15347+2655 COU 798
15h 34m 40.64s +26° 54' 42.8" P.A. 211.00 sep 0.2 mag 9.50,9.80 Sp G0+G2
Coord 2000 |
15347+2655 |
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Discov num |
COU 798 |
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Comp |
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Coord arcsec 2000 |
15 34 40.64 +26 54 42.8 |
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Date first |
1972 |
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Date last |
2014 |
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Obs |
41 |
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Pa first |
31 |
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Pa last |
211.3 |
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P.A. Now (θ) |
211.3° |
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Sep first |
0.2 |
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Sep last |
0.238 |
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Sep. Now (ρ) |
0.238" |
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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 |
G0+G2 (yellow/yellow) |
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Pri motion ra |
-047 |
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Sec motion ra |
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Pri motion dec |
+036 |
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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
Constellation |
Corona Borealis |
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Tycho2 |
2029-00232-1 |
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Gaia DR2 |
1222703457470672128 |
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ORBITAL ELEMENTS
Period (P) | 154.7y | ± 1.5 |
Periastron (T) | 1983.37y | ± 0.05 |
Semi-major axis (a) | 0.259a | ± 0.004 |
Eccentricity (e) | 0.357 | ± 0.007 |
Inclination (i) | 66.7° | ± 2.5 |
Longitude of periastron (ω) | 24.7° | ± 10 |
Node (Ω) | 46.1° | ± 4 |
Notes | n | |
Reference | Doc2010h | |
Equinox | 2000 | |
Last observation | 2007 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
159.2 |
0.088 |
2001 |
166.2 |
0.094 |
2002 |
172.3 |
0.101 |
2003 |
177.5 |
0.109 |
2004 |
182.1 |
0.117 |
2005 |
186.0 |
0.126 |
2006 |
189.4 |
0.135 |
2007 |
192.3 |
0.144 |
2008 |
195.0 |
0.153 |
2009 |
197.3 |
0.162 |
2010 |
199.4 |
0.171 |
2011 |
201.3 |
0.179 |
2012 |
203.0 |
0.188 |
2013 |
204.6 |
0.196 |
2014 |
206.0 |
0.205 |
2015 |
207.3 |
0.213 |
2016 |
208.6 |
0.220 |
2017 |
209.7 |
0.228 |
2018 |
210.8 |
0.235 |
2019 |
211.8 |
0.242 |
2020 |
212.7 |
0.249 |
2021 |
213.6 |
0.256 |
2022 |
214.5 |
0.262 |
2023 |
215.3 |
0.268 |
2024 |
216.1 |
0.274 |
2025 |
216.9 |
0.280 |
2026 |
217.6 |
0.285 |
2027 |
218.3 |
0.290 |
2028 |
218.9 |
0.295 |
2029 |
219.6 |
0.300 |
2030 |
220.2 |
0.304 |
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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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