- Double Stars (Per) -

And (43) Cet (1) Del (4) Lib (1) Per (27) UMi (1)
Aql (9) CMa (2) Dra (11) LMi (6) Psc (10) Vir (9)
Ari (8) Cnc (10) Equ (5) Lyn (18) Pup (1) Vul (3)
Aur (28) Com (8) Eri (1) Lyr (11) Ser (3)
Boo (20) CrB (4) Gem (22) Mon (1) Sex (2)
Cam (11) Crv (1) Her (16) Oph (1) Tau (11)
Cas (17) CVn (14) Hya (4) Ori (9) Tri (4)
Cep (13) Cyg (26) Leo (24) Peg (16) UMa (38)

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.

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.

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 20.3" 178° 2018
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.

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.

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.

STF 331 (**)

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

Components:
m1 m2 ρ θ Year
5m2 6m2 11.8" 86° 2018
Robert Zebahl
63mm f/13.3, 46x
Easy to separate with relatively large difference in brightness.

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.

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° 2018
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 6.9" 56° 2016
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.