08539+0149 A 2554 (HD 76050)
08h 53m 51.95s +01° 49' 28.0" P.A. 306.00 sep 0.1 mag 7.44,9.64 Sp F0 dist. 67.61 pc (220.54 l.y.)
| Coord 2000 |
08539+0149 |
|
Discov num |
A 2554 |
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Comp |
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Coord arcsec 2000 |
08 53 51.95 +01 49 28.0 |
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| Date first |
1913 |
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Date last |
2021 |
|
Obs |
26 |
|
| Pa first |
323 |
|
Pa last |
306.3 |
|
P.A. Now (θ) |
265.8° |
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| Sep first |
0.3 |
|
Sep last |
0.108 |
|
Sep. Now (ρ) |
0.116" |
|
| Mag pri |
7.44 |
|
Mag sec |
9.64 |
|
delta mag (ΔM) |
2.2 |
|
Spectral class |
F0 (yellow-white) |
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| Pri motion ra |
+010 |
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Sec motion ra |
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| Pri motion dec |
-040 |
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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
| Name |
HD 76050 |
|
Constellation |
Hydra |
|
SAO |
117242 |
|
HIP |
43676 |
|
| Tycho2 |
0213-00019-1 |
|
Gaia DR2 |
577669635274282752 |
|
HD |
76050 |
|
ADS |
7074 |
|
| BD |
BD+02 2088 |
|
Distance |
67.61 |
|
Distance ly |
220.54 |
|
ORBITAL ELEMENTS
| Period (P) | 43.86y | ± 0.8 |
Periastron (T) | 2021.18y | ± 0.3 |
Semi-major axis (a) | 0.21a | ± 0.005 |
| Eccentricity (e) | 0.502 | ± 0.03 |
Inclination (i) | 162.4° | ± 11.4 |
Longitude of periastron (ω) | 339.7° | ± 17.3 |
| Node (Ω) | 292.4° | ± 16.7 |
Notes | n | |
Reference | Tok2015c | |
| Equinox | 2000 | |
Last observation | 2014 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
129.5 |
0.314 |
| 2001 |
126.5 |
0.313 |
| 2002 |
123.5 |
0.311 |
| 2003 |
120.3 |
0.308 |
| 2004 |
117.2 |
0.304 |
| 2005 |
113.9 |
0.299 |
| 2006 |
110.5 |
0.293 |
| 2007 |
106.9 |
0.286 |
| 2008 |
103.2 |
0.278 |
| 2009 |
99.2 |
0.268 |
| 2010 |
94.9 |
0.257 |
| 2011 |
90.1 |
0.245 |
| 2012 |
84.9 |
0.232 |
| 2013 |
79.0 |
0.217 |
| 2014 |
72.2 |
0.202 |
| 2015 |
64.1 |
0.185 |
| 2016 |
54.5 |
0.167 |
| 2017 |
42.5 |
0.149 |
| 2018 |
27.3 |
0.132 |
| 2019 |
7.9 |
0.117 |
| 2020 |
343.9 |
0.107 |
| 2021 |
316.8 |
0.104 |
| 2022 |
289.8 |
0.107 |
| 2023 |
265.8 |
0.116 |
| 2024 |
245.8 |
0.129 |
| 2025 |
229.7 |
0.144 |
| 2026 |
216.7 |
0.159 |
| 2027 |
206.0 |
0.175 |
| 2028 |
197.1 |
0.191 |
| 2029 |
189.5 |
0.206 |
| 2030 |
182.9 |
0.220 |
|
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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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