21593+4606 COU 2138
21h 59m 15.36s +46° 05' 30.8" P.A. 303.00 sep 0.1 mag 9.50,9.80 Sp K0 dist. 66.09 pc (215.59 l.y.)
| Coord 2000 |
21593+4606 |
|
Discov num |
COU2138 |
|
Comp |
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Coord arcsec 2000 |
21 59 15.36 +46 05 30.8 |
|
| Date first |
1982 |
|
Date last |
2014 |
|
Obs |
24 |
|
| Pa first |
3 |
|
Pa last |
303.1 |
|
P.A. Now (θ) |
303.1° |
|
| Sep first |
0.3 |
|
Sep last |
0.137 |
|
Sep. Now (ρ) |
0.137" |
|
| Mag pri |
9.50 |
|
Mag sec |
9.80 |
|
delta mag (ΔM) |
0.3 |
|
Spectral class |
K0 (yellow-orange) |
|
| Pri motion ra |
+227 |
|
Sec motion ra |
|
|
| Pri motion dec |
+091 |
|
Sec motion dec |
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| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
HIP |
108536 |
|
Tycho2 |
3605-02079-1 |
|
Gaia DR2 |
1975119639688397440 |
|
| BD |
BD+45 3750 |
|
Distance |
66.09 |
|
Distance ly |
215.59 |
|
ORBITAL ELEMENTS
| Period (P) | 45.44y | |
Periastron (T) | 2001.37y | |
Semi-major axis (a) | 0.238a | |
| Eccentricity (e) | 0.028 | |
Inclination (i) | 117.7° | |
Longitude of periastron (ω) | 154.3° | |
| Node (Ω) | 5.1° | |
Notes | | |
Reference | Doc2012c | |
| Equinox | 2000 | |
Last observation | 2007 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
204.5 |
0.196 |
| 2001 |
199.4 |
0.209 |
| 2002 |
194.9 |
0.220 |
| 2003 |
190.8 |
0.228 |
| 2004 |
186.8 |
0.231 |
| 2005 |
182.9 |
0.232 |
| 2006 |
179.0 |
0.228 |
| 2007 |
174.9 |
0.221 |
| 2008 |
170.4 |
0.211 |
| 2009 |
165.4 |
0.198 |
| 2010 |
159.6 |
0.182 |
| 2011 |
152.7 |
0.166 |
| 2012 |
144.3 |
0.149 |
| 2013 |
133.7 |
0.133 |
| 2014 |
120.6 |
0.120 |
| 2015 |
105.1 |
0.113 |
| 2016 |
88.6 |
0.113 |
| 2017 |
72.9 |
0.119 |
| 2018 |
59.5 |
0.132 |
| 2019 |
48.7 |
0.147 |
| 2020 |
40.1 |
0.165 |
| 2021 |
33.1 |
0.182 |
| 2022 |
27.4 |
0.198 |
| 2023 |
22.4 |
0.213 |
| 2024 |
18.1 |
0.225 |
| 2025 |
14.1 |
0.234 |
| 2026 |
10.4 |
0.241 |
| 2027 |
6.9 |
0.244 |
| 2028 |
3.4 |
0.243 |
| 2029 |
359.8 |
0.240 |
| 2030 |
356.1 |
0.233 |
|
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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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