| 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 | |||||||||||
| 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 |
| 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 | Grade | 2 | (1=Definitive, 9=Indet.) | ||
| Equinox | 2000 | Last observation | 2009 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st. |
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|
|
|
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|
|
 Measures: green=micrometric, blue=interferometric, purple=photographic |
|
| 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 |