21243+0343 A 2288 (HD 203789)

 
 
21h 24m 19.75s +03° 43' 00.8" P.A. 227.00 sep 0.4 mag 9.97,10.27 Sp G5 dist. 132.45 pc (432.05 l.y.)
 
 
Coord 2000 21243+0343 Discov num A  2288 Comp Coord arcsec 2000 21 24 19.75 +03 43 00.8
Date first 1910 Date last 2014 Obs 45
Pa first 215 Pa last 226.9 P.A. Now (θ) 218.5°
Sep first 0.3 Sep last 0.38 Sep. Now (ρ) 0.37"
Mag pri 9.97 Mag sec 10.27 delta mag (ΔM) 0.3 Spectral class G5 (yellow)
Pri motion ra +039 Sec motion ra
Pri motion dec -085 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 203789 Constellation Equuleus SAO 126772 HIP 105682
Tycho2 0533-01480-1 Gaia DR2 2692829771720784640 HD 203789 GC 29967
ADS 14942 BD BD+03 4562 Distance 132.45 Distance ly 432.05
 
 
ORBITAL ELEMENTS
 
 
Period (P)122.72y± 2.29 Periastron (T)1950.41y± 0.5 Semi-major axis (a)0.3a± 0.007
Eccentricity (e)0.659± 0.011 Inclination (i)139.4°± 1.8 Longitude of periastron (ω)86.1°± 3.3
Node (Ω)135.4°± 4.3 Notes ReferenceTok2015c
Equinox2000 Last observation2014 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 243.0 0.375
2001 241.9 0.376
2002 240.8 0.377
2003 239.8 0.377
2004 238.7 0.378
2005 237.6 0.378
2006 236.6 0.379
2007 235.5 0.379
2008 234.5 0.379
2009 233.4 0.379
2010 232.4 0.379
2011 231.3 0.379
2012 230.3 0.378
2013 229.2 0.378
2014 228.2 0.378
2015 227.1 0.377
2016 226.1 0.377
2017 225.0 0.376
2018 223.9 0.375
2019 222.9 0.374
2020 221.8 0.373
2021 220.7 0.372
2022 219.6 0.371
2023 218.5 0.370
2024 217.4 0.369
2025 216.3 0.367
2026 215.2 0.366
2027 214.0 0.364
2028 212.9 0.362
2029 211.7 0.361
2030 210.6 0.359


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



 
 


wds21243%2B0343b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic