20311+3333 COU1962 (V2425 Cyg)

 
 
20h 31m 07.72s +33 32' 33.6" P.A. 121.50 sep 0.1 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
2012
Obs
63
Pa first
123
Pa last
292
P.A. Now (θ)
121.5°
Sep first
0.1
Sep last
0.2
Sep. Now (ρ)
0.12"
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
 
 
Precise pa
292.4
Precise sep
0.216
Var name
V2425 Cyg
Constellation
Cygnus
SAO
70137
HIP
101227
Tycho2
2689-00268-1
Gaia DR2
1863872427589249408
BD
BD+33 3930
Distance
48.85
Distance ly
159.35
last precise pa
292.4
last precise sep
0.216
 
 
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 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2009
label rho theta
2000 0.110 115.5
2001 0.119 126.4
2002 0.101 138.6
2003 0.077 157.9
2004 0.062 190.6
2005 0.070 227.2
2006 0.095 250.3
2007 0.125 263.0
2008 0.155 270.7
2009 0.183 276.0
2010 0.207 280.0
2011 0.226 283.2
2012 0.239 286.0
2013 0.245 288.6
2014 0.242 291.1
2015 0.229 293.8
2016 0.203 296.9
2017 0.160 301.5
2018 0.095 311.0
2019 0.026 28.8
2020 0.089 108.6
2021 0.120 121.5
2022 0.111 132.4
2023 0.088 147.6
2024 0.067 173.7
2025 0.064 211.4
2026 0.082 241.3
2027 0.111 257.9
2028 0.141 267.5
2029 0.170 273.8
2030 0.196 278.3


 
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
 
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20311+3333 COU1962 2006 55 76 0.1 9.03 9.51 K0 NOD 203107.72+333233.6
20311+3333 COU1962 2007 56 270 0.1 9.03 9.51 K0 NOD 203107.72+333233.6
20311+3333 COU1962 2008 58 93 0.2 9.03 9.51 K0 NOD 203107.72+333233.6

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