20311+3333 COU 1962 (V2425 Cyg)

 
 
20h 31m 07.72s +33° 32' 33.6" P.A. 294.00 sep 0.3 mag 9.03,9.51 Sp K0 dist. 48.85 pc (159.35 l.y.)
 
 
Coord 2000 20311+3333 Discov num COU1962 Comp Coord arcsec 2000 20 31 07.72 +33 32 33.6
Date first 1980 Date last 2014 Obs 64
Pa first 123 Pa last 293.5 P.A. Now (θ) 147.6°
Sep first 0.1 Sep last 0.261 Sep. Now (ρ) 0.088"
Mag pri 9.03 Mag sec 9.51 delta mag (ΔM) 0.48 Spectral class K0 (yellow-orange)
Pri motion ra +073 Sec motion ra
Pri motion dec +086 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name V2425 Cyg Constellation Cygnus HIP 101227 Tycho2 2689-00268-1
Gaia DR2 1863872427589249408 BD BD+33 3930 Distance 48.85 Distance ly 159.35
 
 
ORBITAL ELEMENTS
 
 
Period (P)20.465y± 0.067 Periastron (T)1999.128y± 0.177 Semi-major axis (a)0.199a± 0.004
Eccentricity (e)0.516± 0.013 Inclination (i)75.4°± 0.7 Longitude of periastron (ω)307.1°± 2.2
Node (Ω)116°± 0.7 Notesn ReferenceTok2021c
Equinox2000 Last observation2009 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 115.5 0.110
2001 126.4 0.119
2002 138.6 0.101
2003 157.9 0.077
2004 190.6 0.062
2005 227.2 0.070
2006 250.3 0.095
2007 263.0 0.125
2008 270.7 0.155
2009 276.0 0.183
2010 280.0 0.207
2011 283.2 0.226
2012 286.0 0.239
2013 288.6 0.245
2014 291.1 0.242
2015 293.8 0.229
2016 296.9 0.203
2017 301.5 0.160
2018 311.0 0.095
2019 28.8 0.026
2020 108.6 0.089
2021 121.5 0.120
2022 132.4 0.111
2023 147.6 0.088
2024 173.7 0.067
2025 211.4 0.064
2026 241.3 0.082
2027 257.9 0.111
2028 267.5 0.141
2029 273.8 0.170
2030 278.3 0.196


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


 
  


wds20311%2B3333c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic