m38.98s +34°59'18.10"
Robert Zebahl
Leipzig (Germany)
70mm (44x) 2020-04-20: Nicely separated at an attractive distance and with a clear difference in brightness. The components appeared pale orange and greyish.
S656 6m9 7m4 86.2'' 209° 2018 Boo 13h50m23.51s +21°16'35.80"
Robert Zebahl
Leipzig (Germany)
8x40 2020-04-05: Wide, medium bright pair. Primary component appeared slightly orange, the companion greyish. The double star is in close vicinity to the star 6 Boo, which shines in a pale orange.
Robert Zebahl
Leipzig (Germany)
70mm (22x) 2020-04-24: Widely separated with little difference in brightness. Both components appeared slightly yellowish. Standing close to 6 Boo, which also shines in a slight yellow.
A568 10m2 11m2 2.6'' 321° 2017 Boo 13h52m27.03s +25°44'27.10"
Mark McCarthy
Fremont (California/USA)
203mm (333x) B is faint but easily detected, nice close pair
HJ1244 AB 6m9 10m8 6.9'' 130° 2015 CVn 13h53m20.79s +42°11'05.30"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Wow! Very faint B but can hold it direct vision with the seeing. Well separated from and orange-yellow A.
STF1789 8m6 9m0 6.7'' 328° 2015 CVn 13h54m05.19s +32°49'35.20"
Robert Zebahl
Leipzig (Germany)
70mm (31x) 2020-04-20: At 22x clearly visible as figure '8' and almost separated. At 31x fine separation of the still close pair. A slight difference in brightness and color is visible: white-yellowish, yellowish-orange.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Pretty equal magnitude white, well separated.
Berthold Fuchs
Wiesbaden (Germany)
130mm difficult DS ../projects/double-stars/berthold-fuchs/photographs/STF%201789.png
STF1887 9m2 11m2 3.3'' 226° 2013 UMi 13h54m57.46s +87°23'44.10"
Mark McCarthy
Fremont (California/USA)
203mm (333x) A star yellow, messy with seeing, B nice light blue and clean.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Izar. A yellow, messy with seeing. B nice light blue and clean.
STF1788 AB 6m7 7m3 3.7'' 101° 2018 Vir 13h54m58.20s -08°03'31.90"

../images/binary-star-orbits/STF1788-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (47x) Very nice view! Pretty tight together with a moderate difference in brightness.
René Merting
Drachhausen (Germany)
100mm (64x) bei 107x zeigt sich ein schönes, knapp getrenntes Pärchen - B im Osten ist nur knapp schwächer als A - Komponente A ist weiß, B ist grau, wirkt aber auch leicht gelb gefärbt - zurück auf 64x kann ich die beiden Sterne auch schon knapp getrennt erkennen
Mark McCarthy
Fremont (California/USA)
317mm (340x) bright pair of near equal magnitude, both yellow-while color.
BU30 8m8 11m8 8.0'' 199° 2015 Boo 13h58m07.43s +19°27'29.80"
Mark McCarthy
Fremont (California/USA)
203mm (333x) B seen with averted vision, wide
STF1793 7m5 8m4 4.8'' 243° 2019 Boo 13h59m05.25s +25°48'57.60"
René Merting
Drachhausen (Germany)
100mm (64x) bei 32x kleben beide Komponenten noch aneinander - bei 64x knapp und bei 107x dann gut getrennt - die B-Komponente westlich ist gut eine Größenklasse schwächer
Mark McCarthy
Fremont (California/USA)
203mm (333x) White stars, widely separated, ~1.5 delta mag. Nice pair
Karsten Kopp
Köln (Germany)
600mm (180x) Im CLT bei 180 x kein Problem. Der schwächere Stern leuchtet bläulich und der hellere eher gelblich weiß.
Berthold Fuchs
Wiesbaden (Germany)
130mm close DS ../projects/double-stars/berthold-fuchs/photographs/STF%201793.png
STF1794 9m5 9m7 2.0'' 126° 2016 Boo 13h59m48.26s +19°52'57.80"
Mark McCarthy
Fremont (California/USA)
203mm (333x) ~1 delta mag, well separated ~2", nice pair
SHJ171, tau Vir AB 4m2 9m4 82.4'' 289° 2017 Vir 14h01m38.78s +01°32'40.50"
René Merting
Drachhausen (Germany)
18x70 Komponente B ist mit komfortablem Abstand nordwestlich von A erkennbar - A ist reinweiß, B ist ein farbloser Punkt
A1097 & STF1800 A1097 AB 9m1 8m2 0.4'' 259° 2016 UMa 14h02m00.60s +57°13'28.60"
STF1800 AB-C 7m8 10m4 28.4'' 20° 2015

../images/binary-star-orbits/A1097-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) A1097 (AB): Hair-split at best moments, half delta mag, <0.8". A fainter star likely in the system about 30" distant -- this is STF 1800 AB-C.
Mark McCarthy
Fremont (California/USA)
317mm (553x) STF1800 (AB-C): Faint star ~30" from A1097
A2064 9m6 11m0 1.1'' 177° 2016 Boo 14h03m24.63s +17°40'00.10"
Mark McCarthy
Fremont (California/USA)
203mm (533x) Elongated at 333x, split with a lot of smearing of the image due to poor transparency with 533x. Tough but worth the effort
BGH50 7m0 8m9 97.0'' 32° 2015 Boo 14h04m45.95s +25°49'03.90"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Finder split. Wide pair, 2 delta mag, dull white. Viewed 8" 205x, no apparent other doubling.
Mark McCarthy
Fremont (California/USA)
203mm (205x) 13x80mm finder split. Wide pair, 2 delta mag, dull white. Viewed 8" 205x, no apparent other doubling
STT274 7m1 10m5 12.9'' 51° 2018 CVn 14h06m41.61s +34°46'42.80"
Robert Zebahl
Leipzig (Germany)
70mm (133x) 2020-04-20: At 100x and 133x no signs of the faint companion visible.
STT276 AB 8m9 9m4 0.4'' 207° 2016 Boo 14h08m11.84s +36°44'56.60"
AB-C 8m5 10m6 9.5'' 72° 2015
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Marginal elongation to rod
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB-C: 1 delta mag, ~5"
STF1804 8m2 9m3 4.7'' 13° 2019 Boo 14h08m15.53s +21°11'34.90"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Easy ~1.5 delta mag, wide pair, white stars
STT275 7m3 10m1 5.0'' 354° 2015 Vir 14h09m11.21s +07°23'05.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange star with very faint B, 3-4 delta mag, wide ~10". Nice!
STF1805 9m0 9m2 4.9'' 34° 2018 Vir 14h09m57.24s +04°00'56.40"
Berthold Fuchs
Wiesbaden (Germany)
130mm close DS ../projects/double-stars/berthold-fuchs/photographs/STF%201805.png
STF1808 AB 8m8 9m6 2.5'' 82° 2019 Boo 14h10m07.76s +26°35'58.10"
Mark McCarthy
Fremont (California/USA)
203mm (333x) ~1.5 delta, wide white stars
STF1812 AB-C 7m9 9m4 14.1'' 108° 2015 Boo 14h12m26.68s +28°43'02.30"
René Merting
Drachhausen (Germany)
18x70 mit etwas Geduld zeigt sich C sehr schwach und knapp abgesetzt östlich von AB - nur mit hoher Konzentration, aber machbar
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x ist die C-Komponente östlich knapp getrennt von AB gerade so erkennbar - bei 32x dann schön getrenntes Pärchen, C-Komponente deutlich schwächer, vielleicht 2 mag weniger
Mark McCarthy
Fremont (California/USA)
203mm (205x) 2.5 delta mag, pretty wide. There's a third, fainter pair about 4x out from the other separation
Mark McCarthy
Fremont (California/USA)
203mm (205x) A 2+1 system with AB-D. Main pair 2.5 delta mag, pretty wide. The third, fainter pair about 4x the other separation.
STF1820 9m1 9m4 2.8'' 123° 2019 UMa 14h13m00.76s +55°19'31.10"

../images/binary-star-orbits/STF1820-orbit.jpg

René Merting
Drachhausen (Germany)
320mm (144x) bei 72x ist ein Stäbchen mit einer angedeuteten Einschnürung erkennen - bei 144x sind beide Komponenten getrennt voneinander sichtbar - beide sind gleich hell
STF1813 8m4 8m6 4.6'' 193° 2019 Vir 14h13m24.23s +05°24'03.20"
Berthold Fuchs
Wiesbaden (Germany)
130mm close DS ../projects/double-stars/berthold-fuchs/photographs/STF%201813.png
BU224 8m9 9m3 0.6'' 101° 2016 Boo 14h13m26.94s +12°34'26.20"

../images/binary-star-orbits/BU224-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (333x) Hairline split with seeing, light yellow-white stars, noticeable mag difference. Snowman when seeing is not stable
STF1821, kappa Boo, 17 Boo, Asellus Tertius AB 4m5 6m6 13.7'' 236° 2017 Boo 14h13m29.00s +51°47'23.80"

../images/binary-star-orbits/STF1821-AB-orbit.jpg

René Merting
Drachhausen (Germany)
18x70 Komponente A strahlt so hell, dass B deutlich schwächer ganz knapp im SW von A abgesetzt sichtbar ist - Helligkeitsunterschied schätzungsweise 3 Magnituden (nur 2.09 mag laut Stelle Doppie)
Robert Zebahl
Leipzig (Germany)
70mm (22x) 2020-04-24: Clearly separated with significant difference in brightness. The primary component showed a pale yellowish-orange color with a greyish companion. To the southeast there is the double star STFA 26.
Uwe Pilz
Leipzig (Germany)
105mm (144x) weiß-grau, trennbar bei 22x
Karsten Kopp
Köln (Germany)
600mm (180x) Im CLT leicht zu trennen. Beider Sterne erscheinen weißlich.
STT279 6m8 9m1 2.2'' 257° 2018 Boo 14h13m49.46s +11°59'51.90"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Fine pair, white A and slightly peach color B, ~2" separated and ~3 delta mag
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very pretty orange and blue, 2-3", PA SW 2 delta mag
STF1816 7m4 7m8 0.4'' 99° 2016 Boo 14h13m54.63s +29°06'19.50"

../images/binary-star-orbits/STF1816-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (88x) gelb ../projects/double-stars/uwe-pilz/sketches/stf1816.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Rod-shaped equal white. July 2017
KUI66, 15 Boo 5m4 8m4 0.8'' 111° 2015 Boo 14h14m50.85s +10°06'02.20"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Light orange and two possible pairs, both very faint on the edge of detection. One closer but still visible, very wide.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Using apodizing mask I had a glimpse of the B star 15% of the time, very small and faint, ~3" and 4-5 delta mag. Both orange.
STF1829 8m1 8m6 5.6'' 151° 2019 Boo 14h15m27.95s +50°26'24.60"
Uwe Pilz
Leipzig (Germany)
105mm (144x) einfach
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal white wide.
★★ A1101 AB 9m7 10m3 0.3'' 224° 2018 Boo 14h15m50.57s +10°17'59.30"

../images/binary-star-orbits/A1101-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (1067x) I stared for a long time and had brief instants of an elongation or bump, and even a tentative split of a star. Sketched the orientation will check the PA later [I think I have it. My orientation on the sketch is in the correct position as in relation to the AB-C & AB-D pairs.]
★★ STF1830 & STF1831 STF1831 AB 7m2 9m6 5.8'' 138° 2017 UMa 14h16m08.47s +56°42'45.70"
STF1831 AC 7m2 6m7 112.2'' 219° 2017
STF1831 CD 6m7 13m1 112.1'' 116° 2016
STF1830 CE 6m7 9m3 138.0'' 245° 2016
STF1830 EF 9m3 10m3 10.6'' 312° 2017
STF1830 EG 9m3 12m2 35.2'' 81° 2017
Christopher Hay
Seeheim (Germany)
7x45 STF1831 (AC): Wide split at 7x but still a very distinct impression of being a double. No colour impression. Two fine pinpricks of light, rather attractive in 8° FOV.
According to Stelledoppie the A-C pair, at 509 light years distance to us, is the only physical pair in the whole STF 1830/1831 comples. A nice physical double for small binoculars.
Robert Zebahl
Leipzig (Germany)
8x40 STF1831 (AC): 2020-04-05: Fairly wide pair with slight differences in brightness and color. C appeared slightly orange, A on the other hand slightly bluish. Comparatively bright double star, which gives a nice view.
Robert Zebahl
Leipzig (Germany)
55mm (27x) STF1831 (AC): 2020-04-05: Moderate difference in brightness. C: pale orange, A: subtle blue.
Robert Zebahl
Leipzig (Germany)
70mm (57x) 2020-04-11: At 22x the components AB, C, E & F are well visible and widely separated. E & F are comparatively faint. The C component in the middle appeared white-yellowish, AB rather white with a slight tendency to blue. At 57x, the pair AB with a clear difference in brightness can be easily split. An altogether rewarding and unusual multiple system. ../projects/double-stars/robert-zebahl/sketches/2020-04-11_stf1830_stf1831.jpg
Uwe Pilz
Leipzig (Germany)
105mm (88x) Komponente G erforderte 200x ../projects/double-stars/uwe-pilz/sketches/200411stf1830.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) STF1831 (AB): One pair close to another, 5" and 2 delta mag. Part of a widely separated equal pair, and a gang of three stars further away -- five additional pairings in the system.
René Merting
Drachhausen (Germany)
320mm (72x) EF: bei 72x ein schwaches Sternpaar, gut getrennt - E ist gelblich, F eine halbe Größenklasse schwächer und grau
EG: bei 72 ist nordöstlich von EF noch ein ganz schwacher Lichtpunkt erkennbar - G hat ungefähr mit dreifachem Abstand EF
René Merting
Drachhausen (Germany)
320mm (72x) AB: bei 144x ist B ein bisschen mehr als knapp getrennt im SO von A erkennbar - B ist deutlich schwächer und grau gegen den weißgelblich strahlenden A - zurück auf 72x kann ich die beiden auch noch extrem knapp getrennt erkennen in guten Momenten - ein schönes Doppel zusammen mit STF1830 EF
AC: bei 72x fällt die helle Komponente C im Südwesten von AB zwar auf, ich hätte aber nicht vermutet, dass der Stern dazu gehört
STFA26, iota Boo, 21 Boo AB 4m8 7m4 38.9'' 33° 2017 Boo 14h16m10.07s +51°22'01.30"
Robert Zebahl
Leipzig (Germany)
8x40 2020-04-05: Even with tripod the faint companion was not visible.
René Merting
Drachhausen (Germany)
18x70 ein schönes ungleiches Paar, aber Komponente B ist deutlich besser abgesetzt von A erkennbar als beim Nachbar-DS STF1821 - leichter Farbkontrast
Robert Zebahl
Leipzig (Germany)
70mm (22x) 2020-04-24: Similar view to the northwest standing kappa Boo. Nicely separated with larger distance and fainter companion. The primary component appeared rather white.
Uwe Pilz
Leipzig (Germany)
105mm (144x) sehr weit, auffallend bei 22x
HWE32 9m9 10m6 4.6'' 194° 2018 Boo 14h16m15.42s +23°21'38.50"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Surprisingly easy, two delta and fairly wide
STF1825 6m5 8m4 4.2'' 154° 2019 Boo 14h16m32.84s +20°07'18.70"

../images/binary-star-orbits/STF1825-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (333x) Cream white A and light blue B, wide ~5", ~2 delta mag
Mark McCarthy
Fremont (California/USA)
317mm (277x) White and orange, 3 delta mag, well split.
BU1441 10m1 11m6 3.6'' 80° 2017 Boo 14h16m35.81s +23°28'36.30"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Fine if faint pair, wide ~4", ~2 delta mag, bluish color due to their faintness
STF1828 10m4 10m8 2.1'' 159° 2018 Boo 14h16m58.35s +24°11'33.40"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Very nice faint near equal pair, a bit hazy until seeing stills then very fine bluish points resolve
ENG51, 18 Boo 5m4 10m8 164.0'' 219° 2015 Boo 14h19m16.28s +13°00'15.50"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Very wide faint blue star to the south, 5 delta mag.
STF1834 8m1 8m3 1.6'' 104° 2018 Boo 14h20m17.60s +48°30'25.10"

../images/binary-star-orbits/STF1834-orbit.jpg

Robert Zebahl
Leipzig (Germany)
120mm (150x) At 108x elongated, at 150x barely split with similarly bright components.
STT281 7m7 9m7 1.5'' 166° 2017 Boo 14h20m20.85s +08°34'56.30"
Uwe Pilz
Leipzig (Germany)
105mm (200x) der Begleiter ist schwach und schwierig ../projects/double-stars/uwe-pilz/sketches/191129stf281.jpg
Mark McCarthy
Fremont (California/USA)
203mm (333x) Very fine, but well split, huge delta mag, surprise!
★★ STF1835 & BU1111 STF1835 A-BC 5m0 6m8 6.2'' 196° 2018 Boo 14h23m22.74s +08°26'47.90"
BU1111 BC 7m4 7m7 0.3'' 16° 2018

../images/binary-star-orbits/BU1111-BC-orbit.jpg

René Merting
Drachhausen (Germany)
100mm (64x) STF1835 (A-BC): bei 32x erscheint der Stern leicht unrund, verschmiert - bei 107x präsentiert sich BC gut getrennt im Süden von A - Helligkeitsunterschied eine Größenklasse (1.75 mag laut Stelle Doppie) - bei 64x sind beide Sterne auch getrennt erkennbar, BC strahlt warmweiß
Robert Zebahl
Leipzig (Germany)
102mm (62x) STF1835 (A-BC): At 28x barely split with visible difference in brightness. At 62x easy to separate. The colors seemed similar.
Mark McCarthy
Fremont (California/USA)
203mm (333x) STF1835 (A-BC): Yellow A and slightly yellow B, wide. Did not notice BU1111 BC, 0.3" 7.4/7.7
Mark McCarthy
Fremont (California/USA)
317mm (277x) STF1835 (A-BC): In a line of three stars, white and slightly red B. Wide, ~6", 2 delta mag. Did not detect BC 0.3"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) BU1111 (BC): Short period pair, it is a component of STF 1835. I get a nothed near equal elongation with a clear direction in relation to the A star. Very cool
Karsten Kopp
Köln (Germany)
600mm (180x) STF1835 (A-BC): Doppelstern konnte im CLT gut getrennt werden. Helligkeitsunterschied ist merklich, aber nicht extrem. Der hellere erscheint eher weißlich und der kleinere eher bläulich. Der Farbunterschied ist aber minimal.
Berthold Fuchs
Wiesbaden (Germany)
130mm STF1835 (A-BC): close DS ../projects/double-stars/berthold-fuchs/photographs/STF%201835.jpg
STF1838 7m5 7m7 9.7'' 335° 2017 Boo 14h24m05.76s +11°14'49.10"
Robert Zebahl
Leipzig (Germany)
70mm (44x) 2020-04-24: At 22x small, fine and remarkable double star with small difference in brightness, at 44x with visible color difference: orange & white-bluish.
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x sind flüchtig zwei kleine sich berührende Perlchen zu erkennen - etwas genauer betrachtet, können beide Sterne getrennt gesehen werden - B im NW ist nur knapp schwächer - ein schönes Pärchen ohne Konkurrenz im Umfeld
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/STF%201838.jpg
STF1843 AB 7m7 9m2 19.8'' 186° 2018 Boo 14h24m38.91s +47°49'50.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty wide, 3 delta mag.
STT580, the Boo 4m1 11m5 69.7'' 182° 2015 Boo 14h25m11.79s +51°51'02.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 23 Boo, Theta Boo. Very bright A with very faint B, wide.
BU1442 AB 9m9 10m2 45.2'' 74° 2017 Boo 14h25m43.56s +23°36'59.90"
AC 9m9 9m7 75.2'' 61° 2017
AD 9m9 13m1 250.0'' 285° 2016
CP 9m7 14m7 56.1'' 182° 2017
René Merting
Drachhausen (Germany)
10x50 das Dreifachsystem ist auszumachen als leicht länglicher Nebelstrich - in guten Momenten ist indirekt eine Zweiteilung erkennbar, vermutlich eine Trennung A-BC
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x sind alle drei Komponenten direkt erkennbar - die mittlere Komponente B steht leicht südlich versetzt und scheint der schwächste von den Dreien zu sein - bei 32x sind alle drei Sterne gut getrennt und C steht näher zu B als A - Farbe ist nicht wirklich feststellbar, aber der C strahlt ein wenig klarer (nicht heller), A und B wirken etwas dumpfer, fast so als würden sie zum Orange tendieren
René Merting
Drachhausen (Germany)
320mm (45x) bei 45x strahlen alle drei Sterne kupfern bzw. dunkel - bei 70x haben alle die gleiche Helligkeit, der östliche Stern strahlt nicht heller aber weißer - die Sterne wirken im Vergleich zu den übrigen Sternen im Gesichtsfeld, als hätten sie Farbe
HO542 10m3 10m3 0.9'' 35° 2017 Boo 14h27m33.26s +20°37'07.20"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Faint near equal, very finely split with seeing, bluish stars
HO543 9m6 9m7 4.6'' 237° 2019 Boo 14h27m54.80s +21°22'33.90"
Mark McCarthy
Fremont (California/USA)
203mm (333x) White stars, near equal, wide ~5"
STF1850 7m1 7m6 25.2'' 263° 2018 Boo 14h28m33.29s +28°17'25.90"
Robert Zebahl
Leipzig (Germany)
8x40 2020-04-05: Separated, but still quite close together with a moderate difference in brightness.
René Merting
Drachhausen (Germany)
16x70 ein gut getrenntes Paar zweier gleich heller Sterne - beide weiß
Robert Zebahl
Leipzig (Germany)
70mm (22x) 2020-04-24: Easily separated, medium bright with rather small difference in brightness and moderate distance. Fairly conspicuous. The components appeared white-yellowish and white-bluish. Beautiful double star.
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x locker getrennt - Komponente B ist vielleicht eine halbe Magnitude schwächer als A und strahlt ein wenig dumpfer bzw. weniger weiß
Mark McCarthy
Fremont (California/USA)
203mm (205x) Very wide, 1/2 delta mag.
Mark McCarthy
Fremont (California/USA)
203mm (205x) Very wide, half delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide yellow-white, 1 delta mag.
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/STF%201850.jpg
STF1854 AB 6m0 10m6 26.1'' 256° 2015 Boo 14h29m49.66s +31°47'28.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright blue-white A, faint pair to the west, wide
BU1443 6m2 10m6 55.7'' 195° 2017 Vir 14h30m45.39s +04°46'20.20"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Light yellow-orange A and much fainter blue B, wide separation.
BU117 AB 8m4 9m4 1.4'' 74° 2017 Lib 14h31m19.74s -15°38'19.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Well split, 0.5 delta mag, ~1.5”.
HJ2728, rho Boo 3m6 11m5 33.8'' 343° 2017 Boo 14h31m49.86s +30°22'16.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide blue faint B to bright orange A. PA to west, 4-5 delta mag.
HU140 9m5 10m1 1.4'' 196° 2016 Lib 14h32m32.68s -13°00'14.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Seeing not quite good enough, need more darkness, and it’s near Jupiter. I can see an elongated smear, averted vision brightens but does not split.
STF1858 AB 8m1 9m0 3.0'' 38° 2019 Boo 14h33m36.45s +35°35'08.00"
AC 8m1 14m3 19.7'' 335° 2013
AD 8m1 14m7 36.6'' 322° 2013

../images/binary-star-orbits/STF1858-AB-orbit.jpg

René Merting
Drachhausen (Germany)
100mm (142x) AB: bei 64x ein extrem dicht stehendes Pärchen, Trennung fast greifbar - bei 142x stehen die Sterne noch immer sehr eng, die Trennung ist nun aber eindeutig - Komponente B im NO ist etwas schwächer - beide Sterne leicht gelblich, hin und wieder mit Farbkontrast in Richtung orange
Uwe Pilz
Leipzig (Germany)
105mm (288x) AB: nicht getrennt
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Near equal orange 3-4"
Mark McCarthy
Fremont (California/USA)
317mm (553x) AC: 13th magnitude, a wide pair? Seen with averted vision, comes and goes with seeing
STT582, sig Boo AB 4m5 10m7 214.5'' 85° 2015 Boo 14h34m40.81s +29°44'42.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very wide blue to east?
STF3087 AB 10m6 10m7 2.3'' 222° 2018 Boo 14h36m15.39s +19°24'22.30"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Nice pair ~4" separation, hardens with seeing to points, bluish. [Missed ITF 140 AC and BC, 10.6 mag and 4" and 7.6"]
STF1863 7m7 7m8 0.6'' 63° 2018 Boo 14h38m00.71s +51°34'42.10"

../images/binary-star-orbits/STF1863-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) gerade trennbar ../projects/double-stars/frederik-wanink/sketches/STF1863.jpg
STF1864, pi 1 Boo AB 4m9 5m8 5.4'' 113° 2019 Boo 14h40m43.56s +16°25'05.90"
Robert Zebahl
Leipzig (Germany)
70mm (31x) 2020-04-24: At 22x immediately visible as figure '8' with visible difference in brightness. Beside omicron Boo there are no other brighter stars in the nearer surroundings. At 31x cleanly split, but still close together with noticeable difference in brightness. Both components appear white. Beautiful sight. At 57x very nice with a slightly different color impression: white & dark yellow.
René Merting
Drachhausen (Germany)
100mm (64x) bei 32x eine 8, bei 64x dann knappe Trennung des Doppelsterns - Komponente B östlich ist nur leicht schwächer und erscheint mit einem zarten Stich ins Gelbe
Mark McCarthy
Fremont (California/USA)
203mm (333x) Pi 1 Boo. Very bright, ~1 delta mag, off white stars
Berthold Fuchs
Wiesbaden (Germany)
130mm close DS ../projects/double-stars/berthold-fuchs/photographs/pi%20Bootis.png
STF1867 8m4 8m8 0.7'' 355° 2017 Boo 14h40m44.21s +31°17'23.50"

../images/binary-star-orbits/STF1867-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) 0.5 delta mag, hair to figure 8 split, white.
STF1872 AB 7m5 8m3 7.4'' 50° 2019 Dra 14h41m00.84s +57°57'28.10"

../images/binary-star-orbits/STF1872-AB-orbit.jpg

René Merting
Drachhausen (Germany)
320mm (45x) bei 45x ist die B-Komponente nordöstlich über A erkennbar, ein Blatt Papier passt zwischen die beiden - leichter Farbunterschied - bei 72x zeigt sich ein gut getrenntes Pärchen, B ist eine dreiviertel Magnitude schwächer und blauweiß, A ist gelbweiß
Karsten Kopp
Köln (Germany)
600mm (180x) Doppelstern ist gut zu trennen. Helligkeitsunterschied ist erkennbar, aber nicht besonders auffällig. Der hellere Stern erscheint weißgelblich und der schwächere gelblich.
★★ zeta Boo STF1865 AB 4m5 4m5 0.3'' 283° 2018 Boo 14h41m08.92s +13°43'42.00"
H6 104 AB-C 4m5 11m0 104.3'' 260° 2015

../images/binary-star-orbits/STF1865-AB-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (88x) AB-C ../projects/double-stars/uwe-pilz/sketches/zetaBoo.jpg
Mark McCarthy
Fremont (California/USA)
508mm (1067x) AB: Zeta Boo. Short period. First impression was moderately well notched overlapping disks (eg. not barely notched, but not strongly notched either). With more time observing & getting used to the image, and in moments of better seeing, the notch became more distinct. It would not separate in spite of moments of better seeing. I could also see the elongation, but only subtly notched due to the smaller scale, at 667x
STF1878, DL Dra 6m3 9m2 4.2'' 314° 2015 Dra 14h42m03.25s +61°15'42.90"

../images/binary-star-orbits/STF1878-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (198x) starke Aufhellung im ersten Ring ../projects/double-stars/uwe-pilz/sketches/stf1878.jpg
★★ HU575 AB 9m8 10m1 0.5'' 152° 2011 Boo 14h42m33.63s +19°28'46.90"

../images/binary-star-orbits/HU575-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (1067x) Short period. Small, faint, but definite split of these orange-red near equal stars. I sketched a clear orientation to field stars. Awesome
A1109 AB 7m4 9m4 1.9'' 88° 2017 Vir 14h42m47.60s +06°35'26.40"

../images/binary-star-orbits/A1109-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (333x) Both stars light yellow, big magnitude difference, ~3-4 delta mag, about 2". Not difficult
STF1870 7m5 10m0 4.8'' 229° 2015 Boo 14h42m55.10s +08°04'34.30"
René Merting
Drachhausen (Germany)
100mm (213x) ich musste bis 213x hoch vergrößern, damit B sich überhaupt zeigt - nur ab und an ist die schwächere Komponente gut getrennt südwestlich von A zu erkennen
Mark McCarthy
Fremont (California/USA)
203mm (333x) Yellow A and very much fainter B, wide ~5"? 4 delta mag. B flashes to view with seeing
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and fairly faint blue B, ~5-6", 3 delta mag.
Karsten Kopp
Köln (Germany)
600mm (180x) Der Doppelstern konnte gut getrennt werden. Der große Helligkeitsunterschied von 2,5 mag ist sehr reizvoll. Der heller Stern erscheint weiß und der kleinere eher gelblich.
STF1873 8m0 8m3 6.9'' 94° 2017 Boo 14h44m48.13s +07°42'04.00"
René Merting
Drachhausen (Germany)
100mm (64x) bei 32x ist mit etwas Geduld ein 8 erkennbar, Einschnürung nur leicht angedeutet - bei 64x ein knapp getrenntes Pärchen mit leichtem Farbkontrast
Mark McCarthy
Fremont (California/USA)
203mm (333x) Light orange and light blue, wide.
Karsten Kopp
Köln (Germany)
600mm (180x) Doppelstern ist leicht zu trennen und der Helligkeitsunterschied ist nur minimal. Der hellere Stern erscheint gelblich und der schwächere weiß-bläulich.
★★ STF1877, epsilon Boo, Izar AB 2m6 4m8 2.8'' 347° 2018 Boo 14h44m59.14s +27°04'29.90"
Robert Zebahl
Leipzig (Germany)
55mm (125x) The fainter component was seen as permanent brightening on the first diffraction ring of the primary component.
Robert Zebahl
Leipzig (Germany)
60mm (192x) Easy to split, whereby the much fainter component lies on the first diffraction ring of the primary component. The primary component itself appeared slightly yellowish. ../projects/double-stars/robert-zebahl/sketches/2018-04-10_epsilon_boo.jpg
Robert Zebahl
Leipzig (Germany)
70mm (133x) Easy to split, very unequal. A appeared in pale orange, B was visible as a very tiny, grey star on the first diffraction ring of component A.
René Merting
Drachhausen (Germany)
100mm (142x) bei 107x erscheint die B-Komponente nordwestlich leicht angesetzt an der gelblich strahlenden Komponente A - bei 142x dann ist die Trennung komplett, B liegt schön auf einem abgesetzten Beugungskranz von Komponente A
Stefan Loibl
Rosenheim (Germany)
102mm (205x) nice contrast yellow-orange/blue
Robert Zebahl
Leipzig (Germany)
120mm (192x) At 85x the fainter component was easily visible but not separated. At 192x well split. The fainter component was almost on the first diffraction ring of the primary component. Quite big difference in brightness. I did not looked at the color of the components.
Sarah Gebauer
Germany
150mm (166x) weder mit 166x noch mit 250x im April 2020 getrennt
Gerd Kohler
Langenzenn (Germany)
254mm (346x) Gelblich - leicht bläulich. Enges Paar. Deutlicher Helligkeitsunterschied.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) deutl. Farbkontrast blau gelb ../projects/double-stars/frederik-wanink/sketches/Izar.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Izar: Yellow-orange and blue, very pretty, as always
Karsten Kopp
Köln (Germany)
600mm (257x) Sehr einfaches und auffälliges Objekt. Dieser Doppelstern war für mich an diesem Abend das Highlight. Vor allem, weil der schwächere hellblaue Stern gerade knapp neben den Spikes des helleren gelben Sterns steht. ../projects/double-stars/karsten-kopp/sketches/STF1877.jpg
Berthold Fuchs
Wiesbaden (Germany)
130mm magnificent DS ../projects/double-stars/berthold-fuchs/photographs/eps%20Bootis.png
★★ HLD20, 5 Lib 6m5 10m1 4.7'' 249° 2001 Lib 14h45m57.78s -15°27'34.40"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Seeing distorts the A star into messy diffraction, but can see a much fainter orange star, seen as a point, outside the diffraction, 5-6", very fine!
Mark McCarthy
Fremont (California/USA)
508mm (333x) 8" 205x Orange star but no companion. 20" 333x Seeing distorted but a much fainter orange star seen as a point outside the diffraction, 5-6", Very fine! Put 8" mask back on @ 333x and can't see the B star!
STF1879 AB 7m8 8m4 1.7'' 82° 2018 Boo 14h46m15.58s +09°38'48.20"

../images/binary-star-orbits/STF1879-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Fairly close yellow and orange-yellow, ~1 delta mag, ~3"
Karsten Kopp
Köln (Germany)
600mm (180x) Doppelstern konnte gerade so getrennt werden. Beide erscheinen weißlich.
STF1881 6m7 8m8 3.5'' 2017 Vir 14h47m05.35s +00°58'15.20"
Uwe Pilz
Leipzig (Germany)
70mm (198x) sehr schwierig, einfach mit 105mm ../projects/double-stars/uwe-pilz/sketches/stf1881.jpg
Mark McCarthy
Fremont (California/USA)
203mm (205x) Blue-white and 3-4 delta mag fainter B star, dull blue color. Well separated.
STF1884 6m6 7m5 2.1'' 58° 2019 Boo 14h48m23.37s +24°22'01.00"

../images/binary-star-orbits/STF1884-orbit.jpg

René Merting
Drachhausen (Germany)
100mm (64x) bei 64x ist der Doppelstern als 8 erkennbar, 107x reicht dann für die knappe Trennung - die B-Komponente im NO ist nur unwesentlich schwächer - ein sehenswertes Pärchen
Robert Zebahl
Leipzig (Germany)
102mm (86x) At 86x pretty tight and unequal. At 160x clearly split. A: white, B: slightly orange.
Mark McCarthy
Fremont (California/USA)
203mm (333x) White, fairly close ~3", half delta mag.
Mark McCarthy
Fremont (California/USA)
203mm (333x) White, fairly close ~3", half delta mag.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Prototypical pair, >1 delta mag, ~3" separation, white to off white color
Frederik Wanink
Itterbeck (Germany)
254mm (640x) einfach ../projects/double-stars/frederik-wanink/sketches/STF1884.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange-white, 3 delta mag, ~5"
Karsten Kopp
Köln (Germany)
600mm (180x) Doppelstern konnte gerade so getrennt werden. Beide Sternen leuchten weißlich.
BU346 7m5 7m9 2.7'' 277° 2017 Lib 14h48m31.71s -17°20'24.40"

../images/binary-star-orbits/BU346-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Easy, well split, yellow-orange stars, half delta mag.
STF1883 7m0 8m9 1.0'' 278° 2015 Vir 14h48m53.22s +05°57'15.90"

../images/binary-star-orbits/STF1883-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Strongly suspect a split / elongation in 80mm finder. In the scope it is a tight 2 delta mag orangish-white pair, ~1"
AG346 9m9 10m4 9.6'' 335° 2015 Boo 14h49m04.12s +26°27'39.60"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Faint pair, wide, ~1 delta mag
BU106, mu Lib, 7 Lib AB 5m6 6m6 2.0'' 2016 Lib 14h49m19.09s -14°08'56.30"
AC 5m6 14m7 12.9'' 294° 2000
AD 5m6 14m1 25.7'' 168° 2000
AE 5m6 12m6 26.6'' 232° 2015

../images/binary-star-orbits/BU106-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (333x) AB: Close, 1.5-2", half to one delta mag, off-white stars
Mark McCarthy
Fremont (California/USA)
203mm (333x) AB: Close, 1.5-2", half to one delta mag, off-white stars.
Gerd Kohler
Langenzenn (Germany)
254mm (346x) AB: Bläulich-weiß - bläulich-weiß. A und B haben nur einen geringen Helligkeitsunterschied.
Gerd Kohler
Langenzenn (Germany)
254mm (346x) AE: Bläulich-weiß - weiß. Stern E ist sehr schwach.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) AB: getrennt, schwierig wegen Südlage ../projects/double-stars/frederik-wanink/sketches/MuLib.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB: Mu Lib: Easy, white & off white, 1 delta mag, ~3"
STF1890, 39 Boo 6m3 6m7 2.5'' 46° 2019 Boo 14h49m41.37s +48°43'15.60"

../images/binary-star-orbits/STF1890-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (67x) 2020-04-01: At 44x elongated, partly notched. At 67x split, but very tight. A difference in brightness was not seen. At 133x clearly separated with little difference in brightness. A appeared pale yellow, B rather warm-white.
Robert Zebahl
Leipzig (Germany)
70mm (100x) 2020-04-18: At 57x very finely separated with extremely tightly spaced components that appeared equally bright. At 100x a very nice pair with little difference in brightness. Fantastic sight! The color of the components was slightly different: creamy-white & a touch of yellow-orange.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) gleich hell ../projects/double-stars/frederik-wanink/sketches/39Boo.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright white pair, well split
★★★ alpha Lib, Zubenelgenubi, Kiffa Australis, Lanx Australis SHJ186 AB 2m7 5m2 231.1'' 314° 2012 Lib 14h50m52.78s -16°02'29.80"
AOT53 AC 2m7 12m5 275.6'' 291° 2000

Component A: 9 Lib, alpha 2 Lib
Component B: 8 Lib, alpha 1 Lib
The standardized name Zubenelgenubi only refers to alpha 2 Lib.

Christopher Hay
Seeheim (Germany)
naked eye AB: Noticed with naked eye and without prior PA knowledge that a secondary was flickering next to Zubenelgenubi. Unexpected and first naked-eye sighting. Checked position with binoculars to be sure. Further naked-eye look at Mizar/Alkor (Zeta UMa) to gauge my momentary acuity and assess the difference to Alpha Lib. Zeta UMa more easily and widely split than ever before, and Alkor appeared for the first time bluish, so this was an exceptional night for naked-eye double-star splitting. Three-star rating awarded because Zubenelgenubi is the second-best naked-eye true-physical double star in the summer sky after Mizar/Alkor.
Gerd Kohler
Langenzenn (Germany)
254mm (76x) AB: Bläulich-weiß - leicht bläulich.
Gerd Kohler
Langenzenn (Germany)
254mm (76x) AC: Bläulich-weiß - weiß. Sehr schwacher Begleiter.
STF1886 AB 7m6 9m7 7.9'' 224° 2018 Boo 14h51m02.31s +09°43'25.20"
Robert Zebahl
Leipzig (Germany)
102mm (28x) At 28x, the B component appeared rather faint and pretty close to the primary component. At 62x both components were clearly visible and unequal. A: slightly orange, B: greyish.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow-orange and orange, pretty wide ~10" 2 delta mag
Karsten Kopp
Köln (Germany)
600mm (180x) Einfach zu trennen, aber der Helligkeitsunterschied mit 2,1 mag ist auffällig. Der hellere Stern erscheint gelblich weiß und der schwächere rotbraun. Sehr schön.
Berthold Fuchs
Wiesbaden (Germany)
130mm close DS ../projects/double-stars/berthold-fuchs/photographs/STF%201886.jpg
STF1888 & ARN11, xi Boo, 37 Boo STF1888 AB 4m8 7m0 5.3'' 300° 2018 Boo 14h51m23.38s +19°06'01.70"
STF1888 AC 4m8 13m8 71.3'' 340° 2015
STF1888 AD 4m8 11m7 160.8'' 286° 2015
ARN11 AE 4m8 8m7 271.5'' 98° 2015
ARN11 AF 4m8 9m2 337.5'' 37° 2015
STF1888 BC 7m0 13m8 63.9'' 340° 2001
STF1888 BE 7m0 8m7 273.5'' 102° 2009

../images/binary-star-orbits/STF1888-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (44x) AB: 2020-04-24: Beautifully separated with quite a large difference in brightness in a lovely star field. The primary component shines yellowish with a faint companion.
Sarah Gebauer
Germany
150mm (83x) AB: die 6'' entfernten Komponenten A und B konnten mühelos bei 83x getrennt werden, Komponente E war zu sehen, C, D und F waren nicht sichtbar ../projects/double-stars/sarah-gebauer/sketches/20200416%20Xi%20Boo%20DSk.jpg
Mark McCarthy
Fremont (California/USA)
203mm (205x) AB: A star a very pretty light yellow with 2 delta mag. light orange B star, ~5" separation
Mark McCarthy
Fremont (California/USA)
203mm (205x) AB: A star a very pretty light yellow with 2 delta mag. light orange B, ~5".
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB: Xi Boo Pretty yellow & orange pair, 2 delta mag, ~8".
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Pretty. Yellow and orange pair, ~6", 3 delta mag.
Mark McCarthy
Fremont (California/USA)
508mm (333x) AB: Xi Boo. Short period. Richly colored yellow and orange stars, ~1 delta mag, ~5" separation, with several other stars in view. Very pretty
Karsten Kopp
Köln (Germany)
600mm (180x) AB: Ein recht schöner Doppelstern, wobei neben dem Helligkeitsunterschied von 2,2 mag auch die Sternfarben ein schönes Gesamtbild geben. Der hellere Stern erstrahlt gelblich weiß und der schwächere orangegelb.
Hier handelt es sich auch um ein recht nahes System mit 21,9 Lichtjahren Entfernung.
../projects/double-stars/karsten-kopp/sketches/STF1888.jpg
STT287 8m4 8m6 0.5'' 2018 Boo 14h51m27.53s +44°55'42.60"

../images/binary-star-orbits/STT287-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Wow! Hair-split, ~0.7", near equal to half a delta mag.
HO389 7m0 10m5 1.6'' 88° 2010 Boo 14h52m07.44s +20°17'26.50"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Extremely faint B resolves with best seeing as a tiny faint point outside first diffraction. Very tough, very excellent object
Mark McCarthy
Fremont (California/USA)
317mm (553x) Definite split of much fainter pair, ~1.5", somewhat lost in diffraction, but there!
A2071, EQ Boo 9m3 9m9 1.3'' 273° 2017 Boo 14h52m25.79s +17°57'23.30"
Mark McCarthy
Fremont (California/USA)
203mm (333x) EQ Boo. ! Very fine pair nicely split, ~1", ~1 delta mag
BU31 AB 8m5 10m3 2.0'' 222° 2017 Boo 14h52m30.05s +18°44'19.50"

../images/binary-star-orbits/BU31-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (333x) White A and light yellow B, finely split, ~2 delta mag
Karsten Kopp
Köln (Germany)
600mm (180x) Doppelstern konnte gerade so getrennt werden. Die Distanz von 2,0 Bogensekunden und die Helligkeit beider Sterne, macht die Sichtung nicht leicht.
STT288 6m9 7m5 1.0'' 157° 2018 Boo 14h53m23.35s +15°42'18.30"

../images/binary-star-orbits/STT288-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (333x) Consistent split, better with seeing, ~1 delta mag, ~1" separation, blue-white stars
Frederik Wanink
Itterbeck (Germany)
254mm (640x) rel. einfach ../projects/double-stars/frederik-wanink/sketches/STT288.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Notched / figure 8 with 277x, split with 553x.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Needed 553x to separate, resolved with the seeing. Near equal yellow-white, ~1" or less.
STT289 6m2 11m1 4.8'' 109° 2017 Boo 14h55m58.63s +32°18'00.30"
Mark McCarthy
Fremont (California/USA)
203mm (205x) With 8" 205x I noticed a very much fainter star emerge with averted vision then could hold direct, very fine, well split. At 8" 410x, I tried to bring out the B star with higher magnification, but oddly it disappeared. At 20" 410x, the B star easily seen though the disks are bloated, seeing not good
Mark McCarthy
Fremont (California/USA)
203mm (205x) 8" 205x Noticed a very much fainter star emerge with averted vision then could hold direct. Very fine, well split. 8" 410x Tried to bring out the B star with higher magnification, but oddly it disappeared. 20" 410x B star easily seen though the disks are bloated, seeing not good.
STF1895 8m3 8m9 12.7'' 42° 2017 Boo 14h57m27.87s +40°09'42.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint 1 delta mag pair, wide separation.
H6 51, 1 Ser AB 5m6 10m4 86.4'' 224° 2012 Vir 14h57m33.25s -00°10'03.40"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Orange in finder scope. In main scope a wide separation blue B, 3 delta mag
OL187 11m2 11m4 1.8'' 81° 2015 Boo 14h58m30.09s +15°07'55.40"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Faint pair, but with seeing the elongated smear resolves to two points, ~1 delta mag, ~2". [Uncertain pair.]
SHJ191 6m9 7m6 40.4'' 342° 2018 Boo 14h59m34.58s +53°51'36.70"
Robert Zebahl
Leipzig (Germany)
8x40 2020-04-05: Easily separable with clearly visible difference in brightness. Nice separation of the components. Colors not perceptible.
Robert Zebahl
Leipzig (Germany)
55mm (27x) 2020-04-05: Widely separated pair with rather small difference in brightness. Primary component: creamy white, companion: slightly orange.
Robert Zebahl
Leipzig (Germany)
70mm (22x) 2020-04-24: Widely separated with a moderate difference in brightness. Striking. The brighter component appeared yellowish-orange, the fainter one somehow darker and occasionally also cooler.
STT291, BX Boo 6m3 9m6 35.6'' 156° 2015 Boo 15h00m38.72s +47°16'38.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty wide, 2 delta mag, white.
STF1899 6m7 10m2 28.3'' 67° 2015 Lib 15h01m35.34s -03°09'50.50"
Mark McCarthy
Fremont (California/USA)
203mm (333x) White with very much fainter wide blue B
Mark McCarthy
Fremont (California/USA)
203mm (333x) White with very much fainter wide blue B.
Mark McCarthy
Fremont (California/USA)
203mm (333x) Light orange and faint (on edge of visibility) blue star, wide separation
BU348 AB 6m1 7m5 0.5'' 108° 2016 Vir 15h01m48.92s -00°08'24.90"
Mark McCarthy
Fremont (California/USA)
203mm (447x) At 333x, suspect elongation. At 667x, definite elongation. 447x was the best/cleanest view, clearly elongated. With 20" 667x & 447x, the view is too messy
Mark McCarthy
Fremont (California/USA)
203mm (447x) 8" 333x Suspect elongation. 8" 667x Definite elongation. 8" 447x, best/cleanest view, clearly elongated.
Mark McCarthy
Fremont (California/USA)
203mm (667x) Seems out of round at 333x and 677x, seeing too poor for 20". Marginal
HU1155 9m4 10m9 4.0'' 15° 2018 Boo 15h01m51.41s +15°06'20.70"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Blue-white stars, B is faint but can detect with direct vision and it flashes with averted. [not physical]
STF1909, 44 Boo 5m2 6m1 0.4'' 91° 2018 Boo 15h03m47.30s +47°39'14.60"

../images/binary-star-orbits/STF1909-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) 2015 getrennt zu sehen (1") ../projects/double-stars/frederik-wanink/sketches/44Boo.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) I Boo. Figure 8 to hair split, ~0.9". This pair shrinking separation fast, will be <0.5" in a couple of years. Only 40 LY away. (July 2017)
BU119 AB 8m1 8m8 2.3'' 275° 2017 Lib 15h05m31.91s -07°00'48.80"

../images/binary-star-orbits/BU119-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (333x) Tried 667x at first but it was too much power, too dim and seeing too choppy. 333x was perfect, clean and well split ~2" near equal, slightly orange
Mark McCarthy
Fremont (California/USA)
203mm (333x) 8" 667x Too much power, too dim and seeing too choppy. 8" 333x perfect, clean and well split ~2" near equal, slightly orange.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very like BU 346. well split near half delta mag yellow stars, 2.5”
ENG52, 45 Boo AB 5m0 11m5 103.7'' 40° 2015 Boo 15h07m18.06s +24°52'09.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright white-yellow A, very faint 4-5 delta mag B, bluish, very wide separation.
STF1910 7m3 7m5 3.9'' 211° 2019 Boo 15h07m32.95s +09°13'33.80"
Robert Zebahl
Leipzig (Germany)
70mm (44x) 2020-04-24: At 31x clearly visible as figure '8' and almost separated with similarly bright components. At 44x still very tight, but separated pair. Overall rather faint with little difference in brightness. The primary component appeared slightly yellowish-orange.
René Merting
Drachhausen (Germany)
100mm (64x) bei 32x ist noch nichts auffälliges zu erkennen - bei 64x zeigt sich ein eng stehendes Pärchen zweier gleich heller weißer Sterne, knapp getrennt - ein ziemlicher Sprung von "nichts zu sehen" zu "getrennt zu sehen"
Berthold Fuchs
Wiesbaden (Germany)
130mm close DS ../projects/double-stars/berthold-fuchs/photographs/STF%201910.jpg
HJ2766 5m8 12m2 57.6'' 331° 2016 Boo 15h08m35.56s +25°06'31.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange-yellow A with very wide, very faint B, ~ 4 delta mag.
STF3090 AB 9m1 9m3 0.6'' 289° 2018 Vir 15h08m42.97s -00°58'50.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Notched to hairline split at the best moments. Faint pair, tough. Seeing not good enough to go above 553x.
BU349 7m6 10m9 3.3'' 38° 2015 Vir 15h08m57.33s +01°41'21.40"
Mark McCarthy
Fremont (California/USA)
508mm (333x) B star easily seen despite diffraction. Can only see with 8" 333x after first having seen it in the 20", and even then need averted vision to bring it out
Mark McCarthy
Fremont (California/USA)
508mm (333x) 20" 333x, B star easily seen despite diffraction. Can only see with 8" @ 333x after first having seen it in the 20", and even then need averted vision to bring it out.
STF1916 8m4 10m6 9.8'' 332° 2018 Boo 15h09m54.15s +38°58'33.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and reddish B, 1.5 delta mag, 8-10"
STF1921 8m6 8m7 30.3'' 283° 2017 Boo 15h12m00.00s +38°40'12.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very wide white pair, 1 delta mag, easy!
STF1919 6m7 7m4 23.4'' 11° 2019 Ser 15h12m43.48s +19°17'09.80"
René Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein ordentlich getrenntes Pärchen - Helligkeitsunterschied eine halbe Größenklasse - A wirkt leicht gelblich, B ist grau - 20x reicht auch zur Trennung
Mark McCarthy
Fremont (California/USA)
203mm (205x) Pretty wide separated stars, both white with a tint of yellow. Half delta mag.
Mark McCarthy
Fremont (California/USA)
203mm (205x) Pretty wide separated stars, both white with a tint of yellow. Half delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very wide yellow and orange-yellow. In an arc of three stars, with nice orange carbon star at the other end.
ES2648 AB 7m3 11m2 26.3'' 341° 2015 Boo 15h12m43.76s +48°34'50.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange with very faint bluish star, 3-4 delta mag., ~0.8"
H5 125 8m4 9m5 32.2'' 228° 2017 Boo 15h12m47.74s +27°55'35.60"
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x zeigen sich zwei schwache Sternchen weit getrennt - Komponente B nicht signifikant schwächer - Farbkontrast zwischen beiden Sternen erkennbar, B mitunter bei 32x mit kupfernem Glanz
STT292 6m2 9m4 117.6'' 158° 2017 Boo 15h14m06.04s +31°47'16.20"
René Merting
Drachhausen (Germany)
18x70 ein Doppelstern mit Riesenabstand und großem Helligkeitsunterschied von mindestens 2.5 bis 3 Magnituden - B im SO ist gerade so erkennbar und weißgrau, A ist weißgelblich
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange star with two possible wide pairs, just pick one of the stars and that's B!]
STFA27, delta Boo, 49 Boo AB 3m6 7m9 105.0'' 78° 2017 Boo 15h15m30.16s +33°18'53.40"
René Merting
Drachhausen (Germany)
18x70 ein sehr ungleiches, weit auseinander stehendes Sternpaar - Komponente A im Westen strahlt gleißend cremegelb, die wesentlich schwächere Komponente B im Osten ist weißgrau bis bräunlich
Robert Zebahl
Leipzig (Germany)
70mm (22x) 2020-04-24: Widely separated pair with large difference in brightness. Less striking. The bright primary component shines in a bright yellow.
Mark McCarthy
Fremont (California/USA)
80mm (13x) Split in 80mm finder. Very wide pair, very bright A, 3 delta mag B. Orange-yellow and blue-white B
Mark McCarthy
Fremont (California/USA)
203mm (205x) Bright star with many nearby faint stars. Didn't bother trying to figure out which are which.
STF3091 AB-E 7m3 12m0 41.3'' 46° 2015 Ser 15h16m01.56s -04°53'52.30"
Mark McCarthy
Fremont (California/USA)
203mm (333x) White with very much fainter wide blue B
Mark McCarthy
Fremont (California/USA)
203mm (333x) White with very much fainter wide blue B. (AB-E seen, missed AB 0.5")
STF1932 AB 7m3 7m4 1.4'' 268° 2019 CrB 15h18m20.19s +26°50'24.70"

../images/binary-star-orbits/STF1932-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (333x) Near equal, yellowish white, ~2"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Near equal, yellowish white, ~2"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Very beautiful near equal white stars, ~1.5"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) gleich hell, getrennt ../projects/double-stars/frederik-wanink/sketches/STF1932.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal yellow-white, very close but clean split, ~1.5". Nice!
STF1931 AB 7m2 8m1 13.4'' 166° 2018 Ser 15h18m41.98s +10°25'39.70"
AC 7m2 12m7 172.9'' 93° 2015
Robert Zebahl
Leipzig (Germany)
70mm (22x) AB: 2020-04-24: At 22x clearly separated with a moderate difference in brightness. Striking, but still pretty tight. Primary component appears pale orange, the companion grey-blue. At 31x nice color contrast.
René Merting
Drachhausen (Germany)
100mm (20x) AB: bei 32x enges Pärchen, gut getrennt - Komponente B im Süden ist eine halbe Magnitude schwächer und grauweiß ggü. der weißen Komponente A - zurück auf 20x ist das Paar auch noch knapp getrennt erkennbar
★★ STF1930, 5 Ser AB 5m1 10m1 11.1'' 36° 2017 Ser 15h19m18.79s +01°45'55.50"
Stefan Loibl
Rosenheim (Germany)
102mm (68x) Messier 5 in the same FOV, wonderful
Mark McCarthy
Fremont (California/USA)
203mm (333x) Light yellow bright A, very much fainter orangish B, wide separation. Near M5.
STF1935 9m9 10m2 8.6'' 289° 2015 CrB 15h20m13.27s +30°41'44.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint wide pair, 1 delta mag.
BU32, 6 Ser AB 5m5 8m8 3.4'' 22° 2008 Ser 15h21m02.00s +00°42'55.20"
Robert Zebahl
Leipzig (Germany)
102mm (224x) Not split. Tried at 224x and 280x. Companion probably too faint. I had sidewalk lighting in the immediate vicinity.
Uwe Pilz
Leipzig (Germany)
105mm (288x) Der Begleiter ist sehr schwach. Auch mit 90 mm Blende noch gesehen ../projects/double-stars/uwe-pilz/sketches/190628_6Ser.jpg
Mark McCarthy
Fremont (California/USA)
203mm (333x) Light yellow A and very much fainter B, wide separation.
STF1936 9m9 10m1 19.8'' 231° 2015 CrB 15h21m07.63s +27°02'23.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty faint near equal wide white pair through finder. In scope one star splits into a close double
HJ2777 7m4 12m1 42.6'' 342° 2015 CrB 15h22m25.32s +25°37'27.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) UV CrB: Light orange with very faint blue B, very wide 3 delta mag.
STF1937, eta CrB AB 5m6 6m0 0.4'' 258° 2019 CrB 15h23m12.23s +30°17'17.70"
Mark McCarthy
Fremont (California/USA)
203mm (667x) 8" @ 333x, Suspect elongation. 8" 667x definite egg shape. 20" 667x: Can't get a good focus
Mark McCarthy
Fremont (California/USA)
203mm (667x) 8" 333x Suspect elongation. 8" 667x definite egg shape. 20" 667x Can't get a good focus.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) deutlich als 8 zu sehen, 2015 0,6" ../projects/double-stars/frederik-wanink/sketches/EtaCrB.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) Close orange pair, equal mag, snowman shape
Mark McCarthy
Fremont (California/USA)
317mm (553x) Overlapping / notched orange-yellow stars. Used apodising mask.
★★ mu Boo, 51 Boo, Alkalurops CHR181, mu 1 Boo Aa-Ab 4m3 0.1'' 188° 2012 Boo 15h24m29.54s +37°22'37.10"
STFA28, mu 1 Boo AB 4m3 7m1 109.0'' 172° 2018
STF1938, mu 2 Boo Ba-Bb 7m1 7m6 2.3'' 2019

../images/binary-star-orbits/CHR181-Aa-Ab-orbit.jpg ../images/binary-star-orbits/STF1938-Ba-Bb-orbit.jpg

Robert Zebahl
Leipzig (Germany)
8x40 STFA28 (AB): Easily split with obvious difference in brightness.
René Merting
Drachhausen (Germany)
16x70 STFA28 (AB): weit getrenntes Pärchen, aufgrund der großen Helligkeitsunterschiedes schöner Farbkontrast - Komponente A im Norden gelblich, B im Süden mehr grau-braun
Robert Zebahl
Leipzig (Germany)
70mm (22x) STFA28 (AB): Evident, very wide apart and unequal. A: white-yellowish, B: grey.
Robert Zebahl
Leipzig (Germany)
102mm (125x) STF1938 (Ba-Bb): Beautiful view! This triple system includes STFA 28 and STF 1938. ../projects/double-stars/robert-zebahl/sketches/2019-04-04_mu_boo.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) ein heller 4m und zwei nahe dunkle 7m, lohnend.
Robert Zebahl
Leipzig (Germany)
120mm (23x) STFA28 (AB): Easy to split with large angular distance and noticeable difference in brightness.
Sarah Gebauer
Germany
150mm (125x) A-BC mit 109'' sind bei 125x sehr weit getrennt, es ist der Ansatz eines engen Doppelsterns zu erkennen, der sich mit 2,2'' Abstand auch bis 250x nicht auftrennen ließ
Mark McCarthy
Fremont (California/USA)
203mm (205x) STFA28 (AB): Bright A star does not seem round. The B star is a tight equal pair, pretty set. [Aa,Ab is CHR 181 0.1", and I'd be shocked if I actually detected it. STFA 28 is technically the bright star and the tight pair, the tight pair is Ba,Bb = STF 1938, 7.09/7.63, 2.2"]
Mark McCarthy
Fremont (California/USA)
203mm (205x) STFA28 (AB): Bright A star does not seem round (CHR181). B star is a tight equal pair (STF1938 Ba-Bb). Pretty set. STFA 28 is technically the bright star and the tight pair
Mark McCarthy
Fremont (California/USA)
203mm (205x) CHR181 (Aa-Ab): Bright A star does not seem round (CHR181). B star is a tight equal pair (STF1938 Ba-Bb). Pretty set. STFA 28 is technically the bright star and the tight pair
Mark McCarthy
Fremont (California/USA)
203mm (205x) STF1938 (Ba-Bb): Bright A star does not seem round (CHR181). B star is a tight equal pair (STF1938 Ba-Bb). Pretty set. STFA 28 is technically the bright star and the tight pair
Frederik Wanink
Itterbeck (Germany)
254mm (640x) STF1938 (Ba-Bb): 3er System, schön ../projects/double-stars/frederik-wanink/sketches/STF1938.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) STF1938 (Ba-Bb): Tight 3 detla mag pair, fainter than the bright white A star Mu Boo.
Mark McCarthy
Fremont (California/USA)
317mm (277x) STFA28 (AB): Bright white star with tight yellow pair STF 1938 as its companion.
Mark McCarthy
Fremont (California/USA)
317mm (553x) STFA28 (AB): Striking. Bright star with near equal double STF 1938 paired with it. A star is a spectroscopic binary
Mark McCarthy
Fremont (California/USA)
317mm (553x) STF1938 (Ba-Bb): Near equal close but well split double also paired with STFA28
Karsten Kopp
Köln (Germany)
600mm (257x) Hier handelt es sich um ein Dreifachsternsystem, welches jetzt aber nicht durch eine besondere Färbung der Sterne auffällt. Die A - B/C Komponenten stehen noch sehr weit auseinander, wobei auch die A-Komponente um einiges heller erscheint. Die beiden Komponenten B/C sind wesentlich näher beieinander und unterscheiden sich auch kaum in ihrer Helligkeit. ../projects/double-stars/karsten-kopp/sketches/mu%20Boo.jpg
HU149 7m5 7m6 0.7'' 272° 2017 Dra 15h24m35.30s +54°12'46.10"

../images/binary-star-orbits/HU149-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) mit Zwischenraum zu sehen ../projects/double-stars/frederik-wanink/sketches/HU149.jpg
★★ STF1941 9m7 9m8 1.4'' 212° 2017 CrB 15h25m42.81s +26°37'40.50"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Faint stars, noticeable mag difference, very close ~1"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint, very close equal pair, ~1.5". Nice!
★★ STT296 AB 7m8 9m1 2.1'' 274° 2019 Boo 15h26m26.56s +44°00'13.20"
AC 7m8 12m7 80.7'' 313° 2016

../images/binary-star-orbits/STT296-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (205x) AB: Very fine but well split, ~2", yellow-white A, reddish B, 2 delta mag.
Mark McCarthy
Fremont (California/USA)
203mm (205x) AB: Very fine but well split, ~2", yellow-white A, reddish B, 2 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Very beautiful, 2", 2 delta mag, with very faint third (AC) seen with averted vision widely separated.
Mark McCarthy
Fremont (California/USA)
317mm (553x) AC: Very beautiful, 2", 2 delta mag, with very faint third (AC) seen with averted vision widely separated.
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Close near equal, 1 delta mag, white.
KU108 AB 7m5 9m7 40.7'' 319° 2015 Boo 15h27m40.35s +42°52'52.90"
Mark McCarthy
Fremont (California/USA)
203mm (205x) White A and reddish B stars. Wide, 2 delta mag. [Need to try this with the 20": BC = RAO 18 9.74/11.00 0.4"]
Mark McCarthy
Fremont (California/USA)
203mm (205x) White A and reddish B stars. Wide, 2 delta mag. (Need to try this with the 20": BC = RAO 18 9.74/11.00 0.4")
JEF1, bet CrB 3m7 5m2 0.3'' 140° 2019 CrB 15h27m49.85s +29°06'19.80"
Mark McCarthy
Fremont (California/USA)
762mm (457x) Suspect out of roundness in the star disk. Tried with and without a hexagon mask.
STF1972, pi 1 UMi AB 6m6 7m3 31.6'' 80° 2018 UMi 15h29m11.19s +80°26'55.00"
René Merting
Drachhausen (Germany)
100mm (20x) bei 32x weit getrennt - Komponente B ist nur knapp schwächer als A - Komponente A gelblich-weiß, B sorgt für einen sanften Farbkontrast mit weiß und einem Stich ins orange - bei 20x ebenfalls ein weit getrenntes Pärchen in schönem Umfeld mit vielen gleich hellen Sternen
★★ STF1950 8m1 9m2 3.3'' 92° 2019 Ser 15h29m58.46s +25°30'31.10"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Dull orange A star, 1.5 delta mag to B, B star ~4", a flatter orange color
Mark McCarthy
Fremont (California/USA)
203mm (333x) Dull orange A, 1.5 delta mag, B ~4", a flatter orange color.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Very fine orange pair 2 delta mag, ~1.5”. B appears fine and delicate.
Mark McCarthy
Fremont (California/USA)
317mm (340x) 72 Vir: Bright A and very faint B, widely separated.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty orange and pale orange, 2 delta mag, ~4"
COU610, the CrB 4m3 6m3 0.8'' 198° 2016 CrB 15h32m55.78s +31°21'32.90"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Notched/snowman at best moments. B definitely fainter and almost blue. looks like an appendage. 20" too messy. I tried this one in 2018 with a 30" scope and failed.
Mark McCarthy
Fremont (California/USA)
203mm (667x) Notched/snowman at best moments. B definitely fainter and almost blue. Very faintly split, looks like a blue appendage.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) nicht als DS gesehen
Mark McCarthy
Fremont (California/USA)
317mm (738x) Tried pretty hard at 553x with apodizing screen, but dances too much. Used 6mm ortho with barlow, 738x, and at best moment it is olive shaped, but marginal. Observation August 2018
Mark McCarthy
Fremont (California/USA)
762mm (915x) The CrB: Fractured and dancing seeing. 915x, at full aperture and with 8-inch aperture mask, I see a slight out of roundness.
STF1955 AB 9m8 10m3 7.8'' 237° 2017 CrB 15h33m51.28s +26°42'30.40"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Near equal white stars, wide
STF1954, delta Ser, 13 Ser AB 4m2 5m2 4.0'' 171° 2019 Ser 15h34m48.14s +10°32'20.00"
AC 4m2 13m9 66.6'' 18° 2014
CD 13m9 14m6 4.0'' 341° 2018

../images/binary-star-orbits/STF1954-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (57x) AB: Easy to separate with relatively close components and a clear difference in brightness. A appeared rather white, B slightly orange.
René Merting
Drachhausen (Germany)
100mm (107x) AB: bei 142x zwei gut getrennte reinweiße Komponenten - B wirkt eine halbe Größenklasse schwächer - zurück auf 107x ist die Trennung ebenfalls einfach - zurück auf 64x ist es eine 8 mit tiefen Einschnürungen, kurz vor der Trennung
Stefan Loibl
Rosenheim (Germany)
102mm (102x) AB: sparse field
Sarah Gebauer
Germany
150mm (85x) AB: Mit 85x schon schön getrennt, ein leichter Größenunterschied der Sterne zu erkennen, einige schwache Feldsterne im Okular bei 0,95° Gf. ../projects/double-stars/sarah-gebauer/sketches/20200422%20Delta%20Ser%20DSk.jpg
Frederik Wanink
Itterbeck (Germany)
254mm (640x) AB: getrennt, Del Ser ../projects/double-stars/frederik-wanink/sketches/STF1954.jpg
STT298 AB 7m2 8m4 1.3'' 187° 2017 Boo 15h36m02.22s +39°48'08.90"
AB-C 6m9 7m8 120.4'' 328° 2017
AB-D 6m9 13m9 167.4'' 224° 2002
AB-E 6m9 12m1 456.0'' 335° 2002

