01251+4537 A 939 (HD 8528)

 
 
01h 25m 06.75s +45 36' 31.0" P.A. 197.00 sep 0.2 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 2014 Obs 40
Pa first 264 Pa last 196.6 P.A. Now (θ) 215°
Sep first 0.2 Sep last 0.198 Sep. Now (ρ) 0.206"
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


 
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