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Doubles in session


Current system
01251+4537
A 939
HD 8528


Nearby doubles
14' : 01251+4523
SKF2461

18' : 01241+4522
HJ 2041

22' : 01270+4530
CVR 386

30' : 01277+4524
BU 999AB

46' : 01286+4509
A 941AB

51' : 01299+4547
COU1659

61' : 01211+4620
DAM1281

64' : 01207+4620
STF 112AB

69' : 01187+4529
WIS 26

70' : 01191+4509
BRT 79

79' : 01323+4559
BVD 18

82' : 01328+4538
HDS 202

82' : 01250+4415
TDS1872

87' : 01273+4414
ES 1410AB

92' : 01254+4405
A 1263

92' : 01190+4431
ES 1409

96' : 01340+4559
ARG 5

98' : 01177+4438
HJ 1077

101' : 01281+4712
UC 560

104' : 01320+4423
SLW 69

106' : 01219+4717
A 938AB

109' : 01281+4353
BAG 37

111' : 01221+4723
SKF2460

111' : 01351+4613
TDS1921AB

113' : 01201+4357
DA 8

115' : 01170+4654
LDS3256



Selections
Full WDS
Binocular doubles
Binary Systems
Triple Systems
Quadruple Systems
Multiple Systems
Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

01251+4537 A 939 (HD 8528)

 
 
01h 25m 06.75s +45° 36' 31.0" P.A. 202.00 sep 0.1 mag 8.94,9.09 Sp F0 dist. 180.18 pc (587.75 l.y.)
 
 
Coord 2000 01251+4537 Discov num A   939 Comp Coord arcsec 2000 01 25 06.75 +45 36 31.0
Date first 1905 Date last 2017 Obs 44
Pa first 264 Pa last 201.6 P.A. Now (θ) 218.7°
Sep first 0.2 Sep last 0.13 Sep. Now (ρ) 0.207"
Mag pri 8.94 Mag sec 9.09 delta mag (ΔM) 0.15 Spectral class F0 (yellow-white)
Pri motion ra -017 Sec motion ra
Pri motion dec -021 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 8528 Constellation Andromeda SAO 37184 HIP 6633
Tycho2 3265-00290-1 Gaia DR2 397299013346796800 HD 8528 ADS 1126
BD BD+44 296 Distance 180.18 Distance ly 587.75
 
 
ORBITAL ELEMENTS
 
 
Period (P)145.64y Periastron (T)1962.5y Semi-major axis (a)0.185a
Eccentricity (e)0.196 Inclination (i)19.4° Longitude of periastron (ω)273.6°
Node (Ω)143.5° Notesn ReferenceMsn2014b
Equinox2000 Last observation2010 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 170.1 0.191
2001 172.2 0.192
2002 174.3 0.193
2003 176.4 0.194
2004 178.5 0.195
2005 180.5 0.196
2006 182.5 0.197
2007 184.5 0.198
2008 186.5 0.199
2009 188.5 0.199
2010 190.5 0.200
2011 192.4 0.201
2012 194.4 0.201
2013 196.3 0.202
2014 198.2 0.203
2015 200.1 0.203
2016 202.0 0.204
2017 203.9 0.204
2018 205.8 0.205
2019 207.6 0.205
2020 209.5 0.205
2021 211.3 0.206
2022 213.2 0.206
2023 215.0 0.206
2024 216.8 0.207
2025 218.7 0.207
2026 220.5 0.207
2027 222.3 0.208
2028 224.1 0.208
2029 225.9 0.208
2030 227.7 0.208
2031 229.5 0.208
2032 231.3 0.208
2033 233.1 0.209
2034 234.9 0.209
2035 236.7 0.209
2036 238.5 0.209
2037 240.3 0.209
2038 242.1 0.209
2039 243.9 0.209
2040 245.7 0.209
2041 247.5 0.209
2042 249.3 0.209
2043 251.1 0.208
2044 252.9 0.208
2045 254.7 0.208
2046 256.5 0.208
2047 258.3 0.208
2048 260.2 0.207
2049 262.0 0.207
2050 263.8 0.207


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds01251%2B4537b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic