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 |
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Discov num |
COU1962 |
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Comp |
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Coord arcsec 2000 |
20 31 07.72 +33 32 33.6 |
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Date first |
1980 |
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Date last |
2014 |
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Obs |
64 |
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Pa first |
123 |
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Pa last |
293.5 |
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P.A. Now (θ) |
147.6° |
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Sep first |
0.1 |
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Sep last |
0.261 |
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Sep. Now (ρ) |
0.088" |
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Mag pri |
9.03 |
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Mag sec |
9.51 |
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delta mag (ΔM) |
0.48 |
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Spectral class |
K0 (yellow-orange) |
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Pri motion ra |
+073 |
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Sec motion ra |
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Pri motion dec |
+086 |
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Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Var name |
V2425 Cyg |
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Constellation |
Cygnus |
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HIP |
101227 |
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Tycho2 |
2689-00268-1 |
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Gaia DR2 |
1863872427589249408 |
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BD |
BD+33 3930 |
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Distance |
48.85 |
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Distance ly |
159.35 |
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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 |
Notes | n | |
Reference | Tok2021c | |
Equinox | 2000 | |
Last observation | 2009 | |
Grade | 2 | (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 |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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