04205-0119 RST 4769 (HD 27516)
04h 20m 28.91s -01° 18' 58.8" P.A. 22.00 sep 0.3 mag 7.59,7.63 Sp A3 dist. 94.88 pc (309.5 l.y.)
| Coord 2000 |
04205-0119 |
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Discov num |
RST4769 |
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Comp |
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Coord arcsec 2000 |
04 20 28.91 -01 18 58.8 |
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| Date first |
1943 |
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Date last |
2019 |
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Obs |
26 |
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| Pa first |
19 |
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Pa last |
21.5 |
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P.A. Now (θ) |
19.6° |
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| Sep first |
0.3 |
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Sep last |
0.329 |
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Sep. Now (ρ) |
0.353" |
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| Mag pri |
7.59 |
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Mag sec |
7.63 |
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delta mag (ΔM) |
0.04 |
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Spectral class |
A3 (white) |
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| Pri motion ra |
-013 |
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Sec motion ra |
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| Pri motion dec |
-024 |
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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 27516 |
|
Constellation |
Eridanus |
|
SAO |
131126 |
|
HIP |
20257 |
|
| