00095+1907 COU 247 (HD 489)

 
 
00h 09m 28.15s +19° 06' 56.8" P.A. 213.00 sep 0.3 mag 8.29,9.98 Sp G3V dist. 68.12 pc (222.21 l.y.)
 
 
Coord 2000 00095+1907 Discov num COU 247 Comp Coord arcsec 2000 00 09 28.15 +19 06 56.8
Date first 1967 Date last 2017 Obs 37
Pa first 31 Pa last 213.2 P.A. Now (θ) 213.2°
Sep first 0.4 Sep last 0.32 Sep. Now (ρ) 0.32"
Mag pri 8.29 Mag sec 9.98 delta mag (ΔM) 1.69 Spectral class G3V (yellow)
Pri motion ra +267 Sec motion ra
Pri motion dec +024 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 489 Constellation Pegasus SAO 91742 HIP 768
Tycho2 1181-00051-1 Gaia DR2 2798013314642147968 HD 489 GC 157
BD BD+18 3 Distance 68.12 Distance ly 222.21
 
 
ORBITAL ELEMENTS
 
 
Period (P)159.51y Periastron (T)2005.8y Semi-major axis (a)0.543a
Eccentricity (e)0.309 Inclination (i)137° Longitude of periastron (ω)103.4°
Node (Ω)21.1° Notes ReferenceDoc2012i
Equinox2000 Last observation2010 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 307.7 0.286
2001 301.9 0.281
2002 296.0 0.278
2003 289.9 0.276
2004 283.8 0.276
2005 277.8 0.278
2006 271.9 0.282
2007 266.2 0.287
2008 260.6 0.293
2009 255.4 0.301
2010 250.5 0.310
2011 245.8 0.320
2012 241.4 0.330
2013 237.3 0.341
2014 233.4 0.351
2015 229.8 0.362
2016 226.4 0.373
2017 223.1 0.384
2018 220.1 0.394
2019 217.2 0.404
2020 214.4 0.414
2021 211.7 0.423
2022 209.2 0.432
2023 206.8 0.440
2024 204.4 0.448
2025 202.2 0.455
2026 200.0 0.462
2027 197.8 0.468
2028 195.7 0.474
2029 193.7 0.479
2030 191.7 0.484


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



 
 


wds00095%2B1907b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic