- Double Stars (Per) -

And (55) Cep (25) Cyg (93) Leo (35) Peg (34) SGE (1)
Aql (52) Cet (5) Del (16) Lep (6) Per (35) Sgr (10)
Aqr (4) CMa (5) Dra (19) Lib (1) Psc (17) Tau (15)
Ari (8) CMi (3) Equ (7) LMi (6) Pup (1) Tri (5)
Aur (28) Cnc (10) Eri (3) Lyn (18) Sco (4) UMa (46)
Boo (32) Com (13) Gem (30) Lyr (32) Sct (4) UMi (5)
Cam (17) CrB (10) Her (58) Mon (12) Ser (21) Vir (20)
Cap (6) Crv (4) Hya (11) Oph (14) Sex (6) Vul (12)
Cas (39) CVn (16) Lac (13) Ori (38) Sge (8)

20 Per (**)

Name: 20 Per
Type: **
Constellation: Per
Coordinates: 02h53m42.58s / +38°20'15.60"

Components:
m1 m2 ρ θ Year
BU524 AB 5m8 6m8 0.2" 321° 2008
STF318 AB-C 5m4 9m7 14.0" 237° 2014
STF318 AB-D 5m4 12m6 58.1" 40° 2002
René Merting
100mm f/6.4, 64x
AB-C: trotz großem Abstand sind 64x notwendig für die Trennung - Komponente C ist zu schwach für niedrigere Vergrößerungen, C ist vielleicht 3.5 mag schwächer als AB - jetzt bei 64x, wo C sichtbar wird, ist der Stern schon gut abgesetzt von AB erkennbar und wirkt leicht bräunlich, AB dagegen strahlt warm-weiß

A 2906 & STF 314 (**)

Name: A2906 & STF314, WDS02529+5300
Type: **
Constellation: Per
Coordinates: 02h52m52.03s / +52°59'50.60"

Components:
m1 m2 ρ θ Year
A2906 AB 7m3 8m8 0.3" 115° 2018
STF314 AB-C 7m0 7m3 1.6" 316° 2018

../images/binary-star-orbits/A2906-AB-orbit.jpg ../images/binary-star-orbits/STF314-AB-C-orbit.jpg

Robert Zebahl
152mm f/5.9, 129x, Bortle 6, SQM-L 19.2
STF314 (AB-C): Beautifully separated, quite close together. Difference in brightness visible, but rather small. Easy to find and bright. Very nice.

BU 533 (**)

Name: BU533
Type: **
Constellation: Per
Coordinates: 03h35m37.81s / +31°40'48.70"

Components:
m1 m2 ρ θ Year
AB 7m5 7m7 1.0" 222° 2018

../images/binary-star-orbits/BU533-AB-orbit.jpg

Robert Zebahl
152mm f/5.9, 225x, Bortle 6, SQM-L 19.2
At 129x clearly elongated, notched. At 225x just so separable with similarly bright components.

BU 535 (**)

Name: BU535, omicron Per, 38 Per, Atik
Type: **
Constellation: Per
Coordinates: 03h44m19.13s / +32°17'17.70"

Components:
m1 m2 ρ θ Year
3m9 6m7 1.1" 20° 2015
Robert Zebahl
152mm f/5.9, 300x, Bortle 6-, SQM-L 19.0
In steady moments the faint companion is clearly recognizable as a small brightening in the first diffraction ring of the primary component.

eta Per (**)

Name: eta Per, 15 Per
Type: **
Constellation: Per
Coordinates: 02h50m41.81s / +55°53'43.80"

Components:
m1 m2 ρ θ Year
STF307 AB 3m8 8m5 28.7" 301° 2018
STF307 AC 3m8 11m6 64.0" 269° 2014
WAL19 AF 3m8 11m4 57.7" 25° 2013
WRD1 CD 11m6 12m7 5.2" 116° 2015
SHJ34 AE 3m8 9m2 242.9" 297° 2012
FYM161 CG 11m6 14m0 15.8" 229° 2015
René Merting
B 16x70
STF307 (AB): Miram, die Komponente A ist satt gelb und bildet ein flaches Dreieck mit zwei Sternen westlich und nordwestlich, die 1,8' und 3,9' entfernt stehen - dazwischen wird alles vom Glanz von Miram überstrahlt - im Fernglas hat B mit den eigentlich ordentlichen Daten wie Abstand 30,4" und Helligkeit 8.5 mag (andere Quellen sagen 10.7 mag) trotzdem keine Chance auf Erleuchtung

100mm f/6.4, 32x
STF307 (AB): bei 32x sehr ansehnlich - Komponente B steht gut getrennt nordwestlich vom signal-gelben Eta Persei - Helligkeitsunterschied sehr groß, nicht abschätzbar

HJ 1123 (**)

Name: HJ1123
Type: **
Constellation: Per
Coordinates: 02h41m58.44s / +42°47'30.60"

Components:
m1 m2 ρ θ Year
8m4 8m5 21.1" 249° 2019
René Merting
100mm f/6.4, 32x
bei 32x knapp getrennt - ein schwacher Doppelstern, der kaum auffällt im Zentrum des Sternhaufens M 34

HJ 2143 (**)

Name: HJ2143
Type: **
Constellation: Per
Coordinates: 02h33m32.79s / +57°32'14.80"

Components:
m1 m2 ρ θ Year
AB 8m1 9m6 23.5" 20° 2018
René Merting
B 16x70
Komponente B ist nur mit viel Konzentration knapp getrennt und sehr schwach nordöstlich von A zu erkennen - schwierig

100mm f/6.4, 32x
bei 32x ein ordentlich getrenntes Pärchen - Komponente B ist sehr schwach, gut 1.5 Größenklassen schwächer - Komponente A ist weiß, B wirkt grau

12.5" f/4.5, 45x
bei 45x ein weit getrenntes Pärchen, auffallend am südwestlichen Rand der Sternhaufens NGC 957 - Komponente B ist gut 1.5 Magnituden schwächer - A weiß, B rostbraun

HU 103 (**)

Name: HU103
Type: **
Constellation: Per
Coordinates: 03h45m22.61s / +49°51'42.40"

Components:
m1 m2 ρ θ Year
AB 8m7 8m9 1.2" 203° 2018
Robert Zebahl
152mm f/5.9, 225x, Bortle 6-, SQM-L 19.0
At 100x slightly elongated, at 129x elongated, notched. At 225x clearly separated, but tight with little difference in brightness.

HU 544 (**)

Name: HU544
Type: **
Constellation: Per
Coordinates: 03h15m48.70s / +50°57'21.20"

Components:
m1 m2 ρ θ Year
6m7 8m2 1.7" 103° 2018

../images/binary-star-orbits/HU544-orbit.jpg

Robert Zebahl
70mm f/5.7, 133x, Bortle 6, SQM-L 19.2
Clearly seen as figure '8' with noticeable difference in brightness.

152mm f/5.9, 129x, Bortle 6-, SQM-L 19.0
Wonderfully separated in equally beautiful star surroundings! Clear difference in brightness visible. To the east there is a brighter star, which shines yellowish-orange. HU544 itself seems rather cool in color.

../sketches/2019-11-23_hu544.jpg

S 430 (**)

Name: S430
Type: **
Constellation: Per
Coordinates: 03h38m18.83s / +44°48'06.50"

Components:
m1 m2 ρ θ Year
AB 7m2 7m5 41.0" 96° 2017
Robert Zebahl
B 16x70, Bortle 6, SQM-L 19.2
2020-11-07: Easily separated at moderate separation, nearly equal in brightness. White-yellowish & white-bluish.

René Merting
B 16x70
ein schöner Fernglas-Stern - beide Komponenten sind hell genug und stehen weit genug auseinander - sie sind mehr als ordentlich getrennt - die B-Komponente im Osten wirkt ein bisschen wärmer im Farbton

S 445 & ES 2604 (**)

Name: S445 & ES2604, WDS04210+5015
Type: **
Constellation: Per
Coordinates: 04h20m57.50s / +50°15'17.40"

Components:
m1 m2 ρ θ Year
S445 AB 7m3 8m2 71.0" 328° 2017
S445 AC 7m3 9m3 150.3" 263° 2016
ES2604 AD 7m3 14m8 24.8" 321° 2015
ES2604 BE 8m2 11m2 23.3" 263° 2015
Robert Zebahl
B 16x70, Bortle 6, SQM-L 19.2
2020-11-07: Together with the uneven double star STF519 in one field of view. The three widely separated, differently bright components A, B and C form a prominent triangle, with A appearing orange. Very beautiful!

102mm f/11, 28x, Bortle 7-
2020-11-08: Components A, B & C visible as a prominent triangle of different brightness. Component A appears slightly yellowish. Together with the northern located double star STF519 in one field of view. Very nice!

../sketches/2020-11-08_stf519_s445.jpg

STF 162 (**)

Name: STF162
Type: **
Constellation: Per
Coordinates: 01h49m15.47s / +47°53'47.10"

Components:
m1 m2 ρ θ Year
AB 6m5 7m2 2.0" 199° 2018
AC 6m5 9m2 20.6" 178° 2019
AD 6m5 10m0 138.7" 96° 2007
BC 7m2 9m2 19.2" 177° 2018
Robert Zebahl
70mm f/5.7, 100x
AB: At 100x partly split, otherwise '8'-shaped. At 128x clearly split. Difference in brightness noticeable.

René Merting
B 16x70
AC: ein schwieriges Paar aufgrund des Helligkeitsunterschiedes - mit etwas Geduld offenbart sich Komponente C knapp südlich von A sehr dicht an dessen hellem Glanz - die Trennung ist nur in ruhigen Momenten kurzzeitig sichtbar

STF 230 (**)

Name: STF230
Type: **
Constellation: Per
Coordinates: 02h14m57.07s / +58°29'26.00"

Components:
m1 m2 ρ θ Year
7m9 9m4 23.8" 259° 2015
René Merting
B 16x70
ein knapp getrenntes Pärchen - Komponente B westlich von A wirkt wie ein schwacher Schimmer - kaum ein Farbunterschied, obwohl B gut 1.5 Größenklassen schwächer ist - bei diesem Helligkeitsunterschied wirkt die schwächere Komponente meist dumpf grau-braun, hier ist das nicht der Fall

100mm f/6.4, 20x
bei 32x einfach getrennt - Komponente B im Westen ist gut 1.5 Größenklassen schwächer und grau, A ist auch nicht wirklich strahlend weiß - zurück auf 20x noch immer ein gut getrenntes Pärchen

STF 268 (**)

Name: STF268
Type: **
Constellation: Per
Coordinates: 02h29m24.96s / +55°32'10.50"

Components:
m1 m2 ρ θ Year
6m7 8m5 2.9" 131° 2018
Robert Zebahl
70mm f/5.7, 80x, Bortle 6
At 67x the faint companion can be guessed and is still slightly outshined by the primary component. At 80x and 100x relatively well separable with clear difference in brightness, but close together. The companion is close to the first diffraction ring of the primary component.

152mm f/5.9, 129x, Bortle 6, SQM-L 19.2
Easily separable with significant difference in brightness. The fainter companion is nicely separated from the primary component and visible as a tiny star.

René Merting
100mm f/6.4, 107x
bei 64x lässt sich der Stern nicht richtig scharf stellen - bei 107x ist Komponente B dann ganz knapp getrennt südöstlich von A erkennbar - Helligkeitsunterschied eine 3/4 Größenklasse (1.78 mag lt. Stelle Doppie)

STF 270 (**)

Name: STF270
Type: **
Constellation: Per
Coordinates: 02h30m50.65s / +55°32'54.20"

Components:
m1 m2 ρ θ Year
AB 7m0 9m7 21.3" 306° 2016
AC 7m0 11m4 48.0" 333° 2015
AD 7m0 14m2 51.1" 281° 2015
BD 9m7 14m2 32.8" 265° 2015
René Merting
B 16x70
AB: der Doppelstern steht innerhalb einer sehenswerten Formation aus 6 Sternen, die ein gleichseitiges Dreieck bilden - die hellsten drei Sterne bilde eine Seite im Norden, zur Spitze nach Süden werden die Sterne immer schwächer - STF270 steht mitten in der Nordseite - Komponente B ist wie ein kleiner zarter Hauch nordwestlich von A erkennbar, Helligkeitsunterschied mehr als 2.5 Größenklassen - kein reizvoller Fernglas-Doppelstern, aber die Umgebung ist interessant

100mm f/6.4, 32x
AB: bei 32x ein leichter Fang, ein gut getrenntes Pärchen - Komponente B im NW ist zwar sehr schwach, aber direkt immer noch gut erkennbar - Helligkeitsunterschied 3 Größenklassen - Komponente A strahlend weiß, B eher grau, wenn überhaupt als Farbe erkennbar

STF 272 (**)

Name: STF272
Type: **
Constellation: Per
Coordinates: 02h33m08.71s / +58°27'44.90"

Components:
m1 m2 ρ θ Year
8m3 8m4 1.9" 216° 2017
Robert Zebahl
152mm f/5.9, 129x, Bortle 6, SQM-L 19.2
Easy to separate, but close together with very little difference in brightness. Beautiful view. Double star stands in a half arc of stars.

STF 301 (**)

Name: STF301
Type: **
Constellation: Per
Coordinates: 02h47m38.75s / +53°56'35.80"

Components:
m1 m2 ρ θ Year
7m8 8m7 8.2" 18° 2016
Robert Zebahl
70mm f/5.7, 22x, Bortle 6
Rather faint double star with a handful of other stars in the immediate vicinity. At 22x clearly separated, but still close together with visible difference in brightness. At 31x the primary component looked slightly orange.

René Merting
100mm f/6.4, 32x
bei 32x ganz knapp getrenntes Pärchen - Komponente B im Norden ist eine halbe Größenklasse schwächer - nett anzusehen

STF 331 (**)

Name: STF331
Type: **
Constellation: Per
Coordinates: 03h00m52.18s / +52°21'06.50"

Components:
m1 m2 ρ θ Year
5m2 6m2 12.0" 86° 2019
Robert Zebahl
63mm f/13.3, 46x
Easy to separate with relatively large difference in brightness.

René Merting
100mm f/6.4, 20x
bei 32x ein feines Pärchen, besser als knapp getrennt und richtig hell - Komponente A im Osten ist rein-weiß, B dagegen in einem eigenartigen kupfer-weiß, wenn man das so sagen kann - bei 20x passt nur noch ein dünnes Blatt Papier zwischen die beiden Sterne

STF 337 (**)

Name: STF337
Type: **
Constellation: Per
Coordinates: 03h02m16.79s / +41°23'45.70"

Components:
m1 m2 ρ θ Year
AB 8m0 9m3 17.6" 163° 2015
René Merting
100mm f/6.4, 32x
bei 32x ein gut getrenntes Pärchen, Komponente B im SO ist deutlich schwächer, gerade so erkennbar - deshalb wirkt B auch farblos gegen die weiße Komponente A

STF 360 (**)

Name: STF360
Type: **
Constellation: Per
Coordinates: 03h12m09.59s / +37°13'03.30"

Components:
m1 m2 ρ θ Year
8m0 8m3 2.7" 126° 2015

../images/binary-star-orbits/STF360-orbit.jpg

Robert Zebahl
70mm f/5.7, 67x, Bortle 6
Pretty faint double star. At 57x barely separable with almost touching diffraction disks. The components seemed similarly bright. At 67x still very close together, at 100x easy to separate.

152mm f/5.9, 69x, Bortle 6-, SQM-L 19.0
Split, but close together, similarly bright. The double star appears overall slightly orange compared to the surrounding stars.

STF 369 (**)

Name: STF369
Type: **
Constellation: Per
Coordinates: 03h17m11.45s / +40°28'58.60"

Components:
m1 m2 ρ θ Year
6m8 7m7 3.6" 29° 2016
Robert Zebahl
70mm f/5.7, 57x, Bortle 6
At 44x still separable with noticeable difference in brightness. At 57x well separable, whereby the components are still very close together. The difference in brightness is more clearly visible here.

152mm f/5.9, 100x, Bortle 6-, SQM-L 19.0
Easily separable with clear difference in brightness. In terms of color, both components appeared slightly different: white-yellowish, slightly orange.

René Merting
100mm f/6.4, 64x
bei 64x knapp getrennt - Komponente B im NO wirkt eine halbe Größenklasse schwächer - beide Sterne schneeweiß

STF 388 (**)

Name: STF388
Type: **
Constellation: Per
Coordinates: 03h28m40.39s / +50°26'10.80"

Components:
m1 m2 ρ θ Year
8m0 9m0 2.8" 214° 2018
René Merting
100mm f/6.4, 107x
bei 107x zeigt sich Komponente B südlich von A und nur in guten Momenten sind beide Sterne knapp getrennt zu sehen

STF 391 (**)

Name: STF391
Type: **
Constellation: Per
Coordinates: 03h29m13.74s / +45°02'57.50"

Components:
m1 m2 ρ θ Year
7m6 8m3 3.9" 96° 2018
Robert Zebahl
70mm f/5.7, 57x, Bortle 6
Clearly split, but close together, moderate difference in brightness. The double star is located in a very beautiful star field with some of the stars appearing colored, but this only came into its own at low magnification.

152mm f/5.9, 69x, Bortle 6-, SQM-L 19.0
Easy to separate with moderate difference in brightness. Slight difference in color: white-yellowish, slightly orange.

STF 425 (**)

Name: STF425
Type: **
Constellation: Per
Coordinates: 03h40m07.24s / +34°06'59.30"

Components:
m1 m2 ρ θ Year
AB 7m5 7m6 1.9" 59° 2018

../images/binary-star-orbits/STF425-AB-orbit.jpg

Robert Zebahl
152mm f/5.9, 129x, Bortle 6, SQM-L 19.2
Beautifully separated, relatively close together, very little difference in brightness.

STF 434 (**)

Name: STF434
Type: **
Constellation: Per
Coordinates: 03h43m58.92s / +38°22'25.60"

Components:
m1 m2 ρ θ Year
AB 7m8 8m3 33.7" 83° 2019
AC 7m8 13m6 91.9" 350° 2015
Robert Zebahl
B 16x70, Bortle 6, SQM-L 19.2
AB: 2020-11-07: Beautiful sight! Nice separation and color contrast: vivid orange & subtle blue.

102mm f/11, 28x, Bortle 7-
AB: 2020-11-08: Easy to separate, beautiful sight! Light orange & light blue.

../sketches/2020-11-08_stf434.jpg

STF 443 (**)

Name: STF443
Type: **
Constellation: Per
Coordinates: 03h47m02.11s / +41°25'38.10"

Components:
m1 m2 ρ θ Year
AB 8m2 8m8 6.7" 56° 2020
AC 8m2 11m4 106.2" 331° 2002

../images/binary-star-orbits/STF443-AB-orbit.jpg

Robert Zebahl
102mm f/11, 28x, Bortle 7-
AB: 2020-11-08: Nicely separated, relatively close together with little difference in brightness.

STF 464 (**)

Name: STF464, zeta Per, 44 Per
Type: **
Constellation: Per
Coordinates: 03h54m07.92s / +31°53'01.20"

Components:
m1 m2 ρ θ Year
AB 2m9 9m2 12.9" 209° 2012
AC 2m9 11m2 33.3" 286° 2012
AD 2m9 10m4 98.6" 195° 2012
AE 2m9 10m0 120.0" 186° 2012
Robert Zebahl
102mm f/11, 106x, Bortle 4, SQM-L 21.2
AB: Easy to separate, but the B component appeared only as a very faint, tiny companion.

STF 471 (**)

Name: STF471, epsilon Per, 45 Per
Type: **
Constellation: Per
Coordinates: 03h57m51.22s / +40°00'36.90"

Components:
m1 m2 ρ θ Year
AB 2m9 8m9 9.1" 10° 2015
Robert Zebahl
63mm f/13.3, 46x
Easy to separate, but much fainter, second component, which appears as a small, faint spot. Nice view.

STF 476 (**)

Name: STF476
Type: **
Constellation: Per
Coordinates: 04h01m34.83s / +38°39'55.80"

Components:
m1 m2 ρ θ Year
AB 8m0 9m2 25.9" 289° 2015
BC 9m2 13m1 69.7" 210° 2015
Robert Zebahl
B 16x70, Bortle 6, SQM-L 19.2
AB: 2020-11-07: Easy to split at moderate distance and clear difference in brightness. Companion well visible as a tiny star. Primary component appears slightly orange.

STF 519 & GUI 5 (**)

Name: STF519 & GUI5, WDS04209+5023
Type: **
Constellation: Per
Coordinates: 04h20m53.71s / +50°22'39.00"

Components:
m1 m2 ρ θ Year
STF519 AB 7m8 9m4 17.9" 348° 2015
GUI5 AC 7m8 10m8 108.8" 193° 2015
Robert Zebahl
B 16x70, Bortle 6, SQM-L 19.2
STF519 (AB): 2020-11-07: Beautifully framed by brighter stars! Primary component A appears slightly orange with a much fainter, very close companion. To the south is S445, which forms a prominent triangle of stars of different brightness. The brightest of these three stars also appears orange.

102mm f/11, 28x, Bortle 7-
STF519 (AB): 2020-11-08: Well separated with large difference in brightness. Primary component appeared white-yellowish. South very outstanding is the double star S445. Worthwhile due to the beautiful surroundings.

../sketches/2020-11-08_stf519_s445.jpg

STT 44 (**)

Name: STT44
Type: **
Constellation: Per
Coordinates: 02h42m13.13s / +42°41'57.20"

Components:
m1 m2 ρ θ Year
AB 8m5 9m0 1.4" 56° 2018
AC 8m5 8m3 87.2" 290° 2017
Robert Zebahl
152mm f/5.9, 129x, Bortle 6, SQM-L 19.2
AB: At 129x barely separable, at 150x separated quite clearly with a noticeable difference in brightness. The double star is located within Messier 34!

STT 59 (**)

Name: STT59
Type: **
Constellation: Per
Coordinates: 03h40m40.62s / +46°01'24.10"

Components:
m1 m2 ρ θ Year
7m9 8m8 2.8" 356° 2018
Robert Zebahl
70mm f/5.7, 67x, Bortle 6, SQM-L 19.2
Already separable at 67x, but very tight. Easy to separate at higher magnification. Difference in brightness clearly visible.

152mm f/5.9, 100x, Bortle 6-, SQM-L 19.0
Nicely separated, but close together. Primary component appears rather whitish, companion darker with a hint of orange.

STT 66 (**)

Name: STT66
Type: **
Constellation: Per
Coordinates: 03h52m04.69s / +40°47'50.70"

Components:
m1 m2 ρ θ Year
8m1 8m5 1.0" 146° 2018

../images/binary-star-orbits/STT66-orbit.jpg

Robert Zebahl
102mm f/11, 187x, Bortle 7-
2020-11-08: Already at 125x visible as figure '8'. Seeing was not good enough for higher magnifications.

STT 531 (**)

Name: STT531, 50 Per
Type: **
Constellation: Per
Coordinates: 04h07m34.35s / +38°04'28.30"

Components:
m1 m2 ρ θ Year
AB 7m3 9m7 2.7" 353° 2018
AC 7m3 8m8 225.1" 217° 2015

../images/binary-star-orbits/STT531-AB-orbit.jpg

Robert Zebahl
102mm f/11, 125x, Bortle 7-
AB: 2020-11-08: Clearly separated, relatively tight, fairly large difference in brightness. Primary component appeared white-yellowish with faint companion.

STTA 44 (**)

Name: STTA44
Type: **
Constellation: Per
Coordinates: 04h17m19.77s / +46°13'03.60"

Components:
m1 m2 ρ θ Year
7m1 8m0 58.6" 321° 2017
Robert Zebahl
B 16x70, Bortle 6, SQM-L 19.2
2020-11-07: Very nice sight, moderate separation & difference in brightness. Slightly yellow-orange & subtle bluish.