../images/binary-star-orbits/STT298-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
102mm (28x) AB-C: Wide, moderately unequal pair. Little difference in color: Primary components appeared a bit more orange colored.
Robert Zebahl
Leipzig (Germany)
120mm (23x) AB-C: Easy to split with large angular distance and noticeable difference in brightness.
Mark McCarthy
Fremont (California/USA)
203mm (205x) AB: At zenith, but worth the effort to slew to. Another great 2+1. The tight pair [AB] is near equal and split a little more than a hairline
Mark McCarthy
Fremont (California/USA)
203mm (205x) AB: At zenith, but worth the effort to slew to. Another great 2+1. The tight pair (AB) is near equal and split a little more than a hairline split.
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: One component of compicated 6 star system, some of which is split in 80mm finter. This is a close equal pair, ~2".
STF1963 AB 8m5 8m8 5.2'' 298° 2019 CrB 15h37m53.73s +30°06'10.40"
Mark McCarthy
Fremont (California/USA)
317mm (340x) 81 Vir: Well split close pair of yellow stars about equal magnitude
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal white, ~6"
★★ STF1964 & HU1167 HU1167 AB 8m1 9m9 1.4'' 80° 2016 CrB 15h38m12.91s +36°14'48.60"
STF1964 AC 8m1 8m1 14.5'' 90° 2017
STF1964 AD 8m1 9m0 15.1'' 84° 2018
STF1964 CD 8m1 9m0 1.5'' 21° 2019

../images/binary-star-orbits/HU1167-AB-orbit.jpg ../images/binary-star-orbits/STF1964-CD-orbit.jpg

René Merting
Drachhausen (Germany)
18x70 STF1964 (AC): zu erkennen sind zwei gleich helle, sehr dicht stehende Sterne - Trennung ein wenig mehr als knapp
René Merting
Drachhausen (Germany)
100mm (20x) STF1964 (AC): bei 20x ein gut getrenntes Pärchen gleich heller Sterne, auffallend im Sternumfeld
Robert Zebahl
Leipzig (Germany)
102mm (62x) STF1964 (AC): Rather wide pair, equal without visible difference in color.
Uwe Pilz
Leipzig (Germany)
105mm (16x) Dreifachstern nicht trennbar
Robert Zebahl
Leipzig (Germany)
120mm (23x) STF1964 (AC): Nice double star, well split with equally bright components.
Mark McCarthy
Fremont (California/USA)
317mm (277x) STF1964 (AC): Well split equal pair. I suspect B is pair as it is an elongated orange smear at 277x -- it is STF 1964CD.
Mark McCarthy
Fremont (California/USA)
317mm (553x) STF1964 (CD): Split, light orange 1 delta mag pair
Mark McCarthy
Fremont (California/USA)
317mm (553x) STF1964 (CD): Faint near equal pair about 3" separation. In the same field with HU 1167. Magnificent
Mark McCarthy
Fremont (California/USA)
317mm (553x) HU1167 (AB): Bright star with much fainter pair, about 1" separation, 3-4 delta mag. In same field with STF 1964. Magnificent
STF1965, zeta 2 CrB 5m0 5m9 6.3'' 306° 2019 CrB 15h39m22.68s +36°38'09.00"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein knapp getrenntes deutlich helleres Pärchen als der 27' südwestlich stehende Doppelstern STF1964 - Komponente B ist gut eine Größenklasse schwächer als A - beide Komponenten schmiegen sich meist noch aneinander, aber in guten Momenten sind beide getrennt sichtbar - zurück auf 20x ist ein länglicher Stern erkennbar
Robert Zebahl
Leipzig (Germany)
102mm (28x) At 28x very tight and barely split, unequal. At 86x very nice view. No difference in color: both components appeared white.
Stefan Loibl
Rosenheim (Germany)
102mm (68x) Elongated at 28x, split with 68x. Component A blue, B reddish. At 68x double star STF1964 in the same FOV ../projects/double-stars/stefan-loibl/sketches/ZetaCrB_20200601.jpg
Robert Zebahl
Leipzig (Germany)
120mm (48x) Very nice double star, well split with noticeable difference in brightness.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Bright white, well separated, ~1 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice bright white pair, wide, half a delta mag.
Karsten Kopp
Köln (Germany)
600mm (180x) Doppelstern konnte gut getrennt werden. Der Helligkeitsunterschied ist nicht sehr groß und der etwas hellere Stern erscheint weißlich und der schwächere geht eher ins bläulich weiße.
STF1989, pi UMi 7m3 8m2 0.7'' 23° 2013 UMi 15h39m38.61s +79°58'59.60"

../images/binary-star-orbits/STF1989-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) blickweise als 8 zu sehen, schwierig ../projects/double-stars/frederik-wanink/sketches/pi2Umi.jpg
STT300 6m3 10m1 14.5'' 262° 2019 Ser 15h40m10.35s +12°03'10.60"
René Merting
Drachhausen (Germany)
100mm (64x) bei 32x war B anscheinend noch zu schwach - bei 64x ist B ganz schwach gut abgesetzt vom gelblich schimmernden Hauptstern erkennbar
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange-yellow with wide separation bluish B, 3 delta mag.
STF1967, gam CrB 4m0 5m6 0.6'' 111° 2012 CrB 15h42m44.57s +26°17'44.30"

../images/binary-star-orbits/STF1967-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (667x) Definite mis-shape, oval to egg, observation made June 2019
Mark McCarthy
Fremont (California/USA)
203mm (667x) Gamma CrB. Definite mis-shape, oval to egg.
STF1970, bet Ser AB 3m7 10m0 29.4'' 265° 2019 Ser 15h46m11.21s +15°25'18.90"
René Merting
Drachhausen (Germany)
100mm (32x) bei 64x ist B extrem schwach, aber gut abgesetzt westlich vom gleißend hellen A erkennbar - zurück auf 32x ist B auch gerade so erkennbar, noch immer gut von A getrennt
Mark McCarthy
Fremont (California/USA)
317mm (277x) Very wide separation, white A and bluish B. B looks like a planet reflecting A's light. 5 delta mag.
★★ STT301 7m5 10m4 4.0'' 27° 2017 Boo 15h46m13.64s +42°28'06.30"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Wide magnitude difference, ~4 delta mag. B is faint but well split, ~5"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Wide mag difference, ~4 delta mag. B is faint but well split, ~5".
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wow. Relatively bright A, orange, with a very faint B which shimmers and sparkles to view with averted vision and held with direct. B star is small, 4-5 delta mag, 6-8"
★★ STF1973 7m6 8m8 30.8'' 320° 2015 CrB 15h46m24.50s +36°26'45.60"
René Merting
Drachhausen (Germany)
18x70 ein gut getrenntes Sternpaar - Komponente A im Südosten ist doppelt so hell wie B - ganz leichter Farbkontrast
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x sind beide Sterne gut getrennt erkennbar - schöner Farbkontrast zwischen beiden ungleich hellen Sternen
Uwe Pilz
Leipzig (Germany)
105mm (53x) blaugrün-orange, trennbar bei 15x ../projects/double-stars/uwe-pilz/sketches/stf1973.jpg
Robert Zebahl
Leipzig (Germany)
120mm (23x) Nice double star, easy to split with noticeable difference in brightness.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide, 1 delta magnitude white.
EIS1 AB 7m5 11m9 17.7'' 353° 2017 Ser 15h48m09.46s +01°34'18.20"
Mark McCarthy
Fremont (California/USA)
203mm (333x) White A with wide and much fainter B. CDSA says: "Local, solar type double with BY Dra type variable."
STF2034 7m7 8m0 1.1'' 110° 2017 UMi 15h48m43.02s +83°37'10.50"
Robert Zebahl
Leipzig (Germany)
102mm (187x) At 187x clearly elongated, partly visible as '8' with slight difference in brightness. At 280x two distinct, slightly overlapping Airy disks visible.
BU621 7m9 9m4 0.6'' 27° 2018 Boo 15h49m49.96s +44°31'19.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) nice, split with seeing, 2 delta mag, very close, very slightly orange and yellow stars.
ES1554 11m0 11m2 4.9'' 2016 Boo 15h49m51.07s +43°50'42.10"
Mark McCarthy
Fremont (California/USA)
508mm (667x) near equal but wide separated stars, 10th 11th mag.
STF1982 9m9 10m1 4.8'' 299° 2019 Boo 15h49m51.25s +42°47'19.60"
Mark McCarthy
Fremont (California/USA)
508mm (667x) near equal wide separated orange stars.
Karsten Kopp
Köln (Germany)
600mm (180x) Trotz der geringen Sternhelligkeit, beider Sterne, mit 9,9 und 10,1 mag, konnte der Doppelstern gut getrennt werden. Der etwas hellere erscheint gelblich und der schwächere weißlich.
SKF1311 5m3 10m3 74.8'' 300° 2015 Ser 15h50m17.55s +02°11'47.50"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Cool. Bright yellow-orange star broken up by seeing and with a water vapor glow (sky is deteriorating). Much fainter B star hanging at edge of halo.
HJ574 AB 9m3 12m3 15.8'' 94° 2015 CrB 15h50m18.44s +32°24'22.40"
Mark McCarthy
Fremont (California/USA)
508mm (667x) light orange star with two rather fainter in a near line, fainter one (AB) closer in (further is AC).
BU810 9m1 10m8 1.6'' 84° 2016 Her 15h51m00.24s +42°27'59.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Very cool, light orange and blue, close but very good split. 2 delta mag.
COU1447 11m0 11m3 2.3'' 297° 2015 CrB 15h51m14.02s +38°36'27.80"
Mark McCarthy
Fremont (California/USA)
508mm (667x) nice pair, equal, well separated, faint.
STT302 AB 7m2 10m4 28.6'' 51° 2015 CrB 15h54m56.85s +34°21'45.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint pair, pretty close, ~2”.
HO399 7m7 10m5 3.4'' 115° 2018 CrB 15h55m25.81s +29°32'13.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Relatively bright A star with very faint pair, need averted vision to notice, ~4" separation and 4-5 delta mag
STF1988 7m6 7m8 1.7'' 249° 2019 Ser 15h56m45.53s +12°28'40.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal yellow-white pair, ~2".
HJ577 9m3 10m5 9.4'' 13° 2015 CrB 15h56m48.71s +35°30'15.60"
Mark McCarthy
Fremont (California/USA)
508mm (667x) wide separated orange-yellow and blue, 1 delta mag. nice
Karsten Kopp
Köln (Germany)
600mm (180x) Doppelstern konnte gut getrennt werden. Beide Sterne erscheinen weißlich.
COU803 11m1 11m2 1.6'' 217° 2015 CrB 15h56m52.06s +32°44'11.70"
Mark McCarthy
Fremont (California/USA)
508mm (667x) very fine, very nice pair, equal, well separated close pair.
STF1987 7m3 8m7 10.4'' 320° 2017 Ser 15h57m14.92s +03°24'19.20"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein schön eng zusammen stehendes Pärchen - Komponente B im NW ist über eine Größenklasse schwächer und dadurch leicht blau-grau gegenüber der weißen A-Komponente
STT303 AB 7m7 8m1 1.6'' 175° 2019 Ser 16h00m54.16s +13°16'18.20"

../images/binary-star-orbits/STT303-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal white, ~1.5". Nice!
STT304 AB 6m8 10m6 10.4'' 173° 2015 CrB 16h00m54.94s +39°10'39.00"
Mark McCarthy
Fremont (California/USA)
508mm (667x) yellow-orange, bright, with wide sep 3 delta mag pair.
Karsten Kopp
Köln (Germany)
600mm (180x) Einfach zu trennen, aber trotz großen Helligkeitsunterschied von 3,8 mag eher unspektakulär.
S676, rho CrB 5m5 10m5 141.7'' 47° 2012 CrB 16h01m02.65s +33°18'12.60"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Rho CrB. bright orange star with very obvious wide B, 3 delta mag
AG200 10m6 10m9 3.1'' 217° 2018 CrB 16h01m09.14s +39°36'11.80"
Mark McCarthy
Fremont (California/USA)
508mm (667x) light orange yellow, fine, well split 3" equal.
TDS797 11m4 11m8 0.9'' 86° 2015 CrB 16h02m25.87s +35°53'56.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) two near equal very faint stars resolve from haze with averted vision.
STF2000 8m4 9m2 2.5'' 227° 2019 Ser 16h03m02.17s +13°59'28.80"
René Merting
Drachhausen (Germany)
100mm (107x) bei 107x ein knapp getrenntes Pärchen, Komponente B südwestlich etwas schwächer - bei 142x wird der Anblick nicht wirklich besser
STF2004 9m5 10m3 1.8'' 278° 2015 CrB 16h03m12.42s +28°51'06.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Nice airy disks. Orange stars 1 delta mag, well split, very pretty
HJ581 12m0 12m1 21.2'' 56° 2015 CrB 16h04m14.01s +32°22'10.90"
Mark McCarthy
Fremont (California/USA)
508mm (667x) faint wide near equal.
WNO47 6m7 12m9 70.0'' 280° 2015 CrB 16h04m56.79s +39°09'23.40"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Tried but did not see faint B star in 8", so switched to 20". Wide split and faint. nothing too special visually, but intellectually, according to the Cambridge Double Star Atlas: "Local, high CPM, low mass double, AB: ps = 13,70 AU (2000)
Mark McCarthy
Fremont (California/USA)
508mm (205x) Did not see faint B star in 8", so switched to 20". Wide split and faint. nothing too special visually, but intellectually interesting, per CDSA: "Local, high CPM, low mass double, AB: ps = 13,70 AU (2000).
H3 7, beta Sco AC 2m6 4m5 13.0'' 20° 2018 Sco 16h05m26.23s -19°48'19.40"
Christopher Hay
Seeheim (Germany)
15x45 Stabilised binoculars, handheld. Difficult handheld in this instrument, but clearly split and attractive as such. Tripod mounting would surely help and make the difference for a nice pair for this magnification. One of the earliest doubles split, found by Benedetto Castelli in 1627, but according to Stelledoppie not a physical double (in contrast to the very tight BU 947 AB pair in the system, which is physical, with a separation of 0.3” in 2020 and 0.4” in 2030 – and the wide PWL 9001 AD pair with a separation of 518” – A, B and D are thus a physical triple). “H“ in the catalogue name means that this double star is listed in the catalogue of W. Herschel. The 3 in the name means that it is a double star of the 3rd Class [separation 5'' - 15''] in Herschel’s system.
Sarah Gebauer
Germany
150mm (85x) unspektakulär, mit 85x einfach zu trennen, wenige Feldsterne ../projects/double-stars/sarah-gebauer/sketches/20200717%20Beta%20Sco%20DSk.jpg
STF2007 AB 6m9 8m0 37.5'' 322° 2018 Ser 16h06m02.82s +13°19'15.50"
René Merting
Drachhausen (Germany)
16x70 gut getrenntes Sternpaar - Komponente B im NW ist deutlich schwächer und schmutzig grau gegenüber der weißen A-Komponente
Mark McCarthy
Fremont (California/USA)
80mm (13x) Split in finder. Two yellow stars, 2 delta mag, wide.
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x weit getrennt, B nordwestlich dürfte gut eine Magnitude schwächer sein - tolle Farben, A ist gelblich, B strahlt orange
STF2011 AB 7m9 10m2 2.7'' 67° 2015 CrB 16h07m38.27s +28°59'43.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White and reddish 3 delta mag, ~2".
Mark McCarthy
Fremont (California/USA)
508mm (667x) Fine pair, 2 delta mag, blue white and dull b almost brown.
STF2010, kap Her AB 5m1 6m2 27.0'' 14° 2019 Her 16h08m04.55s +17°02'49.20"
René Merting
Drachhausen (Germany)
16x70 ein eng stehendes Pärchen mit einem leichten Farbkontrast, weil Komponente B im Norden mindestens eine Größenklasse schwächer erscheint - dadurch wirkt B gegenüber nicht rein weiß, sondern dumpf grau-weiß
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x leicht zu trennen - zwei richtig helle Sterne, B im Norden eine halbe Größenklasse schwächer - bei 64x schöner Farbkontrast, Komponente A satt gelb, B weiß mit einem Stich ins orange
Karsten Kopp
Köln (Germany)
600mm (135x) Sehr einfacher Doppelstern.
Komponente A erscheint orange, während die Komponente B weiß scheint.
COU1276 10m9 12m9 2.7'' 55° 2006 CrB 16h08m52.28s +37°58'00.80"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Good find, B star only visible averted vision, flashes out obvious and clear.
STF2015 AB 8m2 9m5 3.0'' 159° 2019 Her 16h08m54.75s +45°21'11.80"
René Merting
Drachhausen (Germany)
100mm (107x) bei 107x ist Komponente B südlich von A knapp getrennt erkennbar - Helligkeitsunterschied eine knappe Größenklasse, dadurch wirkt B nicht ganz so reinweiß wie A
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very fine orange-yellow A and a more orange B, 1.5 delta mag, ~3"
Karsten Kopp
Köln (Germany)
600mm (180x) Doppelstern ist gut zu trennen. Der Helligkeitsunterschied ist merklich, aber nicht markant. Der hellere leuchtet weißlich und der schwächere eher gelblich.
TDS9780 11m3 11m7 0.9'' 47° 1991 CrB 16h10m19.66s +35°05'56.40"
Mark McCarthy
Fremont (California/USA)
508mm (667x) B star shows itself only with averted vision. Very faint. Tight but well split
STT307 7m7 10m7 17.5'' 201° 2015 Her 16h10m31.74s +47°48'25.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and very wide 3 delta mag B
STF2025 8m0 9m8 2.6'' 164° 2015 Her 16h11m11.71s +47°33'36.10"
René Merting
Drachhausen (Germany)
100mm (107x) bei 107x wird mit viel Konzentration Komponente B südlich von A ganz knapp getrennt und wie ein Schatten bzw. wie eine zarte Andeutung erkennbar - bei 142x habe ich vergeblich versucht, B noch einmal zu erblicken - schwer
Mark McCarthy
Fremont (California/USA)
317mm (553x) Unrelated wide near equal white pair split in finder, but one has a very faint ~2 delta mag 2-3" companion and is the AB pair. Nice!
Karsten Kopp
Köln (Germany)
600mm (180x) Doppelstern konnte gut getrennt werden. Beide Komponente wirken weißlich.
STT305 AB 6m4 10m2 5.7'' 263° 2017 CrB 16h11m39.60s +33°20'33.80"
AC 6m4 13m0 27.8'' 264° 1847
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Orange star and faint blue B, wide.
René Merting
Drachhausen (Germany)
320mm (144x) bei 144x ist B hauchzart westlich neben der intensiv gelblich strahlenden A-Komponente erkennbar - Helligkeitsunterschied … riesig bzw. nicht abschätzbar - es hat ein wenig gedauert, bis ich B entdeckt habe, dann aber war es relativ leicht
Mark McCarthy
Fremont (California/USA)
508mm (667x) AB: Yellow orange and blue, wide, 2 delta mag Pretty. (Did not notice 13th mag AC)
STF2024 5m9 10m7 23.8'' 45° 2019 Her 16h11m47.60s +42°22'28.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty orange and blue wide pair, 3 delta mag. B almost blinks like a planetary nebula.
Karsten Kopp
Köln (Germany)
600mm (180x) Sehr einfacher Doppelstern. Hier liegt der Reiz im Helligkeitsunterschied beider Komponenten. Die Komponente A erstrahlt gelblich, während die Komponente B sich leicht bläulich zeigt.
HJ260 11m4 13m3 19.8'' 27° 2015 CrB 16h11m50.72s +37°25'00.30"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Wide faint near equal
H5 6, nu Sco AC 4m3 6m6 41.3'' 337° 2018 Sco 16h11m59.74s -19°27'38.30"
Christopher Hay
Seeheim (Germany)
15x45 Stabilised binoculars, handheld. Widely separated. Nice pair reminiscent of Beta Lyrae at 10x. Also split clearly in stabilised handheld 10x42, but view not as pleasing as in 15x45.
Christopher Hay
Seeheim (Germany)
15x60 Wide split. Secondary faint blue, a fine contrast to the very slightly yellowish-white primary.
STF2016 8m5 9m6 7.5'' 147° 2019 Her 16h12m07.05s +11°54'39.20"

Only 11 arcminutes northwestward is the pretty bright planetary nebula IC4593.

Robert Zebahl
Leipzig (Germany)
120mm (40x) Conditions in the target region: SQM-L 20.6
Split at 40x with obvious difference in brightness. At 75x easily split.
Karsten Kopp
Köln (Germany)
600mm (180x) Leicht zu trennender Doppelstern. Beide Komponenten erstrahlen weißlich und deutlichem Helligkeitsunterschied.
STF2030 7m9 10m2 5.7'' 239° 2018 Her 16h12m43.21s +40°46'54.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice yellowish pair, 3 delta mag, wide B
STF2022 6m5 10m0 2.5'' 153° 2018 CrB 16h12m45.46s +26°40'14.00"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Nice tight split, ~2". Large delta mag. At 8" noticed the B star with averted vision but could hold
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow orange and blue pair. B is much fainter, 3-4 delta mag, ~1.5"
STF2021, 49 Ser AB 7m4 7m5 4.0'' 358° 2019 Her 16h13m18.45s +13°31'37.20"

../images/binary-star-orbits/STF2021-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (57x) Lovely split. Almost equal pair with relatively close components.
René Merting
Drachhausen (Germany)
100mm (64x) bei 32x zeigen sich zwei gleich helle weiße Sterne, die sich gerade noch berühren - bei 64x dann knappe Trennung, B ist nur minimal schwächer
Mark McCarthy
Fremont (California/USA)
317mm (553x) Equal yellow-white stars, ~4".
Karsten Kopp
Köln (Germany)
600mm (180x) Doppelstern ist gut zu trennen, bei fast identischer Helligkeit. Ein weißliches Augenpaar schaut mich an.
STF2029 8m0 9m6 6.0'' 187° 2018 CrB 16h13m47.82s +28°43'55.90"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Wide split, ~2 delta mag, pretty, faint pair.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice red-orange and B ~5" 2 delta mag.
Mark McCarthy
Fremont (California/USA)
508mm (667x) Slightly yellow and blue stars, wide
Karsten Kopp
Köln (Germany)
600mm (180x) Doppelstern ist einfach zu trennen, bei einem Helligkeitsunterschied von 1,6 mag. Die heller Komponente A erstrahlt weißlich, während die Komponente B sich weißbläulich zeigt.
POP103 10m8 13m3 3.9'' 54° 2015 CrB 16h13m59.63s +35°10'16.10"
Mark McCarthy
Fremont (California/USA)
508mm (667x) B star noticed & seen better averted vision but can hold direct. Wide split, 2 delta mag.
sigma CrB, 17 CrB, STF2032 AB 5m6 6m5 7.2'' 239° 2019 CrB 16h14m40.85s +33°51'31.00"

../images/binary-star-orbits/STF2032-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (22x) At 22x clearly separated, but very close with a clear difference in brightness. At 57x easy without any noticeable difference in color.
René Merting
Drachhausen (Germany)
100mm (32x) bei 20x zwei knapp zusammenstehende Sterne mit tiefer Einschnürung - bei 32x dann ein knapp getrenntes Pärchen - B-Komponente südwestlich gut eine halbe Größenklasse schwächer - beide Sterne mit weißem Brautkleid
Stefan Loibl
Rosenheim (Germany)
102mm (26x) Already split at 26x. Component A orange, B yellow.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice wide white, ~1 delta mag.
René Merting
Drachhausen (Germany)
320mm (72x) bei 72x ein schick anzusehendes, knapp getrenntes Pärchen - A im Osten ist hellgelb - B ist vielleicht eine halbe Größenklasse schwächer und auch gelblich, aber nicht so stark wie A
Mark McCarthy
Fremont (California/USA)
508mm (667x) Sigma CrB. AB nice bright half delta mag wide. two more stars in system, one (AC) closer fainter, other (AD) further away.
Karsten Kopp
Köln (Germany)
600mm (135x) Sehr einfaches, auffälliges Objekt im Okular, ansonsten keine weiteren Auffälligkeiten.
STF2026 AB 9m5 9m9 3.5'' 16° 2019 Her 16h15m57.07s +07°21'24.80"

../images/binary-star-orbits/STF2026-AB-orbit.jpg

René Merting
Drachhausen (Germany)
100mm (107x) bei 64x sind die Sterne so schwach, dass ich hellere Sterne im Umfeld zum Fokussieren nutzen muss - beide Komponenten sind als 8 erkennbar, die Einschnürung ist aber nur in guten Momenten da - bei 107x dann gelingt die Trennung, B wirkt deutlich schwächer (in Wirklichkeit ist B nur 0m4 schwächer), aber vielleicht liegt es daran, dass die beiden Sterne ohnehin nur sehr schwach beobachtbar sind - das hat wenig Freude bereitet
ENG56, 15 Her AB 7m4 10m6 61.9'' 252° 2015 Her 16h15m59.88s +11°25'30.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and very wide 3 delta mag B. A 3rd star making a triangle, it is a triple system
HJ584 10m2 13m5 15.4'' 200° 2015 CrB 16h17m44.07s +39°14'25.00"
Mark McCarthy
Fremont (California/USA)
508mm (667x) A star is orange, B a little blue, faint. Good wide split, obvious.
HU1172 10m0 10m1 1.7'' 328° 2019 CrB 16h18m47.11s +31°53'51.00"
Mark McCarthy
Fremont (California/USA)
508mm (667x) nice near equal well spit pair, whitish yellow
STF2037 9m8 9m9 1.1'' 256° 2017 Her 16h18m49.03s +17°23'58.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very small elongated haze with two brightenings resolving to points with seeing.
TDS9841 12m5 13m3 2.6'' 350° 1991 CrB 16h19m51.32s +27°27'38.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Very faint pair but with averted vision could notice and then hold direct. Half delta mag, wide
COU981 11m3 11m4 1.1'' 132° 2015 CrB 16h19m55.21s +35°59'35.40"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Marginal with poor transparency and nearly full moon. It's a little too hazy to be sure, but there is certainly an elongation in that haze, or rather the haze is large enough to contain the two stars.
KUI72 5m5 10m0 2.1'' 127° 1997 Her 16h19m55.24s +39°42'30.90"

../images/binary-star-orbits/KUI72-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Distinct faint point appears with perfect seeing ~2-3". Much smaller and fainter than A.
gamma Her, 20 Her DRS58 AD 2m9 8m1 8.3'' 176° 2010 Her 16h21m55.24s +19°09'10.90"
SHJ227 AB 3m8 10m1 43.3'' 226° 2013
SHJ227 BC 10m1 13m3 82.0'' 298° 2015
Robert Zebahl
Leipzig (Germany)
102mm (280x) AD: It is already the second attempt at this double star. There was nothing perceptible at the best of intentions, which indicates a double star.
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB: Bright white and much fainter bluish B, wide separation.
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Gamma Her: Bright and 4x dimmer B, wide separation.
★★ nu CrB, nu 1/2 CrB, 20 CrB STFA29 AB 5m4 5m6 354.7'' 164° 2011 CrB 16h22m21.42s +33°47'56.90"
HN 81 AC 5m4 12m6 68.1'' 241° 2002
STFA29 AD 5m4 11m5 277.1'' 153° 2002
H6 18 BD 5m6 11m5 98.2'' 16° 2015
René Merting
Drachhausen (Germany)
18x70 AB: auffallend, zwei gleichhelle Sterne weit getrennt - die südliche Komponente strahlt zartgelb
Mark McCarthy
Fremont (California/USA)
317mm (553x) STFA29 (AB): Nu 2 CrB. Wide separation carbon star pair.
René Merting
Drachhausen (Germany)
320mm (72x) AB: bei 72x ein weit auseinander stehendes helles Pärchen - die nördliche Komponente ist leicht heller - diesen Doppelstern macht die relativ gleiche hellgelbe Färbung beider Komponenten aus - was diesen Doppelstern noch ausmacht, dass beide hellen Komponenten einen schwachen Begleiter haben
AC: bei 72x blinkt bei der nördlichen A-Komponente südwestlich ein schwacher Lichtpunkt auf, Abstand ordentlich
BD: bei 72x steht bei der südlichen B-Komponente ein schwacher Lichtpunkt nordöstlich, D ist etwas weiter entfernt, als der Abstand AC - ein schickes Quartett
Mark McCarthy
Fremont (California/USA)
508mm (667x) STFA29 (AD): Nu 1 CrB. Nice bright orange finder split. AD is a wide faint star in the scope
PKO15 11m0 12m2 2.5'' 32° 2015 CrB 16h22m38.86s +38°18'29.20"
Mark McCarthy
Fremont (California/USA)
508mm (667x) This is the fainter pair discussed in the last entry (KU 53). Faint, well split but closer. A star light orange, B bluish white. faint a bit hazy.
KU53 10m4 11m1 5.3'' 49° 2017 CrB 16h22m54.07s +38°15'28.70"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Double-double in field, this is the equal pair brighter white, wide. The other (PKO 15) is faint, 1 to half delta mag, closer together.
H5 38 6m4 9m8 31.1'' 16° 2015 CrB 16h22m56.50s +32°19'58.80"
René Merting
Drachhausen (Germany)
320mm (72x) bei 72x ein sehr ungleiches Paar mit mindestens 2.5 Magnituden Helligkeitsunterschied - A strahlt weiß, B wirkt dagegen grau
Mark McCarthy
Fremont (California/USA)
508mm (333x) 23 Her. wide pair, white and 3 delta mag pair.
STF2040 8m1 10m1 7.0'' 313° 2018 Her 16h23m05.73s +13°50'23.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Slightly orange A, 3 delta mag B. Wide separation
BU951 AB-C 9m3 10m1 1.0'' 30° 2016 CrB 16h23m32.23s +33°21'27.80"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Wow seeing is amazing getting airy disks 20 inch 667x, orange and blue stars, very nice split, dare I say wide (AB is near equal 0.1" pair, try again to notice out of round)
★★ STF2054 AB 6m2 7m1 1.0'' 350° 2018 Dra 16h23m47.19s +61°41'47.00"
Robert Zebahl
Leipzig (Germany)
70mm (133x) Not split in any way.
Robert Zebahl
Leipzig (Germany)
102mm (160x) Immediately visible as a double star. The diffraction disks overlapped slightly. The difference in brightness was clearly visible. Together with the nearby double star eta Dra in the same field of view, the sight was highly fascinating, as both double stars are very different in their appearance. ../projects/double-stars/robert-zebahl/sketches/2019-06-25_stf2054.jpg
Uwe Pilz
Leipzig (Germany)
105mm (198x) verformte Beugungsscheibe, auf den ersten Blick erkennbar ../projects/double-stars/uwe-pilz/sketches/stf2054.jpg
Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt
★★ STT312, eta Dra, 14 Dra AB 2m8 8m2 4.4'' 143° 2015 Dra 16h23m59.51s +61°30'50.70"
Robert Zebahl
Leipzig (Germany)
70mm (133x) Not split in any way.
Robert Zebahl
Leipzig (Germany)
102mm (160x) Easy. Very large difference in brightness. The faint companion appeared as a tiny star outside the first diffraction ring of the primary component. Highly recommended, especially with the nearby double star STF 2054! ../projects/double-stars/robert-zebahl/sketches/2019-06-25_eta_dra.jpg
STF2044 8m4 8m8 8.2'' 341° 2017 CrB 16h24m10.41s +37°02'11.90"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x stehen die Sterne sehr dicht, aber schon getrennt sichtbar - Komponente B nordöstlich strahlt nur etwas schwächer, schätzungsweise eine halbe Größenklasse
Mark McCarthy
Fremont (California/USA)
317mm (553x) Fine faint disks, nearly equal mag, wide separation, white.
Mark McCarthy
Fremont (California/USA)
508mm (333x) Nice orange and slightly blue stars, well split, near equal
★★ TDS9883 11m7 11m9 0.8'' 299° 1991 CrB 16h24m38.78s +31°59'42.90"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Very extraordinarily fine, only at the best moments, a very close pair hairline split, very faint.
BU625, ome Her AC 4m6 11m8 25.4'' 87° 2018 Her 16h25m24.93s +14°02'00.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Omega Her: Bright white and much fainter B, ~5 delta mag, wide.
★★★ rho Oph, 5 Oph H2 19 AB 5m1 5m7 3.0'' 334° 2017 Oph 16h25m35.03s -23°26'47.00"
H2 19 AC 5m1 7m3 149.2'' 2000
H2 19 AD 5m1 6m8 156.4'' 252° 2000
KOU63 CF 5m8 11m7 4.8'' 206° 2000
BU1115 DE 6m8 8m4 0.3'' 196° 2018

../images/binary-star-orbits/H2-19-AB-orbit.jpg ../images/binary-star-orbits/BU1115-DE-orbit.jpg

Stefan Loibl
Rosenheim (Germany)
102mm (102x) AB: possible components (DE) and (CF) already visible at 27x magnification with ca. 2 arcmin distance
STF2049 7m3 8m1 1.1'' 195° 2017 Her 16h27m54.63s +25°59'03.40"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Suspected elongation at 205x, split clean at 333x. Blue B, dull white A, 1 delta mag. Nice!
René Merting
Drachhausen (Germany)
320mm (320x) bei 240x ist eine 8 erkennbar, beide Komponenten berühren sich noch gerade so - B im Süden ist nur unwesentlich schwächer - bei 320x dann knappe Trennung
STF2048 AB 6m6 9m7 5.6'' 297° 2015 Oph 16h28m48.99s -08°07'43.20"
René Merting
Drachhausen (Germany)
100mm (107x) schlechtes Seeing bzw. unerwartet heftiger Tanz der Sterne - erst bei 107x kann ich Komponente B ganz schwach west-nordwestlich von A erkennen - großer Helligkeitsunterschied - die Trennung hat keine Freude bereitet
Stefan Loibl
Rosenheim (Germany)
102mm (102x) nice faint pair, both components orange
STF2052 AB 7m7 7m9 2.5'' 118° 2018 Her 16h28m52.67s +18°24'50.60"

../images/binary-star-orbits/STF2052-AB-orbit.jpg

René Merting
Drachhausen (Germany)
100mm (107x) bei 64x zwei gleichhelle Sterne, die sich gerade so berühren - bei 107x ein knapp getrenntes Pärchen, Komponente B im SO ist nur marginal schwächer
Stefan Loibl
Rosenheim (Germany)
102mm (102x) Does not appear as a multiple star at 28x, elongated at 68x, splith with 102x. Component A blueish, B reddish. Observation of component C questionable. Occasional observation of a star at the presumably correct position.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Pretty pale yellow-orange pair of equal magnitude, about 2" separation.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal orange, ~3"
Karsten Kopp
Köln (Germany)
600mm (180x) Doppelstern war noch gut zu trennen, bei fast identischer Helligkeit. Komponente A wirkt weißlich, während die etwas schwächere Komponente B gelblich orange strahlt.
STF2051 7m7 9m4 13.8'' 19° 2019 Her 16h29m25.06s +10°35'31.40"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ist Komponente B schwach nördlich von A erkennbar - Trennung eindeutig, nicht zu knapp - Helligkeitsunterschied 1.5 Größenklassen
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and blue, wide separation, 2 delta mag.
Karsten Kopp
Köln (Germany)
600mm (180x) Doppelstern ist einfach zu trennen. Helligkeitsunterschied beträgt etwas mehr als 1,5 mag und beide Komponenten erstrahlen weißlich gelb.
lambda Oph, 10 Oph, STF2055, Marfic AB 4m2 5m2 1.6'' 45° 2018 Oph 16h30m54.84s +01°59'02.80"

../images/binary-star-orbits/STF2055-AB-orbit.jpg

Stefan Loibl
Rosenheim (Germany)
102mm (205x) components cannot be split at 205x
Uwe Pilz
Leipzig (Germany)
105mm (288x) schöner Farbkontrast, lohnend. ../projects/double-stars/uwe-pilz/sketches/190721LambdaOph.jpg
Sarah Gebauer
Germany
150mm (160x) habe den Doppelstern zwar gefunden und konnte auch erkennen, dass es zwei Sterne sind, eine Trennung war aber heute Abend nicht möglich
Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt ../projects/double-stars/frederik-wanink/sketches/Marfic.jpg
STF2059 8m8 8m8 0.3'' 179° 2016 Her 16h30m55.71s +38°03'52.60"

../images/binary-star-orbits/STF2059-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) nicht als DS gesehen
Mark McCarthy
Fremont (California/USA)
317mm (553x) Overlapping disks, notched. Need perfect seeing. This was 1.2" at Struve's discovery, so easier for him to see -- I doubt he would have found it now, near its closest separation. August 2017
SHJ233 7m1 8m3 59.2'' 71° 2017 Her 16h31m30.62s +08°17'38.80"
René Merting
Drachhausen (Germany)
16x70 ein weit getrenntes Pärchen mit zwei schwachen aber noch gut erkennbaren Sternen - Komponente B ist gut 1.5 Größenklassen schwächer - unspektakulär
René Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein noch weiter auseinander stehendes Pärchen als der vorher beobachtete HV 127 gut 2,5° südöstlich - Komponente A weiß-gelblich, B um eine Größenklasse schwächer und weiß-grau
STF2056 7m8 9m2 6.8'' 313° 2015 Her 16h31m38.54s +05°26'01.30"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32 ist Komponente B knapp getrennt von A wahrnehmbar - der schwache Stern wirkt eher wie ein Schatten der Schatten von A - 64x ist dann besser und beide Sterne zeigen sich eindeutig getrennt - Helligkeitsunterschied 1.5 Größenklassen, dadurch wirkt B grau-braun gegenüber der weißlichen Komponente A
STF2063 5m7 8m7 16.2'' 196° 2019 Her 16h31m47.23s +45°35'53.80"
René Merting
Drachhausen (Germany)
100mm (20x) bei 32x zeigen sich beide Sterne mit ordentlichem Abstand - Komponente B gut 2 Größenklassen schwächer (laut Stelle Doppie sind es sogar 3 Größenklassen) - schöner Farbkontrast, B wirkt rostig braun gegen die warm-weiße Komponente A - zurück auf 20x sind beide Sterne gerade so getrennt erkennbar
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright white 2 delta mag B, wide
Karsten Kopp
Köln (Germany)
600mm (180x) Sehr einfach zu trennender Doppelstern mit einen deutlichem Helligkeitsuntschied von 3 mag. Beide Sterne leuchten weißlich.
STT313 8m0 8m3 0.9'' 128° 2018 Her 16h32m33.19s +40°06'47.70"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) mit Zwischenraum zu sehen ../projects/double-stars/frederik-wanink/sketches/STT313.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Clean split, near equal pair. Nice
STF2061 7m9 10m4 2.4'' 29° 2015 Her 16h33m12.49s +30°54'27.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice yellowish with 3 delta mag. B, ~2"
STF2068 9m0 9m1 4.9'' 254° 2018 Her 16h33m54.99s +47°16'17.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal whitish yellow, wide
STF2062 9m1 10m6 2.4'' 108° 2015 Her 16h34m44.14s +08°45'54.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) B pops into view with seeing, 2-3", 2 delta mag, very fine!
★★★ 16/17 Dra STFA30, 16/17 Dra AC 5m4 5m5 90.0'' 193° 2017 Dra 16h36m13.72s +52°55'27.80"
STF2078, 17 Dra AB 5m4 6m4 3.3'' 104° 2018
Robert Zebahl
Leipzig (Germany)
55mm (27x) STFA30 (AC): Rather wide pair with almost equal components. C component appeared slightly yellowish-orange.
Robert Zebahl
Leipzig (Germany)
55mm (71x) STF2078 (AB): Grand sight! ../projects/double-stars/robert-zebahl/sketches/2019-05-18_16_17_dra.jpg
Christopher Hay
Seeheim (Germany)
80mm (30x) 16 Dra seems more bluish than 17 Dra, the latter seems slightly yellow in comparison and is distinctly elongated. At 84x 17 Dra is cleanly split and such a delightful view together with 16 Dra that I had no desire to ramp up the magnification. All three stars belong to a physical system.
René Merting
Drachhausen (Germany)
100mm (107x) STF2078 (AB): AB: bei 64x noch ein Stäbchen, bei 107x ist B dann knapp getrennt östlich von A erkennbar - B ist auch noch relativ hell bzw. maximal eine Magnitude schwächer
AC: bei 32x weit auseinander stehend - Komponente B im Süden ist maximal eine viertel Magnitude schwächer - leichter Farbkontrast, A weißgelb und B kühlweiß
Frederik Wanink
Itterbeck (Germany)
254mm (640x) STF2078 (AB): sehr schönes Dreiersystem ../projects/double-stars/frederik-wanink/sketches/17Dra.jpg
STF2069 7m1 11m0 35.8'' 82° 2015 Her 16h36m22.34s +33°49'18.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Light orange and slightly blue, 2 delta mag, very wide.
STF2082, 42 Her 4m9 11m8 28.9'' 92° 2014 Her 16h38m44.89s +48°55'41.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 42 Her: Bright orange pair 1 delta mag in finder. The brighter star has a 3-4 delta mag very faint bluish companion, wide separation, which is AB.
STF2079 7m6 8m1 16.7'' 91° 2017 Her 16h39m36.33s +23°00'06.10"
René Merting
Drachhausen (Germany)
18x70 zwei sehr dicht zusammenstehende Sterne, knapp getrennt - die B-Komponente im Osten ist nur ganz knapp schwächer - schön fürs Fernglas
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x locker getrennt, aber richtig schön bei 32x, dann ein weit getrenntes Pärchen - Komponente B im Osten schätze ich gut eine halbe Magnitude schwächer als A ein - schöne Farbkombination, A ist gelblich-weiß, B ist zinnober
Mark McCarthy
Fremont (California/USA)
317mm (277x) Wide separation, half delta mag. A is yellowish and B slight red tint
Mark McCarthy
Fremont (California/USA)
317mm (277x) Wide separation, yellowish A about 7th magnitude, B about 8th.
René Merting
Drachhausen (Germany)
320mm (72x) bei 72x ein gut getrenntes Sternpaar, auffällig - B im Osten ist eine viertel Magnitude schwächer und strahlt graublau - A ist weiß, dadurch leichter Farbkontrast
Karsten Kopp
Köln (Germany)
600mm (180x) Einfacher Doppelstern mit geringem Helligkeitsunterschied. Beide Komponenten erstrahlen gelblich-weiß.
STF2084, zeta Her, 40 Her 3m0 5m4 1.6'' 115° 2018 Her 16h41m17.16s +31°36'09.80"

../images/binary-star-orbits/STF2084-orbit.jpg

Sarah Gebauer
Germany
100mm (136x) auf Anhieb ganz haarscharf getrennt, aber leider nur wenige Sekunden haltbar; dennoch erfolgreiche Trennung!
Robert Zebahl
Leipzig (Germany)
102mm (224x) Faint companion as distinct brightening on the first diffraction ring visible. In steadier moments visible as small, round condensation. ../projects/double-stars/robert-zebahl/sketches/2019-06-30_zeta_her.jpg
Robert Zebahl
Leipzig (Germany)
102mm (280x) After a longer, concentrated observation, a permanent brightening of the first diffraction ring of the primary component could be seen at the correct position angle. The brightening appeared only arch-shaped without any noticeable condensation. ../projects/double-stars/robert-zebahl/sketches/2019-06-25_zeta_her.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) äußerst schwierig
Uwe Pilz
Leipzig (Germany)
105mm (288x) Bei sehr ruhiger Luft ohne Probleme sichtbar, trotz der störenden Restkoma meines Refraktors ../projects/double-stars/uwe-pilz/sketches/190721ZetHer.jpg
Frederik Wanink
Itterbeck (Germany)
254mm (640x) nicht als DS gesehen
Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt ../projects/double-stars/frederik-wanink/sketches/STF2084.jpg
René Merting
Drachhausen (Germany)
320mm (320x) in der Nacht konnte ich nur bis 320x gewinnbringend vergrößern - Komponente A zeigt schöne Beugungsscheibchen, B offenbarte sich mir nicht
STF2091 8m4 9m3 0.4'' 324° 2010 Her 16h42m09.74s +41°11'42.90"

../images/binary-star-orbits/STF2091-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) nicht als DS gesehen
Mark McCarthy
Fremont (California/USA)
317mm (553x) I "see" rod shape once I know it is 0.4" separation. Marginal. (This one 1.3" at Struve's discovery, so easy for him! August 2017)
STF2085 7m4 9m2 6.0'' 310° 2019 Her 16h42m26.09s +21°35'34.30"
René Merting
Drachhausen (Germany)
100mm (64x) bei 32x leuchtet nordwestlich am Stern etwas schwach, kann aber noch nicht getrennt werden - bei 64x sind dann beide Komponenten knapp getrennt erkennbar, B ist deutlich schwächer, etwa 2 Größenklassen - Farbkontrast A weiß / B grau
Mark McCarthy
Fremont (California/USA)
203mm (205x) Interesting white and red stars, wide separation, 1 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Bright A a "ruddy" yellow orange. B about 2 magnitudes fainter, widely separated.
René Merting
Drachhausen (Germany)
320mm (72x) bei 72x ein schönes dicht zusammen stehendes Pärchen, Trennung etwas mehr als knapp - A ist weißgelb, B wirkt kupfergrau - schöner Farbkontrast
STF2087 AB 8m8 8m9 5.1'' 287° 2019 Her 16h42m34.83s +23°40'01.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal orange, wide, ~5"
Karsten Kopp
Köln (Germany)
600mm (180x) Gut zu trennender Doppelstern mit sehr geringem Helligkeitsunterschied. Beide Komponenten erstrahlen gelblich-weiß.
STF2083 AB 9m1 9m6 12.8'' 334° 2015 Her 16h42m44.12s +13°36'29.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal wide.
STF2093, eta Her AB 3m6 11m7 116.6'' 267° 2014 Her 16h42m53.76s +38°55'20.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright orange-yellow A, much fainter blue B, very wide separation
STTA149 7m2 8m4 96.2'' 134° 2019 Her 16h43m30.10s +20°42'58.00"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Wide separation, white, A about 6th magnitude, B about 7th
H5 127 7m8 9m0 53.4'' 294° 2016 Her 16h43m38.81s +06°37'06.80"
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x weit getrennt - bei 32x eine gelblich strahlende Komponente A im Osten, B westlich ist gut 1.5 Größenklassen schwächer und strahlt folgerichtig nur gräulichbraun
D15 9m0 9m3 0.6'' 335° 2016 Her 16h43m56.29s +43°28'31.20"

../images/binary-star-orbits/D15-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Light orange elongated, with notch, near equal. (0.9" at discovery).
STF2094 AB 7m5 7m9 1.0'' 76° 2018 Her 16h44m10.57s +23°31'02.80"
AC 7m5 11m7 24.9'' 312° 2015
Mark McCarthy
Fremont (California/USA)
203mm (333x) AC: Wide separation, 1 delta mag, 333x (AC seen, missed the tight A pair 1")
Mark McCarthy
Fremont (California/USA)
317mm (277x) AC: Yellow and much fainter blue wide separation.
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB: White-orange pair of equal magnitude, clean split when the seeing stills
Mark McCarthy
Fremont (California/USA)
317mm (277x) AC: ~25" separated, bluish about 3 magnitudes fainter than A
René Merting
Drachhausen (Germany)
320mm (320x) AB: bei 320x sind beide Komponenten knapp getrennt voneinander erkennbar - sie sind etwa gleich hell
STF2097 AB 9m4 9m6 1.9'' 80° 2018 Her 16h44m47.22s +35°44'16.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Four stars in the system, one pair split in 50mm finder but one of these, AB, is a near equal close pair ~2-3"
STT585, 41 Her AB 6m7 10m4 163.1'' 191° 2015 Her 16h44m59.98s +06°05'17.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 41 Her: Orange with very much fainter wide B.
STF2095 7m4 9m2 5.3'' 160° 2015 Her 16h45m05.23s +28°21'28.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice! Yellow and white pair, 2 delta mag, 4"
STF2098 AB 8m8 9m6 14.3'' 145° 2015 Her 16h45m43.47s +30°00'17.20"
AC 8m8 8m8 65.9'' 128° 2015
AD 8m8 11m0 67.6'' 18° 2015
DE 11m0 13m7 5.8'' 268° 2015
Robert Zebahl
Leipzig (Germany)
102mm (86x) Already at 28x the components A, B and C were noticeable at first view. At 86x, component D could also be observed very well. The components are all comparatively far apart. ../projects/double-stars/robert-zebahl/sketches/2019-06-23_stf2098.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: 4 stars in an arc. Assume AB is the closer pair ~1 delta mag. All wide. (5 stars in 5 pairings)
Mark McCarthy
Fremont (California/USA)
508mm (333x) AB: AB, AC, AD, four star system all within a mag of each other, forming a gentle arc. (Actually 5 stars, I missed DE which is 13th mag. Says it's physical -- all 5 are?)
John Raymond
Richmond (Virginia/USA)
Taken in 2017 with 18” Dobsonian. Single images with Canon M3 camera, <30s ../projects/double-stars/john-raymond/photographs/stf2098.jpg
STF2101 AB 7m5 9m4 4.1'' 47° 2015 Her 16h45m48.14s +35°37'50.50"
René Merting
Drachhausen (Germany)
100mm (107x) bei 64x ist Komponente B noch ein verwischtes Anhängsel an A - bei 107x zeigt sich B dann knapp getrennt von A und deutlich schwächer
Mark McCarthy
Fremont (California/USA)
203mm (333x) Orange-yellow stars well separated ~2 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and a deeper yellow. There’s an anonymous pair just west of STF 2101, a faint orange pair, looks like a 2+1 system.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Blue-white and slightly red B, 2 delta mag, wide.
Karsten Kopp
Köln (Germany)
600mm (180x) Gut zu trennender Doppelstern, mit auffälligem Helligkeitsunterschied von knapp 2 mag. Komponente A erstrahlt weiß und Komponente B gelblich orange.
SHJ239, 43 Her AB 5m3 9m3 84.1'' 229° 2016 Her 16h45m49.89s +08°34'57.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 43 Her: Bright orange and 4x fainter B, very wide separation.
AG351 10m3 10m7 3.0'' 304° 2017 Her 16h46m16.28s +24°37'33.20"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Pretty, near equal pair, 3" separated, light orange stars. In an asterism which looks like Orion, with these two forming a belt. (Surprise, this isn't physical)
CTT20 & ES1089 ES1089 AB 10m7 11m7 11.8'' 150° 2015 Her 16h46m28.63s +47°59'24.00"
ES1089 AC 10m7 12m7 32.4'' 29° 2015
CTT20 AD 10m7 10m8 71.1'' 127° 2015
CTT20 DE 10m8 12m5 27.2'' 126° 2015
CTT20 EF 12m5 12m7 34.5'' 34° 2015
René Merting
Drachhausen (Germany)
320mm (72x) DE: bei 72x sind 5 Sterne der Herkules-Box (Leiter 6) getrennt voneinander erkennbar, u.a. auch die beiden Komponenten D und E - Komponente E bildet die südliche Ecke der Box, D liegt nahe E auf der Geraden zwischen A und E
EF: bei 40x zeigt sich der Herkules-Box noch als nebliger Strich - bei 72x ist Komponente E getrennt nordöstlich von Komponente E zu erkennen - F bildet die nordöstliche Ecke des Rechtecks
René Merting
Drachhausen (Germany)
320mm (160x) AB: bei 160x wird die Herkules-Box (Leiter 6) sehr deutlich, ES 1089 zeigt sich als schön getrenntes Sternpaar im NW
AC: das einzige physikalische Doppel in dieser Sechser-Gruppierung - bei 72x können die beiden Komponenten getrennt gesehen werden, sie bilden die westliche kurze Kante des Musters Leiter 6
TDT82 11m4 11m4 0.6'' 356° 1991 Her 16h46m45.43s +27°05'26.90"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Tough, seeing and transparency not quote good enough. Suspected elongation at 333x and 667x showed one star pretty clearly but only a haze and elongation where fainter B was.
A227 10m5 10m5 2.1'' 237° 2016 Her 16h46m56.49s +27°00'59.20"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Easy near equal pair, light orange, 2"
STF2096, 19 Oph AB 6m1 9m7 23.9'' 88° 2019 Oph 16h47m09.76s +02°03'52.40"
AC 6m1 11m4 214.1'' 193° 2015
Uwe Pilz
Leipzig (Germany)
16x70 AB: äußerst schwierig; sehenswertes Sternfeld ../projects/double-stars/uwe-pilz/sketches/200725_19Oph.jpg
René Merting
Drachhausen (Germany)
100mm (20x) AB: bei 20x ein knapp getrenntes Pärchen, Komponente B ist sehr schwach - bei 32x dann deutliche Trennung und ästhetischerer Anblick - der Helligkeitsunterschied zwischen den Komponenten ist enorm, sicherlich mehr als 3 Magnituden
Uwe Pilz
Leipzig (Germany)
105mm (200x) Hauptkomponente gelb-orange ../projects/double-stars/uwe-pilz/sketches/190721_19Oph.jpg
HU666 9m3 13m1 0.5'' 226° 2008 Her 16h47m23.01s +23°00'06.20"
Mark McCarthy
Fremont (California/USA)
508mm (667x) When A star settles down to a disk, the B star is an unresolved haze in the diffraction ring, very faint.
WEI31 AB 9m9 10m1 5.0'' 317° 2018 Her 16h47m35.08s +25°38'21.60"
Mark McCarthy
Fremont (California/USA)
508mm (667x) AB, AC, BC: Two plus one system, the two closest AB nearly equal, AB a little fainter. White to yellowish white. Well separated all of them, surprised Struve missed them
BUP174, 45 Her 5m2 11m2 121.2'' 80° 2010 Her 16h47m46.43s +05°14'48.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright A and very much fainter B, wide separation.
STF2104 AB 7m5 8m8 5.7'' 18° 2018 Her 16h48m41.48s +35°55'19.30"
René Merting
Drachhausen (Germany)
100mm (64x) bei 64x zwei dicht zusammen stehende aber gut getrennte Sterne - Komponente B nordöstlich ist deutlich schwächer als A
Mark McCarthy
Fremont (California/USA)
203mm (333x) White A and slightly blue B, well separated, 2 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) White and yellow
Mark McCarthy
Fremont (California/USA)
317mm (553x) 2 delta mag, wide.
Karsten Kopp
Köln (Germany)
600mm (180x) Doppelstern ist gut zu trennen und beide Sterne erstrahlen gelblich weiß.
★★ 52 Her A1866 BC 9m5 9m6 0.3'' 266° 2012 Her 16h49m14.20s +45°59'00.40"
BU627 A-BC 4m8 8m4 2.2'' 44° 2018

../images/binary-star-orbits/A1866-BC-orbit.jpg ../images/binary-star-orbits/BU627-A-BC-orbit.jpg

René Merting
Drachhausen (Germany)
100mm (142x) BU627 (A-BC): bis 142x probiert, hat nicht funktioniert - der Helligkeitsunterschied ist vermutlich zu groß und das Beugungsscheibchen von A so hell wie BC selbst
Robert Zebahl
Leipzig (Germany)
102mm (280x) BU627 (A-BC): At 160x the faint component is already beginning to be visible as brightening in the first diffraction ring. At 280x the brightening is quite clearly visible and appears partly clear as a small knot in the first diffraction ring.
Uwe Pilz
Leipzig (Germany)
105mm (288x) BU627 (A-BC) ../projects/double-stars/uwe-pilz/sketches/52Her.jpg
Uwe Pilz
Leipzig (Germany)
120mm (180x) BU627 (A-BC) ../projects/double-stars/uwe-pilz/sketches/52Her_120_%20180x.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) BU627 (A-BC): 52 Her. Very bright white star with a companion disk 2", 4-5 delta mag. Wow! B appears as if it is illuminated by A's light. Did not detect BC, 0.3"
★★ STF2103 AB 5m9 10m0 4.9'' 43° 2018 Her 16h49m34.67s +13°15'40.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White and 4 delta mag B, 4". Nice!
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice! Pretty bright white A, much fainter 5 delta mag B, well separated, looks like a planet.
★★ STF2107 AB 6m9 8m5 1.5'' 109° 2018 Her 16h51m50.10s +28°39'58.70"

../images/binary-star-orbits/STF2107-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and orange pair, very close ~1.5", 1 delta mag. Very pretty.
Mark McCarthy
Fremont (California/USA)
508mm (667x) Nice pair yellow and slightly blue two delta mag, about 1.5" (AC is 11.5 and much further separated)
Karsten Kopp
Köln (Germany)
600mm (385x) Doppelstern ist bei 180-facher Vergrößerung gerade so als 8 zu erkennen. Bei 385-facher Vergrößerung in den seltenen Augenblicken des ruhigen Seeings gerade so eben zu trennen. Sehr schwierig auch wegen des Helligkeitsunterschied von 1,6 mag.
BU1454, 53 Her 5m4 12m5 75.4'' 64° 2014 Her 16h52m58.12s +31°42'06.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Brighter yellow-orange and much fainter bluish B, ~4 delta mag, very wide.
STF2109 7m5 10m3 5.9'' 312° 2018 Her 16h53m45.78s +21°10'22.60"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Well separated, around 2 delta mag. Surprisingly interesting pair.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Orange-yellow and much fainter B, wide separation
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and slightly green-blue, wide ~10", 4 delta mag.
Mark McCarthy
Fremont (California/USA)
508mm (667x) Yellow A and very light blue three delta mag wide separation B.
FOX196, 54 Her AC 5m5 12m5 88.4'' 318° 2015 Her 16h55m22.24s +18°25'59.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 54 Her: Very faint, averted vision only B, pretty wide split to west.
STF2118, 20 Dra AB 7m1 7m3 0.9'' 65° 2018 Dra 16h56m25.32s +65°02'20.60"

../images/binary-star-orbits/STF2118-AB-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) sehr einfach ../projects/double-stars/frederik-wanink/sketches/20Dra.jpg
STT318 7m0 9m6 2.9'' 243° 2015 Her 16h56m39.66s +14°08'24.90"
René Merting
Drachhausen (Germany)
100mm (64x) bei 64x zeigt sich das Pärchen in guten Momenten knapp getrennt - bei 107x wird Komponente B besser sichtbar, er wirkt gräulich wie ein halbdurchsichtiger Geist - die Trennung ist nun eindeutig, aber immer noch knapp - großer schwer einschätzbarer Helligkeitsunterschied zwischen A und B, gut 2.5 Größenklassen Differenz habe ich in der Nacht geschätzt, Treffer
Jörg S. Schlimmer
Germany
127mm (136x) Abstand ca. 3"Separation 3" ../projects/double-stars/joerg-schlimmer/sketches/Zeichnung%20STT318_filtered_96dpi.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty orange pair, 3 delta mag, ~3"
STT340 AB 8m4 9m2 31.4'' 221° 2015 UMi 16h57m18.06s +86°50'40.10"
René Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein feines schwaches Sternpaar, mehr als ordentlich getrennt - Komponente A ist creme-weiß, B wirkt grau und ist gut eine halbe Größenklasse schwächer - zurück auf 20-fach sind beide Sterne ebenfalls problemlos erkennbar, die Trennung ist weiterhin ordentlich
STF2112 9m7 10m3 2.1'' 263° 2018 Her 16h58m14.68s +31°47'27.60"
Uwe Pilz
Leipzig (Germany)
105mm (200x) Hauptkomponente grau-weiß ../projects/double-stars/uwe-pilz/sketches/STF2112.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint pair, 1 delta mag, ~2"
TDT163 11m5 12m4 1.2'' 276° 1991 Her 16h58m31.13s +23°50'35.70"
Mark McCarthy
Fremont (California/USA)
508mm (667x) I can pick up both stars within a haze using averted vision, one is noticeably fainter than the other. Suspect elongation with direct vision.
TDS846 9m7 11m7 1.3'' 76° 2015 Her 16h58m36.45s +26°37'00.90"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Split very briefly at finest moment, after a lot of shimmer. Near equal to half a delta mag.
HU1279 10m4 11m7 1.6'' 156° 2015 Her 16h59m44.52s +13°19'03.00"
Mark McCarthy
Fremont (California/USA)
508mm (667x) very faint, some haze, but at best moments resolved to two points in the elongated haze.
STT322 7m9 10m2 1.4'' 204° 2016 Her 16h59m46.42s +36°55'17.00"
Mark McCarthy
Fremont (California/USA)
203mm (333x) For certain can see it with 20" at 333x, but the star images are bloated due to seeing. The 8" inch mask cleans the image up but the B star is considerably fainter. 3-4 delta mag 1.5" with 333x in 8 inch. B star looks blue.
H4 122, V451 Her 6m3 10m3 18.9'' 238° 2015 Her 17h01m33.05s +14°56'59.00"
Jörg S. Schlimmer
Germany
127mm (136x) high contrast ../projects/double-stars/joerg-schlimmer/sketches/Zeichnung%20H%204%20122_filtered_96dpi.jpg
J739 9m1 10m5 2.8'' 159° 2016 Her 17h01m41.52s +34°59'02.30"
Mark McCarthy
Fremont (California/USA)
508mm (333x) I sensed elongation with the 8 inch mask at 333x, but it was a haze only flashing elongation with averted vision. With the 20 inch the a star resolved, orange, and the B was noticed at 3" but was considerably fainter, I would guess 1.5 to 2 delta mag.
J740 10m2 10m9 2.8'' 224° 2017 Her 17h03m14.59s +34°58'55.60"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Well spilt, obvious at 20" 333x light orange and yellow stars.
STFA33 AB 5m9 6m2 304.9'' 117° 2014 Her 17h03m39.31s +13°36'19.50"
Mark McCarthy
Fremont (California/USA)
80mm (13x) 80mm finder split, equal white.
★★ BU822 AB 6m6 9m9 1.4'' 227° 2010 Her 17h03m52.67s +19°41'25.80"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Bright orange star with a consistent pin-prick point of light, stays still in occasional seeing shimmer. Fainter than PRY 2's B. ~1.5”. In same field as PRY 2, same PA as PRY 2's.
ES634 10m8 11m6 2.1'' 93° 2015 Her 17h04m00.87s +42°11'46.90"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Half delta mag, well split white orange and light orange stars
★★ PRY2 AB 6m2 9m3 1.8'' 227° 2012 Her 17h04m41.34s +19°35'56.70"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Blue-white and slightly reddish B, 3-4 delta mag, 1.5”. Not hard at all! Makes a double-double with BU 822 at 277x
STF2120 AB 7m4 9m2 24.5'' 231° 2015 Her 17h04m45.80s +28°05'27.70"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x steht B gut abgesetzt im Südwesten von A und ist gut 2 Größenklassen schwächer - A ist weiß, B wirkt grau - ein unauffälliges Paar
★★ mu Dra, 21 Dra, Alrakis, Arrakis STF2130 AB 5m7 5m7 2.5'' 2018 Dra 17h05m20.20s +54°28'14.30"
BU1088 AC 5m7 13m7 12.2'' 174° 2015

../images/binary-star-orbits/STF2130-AB-orbit.jpg

Christopher Hay
Seeheim (Germany)
80mm (100x) In May 2019 neatly split, no colours seen. A physical system with a period of 812 years. Periastron was in 1946, since then the distance is widening to reach 2.7“ in 2025 and 2.8“ in 2030
René Merting
Drachhausen (Germany)
100mm (107x) AB: bei 107x zeigen sich zwei knapp getrennte Perlchen, beide gleichhell und weiß schimmernd - ein schickes Paar
Robert Zebahl
Leipzig (Germany)
102mm (125x) AB: Easy to separate. Beautiful sight. Components equally bright with no discernible color difference.
Frederik Wanink
Itterbeck (Germany)
254mm (460x) AB: gleich hell ../projects/double-stars/frederik-wanink/sketches/STF2130.jpg
STF2122 6m4 9m7 20.3'' 279° 2015 Oph 17h06m52.94s -01°39'22.00"
Uwe Pilz
Leipzig (Germany)
16x70 konzentriertes Schauen erforderlich; der helle ist gelb ../projects/double-stars/uwe-pilz/sketches/200725_STF2122.jpg
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x zeigt sich das Pärchen gut getrennt, B segelt sichtbarkeitstechnisch hart am Limit - bei 32x ist Komponente B im Westen weiter sehr schwach bzw. mindestens 2 Größenklassen schwächer - schöner Farbkontrast, weiß-gelb vs. grau-blau
Mark McCarthy
Fremont (California/USA)
203mm (333x) Pale yellow and wide separated B, 2 delta mag.
STT324 6m0 10m7 3.6'' 222° 2016 Her 17h08m00.70s +31°12'22.50"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Very interesting. At 20 inch the a star was orange and bloated with the seeing, did not notice a pair. I used the 8 inch mask which tightened the A star up considerably, then with averted vision could discern a very faint small glow in one particular direction, but could not hold it direct. Back to the 20" and now in good moments I can see the B star quite well, 5 delta mag, bluish. 333x
A1145 6m3 7m8 0.7'' 340° 2018 Oph 17h08m13.65s -01°04'46.10"

../images/binary-star-orbits/A1145-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (667x) Marginal observation of a very faint, very close-in star which briefly resolves as a point and not a flare.
SLE79 AB 12m1 12m3 9.0'' 219° 2015 Her 17h09m09.66s +33°41'32.50"
Mark McCarthy
Fremont (California/USA)
508mm (333x) 12th mag pair not so difficult when widely separated like this. Light orange near equal stars very widely split. Forms a triangle with two other stars. (not a physical pair)
TDT236 11m4 11m6 0.7'' 24° 1991 Her 17h09m19.96s +33°38'32.20"
Mark McCarthy
Fremont (California/USA)
508mm (667x) At very best moments which last just a second, can see the hazy elongation resolve into hairline split. Unequal by a mag. I dare not try higher power. This was one of the triangle stars mentioned in the SLE 79 entry.
eta Oph, 35 Oph BU1118 AB 3m0 3m3 0.5'' 229° 2018 Oph 17h10m22.66s -15°43'30.50"
BU1118 AB-C 2m4 12m3 99.8'' 148° 2012
BU1118 AD 2m4 11m2 101.2'' 281° 2012
DAL52 AE 2m4 11m1 62.7'' 317° 2012

../images/binary-star-orbits/BU1118-AB-orbit.jpg

Stefan Loibl
Rosenheim (Germany)
102mm (205x) B component recognizable in the airy disk, E component not visible
SHY713 6m2 7m0 195.5'' 74° 2015 Her 17h11m03.17s +24°14'15.40"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Nice wide 80mm finder split, near equal mag yellow stars.
Mark McCarthy
Fremont (California/USA)
317mm (277x) 80mm Finder split. within half magnitude of each other, yellow-orange, color more apparent at 277x.
STF2142 AB 6m2 9m3 4.9'' 110° 2018 Her 17h11m40.26s +49°44'46.70"
René Merting
Drachhausen (Germany)
100mm (64x) bei 64x offenbart der Stern seine Doppelsternseele - östlich von Komponente A ist knapp getrennt ein ganz schwacher Lichtpunkt sichtbar - gut 3-4 Größenklassen Unterschied zwischen den beiden - ein ungleiches Paar, aber schön anzusehen
Karsten Kopp
Köln (Germany)
600mm (180x) Doppelstern konnte gut getrennt werden. Der Reiz bei diesem Doppelstern liegt bei dem sehr deutlichen Helligkeitsunterschied von über 3 mag. Komponente A erstrahlt weißlich und Komponente B leicht rötlich.
STF2135 AB 7m6 8m9 8.7'' 195° 2018 Her 17h12m06.06s +21°13'44.40"

../images/binary-star-orbits/STF2135-AB-orbit.jpg

René Merting
Drachhausen (Germany)
100mm (32x) bei 64x ein locker getrenntes Pärchen - Komponente B im Süden halb so hell wie A - zurück auf 32x sind beide Sterne als enges Pärchen erkennbar, nicht zu knapp getrennt - noch weiter zurück auf 20x sehe ich ein längliches Sternchen, Trennung bei dieser Vergrößerung noch nicht möglich
Mark McCarthy
Fremont (California/USA)
203mm (667x) Pretty yellow star with widely separated 2 delta mag bluish B. (Not physical)
Mark McCarthy
Fremont (California/USA)
317mm (553x) Dull orange and almost green B, wide, 2 delta mag.
WFC189 10m0 10m6 6.7'' 302° 2018 Her 17h12m11.20s +21°36'39.20"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Faint near equal half delta mag blush stars, wide
ALI604 9m7 11m9 11.3'' 176° 2017 Her 17h12m57.15s +36°56'17.70"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Orange and slight blue well separated, 2 delta mag.
TDS857 11m5 12m4 1.1'' 198° 1991 Her 17h13m03.99s +35°58'43.00"
Mark McCarthy
Fremont (California/USA)
508mm (667x) VZ Her.Tough, faint pair averted brightens the elongated haze, when seeing stills there are points very tight 1"
STF2146 AC 7m0 8m9 89.3'' 235° 2016 Dra 17h13m06.26s +54°08'20.90"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x zeigt sich Komponente C komfortabel getrennt südwestlich von A - Helligkeitsunterschied eine Magnitude (1.92 mag laut Stelle Doppie) - auf B leider nicht geachtet und bei 107x auch noch nicht erkannt
STF2137 9m2 10m0 4.1'' 145° 2017 Her 17h13m53.67s +15°57'03.20"
Mark McCarthy
Fremont (California/USA)
203mm (667x) V655 Her. B pretty faint, wide separation, white stars.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Easy if faint pair, 1 delta mag, 4"
BU44 AB 9m2 9m7 5.6'' 18° 2018 Her 17h13m55.16s +28°48'09.00"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Two plus one system, the closest (AB) 1 delta mag, the further pair (AC) fainter still. wide all (Not physical)
★★ HO557, AK Her 8m6 12m0 4.5'' 323° 2015 Her 17h13m57.81s +16°21'01.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) B only visible with averted vision. As I drift from averted back to direct the star fades and I can only hold direct for a moment before it disappears. Very interesting effect. ~5” and 4 delta mag.
★★ STF2140, alpha Her, 64 Her, Ras Algethi AB 3m5 5m4 4.8'' 105° 2018 Her 17h14m38.86s +14°23'24.90"

../images/binary-star-orbits/STF2140-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
55mm (41x) Well split with noticeable difference in brightness.
René Merting
Drachhausen (Germany)
100mm (64x) bei 32x ist noch nichts erkennbar - bei 64x wird östlich von Rasalgethi der schwache Begleiter B knapp getrennt sichtbar - A ist strahlend gelb, B mit einer Tendenz zum gelb, eher ein warmes weiß
Uwe Pilz
Leipzig (Germany)
105mm (88x) himmelblau und hellgelb, getrennt bei 53x ../projects/double-stars/uwe-pilz/sketches/191025_alphaHer.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) gelb-lachsfarben
Robert Zebahl
Leipzig (Germany)
120mm (100x) Easily split with noticeable difference in brightness. A: intensively orange colored, B: slightly orange.
Karsten Kopp
Köln (Germany)
140mm (94x) Konnte erst mit 94-facher Vergrößerung gut getrennt wahrgenommen werden.
Sarah Gebauer
Germany
150mm (85x) bei Halbmond auf der Schwäbischen Alb: sehr eng, aber sauber getrennt, eine Komponente ist viel heller und größer, mein Farbeindruck ist allerdings unerwartet eher gelb
Sarah Gebauer
Germany
150mm (160x) richtig gold, es strahlt mich richtiggehend an, auch sehr schön getrennt, ein toller Doppelstern! ../projects/double-stars/sarah-gebauer/sketches/20200805%20Alpha%20Her%20DSk.jpg
Mark McCarthy
Fremont (California/USA)
203mm (667x) Rasalgethi. 8" inch mask due to seeing. AB orange and blue 4 delta mag. Faint AD seen very wide separation. pretty star.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) gelblich und bläulicher Stern ../projects/double-stars/frederik-wanink/sketches/AlphaHer.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) Rasalgethi, Bright orange A & pale green much fainter B. Very nice!
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright orange and blue-green-grey B.
Karsten Kopp
Köln (Germany)
600mm (135x) Leicht zu trennen. Komponente A erscheint orange, Komponente B gelblich.
Karsten Kopp
Köln (Germany)
600mm (180x) Doppelstern ist gut zu trennen. Komponente A erstrahlt orange und Komponente B gelblich. ../projects/double-stars/karsten-kopp/sketches/STF2140.jpg
Jens Leich
Germany
130mm ../projects/double-stars/jens-leich/photographs/Doppelstern_Rasalgethi_Herkules_220719_2159UT_RGB.jpg
★★ STF3127, delta Her, 65 Her AB 3m1 8m3 13.5'' 292° 2018 Her 17h15m01.92s +24°50'22.50"
René Merting
Drachhausen (Germany)
100mm (64x) was für ein schönes ungleiches Paar - bei 64x präsentiert sich Komponente A gleißend hell und weiß, B zeigt sich gut abgesetzt westlich von A - zurück auf 32x habe ich bei der Strahlkraft von A keine Chance mehr, B zu erkennen - sehr schick ab 64x
Stefan Loibl
Rosenheim (Germany)
102mm (68x) Faint component B is not visible at 26x. At 68x B is visible and split. Component A yellowish. ../projects/double-stars/stefan-loibl/sketches/DeltaHer_20200601.jpg
Robert Zebahl
Leipzig (Germany)
102mm (86x) Easy. Pretty wide apart with large difference in brightness. ../projects/double-stars/robert-zebahl/sketches/2019-06-23_delta_her.jpg
Mark McCarthy
Fremont (California/USA)
203mm (667x) Very bright yellow white A and bluish B at least four delta mag, wide separation. I don't think it would be seen but for the mask tightening A's diffraction
Mark McCarthy
Fremont (California/USA)
317mm (277x) Delta Her: Nice wide pair, good image quality, yellow and lighter yellow
Mark McCarthy
Fremont (California/USA)
317mm (553x) Sarin. Very bright and much fainter B, looks like a planet
Karsten Kopp
Köln (Germany)
600mm (180x) Doppelstern gut zu trennen. Der Reiz von diesem Doppelstern liegt im schon extremen Helligkeitsunterschied von über 5 mag. Komponente A erstrahlt weiß und die Komponente B leicht rötlich.
SHJ243, 36 Oph AB 5m1 5m1 5.1'' 140° 2017 Oph 17h15m20.78s -26°36'06.10"
AC 5m1 6m5 731.6'' 74° 2000
AD 5m1 7m8 276.9'' 338° 2000
AE 5m1 12m3 38.2'' 313° 2000

../images/binary-star-orbits/SHJ243-AB-orbit.jpg

Stefan Loibl
Rosenheim (Germany)
102mm (68x) Komponente AB separated at 68x magnification, componente C at greater distance of 12.2 arcmin
HU489 10m4 10m8 1.0'' 36° 2015 Her 17h15m32.00s +20°06'56.80"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Elongation with eight inch mask but not split 667x
★★ STT328, 68 Her 4m7 10m3 4.5'' 56° 2017 Her 17h17m19.57s +33°06'00.40"
René Merting
Drachhausen (Germany)
100mm (142x) erst bei 142x ist B ganz selten als schwacher Begleiter nordöstlich von A zu erkennen - schwierig
Mark McCarthy
Fremont (California/USA)
317mm (277x) Very bright A & much fainter B, fairly widely separated.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint but steadily held B, ~8", 4 delta mag. Nice!!
STF2147 7m1 11m0 3.0'' 93° 2011 Her 17h17m34.65s +28°54'47.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) V944 Her Orange and much fainter B, 3 delta mag, PA to east, wide separation.
HDS2446 4m6 8m5 0.9'' 143° 2010 Her 17h17m40.25s +37°17'29.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 69 Her: Bright A and very faint B, 4 delta mag, well split
HO67 AB 9m2 12m4 8.0'' 276° 2015 Her 17h17m44.24s +35°37'02.90"
Mark McCarthy
Fremont (California/USA)
508mm (667x) barely visible B star with 8" mask so went up to 20, obvious, wide, white and blue star, three delta mag (Missed the COU 993 split 1" 11.3 mag)
S686 8m2 9m3 50.0'' 2015 Her 17h17m48.11s +28°44'00.40"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein weit auseinander stehendes Pärchen - B ist eine halbe Größenklasse schwächer (1.13 mag laut Stelle Doppie) - leichter Farbkontrast, nicht greifbar
BU45 10m0 10m6 4.8'' 291° 2018 Her 17h17m57.85s +32°29'13.40"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Easy pretty wide pair, half delta mag, white stars.
omicron Oph, 39 Oph, H3 25 5m2 6m6 10.0'' 354° 2015 Oph 17h18m00.71s -24°17'12.80"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) Farbkontrast wohl wegen südl.Stellung nicht zu sehen ../projects/double-stars/frederik-wanink/sketches/OmiOph.jpg
TDS860 11m0 11m2 1.6'' 61° 2015 Her 17h18m07.56s +48°03'24.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Easy near equal wide orange stars. well split
★★ HEI246 11m0 11m5 0.7'' 32° 1994 Her 17h18m13.17s +15°58'13.70"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Wow! very nice just nearly unequal close but well split orange stars. one is obviously fainter than the other but not by much
SLE13 10m1 11m7 11.3'' 310° 2015 Her 17h18m17.06s +19°12'14.00"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Well separated one delta mag blue white stars. (not physical)
★★★ BU628 9m5 9m6 0.6'' 262° 2016 Her 17h18m22.22s +32°39'38.50"

../images/binary-star-orbits/BU628-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (1067x) Wow split clean, amazing. No resolution at 667x but at 1067x two airy disks, sep by half disk, half delta mag. Remarkable
STTA152 7m7 9m8 52.8'' 47° 2015 Her 17h18m40.24s +21°46'18.70"
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x zwei schwache Sterne ordentlich weit getrennt voneinander - B im NO ist gerade so sichtbar und dürfte gut 1.5 mag schwächer sein als A - bei 32x wird die Sichtbarkeit von B besser
STF2154 AB 9m1 10m0 1.7'' 253° 2015 Her 17h18m58.68s +44°07'54.70"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Pretty light yellow stars, one and half delta mag, wide separation. nice airy disks.
BU630 9m6 11m6 1.5'' 223° 2015 Her 17h19m15.09s +32°20'15.10"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Pretty light orange and bluish stars, well sep 1.5", 2 delta mag.
TDT304 11m7 12m5 3.1'' 130° 2015 Her 17h19m32.83s +33°21'54.90"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Obvious pair if a little faint. wide separation, half a delta mag
TDT309 12m2 12m3 1.0'' 48° 1991 Her 17h19m39.37s +19°46'37.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) very faint, elongated small haze most of the time resolving slightly to balls briefly. very small.
★★★ COU994 9m4 11m2 0.5'' 214° 2011 Her 17h19m44.04s +37°02'37.30"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) At very best moments A presents a perfect disk, and a point resolves within the first faint diffraction ring, very faint and small Amazing.
COU2625 10m5 11m5 2.3'' 2017 Her 17h19m51.27s +18°05'48.00"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Very fine, again a bit of a haze then second star resolves with averted vision. close but well split 2 sec. seems unequal mag.
★★★ A2088 9m9 10m0 0.4'' 2011 Her 17h20m32.37s +47°38'51.50"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) sharp and clean split in best moments, seeing lasts a couple seconds. Otherwise it's touching disks.
DON832, xi Oph AB 4m4 8m9 4.1'' 27° 2015 Oph 17h21m00.37s -21°06'46.50"

../images/binary-star-orbits/DON832-AB-orbit.jpg

Stefan Loibl
Rosenheim (Germany)
102mm (205x) fainter 9 mag component not visible
RAG9 AB 6m3 11m9 46.3'' 146° 2012 Oph 17h22m51.29s -02°23'17.40"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Light orange star, with some faint stars nearby. (AB seen. AC is 0.7" 11.9/12.0 and definitely worth another look! CDSA: "Local, solar type 1+2 triple with low mass binary companion, sparse field. AB ps = 1,120 AU (2012).")
COU1777 11m5 11m5 0.5'' 46° 2010 Her 17h22m53.41s +47°23'21.90"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) An elongation in a haze, equal, not quite resolving
A2183 7m7 10m6 1.2'' 137° 2017 Her 17h23m30.10s +16°54'10.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Suggestion of a brightening in the diffraction, marginal
STF2161, 75 Her, rho Her AB 4m5 5m4 4.1'' 321° 2018 Her 17h23m40.97s +37°08'45.30"
Robert Zebahl
Leipzig (Germany)
55mm (38x) Very nice view. Easily split with visible difference in brightness. Pretty tight. Component A appeared rather white, B slightly yellowish. The double star forms with two other, fainter field stars a conspicuous, acute-angled triangle, whereby the double star marks the tip.
René Merting
Drachhausen (Germany)
100mm (64x) bei 107x sind beide Komponenten klar getrennt erkennbar - Komponente B im NW ist eine knappe Größenklasse schwächer - A creme-weiß, B kühler weiß-bläulich - zurück auf 64x kann ich den Doppelstern auch schon ganz knapp getrennt erkennen, da war ich wohl nicht mutig genug, dass ich mit 107x begonnen habe
Sarah Gebauer
Germany
150mm (170x) der typische Doppelstern für mich, er bildet mit zwei ählich hellen Sternen ein schönes, langes und spitzes Dreieck ../projects/double-stars/sarah-gebauer/sketches/20200723%20Rho%20Her%20DSk.jpg
Mark McCarthy
Fremont (California/USA)
203mm (667x) Rho Her. Light yellow white stars 1 delta mag well separated.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright white, 1 delta mag, ~4"
STF2164 AB 8m2 9m8 9.3'' 13° 2018 Her 17h23m44.61s +47°16'14.30"
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x ist Komponente B nördlich von A knapp getrennt erkennbar - B ist so schwach, ich habe das Gefühl, der Schlingel will sich hinter Komponente A verstecken - Helligkeitsunterschied gut 1.5 bis 2 Größenklassen
STT329 6m3 9m9 33.5'' 12° 2012 Her 17h24m27.11s +36°57'06.90"
René Merting
Drachhausen (Germany)
18x70 mit etwas Geduld ist nördlich von A die B-Komponente gut abgesetzt und sehr schwach erkennbar - sehr großer Helligkeitsunterschied
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ist Komponente B ganz schwach erkennbar in einem ordentlichen Abstand zu A - Helligkeitsunterschied knapp 3 Größenklassen (3.5 mag lt. Stelle Doppie)
Mark McCarthy
Fremont (California/USA)
317mm (553x) Wide pair, orange and blue 2-3 delta mag, wide separation
STF2160 6m4 9m3 3.9'' 66° 2017 Her 17h24m33.80s +15°36'21.70"
René Merting
Drachhausen (Germany)
100mm (107x) bei 64x zeigt sich Komponente B sehr schwach nordöstlich von A, Trennung noch nicht möglich - bei 107x knappe Trennung - B sticht nur mit viel Konzentration hervor, Komponente A ist einfach zu dominant
Mark McCarthy
Fremont (California/USA)
317mm (553x) White with 4 delta mag reddish B. Nice.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright white A, fainter and reddish B, well split.
Mark McCarthy
Fremont (California/USA)
508mm (667x) Pretty light yellow white and slightly blue B, three delta mag, well separated pair.
KUI81, V640 Her AB 6m3 14m9 8.5'' 217° 1958 Her 17h25m54.36s +16°55'03.20"
AC 6m3 13m8 23.2'' 218° 2014
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: V640 Her: Orange with two much fainter stars in a line, well separated. AB & AC seen. A is on one side, then B, then C.
Mark McCarthy
Fremont (California/USA)
317mm (553x) AC: V640 Her: Orange with two much fainter stars in a line, well separated. AB & AC seen. A is on one side, then B, then C.
HEI247 10m5 10m9 2.1'' 103° 2015 Her 17h26m00.60s +14°23'45.40"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Very nice near equal well separated light orange stars.
STF2165 AB 7m7 9m6 10.3'' 61° 2015 Her 17h26m13.76s +29°27'20.40"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x zeigt sich ein schönes enges Pärchen, knapp getrennt und ohne Konkurrenz im Umfeld - Komponente B im Osten ist gut 1.5 Magnituden schwächer
★★ A2184 & LBU5 A2184 AB 7m3 10m6 1.6'' 41° 2018 Her 17h27m32.79s +16°27'24.50"
LBU5 AC 7m3 11m5 49.3'' 259° 2015
Mark McCarthy
Fremont (California/USA)
317mm (553x) LBU5 (AC): Was trying for A 2184, but it is 2" and 3.26 delta mag, and I did not see. Wide faint pair LBU 5 seen
Mark McCarthy
Fremont (California/USA)
508mm (667x) A2184 (AB): Wow! real nice when seeing stills and with some critical focusing the diffraction of the star tightens and the three delta mag B shows on its own as a sharp point well separated and round. Really great view
STF2166 7m2 8m6 27.2'' 282° 2015 Oph 17h27m52.25s +11°23'25.80"
Uwe Pilz
Leipzig (Germany)
105mm (88x) trennbar bei 22x ../projects/double-stars/uwe-pilz/sketches/191025_STF2166.jpg
Mark McCarthy
Fremont (California/USA)
203mm (333x) White and slight off-white wide separation B.
STF2180 7m8 8m1 3.0'' 260° 2018 Dra 17h28m58.17s +50°52'13.00"
René Merting
Drachhausen (Germany)
100mm (64x) Zenitbeobachtung - bei 32x eine Andeutung, dass der Stern nicht ganz rund ist - bei 64x zwei extrem knapp getrennte annähernd gleich helle Sterne - bei 107x sind beide Protagonisten etwas besser getrennt, B ist eine viertel Größenklasse schwächer
STF2178 AB 7m3 9m1 10.6'' 129° 2018 Her 17h29m28.15s +34°56'19.00"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ist B hauchzart südöstlich von A wahrnehmbar - gut 1,5 bis 2 Größenklassen Helligkeitsunterschied - A schimmert gelblich, B ist farblos
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and bluish, ~12", 2 delta mag.
BU1089 6m6 9m0 1.4'' 321° 2005 Oph 17h29m47.34s -05°55'10.10"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Very fine point resolves next to a much brighter star. Well separated but a fine sight. With seeing.
STF2181 AB 7m0 10m5 33.0'' 328° 2015 Her 17h31m42.54s +30°19'05.30"
AC 7m0 12m6 37.7'' 218° 2015
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB: Brighter yellow-red A and two stars, both rather faint, about the same separation but 120 degrees apart in PA.
Mark McCarthy
Fremont (California/USA)
317mm (277x) AC: Brighter yellow-red A and two stars, both rather faint, about the same separation but 120 degrees apart in PA.
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Orange with ~2 delta mag pair
STT331, V2373 Oph AB 7m7 8m8 1.0'' 353° 2016 Oph 17h32m02.86s +02°49'25.40"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Slight red and pale blue, half delta mag, very tight ~1" (AB). +1 with wide star as faint as B (AC).
★★ STFA35, nu Dra, nu 1/2 Dra, 24/25 Dra 4m9 4m9 62.1'' 311° 2017 Dra 17h32m15.88s +55°10'22.10"
Christopher Hay
Seeheim (Germany)
6x20 Split, but not the fine sight it becomes in the 10x42.
Christopher Hay
Seeheim (Germany)
10x42 Clearly split, components of identical brightness, no colour. One of the finest doubles for 10x.
René Merting
Drachhausen (Germany)
16x70 der Doppelstern ist bereits mit bloßem Auge zu erkennen, im FG dann offenbart sich ein ordentlich getrenntes Pärchen zweier gleich heller Sterne
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein schönes, auffallendes Pärchen zweier gleich heller Sterne - beide sind komfortabel getrennt erkennbar und präsentieren sich weiß
Robert Zebahl
Leipzig (Germany)
102mm (28x) Wide, bright, equal pair. Both components looked cream-white. Due to the distance a double for binoculars.
Christopher Hay
Seeheim (Germany)
125mm (80x) Gorgeous sight, widely split, dominating the FOV. The more northern B-component (=Nu1 Dra = 24 Dra) appears brighter and more yellowish than the A-component (=Nu2 Dra = 25 Dra).
Sarah Gebauer
Germany
150mm (85x) auf den ersten Blick "zwei Augen", die mich anleuchten, ansonsten aufgrund der wenigen Feldsterne eher unspektakulär ../projects/double-stars/sarah-gebauer/sketches/20200624%20Ny%20Dra%20DSk.jpg
SHY726 7m9 8m6 229.2'' 12° 2015 Oph 17h33m52.81s +08°06'13.50"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Pretty yellowish-white A star and a very wide separated 1 delta mag bluish B.
COU627 9m9 10m9 2.2'' 145° 2012 Her 17h33m55.48s +17°46'40.80"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Great looking orange pair near equal. nice
★★★ COU1594 10m7 10m6 0.5'' 332° 2010 Her 17h33m59.60s +44°28'45.60"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Needed to wait for seeing but a very extraordinarily fine point resolves with the best seeing, seems much fainter than data but it's definitely there, a hard point.
FUR2 10m8 11m4 2.1'' 51° 2015 Her 17h34m21.47s +39°03'29.00"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Well separated one delta mag light orange stars
STFA34, 53 Oph AB 5m8 7m5 41.6'' 191° 2018 Oph 17h34m36.69s +09°35'12.20"
René Merting
Drachhausen (Germany)
16x70 gut getrenntes Pärchen, bei dem Komponente B im Süden deutlich schwächer und grau gegenüber A wirkt
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x weit getrenntes helles Pärchen, wobei Komponente B im Süden gut 1.5 Größenklassen schwächer - Komponente weiß-gelb, B gräulich
Uwe Pilz
Leipzig (Germany)
105mm (88x) weiß und blaugrau. Trennbar bei 22x ../projects/double-stars/uwe-pilz/sketches/191025_53Oph.jpg
STF2185 AB 7m5 10m3 27.2'' 2015 Oph 17h34m48.53s +06°01'25.80"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Finder split of bright stars, but AB is a faint star to the side of one of these seen in the scope, 2 delta mag, wide (many other pairings. CDSA "High CPM, solar type (2)+1 triple, AB ps = 3,440 AU 2013).")
STF2186 8m2 8m4 3.0'' 78° 2017 Oph 17h35m50.43s +00°59'47.70"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Near equal, well separated.
COU807 10m6 10m6 0.7'' 143° 2008 Her 17h35m54.89s +32°05'25.70"
Mark McCarthy
Fremont (California/USA)
508mm (667x) definite elongation but mostly a tiny smear.
STF2190 AB 6m1 9m5 10.4'' 22° 2015 Her 17h35m59.56s +20°59'46.60"
René Merting
Drachhausen (Germany)
100mm (64x) bei 32x sollten beide Sterne schon getrennt zu sehen sein, es ist aber nur A erkennbar - bei 64x wird B ganz schwach sichtbar, beide Sterne sind schon gut getrennt - B ist so schwach im Vergleich zu A, ich schätze es sind mindestens 3 Größenklassen Unterschied - ein reizendes Pärchen und hier ist ganz klar, wer hier die Hosen anhat
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright yellow A and fainter blue B. Wide separation.
Mark McCarthy
Fremont (California/USA)
508mm (333x) Pretty yellow A and slightly red B, wide, 3 delta mag.
COU1595 8m9 10m7 0.5'' 265° 2010 Her 17h36m29.51s +45°43'13.80"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Very close, extremely faint B resolves persistently within first diffraction, slightly hazy, with best moments.
ES636 10m5 11m4 2.0'' 124° 2008 Her 17h36m34.70s +41°42'45.70"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Rather wide separation near equal stars.
POU3299 11m3 12m2 11.5'' 176° 2015 Her 17h36m52.56s +24°16'10.60"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Near equal twelfth magnitude stars, wide. Transparency making them hazy, seeing not perfect. (not physical.)
TDT433 12m1 13m0 1.8'' 105° 1991 Her 17h36m53.83s +23°36'32.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) I can flash an elongation to the smear with averted vision, but that's all, no resolution of the disks. Transparency, seeing, and waxing crescent moon limiting.
AG210 AB 10m1 10m3 4.2'' 189° 2016 Her 17h37m48.70s +22°57'20.10"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Easy pair, wide, striking yellow orange colors, appears near equal not one delta mag as per SkyTools data (FYM 246 AC 14.1 mag 11.2" not noticed, beyond the 20" in these conditions)
POU3302 12m3 12m5 8.6'' 203° 2015 Her 17h37m50.88s +23°23'19.00"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Easy wide separated, half delta mag, maybe a third not more than half additional distance at ninety degrees, 13th mag [third not in system]
HO69 8m7 12m5 1.9'' 139° 2007 Her 17h38m05.67s +36°55'22.00"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Very, very faint, slightly hazy round star appears just outside A's first diffraction ring. Very difficult needed to wait for best seeing.
SHJ251 AB 6m4 7m8 111.3'' 328° 2015 Oph 17h39m08.48s +02°01'41.20"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Orange stars, finder split, 1.5 delta mag.
STF2191 AB 7m8 8m5 26.3'' 267° 2015 Oph 17h39m47.28s -04°58'04.80"
Uwe Pilz
Leipzig (Germany)
16x70 schwierig aber sehenswert ../projects/double-stars/uwe-pilz/sketches/200725_STF2191.jpg
Mark McCarthy
Fremont (California/USA)
203mm (667x) Wide separation near equal (AB seen. BC is Ho 419 12.71 7.6" not seen)
TDT458 11m9 12m7 2.6'' 302° 2015 Her 17h40m13.92s +23°17'42.10"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Quite close but well split, ~3", 1 delta mag. [not physical]
BRT2436 10m9 10m9 5.6'' 187° 2015 Her 17h40m25.45s +21°44'19.40"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Obvious pair in center of triangle of stars, half delta mag, pretty wide, ~6" separation.
AG211 9m6 9m8 2.7'' 131° 2016 Her 17h40m37.12s +20°16'44.20"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Wide, half delta mag, white stars. Pretty pair [too bad, not physical]
STTA157 AB 6m4 7m9 118.3'' 106° 2015 Her 17h40m41.23s +31°17'15.60"
Mark McCarthy
Fremont (California/USA)
80mm (13x) Orange and blue, separated in finder.
Mark McCarthy
Fremont (California/USA)
508mm (333x) Very pretty light orange and very wide separated blue, about 1 delta mag. [Aa,Ab is 0.8" 10.3, should have tried for it]
STF2194 AB 6m5 9m3 16.5'' 2018 Her 17h41m05.50s +24°30'47.20"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x zeigt sich B ganz schwach und zart nördlich von A - mindestens 2.5 Magnituden Helligkeitsunterschied - A weißgelblich, B ist farblos
Mark McCarthy
Fremont (California/USA)
203mm (333x) Orange and light blue, wide separation, ~2 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Pretty orange and blue, 2 delta mag, very wide. 83 Her nearby is a reddish-orange color.
Mark McCarthy
Fremont (California/USA)
317mm (277x) a pretty orange and blue pair, 3 magnitude difference, nicely separated
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and blue, fairly wide, 1-2 delta mag.
STF2203 7m7 7m8 0.8'' 292° 2018 Her 17h41m13.81s +41°39'17.80"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt ../projects/double-stars/frederik-wanink/sketches/STF2203.jpg
STF2196 10m2 12m2 3.3'' 257° 2018 Her 17h41m37.08s +21°11'14.80"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Faint for a Struve. 10th and 12th mag, two delta mag, about 4" sep. Easily spotted in field.
ROE119 11m5 11m7 4.4'' 324° 2015 Her 17h41m42.33s +28°31'37.40"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Very fine near equal, widely separated, about 4". [not physical]
STF2197 10m6 11m0 8.1'' 356° 2018 Her 17h41m49.76s +21°25'54.70"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Seems closer mag than SkyTools data. Wide, half delta at the most, near a bright star
★★ STF2241, psi 1 Dra, 31 Dra AB 4m6 5m6 30.1'' 17° 2018 Dra 17h41m56.36s +72°08'55.80"
Christopher Hay
Seeheim (Germany)
15x45 Stabilised binoculars, handheld. Easily split. A appears pearl white, B brick red. A very fine pair for 15x. Resolved in stabilised 10x42 but not so pleasantly. Psi1 Dra is a physical double with a period of roughly 10,000 years.
René Merting
Drachhausen (Germany)
16x70 ein auffälliges Pärchen in einem wilden Sterngewimmel vieler heller Sterne, beide Komponenten sind knapp getrennt zu erkennen - Komponente B ist mindestens eine Größenklasse schwächer und strahlt nicht so schön reinweiß wie A
Christopher Hay
Seeheim (Germany)
80mm (30x) Widely split. A light yellow, B light blue.
Uwe Pilz
Leipzig (Germany)
105mm (55x) weiß-orange
BRT2437 10m8 11m0 4.1'' 58° 2015 Her 17h42m12.51s +20°31'33.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Faint, seems more near equal, pretty wide ~4". [not physical]
★★★ COU1596 9m3 9m3 0.2'' 104° 2007 Her 17h42m14.40s +44°22'59.10"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Olive to notched at best moments, equal stars
STF2198 7m6 11m2 7.7'' 25° 2015 Her 17h42m38.37s +26°33'06.10"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Orange star with very much fainter bluish B, seen at the edge of direct vision, wide.
BRT2438 10m8 11m3 3.1'' 354° 2015 Her 17h42m42.30s +21°38'33.70"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Faint pair but obvious, wide about 5", half delta mag, bluish stars [not physical]
COU29 11m5 11m5 2.7'' 191° 2015 Her 17h43m02.81s +20°19'24.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) A bit of a smear but well split, bluish points in haze, around equal magnitude. In a kite asterism, the star opposite also looks like a double, similar magnitude a little wider.
A233 8m0 11m4 2.9'' 237° 2016 Her 17h43m10.63s +24°47'10.90"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Yellow star shimmering in seeing, need critical focus to smallest point, then B star barely resolves in still moments a very small faint blue point, ~3" separation. Like a planet illuminated by its sun. Nice!
COU629 11m3 11m8 4.0'' 207° 2015 Her 17h43m12.10s +22°45'19.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Pretty, wide separated (~4"), 1 delta mag, bluish stars. Nice!
STT334 7m9 9m9 15.1'' 356° 2015 Her 17h43m35.03s +34°46'29.40"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ist Komponente B so schwach, dass ich sie fast übersehen habe - beide Sterne sind knapp getrennt und B ist bestimmt zwei Größenklassen schwächer als A - Komponente A ist reinweiß, B ist zu schwach auf der Brust für einen Farbeindruck - bei 64x zeigt sich B besser und gut abgesetzt, blaugraue Färbung
HU1285 8m9 9m2 0.5'' 211° 2016 Her 17h43m38.76s +22°36'43.20"

../images/binary-star-orbits/HU1285-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) unsicher, sehr schwierig
HJ1303, V624 Her 6m2 11m8 40.1'' 151° 2015 Her 17h44m17.25s +14°24'36.10"
Mark McCarthy
Fremont (California/USA)
317mm (277x) Fairly bright A, wide separation to a faint B.
★★★ STF2202, 61 Oph AB 6m1 6m5 20.7'' 94° 2018 Oph 17h44m34.09s +02°34'45.90"
René Merting
Drachhausen (Germany)
10x50 ein ausgesprochen schönes knapp getrenntes Sternpaar - beide Sterne sind in etwas gleich hell - Komponente B im Osten ist nicht ganz so weiß wie A
Uwe Pilz
Leipzig (Germany)
16x70 beide gelb ../projects/double-stars/uwe-pilz/sketches/200725_61Oph.jpg
René Merting
Drachhausen (Germany)
16x70 ein schön eng stehendes Pärchen, knapp getrennt - Komponente A im Westen ist nur leicht heller als B - beide Komponenten wirken weiß
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x leicht zu trennen - Komponente B im Osten ist nur minimal schwächer (keine halbe Größenklasse, denke ich) - Komponente A stahlt ein wenig wärmer als B
Sarah Gebauer
Germany
150mm (30x) bei geringer Vergrößerung (30x) schon sauber getrennt, beide Sterne wirken gleich groß und gleich hell, ein nettes Pärchen
Sarah Gebauer
Germany
150mm (54x) zwei nicht ganz enge Glanzpünktchen in einer eher uninteressanten Umgebung
Mark McCarthy
Fremont (California/USA)
203mm (667x) Half delta mag wide separation white.
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/61%20Ophiuchi.png
STF2213 8m2 9m0 4.7'' 328° 2018 Her 17h44m50.81s +31°07'54.50"
René Merting
Drachhausen (Germany)
100mm (64x) bei 64x zeigt sich Komponente B ganz zart knapp abgesetzt nordwestlich von Komponente A - Helligkeitsunterschied eine dreiviertel Magnitude - B wirkt farblich etwas warmweißer als A - zurück auf 32x kann man B schon erkennen, der DS ist leicht länglich, aber noch ohne Einschnürung
STF2205 9m4 9m6 0.9'' 11° 2016 Her 17h45m41.03s +17°43'00.70"

../images/binary-star-orbits/STF2205-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (667x) Half delta mag light orange star about 1" separated (in this scope it is quite wide)
STT335 8m3 9m2 24.8'' 140° 2017 Her 17h45m54.77s +21°53'17.40"
René Merting
Drachhausen (Germany)
16x70 Komponente A ist schwach aber noch gut zu erkennen, B ploppt nur mit etwas Konzentration in einigem Abstand zu A auf - kein schöner Fernglas-Doppelstern, aber machbar
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x ein einfach zu trennender Doppelstern mit schönem augenscheinlichen Farbkontrast - Komponente B im SO ist gut eine Größenklasse schwächer und wirkt grau, A dagegen wie ein Prinz in weißer Weste
STF2224, V826 Her AB 6m7 10m0 7.9'' 349° 2015 Her 17h45m58.44s +39°19'21.00"
René Merting
Drachhausen (Germany)
100mm (64x) bei 64x ein enges Paar, knapp getrennt - Komponente A strahlt zitronen-gelb, Komponente B im Norden ist mindestens 3 Größenklassen schwächer
Robert Zebahl
Leipzig (Germany)
120mm (100x) Well split, rather close and obviously unequal. Primary component appeared slightly yellowish, secondary still visible with direct vision.
mu Her, 86 Her A-BC 3m5 9m8 35.5'' 249° 2015 Her 17h46m27.51s +27°43'14.30"
Robert Zebahl
Leipzig (Germany)
120mm (86x) A-BC: Easy, pretty wide, unequal pair. A appeared yellowish-orange, BC was barely visible with direct vision.
Mark McCarthy
Fremont (California/USA)
203mm (333x) A-BC: Pretty, bright canary yellow A and much fainter bluish B. Nice! (Missed AC 7 BC which are near equal 0.6")
Mark McCarthy
Fremont (California/USA)
317mm (277x) A-BC: Bright yellow with diffraction spikes and some haze around it (poor transparency). 4 delta mag small star on the edge of the haze, wide separation.
Mark McCarthy
Fremont (California/USA)
317mm (553x) A-BC: Bright white and 3-4 delta mag B, wide.
STF2217 AB 8m8 8m9 7.0'' 285° 2017 Her 17h46m40.19s +14°46'44.60"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Two stars near equal mag white wide (AB), a fainter off to one side of one star (AC)
★★★ HU1288 8m3 9m4 0.4'' 163° 2016 Her 17h47m09.16s +15°02'13.80"

../images/binary-star-orbits/HU1288-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (1067x) Awesome! clean split, very clean star images. Split by half disk, half delta mag. very cool great catch! suspected at 667x, ramped up power to 1067x to split.
HEI254 10m4 11m6 2.3'' 274° 2005 Her 17h47m46.02s +16°19'03.20"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Half delta mag orange stars wide separation.
STT336 AD 6m6 10m6 41.0'' 163° 2010 Her 17h47m52.05s +34°16'40.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Fairly bright A, wide and faint B
STF2222 8m4 9m7 2.3'' 63° 2013 Her 17h47m53.16s +14°48'30.50"
René Merting
Drachhausen (Germany)
100mm (107x) bei 64x ist erkennbar, dass A einen Begleiter nordöstlich hat, eine kleine Einschnürung zeigt sich - beide Komponenten sind relativ schwach - bei 107x ist mit etwas Konzentration Komponente B knapp getrennt von A erkennbar - B ist halb so hell wie A
Mark McCarthy
Fremont (California/USA)
508mm (667x) Yellow-white stars 2 delta mag well separated.
TDT519 11m8 11m9 1.0'' 221° 2015 Her 17h48m54.56s +16°33'10.70"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Extremely fine pair, brightens and elongated with averted vision but it's better to let the seeing settle down the hazy refraction and can see points of stars.
STF2223 7m6 9m7 18.3'' 211° 2015 Oph 17h48m57.84s +04°58'03.20"
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x ist südwestlich von Komponente A ist ein deutlich schwächerer Begleiter erkennbar - schönes Pärchen in Peripherie zum mächtig wirkenden Sternhaufen IC 4665
Mark McCarthy
Fremont (California/USA)
203mm (667x) Wide separation 1.5 delta mag.
STF2232 6m7 8m8 6.1'' 140° 2018 Her 17h50m15.00s +25°17'27.60"
René Merting
Drachhausen (Germany)
100mm (64x) bei 64x erscheint B hauchzart getrennt südöstlich von A - deutlich schwächer, mindestens 1.5 Größenklassen - A zeigt sich reinweiß, B trotz Helligkeitsunterschied auch ordentlich weiß - ein schönes ungleiches Paar ohne visuelle Konkurrenz im Umfeld
Mark McCarthy
Fremont (California/USA)
203mm (333x) Dull white and dull orange, well separated, ~3 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (277x) Pretty blue-white pair, 3 delta mag, fairly wide.
Mark McCarthy
Fremont (California/USA)
317mm (277x) a nice white and blue pair, widely separated and 2 magnitudes difference.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty bright A, 3 delta mag B, wide separation
FOX22 10m7 11m3 1.0'' 339° 2010 Her 17h50m41.55s +15°16'15.40"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Half delta mag. actually appears well split, two tiny dots, resolved from haze with seeing. Very cool.
J2117 9m8 12m3 5.1'' 199° 2015 Her 17h50m50.91s +14°59'06.40"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Bluish A, very faint B appears with averted vision at first then can barely hold direct, faint, wide separation (not physical)
STF2242 AB 8m1 8m3 3.3'' 328° 2018 Her 17h51m10.32s +44°54'28.00"
René Merting
Drachhausen (Germany)
100mm (64x) bei 32x ist ein leicht länglicher Stern sichtbar - bei 64x dann ein ganz knapp getrenntes Pärchen, A im Süden, B im Norden - beide Komponenten sind annähernd gleich hell, ein schönes enges weißes Pärchen
Mark McCarthy
Fremont (California/USA)
317mm (553x) Easy matched yellow pair, ~3"
TDT536 10m4 10m8 1.1'' 61° 2015 Her 17h51m18.78s +17°23'08.70"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Very fine pair, well split, 1 delta mag, yellow white stars. Very tight but a nice wide clean split. Resolves with seeing.
STT338 AB 7m2 7m4 0.9'' 168° 2018 Her 17h51m58.46s +15°19'34.90"

../images/binary-star-orbits/STT338-AB-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt
Mark McCarthy
Fremont (California/USA)
317mm (553x) Just split, a pair of bright near equal orange stars.
Mark McCarthy
Fremont (California/USA)
508mm (667x) Yellow-white very clean split stars seem more equal than what the data says
★★★ S694 6m7 7m3 79.3'' 238° 2018 Oph 17h52m05.20s +01°06'40.30"
Uwe Pilz
Leipzig (Germany)
16x70 gelbweiß und blau; identisch WDS1752+0107 ../projects/double-stars/uwe-pilz/sketches/200725_S694.jpg
L17 AB 10m5 11m2 2.4'' 291° 2015 Her 17h52m30.76s +15°31'31.00"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Faint half delta mag stars, orange for faintness, wide separation
★★ BU130, 90 Her 5m3 8m8 1.6'' 110° 2009 Her 17h53m18.03s +40°00'28.60"
Robert Zebahl
Leipzig (Germany)
120mm (300x) Not split at 200x and 300x. I used a 120/600mm achromat.
Mark McCarthy
Fremont (California/USA)
317mm (553x) 90 Her. Need stillness, it coalesces from the diffraction to a light orange point at 553x (grey at 885x). No doubt about it, star, point light. For the first 10 minutes of observing seeing allowed me to glimpse it 1 of every 10 seconds. But after a while seeing was better and I could hold it pretty consistently in both magnifications. At 553x it's in the first ring, at 885x it's in the second.
Mark McCarthy
Fremont (California/USA)
317mm (885x) 90 Her. Definite snowman or bulge to the disk, very subtle, but no split, using an apodizing mask.
STF2245 BA 7m4 7m5 2.7'' 112° 2018 Her 17h56m24.24s +18°19'38.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very pretty orange and blue. Alberio like, but fainter and closer together and the stars are about equal magnitude.
Mark McCarthy
Fremont (California/USA)
508mm (667x) Pretty orange and blue seem more equal mag than data, wide separation (MCA 49 Aa,Ab 0.1" not seen!)
HU235 6m9 9m0 1.8'' 289° 2018 Her 17h57m05.08s +45°51'21.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very certain point sitting just outside the diffraction ring, brightens and sharpens with seeing. 2" 2-3 delta mag.
AG357 9m4 10m4 2.9'' 190° 2015 Her 17h57m41.89s +17°06'34.10"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Yellow and burnt orange stars, half a delta mag, wide separation (not physical)
J3268 13m3 13m8 4.0'' 216° 2017 Her 17h58m22.68s +18°14'12.10"
Mark McCarthy
Fremont (California/USA)
508mm (667x) faint but obvious, well separated, near equal. (not physical)
STF2259 7m3 8m4 19.6'' 277° 2017 Her 17h59m03.63s +30°02'56.10"
René Merting
Drachhausen (Germany)
10x50 Komponente B ist knapp getrennt westlich von A erkennbar - Helligkeitsunterschied eine halbe Magnitude (1.17 mag laut Stelle Doppie) - der Doppelstern muss sich gegen viele helle Sterne im Umfeld durchsetzen, er wirkt dadurch ein wenig verloren, aber auch filigraner
René Merting
Drachhausen (Germany)
18x70 ein schöner FG-Doppelstern - zwei eng stehende Sterne - Komponente B ist gut eine dreiviertel Größenklasse schwächer
René Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein gut getrenntes Paar mit einem schönen Farbkontrast - Komponente B im Westen ist eine Größenklasse schwächer - A weißgelb, B blaugrau - auch bei 20x zeigt sich das Pärchen gut getrennt
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and slightly blue tnged B, 2 delta mag, wide, 15" or more.
STF2273 AB 7m3 7m6 22.0'' 283° 2017 Dra 17h59m13.71s +64°08'33.10"
AC 7m3 12m7 43.5'' 277° 2015
AD 7m3 14m7 14.8'' 336° 2015
BC 7m6 12m7 22.4'' 271° 2015
Robert Zebahl
Leipzig (Germany)
70mm (22x) AB: 2020-04-21: A nice separation, striking with moderate distance. The components appear similarly bright and are both yellowish orange.