09544+3041 COU 1258 (HD 85708)
09h 54m 24.02s +30° 41' 18.1" P.A. 230.00 sep 0.2 mag 9.92,9.13 Sp F5 dist. 146.63 pc (478.31 l.y.)
Coord 2000 |
09544+3041 |
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Discov num |
COU1258 |
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Comp |
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Coord arcsec 2000 |
09 54 24.02 +30 41 18.1 |
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Date first |
1975 |
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Date last |
2015 |
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Obs |
14 |
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Pa first |
52 |
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Pa last |
229.8 |
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P.A. Now (θ) |
229.8° |
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Sep first |
0.2 |
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Sep last |
0.171 |
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Sep. Now (ρ) |
0.171" |
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Mag pri |
9.92 |
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Mag sec |
9.13 |
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delta mag (ΔM) |
0.79 |
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Spectral class |
F5 (yellow-white) |
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Pri motion ra |
-026 |
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Sec motion ra |
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Pri motion dec |
-038 |
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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
Name |
HD 85708 |
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Constellation |
Leo |
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SAO |
61748 |
|
HIP |
48572 |
|
Tycho2 |
2502-00804-1 |
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Gaia DR2 |
744874185280916224 |
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HD |
85708 |
|
BD |
BD+31 2066 |
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Distance |
146.63 |
|
Distance ly |
478.31 |
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ORBITAL ELEMENTS
Period (P) | 96y | ± 13 |
Periastron (T) | 2096y | ± 39 |
Semi-major axis (a) | 0.198a | ± 0.017 |
Eccentricity (e) | 0.237 | ± 0.092 |
Inclination (i) | 85.29° | ± 0.87 |
Longitude of periastron (ω) | 259° | ± 44 |
Node (Ω) | 232° | ± 26 |
Notes | | |
Reference | Hor2020 | |
Equinox | 2000 | |
Last observation | 2015 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
74.9 |
0.031 |
2001 |
96.7 |
0.018 |
2002 |
159.4 |
0.013 |
2003 |
200.6 |
0.024 |
2004 |
213.4 |
0.039 |
2005 |
219.1 |
0.054 |
2006 |
222.3 |
0.069 |
2007 |
224.3 |
0.083 |
2008 |
225.8 |
0.097 |
2009 |
226.8 |
0.111 |
2010 |
227.7 |
0.123 |
2011 |
228.4 |
0.135 |
2012 |
229.0 |
0.145 |
2013 |
229.5 |
0.155 |
2014 |
230.0 |
0.164 |
2015 |
230.4 |
0.172 |
2016 |
230.8 |
0.178 |
2017 |
231.1 |
0.184 |
2018 |
231.5 |
0.189 |
2019 |
231.8 |
0.194 |
2020 |
232.1 |
0.197 |
2021 |
232.4 |
0.199 |
2022 |
232.7 |
0.201 |
2023 |
233.0 |
0.201 |
2024 |
233.3 |
0.201 |
2025 |
233.6 |
0.201 |
2026 |
233.9 |
0.199 |
2027 |
234.2 |
0.197 |
2028 |
234.5 |
0.194 |
2029 |
234.8 |
0.191 |
2030 |
235.1 |
0.187 |
2031 |
235.5 |
0.183 |
2032 |
235.8 |
0.178 |
2033 |
236.2 |
0.172 |
2034 |
236.6 |
0.166 |
2035 |
237.0 |
0.160 |
2036 |
237.5 |
0.153 |
2037 |
238.0 |
0.146 |
2038 |
238.6 |
0.138 |
2039 |
239.3 |
0.131 |
2040 |
240.0 |
0.123 |
2041 |
240.8 |
0.114 |
2042 |
241.8 |
0.106 |
2043 |
243.0 |
0.097 |
2044 |
244.4 |
0.088 |
2045 |
246.1 |
0.078 |
2046 |
248.2 |
0.069 |
2047 |
251.0 |
0.060 |
2048 |
254.9 |
0.051 |
2049 |
260.4 |
0.042 |
2050 |
268.9 |
0.033 |
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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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