Double Stars - R.A. 18h-24h

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 1402
Visual Observations 2268
Sketches 183
Photographs 56
Observers 15
Werner E. Celnik, Berthold Fuchs, Sarah Gebauer, Christopher Hay, Claus-Dieter Jahn, Karsten Kopp, Winfried Kräling, Stefan Loibl, Mark McCarthy, René Merting, Uwe Pilz, John Raymond, Jörg S. Schlimmer, Frederik Wanink, Robert Zebahl
m1 m2 ρ θ Year Coordinates (J2000.0)
★★ STF2308 40/41 Dra AB 5m.7 6m.0 18.7" 232° 2019 Dra 18h00m09.07s / +80°00'13.70"
AC 5m.7 8m.3 225.3" 129° 2017

../images/binary-star-orbits/STF2308-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
8x44 2020-06-27: The pair AB split, but very tight with components of equal brightness. In acute angle far apart the component C was also visible.
Christopher Hay
Seeheim (Germany)
15x45 AB: Clearly split, brighter component seems bluish. One of the finest doubles for 15x, hence my two-star rating. In 10x42 a difficult split at the limit.
René Merting
Drachhausen (Germany)
16x70 ein schön eng stehendes Pärchen, die Himmelsrichtungen erschließen sich mir hier leider nicht, aber die Komponenten sind beide ähnlich hell und weiß - schöner Anblick im Fernglas
Christopher Hay
Seeheim (Germany)
50mm (8x) AB: An elongated figure-8 very close to splitting
Christopher Hay
Seeheim (Germany)
80mm (30x) AB: Very clearly split, dominates the 2.5° FOV, with interesting sprinkling of fainter stars throughout the field.
Robert Zebahl
Leipzig (Germany)
102mm (28x) Very nice, slightly uneven pair. Components appeared yellowish-white. Beautiful surroundings. On the sketch the components A, B and C are visible. ../projects/double-stars/robert-zebahl/sketches/2019-06-30_40_41_dra.jpg
Uwe Pilz
Leipzig (Germany)
105mm (100x) AB: =40/41 Dra. Auffallend
Christopher Hay
Seeheim (Germany)
140mm (75x) AB: Wide apart, the pair absolutely dominates the field of view, with attractive sprinkling of fainter stars to the west. Very delicate colour contrast that was hard to grasp in 3-inch scope now becomes clear, component B (40 Dra) is bluish, component A (41 Dra) yellowish.
A1374 AB 8m.9 10m.9 0.5" 213° 2019 Her 18h00m17.93s / +21°53'47.50"

../images/binary-star-orbits/A1374-AB-orbit-solution-1.jpg ../images/binary-star-orbits/A1374-AB-orbit-solution-2.jpg

Mark McCarthy
Fremont (California/USA)
508mm (205x) Very tough, the extraordinarily fine point of the B star appears with seeing. around 3 delta mag from light yellow A. Spectral class G0, yellow. Worth waiting for the seeing on this one. Physical with a 139.53-year period, it is slowly widening and will take another 30 years to reach apastron
STF2271 AB 8m.2 9m.2 3.5" 267° 2019 Dra 18h00m18.74s / +52°51'15.40"
AC 8m.2 13m.0 160.8" 17° 2015
René Merting
Drachhausen (Germany)
100mm (107x) AB: bei 64x ist eine kleine 8 erkennbar - bei 107x sind beide Komponenten sicher trennbar - B ist eine dreiviertel Größenklasse schwächer
Mark McCarthy
Fremont (California/USA)
203mm (205x) AB: Dull white A and pale yellow B, ~1.5 delta mag, wide ~4"
A1375 9m.6 10m.6 1.8" 92° 2018 Her 18h00m24.40s / +21°11'36.10"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Fine equal pair, well separated, points with seeing.
COU809 11m.4 11m.6 2.1" 26° 2015 Her 18h00m30.13s / +17°33'52.70"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Excellent fine near equal pair, nicely separated, nice contrast with rich field of brighter stars. WDS uncertain of binarity, but Gaia shows there is no overlap in the parallax ranges. The proper motions are similar so these are comoving but not gravitationally bound
H6 2, 67 Oph AC 4m.0 8m.1 54.7" 143° 2019 Oph 18h00m38.72s / +02°55'53.70"
René Merting
Drachhausen (Germany)
10x35 zwischen beide Sterne passt maximal ein halbes Blatt Papier - C im Südosten kommt mir entgegen aller früheren Erfahrungen nicht so schwach vor wie sonst, ich würde hier nur auf maximal eine Größenklasse schätzen, eigenartig
René Merting
Drachhausen (Germany)
10x50 ein einfacher Doppelstern - Komponente C steht mit gutem Abstand südöstlich von A - Komponente A ist gleißend weiß, C wirkt dagegen richtiggehend grau-braun
Christopher Hay
Seeheim (Germany)
15x45 Stabilised binoculars, handheld. Components wide apart, almost too wide to appear as a double star. Secondary a fine speck of light beside the primary, which is >4mag brighter. According to Stelledoppie a true physical pair at a distance of 1230 light years. It is interesting to contemplate that at this distance in space the companion still looks so separate. “H“ in the catalogue name means that this double star is listed in the catalogue of W. Herschel. The 6 in the name means that it is a double star of the 6th Class [separation 1’ or larger] in Herschel’s system.
René Merting
Drachhausen (Germany)
16x70 auf den ersten Blick bin ich enttäuscht, weil ich nur einen hell strahlenden Stern erkennen kann - dann aber mit etwas Konzentration ist südöstlich von der Leuchtgranate ein ganz schwacher Begleiter zu erkennen - ein sehr ungleiches Paar mit geschätzt 4 Größenklassen Unterschied - Komponente C wirkt rotbraun und steht ordentlich getrennt von A
Uwe Pilz
Leipzig (Germany)
16x70 der helle ist gelb-weiß ../projects/double-stars/uwe-pilz/sketches/200725_67Oph.jpg
Christopher Hay
Seeheim (Germany)
25x80 Very far apart, almost so far as to appear to not belong together. However, in the 3° field of view 70 Ophiuchi, which is also a physical double, is seen to be also split. Thus a very attractive field overall.
67 Oph and 70 Oph are the left and right nostrils of the bull in the old constellation Taurus Poniatowski (Poniatowski’s Bull). 68 Oph (the tip of the bull’s nose) and 73 Oph (the bull’s right eye) are also double stars, but can’t be split at 25x. All four doubles – 67, 68, 70 and 73 Oph – are physical, a rare assemblage!
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x großer Abstand zwischen beiden Sternen - weil Komponente A so gleißend hell strahlt, fehlt der mindestens um 3 Größenklassen schwächeren Komponente C im SO die Farbe, eher gräulich
LDS6413 7m.1 13m.1 88.1" 105° 2015 Her 18h00m38.89s / +29°34'18.90"
Mark McCarthy
Fremont (California/USA)
317mm (277x) A star is a pretty orange star A. B is 13th mag 88" -- not likely seen though there are several very faint stars about.
ES640 9m.5 10m.1 8.4" 77° 2018 Dra 18h00m42.85s / +54°52'38.10"
Mark McCarthy
Fremont (California/USA)
203mm (205x) ~1 delta mag, wide ~4"
STF2263 8m.7 9m.9 7.7" 158° 2018 Her 18h00m55.43s / +26°32'57.20"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Wide ~1 delta mag, white-blue A and dull orange B
STF3129 7m.6 10m.6 30.8" 168° 2015 Her 18h01m07.16s / +45°21'03.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White and wide separation, 2 delta mag fainter orange B.
STF2264, 95 Her 4m.8 5m.2 6.4" 257° 2019 Her 18h01m30.41s / +21°35'44.80"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x mein erster Eindruck ist, dass zwei annähernd gleichhelle sehr eng stehende Sterne mich wie zwei Augen anschauen, das unmittelbare Sternumfeld passt schön und verleiht dem Doppel eine hervorgehobene Stellung - Komponente B im Westen ist nur minimal schwächer als A - in guten Momenten ist die Trennung sehr eindeutig erkennbar
René Merting
Drachhausen (Germany)
100mm (64x) bei 64x zwei helle, knapp getrennte Sterne - die schwächere westliche Komponente zeigt ein schönes, helles Gelb und wirkt dadurch leicht schwächer - zurück auf 32x ist eine 8 mit deutlicher Einschnürung erkennbar - der Farbunterschied ist ebenfalls deutlich
Uwe Pilz
Leipzig (Germany)
105mm (288x) ../projects/double-stars/uwe-pilz/sketches/95Her.jpg
Karsten Kopp
Köln (Germany)
140mm (94x) Konnte erst mit 94-facher Vergrößerung gut getrennt wahrgenommen werden.
Sarah Gebauer
Germany
150mm (54x) zwei enge, hübsche Glanzpünktchen, die ich zuvor ziemlich lange in dem hellen Sterntrapez gesucht habe
Robert Zebahl
Leipzig (Germany)
152mm (49x) 2020-06-23: At 49x eye catching double star, relatively tight with rather small difference in brightness. Beautiful color impression, which was even better visible at 69x: yellowish and yellowish-orange.
Mark McCarthy
Fremont (California/USA)
508mm (667x) 95 Her. Orange and blue, wide, bright.
Karsten Kopp
Köln (Germany)
600mm (135x) Sehr einfaches und auffälliges Objekt. Kein Helligkeitsunterschied erkennbar.
Berthold Fuchs
Wiesbaden (Germany)
130mm close DS ../projects/double-stars/berthold-fuchs/photographs/95%20Herculis.png
Frederik Wanink
Itterbeck (Germany)
254mm ../projects/double-stars/frederik-wanink/photographs/95%20Her.jpg
STF2267 8m.4 8m.8 0.4" 281° 2018 Her 18h01m41.17s / +40°10'41.90"

../images/binary-star-orbits/STF2267-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) nicht als DS gesehen
COU811 11m.2 11m.7 2.2" 153° 2015 Her 18h01m58.10s / +30°47'16.70"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Faint but more cleanly split than at 20" due to seeing. 8" limited to 11th mag in poor transparency.
BU1127 AB 7m.3 9m.2 0.7" 39° 2018 Her 18h02m30.89s / +44°14'02.60"
Mark McCarthy
Fremont (California/USA)
152mm (175x) Notched elongation at all powers
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very tough but a small point of a star resolved at the rim of the diffraction ring at both 553x & 885x, using kind of a partial averted vision.
STF2278 AB 7m.8 8m.1 36.3" 29° 2019 Dra 18h02m52.88s / +56°25'40.30"
AC 7m.8 8m.5 33.6" 39° 2017
AD 7m.8 10m.2 198.2" 189° 2015
BC 8m.1 8m.5 6.0" 147° 2018
René Merting
Drachhausen (Germany)
18x70 A und BC sind getrennt zu erkennen, sehr dicht zusammen stehend, unauffällig - B und C kann ich nicht trennen
Mark McCarthy
Fremont (California/USA)
203mm (205x) AB: Pretty white-blue stars, in a 2+1 set. Not physical
STF2262, tau Oph AB 5m.3 5m.9 1.5" 290° 2019 Oph 18h03m04.91s / -08°10'48.90"

../images/binary-star-orbits/STF2262-AB-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (240x) getrennt ../projects/double-stars/frederik-wanink/sketches/STF2262.jpg
STF2277 AB 6m.2 8m.9 26.8" 129° 2018 Her 18h03m08.87s / +48°27'51.30"
AC 6m.2 10m.2 99.7" 297° 2015
BC 8m.9 10m.2 126.4" 300° 2015
René Merting
Drachhausen (Germany)
100mm (20x) AB: bei 32x ein weit getrenntes Pärchen mit schönem Farbkontrast - Komponente A weiß-gelb, B grau-orange - auch bei 20x ist noch ordentlich Luft zwischen beiden Sternen
STTA164 8m.3 9m.3 50.8" 2015 Oph 18h03m12.41s / +07°54'34.60"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x sehr weit getrennt - schöner Farbkontrast, Komponente A strahlt weiß und B kupferrot und nicht viel schwächer als A, Helligkeitsunterschied nach meinem Empfinden eine halbe Größenklasse
ES470 9m.4 10m.7 8.3" 208° 2018 Her 18h03m15.08s / +27°50'40.30"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Can hold B direct after foveal coaxing, it's very faint ~1 delta and wide
SLE88 12m.2 13m.3 3.8" 339° 2015 Her 18h03m51.56s / +25°58'17.30"
Mark McCarthy
Fremont (California/USA)
508mm (333x) A star steady direct vision, B flashes into view with averted and slowly fades to invisibility. Close, about 4" and one and one half delta mag. [not physical, disappointingly]
HO426 7m.0 12m.0 11.7" 229° 2015 Her 18h03m54.11s / +26°39'05.00"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Pretty yellow star, about 7th magnitude, with a much fainter 5 delta mag, very widely separated companion [not physical]
GCB30 12m.0 12m.5 0.9" 155° 1982 Her 18h04m01.86s / +16°12'15.00"
Mark McCarthy
Fremont (California/USA)
508mm (205x) A little more than 1 delta mag, well separated white stars. No parallax range overlap
S698 AB 7m.2 8m.5 29.7" 316° 2015 Sgr 18h04m12.64s / -22°30'03.20"
René Merting
Drachhausen (Germany)
100mm (20x) bei 32x die beiden hellsten Vertreter im Sternhaufen M 21, weit getrennt - Komponente B west-nordwestlich ist eine knapp Größenklasse schwächer und grau - der Doppelstern fällt nicht besonders auf in der Sternhaufenumgebung, aber es ist ok
TDT664 11m.2 11m.8 0.6" 232° 1991 Her 18h04m29.33s / +22°54'44.20"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Marginal, I only get an elongation. Very tight
STF2279 9m.9 10m.3 13.3" 180° 2015 Dra 18h04m33.72s / +50°52'48.00"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Near equal, wide, white. Physical
ES471 AC 7m.2 10m.2 24.3" 44° 2015 Her 18h04m39.08s / +27°06'54.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Much fainter B star, 3 delta mag, wide separation. Direct vision, but faint.
STT534 8m.5 10m.5 2.3" 269° 2015 Her 18h04m59.56s / +21°26'31.90"
Mark McCarthy
Fremont (California/USA)
508mm (667x) One star definitely brighter by at least one mag than the other. Well separated
A2093 9m.1 9m.8 0.6" 231° 2018 Her 18h05m25.74s / +16°23'42.30"
Mark McCarthy
Fremont (California/USA)
508mm (533x) White stars, nicely split, >1 delta mag. No parallax range overlap
70 Oph, P Oph, STF2272 AB 4m.2 6m.2 6.6" 122° 2019 Oph 18h05m27.37s / +02°29'59.30"

../images/binary-star-orbits/STF2272-AB-orbit.jpg

Uwe Pilz
Leipzig (Germany)
16x70 nicht einfach; der helle ist gelb ../projects/double-stars/uwe-pilz/sketches/200725_70Oph.jpg
Christopher Hay
Seeheim (Germany)
25x80 Clean split, component A appears yellowish.
70 Oph is the left nostril of the bull in the old constellation Taurus Poniatowski (Poniatowski’s Bull). On the connections to 67, 68 and 73 Oph see the entry on 67 Oph.
René Merting
Drachhausen (Germany)
100mm (64x) bei 32x wirkt der Stern nicht rund, sondern ein wenig nach SO verschmiert - bei 64x dann eindeutig ein knapp getrenntes schön anzusehendes Pärchen - Komponente A hell-gelb, B orange-gelb
Jörg S. Schlimmer
Germany
127mm (136x) easy to split ../projects/double-stars/joerg-schlimmer/sketches/Zeichnung%2070%20Oph_filtered_96dpi.jpg
Sarah Gebauer
Germany
150mm (85x) ein ganz leicht goldener Farbeindruck des Sternpaares, die Sterne stehen recht dicht beisammen und sind dennoch schön getrennt ../projects/double-stars/sarah-gebauer/sketches/20200805%2070%20Oph%20DSk.jpg
Robert Zebahl
Leipzig (Germany)
200mm (80x) Conditions in the target region: SQM-L 20.1
Well split at 80x. Brighter component appeared white, fainter one slightly orange.
Berthold Fuchs
Wiesbaden (Germany)
130mm difficult DS ../projects/double-stars/berthold-fuchs/photographs/70%20Ophiuchi.png
STF2276 AB 7m.1 7m.4 7.1" 257° 2017 Oph 18h05m43.30s / +12°00'13.90"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Beautiful near equal well separated, yellowish, in nice field of stars.
STT341 AB 7m.4 8m.8 0.1" 86° 2019 Her 18h05m49.72s / +21°26'45.60"
AB-C 7m.2 10m.6 28.2" 171° 2015
AB-D 7m.2 10m.5 39.5" 99° 2009
AB-E 7m.2 10m.2 66.5" 38° 2018
AB-F 7m.2 11m.5 111.6" 357° 2009
AB-G 7m.2 7m.6 132.5" 239° 2018

../images/binary-star-orbits/STT341-AB-orbit.jpg

René Merting
Drachhausen (Germany)
100mm (32x) AB-C: bei 32x ist Komponente C weit getrennt südlich von AB als Hauch von einem Stern erkennbar
AB-D: bei 32x ist Komponente D im Osten von AB ist ähnlich schwach erkennbar wie C im Süden - D ist etwas weiter weg als C
AB-E: bei 32x ist Komponente E im NO von AB ähnlich schwach erkennbar wie C im Süden und D im Osten - Entfernung zu A doppelt so weit wie AB-C
AB-F: bei 64x ist F im Norden von AB in vierfacher Entfernung AB-C erkennbar - im Grunde spiralen die vier schwachen Komponenten von Süden kommend von Osten nach Norden aus
STF2282 AB 7m.9 9m.4 2.7" 83° 2017 Her 18h06m30.47s / +40°21'39.60"
AC 7m.9 9m.4 2.7" 80° 2008
BC 9m.4 9m.4 0.2" 48° 2008
René Merting
Drachhausen (Germany)
100mm (107x) AB: bei 64x ploppen zwei kleine Perlchen auf, die dicht beieinander stehen - Komponente B im Osten ist nur unwesentlich schwächer (eigenartig, laut Stelle Doppie sollen beide Sterne 1.5 Größenklassen Helligkeitsunterschied haben) - bei 107x ist die Trennung dann eindeutig, aber immer noch sehr knapp
Mark McCarthy
Fremont (California/USA)
152mm (175x) AB: White stars, 1 delta mag, good separation
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Faint yellow white, 3", half delta mag.
COU417 11m.3 11m.4 1.5" 91° 2008 Her 18h06m47.23s / +23°25'52.20"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Very finely split pair at this magnification and small scale, slight mag difference, small faint pair vs other brighter stars in the field. WDS uncertain, but Gaia data show 25% parallax range overlap and only 543 AU separation, so it's likely this is gravitationally bound
AC15, 99 Her AB 5m.1 9m.0 1.4" 331° 2018 Her 18h07m01.61s / +30°33'42.70"

../images/binary-star-orbits/AC15-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (667x) 99 Her.Very nice. B star resolves just outside first diffraction ring when that ring has faded with good seeing, a very fine faint point. large delta mag. There are many other pairings in this system, including 0.2" for the A star]
STT524 7m.9 8m.9 0.5" 207° 2018 Her 18h07m29.52s / +19°39'59.10"

../images/binary-star-orbits/STT524-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (533x) Suspected hairline with 333x, nice clean split at 533x, white stars, significant magnitude difference, ~0.5". 686 year period
★★ STF2280, 100 Her AB 5m.8 5m.8 14.3" 183° 2019 Her 18h07m49.56s / +26°06'04.40"
René Merting
Drachhausen (Germany)
10x35 ein 8, eine Einschnürung ist ab und an erkennbar - Trennung nicht möglich
René Merting
Drachhausen (Germany)
10x50 zwei extrem dicht stehende helle Sterne - noch nicht getrennt, aber schön als 8 erkennbar
Robert Zebahl
Leipzig (Germany)
16x70 2020-07-05: Very nice, rather isolated double star. Striking. Similar bright component, both white.
René Merting
Drachhausen (Germany)
18x70 perfekt für 18-fache Vergrößerung - zwei gleich helle, dicht zusammen stehende Sterne - reinweiß und sehr auffällig, weil keine ähnlich hellen Sterne im Umfeld zu sehen sind
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein schönes, enges Pärchen zweier gleichheller Sterne - beide gleich hell und reinweiß - zurück auf 20x zeigen sich beide Protagonisten weiterhin ganz knapp getrennt - Komponente B im Süden wirkt leicht gelblich und schwächer
Uwe Pilz
Leipzig (Germany)
105mm (26x) Weiß-orangeweiß
Robert Zebahl
Leipzig (Germany)
120mm (40x) Conditions in the target region: SQM-L 20.5
Very nice, evident double star with equally bright components.
Karsten Kopp
Köln (Germany)
140mm (94x) Doppelstern ist einfach zu trennen. Das besondere ist hier, dass die beiden Sterne recht alleine zu stehen scheinen. Beide erscheinen weiß.
Sarah Gebauer
Germany
150mm (54x) zwei hübsche Glanzpünktchen, die mich an ein Knöpflein mit zwei Löchern erinnern, der "typische" DS für mich: nicht zu eng, nicht zu weit, gleich hell, sehr nett ../projects/double-stars/sarah-gebauer/sketches/20200805%20100%20Her%20DSk.jpg
Robert Zebahl
Leipzig (Germany)
152mm (22x) Beautiful view. Easy to separate with components of the same brightness. It is noticeable that there are no brighter stars in the immediate vicinity, so that the double star stands out very well.
Mark McCarthy
Fremont (California/USA)
203mm (205x) 100 Her. Bright equal wide yellow-white stars. [not physical]
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/100%20Herculis.png
COU504 11m.2 11m.7 2.1" 76° 2015 Her 18h08m51.57s / +24°32'48.80"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Very near equal pair, well split, a fine close pair in a bright star field. Good parallax range overlap, only 713 AU separation, so very likely gravitationally bound
COU812 10m.8 10m.8 0.7" 265° 2016 Her 18h09m09.93s / +31°29'10.50"

../images/binary-star-orbits/COU812-orbit-solution-1.jpg ../images/binary-star-orbits/COU812-orbit-solution-2.jpg

Mark McCarthy
Fremont (California/USA)
203mm (667x) Elongation, marginal notch, but a bit too hazy to make a good observation
HU926 9m.9 9m.9 3.9" 265° 2016 Dra 18h09m31.81s / +64°14'02.90"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Nice equal mag, wide ~4", white. Not physical
STF2281, 73 Oph AB 6m.0 7m.5 0.8" 283° 2019 Oph 18h09m33.86s / +03°59'35.80"

../images/binary-star-orbits/STF2281-AB-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) als 8 zu sehen, schwierig ../projects/double-stars/frederik-wanink/sketches/73Oph.jpg
★★ HU674 7m.7 8m.6 0.7" 214° 2018 Her 18h09m40.64s / +50°24'07.40"

../images/binary-star-orbits/HU674-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt, ähnlich hell ../projects/double-stars/frederik-wanink/sketches/HU674.jpg
Mark McCarthy
Fremont (California/USA)
508mm (333x) Split with seeing at 333x, near equal white.
STF2289 6m.7 7m.2 1.2" 218° 2019 Her 18h10m08.69s / +16°28'35.00"

../images/binary-star-orbits/STF2289-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (333x) Just split in 20" at 205x, but flaring. 333x had messy diffraction. 8" mask at 333x gave clean disks, split, ~0.7". Dull yellow and yellow-red colors.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) Hauptstern gelb, Begleiter scheint bläulich ../projects/double-stars/frederik-wanink/sketches/STF2289.jpg
HU316 10m.0 11m.0 1.8" 157° 2015 Her 18h10m19.94s / +18°16'33.40"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Nice 1 delta, well split, white and dull white stars. WDS is uncertain but the Gaia data show good parallax range overlap, a very close 336 AU separation, BUT the escape velocity exceeds the radial velocity delta, so it is not (or will not be for long) gravitationally bound
HO81 8m.2 11m.1 3.3" 215° 2019 Her 18h10m26.23s / +32°21'10.10"
Mark McCarthy
Fremont (California/USA)
203mm (667x) With the 8" mask, the B star appears with averted vision as a bluish smear at the right PA and ~3" separation. In the 20" the A star is more diffracted and a brighter yellow, and B is a direct obvious blue small glow resolving to point with seeing.
S700 & ABH94 S700 AB 8m.3 9m.7 18.8" 291° 2018 Ser 18h10m33.56s / -16°44'57.40"
S700 AC 8m.3 8m.6 28.6" 353° 2018
ABH94 AD 8m.3 14m.2 47.7" 348° 2015
ABH94 AE 8m.3 13m.5 58.0" 65° 2015
ABH94 AF 8m.3 13m.1 99.2" 49° 2015
S700 AG 8m.3 11m.3 35.6" 297° 2015
René Merting
Drachhausen (Germany)
18x70 AC: Komponente C ist nördlich von A eng stehend, aber gut getrennt zu sehen - beide Komponenten sind fast gleich hell - irgend etwas im Westen von A stört die Harmonie (Komponente B?), aber ich kann es nicht mit Gewissheit sagen
René Merting
Drachhausen (Germany)
100mm (32x) AB: wenn man bei 32x genau hinschaut, ploppt westlich von A in halbem Abstand AC ein schwacher Lichtpunkt aus, das ist Komponente B … ohne Farbe, weil sehr schwach - auch 64x verbessert die Sichtbarkeit von B nicht wirklich
AC: bei 32x fallen die fast gleich hellen Komponenten A und C (nördlich von A) des Dreifachsystems auf
René Merting
Drachhausen (Germany)
320mm (45x) AB: Komponente B ist sehr schwach und nur halb so weit entfernt wie der Abstand AC
AC: A und C nehmen sich helligkeitstechnisch nicht viel - zusammen mit B entsteht ein flaches Dreieck
ES185 9m.9 11m.0 12.3" 284° 2015 Her 18h11m04.08s / +32°58'22.40"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Obvious pair, wide, bluish stars, half delta mag [not physical]
HU317 9m.6 9m.7 1.5" 205° 2015 Her 18h11m20.44s / +17°13'17.80"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Light orange stars, well separated, near equal.
A238 8m.6 9m.6 0.6" 68° 2016 Her 18h11m20.99s / +25°19'18.60"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Extraordinary pair. With critical focus it pops into view with clear airy disks, nicely split light yellow orange A and blue B. Seeing is steady for around 7 seconds before fuzzing out for longer stretches. WDS uncertain, and Gaia lacks data for the secondary.
STF2292 8m.3 8m.6 0.8" 276° 2016 Her 18h12m06.74s / +27°38'35.90"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Very fine split, white stars, slight mag difference ~0.5 delta. Very fine at this magnification
COU1006 9m.2 11m.3 0.5" 236° 2011 Her 18h12m58.00s / +33°17'53.90"

../images/binary-star-orbits/COU1006-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (667x) B is very much fainter and can only be seen when A is perfectly still and round, with seeing. Fairly well separated about 0.5", can tell PA with drift. Physical with 119.2-year period, it is coming off periastron and slowly widening
BU131 & FOX221 BU131 AB 7m.5 9m.3 3.2" 277° 2005 Ser 18h13m35.49s / -15°35'54.10"
BU131 AC 7m.5 11m.8 9.2" 300° 2015
FOX221 AD 7m.5 12m.5 40.8" 34° 2015
BU131 BC 9m.3 11m.8 6.2" 310° 2005
René Merting
Drachhausen (Germany)
320mm (144x) BU131 (AB): bei 144x ist Komponente B knapp getrennt westlich von A zu erkennen und bestimmt 1,5 bis 2 Größenklassen schwächer - B wirkt grau gegen den weißen A
★★ mu Sgr, Polis H5 7 AB 3m.9 10m.5 16.9" 258° 2013 Sgr 18h13m45.81s / -21°03'31.80"
BU292 AC 3m.9 12m.8 25.5" 119° 2008
HJ2822 AD 3m.9 10m.0 48.2" 312° 2013
HJ2822 AE 3m.9 9m.2 50.2" 114° 2013
SLV7 BD 10m.5 10m.0 40.9" 331° 1998
SLV7 BE 10m.5 9m.2 64.6" 106° 2015
René Merting
Drachhausen (Germany)
100mm (32x) AD: bei 32x Komponente A gleißend hell im Zentrum und Komponente D gut abgesetzt sehr schwach im NW
AE: bei 32x auf der entgegengesetzten Seite im SW zeigt sich Komponente E in gleichem Abstand und mit gleicher Lichtschwäche - die beiden schwachen Komponenten D und E haben A voll in der Flügelzange - das Ganze funktioniert auch bei 20x, aber das sind die beiden schwachen Komponenten nahe der Sichtbarkeitsgrenze
René Merting
Drachhausen (Germany)
320mm (45x) AD: bei 45x ist D wunderbar als schwacher Begleiter in ordentlichem Abstand nordwestlich von A erkennbar
AE: E zeigt sich auf der entgegengesetzten Seite in gleichem Abstand - mit AD zusammen ein schickes Trio
BU1274 BC 9m.8 10m.6 1.0" 144° 2017 Dra 18h14m31.41s / +56°34'26.90"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Super challenging. A-BC is bright white A and BC is blue widely separated. Near to BC is BD, which is near equal to BC and ~6". BC is faint and split with seeing, hairline, significant mag difference
GII110 CD 9m.4 11m.9 0.8" 302° 2016 Her 18h14m37.03s / +23°35'01.60"
Mark McCarthy
Fremont (California/USA)
508mm (533x) With seeing, very significant delta mag ~2 delta mag, white stars, very tight but split. Suspected @ 333x. [Discoverer is amateur Rene Gili, who observes with the large refractors at the Nice Observatory, this pair was discovered in 2016 via CCD-- the discovery measure is the only one in WDS so far]
POU3366 11m.0 11m.0 13.7" 238° 2015 Her 18h14m49.24s / +23°13'54.60"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Easy near equal wide pair
HU927 10m.2 10m.2 0.4" 101° 2016 Her 18h15m04.79s / +32°49'26.80"
Mark McCarthy
Fremont (California/USA)
508mm (667x) White stars, slight mag difference, hairline with 533x, nice good split with 667x. WDS uncertain, and Gaia lacks data for the primary
STT346 8m.3 9m.0 5.2" 329° 2019 Her 18h15m25.05s / +19°46'13.40"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Nice pale yellow-white stars, >1 delta mag, >4" separation
ES1651, TZ Lyr 11m.2 12m.4 2.5" 2015 Lyr 18h15m49.67s / +41°06'37.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Challenging! Faint elongated star with direct vision. With averted vision it flashes a split, half delta mag, just split.
STF2305 AB 9m.2 10m.8 5.1" 334° 2018 Dra 18h16m13.17s / +51°19'46.20"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Blue-white A and >1 delta mag ruddy B, wide
STTA167 8m.0 9m.1 53.0" 74° 2016 Oph 18h16m13.87s / +04°34'02.90"
René Merting
Drachhausen (Germany)
10x50 ordentlich getrennt und mangels Konkurrenz im Umfeld leicht auffindbar - Komponente A ist schwach, B ist nochmal eine Größenklasse schwächer, aber noch problemlos erkennbar
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x leicht zu trennen - Komponente B im NW ich gut eine Magnitude schwächer, deutlich dumpfer und gräulicher, Komponente A dagegen strahlt weiß
STF2304 8m.8 9m.8 5.2" 70° 2019 Lyr 18h17m06.98s / +40°15'21.20"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Faint pair, so the colors might be a little exaggerated. Ice blue A and reddish B, wide. Spectral is K0, yellow-orange. WDS says it's physical, and it looks that way: only 5% parallax overlap, but a 1,790 AU separation, and the A star stellar mass is 2.6 and B is 1.9. The difference in radial velocity is less than the escape velocity, so it may well be gravitationally bound
A241 10m.6 10m.7 0.7" 288° 2016 Her 18h17m10.10s / +26°40'33.30"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Very fine pair, significant delta mag, well split but close with 533x. WDS uncertain, however there is no overlap in parallax ranges
SHJ264 AB-C 6m.9 7m.6 17.2" 51° 2019 Sgr 18h18m43.26s / -18°37'10.80"
René Merting
Drachhausen (Germany)
76mm (29x) bei 29x ein schön getrennter Doppelstern mit leichtem Farbkontrast - B im Nordosten ist eine halbe bis dreiviertel Größenklasse schwächer
René Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein ordentlich getrenntes Pärchen, auffällig im Umfeld - Komponente AB im SW ist weiß-blau, Komponente C ist 0.75 mag schwächer und weiß-gelblich - 20x reichen ebenso, dann eng getrennt
René Merting
Drachhausen (Germany)
320mm (45x) bei 45x ein schön anzusehendes Sternpaar - gut getrennt und doch eng zusammen stehend - B im NO ist gut eine halbe Magnitude schwächer
AG221 AB 9m.9 9m.9 1.8" 12° 2015 Her 18h20m02.24s / +21°20'00.70"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Fine near equal, split ~2"
STF2309 9m.3 9m.9 3.4" 352° 2018 Her 18h20m06.84s / +25°31'53.00"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Wide ~4", white stars, ~1 delta mag. Not physical
STF2310 6m.8 10m.0 5.1" 235° 2017 Her 18h20m38.67s / +22°47'50.70"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Bright white A and faint dull wide B, ~3 delta mag, wide ~6"
STT353, phi Dra AB 4m.5 5m.9 0.5" 266° 2011 Dra 18h20m45.44s / +71°20'15.80"

../images/binary-star-orbits/STT353-AB-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) nicht als DS gesehen
Frederik Wanink
Itterbeck (Germany)
254mm ../projects/double-stars/frederik-wanink/photographs/STT%20353%20AB.jpg
BU640 7m.0 12m.0 0.7" 322° 2008 Her 18h20m49.23s / +27°31'48.30"

../images/binary-star-orbits/BU640-orbit.jpg

Mark McCarthy
Fremont (California/USA)
178mm (533x) Very much fainter B seen with averted vision and foveal coaxing only, can only hold it briefly. Physical with a 951.7127-year period (to be exact), it is now making a very fast turn around apastron -- though I think the orbital solution is predicting an incorrect position (too close to apastron at this moment) -- unfortunately I did not record the PA so I can't tell if it's on the west or east side of apastron. Will need to re-observe this, since I don't think I'd see 0.2" at 533x (likely around >0.5" given the delta mag)
ES2110 9m.3 10m.8 6.4" 96° 2018 Lyr 18h20m58.41s / +36°30'18.90"
Mark McCarthy
Fremont (California/USA)
178mm (205x) B is seen with averted vision only, white. WDS uncertain; there is no parallax overlap so it is not
STF2312 9m.3 9m.9 1.7" 341° 2015 Her 18h21m09.08s / +28°20'03.50"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Very fine white stars, >1 delta mag, ~1.5"
COU505 11m.0 11m.3 1.1" 318° 2015 Her 18h21m16.17s / +24°09'06.10"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Very faint pair, ~1 delta mag, split firmly with seeing, ~1" separation
HO430 9m.6 10m.7 2.5" 194° 2018 Her 18h21m37.31s / +20°30'11.50"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Blue-white A and dull white B, ~2 delta, wide ~2". Nice looking pair [not physical]
★★★ BU641 7m.0 8m.7 0.8" 341° 2015 Her 18h21m48.44s / +21°30'27.90"
Frederik Wanink
Itterbeck (Germany)
254mm (640x) sehr schwierig ../projects/double-stars/frederik-wanink/sketches/BU641.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Extraordinary! Moderately bright A and very much fainter B, 4-5 delta mag, <1" separation. Seeing needs to still.
Mark McCarthy
Fremont (California/USA)
508mm (533x) V989 Her. Seen as a snowman dot to bright white A @ 333x, split with 533x, inside first diffraction ring. Need A's disk to be perfectly tight for B to resolve with seeing. Very nice. 1" at discovery 1878 with Dearborn 18.5-inch
HU581 8m.8 9m.4 0.4" 122° 2016 Her 18h22m54.84s / +14°58'11.00"

