21206+1310 HDS 3038 (HD 203220)

 
 
21h 20m 33.52s +13° 10' 01.3" P.A. 126.00 sep 0.1 mag 8.28,11.01 Sp G0 dist. 91.58 pc (298.73 l.y.)
 
 
Coord 2000 21206+1310 Discov num HDS3038 Comp Coord arcsec 2000 21 20 33.52 +13 10 01.3
Date first 1991 Date last 2018 Obs 9
Pa first 324 Pa last 125.6 P.A. Now (θ) 125.6°
Sep first 0.2 Sep last 0.142 Sep. Now (ρ) 0.142"
Mag pri 8.28 Mag sec 11.01 delta mag (ΔM) 2.73 Spectral class G0 (yellow)
Pri motion ra +051 Sec motion ra
Pri motion dec -038 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 203220 Constellation Pegasus SAO 107048 HIP 105371
Tycho2 1118-01137-1 Gaia DR2 1747168609836225792 HD 203220 BD BD+12 4602
Distance 91.58 Distance ly 298.73
 
 
ORBITAL ELEMENTS
 
 
Period (P)78.2y Periastron (T)2012.84y Semi-major axis (a)0.231a
Eccentricity (e)0.25 Inclination (i)91.1° Longitude of periastron (ω)274.3°
Node (Ω)126.1° Notes ReferenceTok2019c
Equinox Last observation2018 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 306.0 0.212
2001 305.9 0.204
2002 305.7 0.194
2003 305.6 0.183
2004 305.5 0.169
2005 305.3 0.154
2006 305.1 0.137
2007 304.8 0.119
2008 304.4 0.098
2009 303.8 0.077
2010 302.7 0.054
2011 300.0 0.031
2012 281.0 0.008
2013 137.2 0.017
2014 130.7 0.041
2015 128.9 0.064
2016 128.1 0.086
2017 127.6 0.107
2018 127.2 0.126
2019 127.0 0.144
2020 126.8 0.160
2021 126.6 0.174
2022 126.5 0.186
2023 126.4 0.196
2024 126.2 0.204
2025 126.1 0.211
2026 126.0 0.215
2027 125.9 0.218
2028 125.8 0.219
2029 125.8 0.219
2030 125.7 0.217


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



 
 


wds21206%2B1310a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic