20311+3333 COU1962 (V2425 Cyg)

 
 
20h 31m 07.72s +33 32' 33.6" P.A. 255.6 sep 0.11 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
2008
Obs
60
Pa first
123
Pa last
277
P.A. Now (θ)
255.6°
Sep first
0.1
Sep last
0.2
Sep. Now (ρ)
0.11"
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
277.4
Precise sep
0.203
Var name
V2425 Cyg
Constellation
Cygnus
SAO
70137
HIP
101227
Tycho2
2689-00268-1
Gaia DR2
27589249408
BD
BD+33 3930
Distance
48.85
Distance ly
159.35
last precise pa
277.4
last precise sep
0.203
 
 
ORBITAL ELEMENTS
 
 
Period (P)33.13y Periastron (T)1979.57y Semi-major axis (a)0.213a
Eccentricity (e)0.189 Inclination (i)71.5° Longitude of periastron (ω)25°
Node (Ω)109.9° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2005
label rho theta
2000 0.155 314.1
2001 0.129 321.7
2002 0.103 333.2
2003 0.082 351.6
2004 0.071 19.0
2005 0.077 48.3
2006 0.096 69.6
2007 0.119 83.0
2008 0.142 92.0
2009 0.161 98.7
2010 0.173 104.2
2011 0.176 109.2
2012 0.169 114.3
2013 0.152 120.2
2014 0.128 128.1
2015 0.099 140.2
2016 0.071 162.4
2017 0.060 200.5
2018 0.076 236.1
2019 0.105 255.6
2020 0.137 266.3
2021 0.167 273.1
2022 0.193 277.8
2023 0.214 281.5
2024 0.231 284.6
2025 0.242 287.3
2026 0.248 289.9
2027 0.249 292.4
2028 0.244 294.9
2029 0.235 297.6
2030 0.222 300.5

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






wds20311%2B3333a.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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