00516+2237 A 1808 (HD 4934)

 
 
00h 51m 36.99s +22° 37' 24.4" P.A. 195.00 sep 0.2 mag 7.93,8.22 Sp K0III dist. 254.45 pc (830.02 l.y.)
 
 
Coord 2000 00516+2237 Discov num A  1808 Comp Coord arcsec 2000 00 51 36.99 +22 37 24.4
Date first 1908 Date last 2012 Obs 57
Pa first 209 Pa last 194.5 P.A. Now (θ) 208.6°
Sep first 0.2 Sep last 0.197 Sep. Now (ρ) 0.212"
Mag pri 7.93 Mag sec 8.22 delta mag (ΔM) 0.29 Spectral class K0III (yellow-orange)
Pri motion ra +012 Sec motion ra
Pri motion dec +002 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 4934 Constellation Andromeda SAO 74322 HIP 4030
Tycho2 1739-00186-1 Gaia DR2 2802279419757750144 HD 4934 GC 1028
ADS 701 BD BD+21 111 Distance 254.45 Distance ly 830.02
 
 
ORBITAL ELEMENTS
 
 
Period (P)112.4y Periastron (T)1975.99y Semi-major axis (a)0.121a
Eccentricity (e)0.827 Inclination (i)17.8° Longitude of periastron (ω)231.9°
Node (Ω)163.1° Notesn ReferenceDoc2005b
Equinox2000 Last observation2004 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 193.0 0.167
2001 193.9 0.170
2002 194.8 0.173
2003 195.6 0.176
2004 196.4 0.179
2005 197.2 0.182
2006 197.9 0.184
2007 198.6 0.187
2008 199.4 0.189
2009 200.0 0.191
2010 200.7 0.194
2011 201.4 0.196
2012 202.0 0.197
2013 202.7 0.199
2014 203.3 0.201
2015 203.9 0.203
2016 204.5 0.204
2017 205.1 0.205
2018 205.7 0.207
2019 206.3 0.208
2020 206.9 0.209
2021 207.4 0.210
2022 208.0 0.211
2023 208.6 0.212
2024 209.1 0.212
2025 209.7 0.213
2026 210.2 0.213
2027 210.8 0.214
2028 211.3 0.214
2029 211.9 0.214
2030 212.4 0.215


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.


 
  


wds00516%2B2237a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic