09477+2036 COU 284 (HD 84739)
09h 47m 42.79s +20° 36' 17.2" P.A. 149.00 sep 0.1 mag 8.15,8.31 Sp F0 dist. 87.03 pc (283.89 l.y.)
| Coord 2000 |
09477+2036 |
|
Discov num |
COU 284 |
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Comp |
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Coord arcsec 2000 |
09 47 42.79 +20 36 17.2 |
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| Date first |
1968 |
|
Date last |
2013 |
|
Obs |
38 |
|
| Pa first |
72 |
|
Pa last |
149 |
|
P.A. Now (θ) |
149° |
|
| Sep first |
0.2 |
|
Sep last |
0.139 |
|
Sep. Now (ρ) |
0.139" |
|
| Mag pri |
8.15 |
|
Mag sec |
8.31 |
|
delta mag (ΔM) |
0.16 |
|
Spectral class |
F0 (yellow-white) |
|
| Pri motion ra |
+077 |
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Sec motion ra |
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| Pri motion dec |
-010 |
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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 84739 |
|
Constellation |
Leo |
|
SAO |
81017 |
|
HIP |
48051 |
|
| Tycho2 |
1417-00337-1 |
|
Gaia DR2 |
639683671628307456 |
|
HD |
84739 |
|
GC |
13492 |
|
| BD |
BD+21 2108 |
|
Distance |
87.03 |
|
Distance ly |
283.89 |
|
ORBITAL ELEMENTS
| Period (P) | 261.81y | |
Periastron (T) | 2008.85y | |
Semi-major axis (a) | 0.27a | |
| Eccentricity (e) | 0.891 | |
Inclination (i) | 122.2° | |
Longitude of periastron (ω) | 83.9° | |
| Node (Ω) | 11.3° | |
Notes | | |
Reference | Doc2019c | |
| Equinox | 2000 | |
Last observation | 2014 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
39.0 |
0.100 |
| 2001 |
36.4 |
0.095 |
| 2002 |
33.6 |
0.089 |
| 2003 |
30.3 |
0.083 |
| 2004 |
26.4 |
0.075 |
| 2005 |
21.5 |
0.067 |
| 2006 |
15.1 |
0.056 |
| 2007 |
5.3 |
0.043 |
| 2008 |
345.0 |
0.027 |
| 2009 |
278.0 |
0.016 |
| 2010 |
218.2 |
0.029 |
| 2011 |
200.5 |
0.046 |
| 2012 |
191.9 |
0.060 |
| 2013 |
186.3 |
0.072 |
| 2014 |
182.3 |
0.082 |
| 2015 |
179.0 |
0.091 |
| 2016 |
176.4 |
0.099 |
| 2017 |
174.1 |
0.107 |
| 2018 |
172.1 |
0.113 |
| 2019 |
170.3 |
0.119 |
| 2020 |
168.7 |
0.125 |
| 2021 |
167.2 |
0.131 |
| 2022 |
165.8 |
0.136 |
| 2023 |
164.5 |
0.140 |
| 2024 |
163.3 |
0.145 |
| 2025 |
162.2 |
0.149 |
| 2026 |
161.2 |
0.154 |
| 2027 |
160.2 |
0.158 |
| 2028 |
159.2 |
0.161 |
| 2029 |
158.3 |
0.165 |
| 2030 |
157.4 |
0.169 |
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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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