../images/binary-star-orbits/HU581-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (1067x) Snowman at 533x & 667x, clean split at 1067x & apodising mask, one delta mag. Amazing. Coalesces into two points, can easily tell orientation & magnitude difference for sketch. At apastron, it is on a nearly edge on orientation, will close rapidly within the next ten years to be too close for me to detect.
HO83 10m.1 10m.4 0.8" 115° 2016 Her 18h23m20.34s / +27°31'24.10"

../images/binary-star-orbits/HO83-orbit.jpg

Mark McCarthy
Fremont (California/USA)
178mm (445x) Pretty difficult, B appears with averted vision only and fades with direct. Much fainter, about 1". Physical with a 1699.9512-year period, it will soon make a turn toward periastron and tighten over the next few decades. Discovered in 1883 at 0.3"
STF2314 9m.0 10m.3 2.7" 331° 2018 Her 18h23m25.75s / +23°27'19.10"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Fine pair, wide ~2.5", ~1 delta mag
ES187 AB 9m.3 9m.4 2.5" 207° 2018 Dra 18h23m45.03s / +51°38'55.80"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Near equal, ~2", slightly ruddy stars. Nice pair
STF2323, 39 Dra AC 5m.1 8m.0 88.9" 20° 2017 Dra 18h23m54.65s / +58°48'02.10"
AB 5m.1 8m.1 3.8" 348° 2018

../images/binary-star-orbits/STF2323-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
55mm (27x) AC: Pretty wide, unequal pair. Die brighter A component appeared white.
Robert Zebahl
Leipzig (Germany)
55mm (71x) AB: Very nice. The B component seemed to be comparable faint as the C component. ../projects/double-stars/robert-zebahl/sketches/2019-05-18_39_dra.jpg
Mark McCarthy
Fremont (California/USA)
203mm (205x) AB: 39 Dra. Brilliant white A and slightly ruddy B, ~3 delta mag, ~4" sep. 3962.5 year period.
A244 10m.5 10m.5 0.6" 268° 2016 Her 18h24m09.99s / +28°18'21.40"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Extremely fine, half delta mag white stars, good clean spilt. WDS says they are near equal but Gaia has 9.92/10.77. No Gaia data on the secondary
STF2315 AB 6m.6 7m.8 0.6" 117° 2018 Her 18h24m58.46s / +27°23'41.30"

../images/binary-star-orbits/STF2315-AB-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) als 8 zu sehen ../projects/double-stars/frederik-wanink/sketches/STF2315.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) ! Hairline split @ 553x near equal mag. Suspected elongation at 277x.:
Mark McCarthy
Fremont (California/USA)
508mm (533x) Barely split with seeing, resolves to two disks, more than hairline but almost 2 delta mag, very tough, need perfect seeing. 2094 year period
AG361 10m.7 11m.0 3.8" 13° 2015 Her 18h25m07.89s / +26°54'09.60"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Near equal white stars, wide ~4", in a busy field [not physical]
BU134 8m.0 9m.7 1.0" 126° 2015 Lyr 18h25m17.50s / +46°53'07.40"
Mark McCarthy
Fremont (California/USA)
178mm (205x) I get hints of a faint brightening in A's diffraction, but no resolution. Seeing won't bear higher powers. WDS uncertain, and there is no parallax overlap, so surprisingly this is not physical. Burnham "discovered" in 1851 with his 6-inch at 1.1", but notes: "it had been seen before at Poulkowa, and is STT 543."
STT351 & HU66 HU66 AB 7m.9 8m.4 0.2" 197° 2016 Dra 18h25m18.20s / +48°45'42.50"
STT351 AC 7m.9 8m.2 0.8" 26° 2019
HU66 BC 8m.4 8m.2 0.8" 26° 2019

../images/binary-star-orbits/HU66-AB-orbit.jpg ../images/binary-star-orbits/STT351-AC-orbit.jpg ../images/binary-star-orbits/HU66-BC-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (305x) STT351 (AC): Split, better with seeing, light orange stars, significant mag difference. Did not notice HU 66 AB, 7.9/8.4 0.1" or HU 66 BC, 8.40/8.25 0.9 -- need to go back to this one!
Frederik Wanink
Itterbeck (Germany)
254mm (640x) HU66 (BC): getrennt ../projects/double-stars/frederik-wanink/sketches/HU66.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) HU66 (BC): Very fine near equal pair, yellowish A and blue-white B. ~1" or less.
Mark McCarthy
Fremont (California/USA)
508mm (333x) STT351 (AC): Orange stars, noticeable magnitude difference ~0.5, separated just less than ~1". What's curious is the AB pair is HU 66 AB listed as 7.90/8.40 0.1" currently, with HU 66 BC as 8.40/8.25 0.9". So my question is, if AC is physical, and if BC are physical too, why is AC uncertain? It would seem they should all be sharing orbits? Perhaps it just cries out for additional measures -- AB is grade 4 and BC is grade 5, so they are confident of physicality but there's not enough data to nail it down.
STF2317 BC 12m.5 12m.7 1.4" 315° 2008 Her 18h25m19.45s / +26°04'45.90"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Very challenging. AB is obvious, A a bright light orange, B is blue and faint -- with careful examination I do get a scintillating small balls separated ~1" and near equal -- averted vision brightens these to pinpoints but I can't hold that resolution direct. Stelle Doppie says first measure of this pair is in 1901, so it's not a Struve discovery, likely Aitken or Hussey with the Lick 36-inch
Mark McCarthy
Fremont (California/USA)
508mm (533x) BC much cleaner on this night of better seeing, blue stars very close and faint
HO85 AB 8m.7 12m.0 4.9" 196° 2015 Her 18h25m20.37s / +28°04'59.00"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Blue-white A and slightly red B, wide, ~3 delta. Did not notice HDS 2604 Aa-Ab, 0.7", 11.3 mag (though I probably could not have resolved it anyway).
COU815 9m.0 11m.3 1.6" 144° 2015 Her 18h25m44.22s / +26°39'25.00"
Mark McCarthy
Fremont (California/USA)
508mm (333x) B is a faint light orange star but is clearly separated from white A. Tough little pair
STT352 7m.9 9m.4 24.2" 221° 2019 Lyr 18h26m24.42s / +46°48'32.20"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ist B schön abgesetzt südwestlich von A erkennbar - Helligkeitsunterschied 1.5 mag - bei 64x zeigt sich A reinweiß, B ist grau
Mark McCarthy
Fremont (California/USA)
152mm (175x) Wide one delta mag
HO634 8m.2 12m.2 3.3" 269° 1998 Her 18h26m34.71s / +24°22'12.60"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Nice light yellow-orange star with very faint B, just direct vision & wide, but obviously tied to A [not physical!]
BU1326 AB 6m.5 12m.1 5.5" 107° 2015 Her 18h26m40.93s / +26°26'57.20"
AC 6m.5 9m.6 61.8" 60° 2015
Mark McCarthy
Fremont (California/USA)
152mm (175x) AB: Very extremely fine B is split with seeing and with averted vision only, blue to A's white. Very, very fine!
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: B star is extremely faint 5"
Mark McCarthy
Fremont (California/USA)
317mm (553x) AC: C star is extremely faint and much further out, ~50"
Mark McCarthy
Fremont (California/USA)
508mm (333x) AB: Extremely faint star ~4" distant from the A, 5 delta mag.
SLE177 10m.7 12m.3 9.9" 186° 2015 Her 18h27m07.43s / +23°05'42.10"
Mark McCarthy
Fremont (California/USA)
508mm (667x) 2 delta mag wide pair, slightly blue B.
STF2316, 59 Ser AB 5m.4 7m.6 3.9" 322° 2018 Ser 18h27m12.51s / +00°11'46.10"
René Merting
Drachhausen (Germany)
100mm (64x) bei 64x knappe Trennung - Komponente B zeigt sich wie ein kleines schwaches Anhängsel von A - mehr als 2 Größenklassen Helligkeitsunterschied
Mark McCarthy
Fremont (California/USA)
508mm (205x) Close but easily split, ~2", 2 delta mag, both yellow white.
TDT886 11m.0 11m.3 0.5" 24° 1991 Her 18h27m27.80s / +24°17'10.40"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Extremely fine. At first it seems not split, but in best moments B stretches out and pops out from B, 0.5" and 1 delta mag.
AG223 10m.3 11m.1 2.6" 51° 2018 Her 18h27m34.56s / +24°22'40.00"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Nice white near equal, white, well split ~2.5" [not physical]
STF2319 AB 8m.4 8m.2 5.3" 190° 2019 Her 18h27m43.94s / +19°17'43.90"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Yellow-white near equal wide stars, in a plus one which is ~1 delta fainter wide perpendicular PA (this is the AC pair)
STF2320 7m.1 8m.9 0.9" 2015 Her 18h27m45.89s / +24°41'50.80"
Mark McCarthy
Fremont (California/USA)
203mm (667x) V994 Her. Seen with the 20", but used the 8" mask to clean up the images. Two delta mag, ~1" very nice pair. [eclipsing binary of Algol type--surely not seeing the eclipsing star? In fact, both A & B each are eclipsing binaries, the first such system to be discovered in the whole sky!]
Frederik Wanink
Itterbeck (Germany)
254mm (640x) ../projects/double-stars/frederik-wanink/sketches/STF2320.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice! Blue-white stars, 1", 2 delta mag.
POU3411 AB 10m.6 12m.4 9.9" 34° 2015 Her 18h27m47.84s / +24°14'48.90"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Chain of three stars like an eyebrow, about 1 delta mag between them. AB & AC seen, with A in the middle. I noticed this asterism while observing TDT 886, it was in the same field. [not physical]
POU3410 11m.6 12m.0 8.2" 259° 2015 Her 18h27m49.26s / +23°56'22.20"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Seems more near equal than SkyTools data. Wide. [not physical]
SLE180 13m.1 13m.5 6.4" 247° 2015 Her 18h28m06.90s / +23°59'22.20"
Mark McCarthy
Fremont (California/USA)
508mm (667x) More of an equal pair, 13th mag, than the two delta in SkyTools.
TDT896 10m.6 11m.4 8.8" 152° 2015 Dra 18h28m16.85s / +49°30'16.00"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Faint but easy pair, wide, <1 delta mag. Not physical.
STTA168 AB 7m.7 8m.8 47.2" 162° 2016 Ser 18h28m33.52s / +04°50'55.20"
AC 7m.7 9m.3 244.2" 217° 2016
René Merting
Drachhausen (Germany)
10x50 AB: ordentlich getrenntes Sternpaar - Komponente B im Süden ist schon relativ schwach, aber ohne Mühe erkennbar - das Sternpaar steht schön isoliert, da keine vergleichbar hellen Sterne im unmittelbaren Umfeld sichtbar sind
René Merting
Drachhausen (Germany)
18x70 AB: ein sehr entspannter Doppelstern - kein auffallendes Sternpaar - Komponente B steht komfortabel getrennt im Südosten von A und ist 1 bis 1.5 Magnituden schwächer - leichter Farbkontrast
HU320 10m.4 10m.8 2.0" 144° 2015 Her 18h28m39.80s / +16°13'42.50"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Very faint close pair, can just hold direct. WDS uncertain, however the stars do not share the same parallax range
HN 125 8m.2 8m.5 2.7" 108° 2016 Sgr 18h28m56.75s / -25°02'34.50"
René Merting
Drachhausen (Germany)
100mm (107x) bei 107x ist das Sternpaar nur in guten Momenten knapp getrennt zu sehen - Komponente B im Osten ist nur knapp schwächer
René Merting
Drachhausen (Germany)
320mm (144x) bei 144x kann ich den DS trennen - knapp, aber ok - beide Sterne sind gleichen sich wie ein Ei dem anderen, d.h. gleich hell und die gleiche Farbe
WNO6 6m.7 8m.0 41.8" 182° 2018 Sgr 18h28m57.36s / -26°34'55.50"
René Merting
Drachhausen (Germany)
18x70 ein komfortabel getrenntes Sternpaar - Komponente B im Süden ist eine dreiviertel Größenkasse schwächer - insgesamt ein schönes Sternumfeld mit den beiden ebenso hellen Sternen südwestlich
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x sehe ich ein weit auseinander stehendes Pärchen - Komponente A im Norden weiß, Komponente B ist eine Größenklasse schwächer und grau-blau
René Merting
Drachhausen (Germany)
320mm (45x) bei 45x ein weit getrenntes Paar - B im Süden ist eine knappe Größenklasse schwächer - leichter Farbkontrast durch den Helligkeitsunterschied
STF2328 AB 9m.0 9m.5 3.6" 71° 2019 Lyr 18h29m27.87s / +29°55'27.20"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Well split, almost wide, slight delta mag, white. Near a brighter orange star. WDS says "parallax indicates physical" but in fact there is no overlap in the parallax range, -78%
Mark McCarthy
Fremont (California/USA)
317mm (553x) near equal, ~4", light orange.
TDT908 11m.1 12m.2 1.8" 2015 Her 18h29m29.45s / +23°29'14.40"
Mark McCarthy
Fremont (California/USA)
508mm (205x) ~1 delta mag, fairly wide, white stars, B seen direct but brightens with averted vision.
BU420 AB 9m.8 11m.3 1.8" 274° 2010 Lyr 18h30m01.39s / +37°09'44.10"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Very, very fine pair of faint stars, about 2" separation and 1 delta mag. Burnham discovered in 1872 with his 6-inch at 4.0" and called it "Probably fixed" -- though it has narrowed to 1.8" since! WDS uncertain after 33 measures. They do not share the same parallax range
STF2335 AB 9m.3 10m.7 11.7" 318° 2015 Lyr 18h30m54.06s / +34°16'30.90"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Three stars, the more closely separated (but still wide) B is seen with averted vision. White stars, around 2 delta mag, wide. Not physical
STF2338, KP Lyr AB 9m.3 11m.2 12.1" 301° 2017 Lyr 18h30m54.75s / +38°39'33.80"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Faint wide companion. Not physical
Mark McCarthy
Fremont (California/USA)
317mm (553x) Split in finder. In the scope one splits into a near equal pair.
STF2324 AB 9m.0 9m.4 2.4" 149° 2018 Ser 18h30m58.45s / +01°23'30.80"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Very well split white stars, half delta mag
STF2333 AB 7m.8 8m.6 6.3" 333° 2019 Lyr 18h31m06.94s / +32°14'43.40"
AC 7m.8 12m.9 164.1" 35° 2015
AD 7m.8 13m.7 85.8" 339° 2015
BC 8m.6 12m.9 161.1" 37° 2015
Robert Zebahl
Leipzig (Germany)
70mm (57x) AB: 2020-05-15: Clearly separated with a noticeable difference in brightness. All in all rather faint double star without visible colors.
Robert Zebahl
Leipzig (Germany)
152mm (49x) AB: 2020-06-24: At 22x clearly elongated and almost separated. A difference in brightness can be seen. At 49x clearly separated with slight color difference: whitish and white-bluish.
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: 1 delta mag, wide.
Mark McCarthy
Fremont (California/USA)
508mm (667x) AB: wide separated yellow and orange, 2 delta mag. (several other pairings not seen)
HU932 7m.3 10m.8 2.0" 76° 2010 Dra 18h31m19.01s / +62°32'16.80"
Mark McCarthy
Fremont (California/USA)
203mm (205x) B appears with foveal coaxing, but can hold it direct. ~3 delta mag to bright light yellow A, ~2"
STF2325 5m.8 9m.3 12.4" 257° 2005 Sct 18h31m25.69s / -10°47'45.00"
René Merting
Drachhausen (Germany)
18x70 A ist sehr hell und überstrahlt sein unmittelbares Umfeld ordentlich - ab und an meine ich, B im Südwesten erkennen zu können, aber das ist zu unsicher oder mehr Wunschtraum
René Merting
Drachhausen (Germany)
320mm (72x) bei 45x zeichnet es sich ab, dass westlich außerhalb des Halos der gelblich strahlenden A-Komponente ein schwacher Lichtpunkt erkennbar ist - so richtig sicher war ich mir aber nicht, 72x bringt dann aber die Gewissheit, B steht schön abgesetzt, ist deutlich schwächer und wirkt grauweiß
STF2329 8m.2 9m.4 4.3" 43° 2016 Oph 18h31m26.49s / +06°27'36.90"
René Merting
Drachhausen (Germany)
100mm (64x) bei 32x entsteht schon die Ahnung von einem Begleitstern im NO von A - bei 64x sind beide Komponenten erkennbar, meist kleben sie noch zusammen und nur in guten Momenten ist eine knappe Trennung sichtbar - bei 107x ist die Trennung weiterhin knapp, aber eindeutig (soll heißen, man muss sich nicht mehr auf Momente besonderer Luftruhe verlassen)
ES784 10m.0 10m.5 7.2" 65° 2018 Dra 18h31m51.82s / +51°10'47.80"
Mark McCarthy
Fremont (California/USA)
203mm (205x) ~1 delta mag, fairly wide white stars. Not physical
POU3419 7m.9 12m.1 11.5" 240° 2015 Her 18h32m02.77s / +25°04'01.70"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Easy pair, white stars, wide separation, ~3 delta mag
RST5450 10m.3 10m.3 0.7" 253° 2016 Ser 18h32m32.53s / +00°36'06.90"
Mark McCarthy
Fremont (California/USA)
203mm (667x) At very best moments, which are fleeting, I see very tight but nicely split pair, 1 delta mag, both faint. Resolves from a haze. Nice.
STF2336 9m.2 10m.2 6.8" 2016 Her 18h32m49.25s / +13°49'05.80"
Mark McCarthy
Fremont (California/USA)
178mm (205x) White A and >1 delta mag B, wide. WDS claims physical on the proper motions, but the stars do not share the same parallax range, so they cannot be gravitationally bound
STTA171 AB 7m.0 8m.1 150.1" 328° 2017 Lyr 18h32m51.48s / +38°49'59.80"
René Merting
Drachhausen (Germany)
18x70 ein weit auseinander stehendes Paar - B im Nordwesten ist halb so hell - mehr gibt es nicht zu sagen
STF2357 9m.3 9m.9 4.7" 271° 2018 Dra 18h32m53.86s / +63°42'33.00"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Wide ~1 delta mag white
POU3427 10m.1 10m.4 6.8" 81° 2018 Her 18h32m58.78s / +24°19'49.70"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Easy wide near equal stars
STT356 AB 7m.3 9m.2 28.3" 302° 2019 Lyr 18h33m14.62s / +40°09'34.20"
AC 7m.3 10m.9 48.1" 2015
BC 9m.2 10m.9 45.6" 45° 2015
René Merting
Drachhausen (Germany)
100mm (20x) AB: bei 32x ein weit getrenntes Pärchen - Komponente B im NW ist sehr schwach und mindestens 2, wenn nicht sogar 3 Größenklassen schwächer als A - zurück auf 20x zeigt sich STT356 ordentlich getrennt und Komponente B ist nicht ganz so schwach wie der der gut 5° östlich stehende ähnlich aussehende Doppelstern STF2431
COU204 AB 10m.2 10m.7 11.9" 130° 2018 Her 18h33m31.63s / +21°02'00.80"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Easy wide, ~1 delta mag. Not physical
STF2339 AB-CD 7m.5 8m.7 1.7" 277° 2018 Her 18h33m45.62s / +17°43'55.90"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Very pretty close >1 delta mag pair. AB is HU322 7.74/8.91 0.2", and CD is WAK21 9.3/9.56 0.5", a double-double!
Mark McCarthy
Fremont (California/USA)
203mm (333x) White and dull white B. Close but well separated, ~1" (AB-CD seen. AB is Hu 322 1 delta mag 0.2", good to try again at 20")
HU322 AB 7m.7 8m.9 0.2" 92° 2019 Her 18h33m45.62s / +17°43'55.90"

../images/binary-star-orbits/HU322-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (889x) Very subtle notched elongation, PA on an E-W line but a little cocked from WAK 21. Component of STF 2339 AB-CD
WAK21 CD 9m.3 9m.6 0.5" 263° 2019 Her 18h33m45.62s / +17°43'55.90"
Mark McCarthy
Fremont (California/USA)
508mm (889x) Clean split, near equal bluish color stars, PA E-W. Component of STF 2339 AB-CD. No Gaia data so can't determine if gravitationally bound
SLE209 8m.2 12m.0 10.3" 26° 2015 Lyr 18h33m55.17s / +32°07'50.50"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Light yellow-orange star. With seeing and averted vision, a small point at A'd diffraction ring appears, >2 delta mag and slightly more than 1" separation. Not physical
A1377 & STF2348 & SLE216 A1377 AB 6m.2 6m.4 0.2" 131° 2014 Dra 18h33m56.69s / +52°21'12.60"
STF2348 AB-C 5m.5 8m.7 25.7" 271° 2012
SLE216 AB-D 5m.5 11m.2 93.7" 338° 2005
SLE216 AB-E 5m.5 12m.2 109.1" 232° 2005
René Merting
Drachhausen (Germany)
100mm (20x) STF2348 (AB-C): bei 32x ein auffälliges, klar getrenntes Sternpaar - A strahlt gelblich, B im Westen ist weißgrau und mindestens 2 Größenklassen schwächer - zurück auf 20x ist B ebenfalls knapp erkennbar
Mark McCarthy
Fremont (California/USA)
508mm (205x) STF2348 (AB-C): Very pretty yellow-orange A and yellow-blue B, well separated.
TDT939 10m.8 10m.8 0.6" 1991 Her 18h34m15.05s / +21°01'05.00"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Beautiful clean split, half delta mag, white stars, very close
TDT938 11m.5 11m.8 0.6" 74° 1991 Her 18h34m18.40s / +22°58'27.60"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Very faint, exceptionally fine, split with seeing and B is slightly brighter with averted vision.
STF2337 AB 8m.1 9m.1 16.6" 297° 2018 Sct 18h34m55.15s / -14°42'10.60"
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x gut trennbar, Helligkeitsunterschied zwischen A und B gut eine halbe Magnitude - bei 32x noch einfacher, und Verstärkung des schönen Farbkontrastes, Komponente A im SO ist weiß-bläulich und Komponente B zinnober-rot
René Merting
Drachhausen (Germany)
320mm (45x) bei 45x ist das Paar gut getrennt - B steht im NW von A und - A wirkt weiß und B … farbiger
COU205 9m.4 10m.7 0.3" 152° 1996 Her 18h35m17.64s / +21°44'36.80"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Notched elongation, I have the impression of significant delta mag
★★ STT359 6m.3 6m.6 0.7" 2019 Her 18h35m30.40s / +23°36'19.90"

../images/binary-star-orbits/STT359-orbit.jpg

Robert Zebahl
Leipzig (Germany)
102mm (160x) 2020-11-10: Clearly elongated with slight notching and little difference in brightness. I estimated the position angle to 0°.
Uwe Pilz
Leipzig (Germany)
105mm (198x) leicht eingekerbt, Abstand 0“75 ../projects/double-stars/uwe-pilz/sketches/stt359.jpg
Mark McCarthy
Fremont (California/USA)
152mm (175x) Light orange near equal stars, notched elongation, overlapping disks. Physical with a 219-year period, at apastron now
Mark McCarthy
Fremont (California/USA)
203mm (667x) Kissing 8" 333x, hairline split 667x. Near equal white A and bluish white B.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt ../projects/double-stars/frederik-wanink/sketches/STT359.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Nice! ~0.8" equal yellow-orange stars.
Uwe Pilz
Leipzig (Germany)
320mm (388x) ein sehr ruhiger Abend gestattete die Nutzung von 12 Zoll ../projects/double-stars/uwe-pilz/sketches/200808stt359.jpg
Mark McCarthy
Fremont (California/USA)
508mm (333x) Light yellow near equal split, very close. 219 year period
STF2345 9m.1 10m.5 12.3" 226° 2018 Her 18h35m31.17s / +21°04'27.10"
Mark McCarthy
Fremont (California/USA)
508mm (205x) V998 Her. Wide one delta [The A star is variable is an eclipsing binary but the eclipsing component is apparently only detectable with speckle interferometry. The Struve pair is not physical]
BU643 & STF2342, FR Ser BU643 AB 6m.5 12m.5 13.7" 325° 2015 Ser 18h35m36.48s / +04°56'09.80"
STF2342 AC 6m.5 9m.6 33.6" 2015
René Merting
Drachhausen (Germany)
18x70 STF2342 (AC): das war eine schwere Geburt, Komponente A ist schon sehr hell und C im Norden so schwach, dass sie gerade so zu sehen ist
René Merting
Drachhausen (Germany)
100mm (20x) STF2342 (AC): bei 20x weit getrenntes Pärchen, Komponente C im Nord-NO sehr schwach, mindestens 2 Größenklassen schwächer - Komponente A weißlich, C durch den großen Farbunterschied ohne Strahlkraft und deshalb kupfern
★★ STT358 AB 6m.9 7m.1 1.7" 146° 2019 Her 18h35m53.22s / +16°58'32.50"

../images/binary-star-orbits/STT358-AB-orbit.jpg

Uwe Pilz
Leipzig (Germany)
105mm (110x) fast gleich hell, deutlich trennbar
Mark McCarthy
Fremont (California/USA)
203mm (333x) Pretty, near equal white, perfect disks.
Mark McCarthy
Fremont (California/USA)
508mm (205x) Yellow-white stars, half delta mag, well split. 380 year period
TDT952 11m.4 11m.6 0.7" 178° 1991 Her 18h35m54.54s / +25°41'33.40"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) B appears with seeing within A's first diffraction, very faint, significant delta mag
A249 10m.1 10m.2 1.0" 278° 2016 Her 18h36m03.12s / +24°51'49.30"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Fine pair, equal white, nicely split ~1"
STF2351 7m.6 7m.6 5.0" 161° 2019 Lyr 18h36m12.00s / +41°16'41.20"
Robert Zebahl
Leipzig (Germany)
70mm (67x) 2021-08-15: Beautifully separated with similar bright components. Mild but beautiful color contrast: light yellow/orange & light blue.
René Merting
Drachhausen (Germany)
100mm (64x) bei 32x sind zwei Sterne zu erkennen, die sich noch berühren - bei 64x zeigt sich dann nein knapp getrenntes Pärchen - fast kein Helligkeitsunterschied, ich habe Komponente A für die schwächere der beiden in etwas gleich hellen Sterne gehalten - Komponente B ist warm-weiß
Mark McCarthy
Fremont (California/USA)
178mm (205x) White, <1 delta mag, wide. WDS uncertain; there is a -15% parallax overlap, so not physical
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright yellow-orange equal pair, wide.
A355 9m.4 10m.9 1.3" 143° 2017 Ser 18h36m19.32s / +05°15'37.50"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Tough for tonight's conditions, poor transparency and a nearly full moon. Very faint star with very close companion like two smudges
STF2349 AB 5m.4 9m.4 7.2" 204° 2016 Lyr 18h36m37.34s / +33°28'08.50"
Robert Zebahl
Leipzig (Germany)
102mm (125x) Easy to split with a clear difference in brightness. The companion only appeared as a tiny star. ../projects/double-stars/robert-zebahl/sketches/2019-06-23_stf2349.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) ../projects/double-stars/uwe-pilz/sketches/stf2349.jpg
Uwe Pilz
Leipzig (Germany)
105mm (288x) viel schwieriger, als es die Daten vermuten lassen (7") ../projects/double-stars/uwe-pilz/sketches/191031STF2349.jpg
Mark McCarthy
Fremont (California/USA)
178mm (205x) Bright white A, B is a ghostly grey, faint but seen with direct vision, well separated. WDS is uncertain; there is a 38% parallax overlap, 1,188 AU weighted separation, and the stellar masses are high, 3.58 & 1.22 -- so it may well be gravitationally bound
Mark McCarthy
Fremont (California/USA)
317mm (277x) Bright white and faint ruddy B, fairly close ~4".
★★ alpha Lyr, 3 Lyr, Vega H5 39 AB 0m.1 9m.5 83.7" 184° 2017 Lyr 18h36m56.33s / +38°47'01.20"
STFB9 AC 0m.1 11m.0 76.0" 255° 2012
STFB9 AE 0m.1 9m.5 86.6" 39° 2017
Jörg S. Schlimmer
Germany
127mm (203x) um Vega mehrere Beugungsringe sowie Speckles sichtbar, B leicht zu sehen, E nicht sichtbar ../projects/double-stars/joerg-schlimmer/sketches/Zeichnung_Vega_20190626_ausschnitt_filtered.jpg
Jörg S. Schlimmer
Germany
127mm (203x) verschiedene Vergrößerungen zwischen 40 und 203 fach, Komponente E zeitweise bei indirektem Sehen sichtbar, da Himmel heute klarer ist ../projects/double-stars/joerg-schlimmer/sketches/Zeichnung_Vega_20190627_ausschnitt_filtered.jpg
STT363 7m.5 8m.1 0.6" 336° 2018 Dra 18h37m23.92s / +77°41'12.40"

../images/binary-star-orbits/STT363-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) als 8 zu sehen ../projects/double-stars/frederik-wanink/sketches/STT363.jpg
Frederik Wanink
Itterbeck (Germany)
254mm ../projects/double-stars/frederik-wanink/photographs/STT%20363.jpg
TRA1 8m.5 11m.9 9.4" 164° 2015 Lyr 18h37m53.41s / +35°05'44.80"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Appeared as an ordinary white star. There was no secondary listed in SkyTools so I didn't know what to look for, and didn't notice the 11.90 B star listed in WDS (it was probably too faint for 7-inch anyway). TRA is Veselka Trajkovska who has this one discovery to her name (but numerous measurements made of other stars) using the 25-inch refractor at the Belgrade Observatory. The B star might not be in Gaia, but if I have it correctly it is 13.02 mag and they do not share the same parallax range, so they are not gravitationally bound
STF2347 8m.1 9m.8 3.4" 259° 2001 Ser 18h37m56.63s / -00°23'09.10"
René Merting
Drachhausen (Germany)
100mm (107x) bei 107x ist Komponente B sehr schwer und ganz knapp getrennt südwestlich von A erkennbar, bei 64x hatte ich nur eine Ahnung davon, kein Zuckerschlecken
Mark McCarthy
Fremont (California/USA)
203mm (667x) Orange and light blue, pretty without diffraction, wide separation, 2 delta mag. (not physical)
★★ STF2356 8m.8 9m.2 1.0" 63° 2015 Lyr 18h38m22.51s / +28°41'49.70"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Exquisite! Just split, 1 delta mag so it looks like a split snowman, light orange stars. Very nice. WDS uncertain. Sadly there is no parallax overlap, -33%, so these are not gravitationally bound
STF2362 7m.5 8m.7 4.4" 187° 2015 Lyr 18h38m25.70s / +36°03'11.30"
Robert Zebahl
Leipzig (Germany)
70mm (67x) 2021-08-15: Clearly separated, distinct difference in brightness at still rather small angular distance. As a double star well visible. The primary component appeared white-yellowish.
René Merting
Drachhausen (Germany)
100mm (64x) bei 32x eine kleine Andeutung nach Süden, bei 64x dann der Beweis und knappe Trennung zwischen A und B - ein schönes enges Pärchen - B ist halb so hell
Mark McCarthy
Fremont (California/USA)
152mm (175x) 1 delta mag, blue-white A and ruddy B, well split. WDS is uncertain but this is probably gravitationally bound: 28% parallax overlap, 428 AU weighted separation, 1.72/1.32 solar masses
Mark McCarthy
Fremont (California/USA)
178mm (205x) White A and light yellow B, wide, about 1.5 delta mag. WDS is uncertain; there is 27% parallax overlap, a close 428 AU weighted separation, and sizable mass 1.72 & 1.32 -- it may well be gravitationally bound
Mark McCarthy
Fremont (California/USA)
317mm (277x) White-orange A, lighter orange B, 1-2 delta mag, well split.
★★ STF2358 9m.8 10m.2 2.5" 224° 2015 Lyr 18h38m35.04s / +30°43'20.10"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Faint, near equal, very close but still split. WDS uncertain; there is no parallax overlap
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint near equal <2", another brighter / wider pair nearby. Nice!
STT360 6m.9 9m.1 1.7" 282° 2015 Ser 18h38m39.84s / +04°51'17.30"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Lovely orange stars, two delta mag, used the 8 inch mask to clean up the image, very nice
A1379 9m.7 10m.3 2.1" 211° 2015 Dra 18h38m43.02s / +52°43'27.60"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Faint pair, resolved with seeing, B is flickering between direct and averted vision.
STF2368 AB 7m.6 7m.8 1.9" 321° 2017 Dra 18h38m51.27s / +52°20'38.20"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Brilliant white near equal stars, nicely separated ~2"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Near equal white, close, ~1". Hair split at 205x.
COU207 9m.2 10m.6 1.6" 298° 2010 Her 18h38m54.97s / +22°21'58.70"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Light yellow A and light orange B, nicely split, ~2 delta mag.
STF2360 8m.0 9m.2 2.4" 358° 2011 Her 18h39m19.16s / +20°55'58.90"
Mark McCarthy
Fremont (California/USA)
152mm (175x) ! very fine, faint 1 delta mag light yellow-orange, close split
Mark McCarthy
Fremont (California/USA)
203mm (333x) Fainter white and 1 delta mag bluish B, ~4" nice pair.
Mark McCarthy
Fremont (California/USA)
508mm (205x) White, ~2 delta mag, wide ~3"
MIL5 10m.1 10m.7 3.2" 58° 2015 Her 18h39m25.51s / +15°39'32.90"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Fine faint close pair, 3", <2 delta mag. WDS uncertain, but the two stars do not share the same parallax range
ES787 8m.9 11m.7 8.2" 37° 2015 Dra 18h39m56.26s / +51°05'34.10"
Mark McCarthy
Fremont (California/USA)
203mm (205x) V410 Dra. B noticed with averted vision then held direct as a faint point, ~3 delta mag and wide, white stars. Not physical
STF2364 8m.1 10m.3 10.5" 174° 2015 Her 18h40m05.13s / +24°42'12.40"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Pretty white stars, 2 delta mag wide B. WDS physical, however the stars do not share the same parallax range, -73%, so they are not gravitationally bound
S704 8m.5 9m.1 58.1" 264° 2019 Oph 18h40m21.03s / +09°41'50.60"
René Merting
Drachhausen (Germany)
100mm (20x) bei 32x zwei weit auseinander stehende Sterne - Komponente A im Osten weiß, B im Westen braun-orange kaum schwächer - zurück auf 20x sehe ich beide Komponenten ebenfalls weit getrennt
BU1328 9m.0 9m.9 2.1" 284° 2018 Ser 18h40m57.82s / +03°01'36.40"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Two orange stars, 1 delta mag, well split.
STF2367 AB 7m.7 8m.0 0.4" 74° 2019 Lyr 18h41m16.36s / +30°17'40.90"
AB-C 7m.0 8m.8 14.1" 192° 2019
AB-D 7m.0 12m.0 21.9" 84° 2007
AB-E 7m.0 11m.0 151.7" 341° 2002

../images/binary-star-orbits/STF2367-AB-orbit.jpg

René Merting
Drachhausen (Germany)
100mm (32x) AB-C: bei 32x einfach zu trennen - A-Komponente leicht gelblich, Komponente C südlich ist deutlich schwächer und strahlt zinnober
Mark McCarthy
Fremont (California/USA)
178mm (205x) AB-C: Light yellow-orange A and light blue B, >1 delta mag, very wide. (Need to return to this one, AB is a short 94-year period 0.45", nearing apastron.) WDS calls AB-C physical on the similar proper motions, unfortunately there is no parallax data for A
Frederik Wanink
Itterbeck (Germany)
254mm (640x) AB: nicht als DS gesehen
HU754 8m.4 11m.5 1.3" 93° 1991 Dra 18h41m44.99s / +51°07'33.60"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Very fine B, a tiny point outside brilliant white A's diffraction. ~3 delta at least.
STF2372 AB 6m.5 7m.7 25.0" 82° 2019 Lyr 18h42m08.09s / +34°44'46.70"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x weit getrennt, bei 64x noch weiter getrennt :-D, Komponente B halb so hell wie A und deshalb gräulicher
Uwe Pilz
Leipzig (Germany)
105mm (88x) weiß und blaugrün, erkennbar bei 21x ../projects/double-stars/uwe-pilz/sketches/191031STF2372.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) Yellow-green A and slightly blue-white B. 1 delta mag, very wide.
STF2371 9m.7 10m.0 10.0" 56° 2018 Lyr 18h42m12.44s / +27°38'32.30"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Easy near equal white pair. WDS uncertain, but there is 34% parallax overlap, 6,674 AU weighted separation, which is kind of far, but stellar masses are 2.80 & 2.63, so maybe enough. No radial velocity data
Mark McCarthy
Fremont (California/USA)
317mm (553x) Half delta mag, wide light orange and blue-white pair.
STF2398 AB 9m.1 10m.0 11.3" 182° 2019 Dra 18h42m46.69s / +59°37'49.40"

../images/binary-star-orbits/STF2398-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (205x) Very light orange stars, ~1 delta mag, wide. 408 year period
STF2380 7m.3 8m.7 25.5" 2015 Lyr 18h42m55.42s / +44°55'30.90"
René Merting
Drachhausen (Germany)
100mm (20x) bei 32x einfach zu trennen - Komponente A strahlt gelblich, Komponente B im Norden wirkt eher grau und ist gut 1.5 Größenklassen schwächer - zurück auf 20x wird das Paar etwas attraktiver, weil beide Sterne nun enger zusammen stehen, A ist noch dominanter
BU645 7m.3 12m.1 9.3" 305° 2015 Her 18h43m14.48s / +19°27'59.20"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Pretty cream yellow-white A and slightly orange B, wide ~10", very large delta mag, >4 delta.
STI2383 11m.1 11m.2 14.5" 342° 2015 Dra 18h43m19.16s / +56°36'55.80"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Faint near equal stars, wide, seems to be in a small cluster. Physical pair.
STF2378 AB 8m.9 9m.9 11.5" 190° 2018 Lyr 18h43m21.93s / +35°32'55.30"
René Merting
Drachhausen (Germany)
10x50 beide Sterne sind nebeneinander stehend erkennbar, aber noch nicht getrennt, schwache Einschnürung nur in guten Momenten
Mark McCarthy
Fremont (California/USA)
178mm (205x) 1 delta, white, wide. WDS says its physical due to parallax, and indeed I find 62% overlap in the parallax ranges and a 3,228 AU weighted separation, stellar masses 2.13 & 1.67 -- so may be gravitational. No radial velocity data
STF2374 AB 9m.6 10m.4 13.4" 40° 2016 Lyr 18h43m27.56s / +27°42'54.60"
Mark McCarthy
Fremont (California/USA)
178mm (205x) 1 delta mag, white, wide. Not physical
STF2376 AB 8m.7 9m.3 22.3" 63° 2015 Lyr 18h43m42.26s / +30°24'16.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Triple? 1 delta mag between each, forms a triangle, wide separations.
STT361 8m.2 9m.4 22.6" 172° 2015 Ser 18h43m42.36s / +05°38'59.80"
René Merting
Drachhausen (Germany)
18x70 das Pärchen lässt sich schön trennen - B im Süden ist eine Größenklasse schwächer als die auch schon schwach wirkende A-Komponente
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x zeigen sich zwei schwache Sterne weit getrennt, Komponente B im Süden - bei 32x interessanter Farbkontrast, Komponente A dunkelgelb, B ockerbraun
STI2384 11m.8 11m.8 3.8" 142° 2015 Dra 18h43m58.14s / +55°58'31.30"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Very faint, barely there, averted vision hardly helps, but there are two hazy points, wide ~4". Not physical
STF2403 6m.2 8m.3 1.1" 278° 2011 Dra 18h44m18.25s / +61°02'53.30"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Very tough. B is a brightening or condensation on A's diffraction ring, when A settles down with seeing.
HU325 10m.2 10m.8 0.3" 2008 Her 18h44m18.57s / +20°52'17.80"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Hairline split, ~1 delta mag, very fine pair
★★★ epsilon Lyr STFA37 AB-CD 4m.7 4m.6 209.5" 172° 2016 Lyr 18h44m20.34s / +39°40'12.40"
STFA37 AI 5m.2 10m.1 149.5" 137° 2015
STF2382, 4 Lyr, epsilon 1 Lyr AB 5m.2 6m.1 2.2" 345° 2019
STF2383, 5 Lyr, epsilon 2 Lyr CD 5m.2 5m.4 2.4" 74° 2019

../images/binary-star-orbits/STF2382-AB-orbit-solution-1.jpg ../images/binary-star-orbits/STF2382-AB-orbit-solution-2.jpg ../images/binary-star-orbits/STF2383-CD-orbit.jpg

Christopher Hay
Seeheim (Germany)
naked eye STFA37 (AB-CD): While waiting for Comet Neowise at 3 in the morning in July 2020 surprised myself with my first naked-eye separation of Alpha1 und Alpha2 Capricornis (observing site at 50° northern latitude, Alpha1/2 passing through meridian). Encouraged by this, I lay down and had a close look at Epsilon Lyrae, without really expecting to be able to split it naked-eye, having never succeeded previously. At first Epsilon Lyrae appeared as a very short dash of light. Then the dash resolved into two pinpoints. After 15 years in the hobby and at age 60, at last got Eps Lyr split! No precise prior PA knowledge. After memorising PA as seen naked-eye carefully, confirmed it with binoculars. Eps Lyr is the third-easiest physical double in the (northern hemisphere) summer sky for the naked eye, after Zeta UMa (much easier) und Alpha Lib (marginally easier).
Christopher Hay
Seeheim (Germany)
2x54 STFA37 (AB-CD): Clean split. Actually more pleasant than in 4x10 binoculars, presumably due to more steady handheld view.
Robert Zebahl
Leipzig (Germany)
55mm (59x) STF2382 (AB): At 42x slightly elongated, at 59x elongated and obviously notched.
Robert Zebahl
Leipzig (Germany)
55mm (59x) STF2383 (CD): At 42x clearly elongated, but without any visible notch. At 59x split with touching diffraction disks.
Robert Zebahl
Leipzig (Germany)
70mm (57x) STF2382 (AB): Obviously seen as figure '8'.
Robert Zebahl
Leipzig (Germany)
70mm (57x) STF2383 (CD): Split, but extremely tight with almost touching diffraction disks.
René Merting
Drachhausen (Germany)
76mm (95x) AB-CD: bei 29x schön getrennt erkennbar, ohne dass sich AB und CD schon trennen lassen
AB: bei 57x leicht länglich mit kleiner Einschnürung - bei 95x schön eng getrennt, B nördlich wirkt etwas schwächer- bei 127x wunderschön, das Sternpaar hat zwei Beugungsscheibchen, die wie ein Heiligenschein um die beiden Sterne stehen
CD: bei 57x eine 8 - bei 95x ein schön eng getrenntes Pärchen gleichheller Sterne - bei 127x wunderschön, das Sternpaar hat zwei Beugungsscheibchen, die wie ein Heiligenschein um die beiden Sterne stehen
EF und I: bei 127x sind alle drei Sterne (I 10.1 mag / E 12.3 mag / F 12.7 mag) erkennbar
René Merting
Drachhausen (Germany)
100mm (107x) AB: bei 64x ist das Sternpaar mit leichter Einschnürung und Nord-Süd-Ausdehnung erkennbar - beide Sterne stehen minimal enger zusammen als das südlichere Paar CD - bei 107x knappe Trennung, Komponente B nördlich ist mindestens eine halbe Größenklasse schwächer als A
CD: bei 64x als 8 mit Ost-West-Ausdehnung erkennbar - bei 107x knapp getrennt, beide Komponenten sind etwa gleich hell
Sarah Gebauer
Germany
100mm (136x) ein Test mit dem neuen Refraktor, um einen Vergleich zum 6''-Newton zu ziehen: bei 136x schon astrein getrennt, natürlich ziemlich eng und ganz fein getrennt, aber dennoch ein überraschend positives Ergebnis
Robert Zebahl
Leipzig (Germany)
102mm (125x) Stunning view of the components A-D and I! ../projects/double-stars/robert-zebahl/sketches/2019-06-26_epsilon_lyr.jpg
Uwe Pilz
Leipzig (Germany)
105mm (26x) bei 22x nicht trennbar ../projects/double-stars/uwe-pilz/sketches/epsLyr2.jpg
Jörg S. Schlimmer
Germany
127mm (203x) easy to split ../projects/double-stars/joerg-schlimmer/sketches/Zeichnung_Epsilon-Lyrae_ausschnitt_filtered.jpg
Sarah Gebauer
Germany
150mm (250x) August 2019 zum ersten Mal die nah beieinanderstehenden Komponenten sauber getrennt, ein grandioser Doppel-Doppel-Anblick
Winfried Kräling
Marburg (Germany)
152mm (175x) ../projects/double-stars/winfried-kraeling/sketches/2021-07-23-2025UT-Epsilon%20Lyrae.jpg
René Merting
Drachhausen (Germany)
320mm (144x) bei 144x sind die Komponenten von AB und CD gerade so getrennt voneinander erkennbar, sie tanzen wie wild miteinander - mit Arperturmaske und Abblendung auf 120 mm zeigen die vier nun deutlich schwächeren Sterne schöne Beugungsscheibchen und sind besser getrennt voneinander sichtbar
Uwe Pilz
Leipzig (Germany)
320mm (200x) 7 Komponenten!! A-B-C-D-E-F-I ../projects/double-stars/uwe-pilz/sketches/epsLyr.jpg
Berthold Fuchs
Wiesbaden (Germany)
130mm Double-Double ../projects/double-stars/berthold-fuchs/photographs/epsilon%20Lyrae.png
★★ STFA38, zeta Lyr, zeta 1/2 Lyr AD 4m.3 5m.6 43.7" 150° 2018 Lyr 18h44m46.36s / +37°36'18.40"
Christopher Hay
Seeheim (Germany)
7x45 Handheld. Clearly split, almost wide. Primary bluish-white. Fantastic 8.6° FOV together with Eps1/2 and Delta1/2 Lyrae. One of the best doubles for 7x.
Christopher Hay
Seeheim (Germany)
10x42 Clearly separated. Colour contrast between bluish A and orangish D is there if one knows it, but not as striking as in 15x45 binoculars.
Christopher Hay
Seeheim (Germany)
15x45 Component A clear blue-white, component D very pale tangerine orange. Wide split. Colour contrast seems even greater than that of nearby Delta 1/2 Lyrae. Physical double.
René Merting
Drachhausen (Germany)
76mm (29x) bei 29x ein schön getrenntes Pärchen - D im Südosten ist 1.5 Magnituden schwächer und wirkt blaugrau gegen die weißgelbe A-Komponente
Mark McCarthy
Fremont (California/USA)
80mm (13x) Zeta 2 Lyr. Slightly greenish-white stars. Best view in finder, cleaner. Wide, 1 delta mag.
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x weit getrennt, Komponente A weißlich, D leicht gelblich
Uwe Pilz
Leipzig (Germany)
105mm (88x) weiß-orange ../projects/double-stars/uwe-pilz/sketches/zetaLyr.jpg
Sarah Gebauer
Germany
150mm (85x) weit getrennt, unspektakulär
Winfried Kräling
Marburg (Germany)
152mm (175x) ../projects/double-stars/winfried-kraeling/sketches/2021-07-23-2045UT-Zeta%20Lyrae.jpg
Mark McCarthy
Fremont (California/USA)
152mm (175x) Wide, white-yellow stars, one delta
Frederik Wanink
Itterbeck (Germany)
254mm ../projects/double-stars/frederik-wanink/photographs/Zeta%20Lyrae.jpg
WEB7 9m.6 10m.3 11.3" 50° 2015 Lyr 18h44m47.67s / +44°57'37.80"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Near equal, white, wide, fairly faint. WDS says physical from proper motions. There is 34% parallax range overlap, a far 8,343 AU weighted separation, but higher stellar masses 2.94 and 2.57, so it might be gravitational. Time will tell
ES1424 8m.4 13m.0 7.9" 90° 2015 Lyr 18h44m57.58s / +44°21'32.50"
Mark McCarthy
Fremont (California/USA)
508mm (205x) A is a light orange & bright, B seen easily as a dull pin point, wide ~5", large delta mag.
COU1792 11m.0 12m.0 1.1" 347° 2007 Lyr 18h45m01.28s / +40°51'28.80"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Very faint but just split with seeing when haze reduces to points, one slightly brighter than the other
STF2395 AB 7m.9 10m.5 8.5" 308° 2015 Lyr 18h45m03.66s / +46°08'07.50"
Mark McCarthy
Fremont (California/USA)
178mm (205x) White A and light blue B. B is pretty faint, just barely seen direct. WDS says physical, but there is -23% parallax overlap, so that's incorrect
ES2020 10m.3 12m.0 3.5" 342° 2015 Lyr 18h45m09.42s / +37°56'11.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) B star flashes into view with averted vision, three delta mag, >3", can hold direct intermittently with seeing and transparency
STF2392 AC 9m.2 10m.5 23.8" 173° 2015 Lyr 18h45m09.99s / +39°13'32.80"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Obvious slightly blue stars, well split, 2 delta mag. Part of a two plus one with the other much further split and a little fainter than B (AC. There is a BC pair, 11th mag, 26")
STF2393 AB 7m.8 10m.4 18.2" 24° 2015 Lyr 18h45m10.84s / +38°18'54.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty light orange and light blue! Wide separation, 1.5 delta mag.
COU1608 11m.5 13m.6 1.0" 224° 2009 Lyr 18h45m17.02s / +38°55'51.40"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Using averted vision, can stretch the haze around B and barely resolve a point ~1" separated. Extremely faint, at limit
ROE50 AB 10m.8 11m.7 4.7" 282° 2015 Lyr 18h45m19.87s / +40°04'58.40"
Mark McCarthy
Fremont (California/USA)
508mm (205x) A is a light blue and B is much fainter orange color, wide ~5"
STF2375 AB 6m.3 6m.7 2.6" 120° 2019 Ser 18h45m28.36s / +05°30'00.40"
René Merting
Drachhausen (Germany)
100mm (64x) bei 64x sehe ich zwei sehr dicht stehende Sterne, mit etwas Geduld wird ab und an eine knappe Trennung deutlich - beide sind in gleich hell (ich habe sogar A und B falsch zugeordnet, weil ich B knapp heller fand) und strahlen um die Wette in weiß
Stefan Loibl
Rosenheim (Germany)
102mm (102x) 'Tweedledum' and 'Tweedledee', recognizable as double star at 68x, clearly split at 102x, components equally bright, quadruple, visual double
STF2394 9m.6 10m.0 6.9" 203° 2018 Lyr 18h45m28.48s / +42°02'07.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty wide near equal white.
STF2381 8m.3 10m.4 8.9" 122° 2018 Lyr 18h45m30.77s / +28°15'24.30"
Mark McCarthy
Fremont (California/USA)
178mm (205x) White A and light blue B, wide. WDS says physical, but again no parallax overlap -3%
POU3532 12m.3 12m.4 9.8" 211° 2015 Her 18h45m31.49s / +23°16'26.80"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Not visible with 8" so removed mask. Wide separation pair, in middle of two other stars forming a line [not physical]
POU3533 12m.7 12m.8 12.5" 328° 2015 Her 18h45m36.33s / +23°57'28.10"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Wide separated, half delta mag faint pair. Picked out fairly easily in crowded field. [not physical]
BU51 BC 11m.9 12m.9 6.0" 297° 2015 Lyr 18h45m39.17s / +39°40'45.90"
Mark McCarthy
Fremont (California/USA)
508mm (205x) A is light orange & bright, BC is and obvious blue pair ~1 delta mag between B and C, wide ~3-4". Nice! Burnham: "Unimportant triple a short distance from Epsilon Lyrae, noted with 6-inch."
SLE120 11m.6 11m.7 6.9" 115° 2015 Lyr 18h45m49.38s / +31°13'17.80"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Fairly wide, about half delta mag, 7". Plain stars [not physical]
MLB1079 BC 11m.2 12m.5 7.4" 279° 2015 Dra 18h45m49.76s / +59°22'27.20"
Mark McCarthy
Fremont (California/USA)
508mm (205x) A-BC is relatively bright white A, wide separation. The B of BC is easily but C is more difficult, fainter, but yet a steady point with seeing
STF2390 7m.4 8m.6 4.3" 155° 2016 Lyr 18h45m49.83s / +34°31'06.60"
René Merting
Drachhausen (Germany)
100mm (64x) bei 64x ploppt Komponente B knapp getrennt auf, vorher war sie unsichtbar - Farben Fehlanzeige
Uwe Pilz
Leipzig (Germany)
105mm (88x) ../projects/double-stars/uwe-pilz/sketches/191031STF2390.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) Orange and very wide separation B, 2x fainter B, bluish.
STF2373 7m.4 8m.4 4.3" 336° 2018 Sct 18h45m51.33s / -10°29'34.10"
René Merting
Drachhausen (Germany)
100mm (64x) bei 64x ist Komponente B nördlich oberhalb von A knapp getrennt erkennbar - Helligkeitsunterschied mehr als eine Größenklasse, aber kein Farbkontrast
SLE366 10m.6 12m.4 10.0" 337° 2015 Lyr 18h46m04.64s / +27°34'17.30"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Faint orange and blue, pretty pair, wide about 9", almost one delta mag
MLR7 9m.9 11m.0 1.1" 303° 2010 Dra 18h46m07.33s / +61°21'10.60"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Extremely fine, ~1 delta, ~1" separation, resolved only with seeing when stars harden to points.
HU937 8m.8 9m.9 1.0" 333° 2015 Dra 18h46m13.38s / +64°11'44.40"

../images/binary-star-orbits/HU937-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (333x) Hairline split at 205x, more definite split with 333x, ~1 delta mag. A is yellow-white, B is a deeper yellow-orange. 225.53 year period
TDT1045 11m.7 11m.8 0.9" 301° 1991 Aql 18h46m18.10s / +08°20'43.00"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Very marginal. very faint star feels not round
POU3541 11m.7 12m.5 12.1" 289° 2015 Her 18h46m18.80s / +24°15'38.60"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Another faint pair, easily picked out in the field, one delta mag, wide. [not physical]
TDT1047 11m.5 11m.7 0.7" 242° 1991 Lyr 18h46m24.73s / +28°15'24.50"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Seeing not supporting steady view, but suspected elongation and notch at 553x, and at 1067x the image is soft but certainly a pair of stars in haze flashing brighter with averted vision
STF2379, 5 Aql AB 5m.9 7m.0 12.5" 121° 2019 Aql 18h46m28.58s / -00°57'41.90"
AC 5m.9 11m.3 21.8" 156° 2017
BC 7m.0 11m.3 13.4" 172° 2017
René Merting
Drachhausen (Germany)
100mm (20x) AB: bei 20x und etwas Geduld erkenne ich am Stern in Richtung SO knapp getrennt einen schwächeren Begleiter - bei 32x sind beide Sterne ordentlich getrennt, Komponente B gut eine Magnitude schwächer
Mark McCarthy
Fremont (California/USA)
203mm (667x) AB: Wide triple.
Mark McCarthy
Fremont (California/USA)
508mm (205x) AC: I had strong visual color response, though the disks were somewhat bloated with seeing: A was blue-white, B was yellow-white, and C red-orange. Colors were the same at 100x but the disks smaller. With an 8-inch mask at 205x, the disks were tight and overall everything was fainter. C was less red, more grey, and much fainter, so the color was not so strong and maybe would not be described as orange
TDT1049 11m.2 11m.5 1.3" 2015 Lyr 18h46m29.75s / +44°16'01.80"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Faint pair split with seeing at 205x, more definite with 333x. Slight mag difference.
STF2385 AB 8m.4 10m.8 5.5" 30° 2017 Her 18h46m33.09s / +16°58'59.50"
Mark McCarthy
Fremont (California/USA)
178mm (205x) White A and can see B first with averted vision and then can hold with direct, 3 delta mag, wide. Not physical per WDS, but this is incorrect! 4% parallax range overlap but only 55 parsecs; 300 AU weighted separation, and 1.08/0.64 stellar mass; and the radial velocity delta (1.07) is less than the escape velocity (3.18), so it is gravitationally bound!
HU1191 8m.7 9m.4 0.2" 258° 2008 Lyr 18h46m34.62s / +38°21'04.00"

../images/binary-star-orbits/HU1191-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (1067x) V595 Lyr. Very tough! In unsettled seeing it is an elongation or lopsided at all powers. However at best moments it tightens enough to show a very subtle notch & also different brightness and color, A being light orange-yellow, and ~1 delta mag B a deeper orange. Discovered in 1902 at 0.2, it has only a 14.64 year period, it will make a rapid circuit to the other side by 2026 (though only 0.1"), and "widen" to 0.2" again by 2030. Should be fun to observe!
COU1153 10m.4 10m.7 0.4" 118° 2011 Lyr 18h46m34.77s / +34°14'58.00"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Snowman at best moments, slight mag difference. Seems more difficult than a typical 0.4"
HU935 9m.9 10m.6 3.0" 153° 2015 Lyr 18h46m38.12s / +32°10'02.90"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Easy pair, ~3", one detla mag, yellow white stars. well split [not physical]
BRT261 10m.3 11m.2 4.7" 18° 2015 Lyr 18h46m48.48s / +30°53'55.40"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Quite easy pair, almost one delta mag, wide about 4-5"
STF2410 8m.6 8m.8 1.7" 86° 2018 Dra 18h46m56.67s / +59°19'52.00"
Mark McCarthy
Fremont (California/USA)
508mm (205x) White, ~1 delta mag, well split ~2"
STF2397 7m.5 9m.1 3.9" 269° 2017 Lyr 18h47m13.09s / +31°24'20.20"
René Merting
Drachhausen (Germany)
100mm (107x) bei 64x klebt B noch an der A-Komponente - bei 107x können A und B in guten Momenten knapp getrennt erkannt werden - B ist deutlich schwächer
Mark McCarthy
Fremont (California/USA)
508mm (533x) Light orange and blue, pretty pair, two delta mag, wide ~5"
COU1154 11m.1 11m.0 0.6" 55° 2010 Lyr 18h47m38.65s / +32°47'28.90"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Suspect notch at 553x, 1067x too hazy, but great clean split at 667x, very small, near equal. What a great sight.
POU3551 11m.0 12m.2 7.0" 157° 2015 Her 18h47m39.21s / +24°11'33.90"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Wide ivory and blue stars, two delta mag [not physical]
ALI142, EZ Lyr 11m.4 11m.6 12.7" 127° 2016 Lyr 18h47m40.34s / +35°59'34.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint pair, near equal to half a delta mag, light orange and a wide separation ~10".
A255 9m.2 12m.9 4.9" 69° 2017 Her 18h48m21.20s / +25°44'15.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Nice pair, yellow and slightly red, wide, B is pretty faint but easily seen
ES2023 8m.7 12m.0 6.4" 246° 2017 Lyr 18h48m24.10s / +36°11'41.80"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Bright white A, B is seen with averted vision and then can hold direct, ~7"
TDT1063 11m.5 11m.5 0.6" 299° 1991 Lyr 18h48m38.18s / +31°32'09.60"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Suspected at 553x, with 667x can observe elongation, and with averted vision it flashes definite elongation and at times split. Need to avert vision for the B star to be seen and to split but can hold if seeing steadies.
STF2391 AB 6m.5 9m.6 37.7" 332° 2016 Sct 18h48m39.49s / -06°00'15.50"
René Merting
Drachhausen (Germany)
10x50 Komponente B ist extrem schwach nordwestlich von A zu erkennen, knapp getrennt - ich vermute, das schafft man mit der Öffnung nur stativgestützt … und mit einem richtig guten Fernglas
René Merting
Drachhausen (Germany)
18x70 Komponente B ist gut abgesetzt nordwestlich von A zu erkennen - großer Helligkeitsunterschied
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x ist Komponente B im NW von A unheimlich schwach erkennbar, mindestens 2 Größenklassen Helligkeitsunterschied - gewohnter Farbkontrast aufgrund der unterschiedlichen Helligkeiten
Berthold Fuchs
Wiesbaden (Germany)
130mm v.easy DS ../projects/double-stars/berthold-fuchs/photographs/STF%202391.jpg
HU936 9m.7 9m.8 1.8" 101° 2017 Lyr 18h48m42.19s / +34°01'04.80"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Excellent pair, clean and precise split with seeing, near equal blue-white stars, nicely split. Struve should have got this. WDS uncertain, I find no parallax range overlap
STF2400 AB 8m.1 11m.1 9.7" 159° 2014 Her 18h48m54.88s / +16°15'24.40"
Mark McCarthy
Fremont (California/USA)
178mm (205x) White and 2 delta mag wide B, in a rich field. Not physical
STF2401 AB 7m.3 9m.3 4.1" 38° 2017 Her 18h48m57.83s / +21°10'01.30"
Mark McCarthy
Fremont (California/USA)
152mm (175x) White, 2 delta mag, well separated
Mark McCarthy
Fremont (California/USA)
317mm (553x) Not difficult, reddish A and blue B, ~5", 1 delta mag.
J1208 11m.5 12m.1 4.7" 334° 2015 Lyr 18h49m14.79s / +28°34'47.10"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Easy white near equal, wide, about 5". May be another double in filed, which has a brighter A star but much fainter B, around 6" separation
POP44 10m.6 12m.3 9.7" 230° 2015 Lyr 18h49m33.16s / +35°11'46.20"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Faint pair, wide, noticeable delta. WDS says physical, but there is -54% parallax overlap, so it is not
STF2402 8m.9 9m.3 1.5" 208° 2015 Aql 18h49m44.14s / +10°40'35.40"

../images/binary-star-orbits/STF2402-orbit.jpg

Mark McCarthy
Fremont (California/USA)
203mm (667x) Lovely near equal, tight but well split. Forms a perfect triangle with two other stars
HO440, nu 2 Lyr 5m.2 12m.7 18.4" 175° 2015 Lyr 18h49m52.92s / +32°33'03.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright white and very faint, very wide B.
★★ STF2406 7m.1 11m.2 4.6" 2018 Lyr 18h49m55.77s / +26°25'30.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright white, 3-4 delta mag, B is averted vision only and delicate, with seeing. Wow!
Mark McCarthy
Fremont (California/USA)
508mm (667x) White star no split at 8" 333x and 667x, but needed the 20" to see the well separated B star.
HU328, AD Her 9m.8 11m.2 4.8" 187° 2018 Her 18h50m00.30s / +20°43'16.50"
Mark McCarthy
Fremont (California/USA)
178mm (205x) AD Her. 1 delta faint B noticed with averted vision, but can then hold direct. Well separated. WDS uncertain, however there is 27% parallax range overlap, 2,583 AU separation, and 2.54/2.01 stellar mass, so they are likely gravitationally bound
HJ1352 7m.6 11m.3 13.5" 251° 2015 Lyr 18h50m03.28s / +29°48'55.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 2 delta mag, wide.
A256 9m.0 11m.2 2.9" 59° 2009 Lyr 18h50m03.54s / +31°48'48.20"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Orange pair, about 2 delta mag, wide 4-5". Nice pair.
★★ beta Lyr, 10 Lyr, Sheliak STFA39 AB 3m.6 6m.7 45.7" 149° 2017 Lyr 18h50m04.79s / +33°21'45.60"
BU293 AE 3m.6 10m.1 67.2" 317° 2015
BU293 AF 3m.6 10m.6 86.0" 18° 2015
Christopher Hay
Seeheim (Germany)
10x42 AB: Stabilised binoculars, handheld. B is well apart from A and distinct. Very pretty!
Robert Zebahl
Leipzig (Germany)
70mm (22x) At 22x and 57x the components A, B, E and F were easily seen. The B component appeared slightly bluish-silver at 22x, but at 57x the color was difficult to tell. All four components form a slightly curved 'Y' with the bright A component in the center.
René Merting
Drachhausen (Germany)
76mm (18x) AB: bei 18x sind die beiden Sterne gut getrennt voneinander zu erkennen
EF: beide Komponenten zeigen sich bei 18x sehr schwach
René Merting
Drachhausen (Germany)
100mm (32x) AB: bei 32x sind die Komponenten A und B weit getrennt, B ist deutlich schwächer
EF: ebenfalls bei 32x machen zwei gleichhelle Fühlersterne (E und F) nördlich von Komponente A das System interessanter - sie sind noch schwächer als B - Farbe konnte ich bei keinem der vier Sterne erkennen
Robert Zebahl
Leipzig (Germany)
102mm (62x) Components A, B, E and F are easily visible. The two southern stars on the drawing do not belong to the system. ../projects/double-stars/robert-zebahl/sketches/2019-06-23_beta_lyr.jpg
Uwe Pilz
Leipzig (Germany)
105mm (139x) AB: Begleiter ist tiefrot; die Natur des Systems ist unsicher ../projects/double-stars/uwe-pilz/sketches/betaLyr.jpg
Uwe Pilz
Leipzig (Germany)
105mm (144x) schon sichtbar bei 26x, aber schwierig. A blauweiß, B orange. ../projects/double-stars/uwe-pilz/sketches/191031betaLyr.jpg
Jörg S. Schlimmer
Germany
127mm (108x) easy to split ../projects/double-stars/joerg-schlimmer/sketches/Zeichnung-beta-Lyrae_filtered_96dpi.jpg
Sarah Gebauer
Germany
150mm (85x) AB: weit getrennt, viele helle Feldsterne
BU265 7m.4 9m.2 1.5" 227° 2018 Aql 18h50m14.94s / +11°31'21.50"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Very tremulous B star appears with seeing, surprisingly difficult for the mag, maybe because so close.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint but resolved B at outer diffraction ring when seeing stills. Yellow A, bluish B.
STF2404 6m.9 7m.8 3.7" 181° 2019 Aql 18h50m45.55s / +10°58'35.20"
Robert Zebahl
Leipzig (Germany)
70mm (44x) Already at 22x the double star is striking due to its orange color. At 44x split, but rather tight with a clear difference in brightness. At 100x the primary component appears in a bright orange, the secondary component shows a bluish tint.
Mark McCarthy
Fremont (California/USA)
203mm (667x) Light orange and light blue, pretty.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) beide gelblich ../projects/double-stars/frederik-wanink/sketches/STF2404.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) well split, yellow A and yellow-orange B.
RST4605 11m.2 11m.6 0.9" 141° 1995 Aql 18h50m58.96s / -02°38'02.20"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Very, very fine, faint, split, quarter delta mag. Very tough considering proximity to nearly full moon with poor transparency. Nice!
STF2409 AB 8m.5 9m.6 0.9" 22° 2015 Her 18h51m43.74s / +13°31'06.90"
Mark McCarthy
Fremont (California/USA)
178mm (333x) Very nice, 2 delta, very finely split pair, excellent. WDS uncertain, and unfortunately no Gaia data for the B star
COU1012 9m.6 10m.9 0.4" 239° 2009 Lyr 18h51m49.06s / +31°05'00.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Split best moments at 667x, suspect elongation 553x. Always elongated but needs seeing to still for split. Noticeable difference in mag, about one delta mag, but the stars are so close together is hard to tell.
STI865 11m.6 12m.1 3.7" 179° 2018 Dra 18h51m54.46s / +59°48'56.60"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Faint but well seen, nicely split ~4", nice hard points
STF2408 8m.5 9m.4 2.3" 91° 2019 Aql 18h51m58.05s / +10°46'48.90"
René Merting
Drachhausen (Germany)
100mm (142x) bei 107x berühren sich die beiden Sterne noch - bei 142x ist es immer noch nicht sehr einfach, aber in guten Momenten sehe ich beide Sterne ganz knapp getrennt - B im Osten ist deutlich schwächer
Mark McCarthy
Fremont (California/USA)
203mm (667x) With seeing, 1.5 delta mag well split pair, nice. (not physical)
HU199 9m.1 9m.5 0.9" 345° 2015 Aql 18h52m07.48s / +11°47'54.30"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Wow! With seeing very tight very faint but split near equal. very cool.
STF2411 AB 6m.6 9m.6 13.3" 95° 2019 Her 18h52m18.63s / +14°32'08.00"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x und mit etwas Geduld wird östlich vom Hauptstern ein sehr schwacher Begleiter sichtbar, knapp getrennt - Komponente A gelblich, Komponente B ziert sich
Mark McCarthy
Fremont (California/USA)
178mm (205x) Bright light yellow and 3 delta bluish B, wide. In a rich field. WDS uncertain but the Gaia data looks promising: 9% parallax range overlap, 1,913 AU separation, higher mass 2.74/1.24, and the radial velocity delta is *just* less than the escape velocity
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty orange A with 2 delta mag fainter B, ~7".
COU1311 11m.7 12m.4 1.3" 223° 2008 Lyr 18h52m18.70s / +37°13'21.10"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Very faint, B needed foveal coaxing to come out then I could hold it, very tough. Suspected at 205x.
HDS2677 Aa-Ab 8m.3 12m.1 1.0" 81° 2018 Lyr 18h52m27.43s / +26°32'05.60"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Pale yellow star resolved as a point on the first diffraction, very faint, only when seeing tightens
STF2412 9m.0 9m.0 1.4" 57° 2015 Her 18h52m35.04s / +14°00'12.20"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Nice! Very fine near equal pair, <2". WDS uncertain, but the Gaia data seems good: 40% parallax range overlap, 491 AU separation, high stellar mass 2.48/2.49, so they are likely gravitationally bound
ES1746 10m.5 11m.1 1.8" 114° 2015 Dra 18h52m50.17s / +58°14'48.90"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Fairly faint, slight mag difference, well split ~2"
TDT1106 10m.6 10m.9 0.5" 257° 1991 Aql 18h52m50.94s / +08°10'34.20"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Marginal, maybe a smear but too tentative.
TDT1116 11m.1 11m.3 0.6" 330° 1991 Lyr 18h53m38.40s / +40°28'13.10"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Notched elongation only. Seeing not supporting more.
TDT1118 11m.3 11m.4 0.6" 161° 1991 Lyr 18h53m39.35s / +30°08'06.30"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Averted vision flashes elongation, but this one is very tough. Without AV I see a tight notched rod, very small, with notable difference in brightness.
BU137 AB 8m.7 9m.0 1.5" 169° 2015 Lyr 18h53m57.56s / +37°22'49.70"

../images/binary-star-orbits/BU137-AB-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) ../projects/double-stars/frederik-wanink/sketches/BU137.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Fine near equal light orange, ~2". Rich finder field. In Steph 1 open cluster.
Mark McCarthy
Fremont (California/USA)
508mm (667x) Nice bright white near equal stars, 1.5", in a two plus one system with much fainter farther C. (AC 12th mag 23.6")
HU1294 9m.6 10m.6 1.6" 118° 2014 Lyr 18h54m14.83s / +32°14'12.70"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Well split, 1.5 delta mag, 2" sep, light orange and blue stars. pretty.
HO90 8m.7 12m.7 4.0" 228° 2017 Lyr 18h54m27.98s / +37°18'45.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Light orange star, B shows up only with averted vision, appears out of the haze as a brightening.
delta 2 Lyr, 12 Lyr, delta Lyrae Cluster, Stephenson 1 ES2028 AB 4m.3 11m.2 86.3" 349° 2014 Lyr 18h54m30.29s / +36°53'55.00"
ES2028 BC 11m.2 11m.6 2.1" 135° 2008
SMR13 AD 4m.5 8m.8 193.1" 210° 2014
SMR13 AE 4m.5 10m.3 400.6" 238° 2014
SMR13 AF 4m.5 8m.8 369.4" 245° 2014
SMR13 AG 4m.5 9m.8 335.9" 261° 2014
SMR13 AH 4m.5 8m.7 229.4" 284° 2014
SMR13 AJ 4m.3 12m.0 279.5" 249° 2014
SMR13 AK 4m.3 12m.0 304.2" 236° 2014
SMR13 HI 8m.7 12m.9 26.1" 251° 2015
Jörg S. Schlimmer
Germany
305mm (94x) easy to split ../projects/double-stars/joerg-schlimmer/sketches/Zeichnung-delta-Lyrae_filtered_96dpi.jpg
Mark McCarthy
Fremont (California/USA)
508mm (205x) ES2028 (BC): Delta 2 Lyr. ! Very cool. A is bright light orange, and BC are blue pinpoints, ~2" with a slight mag difference. Clearly and cleanly seen.
STTA176 AB 7m.5 7m.5 94.3" 112° 2018 Aql 18h54m30.59s / +01°53'51.50"
AC 7m.5 10m.8 155.5" 2015
BD 7m.5 11m.0 150.2" 358° 2015
CD 10m.8 11m.0 82.0" 119° 2015
René Merting
Drachhausen (Germany)
18x70 AB: trotz des riesigen Abstandes zwischen den beiden Sternen sieht dieses Paar richtig schick aus - beide Sterne sind gleich hell und haben kaum Konkurrenz im unmittelbaren Umfeld - wie zwei Augen, die einen beobachten
STF2415 7m.1 8m.7 2.0" 290° 2015 Her 18h54m32.84s / +20°36'55.10"
Mark McCarthy
Fremont (California/USA)
152mm (175x) ! Light yellow-white A and blue B closely split, just a little more than 1 delta mag, very fine
Mark McCarthy
Fremont (California/USA)
203mm (333x) Nice pair, 2 delta mag, well separated.
Mark McCarthy
Fremont (California/USA)
203mm (667x) Two delta mag, ~2". Used the 8" mask to clean up the star images, but the view in the 20" was more colorful, yellow A and bluish B.
L41 9m.7 10m.7 1.7" 32° 2000 Lyr 18h54m34.41s / +36°59'48.60"
Mark McCarthy
Fremont (California/USA)
508mm (667x) B reveals itself with averted vision, and as its haze fades can hold a tiny point well separated, 3 delta mag.
BRT3335 AB 11m.9 11m.7 10.0" 69° 2015 Lyr 18h54m35.26s / +27°54'16.50"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Easy near equal, wide. These are the central stars of an arc of four. [not physical. DAL 5 AC is likely one of these additional stars in the arc, 12.07 26.2".]
COU1932 10m.3 10m.4 0.9" 297° 2016 Lyr 18h54m51.24s / +44°36'56.20"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Suspect at 205x, nice clean split with 333x. white stars, slight mag difference
ES2029 10m.0 11m.4 5.1" 207° 2015 Lyr 18h54m51.46s / +36°10'49.80"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Easy wide pair, slightly blue-white. B is more blue, since fainter. 2 delta mag. (not physical)
HO270 AB 5m.4 12m.6 8.4" 300° 2013 Lyr 18h54m52.18s / +41°36'09.80"
Mark McCarthy
Fremont (California/USA)
508mm (205x) ! Bright yellow A and very faint B seen with averted vision then held direct, with another faint star one ninety degrees different PA and three times farter out (this is AC). There is a streak of grainy stars across the field, very rich.
★★ STT525 & SHJ282 STT525 AB 6m.1 9m.1 1.8" 130° 2015 Lyr 18h54m52.52s / +33°58'06.90"
SHJ282 AC 6m.1 7m.6 45.4" 350° 2018
SHJ282 AD 6m.1 11m.0 214.8" 295° 2015
Christopher Hay
Seeheim (Germany)
10x42 SHJ282 (AC): Stabilised binoculars, handheld. Wide split, the A component yellowish. Alias South 282. According to Stelledoppie a physical double.
Robert Zebahl
Leipzig (Germany)
16x70 SHJ282 (AC): 2020-07-06: Easy, striking with reasonably apparent color contrast: yellowish to slightly orange & bluish.
Christopher Hay
Seeheim (Germany)
60mm (15x) SHJ282 (AC): Wide split. Blue colour of C component much more striking than the orange colour of the A component.
Robert Zebahl
Leipzig (Germany)
70mm (22x) SHJ282 (AC): Fairly bright and wide pair. The double star was conspicuous, especially in regard to its color: A appeared orange, C rather grey-bluish. It could be observed together with Messier 57 and beta & gamma Lyrae. Very nice.
René Merting
Drachhausen (Germany)
76mm (18x) SHJ282 (AC): bei 18x ist das Pärchen schon sehr auffällig - A ist hellgelb mit schönem Kontrast zur nördlich stehenden, gut getrennten B-Komponente - bei 57x präsentiert sich B in einem zarten stahlblau
Uwe Pilz
Leipzig (Germany)
105mm (21x) SHJ282 (AC): Orange und türkis ../projects/double-stars/uwe-pilz/sketches/191031SHJ282.jpg
Uwe Pilz
Leipzig (Germany)
105mm (180x) STT525 (AB): gelbweiß-blau
Christopher Hay
Seeheim (Germany)
125mm (23x) SHJ282 (AC): Widely split, dominates the field of view, very attractive. A component is tangerine orange, C component ice blue. An echo of Albireo. A true physical pair.
Mark McCarthy
Fremont (California/USA)
152mm (285x) STT525 (AB): Suspected at 175x, best seen 285x. Orange A, subtle elongation to notched with best seeing, unequal. Wide SHJ 282 AC also seen. WDS uncertain but there is a -34% parallax overlap, so it's not possible to be
Mark McCarthy
Fremont (California/USA)
178mm (205x) STT525 (AB): Extremely fine point shows just outside bright white A's first diffraction, only with best seeing and when A is a perfect disk. WDS uncertain, however unfortunately there is -34% parallax overlap, it is not physical
Christopher Hay
Seeheim (Germany)
180mm (200x) SHJ282 (AC): A is very distant from C but the two are still a fine pair. Colour of C is more striking than that of A, in a manner similar to my simultaneous observation with 60mm at 15x, but not quite as pronounced.
C has a companion set off from it by a hair of black. I estimate PA from C at approx. 80°, separation very roughly 2". Surprisingly can't find this companion in the double star catalogues.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) STT525 (AB): 3er System, sehr schwierig wegen Helligkeitsunterschied ../projects/double-stars/frederik-wanink/sketches/STT525.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) SHJ282 (AC): Wide separation orange and blue, 2 delta mag.
Frederik Wanink
Itterbeck (Germany)
254mm STT525 (AB) ../projects/double-stars/frederik-wanink/photographs/STT%20525.jpg
Claus-Dieter Jahn
Leipzig (Germany)
SHJ282 (AC): TS APQ 65/420mm, ZWO ASI 178mc, Livestack with Sharpcap, Exposure time: 1600x 0.6s ../projects/double-stars/claus-dieter-jahn/photographs/2020-04-07_shj282.jpg
A258 8m.9 9m.9 0.3" 236° 2016 Lyr 18h54m59.91s / +30°52'45.50"

../images/binary-star-orbits/A258-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (667x) Very tough. I get elongation at 553x, and more clear elongation at 667x, but no split, not even notching, more like an unevenly illuminated rod. Seeing not support higher power.
WFC216 9m.1 9m.6 12.0" 89° 2016 Her 18h55m04.26s / +16°44'20.30"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Slightly unequal white stars, framed with two 10th mag stars on either side, equidistant away. WDS uncertain, but they do not share any parallax range overlap
TDT1125 10m.9 11m.1 0.5" 345° 1991 Lyr 18h55m04.61s / +36°11'08.70"
Mark McCarthy
Fremont (California/USA)
508mm (667x) In same field as L 41. Very fine, hairline split only with seeing elongated otherwise.
ES1657 10m.4 11m.0 3.9" 355° 2015 Lyr 18h55m22.99s / +40°52'12.00"
Mark McCarthy
Fremont (California/USA)
508mm (205x) White A and light red B, ~1 delta mag, wide ~4"
COU511 Aa-Ab 9m.7 9m.9 0.7" 190° 2016 Her 18h55m23.68s / +23°24'00.10"
Mark McCarthy
Fremont (California/USA)
508mm (533x) ! Wow great pair. A star rather bright with B very close-in, ~1 delta mag, the tiniest pin prick <1" separated from A
STF2419 9m.1 9m.4 3.4" 178° 2018 Lyr 18h55m28.52s / +29°13'35.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal white, ~5"
COG1 AB 9m.3 11m.9 26.2" 284° 2015 Her 18h55m43.67s / +12°54'30.10"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Unremarkable, wide, 1.5 delta magnitude white stars, maybe in a triple as a third star a little farther out forms a triangle (this is AC). Not physical per WDS, and no data on the companion in Gaia. W.A. Cogshall, assistant to T.J.J. See at the Lowell Observatory, but by 1903 he was observing with the 12-inch at the Kirkwood observatory where this discovery was made, following a list made by Burnham of stars suspected to be double by the Albany observers
A2193 8m.8 9m.2 1.0" 357° 2017 Ser 18h55m51.23s / +03°22'30.80"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Pair of white stars, half delta mag. found very quickly slew to. Nice pair. Very clean split.
STF3130 & STT365 STT365 AB 7m.2 8m.3 0.2" 359° 2016 Lyr 18h55m57.14s / +44°13'41.90"
STF3130 AB-C 7m.0 10m.5 2.6" 257° 2016
STF3130 AB-D 7m.0 12m.0 181.2" 310° 2003
Mark McCarthy
Fremont (California/USA)
152mm (175x) STF3130 (AB-C): Very fine, B very much fainter and red color. B appears with seeing, very close (AB is 0.4" and doable with 20-inch)
Mark McCarthy
Fremont (California/USA)
317mm (553x) STF3130 (AB-C): Extremely faint but present direct vision, white A and blue B, 4" 3-4 delta mag. Did not see AB 0.4". Nearby R Lyr which is a pretty orange.
Mark McCarthy
Fremont (California/USA)
317mm (553x) STT365 (AB): Very fine, white and blue stars, ~4", 3 delta mag. Nice!
Mark McCarthy
Fremont (California/USA)
508mm (205x) STF3130 (AB-C): Very nice bright white A and slightly red B well split from A, three delta mag. Did not notice the 0.4" AB pair STT 365
STF2421 8m.1 9m.3 24.6" 57° 2015 Lyr 18h56m01.68s / +33°47'08.10"
René Merting
Drachhausen (Germany)
76mm (57x) bei 57x ein eher unauffälliges, ordentlich getrenntes Sternpaar - Komponente B im Nordwesten ist eine Magnitude schwächer
Uwe Pilz
Leipzig (Germany)
105mm (88x) orange und blaugrün ../projects/double-stars/uwe-pilz/sketches/191031STF2421.jpg
Uwe Pilz
Leipzig (Germany)
105mm (137x) recht weit, einfach
STF2417, theta Ser, 63 Ser, Alya AB 4m.6 4m.9 22.4" 106° 2019 Ser 18h56m13.18s / +04°12'12.90"
AC 4m.6 6m.8 421.0" 58° 2007
René Merting
Drachhausen (Germany)
10x35 AB: wunderschön für diese Vergrößerung - zwei helle dicht beieinander stehende Sterne, knapp getrennt - die hellsten Sterne im Umfeld
René Merting
Drachhausen (Germany)
10x50 AB: zwei helle schneeweiße Sterne, knapp getrennt - B im Osten ist nur knapp schwächer - ein schönes enges Pärchen
René Merting
Drachhausen (Germany)
16x70 AB: ein gut getrennt zu sehendes Pärchen - beide Sterne stahlen weiß, Komponente B im Osten ist keine halbe Größenklasse schwächer
René Merting
Drachhausen (Germany)
100mm (20x) AB: bei 20x ein auffälliges gut getrenntes Sternpaar - Komponente B östlich ist nur leicht schwächer und strahlt ein wenig warm-weißer
Sarah Gebauer
Germany
100mm (73x) AB: die mit deutlichem Abstand bei 73x getrennten Doppelsterne liegen wie in einem U aus recht gleich hellen Sternen und bilden dabei im Süden den unteren Bereich des Buchstabens ../projects/double-stars/sarah-gebauer/sketches/STF%202417.jpg
Stefan Loibl
Rosenheim (Germany)
102mm (102x) AB: wide pair, hardly any difference in brightness, wonderful field, double stars looks like an embedded pair of eyes
Berthold Fuchs
Wiesbaden (Germany)
130mm AB: easy DS ../projects/double-stars/berthold-fuchs/photographs/theta%20Ser.png
TDS955 10m.5 11m.1 0.9" 146° 2007 Dra 18h56m21.13s / +58°54'26.10"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Very fine, resolved with seeing, ~1 delta mag ~1", pretty difficult.
HJ1356 AB 8m.4 9m.3 29.3" 342° 2015 Lyr 18h56m22.13s / +45°30'25.40"
René Merting
Drachhausen (Germany)
100mm (20x) bei 32x zeigen sich zwei schwache ordentlich getrennte Sterne - Komponente A im Süden ist dabei doppelt so hell wie B, eine Größenklasse Helligkeitsunterschied
TDT1139 10m.8 11m.8 2.9" 242° 2016 Lyr 18h56m32.12s / +26°51'50.30"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Faint pair not quite equal, wide ~4". Seems an elongated haze behind it, as if in front of galaxy , or unresolved stars [Checked DSS, no galaxy behind it, and not particularly dense with stars]
ES2422, OQ Lyr 9m.0 12m.0 5.6" 179° 2017 Lyr 18h56m51.24s / +31°12'03.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange with very faint, very wide, averted vision.
BU648 AB 5m.3 8m.0 1.3" 243° 2015 Lyr 18h57m01.61s / +32°54'04.60"

../images/binary-star-orbits/BU648-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
152mm (285x) Orange A and a just split, very small, very faint B, seen only with 285x --175x suspected, 456x image quality not good. Short period pair, it will make a half revolution by 2045
Mark McCarthy
Fremont (California/USA)
317mm (553x) 277x an orange not quite round disk, suspected a close pair. At 553x it splits with seeing, 0.8", 3 delta mag, in diffraction.
★★ STF2422 7m.9 8m.2 0.8" 68° 2018 Her 18h57m07.83s / +26°05'45.10"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Excellent hairline split at 333x with eight inch. Near equal white stars. Picked them out in a crowded field, suspected elongation right away, split with seeing as I centered it in eyepiece, and from then it was a steady split
Frederik Wanink
Itterbeck (Germany)
254mm (640x) schwieriger wegen schwacher Sterne ../projects/double-stars/frederik-wanink/sketches/STF2422.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very tight, <0.8", equal light orange, pretty faint.
STF2438 7m.0 7m.4 0.8" 357° 2019 Dra 18h57m28.47s / +58°13'30.00"

../images/binary-star-orbits/STF2438-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) leicht; beide gleich hell ../projects/double-stars/frederik-wanink/sketches/STF2438.jpg
Mark McCarthy
Fremont (California/USA)
508mm (333x) Hairline split, white stars, near equal. 261.6 year period, look how fast it will move in the years 2150-2160!
A260 9m.2 9m.6 0.9" 247° 2017 Lyr 18h57m34.07s / +32°09'20.20"
Mark McCarthy
Fremont (California/USA)
508mm (667x) At 8", small and faint suspected split at 333x: 8" 667x stars are hazy. At 20" 667x got a clean wide split two hard paints of stars.
HJ5505 9m.4 9m.5 14.4" 122° 2019 Aql 18h57m42.01s / +09°42'01.80"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Near equal wide white stars.
A587 BC 10m.6 11m.5 1.8" 188° 2017 Lyr 18h57m55.98s / +44°07'00.00"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Excellent 2+1 pair, bright A, BC wide and 1 delta mag, well split ~2"
AG366 8m.5 8m.7 1.4" 185° 2018 Lyr 18h58m03.46s / +47°11'30.10"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Near equal yellow-white easy split
STF2427 BC 9m.9 10m.2 7.2" 79° 2017 Lyr 18h58m08.22s / +38°13'47.60"
Mark McCarthy
Fremont (California/USA)
178mm (205x) AB are near equal and wide, BC is very slightly fainter, well split itself. It appears as a slightly hooking line of three stars. 9 stars in the system. WDS says this is physical due to parallax, and it appears it is: 3% of range overlap but it's only 549 AU separated, stellar mass 0.90/0.85, and the radial velocity delta is less than the escape velocity
ES2670 AB 9m.4 12m.4 11.2" 71° 2015 Lyr 18h58m13.92s / +30°10'52.30"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Wide two delta mag
HO91, FF Aql AB 5m.4 10m.1 7.0" 146° 2015 Aql 18h58m14.75s / +17°21'39.40"
Mark McCarthy
Fremont (California/USA)
152mm (175x) FF Aql. Lovely deep orange A with very faint bluish well separated B, just detected and held with direct vision. WDS is uncertain, but there is 8% parallax overlap, 3,508 AU weighted separation, and high stellar mass 6.74/1.75, so may well be gravitationally bound
Mark McCarthy
Fremont (California/USA)
508mm (667x) FF Aql. Yellow light star but no pair seen with mask, but the pair is obvious when I used full 20" aperture, sitting just above the primary, well split, 4 delta mag.
STF2429 8m.4 10m.0 5.5" 289° 2017 Lyr 18h58m26.49s / +36°25'33.10"
René Merting
Drachhausen (Germany)
76mm (57x) bei 57x ist B sehr schwach und leicht abgesetzt westlich von A erkennbar - B ist wie ein Geist von A - bei 95x ist B dann besser sichtbar und noch mehr abgesetzt
René Merting
Drachhausen (Germany)
100mm (64x) bei 64x knapp getrennt, der Begleiter west-nordwestlich ist sehr schwach
Mark McCarthy
Fremont (California/USA)
508mm (667x) Wide three delta mag white and very light orange. easy
COU1797 10m.1 11m.8 1.2" 180° 2007 Lyr 18h58m28.31s / +42°14'34.10"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Easy close split, ~1 delta. Nice
TDT1158 10m.6 10m.9 8.3" 229° 2018 Lyr 18h58m36.54s / +29°04'07.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Quite faint pair, transparency poor so extinction not helping, but wide and near equal. There is a third star about the same distance ninety degrees from this PA, assume is part of the pair (not physical)
COU817 11m.3 11m.3 1.0" 198° 2009 Lyr 18h58m42.66s / +27°45'01.10"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Very tight but fairly well split near equal stars, transparency and seeing not cooperating, but can split when seeing allows
STF2431 6m.2 9m.6 19.0" 236° 2013 Lyr 18h58m46.59s / +40°40'45.10"
René Merting
Drachhausen (Germany)
100mm (20x) bei 32x zeigt sich ein gut getrenntes sehr ungleiches Paar - Komponente A im NO strahlt creme-weiß, Komponente B dagegen ist nur knapp erkennbar und leicht bräunlich - Helligkeitsunterschied 3-4 Größenklassen - zurück auf 20x ist B auch noch gerade so zu erkennen
Mark McCarthy
Fremont (California/USA)
317mm (553x) Easy wide yellow-white & bluish pair.
TDT1161 11m.4 11m.6 1.5" 2015 Lyr 18h58m52.26s / +42°18'25.40"
Mark McCarthy
Fremont (California/USA)
508mm (205x) In same field as COU 1797 and with a similar PA. Faint, near equal, easy split
BU649 8m.7 11m.9 0.9" 2007 Lyr 18h58m53.75s / +32°28'32.80"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Not difficult, showed right away on edge of field as an elongated smear which resolved with seeing and in the center of field, used averted vision to bring out B star
AGC9, gam Lyr AB 3m.2 12m.1 13.5" 307° 2015 Lyr 18h58m56.62s / +32°41'22.40"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Sulafat. B star immediately picked out of A's glow like a piece of debris suspended in the explosion, a planet almost hanging in the halo.
HU332 9m.7 9m.6 0.5" 267° 2016 Vul 18h59m03.72s / +22°30'03.20"

../images/binary-star-orbits/HU332-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (533x) Beautiful close split, a little more than hairline, light orange stars near equal
STF2424, 11 Aql AB 5m.3 9m.3 20.8" 304° 2019 Aql 18h59m05.73s / +13°37'21.20"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ist nordwestlich von Komponente A deutlich getrennt ein ganz schwacher Begleiter erkennbar - Komponente A zeigt keinen Farbstich, durch den großen Helligkeitsunterschied wirkt B dumpf, kein echter Farbkontrast, aber immer wieder schön anzusehen
Mark McCarthy
Fremont (California/USA)
317mm (277x) Orange star with very much fainter B, nearly AV only. Very wide separation.
Mark McCarthy
Fremont (California/USA)
317mm (553x) 11 Aql. Yellow and very much fainter blue B, wide separation.
TDT1168 9m.6 11m.5 1.8" 250° 2002 Dra 18h59m17.70s / +59°28'45.50"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Nice white and blue pair, easily seen, ~2 delta ~2"
A1387 AB 9m.1 10m.0 0.3" 351° 2011 Dra 18h59m20.43s / +54°50'12.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Notched elongation, white stars. Seeing not good enough to split
STF2430 9m.1 9m.2 1.5" 187° 2015 Lyr 18h59m22.10s / +29°36'11.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Fine near equal ~1.5"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Easy pair, hard white points, near equal mag, well separated
ES1844 AB 9m.6 10m.5 3.0" 19° 2015 Dra 18h59m30.05s / +63°47'34.50"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Faint pair, significant mag difference, B noticed with averted vision before holding direct, well split ~3"
ENG65, 13 Aql AB 4m.1 10m.6 122.0" 184° 2014 Aql 18h59m37.39s / +15°04'06.50"
AC 4m.1 11m.2 142.9" 159° 2014
BC 10m.6 11m.2 59.8" 102° 2015
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Bright star and very wide separated, very much fainter B.
Mark McCarthy
Fremont (California/USA)
317mm (553x) BC: Two very faint stars, about half delta mag, wide separation.
ES1748 9m.4 10m.8 6.6" 55° 2018 Dra 18h59m44.10s / +55°43'25.90"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Easy ~1 delta mag wide pair
STF2428 AB 8m.2 10m.3 6.9" 287° 2019 Aql 18h59m56.53s / +14°54'39.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 3 delta mag, wide yellow and blue.
STF2426 AB 7m.5 9m.0 16.5" 261° 2019 Aql 18h59m58.76s / +12°53'24.10"
BC 9m.0 13m.5 4.2" 173° 2015
René Merting
Drachhausen (Germany)
100mm (32x) AB: bei 32x ein gut getrenntes Pärchen, wobei die östliche Komponente A gelblich strahlt, Komponente B eher gräulich
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB: Near equal orange, very wide separation.
COU1798 11m.5 11m.8 0.6" 349° 1995 Lyr 18h59m59.58s / +41°00'54.00"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Hairline split at best moments, noticeable mag difference.
ES2236 9m.2 13m.2 7.3" 179° 2015 Lyr 19h00m12.11s / +34°48'24.70"
Mark McCarthy
Fremont (California/USA)
508mm (667x) B seen averted vision only, fades to point in its after glow--like an old tube tv turning off. Wide split, big delta mag
HU677 10m.0 10m.5 1.7" 42° 2015 Aql 19h00m13.11s / +13°02'51.50"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Very nice equal stars, nicely split about 2". WDS uncertain but chances are it is gravitationally bound: 31% parallax range overlap, 1,318 AU separation, 2.68/2.45 solar mass
ES1326 9m.3 10m.4 2.4" 228° 2016 Lyr 19h00m21.32s / +44°59'51.80"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Nicely split pair, noticeable mag difference ~1", white
TDT1178 10m.5 10m.8 0.9" 336° 2015 Lyr 19h00m29.20s / +27°16'12.00"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Very fine pair, very tight, splits with seeing a little more than half a disk, almost one delta mag
ES1429 AB 9m.7 11m.1 6.1" 12° 2015 Lyr 19h00m29.30s / +43°13'14.10"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Easy wide ~2 delta mag light yellow pair
STF2425 7m.9 8m.6 29.5" 177° 2018 Aql 19h00m33.93s / -08°06'31.80"
René Merting
Drachhausen (Germany)
10x50 ein sehr schwaches knapp getrenntes Sternpaar - die hellere Komponente steht im Norden
René Merting
Drachhausen (Germany)
18x70 ein einfacher Doppelstern - beide Komponenten sind komfortabel getrennt voneinander zu erkennen, im Sternumfeld wirken sie dennoch schön eng zusammen stehend - die südliche Komponente wirkt kühler, bläulicher und ist maximal eine halbe Größenklasse schwächer
René Merting
Drachhausen (Germany)
100mm (20x) bei 32x fällt neben der gelb strahlenden Komponente A weit getrennt südlich ein weiß-oranger Begleiter auf, Komponente B nur gering schwächer - zurück auf 20x ein schönes eng stehendes Pärchen, auffällig im sonst recht farblosen Umfeld wegen des schönen Farbkontrastes
COU1156 11m.1 11m.2 0.7" 111° 2016 Lyr 19h00m34.25s / +33°01'24.80"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Near qual small and at best moments a clean split, still, just nice points. great star
HU678 8m.8 11m.1 2.9" 359° 2016 Aql 19h00m34.37s / +12°13'34.20"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Almost 3 delta mag, fairly well split but close pair. WDS says not physical, but they're wrong: 51% parallax overlap, 1,017 AU separation, 2.44/1.47 solar mass
HO92 10m.6 10m.8 1.3" 40° 2015 Lyr 19h00m59.89s / +32°33'11.60"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Beautifully well split, had an instant of perfect images. White pair near equal.
J1280 11m.7 12m.0 3.9" 108° 2016 Vul 19h01m00.47s / +22°05'34.50"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Faint pair slight mag difference, wide ~3". Not physical
ALI382 12m.0 11m.7 14.7" 78° 2017 Lyr 19h01m15.00s / +36°20'50.10"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Widely separated faint stars, I wonder how thought it was a double: similar mag, proper motion, spectra? (not physical)
HJ1362, 16 Lyr AB 5m.0 10m.6 46.9" 289° 2003 Lyr 19h01m26.36s / +46°56'06.10"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x steht B westlich ganz schwach leicht außerhalb des Halos von A - bei 64x umkreisen insgesamt 5 schwache Sterne die A-Komponente, deshalb wirkt AB nicht wie ein klassisches Doppelsternpaar
Mark McCarthy
Fremont (California/USA)
317mm (553x) 16 Lyr. Faint star at edge of direct vision, fairly well separated.
STF2432 AB 6m.8 10m.4 14.8" 87° 2015 Aql 19h01m48.60s / +12°32'27.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) White and 3-4 delta mag B, very wide separation.
Mark McCarthy
Fremont (California/USA)
508mm (205x) 3 delta mag, yellow-white A, wide. WDS uncertain but it might be physical: 20% parallax overlap, a little far 6,699 AU separation, but high solar mass 4.36/1.75
STF2437 8m.4 8m.8 0.6" 2019 Sge 19h01m53.16s / +19°10'11.70"

../images/binary-star-orbits/STF2437-orbit.jpg

Mark McCarthy
Fremont (California/USA)
178mm (333x) Light orange, snowman only. Physical with a 804.6-year period
Mark McCarthy
Fremont (California/USA)
317mm (553x) Small faint, notched peanut when seeing stills. Orange.
ES1965 10m.7 12m.5 7.5" 245° 2015 Lyr 19h02m04.33s / +36°39'47.30"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Easily picked out, 2 delta mag, wide separated stars, pretty
STF2450 A-BC 6m.5 9m.5 5.1" 298° 2017 Dra 19h02m07.04s / +52°15'40.10"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Bright yellow and fainter yellow orb for B. 2-3 delta mag, ~5".
ES1430 10m.7 11m.7 1.6" 109° 2010 Lyr 19h02m23.15s / +42°30'26.40"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Delicate pair, good with seeing, >0.5 delta mag.
STF2441 AB 7m.8 9m.8 6.2" 264° 2015 Lyr 19h02m41.26s / +31°23'58.50"
AC 7m.8 11m.2 101.2" 135° 2015
René Merting
Drachhausen (Germany)
100mm (64x) AB: bei 64x zeigt sich Komponente B knapp getrennt westlich von A - Komponente B ist deutlich schwächer
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: 2 delta mag, ~10"
Mark McCarthy
Fremont (California/USA)
508mm (667x) AB: White and slightly greenish, wide, 2 delta mag. (AC very widely separated)
STF2434 A-BC 8m.4 8m.9 27.8" 88° 2019 Aql 19h02m44.38s / -00°42'40.40"
René Merting
Drachhausen (Germany)
76mm (18x) bei 29x einfach, A und BC stehen ordentlich auseinander und haben einen ordentliche Farbkontrast, der aber immer hin und her zu springen scheint - zurück auf 18x ist das Pärchen noch immer gut getrennt zu erkennen - der Doppelstern ist schön anzusehen, er wird im Westen von einer gebogenen Kette aus sechs Sternen flankiert, die sich wie eine Schnecke einkringeln (ein großer Bogen, der immer enger wird)
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein auffallendes, schön zusammen stehendes Sternpaar mit einem Farbkontrast, der nicht richtig greifbar ist - B wirkt kühler in der Farbe und ist vielleicht eine viertel Größenklasse schwächer
Robert Zebahl
Leipzig (Germany)
120mm (18x) Easily split with similar brightness.
ES480 AB 10m.3 11m.3 2.4" 273° 2015 Lyr 19h02m55.78s / +27°42'26.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Nice pair, wide split, bluish, half delta mag. (I should try again, WAK 3 AC is 11.65 1.1")
A589 9m.5 10m.1 0.7" 2017 Lyr 19h03m01.81s / +42°32'45.80"
Mark McCarthy
Fremont (California/USA)
508mm (533x) ! Exceedingly fine pair, split with seeing, ~1 delta mag, white A and blue B. In the same field with ES 1430.
A2991 10m.4 10m.8 0.7" 82° 2016 Vul 19h03m23.53s / +25°11'19.60"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Suspect elongation with 205x. B has a significant mag difference than A, maybe half delta, very closely separated <1"
ALI613 13m.3 13m.6 9.0" 237° 2015 Lyr 19h03m36.82s / +37°24'49.70"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Wide separation, near equal faint stars. Can see it direct vision. Averted vision needed at thirteenth magnitude if close to another star. Not a challenge at all (not physical)
ARG33, BH Dra 8m.5 9m.2 10.6" 57° 2018 Dra 19h03m39.54s / +57°27'25.90"
Mark McCarthy
Fremont (California/USA)
508mm (205x) BH Dra. White stars, ~1 delta mag, wide
STF2448 8m.8 8m.8 2.5" 191° 2019 Lyr 19h03m39.66s / +35°44'34.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal white, 3-4"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Easy near equal white, 2"
BRT1949 11m.1 11m.4 4.1" 295° 2015 Aql 19h03m39.85s / +17°08'15.40"
Mark McCarthy
Fremont (California/USA)
508mm (205x) In same field as STF2442, faint, slight magnitude difference, white, about 4" separation. WDS uncertain, but there is parallax overlap, -46%
STF2442 AB 8m.5 9m.8 9.9" 210° 2019 Aql 19h03m42.21s / +16°57'57.80"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ist A schwach und orange, B südlich ist gut getrennt erkennbar, noch schwächer und farblich nur noch als "dunkel" zu bezeichnen, dadurch aber ein auffälliger Farbkontrast -runter auf 20x kann ich B leider nicht orten - der Doppelstern bildet mit einigen 7-9 mag hellen Sternen nördlich ein markantes Muster wie ein Angelhaken (oder einer Häkelnadel, wenn man bedenkt, wie eng der Bogen südlich geschwungen ist) - STF2442 bildet dabei die Spitze der Rundung des Hakens - sehenswert innerhalb dieses Musters
Mark McCarthy
Fremont (California/USA)
508mm (205x) Light orange A and blue B, wide, 2 delta. WDS says not physical, and that's correct, no parallax range overlap (-96%)
BU1285 AB 7m.3 12m.8 11.2" 289° 2018 Lyr 19h03m55.60s / +34°09'04.60"
AC 7m.3 10m.7 41.8" 208° 2018
Mark McCarthy
Fremont (California/USA)
317mm (553x) AC: White A and wide faint B.
Mark McCarthy
Fremont (California/USA)
508mm (667x) AB: Thirteenth mag B easily picked out within the very bright A's glow.
STF2443 8m.9 9m.3 6.8" 311° 2019 Aql 19h04m04.23s / +14°47'01.90"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Slight magnitude difference white stars, fairly wide. WDS not physical
COU1935 10m.6 11m.1 1.1" 41° 2015 Lyr 19h04m11.37s / +38°58'47.40"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Very fine near equal, well split, 1", white. Verified on chart.
BRD4 9m.2 9m.6 2.6" 310° 2018 Lyr 19h04m15.19s / +32°45'16.80"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Near equal white, wide
DA9 7m.0 10m.2 2.0" 172° 1991 Lyr 19h04m15.72s / +43°52'49.50"
Mark McCarthy
Fremont (California/USA)
152mm (285x) Suspected with 175x, solid split and resolution of B with 285x. Very faint B condenses with seeing. A is light blue color
Mark McCarthy
Fremont (California/USA)
178mm (205x) I've seen this a few times, always a challenge in different apertures. Very fine white point outside bright white A's diffraction, with seeing. WDS says physical but sadly there is -5% parallax range overlap, not gravitationally bound
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint but perfect star images showing. 3 delta mag, ~5".
Mark McCarthy
Fremont (California/USA)
508mm (205x) Used apodising mask to clean up A's disk image. B appears as a light blue disk nicely separated, diamond ring to white A. Nice
J1209 11m.5 12m.3 4.4" 155° 2017 Lyr 19h04m25.08s / +34°06'19.90"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Easy pair, wide, bluish, two delta mag
STF2445 AB 7m.2 8m.6 12.4" 262° 2015 Vul 19h04m38.50s / +23°19'45.50"
AC 7m.2 8m.5 143.8" 108° 2015
BC 8m.6 8m.5 155.1" 106° 2015
René Merting
Drachhausen (Germany)
100mm (20x) AB: bei 32x Trennung eindeutig - gut 1.5 Magnituden Helligkeitsunterschied, Komponente B wirkt trotzdem erstaunlich weiß-grau im Vergleich zur weißen A-Komponente - bei 20x ist B mit etwas Konzentration auch schon knapp getrennt westlich von A erkennbar
Mark McCarthy
Fremont (California/USA)
152mm (175x) AB: Clean white A and slightly red B, 1 delta mag, wide. A slightly fainter red star is at the edge of the field
Mark McCarthy
Fremont (California/USA)
203mm (333x) AB: Wide separated ~1.5 delta mag.
Mark McCarthy
Fremont (California/USA)
508mm (205x) AB: Lovely wide pair, ~2 delta mag, light yellow A and dull B
ES2237 10m.3 10m.6 9.9" 218° 2018 Lyr 19h04m40.41s / +33°34'26.00"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Wide near equal pair, white, easily picked out
TDT1213 10m.4 11m.4 2.2" 255° 2015 Lyr 19h04m50.67s / +29°44'15.40"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Picked out at edge of field, a nice two delta mag pair, 2", could be a two plus one system
COH1 10m.8 11m.1 9.4" 315° 2015 Lyr 19h04m55.99s / +28°28'27.10"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Wide separation half delta mag, easy pair
★★ 15 Aql, SHJ286 5m.5 7m.0 39.6" 211° 2019 Aql 19h04m57.67s / -04°01'53.10"
René Merting
Drachhausen (Germany)
8x30 beide Sterne zeigen sich gut getrennt, wobei B im Süden lediglich dunkler wirkt, Farben sind nicht wirklich erkennbar
René Merting
Drachhausen (Germany)
10x50 sehr auffälliges dicht zusammen stehendes Sternpaar - Komponente A im Norden ist hellgelb, B grau-orange, schöner Farbkontrast
René Merting
Drachhausen (Germany)
12x50 ein ordentlich getrenntes Sternpaar - A im NO ist weißgelb, B wirkt gelborange
René Merting
Drachhausen (Germany)
16x70 ein wunderschönes ordentlich getrenntes Sternpaar - Komponente A im NO samtgelb, B dagegen apricot-orange und gut 1.5 Magnituden schwächer als A - zudem ein interessanter Farbvergleich möglich zu dem mit im Gesichtsfeld stehenden V Aql gut 1.7° weiter südlich, der farblich noch eine Schippe drauf legen kann mit einem kräftigen zinnober-orange
Robert Zebahl
Leipzig (Germany)
70mm (22x) Striking, pretty wide, uneven pair. Primary component gleamed in shiny orange, the companion appeared slightly orange.
René Merting
Drachhausen (Germany)
76mm (29x) bei 29x ein weit getrenntes Pärchen, B ist eine Größenklasse schwächer - A ist buttergelb, B wirkt noch etwas dunkelgelblicher
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x weit getrennt, Komponente A hellgelb, B dagegen orangefarben - sehenswert
Sarah Gebauer
Germany
150mm (125x) gut gefunden, beide Sterne stehen in weitem Abstand zueinander
Robert Zebahl
Leipzig (Germany)
200mm (37x) Conditions in the target region: SQM-L 19.9
Easy to split, evident. Both components appeared slightly orange colored.
STF2453 8m.6 10m.6 13.5" 86° 2015 Lyr 19h05m05.80s / +40°07'33.10"
Mark McCarthy
Fremont (California/USA)
178mm (205x) White A and pretty wide faint B. Not physical
BU359 AB 8m.8 9m.8 4.6" 81° 2019 Vul 19h05m09.69s / +23°25'57.00"
Mark McCarthy
Fremont (California/USA)
508mm (205x) In the same field as STF 2445, and is a smaller and flipped analog of it. It's the opposite PA dimmer but with similar mag difference, just smaller scale. Not physical
ALI614 12m.7 12m.8 10.1" 90° 2015 Lyr 19h05m10.34s / +38°03'25.90"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Fainter pair of a double-double in field, both about the same wide separation (AG 227 the other pair)
TDS964 9m.9 11m.2 1.3" 73° 2015 Lyr 19h05m11.00s / +40°22'20.20"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Very nice yellow A and fainter B, 1", 1.5-2 delta mag. Fine pair
BU466 9m.0 9m.6 2.0" 164° 2016 Aql 19h05m13.65s / +10°49'41.70"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Very fine white pair, slight magnitude difference, nice close split, very pretty. WDS uncertain, however they likely are gravitational: 16% parallax range overlap (with 0% error), 330 AU weighted separation, 1.62/1.40 solar mass. Discovered with the 6-inch at 1.6"
AG227 10m.7 11m.2 7.1" 31° 2015 Lyr 19h05m22.05s / +38°03'20.60"

../images/binary-star-orbits/AG227-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (667x) This is the brighter pair of the double-double pair mentioned in last entry (ALI 614). White stars, brilliant, wide separation
BU287, zet Aql AB 3m.0 12m.0 7.2" 46° 2009 Aql 19h05m24.61s / +13°51'49.40"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Deneb el okab. B quite easily seen as a faint companion to brilliant white A, wide ~7", very large delta mag. Burnham discovered it with the 26-inch at the USNO in 1874 during a short stint there -- at 5.53" so it was tougher and probably needed that aperture to discover
HU940 9m.2 9m.8 0.4" 187° 2016 Lyr 19h05m30.86s / +33°52'21.50"

../images/binary-star-orbits/HU940-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (667x) Hairline at 445x, split with 667x, slightly unequal white stars. Physical with 111.6-year period, it will tighten in the next couple of decades
STF2446 AB 7m.0 8m.9 9.5" 153° 2019 Aql 19h05m47.70s / +06°32'49.20"
AC 7m.0 11m.2 37.2" 347° 2015
René Merting
Drachhausen (Germany)
100mm (32x) AB: bei 32x ein gut getrenntes Pärchen, Begleiter südöstlich schwach - aufgrund des Helligkeitsunterschiedes Farbunterschied wahrnehmbar, Komponente A strahlt weiß mit einem Stich ins gelbliche, B eher wie ein Kupferkessel in der Nacht von innen - STF2446 ist ein schönes Doppel-Doppel zusammen mit dem 37' nördlich stehenden STF2449, wo die Komponenten einen ähnlichen Abstand haben
Mark McCarthy
Fremont (California/USA)
178mm (205x) AB: Light reddish orange A and blue B, wide, 1 delta magnitude. WDS says physical, and it most certainly is: 80% parallax range overlap, 595 AU weighted separation, good 1.59/1.03 solar mass, and the radial velocity delta, 0.32, is less than the escape velocity, 2.79
TDS965 11m.0 11m.4 1.4" 165° 2015 Lyr 19h05m57.44s / +33°54'17.00"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Seeing very briefly hardened and these split to distinct points out of an elongated smear.
STF2463 AB 9m.1 10m.8 9.7" 2015 Lyr 19h06m01.16s / +45°48'50.50"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Light orange-yellow A and light blue B, wide, ~1 delta. Not physical
COU1614 9m.9 9m.9 0.5" 117° 2016 Lyr 19h06m03.06s / +35°48'45.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Very tough given the conditions, but getting a suspect elongation at 667x and at 1067x I get moments of a notch within the haze, and a definite magnitude difference. Marginal. Transparency and seeing not cooperating.
TDT1223 11m.3 11m.7 2.5" 41° 2015 Lyr 19h06m04.39s / +33°35'25.60"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Easier to see than last pair (TDS 965), wider split, half delta mag
STF2454 AB 8m.3 9m.7 1.3" 291° 2016 Lyr 19h06m09.37s / +30°26'18.80"

../images/binary-star-orbits/STF2454-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Fine yellowish pair, ~1.5"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Nice well split 2 delta mag, white A reddish B. (DRD 2 AC is 13.50 mag and 31.3")
EHR16, lambda Aql, 16 Aql AB 3m.5 7m.5 12.5" 30° 2009 Aql 19h06m14.95s / -04°52'56.40"
Robert Zebahl
Leipzig (Germany)
70mm (133x) 2020-07-29: The companion can be seen to some extent as an elongated brightening in the first diffraction ring of the primary component. It still appears intermittently as a fragment of the diffraction ring.
STF2449 7m.2 7m.7 8.0" 289° 2015 Aql 19h06m23.04s / +07°09'20.10"
Robert Zebahl
Leipzig (Germany)
70mm (22x) At 22x well separable, but quite close together. Some fainter and similarly bright stars in the immediate surrounding. At 57x small difference in brightness. Main component looked white-bluish, companion slightly orange.
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein knapp getrenntes Pärchen - B-Komponente westlich nur unwesentlich schwächer - beide Sterne heiraten in weiß - STF2449 ist ein schönes Doppel-Doppel zusammen mit dem 37' südlich stehenden STF2446, wo die Komponenten einen ähnlichen Abstand haben
Mark McCarthy
Fremont (California/USA)
178mm (205x) Pretty pair, wide, white stars, <1 delta magnitude. WDS uncertain, but there is no overlap in their parallax ranges, so for sure not physical
HO97 AB 9m.9 9m.8 0.8" 15° 2016 Lyr 19h06m25.55s / +31°44'24.40"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Clean split with seeing, white, half delta mag. Nice.
ZUL1 10m.5 10m.5 1.4" 165° 2013 Lyr 19h06m34.88s / +33°55'03.40"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Discovered in 1984. Elongated smear with 7-inch, with the 20-inch I had nicely split light yellow-orange near equal stars. Very pretty. D.J. Zulevic, of Serbia, who has two discoveries. No data on the B star in Gaia
STF2447 AB 6m.8 9m.6 14.1" 343° 2019 Aql 19h06m35.11s / -01°20'46.00"
AC 6m.8 14m.0 12.9" 192° 2015
René Merting
Drachhausen (Germany)
76mm (29x) AB: bei 29x ist B nordwestlich von A knapp abgesetzt erkennbar - B ist extrem schwach - bei 57x dann ordentliche Trennung und B ist weiterhin sehr schwach
René Merting
Drachhausen (Germany)
100mm (32x) AB: bei 32x zeigt sich B knapp getrennt nordwestlich von A und ist deutlich schwächer - A präsentiert sich weiß, B ist grauweiß - ein eher unauffälliges Paar
S710 6m.1 8m.4 6.4" 2016 Sgr 19h06m52.12s / -16°13'45.40"
René Merting
Drachhausen (Germany)
76mm (57x) bei 57x zeigt sich B genau nördlich von A wie so eine kleine Bommel - ein sehr ungleiches Paar, ich schätze 3 Größenklassen Helligkeitsunterschied (2.32 mag lt. Stelle Doppie) - A strahlt weiß und B … naja … was bleibt der schwachen Komponente anderes übrig, als grau zu schimmern
WFC217 10m.2 11m.1 7.7" 335° 2015 Lyr 19h06m52.15s / +34°10'02.10"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Easy yellow and blue, wide, one delta mag
STF2458 AB 9m.7 10m.4 11.3" 227° 2015 Lyr 19h06m52.39s / +27°45'09.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal pretty wide.
★★ STF2455 AB 7m.4 9m.4 9.6" 28° 2015 Vul 19h06m53.00s / +22°10'21.50"
AC 7m.4 12m.3 99.6" 20° 2015
René Merting
Drachhausen (Germany)
100mm (32x) AB: bei 32x noch dicht beieinander, bei 64x gut getrennt - wie STF2455 und der nahe STF2457 (25' südlicher) sich gegenüberstehen und die jeweils schwächere Komponente in Richtung des anderen Doppelsterns vor sich herschiebt, das hat was - als ob die beiden Fußball spielen (die jeweilige Komponente A hat einen Ball vor den Füßen) - zwischen den beiden Doppelsternen steht ein schwacher Stern, vermutlich der verwirrte Schiedsrichter
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB: Yellow and yellow-orange, 1 delta mag, very wide.
Mark McCarthy
Fremont (California/USA)
508mm (205x) AB: Wide ~2 delta mag, light yellow-white A and dull B. Not physical
HEI568, 18 Aql 5m.4 6m.4 0.3" 257° 2015 Aql 19h06m58.60s / +11°04'16.70"

../images/binary-star-orbits/HEI568-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (410x) 18 Aql. The A star is elongated / smeared but 410x does not resolve, seeing not good enough.
STT369 7m.8 7m.9 0.7" 2018 Dra 19h07m06.37s / +72°04'26.60"

../images/binary-star-orbits/STT369-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) zeitweilig gut erkennbar ../projects/double-stars/frederik-wanink/sketches/STT369.jpg
★★ STF2457 7m.5 9m.5 10.2" 201° 2015 Vul 19h07m08.02s / +22°35'03.70"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x gut getrennt, bei 64x schon ein ordentlicher Abstand - wie STF2457 und der nahe STF2455 (25' nördlicher) sich gegenüberstehen und die jeweils schwächere Komponente in Richtung des anderen Doppelsterns vor sich herschiebt, das hat was - als ob die beiden Fußball spielen (die jeweilige Komponente A hat einen Ball vor den Füßen) - zwischen den beiden Doppelsternen steht ein schwacher Stern, vermutlich der verwirrte Schiedsrichter
Christopher Hay
Seeheim (Germany)
150mm (96x) Widely split. Attractive together in 0.8-degree FOV with Struve 2455AB a little less than half a degree south. The secondaries of the two doubles point towards each other, a nice sort of double-double. According to Stelledoppie 2457 is a physical double, while 2455AB is not. In 2457 the brightness of both components is less than those of 2455AB, their separation greater, and their colour contrast (itself hard to define) is greater. In 2455AB focussing on the A-component precisely is hard to achieve, perhaps due to an unresolved field star very close to it?
Mark McCarthy
Fremont (California/USA)
152mm (175x) Very faint B seen with averted vision only, around 2" separation
Mark McCarthy
Fremont (California/USA)
203mm (333x) Pale yellow stars, wide separation, 1.5 delta mag.
A703 9m.0 9m.3 0.6" 189° 2016 Lyr 19h07m12.17s / +44°50'30.40"
Mark McCarthy
Fremont (California/USA)
508mm (533x) B is a very fine small point which resolves within A's diffraction ring with seeing only. A is a light yellow white. Very tough. No Gaia data on the B star
STF2459 9m.1 10m.1 13.8" 232° 2015 Lyr 19h07m22.01s / +25°58'23.90"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Easy wide, ~1 delta
STF2461, 17 Lyr AB 5m.3 9m.1 3.2" 281° 2017 Lyr 19h07m25.58s / +32°30'06.20"
René Merting
Drachhausen (Germany)
100mm (142x) nichts zu holen für mich bis 142x, vermutlich verhindert der große Helligkeitsunterschied die Trennung
Robert Zebahl
Leipzig (Germany)
152mm (129x) At 129x clearly split. The B component was just visible as pretty faint, tiny star. At 270x much easier visible.
Mark McCarthy
Fremont (California/USA)
152mm (175x) Elongation only up to 380x
Mark McCarthy
Fremont (California/USA)
317mm (553x) 17 Lyr. Yellow and red, much fainter B ~3 delta mag.
Mark McCarthy
Fremont (California/USA)
508mm (667x) 17 Lyr. Huge delta mag. B is obvious in 20", though A's diffraction was horrible. Used mask to clean it up but the B star momentarily disappeared, though I could eventually pull it back out with seeing and critical focus. 4 delta mag.
STF2469 AB 7m.9 9m.1 1.3" 126° 2015 Lyr 19h07m47.60s / +38°55'41.60"
Uwe Pilz
Leipzig (Germany)
105mm (130x) nicht trennbar, Begleiter zu schwach
Mark McCarthy
Fremont (California/USA)
152mm (175x) Faint A and very faint, 2 delta mag B, split with seeing with 175x, a steady and close split with 285x. WDS is uncertain but it very likely is gravitationally bound: 30% parallax overlap, 181 AU weighted average, stellar mass 1.85/1.43
Mark McCarthy
Fremont (California/USA)
178mm (205x) Only get an elongation at this aperture, a bit too close and faint. WDS uncertain, but its chances are good, 30% parallax overlap, 181 AU separation, 1.85/1.43 stellar mass
Mark McCarthy
Fremont (California/USA)
317mm (553x) Split when seeing stills. <1", ~1 delta mag.
A704 10m.3 10m.5 1.2" 280° 2018 Lyr 19h07m53.09s / +46°52'06.00"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Very fine split, white near equal, ~1"
STF2466 AB 8m.6 9m.0 2.3" 104° 2018 Lyr 19h07m53.72s / +29°48'02.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal 3" light orange
Mark McCarthy
Fremont (California/USA)
508mm (667x) Hard white points, well separated, one delta mag., white (surprised it is not physical)
ENG66 AB 6m.2 10m.8 132.3" 288° 2007 Sge 19h07m57.32s / +16°51'12.10"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Light yellow A and super-wide B. This pair must have been suggested by proper motion data. WDS says not physical
STF2460 AB 10m.0 10m.2 9.5" 198° 2018 Sge 19h07m59.39s / +19°45'19.70"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Faint, wide, about 1 delta mag. Physical
STF2467 10m.1 10m.3 10.5" 262° 2015 Lyr 19h08m05.79s / +30°47'34.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal pretty wide, yellowish
Mark McCarthy
Fremont (California/USA)
508mm (667x) Wide separated white, near equal, 10x10th mag, 10"
TDT1243 11m.5 11m.6 2.2" 232° 2015 Lyr 19h08m16.62s / +36°08'04.60"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Faint but easily split pair, near equal white
COU420 8m.7 10m.8 1.2" 97° 2008 Lyr 19h08m17.42s / +25°55'25.40"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Finely split, <2 delta mag, bluish B.
TDT1245 11m.7 11m.7 0.7" 24° 1991 Lyr 19h08m21.23s / +29°04'18.60"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Marginal very barely split or rather a notched double haze. Very small and faint.
TDT1246 11m.2 11m.6 0.7" 97° 1991 Lyr 19h08m30.59s / +47°27'36.40"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Same field as A 704. Very fine B seen and split with seeing as a fine point, ~1 delta mag
★★ STF2470 7m.0 8m.4 13.8" 267° 2017 Lyr 19h08m45.20s / +34°45'37.10"
Robert Zebahl
Leipzig (Germany)
16x70 2020-07-06: Striking with well visible brightness difference. Very nice together with STF2474, which gives a similar view. A double-double for binoculars.
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x knapp getrennt - wunderschönes Synchrontänzer-Doppel-Doppel zusammen mit STF2474 unmittelbar 10' südlich, weil A und B bei beiden Paaren mit gleichen Helligkeiten und Positionswinkel strahlen - A-Komponente von STF2470 knapp schwächer als A-Komponente von STF2470
Robert Zebahl
Leipzig (Germany)
102mm (40x) Striking, especially with STF 2474 in one visual field. The color of the components was not clearly visible. Worthwhile! Sketch see STF 2474.
Sarah Gebauer
Germany
150mm (85x) nach mehreren Anläufen dann gefunden und bei 85x wie ein Doppel-Doppel im Bild, sehr sehenswert, auch der Abstandsunterschied (13,8'' bei STF 2470 und 15,9'' bei STF 2474) ist zu erkennen ../projects/double-stars/sarah-gebauer/sketches/20200723%20STF2470-4%20DSk.jpg
TDT1250 11m.9 12m.1 1.2" 172° 2015 Lyr 19h08m51.33s / +26°03'04.60"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Very finely split, faint blue pair, half delta mag.
★★ STF2474 AB 6m.8 7m.9 16.0" 263° 2019 Lyr 19h09m04.35s / +34°35'59.90"
Robert Zebahl
Leipzig (Germany)
16x70 2020-07-06: Striking with well visible brightness difference. Very nice together with STF2470, which gives a similar view. A double-double for binoculars.
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x knapp getrennt - wunderschönes Synchrontänzer-Doppel-Doppel zusammen mit STF2470 unmittelbar 10' nördlich, weil A und B bei beiden Paaren mit gleichen Helligkeiten und Positionswinkel strahlen - A-Komponente von STF2474 knapp heller als A-Komponente von STF2470 - bei 64x Komponente A ein wenig gelblich
Robert Zebahl
Leipzig (Germany)
102mm (40x) Pretty conspicuous, easy double star. Especially attractive with the nearby double star STF 2470, as both are very similar in brightness, distance and position angle. The color of both components appeared slightly yellowish-orange. ../projects/double-stars/robert-zebahl/sketches/2019-06-26_stf2470_stf2474.jpg
Sarah Gebauer
Germany
150mm (85x) nach mehreren Anläufen dann gefunden und bei 85x wie ein Doppel-Doppel im Bild, sehr sehenswert, auch der Abstandsunterschied (13,8'' bei STF 2470 und 15,9'' bei STF 2474) ist zu erkennen ../projects/double-stars/sarah-gebauer/sketches/20200723%20STF2470-4%20DSk.jpg
Christopher Hay
Seeheim (Germany)
150mm (96x) Widely separated. Component A yellowish, B light ice-blue. A true physical pair in 171 LY distance. Very attractive in field of view together with Struve 2470 about 10 arcseconds north. The components of each of the two Struves have almost the same position angles, similar separations and very similar delta-magnitudes. Struve 2470 is like an echo of 2474 but with no definite colour impression.
STF2464 8m.5 10m.1 1.2" 28° 2016 Aql 19h09m13.22s / +11°52'03.70"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Extraordinarily fine pair, nearly two delta magnitude, split very close, B is faint and visible with seeing only. Seen at 205x, better at 333x. WDS uncertain, but there is no overlap in their parallax ranges, -52%, so not physical
HO444 8m.7 10m.5 1.3" 67° 2016 Lyr 19h09m13.70s / +26°56'07.30"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Close split <1", significant magnitude difference >1 delta. White stars
TDS972 11m.1 11m.3 0.7" 311° 2008 Lyr 19h09m37.79s / +26°40'32.30"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Faint, finely split, slight mag difference
TDT1262 12m.1 12m.3 0.7" 92° 1991 Lyr 19h09m42.80s / +27°14'41.10"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Very faint, B is difficult, split and resolved with seeing, helped with foveal coaxing and I can hold it direct after. Noticeable magnitude difference, <1 delta.
COU2279 10m.3 10m.6 0.7" 125° 2008 Lyr 19h10m01.22s / +42°24'37.80"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Nice firm split with seeing, white near equal
STF2475 9m.2 11m.3 6.8" 321° 2018 Sge 19h10m25.71s / +17°44'09.50"
Mark McCarthy
Fremont (California/USA)
178mm (205x) B is faint, can just hold direct vision brightens with averted vision, 2 delta mag and wide
A152 AB 10m.5 10m.6 2.6" 2018 Lyr 19h10m33.10s / +37°00'51.10"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Attractive triple, the close pair is around 2" and near equal, C is wide and one delta. All the stars are white. Not physical
STF2471 7m.5 10m.6 8.6" 122° 2015 Aql 19h10m56.93s / +08°07'17.60"
Mark McCarthy
Fremont (California/USA)
178mm (205x) White A and very faint wide reddish B, 3 delta mag yet still seen with direct vision, very nice. WDS uncertain, but they most certainly are gravitational: 80% parallax range overlap with 0% error, 812 AU weighted separation, 1.73/0.85 solar mass
Mark McCarthy
Fremont (California/USA)
317mm (553x) Detected B with averted vision. Wide and white, can hold B directly when I know where it is.
STF2481 A-BC 8m.4 8m.3 4.8" 18° 2019 Lyr 19h11m07.90s / +38°46'48.40"
René Merting
Drachhausen (Germany)
100mm (64x) bei 32x kann ich zwei gleich helle dicht aneinander stehende Sterne mit Einschnürung erkennen - in guten Momenten berühren sich die Sterne nur leicht - bei 64x dann ein knapp getrenntes Pärchen, die nördliche stehende Komponente mit zartem Gelbstich
Uwe Pilz
Leipzig (Germany)
105mm (130x) gleichhell, einfach
Mark McCarthy
Fremont (California/USA)
152mm (175x) Light orange stars, near equal, well separated. (I need to try this with the 20-inch, BC is 0.2" and only one delta mag.)
Mark McCarthy
Fremont (California/USA)
152mm (175x) Near equal, white, wide. BC is SE 2 and 0.2" 8.31/9.40 63-year period -- a great target for my 20-inch
SE2 BC 8m.3 9m.4 0.1" 21° 2010 Lyr 19h11m07.99s / +38°46'52.40"

../images/binary-star-orbits/SE2-BC-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (1334x) This is a component of STF2481 which I viewed through the 6-inch recently. I see a very slight elongation to B all powers, but no resolution or notching. Physical with a 62.79-year period, it will thankfully widen and be a far easier target (at 0.3") by 2030
AG373 10m.4 11m.1 3.0" 328° 2018 Lyr 19h11m20.45s / +27°05'28.70"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Light yellow-white A and deeper yellow B, ~2 delta mag, wide
A151 8m.6 9m.6 0.6" 158° 2016 Sge 19h11m22.81s / +21°15'39.20"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Very subtle notched elongation, white stars, seeing not supporting higher powers
Frederik Wanink
Itterbeck (Germany)
254mm (640x) nicht als DS gesehen
OL63 10m.3 11m.4 1.9" 57° 2001 Aql 19h11m28.50s / +09°32'53.40"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Very faint B seen with averted vision, more than 1 delta mag, close about 2". C.P. Olivier, founder of the American Meteor Society, and there's even a biography about him. WDS is uncertain, however they likely are gravitationally bound: 52% parallax range overlap, 387 AU weighted separation, 1.43/1.05 solar mass
J1263 BC 12m.9 14m.0 8.6" 40° 2015 Lyr 19h11m28.70s / +29°53'10.20"
Mark McCarthy
Fremont (California/USA)
508mm (205x) AB is the easy bright light orange star and the very wide blue pair of BC, which are wide and ~1 delta mag. Not physical
STF2480 7m.7 10m.2 15.1" 23° 2015 Lyr 19h11m45.03s / +26°14'57.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 2 delta mag, very wide yellow-white and blue.
STF2486 AB 6m.5 6m.7 7.1" 204° 2019 Cyg 19h12m05.03s / +49°51'20.70"

../images/binary-star-orbits/STF2486-AB-orbit.jpg

René Merting
Drachhausen (Germany)
15x56 eine Ameise mit Nordost-Südwestausdehnung - Einschnürung nur leicht
Robert Zebahl
Leipzig (Germany)
16x70 2020-07-03: Fine split, but very tight with equally bright components.
Robert Zebahl
Leipzig (Germany)
70mm (22x) At 22x barely split with a slight difference in brightness. At 44x the primary looked orange. I could not determine the color of the companion.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal yellow pair.
HU941 7m.5 11m.0 1.1" 146° 2009 Lyr 19h12m14.80s / +32°15'10.00"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Very much fainter B lies on yellow-orange A' diffraction ring. There is no parallax overlap, -53%, so these are not gravitationally bound
STF2483 AB 8m.0 9m.1 10.0" 317° 2015 Lyr 19h12m23.60s / +30°20'51.90"
AC 8m.0 9m.7 71.2" 236° 2015
BC 9m.1 9m.7 70.4" 228° 2015
René Merting
Drachhausen (Germany)
100mm (32x) AB: bei 20x zeigt sich nordöstlich am Hauptstern eine Andeutung von einer Lichtquelle - bei 32x dann ein fein säuberlich getrenntes Pärchen, wobei B nur unwesentlich schwächer scheint - der Doppelstern bildet mit drei schwächeren Sternen ein längliches Südost-Nordwest verlaufendes Parallelogramm
Robert Zebahl
Leipzig (Germany)
152mm (49x) 2020-06-24: At 22x, all three components are well visible and form a prominent, acute-angled triangle with the dim C component at the apex. At 49x color differences become visible: A appears white-yellowish, B slightly bluish and C rather orange.
Mark McCarthy
Fremont (California/USA)
508mm (205x) AB: Easy wide A is greenish yellow-white, and B is ice blue.
WFC218 9m.8 10m.2 9.5" 352° 2016 Lyr 19h12m29.46s / +44°47'18.20"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Nice near equal white
BU139 & STTA177, V338 Sge BU139 AB 7m.1 8m.0 0.6" 136° 2017 Sge 19h12m34.45s / +16°50'47.20"
STTA177 AC 7m.1 8m.0 98.4" 276° 2017
BU139 AE 7m.1 11m.2 28.8" 101° 2015
BU139 CD 8m.0 11m.2 138.9" 269° 2015

../images/binary-star-orbits/BU139-AB-orbit.jpg

Mark McCarthy
Fremont (California/USA)
80mm (13x) STTA177 (AC): Near equal wide pair split in finder
Mark McCarthy
Fremont (California/USA)
152mm (456x) BU139 (AB): Very subtle notched unequal elongation at all powers. Physical with a 587-year period, currently coming of apastron, it will continue to tighten. Component of STT 177. Burnham discovered with his 6-inch in at 0.5", about what it is now, an astounding catch
Frederik Wanink
Itterbeck (Germany)
254mm (640x) BU139 (AB): getrennt, schwierig, 0,6"? ../projects/double-stars/frederik-wanink/sketches/BU139.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) STTA177 (AC): Very wide orange-yellow and blue, ~2-3 delta mag.
STF2482 9m.0 10m.2 1.8" 341° 2016 Sge 19h13m02.20s / +19°08'20.60"
Mark McCarthy
Fremont (California/USA)
178mm (205x) B is very faint and flashes with averted vision, and I can barely hold it direct, very closely split. WDS uncertain
HO573 9m.8 10m.2 7.6" 126° 2015 Sge 19h13m17.36s / +19°33'47.70"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Fairly wide, white A and faint B which brightens with averted vision. WDS uncertain
SHJ289 8m.0 8m.7 39.2" 56° 2015 Lyr 19h13m29.33s / +39°02'15.90"
Uwe Pilz
Leipzig (Germany)
105mm (130x) einfach
STF2487, eta Lyr, 20 Lyr, Aladfar AB 4m.4 8m.6 28.4" 81° 2017 Lyr 19h13m45.49s / +39°08'45.50"
AC 4m.4 11m.4 161.5" 151° 2014
René Merting
Drachhausen (Germany)
100mm (20x) AB: bei 64x ein weit getrenntes Pärchen, Komponente B ist deutlich schwächer - zurück bis auf 20x, auch da ist B knapp getrennt östlich vom Hauptstern erkennbar - der starke Glow von A reicht nicht aus, um B zu überstrahlen - die Annäherung an diesen Doppelstern ist besser von höheren Vergrößerungen kommend
STF2485 AB 8m.5 11m.4 8.5" 320° 2015 Vul 19h14m12.81s / +23°08'21.70"
Mark McCarthy
Fremont (California/USA)
178mm (205x) White A, B seen with averted vision only, well separated. WDS uncertain, but there is 75% parallax range overlap, 1,872 AU weighted separation, and 2.07/1.07 solar mass -- likely to be gravitationally bound
STF2484 7m.9 9m.5 2.1" 242° 2017 Sge 19h14m15.66s / +19°03'50.30"

../images/binary-star-orbits/STF2484-orbit.jpg

René Merting
Drachhausen (Germany)
100mm (142x) bis 142x probiert, keine Chance, Komponente B zeigt sich nicht
Mark McCarthy
Fremont (California/USA)
178mm (205x) Cream white A and yellow B, 2" separation, 2 delta mag, very pretty. Physical with a 1500-year period
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very close, ~2", orange, 1.5 delta mag.
A98 AB 6m.7 11m.0 22.5" 128° 2015 Aql 19h14m15.99s / -08°43'08.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint but direct vision B is a point. Very wide.
BU975 BC 9m.7 9m.8 1.0" 262° 2013 Lyr 19h14m29.16s / +34°33'51.00"
Mark McCarthy
Fremont (California/USA)
152mm (175x) Fine split, near equal white. No data on the B star in Gaia. Components of STF 2351
★★ STF2496 AB 6m.5 10m.0 2.1" 81° 2015 Cyg 19h15m19.18s / +50°04'16.00"
AC 6m.5 11m.2 186.1" 242° 2003
Robert Zebahl
Leipzig (Germany)
152mm (270x) AB: In steadier moments, the much fainter companion can be seen near the first diffraction ring of the primary component.
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Very much fainter B, a pin prick when seeing stills. 3 delta mag, ~2"
STTA178 5m.7 7m.6 89.6" 267° 2018 Aql 19h15m20.09s / +15°05'01.20"
Mark McCarthy
Fremont (California/USA)
152mm (175x) Subtle light orange A and stronger blue B, 2 delta mag, super wide. Finder split. WDS uncertain. There is 33% parallax overlap, and a pretty far 16,757 AU weighted separation, but stellar mass are on the high end, 3.89/2.27, so it might be gravitational
Mark McCarthy
Fremont (California/USA)
203mm (333x) Wide finder split, yellowish A, ~1 delta mag.
BRT1923 10m.2 10m.3 3.8" 187° 2015 Lyr 19h15m21.46s / +43°21'31.80"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Near equal white, ~4". Not physical
STF2488 9m.1 10m.0 1.8" 352° 2015 Sge 19h15m28.07s / +20°01'53.20"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Faint pair, quite closely separated, 1 delta mag, very nice
BLL37 6m.7 12m.4 139.4" 165° 2015 Sge 19h15m33.36s / +18°30'58.90"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Light orange and faint super-wide B. Not physical
STT371 AB 7m.0 7m.5 0.9" 161° 2018 Lyr 19h15m56.96s / +27°27'21.40"
AB-C 7m.0 9m.8 47.2" 269° 2019
René Merting
Drachhausen (Germany)
100mm (20x) AB-C: bei 20x ist Komponente C im Westen schwach erkennbar in einem ordentlichen Abstand zu Komponente AB
Robert Zebahl
Leipzig (Germany)
102mm (160x) 2021-08-20: At 28x the much fainter C component is clearly visible at quite a large separation. The tight pair AB showed up at 160x and 187x clearly elongated, partially as an '8'. A small difference in brightness could be guessed. Higher magnifications did not yield any gain. The air was only moderately steady (seeing 3/5).
Mark McCarthy
Fremont (California/USA)
152mm (104x) AB-C: Nice close 2 delta white stars. Not physical. Power too low to notice AB is 0.9" 7.05/7.55 and physical
Mark McCarthy
Fremont (California/USA)
203mm (333x) AB: Bright pair showed best masked down to 8-inches. Near equal, white stars, perfect!
Frederik Wanink
Itterbeck (Germany)
254mm (640x) AB: getrennt ../projects/double-stars/frederik-wanink/sketches/STT371.jpg
STT368 AB 7m.5 8m.5 1.1" 219° 2017 Aql 19h16m01.84s / +16°09'39.50"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Very nice, very close split, 1 delta mag, excellent pair. WDS uncertain, but very probably gravitational: 4% parallax range overlap with 2% error, 221 AU weighted separation, 2.43/1.91 solar mass, pretty high given the low AU separation
Mark McCarthy
Fremont (California/USA)
203mm (333x) Very fine 1 delta mag, ~1" split, white.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Definite split, 1/2 an airy disk width, near equal brightness.
STF2491 8m.6 9m.7 1.4" 230° 2016 Lyr 19h16m11.63s / +28°16'50.20"
Mark McCarthy
Fremont (California/USA)
203mm (205x) A is white, B is slightly bluish, ~1.5 delta mag, ~1"
KU57 AB 9m.7 10m.4 10.2" 230° 2018 Aql 19h16m14.48s / +15°33'31.40"
Mark McCarthy
Fremont (California/USA)
178mm (205x) 1 delta mag, wide, light orange. WDS says physical, and it is so: 22% parallax overlap, 783 AU weighted separation, 0.99/0.76 solar mass, and the radial velocity delta is less than the escape velocity
STF2489 AB 5m.7 9m.3 8.3" 347° 2013 Aql 19h16m26.78s / +14°32'40.60"
René Merting
Drachhausen (Germany)
100mm (64x) bei 64x ist Komponente B gut getrennt nördlich von A zu erkennen - der Helligkeitsunterschied zu ist A enorm, bestimmt mehr als 3 Größenklassen, deshalb wirkt B nicht wie ein Lichtpunkt, sondern eher wie ein bräunlicher kleiner Fleck
Mark McCarthy
Fremont (California/USA)
152mm (175x) Light yellow A and 2 delta mag yellow-orange B, wide. WDS says physical, but there is no parallax overlap -60%, it is not
Mark McCarthy
Fremont (California/USA)
178mm (205x) White A and 3 delta B, fairly wide. WDS says physical, but there is no overlap in their parallax ranges (-60%), so they are not
Mark McCarthy
Fremont (California/USA)
317mm (553x) Bright white and considerably fainter B. B rose up to view with averted vision, but was able to hold direct. ~5"
BU140 AB 6m.9 11m.7 49.0" 307° 2015 Aql 19h16m52.12s / -10°58'18.50"
BC 10m.4 10m.6 7.9" 213° 2018
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Two faint stars in about the same PA. 3 delta mag. to the A star, AB is the closer pair
Mark McCarthy
Fremont (California/USA)
317mm (553x) BC: Two faint stars in about the same PA. 3 delta mag. to the A star, BC is the two fainter stars as a binary
CSN12 AN 4m.7 5m.8 9.1" 285° 2000 Aql 19h16m55.23s / +05°10'07.10"
Robert Zebahl
Leipzig (Germany)
70mm (22x) 2019-07-03: Absolutely no star with the given magnitude visible at this position. An error in the WDS or is this a variable one?
STT370, V342 Aql AB 8m.3 8m.7 19.5" 14° 2015 Aql 19h17m03.16s / +09°20'19.60"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ist Komponente B nordöstlich nur unwesentlich schwächer - schönes Farbenspiel, Komponente A mit einem Stich ins kupferfarbene, Komponente B dagegen blass-orange
A267 AB 10m.0 10m.4 0.4" 181° 2007 Lyr 19h17m31.08s / +26°37'33.70"
Mark McCarthy
Fremont (California/USA)
508mm (667x) White stars hairline split, ~1 delta mag. Notched elongation at 533x.
★★ S715 7m.1 7m.9 8.4" 17° 2018 Sgr 19h17m39.96s / -15°58'01.70"
René Merting
Drachhausen (Germany)
76mm (29x) bei 29x auffällig, ein schönes enges, knapp getrenntes Paar - B im NW ist eine halbe Größenklasse schwächer -ein schönes Doppel-Doppel zusammen mit dem nur 6' östlich stehenden S 716
A1176 9m.9 10m.8 1.3" 105° 2017 Aql 19h17m40.90s / +10°14'58.50"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Nearly 1 delta mag very closely separated, about 1", white stars. WDS is uncertain, but there is no parallax range overlap, -69%, so the are not physical
BU248, 2 Vul AB 5m.4 8m.8 1.8" 128° 2015 Vul 19h17m43.64s / +23°01'32.00"
Mark McCarthy
Fremont (California/USA)
152mm (245x) 2 Vul. Nice! B seen just outside bright A's diffraction as a very small fine point, 3 delta mag. WDS is uncertain, but there's a good chance they are gravitationally bound: 24% parallax range overlap, 985 AU separation, 6.47/2.98 mass
Mark McCarthy
Fremont (California/USA)
203mm (205x) 2 Vul. White A and light blue B, split outside first diffraction ~1.5" really pretty. Burnham discovered in 1876 with his 6-inch at 1.86", "a fine pair with a moderate aperture"
★★ S716 8m.4 8m.6 5.0" 196° 2018 Sgr 19h18m05.55s / -15°57'13.40"
René Merting
Drachhausen (Germany)
76mm (57x) bei 29x sind beide Komponenten zu erkennen, können aber noch nicht getrennt werden - bei 57x dann gelingt die Trennung - ein deutlich schwächeres Par als das unmittelbar westlich stehende Sternpaar S 715, beide zusammen bilden aber ein schönes Doppel-Doppel - sie tanzen sogar synchron, wenn auch der Positionswinkel um 180° gedreht ist
HJ881 AB 7m.8 9m.8 32.0" 340° 2015 Aql 19h18m07.10s / -05°25'24.50"
BC 9m.8 10m.5 7.4" 307° 2015
René Merting
Drachhausen (Germany)
18x70 AB: Komponente B wird mit etwas Geduld ganz schwach nordwestlich von A sichtbar - Helligkeitsunterschied 2 Größenklassen - Trennung ordentlich
René Merting
Drachhausen (Germany)
100mm (32x) AB: bei 32x ist die Komponente B gut abgesetzt im Norden von A erkennbar - sehr unauffällig - auf Komponente C gut 7" weiter nordwestlich von B habe ich leider nicht geachtet
COU322 10m.4 10m.5 0.5" 25° 2008 Vul 19h18m11.69s / +22°31'06.40"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Near equal white stars, nice, split more than hairline, slight delta mag.
BU1256 9m.4 10m.0 1.7" 44° 2017 Aql 19h18m28.52s / +06°20'04.30"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Unequal yellow-white stars, about 2". Discovered with the Lick 36-inch. NGC 6781 is 12' north. WDS is uncertain, but there is no parallax range overlap, -10%
STF2492, 23 Aql AB 5m.3 8m.3 3.2" 2011 Aql 19h18m32.49s / +01°05'06.30"
AC 5m.3 13m.5 10.1" 70° 1999
René Merting
Drachhausen (Germany)
100mm (142x) AB: bei 107x klebt B noch an A und schimmert im Beugungsscheibchen von A - bei 142x ist B in guten Momenten ganz knapp getrennt erkennbar und kämpft gegen das erste Beugungsscheibchen von A an - Helligkeitsunterschied geschätzt 3 Größenklassen
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: 23 Aql. well split, a large difference in magnitudes. A bright orange, B bluish.
Mark McCarthy
Fremont (California/USA)
317mm (553x) AC: Faint star much further out was the AC, 13th mag ~10".
Mark McCarthy
Fremont (California/USA)
508mm (205x) AB: Bright yellow A and blue-green B, around 3" separation and 4 delta mag. AC seen too about 3 times the distance and almost a right angle difference. WDS says physical, and it's probably true: 54% parallax range overlap, 417 AU weighted separation, high 3.62/1.49 solar mass
STF2499 8m.8 9m.1 2.6" 325° 2018 Vul 19h18m33.52s / +21°56'51.60"
Mark McCarthy
Fremont (California/USA)
508mm (205x) White stars, near equal, wide
HO575 8m.0 11m.7 5.8" 10° 2015 Aql 19h18m47.20s / -05°46'20.90"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Best star images using 20" and 333x of 6" separated pair with 4 detla mag. I also tried a variety of combinations for this one: 8" 205x, Light orange star, no double seen. 8" 410x: no double seen. 8" 667x: Still none -- A is steady & round. 20" 667x: Light orange A messy by airy disk is there, the B star reveals itself, 6" and a hazy blue color. 20" 410x: Disks are smaller, B more clearly resolved. 20" 333x: Best star images. Observation made during poor transparency
AG432, U Sge 6m.5 9m.7 92.8" 318° 2015 Sge 19h18m48.41s / +19°36'37.70"
Mark McCarthy
Fremont (California/USA)
178mm (205x) White and super wide B. WDS uncertain
STFA40, 24 Aql AB 6m.5 6m.8 423.5" 316° 2015 Aql 19h18m50.94s / +00°20'20.40"
AC 6m.5 13m.2 49.5" 163° 2015
BD 6m.8 11m.6 60.4" 298° 2015
René Merting
Drachhausen (Germany)
18x70 AB: 24 Aql ist eigentlich eine FG-Empfehlung … nein, nicht wirklich schön - der Abstand zwischen den beiden Sternen ist soooo groß, die machen keinen Eindruck auf mich als Sternpaar - B im Nordwesten ist knapp schwächer - einen Farbunterschied kann ich nicht erkennen
René Merting
Drachhausen (Germany)
100mm (20x) AB: eine Empfehlung aus dem Buch von Sissi Haas - ich kann diesem Paar nicht wirklich etwas abgewinnen, der Abstand ist einfach zu groß - es gibt noch einige ähnlich helle Sterne im Umfeld - B im NW ist unmerklich schwächer - A samtgelb, B weiß, dadurch leichter Farbkontrast
A1646 9m.8 10m.6 4.5" 205° 2018 Aql 19h19m11.80s / +15°39'45.30"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Rich field. Slightly unequal stars, fairly wide, yellow-white. WDS is uncertain, but they are likely gravitational: 28% parallax overlap, 2,090 AU weighted separation, substantial 2.25/1.90 solar mass
ES1562 AB 9m.4 9m.8 6.2" 325° 2016 Lyr 19h19m16.98s / +42°17'02.30"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Easy wide ~6", ~1 delta
STF2500 A-BC 8m.2 10m.7 20.0" 23° 2015 Sge 19h19m26.19s / +19°43'06.10"
Mark McCarthy
Fremont (California/USA)
178mm (205x) White A and very faint wide B, not physical. Not seen, BC is COU 421, 0.4" 11.50/11.50
S717, 28 Aql AB 5m.5 9m.0 60.7" 175° 2015 Aql 19h19m39.34s / +12°22'28.80"
AC 5m.5 13m.3 73.6" 107° 2015
BC 9m.0 13m.3 75.9" 59° 2015
René Merting
Drachhausen (Germany)
12x50 AB: die B-Komponente ist schwach schimmernd weit abgesetzt im Süden von A erkennbar - mindestens 3 Größenklassen Helligkeitsunterschied -A ist reinweiß, bei B bin ich froh, den Stern erkennen zu können
STF2505 AB 8m.3 9m.5 10.9" 315° 2015 Lyr 19h19m52.83s / +35°32'16.60"
AC 8m.3 13m.3 20.8" 224° 2015
René Merting
Drachhausen (Germany)
100mm (32x) AB: bei 32x gut getrenntes Pärchen - Komponente B ist nur leicht schwächer als A - Komponente A ist nicht ganz weiß, mehr wie ein zarter Stich ins gelbliche
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Orange and blue, looks like Alberio, but fainter. Wide separation.
STF2497 7m.7 8m.5 29.3" 356° 2019 Aql 19h20m01.09s / +05°35'15.70"
René Merting
Drachhausen (Germany)
10x50 ein wenig Geduld war notwendig, aber dann zeigte sich Komponente B leicht abgesetzt nördlich von A - geringer Helligkeitsunterschied
René Merting
Drachhausen (Germany)
18x70 bei 18x ein ausgesprochen schickes Sternpaar - B zeigt sich nördlich von A gut getrennt, aber trotzdem noch eng seinem Partner stehend - Helligkeitsunterschied eine Dreiviertel Größenklasse - sonst gibt es kaum vergleichbare Sterne im Umfeld, so dass sich das Sternpaar schön prominent präsentieren kann
René Merting
Drachhausen (Germany)
100mm (20x) bei 32x einfach trennbar, auffällig - das Sternpaar steht schön isoliert - B im Norden ist eine dreiviertel Größenklasse schwächer und grau, A dagegen ist strahlend weiß - zurück auf 20x ist der Doppelstern auch noch gut getrennt mit eingängigerem Farbkontrast
Sarah Gebauer
Germany
100mm (45x) auf der Suche nach dem PN NGC 6781 zufällig entdeckt, steht recht isoliert im 1,8° großen Gf. und ist bei 45x sehr deutlich getrennt, zwei feine Pünktchen beieinander ../projects/double-stars/sarah-gebauer/sketches/STF%202497.jpg
STF2494 7m.0 10m.4 25.7" 89° 2006 Aql 19h20m02.80s / -06°37'40.80"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x steht B gut abgesetzt östlich von der Hauptkomponente - B ist sehr schwach, bestimmt 3 Magnituden Helligkeitsunterschied
STTA181 AB 7m.4 7m.5 62.7" 2018 Lyr 19h20m07.47s / +26°38'41.60"
AC 7m.4 12m.8 31.6" 170° 2018
BD 7m.5 12m.1 94.0" 43° 2018
Robert Zebahl
Leipzig (Germany)
152mm (22x) AB: 2020-06-24: Widely separated, small difference in brightness and beautiful color contrast: subtle orange and white-bluish.
ES2489, U Lyr AB 10m.2 13m.0 10.4" 190° 2015 Lyr 19h20m09.15s / +37°52'36.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Faint A and very faint B, wide pair. Needed averted to detect, then could hold direct vision.
STF2498 AB 8m.3 8m.9 12.1" 65° 2015 Aql 19h20m10.32s / +04°02'47.30"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Slightly unequal yellow stars, wide. WDS says physical, but there is no overlap in their parallax range, -24%, so they are not
COU1023 9m.5 9m.5 0.3" 146° 2007 Lyr 19h20m23.74s / +26°30'58.80"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Hairline split, very definite and consistent, near equal
STF2511 AB 7m.5 11m.1 7.2" 53° 2015 Cyg 19h20m31.45s / +50°20'24.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and very much fainter star could be B, wide separation, 3 delta mag, ~10"
STF2504 & WAL111 STF2504 AB 7m.0 9m.0 8.6" 282° 2015 Sge 19h20m59.85s / +19°08'43.40"
WAL111 AC 7m.0 12m.2 91.8" 101° 2015
Mark McCarthy
Fremont (California/USA)
152mm (175x) STF2504 (AB): Light yellow A and light blue B, wide 2 delta mag. WDS uncertain, but there is a good chance they are gravitationally bound: 13% parallax range overlap, 542 AU separation, and stellar mass of 1.57/0.97
Mark McCarthy
Fremont (California/USA)
203mm (205x) STF2504 (AB): Yellow and slight orange, 1.5 delta mag, well separated.
Mark McCarthy
Fremont (California/USA)
317mm (277x) STF2504 (AB): Yellow and slightly red, 2 delta mag, 10". Third star opposite PA, 2x the separation. (AB the first, second is AC, WAL 111)
Mark McCarthy
Fremont (California/USA)
317mm (277x) WAL111 (AC): Yellow and slightly red, 2 delta mag, 10". Third star opposite PA, 2x the separation. (AB the first, second is AC, WAL 111)
Berthold Fuchs
Wiesbaden (Germany)
130mm STF2504 (AB): easy DS ../projects/double-stars/berthold-fuchs/photographs/STF%202504.png
BU1129 7m.7 7m.8 0.3" 344° 2016 Cyg 19h21m36.09s / +52°22'34.90"

../images/binary-star-orbits/BU1129-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (889x) Light orange stars, obviously not single at 445x, and the disks separated as I powered up. Less than 1 delta mag, the best view with 889x, which showed a constant hairline split even with wavering seeing, PA NNW. A really nice pair. Spectral class A8III (white). 121.7-year period, currently 0.328" separated, it is approaching apastron now and will hang there until the 2050s. Burnham discovered in 1889 on the Lick 36-inch at 0.3" and noted "If [the proper motion in Ast. Gess. Catalogue]...is substantially correct, this is a physical system."
ES483, Z Vul 7m.3 12m.0 13.8" 2015 Vul 19h21m39.11s / +25°34'29.50"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Z Vul. Pale yellow A with slightly red color wide faint companion. Not physical
BU141 AB 7m.6 9m.2 0.9" 84° 2015 Vul 19h21m57.26s / +22°30'23.20"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Very finely split, ~2 delta mag, pale white A and light blue B. Burnham discovered in 1875 with his 6-inch
STF2501 AB 7m.8 9m.7 20.0" 21° 2015 Aql 19h22m03.68s / -04°44'20.00"
René Merting
Drachhausen (Germany)
18x70 puh, da habe ich lange gebraucht, bis ich B entdeckt habe - ich habe immer gedacht, das ist eine Unschärfe von A - B steht extrem knapp getrennt nördlich von A und ist deutlich schwächer
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x gut getrenntes Pärchen, Komponente A nördlich strahlt weiß, B nördlich strahlt … schwächer
HO105 8m.9 9m.9 2.8" 190° 2016 Sge 19h22m12.87s / +16°39'45.00"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Excellent pair at this aperture, close split and 3 delta mag, just steady and bright enough to see despite haze and full moon
STF2510 A-BC 8m.6 8m.7 9.0" 181° 2018 Aql 19h23m17.81s / +09°30'41.70"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Wide near equal white stars. BC is A 1179, 9.11/10.02, 0.3", and I didn't know it was there to look for, will need to go back. WDS says physical, but there is no parallax data for the B star
TDT1416 10m.5 11m.1 0.7" 298° 1991 Vul 19h23m28.49s / +22°34'19.70"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Exceptionally fine, split with seeing, very faint ~1 delta mag. B resolves at first diffraction, light orange stars
J2964 10m.2 10m.5 1.2" 293° 2016 Aql 19h23m56.47s / +15°06'44.10"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Very fine near equal white stars, nicely split about 1". WDS uncertain, but they are likely gravitational: 76% parallax range overlap, only 280 AU weighted separation, and hefty 1.44/1.35 solar mass
2 Sge HDS2753 Aa-Ab 6m.3 10m.3 0.4" 138° 2002 Sge 19h24m22.08s / +16°56'15.90"
STFA41 AB 6m.3 6m.9 342.3" 78° 2016
René Merting
Drachhausen (Germany)
12x50 AB: ein extrem weites Pärchen - B im Osten wirkt leicht gelblich, A ist reinweiß - Größenklassenunterschied maximal eine halbe Größenklasse - beide Sterne sind die hellsten im Sternumfeld, aber der weite Abstand vermindert den Doppelsterneindruck
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Aa-Ab: Component of STFA 41. Snowman at all powers through 1067x, but it should really separate if 0.4" as WDS says. Seeing is not up to the task, or the delta mag is too large
STF2515 AB 8m.4 10m.3 6.2" 141° 2015 Vul 19h24m33.33s / +21°30'57.30"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Blue-white A and ~2 delta light orange B, wide. Not physical
HO448 8m.5 10m.7 7.7" 2015 Vul 19h24m44.82s / +23°36'56.10"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Light yellow stars, ~3 delta mag, wide
WSI22 10m.3 10m.5 15.0" 272° 2015 Vul 19h24m53.90s / +21°26'29.10"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Near equal, wide. Not physical
HU339 9m.4 9m.5 0.9" 246° 2016 Sge 19h25m03.35s / +18°38'59.50"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Detected elongation 8" 333x, but needed 667x to get better a sighting, and 20" to get a wide open split even with indifferent seeing. White stars, about half delta mag. Aperture is king.
STF3111 9m.9 10m.2 2.5" 116° 2015 Vul 19h25m06.44s / +21°50'03.40"
Mark McCarthy
Fremont (California/USA)
508mm (205x) White stars, very slight magnitude difference, wide >2". Not physical
COU513 9m.2 9m.9 0.3" 2009 Vul 19h25m08.84s / +22°12'56.90"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Deeply notched overlapping disks -- I think it's hairline split at best moments -- slight mag difference
HJ2871, 4 Vul AB 5m.2 10m.0 13.5" 87° 2016 Vul 19h25m28.54s / +19°47'54.70"
AC 5m.2 11m.7 50.9" 212° 2016
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB: 4 Vul. Light orange and very faint star near, with another 2x fainter and farther away, noticed with AV only. (AB is first & AC second)
Mark McCarthy
Fremont (California/USA)
317mm (277x) AC: 4 Vul. Light orange and very faint star near, with another 2x fainter and farther away, noticed with AV only. (AB is first & AC second)
STF2518 AB 8m.2 10m.5 5.5" 352° 2015 Aql 19h25m48.30s / +14°36'31.10"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Yellow-white A and slightly red B, wide, 2 delta mag. WDS says physical, but there is no parallax range overlap
BOW7 10m.4 11m.0 9.6" 251° 2018 Sge 19h26m25.50s / +18°38'38.10"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Unremarkable wide pair, half delta mag.
BOW6 10m.8 12m.5 7.2" 309° 2015 Sge 19h26m32.98s / +18°37'14.10"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Nothing special, ~1 delta mag wide. Not physical. W.M. Bowyer
STF2525 AB 8m.2 8m.4 2.1" 289° 2018 Vul 19h26m33.71s / +27°19'21.90"

../images/binary-star-orbits/STF2525-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
152mm (100x) 2020-06-24: At 49x slightly elongated, at 69x just separated with visible difference in brightness. At 100x nice view with clear separation and slight difference in brightness, but no visible colors.
Mark McCarthy
Fremont (California/USA)
152mm (175x) Close near equal white stars. Physical with 289-year period
Mark McCarthy
Fremont (California/USA)
508mm (205x) Near equal yellow-white stars, wide. An amazingly precise 882.894 year period. I will not notice the change
STF2524 AB 9m.2 9m.5 5.4" 82° 2018 Vul 19h26m35.78s / +25°29'48.20"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Near equal white stars, wide. Not physical
STF2523 AB 8m.0 8m.1 6.3" 148° 2019 Vul 19h26m48.38s / +21°09'46.20"
Mark McCarthy
Fremont (California/USA)
152mm (175x) Equal white stars, well separated. WDS says physical, however they do not share the same parallax ranges, so they are not
Mark McCarthy
Fremont (California/USA)
203mm (205x) Near equal white, well separated. Near the Coat Hanger, which I viewed through the finder.
STF2520 AB 9m.7 10m.3 1.9" 234° 2018 Aql 19h26m48.65s / +12°52'04.40"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Nice slightly unequal white stars, about 2" separation
★★ A2786 10m.1 10m.1 0.4" 108° 2008 Vul 19h26m57.67s / +21°09'02.70"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Wow! Exceptionally fine but clean split, ~1 delta split, best without apodising mask, nearly perfect seeing. In the same FOV as STF 2523.
A1648 9m.7 9m.9 0.9" 182° 2016 Aql 19h27m01.49s / +16°05'56.90"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Nice close split, unequal, half delta mag, white. WDS uncertain, and there is just -1% parallax range overlap with 2% error, 314 AU weighted separation, 2.05/1.89 solar mass. Even with the slight out of bounds parallax, these might be gravitational
A159 AB 8m.5 10m.4 0.8" 336° 2017 Vul 19h27m20.85s / +20°40'08.00"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Super difficult. B appears just within A's diffraction ring, extremely faint, with seeing which is 7/10. Coalesces to a point at the correct PA, which I looked up during the observation to make sure I was looking at the correct quadrant of the star. Part of STF 2527 AC.
AG379 9m.6 10m.5 13.1" 84° 2015 Aql 19h27m22.68s / +13°59'18.40"
Mark McCarthy
Fremont (California/USA)
508mm (205x) 1 delta mag, wide. WDS says physical, but there is no parallax range overlap (-98%), so they are not
COU514 9m.8 9m.3 0.5" 88° 2007 Vul 19h27m33.15s / +20°09'17.30"
Mark McCarthy
Fremont (California/USA)
508mm (1067x) Subtle notched elongation, white stars, noticeable magnitude difference.
STF2534 8m.2 8m.4 6.9" 63° 2019 Cyg 19h27m40.63s / +36°31'44.40"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x zwei annähernd gleichhelle Sterne, ganz knapp getrennt - bei 64x passen 2-3 Blatt Papier mehr zwischen die beiden Sterne - Komponente A mit einem etwas kühleren weiß als B
Mark McCarthy
Fremont (California/USA)
152mm (175x) Very slight magnitude difference, blue-white, wide. WDS is uncertain, but there is -38% parallax overlap, so it is not
Mark McCarthy
Fremont (California/USA)
317mm (277x) Near equal white, 7-8"
STF2529 8m.6 10m.2 6.7" 298° 2018 Sge 19h28m04.99s / +17°38'54.00"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Dull yellow-white A and deeper orange yellow b, two delta, wide. Not physical
★★ STF3132 AB 10m.1 11m.8 8.0" 39° 2018 Vul 19h28m12.76s / +20°12'59.60"
Mark McCarthy
Fremont (California/USA)
178mm (205x) 2 delta B seen with averted vision only. There are two other faint stars, WAL 113 AC and AD. Forms a double-double with STF2530 in the same field. WDS says physical, and there is 21% parallax overlap, 1,441 AU weighted separation, and 1.40/1.06 solar mass. However the radial velocity delta (2.07) exceeds the escape velocity (1.74), so likely will not remain gravitationally bound
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal orange stars with hairline split April 2019
STF2519 8m.3 8m.5 12.0" 124° 2018 Aql 19h28m12.93s / -09°32'15.90"
René Merting
Drachhausen (Germany)
18x70 ein genauer Blick ist nötig, aber dann sind beide Komponenten schön voneinander getrennt zu erkennen - beide sind recht schwach und ohne Helligkeitsunterschied
René Merting
Drachhausen (Germany)
76mm (18x) bei 29x ein schön anzusehendes, ordentlich getrenntes Pärchen zweier gleich heller Sterne - 18x reichen ebenfalls noch für eine knappe Trennung
HU340 9m.8 10m.3 0.9" 120° 2016 Sge 19h28m21.65s / +18°29'04.40"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Very finely split even at 205x, noticeable magnitude difference, slightly orange stars
STF2530 9m.4 10m.7 5.6" 155° 2018 Vul 19h28m22.08s / +20°19'08.20"
Mark McCarthy
Fremont (California/USA)
178mm (205x) 1.5 delta mag, about 4" separation, white stars. In same field with STF2132. WDS uncertain, but there is 77% parallax range overlap, 577 AU weighted separation, solar mass 1.17/0.92, and the radial velocity delta is less than the escape velocity, so they are very likely gravitationally bound
STF2571 AB 7m.7 8m.3 11.2" 19° 2016 Dra 19h29m30.03s / +78°15'55.80"
Mark McCarthy
Fremont (California/USA)
152mm (175x) Wide, 1 delta mag white. WDS says physical, but they don't share parallax range overlap -6%
STF2531 AC 8m.1 10m.2 31.4" 28° 2015 Aql 19h29m30.07s / +03°05'23.60"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein auffälligeres Pärchen als der unmittelbar südöstlich stehende DS STF2532 - Komponente B ist auch schwach, aber A ist nur 1.5 Größenklassen heller - B steht gut abgesetzt nördlich von A
AG231 9m.9 10m.1 4.5" 239° 2018 Sge 19h29m34.45s / +17°59'46.90"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Near equal pair, white, wide. Physical
J137 9m.7 12m.0 4.5" 18° 2015 Sge 19h30m01.65s / +18°25'55.80"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Faint B ~5", ~2 delta. Not physical
STF2533 7m.4 10m.0 22.1" 212° 2015 Aql 19h30m04.70s / -00°26'41.80"
René Merting
Drachhausen (Germany)
18x70 Komponente B ist ganz schwach knapp abgesetzt südwestlich von A zu erkennen - die Sichtung gelingt nur mit viel Konzentration
STF2532 AB 6m.3 10m.5 33.0" 2011 Aql 19h30m10.53s / +02°54'14.70"
AC 6m.3 10m.9 119.4" 197° 2016
BC 10m.5 10m.9 151.3" 194° 2014
BD 10m.5 13m.1 33.6" 133° 2015
René Merting
Drachhausen (Germany)
100mm (32x) AB: bei 32x zeigt sich B gut abgesetzt nördlich von der schönen samtgelben A-Komponente - das Paar fällt nicht als Doppelstern auf, weil B zu schwach ist
★★★ beta Cyg, 6 Cyg, Albireo, STFA43 AB 3m.2 4m.7 35.2" 54° 2019 Cyg 19h30m43.29s / +27°57'34.90"
Robert Zebahl
Leipzig (Germany)
8x40 Well split, but I didn't recognised any color.
René Merting
Drachhausen (Germany)
10x50 Komponente A ist gleißend hell und stroh-gelb, Komponente B ist deutlich schwächer leicht abgesetzt von A erkennbar und strahlt eigenartig mint-grün
Christopher Hay
Seeheim (Germany)
12x36 Well split. A golden-red, B cold blue. Gorgeous!
Robert Zebahl
Leipzig (Germany)
16x70 2020-07-06: Bright orange & white-bluish.
Robert Zebahl
Leipzig (Germany)
80mm (25x) One of the most beautiful double stars in the northern hemisphere. Differences in brightness and color (orange-blue) are brilliant! Even under urban conditions with small aperture an enjoyment!
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x stehen beide Sterne weit getrennt - Komponente A mit einem satten zitronen-gelb, Komponente B mit einem leichten Stich ins Blaue
Jörg S. Schlimmer
Germany
127mm (203x) easy to split ../projects/double-stars/joerg-schlimmer/sketches/Zeichnung_Albireo_filtered_96dpi_127mm.jpg
Sarah Gebauer
Germany
150mm (116x) Erstbeobachtung August 2019: deutlicher Farbunterschied zwischen blau und sattem Gelb zu sehen
Jörg S. Schlimmer
Germany
305mm (170x) alle Komponenten einfach zu trennen ../projects/double-stars/joerg-schlimmer/sketches/Zeichnung_Albireo_filtered_96dpi_305mm.jpg
Werner E. Celnik
Rheinberg (Germany)
150mm ../projects/double-stars/werner-celnik/photographs/Albireo%202015-09-09%20Refr_150-1100%205DMkII%20ISO1600%20IDAS%20HDR_1s-2min%20kl.jpg ../projects/double-stars/werner-celnik/photographs/Albireo%202015-09-09%20Refr_150-1100%205DMkII%20ISO1600%20IDAS%20HDR_1s-2min%20cr%20kl.jpg
Werner E. Celnik
Rheinberg (Germany)
150mm ../projects/double-stars/werner-celnik/photographs/Albireo%20A9918-9920%20RGB%20A4%20mTxt%20kl.jpg
MCA55, bet 1 Cyg Aa-Ac 3m.4 5m.2 0.3" 53° 2019 Cyg 19h30m43.29s / +27°57'34.90"

../images/binary-star-orbits/MCA55-Aa-Ac-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (445x) Alberio A. Using all powers at both 20-inch and 7-inch, A is consistently out of round with the weaker end in the southern direction. Alberio B remains relatively round in the diffraction dance. Currently 0.365", it is widening to apastron by 2035 and might even be splitable by then
D20, V822 Aql AB 7m.2 9m.6 1.3" 65° 1991 Aql 19h31m15.78s / -02°06'36.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) A has a notched / trailing star in east PA, very close in and very much fainter. With seeing. Tough!
Mark McCarthy
Fremont (California/USA)
317mm (553x) tight airy disk of A, and a faint star widely separated, 3 delta mag ~25" Very near to a pretty orange carbon star.
STF2536 8m.4 11m.4 1.8" 120° 2018 Sge 19h31m37.80s / +17°46'58.60"

../images/binary-star-orbits/STF2536-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (205x) Blue-white A and much fainter ~3 delta B, split close, dull orange color. Very fine. Physical with 672.5 year period
HU945 AB 9m.8 10m.4 1.2" 24° 2015 Cyg 19h32m08.62s / +32°21'06.90"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Fine split, around half a mag delta, about 1" separation. WDS uncertain, but they do not share the same parallax range, not gravitationally bound.
BU650 AB 8m.2 11m.7 6.5" 146° 2015 Aql 19h32m13.13s / +06°30'11.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint B, wide separation.
HU946 8m.2 9m.9 8.7" 214° 2015 Cyg 19h32m22.44s / +34°17'02.60"
René Merting
Drachhausen (Germany)
100mm (32x) bei 64x begonnen, Komponente B ist knapp getrennt südwestlich von A sichtbar und deutlich schwächer als A - zurück auf 32x kann man in guten Momenten beide Sterne auch schon getrennt voneinander sehen, wenn man B zu sehen bekommt (B blitzt hin und wieder hervor)
Mark McCarthy
Fremont (California/USA)
508mm (205x) Easy light yellow A and bluish B, wide, 2 delta. Not physical
STF2540 AB 7m.5 9m.2 5.4" 145° 2018 Vul 19h33m17.05s / +20°24'50.50"
Mark McCarthy
Fremont (California/USA)
152mm (175x) White A and very light orange, 2 delta mag B, off of the Coat hanger asterism. WDS uncertain, however they do not share the same parallax range
Mark McCarthy
Fremont (California/USA)
178mm (205x) Pretty light yellow A and 2 delta reddish B, very nice. WDS uncertain, but they do not share parallax ranges
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and blue, pretty wide 1.5 delta mag.
ARY19 AB 8m.9 9m.4 48.5" 13° 2015 Vul 19h33m18.55s / +26°28'41.10"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Super-wide near equal. Why thought of as double? COU1028Aa-Ab is 0.3" 9.30/10.0, a good target for the 20-inch, and BD is COU1029, 7.4" 9.38/13.00. AB not physical per WDS
HU949 9m.8 9m.6 0.5" 87° 2016 Cyg 19h33m28.96s / +33°05'23.60"
Mark McCarthy
Fremont (California/USA)
508mm (667x) Hairline split at 533x, nice clean split at 667x, 1 delta mag. WDS uncertain, I don not find data for the B star in Gaia
HJ1414 9m.4 10m.8 14.3" 33° 2015 Cyg 19h33m32.75s / +36°10'14.10"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Very pretty yellow and blue stars, wide, 1 delta. Almost didn't look since it's a wide Herschel. Unfortunately it is not physical
BU653, 38 Aql AB 4m.6 13m.1 56.2" 289° 2008 Aql 19h34m05.35s / +07°22'44.20"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Orange star and very wide separated B. Other fainter stars nearby, likely part of the 5 other stars in the system
GCB43 9m.9 11m.9 7.5" 264° 2015 Sge 19h34m18.03s / +18°40'19.90"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Very faint pair, ~2 delta B is on the edge of direct vision, wide ~5", probably not physical. M. Giacobini
STT375 7m.7 8m.9 0.6" 189° 2017 Sge 19h34m37.45s / +18°07'41.20"

../images/binary-star-orbits/STT375-orbit.jpg

Mark McCarthy
Fremont (California/USA)
317mm (553x) Sense an elongation or rod, marginal.
Mark McCarthy
Fremont (California/USA)
508mm (533x) Snowman at 205x, 333x, split with 533x, >1 delta mag, ~0.5". A is orange-yellow and B is blue-white. Physical with 682 year period, just coming apastron now.
HO274 8m.3 11m.1 3.9" 71° 2001 Sge 19h34m55.37s / +16°27'04.10"
Mark McCarthy
Fremont (California/USA)
508mm (205x) White A, B is quite faint but resolved, ~4", delicate looking. Not physical
STT376 7m.6 10m.4 2.9" 237° 2017 Cyg 19h35m07.46s / +34°11'59.50"
Mark McCarthy
Fremont (California/USA)
508mm (205x) White A and 2 delta ruddy B, well separated. WDS uncertain; they do not share the same parallax range, so not gravitational
AG234 10m.0 10m.2 2.7" 320° 2018 Cyg 19h35m39.62s / +36°17'20.90"
Mark McCarthy
Fremont (California/USA)
508mm (205x) White near equal, nice split. Not physical
A2787 9m.9 11m.4 3.9" 111° 2018 Vul 19h35m47.31s / +23°33'50.10"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Seen right away, 1 delta mag and about 4". Nice stars. [not physical]
STF2543 6m.8 10m.4 11.5" 151° 2015 Aql 19h36m12.61s / +06°00'26.70"
Mark McCarthy
Fremont (California/USA)
152mm (175x) Light orange A and much fainter, wide B, just seen with direct vision. WDS uncertain but these do not share any parallax, so they are not
STT377 AB 9m.4 9m.4 0.9" 34° 2016 Cyg 19h36m17.16s / +35°39'34.40"
Mark McCarthy
Fremont (California/USA)
508mm (333x) White equal stars, elongated at 205x, cleanly split with 333x. WDS uncertain; unfortunately they do not share parallax ranges, so not gravitational
STF2548 8m.5 9m.8 9.4" 100° 2018 Vul 19h36m28.51s / +25°00'04.40"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Obvious pair, 1.5 delta mag ~10"
★★ A598 AB 9m.9 10m.2 1.0" 191° 2016 Cyg 19h36m29.82s / +41°24'08.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) UV Cyg. Orange-red with very much fainter blue ~1", 1 delta mag. Seeing must still. A a perfect round disk the color of the setting sun. Very special.
STF2541 8m.7 10m.1 5.4" 327° 2018 Aql 19h36m45.65s / -10°26'36.60"
René Merting
Drachhausen (Germany)
76mm (95x) A ist schon recht schwach, B ist noch schwächer und offenbart sich mir erst bei 95x, B steht nordwestlich von A und zeigt sich gut getrennt - schön ist trotzdem anders
HU342 9m.8 10m.4 4.6" 256° 2018 Sge 19h37m07.56s / +17°23'11.00"
Mark McCarthy
Fremont (California/USA)
178mm (205x) 1 delta mag, well separated white stars fairly faint. WDS says physical
epsilon Sge, 4 Sge, H6 26 AB 5m.8 8m.3 87.4" 82° 2017 Sge 19h37m17.38s / +16°27'46.00"
AC 5m.8 13m.2 100.7" 278° 2013
René Merting
Drachhausen (Germany)
12x50 AB: ein komfortabel getrenntes, gut sichtbares Pärchen - A im Westen ist weiß, B ist zwei Größenklassen schwächer und grauweiß
René Merting
Drachhausen (Germany)
100mm (20x) AB: bei 32x weit getrennt - Komponente A mit einem satten zitronengelb, B im Osten graubläulich - bei 20x ähnlicher Eindruck, bei B verliert sich der Farbeindruck
STF2551 AB 9m.7 10m.5 6.8" 42° 2018 Vul 19h37m23.23s / +22°48'51.00"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Half delta mag, about 7", may be part of triple with very wide 1 more magnitude fainter C about 60 degrees away from B.
BU144 9m.5 9m.6 6.0" 356° 2015 Cyg 19h37m47.09s / +30°21'18.60"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Clean star images, equal pair, wide, very pretty, in a dense field. Great view
STF2552 8m.5 9m.1 5.4" 194° 2018 Sge 19h37m55.00s / +19°21'32.20"
Mark McCarthy
Fremont (California/USA)
178mm (205x) 1 delta mag, well separated white stars. WDS says physical
HJ1428 AB 6m.6 10m.2 35.5" 232° 2015 Cyg 19h37m56.71s / +49°17'03.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Interesting string of 6 stars, with 7th at right angle from the central bright star in the string, which is orange.
MLB765 CD 10m.0 11m.5 6.5" 237° 2015 Cyg 19h38m08.56s / +29°12'40.50"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Nice one delta mag pair, wide, very pretty
BU249 AB 7m.4 9m.4 0.8" 109° 2008 Aql 19h38m21.68s / +00°20'43.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Some brightening in diffraction, but cannot claim success
BU1471 AB 7m.5 11m.9 12.5" 333° 2017 Sge 19h38m27.48s / +17°15'26.00"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very faint B, needed averted vision to notice it, can just hold it direct. Wide 10-12", 3 delta mag, orange A.
COU1162 Aa-Ab 9m.8 9m.9 0.8" 128° 2007 Cyg 19h38m37.18s / +29°52'53.40"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Fine snowman at 333x but needed 667x to split, very close pair. SLE 654 AB noticed as a very faint star about 15" out and a few degrees difference in PA
STF2545 AB 6m.8 8m.5 3.9" 325° 2016 Aql 19h38m43.36s / -10°09'23.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Easy, wide separation yellow and orange.
STF2547 AB 8m.1 9m.5 20.8" 330° 2015 Aql 19h38m56.50s / -10°20'20.60"
AC 8m.1 11m.1 49.6" 141° 2015
René Merting
Drachhausen (Germany)
18x70 AB: Komponente A ist schon schwach, B noch schwächer und steht relativ knapp abgesetzt nordwestlich von A - Helligkeitsunterschied schwer abschätzbar, vielleicht eine halbe Magnitude
René Merting
Drachhausen (Germany)
76mm (57x) AB: bei 29x ist B im NW von A leicht abgesetzt erkennbar, B ist auch bei 18x getrennt von A erkennbar und etwas mehr als eine Größenklasse schwächer
AC: erst bei 57x ist C ganz schwach südöstlich von A erkennbar - C ist nochmal deutlich schwächer als B und der Abstand AC dürfte etwas mehr als das Doppelte von AB sein
S722 AB 7m.2 7m.5 10.3" 236° 2016 Sgr 19h39m12.97s / -16°54'28.30"
René Merting
Drachhausen (Germany)
76mm (29x) bei 29x wunderschön, zwei gleich helle Sterne ganz dicht aneinander geschmiegt bzw. knapp getrennt - wenn ich mich entscheiden müsste, welcher Stern schwächer ist, dann vermutlich die südwestliche Komponente - zurück auf 18x erscheinen beide Komponenten wie eine 8 kurz vor der Trennung
SEI654 AB 9m.3 10m.7 14.8" 115° 2015 Cyg 19h39m20.06s / +31°52'19.50"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Wide one delta mag. pair
SLE659 AB 11m.0 12m.5 8.4" 107° 2015 Cyg 19h39m23.17s / +30°29'09.40"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Faint and wide pair, B star quite faint at edge of direct vision
★★★ HN 84, V340 Sge 6m.4 9m.5 28.4" 301° 2013 Sge 19h39m25.33s / +16°34'16.00"
René Merting
Drachhausen (Germany)
12x50 verdammt schwer - Komponente B ist ganz schwach nordwestlich von A auszumachen - beide Sterne berühren sich noch
René Merting
Drachhausen (Germany)
16x70 beide Sterne präsentieren sich gut getrennt, nicht zu weit aber auch nicht zu nah - Komponente A meint es gut mit der Farbe gelb, bei Komponente B kann ich keine Farbe erkennen
Christopher Hay
Seeheim (Germany)
80mm (30x) Primary ruddy red, secondary wide apart but too faint for any colour impression. Straw-yellow Epsilon Saggitae half a degree to the west with its ice-blue eastern companion enhances the experience of colour contrast in the FOV and is actually more attractive than HN 84 with this aperture and power.
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x sind beide Komponenten weit getrennt - Komponente A auffällig gelb-orange, B dagegen grau-blau, ein schöner Farbkontrast, der sich bei 32x verstärkt
Sarah Gebauer
Germany
150mm (85x) Holden 84, eine sehr goldgelbe Komponente und in 28'' Abstand die zweite, sehr schwache und weiße Komponente mit einem Hauch von Blau, sehr, sehr schön!
Christopher Hay
Seeheim (Germany)
150mm (96x) Main component ruddy tangerine orange, companion wide apart and ice blue. The longer I look the stronger the colour contrast becomes, which is by no means normal in many doubles. Epsilon Saggitae in same 0.8-degree field of view is straw-yellow with a cold blue companion (a field star?) pointing away from Epsilon in the direction of HN 84. I can’t think offhand of a better colour-contrast pair that can be framed in this manner in the same FOV.
Sarah Gebauer
Germany
150mm (160x) die hellere Hauptkomponente ist deutlich und stark goldfarben, die zweite dagegen sehr schwach, silbrig und dumpf ../projects/double-stars/sarah-gebauer/sketches/HN84.jpg
Mark McCarthy
Fremont (California/USA)
178mm (205x) Very pretty orange A and neon blue B, 1 delta mag, very wide
STF2557 AB 7m.5 10m.2 11.0" 103° 2015 Cyg 19h39m35.20s / +29°44'55.50"
Mark McCarthy
Fremont (California/USA)
203mm (333x) The closest to the 7th mag star, among a constellation of possible pairings visible in the field
BRT198 10m.2 11m.6 5.1" 154° 2015 Vul 19h40m06.65s / +25°15'33.70"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Nice picked out if field between two other stars, middle of a string. B can be seen direct but best with some indirect vision. 1.5 delta mag, wide sept about 3"
J776 AB 11m.1 11m.6 3.5" 47° 2015 Cyg 19h40m08.45s / +30°35'50.20"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Faint pair, one is about half a delta mag, the other flashes with averted vision and can hold direct once found. [not physical]
A272 AB 9m.8 10m.4 1.3" 193° 2009 Vul 19h40m09.48s / +26°11'23.40"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Wow, I get the split, very close but split, obvious difference in magnitude, about 1 delta mag. Less than 1" sep. Impressed i could get it [CD is 15th mag and 1"!]
A166 9m.2 9m.5 0.9" 241° 2016 Vul 19h40m10.51s / +23°30'43.10"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Close pair, 1/2 delta mag, elongates and splits with seeing. nice at this magnification.
A2788 9m.8 10m.9 1.3" 328° 2015 Vul 19h40m19.26s / +22°50'11.00"
Mark McCarthy
Fremont (California/USA)
203mm (533x) Elongated is the best I can get
STF2560 AB 6m.6 10m.5 14.2" 299° 2015 Vul 19h40m39.58s / +23°43'04.70"
Mark McCarthy
Fremont (California/USA)
178mm (205x) White A, B just barely seen with direct vision as a very small point, >3 delta mag, wide. WDS says not physical, and they do not share parallax ranges
54 Sgr, HJ599 AC 5m.4 7m.7 45.5" 41° 2019 Sgr 19h40m43.34s / -16°17'35.30"
René Merting
Drachhausen (Germany)
10x50 Komponente C sitzt nordöstlich von A, beide sind einfach zu trennen - großer Helligkeitsunterschied, schwer abschätzbar
René Merting
Drachhausen (Germany)
76mm (18x) bei 29x zeigen sich beide Komponenten in komfortablem Abstand zueinander - C ist gut 2 Größenklassen schwächer - bei 18x sind beide auch gut zu trennen, C hat immernoch ordentlich Abstand zu A - bei 57x habe ich mal nach den Farben geschaut, A stahlt warmweiß bzw. licht gelblich, C ist grau
BLL41, TT Cyg AB 7m.9 12m.3 70.3" 211° 2015 Cyg 19h40m57.00s / +32°37'05.70"
Mark McCarthy
Fremont (California/USA)
317mm (553x) B very wide, very faint from A. A is orange, B also a little orangish.
HO112 10m.2 10m.2 2.8" 259° 2018 Sge 19h41m29.50s / +18°38'03.20"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Very faint, almost ghostly, near equal, split, really nice. Not physical
★★ STFA46, 16 Cyg AB 6m.0 6m.2 39.5" 132° 2019 Cyg 19h41m49.09s / +50°31'31.60"
Christopher Hay
Seeheim (Germany)
3x63 Self-built binoculars, hence the unusual specification. Made of top-quality teleconverters, apochromatic and sharp to the edge.
With naked eye under good suburban sky 16 Cyg is just seen. In the 3x binoculars the double is split into two finest points of light in good moments despite the low magnification. A physical pair according to Stelledoppie.

Two-star rating awarded because this is a true physical pair that can be split with the smallest binoculars and reveals increasingly more with growing binocular size (brightness disctinction between A and B in 7x50, colour distinction in 15x45).
Christopher Hay
Seeheim (Germany)
7x50 Finely split, A-component appears very slightly brighter than B-component. A very pleasing binocular pair.
Christopher Hay
Seeheim (Germany)
15x45 Wide split, very strong visual presence dominating 4.5° FOV. A-component very pale orange, B-component equally pale blue.
Robert Zebahl
Leipzig (Germany)
16x70 2021-06-01: Very striking, bright at moderate separation and small difference in brightness. White-yellowish & white.
René Merting
Drachhausen (Germany)
18x70 zwei ordentlich getrennte fast gleich helle Sterne - beide Komponenten sind reinweiß und die hellsten Sterne im unmittelbaren Umfeld - auffällig
Mark McCarthy
Fremont (California/USA)
317mm (553x) 16 Cyg: Wide equal orange-yellow, also split in 80mm finder
KUI94 6m.5 7m.8 0.5" 158° 2014 Cyg 19h41m57.63s / +40°15'14.60"

../images/binary-star-orbits/KUI94-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) unsicher, 8förmig ../projects/double-stars/frederik-wanink/sketches/KUI94.jpg
Frederik Wanink
Itterbeck (Germany)
254mm ../projects/double-stars/frederik-wanink/photographs/KUI%2094.jpg
STF2563 AB 8m.7 9m.5 5.9" 286° 2019 Sge 19h42m28.87s / +17°25'38.90"
Mark McCarthy
Fremont (California/USA)
178mm (205x) White, 1 delta mag, well separated. WDS says physical
STT380, chi Aql AB 5m.4 6m.6 0.4" 76° 2009 Aql 19h42m34.01s / +11°49'35.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Diffraction a bit messy but I so see olive shaped "disk"
STF2562 AB 7m.0 8m.7 27.2" 251° 2019 Aql 19h42m45.86s / +08°22'57.50"
AC 7m.0 12m.1 82.0" 289° 2015
AD 7m.0 9m.9 117.2" 222° 2015
BC 8m.7 12m.1 62.7" 305° 2015
BD 8m.7 9m.9 94.6" 214° 2015
René Merting
Drachhausen (Germany)
100mm (20x) AB: bei 32x fällt das Paar sofort auf - Komponente A im Osten ist gut 2 Größenklassen heller als B - schöner Farbkontrast aufgrund des Helligkeitsunterschiedes, Komponente A strahlt weiß mit einem Stich ins orange, B ist grau - bei 20x ist die Trennung auch einfach
AD: bei 32x von A und B ausgehend ist das der nächste erkennbare Stern im Umfeld, er steht etwas weiter südwestlich und ist gut viermal soweit von A entfernt wie B - Komponente D wirkt noch gräulicher und transparenter als B - Komponente B dagegen wirkt schon wieder weiß im Vergleich zu D - bei 20x sind auch alle drei Sterne sichtbar
Mark McCarthy
Fremont (California/USA)
152mm (175x) AB: Easy wide light yellow A and 1 delta mag blue B. WDS says physical but no orbit yet. These are likely gravitationally bound: 48% parallax range overlap, 1,660 AU separation, and the radial velocity is less than the escape velocity
René Merting
Drachhausen (Germany)
320mm (45x) AB: bei 45x weit getrenntes Pärchen - Farbkontrast weiß-gelb/ orange
STTA188 & STU11 STTA188 AB 7m.7 8m.0 61.1" 121° 2017 Cyg 19h42m48.56s / +37°41'12.50"
STU11 AC 7m.7 8m.1 146.0" 228° 2013
STU11 AE 7m.7 11m.4 101.4" 196° 2015
STU11 AF 7m.7 12m.3 46.2" 191° 2015
STTA188 AG 7m.7 13m.5 29.8" 120° 2015
STU11 BD 8m.0 9m.6 60.4" 173° 2015
STTA188 BG 8m.0 13m.5 30.8" 302° 2015
René Merting
Drachhausen (Germany)
100mm (20x) STU11 (BD): bei 20x weit getrennt - Komponente D im Süden deutlich schwächer - viele weitere Sterne im unmittelbaren Umfeld
STT383 AB 7m.0 8m.3 0.8" 15° 2014 Cyg 19h42m56.26s / +40°43'18.30"

../images/binary-star-orbits/STT383-AB-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) getrennt ../projects/double-stars/frederik-wanink/sketches/STT383.jpg
Frederik Wanink
Itterbeck (Germany)
254mm ../projects/double-stars/frederik-wanink/photographs/STT%20383%20AB.jpg
STT384 AB 7m.6 8m.2 1.0" 196° 2018 Cyg 19h43m47.09s / +38°19'20.50"
AC 7m.6 9m.8 59.4" 297° 2015
AD 7m.6 10m.8 116.0" 294° 2015
René Merting
Drachhausen (Germany)
100mm (20x) AC: bei 20x weit getrenntes Pärchen - Komponente C ist deutlich schwächer als A
Frederik Wanink
Itterbeck (Germany)
254mm (640x) AB: deutliches Paar ../projects/double-stars/frederik-wanink/sketches/STT384.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB: Nice near equal ~1", rest of field angular with stars (AB seen, AC and AD in the field.)
Frederik Wanink
Itterbeck (Germany)
254mm AB ../projects/double-stars/frederik-wanink/photographs/STT%20384%20AB.jpg
★★ BU658, PS Vul 6m.7 7m.9 0.3" 284° 1998 Vul 19h43m55.97s / +27°08'07.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty orange star, subtly out of round / pear shaped. In a large cluster-like group of stars, around 3 degrees angular size, V-shaped, pretty in the finder. If the stars were brighter it would be as famous as the M45.
STF2567 AB 7m.9 10m.0 17.7" 310° 2015 Aql 19h44m06.10s / +12°22'21.10"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x braucht es für den schwachen Begleiter etwas Geduld, er ist dann aber gut abgesetzt erkennbar
BEW3 11m.8 12m.5 11.5" 302° 2015 Cyg 19h44m19.61s / +30°20'45.50"
Mark McCarthy
Fremont (California/USA)
508mm (205x) B is just on edge of detectability, very busy filed. Not physical. Bastian, U., Eisloeffel, J., & Wiese, K., a German amateur group. Not physical
DA13 AB 7m.4 11m.6 2.0" 274° 2018 Cyg 19h44m44.02s / +44°55'44.00"
Mark McCarthy
Fremont (California/USA)
508mm (445x) Very delicate light yellow-orange A and bluish B, very much fainter, <2", a nice fine point. Unfortunately they do not share parallax ranges, so not gravitational
STF2569 8m.4 9m.1 2.2" 357° 2019 Sge 19h44m47.81s / +16°48'55.10"
René Merting
Drachhausen (Germany)
100mm (142x) bei 107x ist mit etwas Geduld blickweise eine 8 erkennbar - bei 142x dann sehe ich in guten Momenten beide Komponenten ganz knapp getrennt - beide Sterne mit fast identischer Helligkeit, Komponente A im Süden ist nur ganz knapp heller - Grenzbeobachtung
Mark McCarthy
Fremont (California/USA)
203mm (333x) One delta mag, 2", blue-white stars
Winnecke 7, WNC7 10m.6 11m.2 95.1" 193° 2015 Cyg 19h44m48.15s / +50°31'30.30"
René Merting
Drachhausen (Germany)
18x70 der Zentralstern von NGC 6826 und zugleich Komponente A von WNC 7 ist relativ einfach sichtbar - Komponente B zeigt sich ganz schwach südwestlich von A mit deutlichem Abstand
WRH23, SU Cyg AE 7m.0 10m.5 24.8" 289° 2015 Cyg 19h44m48.74s / +29°15'52.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) SU Cyg: Orange in the finder, lighter in the scope. Wide separation, 3 delta mag.
AGC10 & STF2570 AGC10 AB 8m.4 8m.4 0.2" 140° 2000 Aql 19h44m56.78s / +10°46'30.60"
STF2570 AB-C 7m.6 9m.8 4.3" 277° 2016
René Merting
Drachhausen (Germany)
100mm (107x) STF2570 (AB-C): beide Komponenten erscheinen bei 107x knapp getrennt - der Begleiter ist nur ganz schwach sichtbar, wie ein Geist
Stefan Loibl
Rosenheim (Germany)
102mm (102x) STF2570 (AB-C): (AB) orange, C red-orange, faint pair, close to gamma Aql
Mark McCarthy
Fremont (California/USA)
152mm (175x) STF2570 (AB-C): Light orange A and blue B, nice separation, 2 delta mag. AB is AGC 10, 0.2" 8.43/8.42
Mark McCarthy
Fremont (California/USA)
152mm (175x) STF2570 (AB-C): 2 delta mag, light orange AB and blue B. AB is AGC 10, 0.2" 8.43/8.42 and would be a good target for the 20-inch
Mark McCarthy
Fremont (California/USA)
152mm (285x) STF2570 (AB-C): Easily split, white A and much fainter ruddy B. Did not see AB, which is near equal mag. 0.2", which I could get with the 20-inch on a good night.
René Merting
Drachhausen (Germany)
320mm (72x) STF2570 (AB-C): bei 72x knapp getrenntes Pärchen, Komponente AB im Osten weiß-gelblich, C deutlich schwächer
Mark McCarthy
Fremont (California/USA)
508mm (333x) AGC10 (AB): Wide split pair. I was trying for AB 0.2" which only suggested elongation, too marginal to claim success
Mark McCarthy
Fremont (California/USA)
508mm (410x) AGC10 (AB): I can sense olive shape, very tough.
Mark McCarthy
Fremont (California/USA)
508mm (410x) STF2570 (AB-C): White and off white wide separated pair, ~1 delta mag.
STF2579, delta Cyg, 18 Cyg AB 2m.9 6m.3 2.7" 215° 2017 Cyg 19h44m58.44s / +45°07'50.50"

../images/binary-star-orbits/STF2579-AB-orbit.jpg

Robert Zebahl
Leipzig (Germany)
70mm (200x) At 100x only indicated. At 200x the much fainter companion is visible as a slightly elongated brightening on the first diffraction ring.
Uwe Pilz
Leipzig (Germany)
105mm (288x) blauweiß ../projects/double-stars/uwe-pilz/sketches/190726DeltaCygni.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very bright white with ruddy B, ~4", 4 delta mag. Nice!
STF2577 AB 8m.4 9m.6 5.9" 262° 2018 Vul 19h45m12.27s / +20°54'50.30"
René Merting
Drachhausen (Germany)
100mm (64x) bei 32x sehe ich nur einen kupferfarbener Stern - bei 64x taucht westlich von ihm ein schwacher Begleiter auf, beide sind gut getrennt - Komponente B passt farblich gut zu Komponente A, auch wenn ich nicht wirklich beschreiben kann, welchen Farbstich ich da sehe
Mark McCarthy
Fremont (California/USA)
203mm (333x) Wide, one and half delta mag, light orange and blue stars
STF2578 AB 6m.4 7m.0 14.9" 125° 2019 Cyg 19h45m39.65s / +36°05'27.60"
Robert Zebahl
Leipzig (Germany)
70mm (22x) At 22x easy with visible brightness and color difference. The slight color difference is even better visible at 44x: A appears white-yellowish, B slightly bluish.
René Merting
Drachhausen (Germany)
100mm (32x) bei 20x knapp getrennt, bei 32x ein ordentlich getrenntes Pärchen - Komponente B im SO ist nur leicht schwächer und mit leichtem Farbkontrast, aber dieser ist nicht greifbar
STT385 7m.8 9m.6 1.2" 51° 2016 Cyg 19h45m48.77s / +40°33'18.90"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow disk with fine blue point, with seeing, 1-1.5"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Bright white A and 2 delta mag B just separated at low power. This one is likely gravitational, 94% parallax overlap, 757 AU weighted separation, high stellar mass 4.01/2.67
H5 137 AB 6m.2 8m.2 38.8" 25° 2019 Cyg 19h45m51.35s / +35°00'45.90"
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x weit getrenntes Pärchen - bei 32x Komponente A gelblich, B ohne Färbung
A601 AB 10m.4 11m.4 1.2" 156° 2010 Cyg 19h45m57.37s / +41°44'56.70"
Mark McCarthy
Fremont (California/USA)
508mm (205x) 1 delta mag well split white stars. Not physical, no parallax overlap
17 Cyg STF2580 AB 5m.1 9m.2 26.1" 68° 2015 Cyg 19h46m25.60s / +33°43'39.30"
STF2580 AC 5m.1 9m.4 107.9" 126° 2013
WNO56 AF 5m.1 8m.5 792.0" 235° 2002
STF2580 BG 9m.2 8m.6 817.6" 236° 2010
STF2576 FG 8m.5 8m.6 13.2" 155° 2019

../images/binary-star-orbits/STF2580-AB-orbit.jpg ../images/binary-star-orbits/STF2576-FG-orbit.jpg

René Merting
Drachhausen (Germany)
100mm (20x) AB: bei 20x locker getrennt - Komponente A satt gelb, B wegen des großen Helligkeitsunterschiedes gräulich-bräunlich
Robert Zebahl
Leipzig (Germany)
152mm (92x) 2021-07-24: At 30x the components A, B & C are easily visible, whereby A & B are still quite close together. The bright component A appears in a pale yellow. At 92x also the pair FG is separated easily and looks less belonging to the system because of the wide separation to the other components. All in all it is worth observing. ../projects/double-stars/robert-zebahl/sketches/2021-07-24_17-cyg.jpg
Winfried Kräling
Marburg (Germany)
152mm (175x) A, B & C ../projects/double-stars/winfried-kraeling/sketches/2021-07-23-2020UT-17%20Cygni.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB: 17 Cyg: Yellow and slightly red, well separated, 1 delta mag. (This is an amazingly complex system with 11 stars in all sorts of combinations. Why not just call it an open cluster?)
OL72 10m.5 10m.6 7.1" 2016 Sge 19h46m42.32s / +18°38'49.70"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Faint, well split, slight magnitude difference. Not physical
HU345 9m.0 10m.0 3.8" 104° 2018 Sge 19h46m45.89s / +17°33'09.00"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Light yellow-orange stars, 1 delta mag, well split, nice! WDS says physical
AG391 7m.7 9m.2 52.3" 297° 2015 Aql 19h47m56.98s / +10°02'23.40"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x easy, ein weit auseinander stehendes Paar - Komponente A im Südosten ist zartgelb, B im Nordwesten wirkt kupfergrau - auffallend im Umfeld
HDS2814 8m.5 10m.6 18.3" 139° 2016 Sgr 19h48m01.78s / -14°34'02.70"
René Merting
Drachhausen (Germany)
320mm (45x) bei 45x ein schickes Sternpaar - gut getrennt und doch eng zusammen stehend - B im Süden ist sehr schwach, bestimmt 2-2.5 Größenklassen schwächer - A strahlt reinweiß, B wirkt grau
STT386 8m.5 8m.6 1.0" 71° 2018 Cyg 19h48m16.51s / +37°09'37.50"
Robert Zebahl
Leipzig (Germany)
152mm (270x) Clearly visible as a double star with touching diffraction disks. Not difficult.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) trotz schwacher Komp. gut zu sehen ../projects/double-stars/frederik-wanink/sketches/STT386.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Tight near equal, nice, split with seeing, ~1"
DOO11 10m.0 10m.9 2.8" 281° 2015 Vul 19h48m21.40s / +24°52'56.80"
Mark McCarthy
Fremont (California/USA)
203mm (533x) Pretty pair of blue stars, one delta mag, 3" sep. Very nice! [not physical]
STF2584 9m.1 9m.2 2.0" 294° 2016 Vul 19h48m22.40s / +22°11'56.50"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal, well split 2"
STF2586 AB 7m.6 9m.3 3.3" 227° 2018 Vul 19h48m34.30s / +24°57'43.90"
Mark McCarthy
Fremont (California/USA)
203mm (533x) White and light blue, wide ~5", 1.5 delta mag
★★ STF2583, pi Aql AB 6m.3 6m.8 1.4" 105° 2019 Aql 19h48m42.05s / +11°48'57.30"
Stefan Loibl
Rosenheim (Germany)
102mm (205x) not fully split, seen as constricted '8'
Robert Zebahl
Leipzig (Germany)
120mm (337x) At 100x elongated, at 200x seen as '8'. At 337x split in moments of good seeing, but still very tight. Overall the seeing was not so good.
Sarah Gebauer
Germany
150mm (160x) wieder ganz haarscharf getrennt, bildet ein großes, nettes Dreieck mit Feldsternen, gefällt mir wieder sehr gut! ../projects/double-stars/sarah-gebauer/sketches/20200731%20Pi%20Aql%20DSk.jpg
Sarah Gebauer
Germany
150mm (170x) bei 170x ganz, ganz knapp getrennt, ein haarfeiner, schwarzer Trennstrich ist zu sehen, eine geniale Grenzbeobachtung!
Mark McCarthy
Fremont (California/USA)
152mm (285x) Pi Aql. Very pretty near equal light blue stars, cleanly separated
Mark McCarthy
Fremont (California/USA)
203mm (205x) Pi Aql. Pretty yellow-orange A and a little more than 1 delta mag pale blue B, ~1", yet neatly separated
Frederik Wanink
Itterbeck (Germany)
254mm (640x) Helligkeitsunterschied erkennbar ../projects/double-stars/frederik-wanink/sketches/STF2583.jpg
KU123 9m.4 11m.0 21.6" 298° 2015 Vul 19h48m42.71s / +25°48'28.40"
Mark McCarthy
Fremont (California/USA)
203mm (533x) Wide pair, one delta mag, bluish color [not physical]
STT387 7m.1 7m.9 0.4" 105° 2018 Cyg 19h48m43.81s / +35°18'41.30"

../images/binary-star-orbits/STT387-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) zeitweise als 8 zu sehen ../projects/double-stars/frederik-wanink/sketches/STT387.jpg
Mark McCarthy
Fremont (California/USA)
317mm (277x) Red, very close pair? Seeing not supporting higher magnification. Marginal.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Overlapping disks, to a nearly hairline split with seeing. Half delta mag.
Frederik Wanink
Itterbeck (Germany)
254mm ../projects/double-stars/frederik-wanink/photographs/STT%20387.jpg
zeta Sge, 8 Sge AGC11 AB 5m.6 6m.0 0.2" 182° 2007 Sge 19h48m58.65s / +19°08'31.10"
STF2585 AB-C 5m.0 9m.0 8.3" 311° 2016
STF2585 AB-D 5m.0 11m.0 76.0" 246° 2005
René Merting
Drachhausen (Germany)
100mm (64x) AB-C: bei 32x noch nichts erkennbar, bei 64x ploppt nordwestlich von Komponente AB ein ganz schwacher Begleiter (Komponente C) auf - gut getrennt die beiden
Christopher Hay
Seeheim (Germany)
150mm (96x) AB-C: Secondary nicely set off as a fine pinprick beside the much brighter primary. Secondary seems ice blue at first sight, but that impression fades the longer I look. Primary essentially colourless. Secondary not seen in 3-inch at 30x. Physical double according to Stelledoppie.
Christopher Hay
Seeheim (Germany)
150mm (300x) AB: Used a moment of unusually good seeing in July 2019 to find out whether anything can be done with the 6-inch on this super-tight pair. No prior PA knowledge. At 200x nothing happening. At 240x a northwest-southeast elongation. At 300x distinctly stretched. According to Stelledoppie a physical pair with a very short period of 23 years. Distance a little over 0.2“ from 2010 to 2020, shrinking to 0.03“ in 2026, reaching 0.2“ again around 2040. This is one of very few double stars whose complete orbit can be observed several times over in a human lifetime, be it only as a periodical elongation/contraction. The observability of the elongation in just 6 inches of aperture is aided greatly by the almost equal brightnesses of the components.
Mark McCarthy
Fremont (California/USA)
203mm (667x) AB-C: White and blue stars, wide three to four delta mag, clean image with 8" [Did not notice elongation is AB, 6.04 and 0.2"]
Mark McCarthy
Fremont (California/USA)
317mm (553x) AB-C: Bright A and 3x fainter wide B. Did not see AB 0.2"
STF2588 A-BC 7m.7 8m.1 9.6" 159° 2019 Cyg 19h49m00.90s / +44°22'45.10"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x ein schönes enges Paar nicht mehr ganz knapp getrennt - Komponente B ist nur gering schwächer - beide Sterne strahlen weiß um die Wette - zurück auf 20x ist eine 8 zu sehen
Mark McCarthy
Fremont (California/USA)
317mm (553x) Near equal white, pretty wide separation.
HJ603, 19 Cyg AB 5m.4 10m.5 56.8" 115° 2015 Cyg 19h50m33.99s / +38°43'20.70"
AC 5m.4 12m.6 96.6" 318° 2015
AD 5m.4 11m.9 163.8" 309° 2014
BE 10m.5 13m.5 20.8" 10° 2015
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x fällt A sofort als zartgelber Stern auf, B steht gut abgesetzt im SO, sehr schwach sichtbar - bei 64x wird A sattgelb, B ist grau und farblos
HO275, 51 Aql 5m.4 13m.6 26.4" 121° 2015 Aql 19h50m46.80s / -10°45'48.90"
Mark McCarthy
Fremont (California/USA)
508mm (410x) Seeing poor, A appeared as a fuzz ball, but could see a much fainter fuzz ball B start in A's haze ~20" separated to east.
alpha Aql, 53 Aql, Atair, Altair STFB10 AB 0m.9 9m.8 195.8" 286° 2015 Aql 19h50m46.99s / +08°52'05.90"
STFB10 AC 0m.9 10m.3 186.4" 110° 2015
DAL27 AD 0m.9 11m.9 26.8" 105° 2015
SMR5 AE 0m.9 11m.0 151.3" 354° 2015
SMR5 AF 0m.9 10m.3 292.4" 48° 2015
GMC5 AG 0m.9 13m.0 185.1" 121° 2012
René Merting
Drachhausen (Germany)
100mm (32x) AB: bei 32x ist Komponente B sehr schwach westlich vom buttergelbem Stern Altair erkennbar, weit abgesetzt
AC: bei 32x ist C im Osten ebenfalls schwach sichtbar, gleicher Abstand wie AB - alle drei Sterne stehen schön auf einer Linie, aber DS-Feeling eher Fehlanzeige
STF2587 6m.7 9m.4 5.0" 99° 2014 Aql 19h51m26.83s / +04°05'19.10"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Bright orange A star and faint bluish grey B which appears when seeing stills a fine point, ~4.5" [not physical]
ES357 AB 7m.1 12m.4 10.1" 309° 2011 Cyg 19h51m41.33s / +31°08'16.10"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Moderately bright, 8th mag, with 3 delta mag B well separated.
STF2590 AB 6m.5 10m.3 13.6" 308° 2017 Aql 19h52m15.58s / +10°21'05.80"
Mark McCarthy
Fremont (California/USA)
152mm (175x) Fairly bright ice-blue A and very faint reddish B, just seen direct, wide. WDS uncertain, there is 19% parallax overlap, 6,246 AU weighted separation, and pretty high stellar mass 4.67/1.80, so might be gravitationally bound
A1660 AB-C 10m.2 10m.3 0.7" 203° 2018 Aql 19h52m53.17s / +14°25'07.70"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Too tough for this night. Suspect with 205x, @ 333x I have strong sense of elongation but its all a haze, seeing not allow higher magnification. [AB is 0.2"! Very much worth trying with the 20" HD 354044
STF2593 AB 8m.8 10m.3 12.1" 244° 2019 Aql 19h53m16.93s / +11°50'04.30"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Almost a delicate pair, >1 delta mag, wide, both light orange. I missed BC, 10.1/11.4 3.7" -- transparency not good enough for fainter stars
AG241 10m.4 10m.6 8.6" 217° 2017 Aql 19h53m19.36s / +08°20'24.70"
Mark McCarthy
Fremont (California/USA)
203mm (205x) Faint pair, one delta, wide. Not physical
STFA48 AB 7m.1 7m.3 41.7" 147° 2019 Vul 19h53m22.65s / +20°20'14.10"
René Merting
Drachhausen (Germany)
16x70 beide etwa gleich helle Sterne sind gut getrennt, kein Farbunterschied, unspektakulär
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x zwei Sterne mit ordentlich Luft dazwischen - Komponente B südlich knapp schwächer - leichter Farbunterschied, aber nicht wirklich definierbar
DJU4, 13 Vul 4m.6 7m.4 1.4" 246° 2016 Vul 19h53m27.69s / +24°04'46.60"

../images/binary-star-orbits/DJU4-orbit.jpg

Mark McCarthy
Fremont (California/USA)
152mm (285x) Gorgeous! Bright A and 3 delta mag B appears as a fine point just beyond A's diffraction. Seen at 175x, best at 285x. Physical with a 615-year period, at apastron
Frederik Wanink
Itterbeck (Germany)
254mm (640x) schwierig wegen Helligkeitsunterschied ../projects/double-stars/frederik-wanink/sketches/13Vul.jpg
STF2599 7m.5 9m.9 3.8" 52° 2016 Vul 19h53m38.65s / +22°59'20.30"
René Merting
Drachhausen (Germany)
100mm (107x) bei 64x ist nordöstlich vom Hauptstern eine kleine Andeutung erkennbar, ganz schwach und noch nicht getrennt - bei 107x sehe ich den schwachen Begleiter besser, aber zwischen beide Sterne scheint kein Blatt zu passen - nur in guten Momenten sind beide Sterne knapp getrennt zu bewundern
STF2596 7m.3 8m.7 2.1" 297° 2016 Aql 19h54m01.95s / +15°17'31.70"

../images/binary-star-orbits/STF2596-orbit.jpg

René Merting
Drachhausen (Germany)
100mm (107x) bei 107x ist Komponente B knapp abgesetzt nordwestlich von der A-Komponente sichtbar, knappe Trennung - Helligkeitsunterschied gut 1.5 Größenklassen
Mark McCarthy
Fremont (California/USA)
152mm (175x) Light yellow A and light blue B, nicely separated, very pretty. Physical with a 2971-year period
Mark McCarthy
Fremont (California/USA)
203mm (533x) Orange pair with 2 delta mag companion, about 2", well split.
STF2594, 57 Aql AB 5m.7 6m.3 36.3" 171° 2019 Aql 19h54m37.65s / -08°13'38.30"
René Merting
Drachhausen (Germany)
10x50 ein einfacher Doppelstern - schön getrennt - Komponente A strahlt etwas weißer (ich weiß, es gibt keine Steigerungsformen von Farben)
René Merting
Drachhausen (Germany)
16x70 ein ansehnliches gut getrenntes Sternpaar - Komponente B im Süden ist gut eine halbe Größenklasse schwächer - das Weiß von Komponente A wirkt etwas kühler, während B eher in einem wärmeren zarten creme-gelb strahlt
René Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein sehr auffälliges, komfortabel getrenntes Sternpaar - Komponente B im Süden ist eine halbe Magnitude schwächer - zurück auf 20x immernoch eine ordentliche Trennung, B wirkt jetzt etwas schmutziger weiß
Uwe Pilz
Leipzig (Germany)
105mm (22x) orange-blau
Uwe Pilz
Leipzig (Germany)
320mm (36x) ../projects/double-stars/uwe-pilz/sketches/211001_57AQL.jpg
Berthold Fuchs
Wiesbaden (Germany)
130mm easy DS ../projects/double-stars/berthold-fuchs/photographs/57%20Aquliae.png
HO581 8m.0 8m.7 0.3" 133° 2006 Cyg 19h54m58.40s / +41°52'17.60"

../images/binary-star-orbits/HO581-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (667x) Very subtly notched elongation at best, light orange stars. 25.63 year period, near apastron in a nearly circular orbit, it will widen slightly in the next 5 years and still be a detectable 0.2" in 2035.
STT390 AB 6m.6 9m.5 9.6" 22° 2015 Cyg 19h55m06.50s / +30°11'41.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very wide, 2-3 delta mag.
STT532, bet Aql AB 3m.8 11m.4 13.4" 2015 Aql 19h55m18.79s / +06°24'24.30"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Alshain, the Falcon. Light yellow-orange bright B, B easily seen, wide separation. WDS uncertain, however there is no overlap in parallax range, so not physical
STF2605, psi Cyg, 24 Cyg AB 5m.0 7m.5 2.9" 175° 2017 Cyg 19h55m37.82s / +52°26'20.50"
Robert Zebahl
Leipzig (Germany)
70mm (100x) At 80x difficult. At 100x and 133x the fainter component was clearly visible as small, roundish, partly slightly oval brightening.
René Merting
Drachhausen (Germany)
100mm (107x) bei 107x knapp getrennt, A strahlt weiß mit einer schwachen Andeutung von gelb, B im Süden ist deutlich schwächer
Uwe Pilz
Leipzig (Germany)
105mm (96x) nicht schwierig ../projects/double-stars/uwe-pilz/sketches/psiCyg.jpg
Uwe Pilz
Leipzig (Germany)
105mm (144x) ../projects/double-stars/uwe-pilz/sketches/211024PsiCyg.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Yellow and ruddy, fairly wide, ~4" 2 delta mag.
BU980, eta Cyg AB 3m.9 12m.0 7.2" 206° 2017 Cyg 19h56m18.40s / +35°05'00.60"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Somewhat in glare of A but saw B momentarily with averted vision. Two more faint stars on either side, B closer in. Complicated system, AB AE CE CF. What happened to D?
BLL43 8m.6 12m.1 58.4" 16° 2015 Cyg 19h57m12.51s / +44°15'40.20"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Intense orange color star, very pretty to look at. Orange in the finder. But no pair noticed -- too faint for urban location
BU425 AB 9m.2 9m.2 1.4" 240° 2016 Sge 19h57m32.28s / +20°17'40.10"
Mark McCarthy
Fremont (California/USA)
203mm (667x) Very fine pair, half delta mag, well split a little over 1". [AC & AD wider and fainter, not seen.]
A1663 AB 8m.9 9m.2 1.3" 237° 2016 Aql 19h57m34.28s / +15°24'21.50"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Clean split, equal, can see disks with seeing.
STT393 8m.3 9m.0 16.5" 232° 2015 Cyg 19h57m52.55s / +44°23'03.10"
René Merting
Drachhausen (Germany)
18x70 B steht sehr knapp getrennt südwestlich von A, man muss schon sehr genau hinschauen - Helligkeitsunterschied eine Größenklasse
René Merting
Drachhausen (Germany)
100mm (20x) bei 32x gut getrennt - Komponente A ist weiß-gelb und doppelt so hell wie Komponente B, die weiß-blau dagegen hält - runter auf 20x können beide Sterne auch getrennt werden, sie stehen dann schön eng
BU1475 & HDO155 BU1475 AB 7m.8 9m.5 10.4" 113° 2015 Aql 19h57m53.70s / -09°03'30.30"
HDO155 AC 7m.8 8m.7 115.1" 119° 2015
BU1475 CD 8m.7 11m.1 4.9" 163° 2015
René Merting
Drachhausen (Germany)
15x56 HDO155 (AC): ein weit auseinander stehendes Pärchen - Komponente B im Südosten ist halb so hell wie A
René Merting
Drachhausen (Germany)
76mm (29x) BU1475 (AB): bereits bei 29x ist B knapp abgesetzt südöstlich von A erkennbar - A ist schön weiß und B ist im Grunde so schwach (gut 1.5 mag schwächer), dass der Stern kupferbraun strahlt
Uwe Pilz
Leipzig (Germany)
320mm (121x) ../projects/double-stars/uwe-pilz/sketches/211001_BU1475.jpg
STT392 & STF2607 STT392 AB 6m.6 8m.4 0.1" 184° 1996 Cyg 19h57m56.12s / +42°15'38.90"
STF2607 AB-C 6m.6 9m.1 3.0" 289° 2012

../images/binary-star-orbits/STT392-AB-orbit.jpg

René Merting
Drachhausen (Germany)
100mm (107x) STF2607 (AB-C): bei 107x ist C knapp westlich von AB zu erkennen, in guten Momenten sind die Komponenten getrennt sichtbar - trotz des großen Helligkeitsunterschiedes von schätzungsweise 1,5 bis 2 Größenklassen wirkt C ggü. AB auch erstaunlich weißlich
Mark McCarthy
Fremont (California/USA)
152mm (175x) STF2607 (AB-C): Pretty light yellow-white A and reddish B, 2 delta mag, around 4". Nice. AB is STT 392 6.60/8.40 0.1", not seen (and only 0.2" at discovery in 1843; physical with a 270-year period). AB-C is uncertain in WDS, but I find the stars do not share parallax ranges, -10%
Mark McCarthy
Fremont (California/USA)
317mm (553x) STF2607 (AB-C): Very close clean split though B is in A's diffraction, somewhat bluish.
BU266 7m.6 11m.5 15.8" 166° 2015 Aql 19h57m56.15s / +11°24'53.00"
Mark McCarthy
Fremont (California/USA)
152mm (175x) B seen with averted vision only, wide. What's cool is that not jus the B star is revealed with averted vision, but the whole field sparkles with more stars with AV! WDS says physical and there is 17% parallax overlap, 2,874 AU weighted separation, and stellar mass 2.29/0.96, so may be gravitationally bound
BU149 BC 10m.3 12m.9 8.1" 202° 2015 Sge 19h58m05.54s / +16°29'55.20"
Mark McCarthy
Fremont (California/USA)
508mm (205x) B seen easily, C is noticed with averted vision and then can direct. Not physical
AC12 7m.5 8m.3 1.6" 298° 2016 Aql 19h58m22.77s / -02°13'54.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very nice light yellow-orange and blue-white stars, 1", 1 delta mag.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Well split, about 1 magnitude difference.
★★ STF2606 AB 7m.7 8m.4 0.7" 146° 2017 Cyg 19h58m32.66s / +33°16'38.80"

../images/binary-star-orbits/STF2606-AB-orbit.jpg

Frederik Wanink
Itterbeck (Germany)
254mm (640x) sehr schwierig, Luftunruhe ../projects/double-stars/frederik-wanink/sketches/STF2606.jpg
Mark McCarthy
Fremont (California/USA)
317mm (553x) Hair split to clean split when seeing stills and there is only an airy disk. Near equal, half a delta mag. ~0.8"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Close pair 2 delta mag.
STF2609 6m.7 7m.6 1.9" 22° 2019 Cyg 19h58m34.37s / +38°06'20.80"
Mark McCarthy
Fremont (California/USA)
152mm (175x) Wide 1 delta mag. WDS is uncertain, 3% parallax range overlap, 660 AU weighted separation, 3.81/3.01 stellar mass -- maybe
Mark McCarthy
Fremont (California/USA)
152mm (175x) Beautiful ice-blue A and yellow B, 1 delta mag, about 3" separation. Spectral class B5IV (blue-white). 3% parallax range overlap, 660 AU weighted separation, 3.81/3.01 solar mass, so maybe gravitational
Mark McCarthy
Fremont (California/USA)
508mm (333x) Cleanly split
STF2611 8m.5 8m.5 5.3" 208° 2018 Cyg 19h58m51.90s / +47°21'48.20"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x sind beide Sterne dicht zusammen stehend erkennbar, nur in ruhigen Momenten gelingt die Trennung - bei 64x ist die Trennung dann eindeutig, beide Sterne sind gleich hell und weiß
Mark McCarthy
Fremont (California/USA)
317mm (553x) Equal yellow, wide.
STF2610 AB 8m.8 9m.2 4.3" 296° 2019 Cyg 19h59m07.47s / +35°32'10.10"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Wide, white, near equal. Not physical
A378 8m.5 9m.0 1.0" 294° 2016 Cyg 19h59m22.02s / +32°06'28.00"

../images/binary-star-orbits/A378-orbit.jpg

Mark McCarthy
Fremont (California/USA)
508mm (205x) Excellent near equal split, light orange stars. Spectral class G5 (yellow). WDS 591-year period, and it appears to be starting to make a rapid closure to periastron by 2060. There is 37% parallax range overlap, 139 AU weighted separation, and 1.84/1.56 solar mass
BU1133 6m.7 9m.9 1.1" 342° 1991 Cyg 19h59m39.13s / +31°49'35.40"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Tough find, dense field. Very temporary brightening in diffraction, 20% held. This is a tough one, <1" and large delta mag.
Mark McCarthy
Fremont (California/USA)
508mm (445x) B glimpsed with seeing at 445x, a solid point in some flaring from A. Suspected at 333x. WDS says physical, and unfortunately there is no parallax data on the companion. Burnham discovered on the Lick 36-inch at 0.9"
A379 7m.6 11m.1 2.6" 227° 1991 Cyg 19h59m41.80s / +30°54'50.20"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Very nice, White A holding a steady disk, and faint B is nicely separated, <3", around 4 delta mag. WDS says not physical, and there is no parallax data on the companion
HJ1462 7m.5 9m.9 37.2" 24° 2015 Vul 20h00m06.57s / +25°57'00.00"
René Merting
Drachhausen (Germany)
76mm (29x) bei 29x zeigt sich die A-Komponente auffällig warmweißgelblich strahlend, B präsentiert sich in gutem Abstand und deutlich schwächer (mind. 2 Größenklassen) - ein schöner Farbkontrast zwischen beiden Sternen
13 Sge H4 100 AB 10m.0 10m.1 23.9" 265° 2013 Sge 20h00m10.43s / +17°30'09.10"
H4 100 AC 10m.0 5m.6 112.6" 297° 2013
BU1477 CD 5m.6 13m.4 27.0" 208° 2013
BU1477 CE 5m.6 13m.0 43.0" 115° 2001
John Raymond
Richmond (Virginia/USA)
../projects/double-stars/john-raymond/photographs/13_sge.jpg
STT394 AB 7m.1 10m.3 11.0" 294° 2015 Cyg 20h00m11.43s / +36°24'50.80"
Mark McCarthy
Fremont (California/USA)
152mm (175x) Light orange A and a faint wide companion. WDS calls it physical, no data for B in Gaia
Mark McCarthy
Fremont (California/USA)
152mm (245x) White star among several fainter stars, none which strike one as being the pair. WDS is calling it physical, and they might be right: 28% parallax range overlap, 2,011 AU weighted separation, 2.77/1.22 solar mass
Mark McCarthy
Fremont (California/USA)
317mm (553x) Pretty orange and blue, well separated, 2 delta mag.
Mark McCarthy
Fremont (California/USA)
508mm (205x) Wide, 3 delta mag light yellow A and blue B, pretty. WDS says physical, and there is 28% overlap in their parallax ranges, 2,011 AU weighted separation, 2.77/1.22 Msun, so possible it is gravitational
BU1258 7m.5 10m.9 1.4" 143° 2015 Cyg 20h00m15.54s / +29°55'14.30"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Very fine, 3 delta mag, 2" separation, white A and dull yellow B. WDS uncertain, and there is no parallax data for the companion. Burnham discovered on the Lick 36-inch at 1.5" while attempting to measure BU 439
A719 9m.9 10m.4 3.0" 109° 2018 Cyg 20h00m16.61s / +46°20'19.00"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Well split, noticeably unequal stars, A is light orange. WDS uncertain, however there is no overlap in their parallax ranges, -34%
BU439 AB 7m.9 12m.7 3.3" 222° 2015 Cyg 20h00m46.25s / +29°49'19.40"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Not easy, I can just see B with direct vision, very faint and rather closely split to light yellow A. WDS uncertain, and unfortunately there is no parallax range overlap, -52%. Burnham discovered with the Dearborn 18.5-inch
L32 10m.8 11m.0 3.3" 129° 2018 Cyg 20h00m59.11s / +29°55'30.90"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Near equal, well split, seems double... rich field with many other wide type pairs. WDS says not physical, and there is no overlap (-64%) of the parallax ranges
BU1289 AB 8m.2 9m.2 0.7" 55° 2016 Cyg 20h00m59.61s / +37°41'56.10"
AC 8m.2 9m.7 21.5" 90° 2018
René Merting
Drachhausen (Germany)
100mm (32x) AC: bei 32x sind zwei Sterne weit getrennt voneinander erkennbar - Komponente C im Osten ist relativ schwach bzw. gut 1.5 Größenklassen schwächer als A
STF2619 AB 8m.9 8m.9 5.4" 242° 2017 Cyg 20h01m01.69s / +48°15'28.50"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Pale yellow-white stars, well split, near equal. Several other wider pairs. WDS says physical. My calculator says there is a -1% parallax range overlap, but all the upper and lower limits are 54 parsecs, and there is only 226 AU weighted separation with 0.99/0.98 Msun, so this very possibly is gravitational
H5 47, 26 Cyg AB 5m.2 8m.9 41.8" 150° 2018 Cyg 20h01m21.55s / +50°06'16.80"
BC 8m.9 12m.9 8.8" 76° 2015
BD 8m.9 15m.8 9.4" 258° 2015
AE 5m.2 11m.1 168.3" 343° 2012
René Merting
Drachhausen (Germany)
100mm (20x) AB: bei 20x ein weit getrenntes Pärchen mit schönem Farbkontrast - Komponente A im NW ist cremegelb, Komponente B ist mindestens 3 Größenklassen schwächer und zeigt sich weißgrau
STF2612 AB 8m.3 9m.9 42.5" 54° 2016 Aql 20h01m23.22s / +06°56'49.70"
BC 9m.9 12m.3 26.9" 41° 2016
René Merting
Drachhausen (Germany)
100mm (20x) AB: bei 32x weit getrenntes Pärchen - Komponente A im Westen ist schwach und weiß, B ist kupfer-braun bis kupfer-rot und eine halbe Größenklasse schwächer (im Nachgang habe ich festgestellt, dass ich mit meiner Helligkeitseinschätzung deutlich abgewichen bin, der Helligkeitsunterschied beträgt 1.6 mag) - 20x reicht auch völlig für die Trennung, B ist dann nur schwächer und der Farbeindruck schwächer
STF2613 AB 7m.5 8m.0 3.5" 355° 2019 Aql 20h01m26.66s / +10°44'54.80"

../images/binary-star-orbits/STF2613-AB-orbit.jpg

René Merting
Drachhausen (Germany)
100mm (64x) 64x reicht für die Trennung, dann stehen die beiden Sterne aber noch sehr dicht - beide mit gleicher Helligkeit und strahlend weiß - schick
Mark McCarthy
Fremont (California/USA)
152mm (175x) Lovely near equal white stars, good split. Physical with 2106-year period
Mark McCarthy
Fremont (California/USA)
152mm (285x) White, ~1 delta mag, nice wide split
STTA196 AB 7m.3 9m.3 53.7" 169° 2015 Cyg 20h01m51.46s / +40°51'31.70"
AC 7m.3 12m.3 137.0" 132° 2015
René Merting
Drachhausen (Germany)
100mm (20x) AB: bei 20x stehen beide Sterne weit auseinander - Komponente B im SO ist mindestens 2 Größenklassen schwächer - Farbkontrast durch Helligkeitsunterschied
AG245 8m.7 10m.2 16.7" 21° 2015 Cyg 20h01m52.19s / +31°39'12.40"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Easy, very wide, two delta. WDS uncertain, but there is no parallax range overlap (-78%)
STT395, 16 Vul 5m.8 6m.2 0.7" 128° 2019 Vul 20h02m01.45s / +24°56'16.80"

../images/binary-star-orbits/STT395-orbit.jpg

Mark McCarthy
Fremont (California/USA)
152mm (456x) Slightly unequal snowman at all powers. Notching increases in strength with increasing power. Physical with 1201-year period
Mark McCarthy
Fremont (California/USA)
203mm (667x) 16 Vul. Hairline split at 8" 333x. At 667x I see a more definite split. It appears only half delta mag, rather than the 1 delta mag in Sky Tools. Nice star.
Frederik Wanink
Itterbeck (Germany)
254mm (640x) fast getrennt, eher 8, ähnlich hell ../projects/double-stars/frederik-wanink/sketches/16Vul.jpg
Frederik Wanink
Itterbeck (Germany)
254mm ../projects/double-stars/frederik-wanink/photographs/16%20Vul.jpg
BU426 AB 8m.5 10m.5 5.9" 307° 2016 Cyg 20h02m07.92s / +54°38'28.00"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Part of a neat double-double with BU 427 CD, all of which Burnham discovered with the 6-inch. Equilateral triangle of equal magnitude stars, two of which are doubles which look very similar, both with 2 delta mag companions but one with twice (BU 426) the still close separation as the other (BU 427). Their PAs are about 45-degrees different, each pointed away from the third star in the triangle which unfortunately is not double. WDS says this one is not physical, but they're wrong: 44% parallax range overlap, 995 AU weighted separation, 1.94/1.20 Msun -- points to gravitational. If they rejected based on proper motion they may not have considered the direction of the orbit
BU427 CD 8m.4 10m.2 3.1" 336° 2011 Cyg 20h02m22.85s / +54°40'07.50"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Double-double with BU 426. WDS says not physical, and there is -16% parallax range overlap, so it is not (and the radial velocity delta exceeds the escape velocity anyway)
HO117 AB 10m.4 11m.7 5.2" 314° 2015 Cyg 20h02m29.65s / +33°40'56.50"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Unequal, wide, 1 delta. WDS uncertain, but it may well be gravitational: 27% parallax range overlap, 1,284 AU weighted separation, 1.46/1.06 solar mass
STF2616 6m.8 9m.6 3.4" 268° 2016 Aql 20h02m46.04s / +14°34'57.70"
René Merting
Drachhausen (Germany)
100mm (107x) bei 107x blitzt B immer westlich von A in dessen Glanz auf, B wirkt mehr wie ein schwacher grauer kompakter Schatten - bei 142x ist mit etwas Geduld B leicht abgesetzt von der gut 3 Magnituden heller geschätzten Komponente A erkennbar
Mark McCarthy
Fremont (California/USA)
203mm (533x) Pretty orange and blue pair, well separated about 2 delta mag. B very faint in 8", but know is there. With 20" easily seen as a brighter star. Nice pair
STF2615 7m.6 10m.3 8.9" 301° 2015 Aql 20h02m54.05s / +08°23'50.70"
Mark McCarthy
Fremont (California/USA)
203mm (205x) White A and much fainter reddish B, wide. Not physical
HO454 7m.5 11m.4 5.9" 53° 2015 Cyg 20h03m13.50s / +50°27'53.70"
Mark McCarthy
Fremont (California/USA)
508mm (205x) B visible with averted vision, wide, 4 delta mag. WDS says physical, and there is 0% overlap in their parallax ranges, 1,295 AU weighted separation, and 2.51/1.05 Msun, so could be gravitational
STT396 6m.1 10m.4 46.6" 208° 2015 Sge 20h03m16.40s / +18°30'03.60"
Mark McCarthy
Fremont (California/USA)
178mm (205x) Light orange and super-wide B. Not physical
STF2618 9m.4 9m.8 5.6" 115° 2018 Aql 20h03m26.98s / +15°28'14.40"
Mark McCarthy
Fremont (California/USA)
203mm (533x) Near equal, whiteish blue stars, wide. Nice
STF2624 AB 7m.1 7m.7 1.9" 174° 2018 Cyg 20h03m29.42s / +36°01'28.60"
AC 7m.1 9m.3 42.3" 327° 2018
AD 7m.1 12m.9 29.0" 171° 2018
BC 7m.7 9m.3 44.7" 328° 2018
Robert Zebahl
Leipzig (Germany)
63mm (120x) AB: 2021-08-15: At magnifications from 120x to 168x the double star appears clearly as an '8'. The diffraction disks still overlap slightly. The moderate brightness difference is visible.
Robert Zebahl
Leipzig (Germany)
70mm (133x) 2021-08-15: The pair AB appears separated but very tight with almost touching diffraction disks. A moderate difference in brightness is visible. The fainter component C is clearly more separated. A, B & C form an obtuse triangle.
René Merting
Drachhausen (Germany)
100mm (32x) AC: bei 32x ist Komponente C in weitem Abstand von A erkennbar und bestimmt 2.5 bis 3 Größenklassen schwächer - Komponente B (7.73 mag / Sep. 2"/ P.A. 328°) habe ich wohl übersehen, weil nicht höher vergrößert, schade
Mark McCarthy
Fremont (California/USA)
152mm (175x) AB: Very slightly unequal magnitude, close white stars. WDS uncertain, but there is 22% overlap and a rather wide 4,020 AU weighted separation, and very high stellar mass 8.58/7.70 -- so maybe
Mark McCarthy
Fremont (California/USA)
317mm (277x) AB: A with 2x fainter B well separated, plus an arc of 3 stars. (4 stars in system, AB AC AD BC)
HJ1470 7m.4 9m.2 29.3" 341° 2016 Cyg 20h03m39.50s / +38°19'38.30"
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x weit getrenntes Pärchen - Komponente B im NW ist nur schwach erkennbar - bei 32x Farbkontrast weiß/grau
Mark McCarthy
Fremont (California/USA)
508mm (333x) Pretty yellow & blue pair, wide separation. Alberio-like
A1194 9m.5 9m.7 1.1" 317° 2015 Aql 20h03m59.56s / +12°21'23.80"
Mark McCarthy
Fremont (California/USA)
203mm (533x) Near equal bluish-white (seems nearly all 9th magnitude stars appear bluish white in my 8"). Cleanly split with seeing, 1".
15 Sge STT592 AB 5m.9 9m.5 163.2" 291° 2015 Sge 20h04m06.22s / +17°04'12.60"
STT592 AC 5m.9 6m.9 217.0" 335° 2015
BUP202 AD 5m.9 11m.3 89.1" 2015
BUP202 AE 5m.9 11m.8 175.0" 51° 2013
BUP202 AF 5m.9 12m.3 142.4" 315° 2015
STTA202 BG 9m.5 9m.0 181.4" 230° 2015
BUP202 CH 6m.9 12m.3 95.6" 185° 2015
SMR20 AI 5m.9 11m.1 132.1" 129° 2015
TNN14 AJ 4m.4 13m.5 3.3" 283° 2004
TNN14 AK 4m.4 12m.4 6.2" 162° 2004
TNN14 AL 4m.4 13m.0 9.3" 140° 2004
John Raymond
Richmond (Virginia/USA)
../projects/double-stars/john-raymond/photographs/15_sge.jpg
STF2622 AB 8m.7 9m.5 6.0" 193° 2018 Sge 20h04m08.99s / +17°00'02.90"
Mark McCarthy
Fremont (California/USA)
203mm (333x) Well separated half delta mag. Part of 2 plus one system [AC 11.7 & 17.1". Ba,Bb is 10th mag & 0.2"]
STF2620, V1470 Aql AB 8m.2 9m.2 1.9" 287° 2016 Aql 20h04m09.25s / +11°47'40.30"
Mark McCarthy
Fremont (California/USA)
203mm (533x) Almost 2 delta mag, ~1.5" easily split pair, nice. [Eclipsing binary]
COU325 AB 9m.4 10m.9 0.8" 227° 2006 Sge 20h04m22.33s / +17°14'33.00"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Very finely split with 333x, large delta mag, delicate pair
A1413 10m.0 10m.6 2.4" 139° 2017 Cyg 20h04m34.48s / +36°40'49.10"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Pretty tough in a dense field of faint stars, closely separated and 1 delta mag. WDS uncertain, but it is likely gravitational: 78% parallax range overlap, 1,376 AU weighted separation, 2.46/1.99 Msun
STF2621 8m.4 8m.6 5.7" 224° 2017 Aql 20h04m34.52s / +09°14'24.20"
René Merting
Drachhausen (Germany)
100mm (32x) bei 32x knapp getrennt, da passt maximal eine Lage 80g-Papier dazwischen - bei 64x ein schönes enges Pärchen, etwas besser getrennt - beide Sterne annähernd gleichhell, Komponente B müsste der Stern im NW sein - A reinweiß, B auch mit einem Stich ins grau
Mark McCarthy
Fremont (California/USA)
203mm (533x) More equal than SkyTools data shows, one is orange and the other blue. Maybe the orange star is variable. Wide separation, another nice pair
STT397 7m.4 9m.6 46.1" 179° 2016 Aql 20h04m46.86s / +15°54'11.30"
René Merting
Drachhausen (Germany)
100mm (20x) bei 32x ein weit getrenntes Pärchen - Komponente B im Süden ist deutlich schwächer und hat kaum Farbe - zurück auf 20x sind beide Sterne noch immer gut getrennt sichtbar, Komponente B ist mit etwas Konzentration knapp sichtbar
BU56 8m.0 9m.1 1.3" 187° 2012 Aql 20h05m07.26s / -04°18'29.30"
Mark McCarthy
Fremont (California/USA)
317mm (553x) Orange and blue. <1", 1 delta mag.
BU1481 AB 6m.2 13m.2 42.7" 240° 2015 Cyg 20h05m09.78s / +38°28'42.40"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Faint and very wide i wonder at the interest, proper motions? WDS says not physical
BU1480 9m.2 11m.4 8.2" 328° 2015 Cyg 20h05m09.84s / +38°57'06.10"
Mark McCarthy
Fremont (California/USA)
508mm (205x) White A and 2 delta B, well separated. WDS says not physical, and I can't find the companion in Gaia
COU1806 10m.6 10m.6 1.2" 288° 2008 Cyg 20h05m18.16s / +33°07'00.90"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Excellent near equal pair, faint and very close, split with 205x, wider with 333x. WDS uncertain, and there is no parallax range overlap (-25%)
BU57 6m.6 11m.0 2.6" 120° 2008 Aql 20h05m26.53s / +15°30'01.30"
Mark McCarthy
Fremont (California/USA)
203mm (533x) V1472 Aql. At 8" the B appears as a suspected brightening in the diffraction, whitish to the A star's orange. At 20" the B star is obvious and blue a nice sharp point ~2.5"
SHJ316 AB 7m.8 8m.8 69.4" 323° 2018 Cyg 20h05m39.80s / +35°36'28.10"
René Merting
Drachhausen (Germany)
100mm (64x) bei 64x ist der kleine Begleiter indirekt zu erkennen, beide sind getrennt sichtbar - schön in Kombination mit dem Mini-W (Asterismus Alessi J0022.7+5417)
ES498 8m.9 12m.5 8.3" 309° 2015 Cyg 20h05m42.33s / +30°19'39.30"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Like many Espins, this B star needed averted vision to show itself. Very faint, wide. WDS uncertain, but there is no parallax range overlap (-97%)
A1197 9m.9 10m.1 0.8" 331° 2017 Cyg 20h05m50.59s / +29°46'04.90"
Mark McCarthy
Fremont (California/USA)
508mm (445x) Nice light orange stars at the tip of a triangle of similar mag stars, split with 333x with seeing, wider with 445x, noticeably unequal. WDS uncertain, and surprisingly no parallax range overlap, -59%
★★ SHJ314, V1676 Cyg AF 6m.8 7m.3 36.3" 28° 2019 Cyg 20h05m57.32s / +35°47'18.20"
AD 6m.8 9m.5 11.3" 300° 2019
René Merting
Drachhausen (Germany)
100mm (32x) AD: bei 32x ist westlich von A knapp getrennt ein sehr schwacher Lichtpunkt erkennbar - mindestens 3 Größenklassen Helligkeitsunterschied zwischen A und D - zurück auf 20x sind beide Sterne auch noch ganz knapp getrennt erkennbar
AF: bei 32x sind zwei weit auseinander stehende Sterne erkennbar, Komponente F im NO ist nur unwesentlich schwächer und strahlt nicht ganz so klar wie A
Uwe Pilz
Leipzig (Germany)
105mm (144x) liegt gemeinsam mit SHJ 315 im OC NGC 6871. Die Zeichnung des gesamten Haufens enthält nur die hellsten Sterne. ../projects/double-stars/uwe-pilz/sketches/190726shj314_315.jpg
BU440, V1676 Cyg AB 6m.8 12m.0 6.9" 63° 2015 Cyg 20h05m57.32s / +35°47'18.20"
Mark McCarthy
Fremont (California/USA)
508mm (205x) In a busy open cluster
ES25 & SHJ315 & WAL127 & SEI865 ES25 AB 7m.9 12m.0 8.6" 122° 2015 Cyg 20h06m01.36s / +35°45'55.90"
ES25 AC 7m.9 14m.8 11.8" 297° 2015
SHJ315 AD 7m.9 8m.7 20.2" 236° 2018
WAL127 AE 7m.9 11m.7 33.7" 94° 2015
ES25 AF 7m.9 6m.8 95.7" 329° 2017
SEI865 EG 11m.7 11m.8 14.5" 196° 2015
René Merting
Drachhausen (Germany)
100mm (32x) SHJ315 (AD): bei 32x zeigt sich das Sternpaar weit getrennt und insgesamt schwächer als das unmittelbar nordwestlich liegende Dreifachsystem SHJ 314 - Komponente B im SW wirkt graubraun
GYL88 11m.5 11m.8 9.9" 152° 2015 Cyg 20h06m05.68s / +34°17'00.70"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Unremarkable faint wide pair. A.N. Goyal. WDS says physical, and there is 19% parallax range overlap, but a very wide 16,756 AU weighted separation, 2.67/2.41 solar mass. Needs more time and observations before calling it
GYL23 11m.0 12m.1 13.3" 180° 2015 Cyg 20h06m32.99s / +33°02'17.00"
Mark McCarthy
Fremont (California/USA)
508mm (205x) Very faint wide B. Not physical
STTA198 AB 7m.1 7m.5 64.6" 185° 2018 Aql 20h06m38.76s / +07°34'34.20"
René Merting
Drachhausen (Germany)
12x50 ein schöner, einfacher FG-Doppelstern - ein Paar heller Sterne, gut getrennt - das Paar steht gut isoliert - B ist eine halbe Größenklasse schwächer
BU428 7m.5 9m.1 0.8" 356° 2008 Aql 20h06m43.37s / +12°56'12.10"
Mark McCarthy
Fremont (California/USA)
508mm (533x) Definite hard split with 20", slightly yellow A and yellow-orange B star. With 8" the B is more a round haze snowman-to-hairline split with seeing.
BRT1336 9m.9 10m.8 5.5" 292° 2018 Aql 20h07m00.13s / +12°20'16.80"
Mark McCarthy
Fremont (California/USA)
203mm (533x) Easy wide split about half delta mag, stars appear blue
STF2631 8m.1 9m.1 4.6" 339° 2018 Sge 20h07m13.84s / +21°06'13.40"
René Merting
Drachhausen (Germany)
100mm (64x) bei 32x ist Komponente B schon angedeutet nördlich von A erkennbar - bei 64x dann ist B knapp getrennt von A erkennbar - beide Komponenten strahlen weißlich ohne erkennbare Färbung
Mark McCarthy
Fremont (California/USA)
203mm (333x) Subtle yellow and blue stars, very light. 1.5 delta mag, wide.
Mark McCarthy
Fremont (California/USA)
317mm (553x) Very nice orange and blue, a mini Alberio, a little more equal magnitude, though. ~5", 1 delta mag.
STF2629 7m.6 10m.6 9.0" 188° 2015 Aql 20h07m20.78s / +16°04'34.70"
Mark McCarthy
Fremont (California/USA)
203mm (533x) White and rather strikingly blue star (and I don't think it's blue because it's faint), wide separation, 2 delta mag.
STT398 AB 7m.5 9m.2 1.0" 82° 2015 Cyg 20h07m23.69s / +35°43'05.90"
Mark McCarthy
Fremont (California/USA)
158mm (445x) With clear disks and still a bit wavering seeing, I can split this nicely, the stars are 2 delta mag, dull blue-white A and blue B. Spectral class O9.5III+ (blue). WDS uncertain, but they likely are not gravitational: -28% parallax range overlap
Mark McCarthy
Fremont (California/USA)
317mm (553x) B is very faint, appears as a brightening or pin-prick in A's diffraction. 2-3 delta mag, ~1"
A1416 8m.3 11m.2 4.7" 42° 2015 Cyg 20h07m34.39s / +38°37'51.50"
Mark McCarthy
Fremont (California/USA)
178mm (205x) B emerges to view with averted vision and foveal coaxing, really nice, 3 delta mag, well separated around 5". WDS uncertain, but it is not likely gravitational: -71% parallax range overlap
WEB12 8m.4 8m.4 40.1" 77° 2019 SGE 20h07m45.66s / +19°50'14.00"
René Merting
Drachhausen (Germany)
100mm (20x) bei 32x weit auseinander stehend - Komponente B im Osten ist nur knapp schwächer als A - Komponente A strahlt gelblich, B wirkt kühler weiß-blau - auch bei 20x sind beide Sterne gut getrennt erkennbar
STF2628 6m.6 8m.7 3.0" 338° 2016 Aql 20h07m50.37s / +09°23'59.40"
René Merting
Drachhausen (Germany)
100mm (142x) bei 107x ist Komponente A so hell, dass B nur angedeutet nordwestlich von A sichtbar ist und sich noch nicht lösen kann - bei 142x dann knappe Trennung, B erscheint mindestens 3 Magnituden schwächer (lt. WDS/Stelle Doppie nur 2 Magnituden)
Mark McCarthy
Fremont (California/USA)
203mm (533x) Nice, very pretty white and light orange B star, 3 delta mag, wide separation. Very pretty pair.
STF2633 AB 8m.0 11m.0 11.6" 101° 2015 Cyg 20h07m57.93s / +32°35'10.80"
Mark McCarthy
Fremont (California/USA)
317mm (553x) 3 delta mag, wide, 2 more on the opposite side. (4 stars visible, AC & AC = HJ 1483. CD = SEI 900, not seen)
Mark McCarthy
Fremont (California/USA)
508mm (205x) White, fairly wide, unremarkable Struve, 2 delta mag. WDS uncertain, but it may be gravitational: 46% parallax range overlap, 10,621 AU weighted separation, 4.72/2.33 solar mass
A382 7m.2 9m.5 1.7" 96° 2016 Cyg 20h08m01.18s / +42°23'06.00"
Mark McCarthy
Fremont (California/USA)
178mm (445x) A bit difficult, A is fairly bright, B is significantly fainter and resolves with seeing, fairly well separated around 2". WDS calls it physical, but there is -37% parallax range overlap
J1168 10m.1 10m.7 0.9" 192° 2015 Sge 20h08m12.46s / +21°06'11.20"
Mark McCarthy
Fremont (California/USA)
508mm (333x) Very fine split, ~1 delta, <1", nice
HJ606 8m.0 8m.1 44.0" 229° 2017 Cyg 20h08m21.92s / +38°08'20.00"
René Merting
Drachhausen (Germany)
100mm (20x) bei 20x zwei gut getrennte gleich helle Sterne, A im NO ist einen kleinen Tick heller - bei 32x Komponente A im NO weiß, B mit einem Stich ins blau-grüne
Mark McCarthy
Fremont (California/USA)
508mm (333x) Wide separation equal magnitude yellow-white pair.
A721 8m.4 11m.5 4.0" 43° 2016 Cyg 20h08m27.15s / +46°22'29.60"