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 |
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Discov num |
COU2138 |
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Comp |
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Coord arcsec 2000 |
21 59 15.36 +46 05 30.8 |
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Date first |
1982 |
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Date last |
2014 |
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Obs |
24 |
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Pa first |
3 |
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Pa last |
303.1 |
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P.A. Now (θ) |
303.1° |
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Sep first |
0.3 |
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Sep last |
0.137 |
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Sep. Now (ρ) |
0.137" |
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Mag pri |
9.50 |
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Mag sec |
9.80 |
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delta mag (ΔM) |
0.3 |
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Spectral class |
K0 (yellow-orange) |
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Pri motion ra |
+227 |
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Sec motion ra |
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Pri motion dec |
+091 |
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Sec motion dec |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Cygnus |
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HIP |
108536 |
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Tycho2 |
3605-02079-1 |
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Gaia DR2 |
1975119639688397440 |
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BD |
BD+45 3750 |
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Distance |
66.09 |
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Distance ly |
215.59 |
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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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