09290+1917 COU 936 (HD 81899)
09h 29m 00.67s +19° 17' 18.6" P.A. 226.00 sep 1.0 mag 8.42,9.96 Sp F5 dist. 83.13 pc (271.17 l.y.)
| Coord 2000 |
09290+1917 |
|
Discov num |
COU 936 |
|
Comp |
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Coord arcsec 2000 |
09 29 00.67 +19 17 18.6 |
|
| Date first |
1973 |
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Date last |
2017 |
|
Obs |
20 |
|
| Pa first |
239 |
|
Pa last |
225.8 |
|
P.A. Now (θ) |
225.8° |
|
| Sep first |
0.5 |
|
Sep last |
0.956 |
|
Sep. Now (ρ) |
0.956" |
|
| Mag pri |
8.42 |
|
Mag sec |
9.96 |
|
delta mag (ΔM) |
1.54 |
|
Spectral class |
F5 (yellow-white) |
|
| Pri motion ra |
+026 |
|
Sec motion ra |
+026 |
|
| Pri motion dec |
+033 |
|
Sec motion dec |
+033 |
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| Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 81899 |
|
Constellation |
Leo |
|
SAO |
98596 |
|
HIP |
46501 |
|
| Tycho2 |
1406-01207-1 |
|
Gaia DR2 |
634098255638793600 |
|
HD |
81899 |
|
BD |
BD+19 2218 |
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| Distance |
83.13 |
|
Distance ly |
271.17 |
|
ORBITAL ELEMENTS
| Period (P) | 180.5y | ± 16.3 |
Periastron (T) | 1945.3y | ± 2.4 |
Semi-major axis (a) | 0.565a | ± 0.032 |
| Eccentricity (e) | 0.738 | ± 0.065 |
Inclination (i) | 108.6° | ± 5 |
Longitude of periastron (ω) | 8.4° | ± 7.7 |
| Node (Ω) | 45° | ± 1.9 |
Notes | | |
Reference | BAE2021 | |
| Equinox | | |
Last observation | | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
227.8 |
0.864 |
| 2001 |
227.6 |
0.871 |
| 2002 |
227.4 |
0.878 |
| 2003 |
227.3 |
0.885 |
| 2004 |
227.1 |
0.891 |
| 2005 |
226.9 |
0.898 |
| 2006 |
226.8 |
0.904 |
| 2007 |
226.6 |
0.909 |
| 2008 |
226.4 |
0.915 |
| 2009 |
226.3 |
0.920 |
| 2010 |
226.1 |
0.925 |
| 2011 |
225.9 |
0.930 |
| 2012 |
225.8 |
0.934 |
| 2013 |
225.6 |
0.938 |
| 2014 |
225.5 |
0.942 |
| 2015 |
225.3 |
0.946 |
| 2016 |
225.2 |
0.950 |
| 2017 |
225.0 |
0.953 |
| 2018 |
224.9 |
0.956 |
| 2019 |
224.7 |
0.959 |
| 2020 |
224.6 |
0.961 |
| 2021 |
224.4 |
0.964 |
| 2022 |
224.3 |
0.966 |
| 2023 |
224.1 |
0.968 |
| 2024 |
224.0 |
0.969 |
| 2025 |
223.8 |
0.971 |
| 2026 |
223.7 |
0.972 |
| 2027 |
223.5 |
0.973 |
| 2028 |
223.4 |
0.974 |
| 2029 |
223.2 |
0.974 |
| 2030 |
223.1 |
0.975 |
|
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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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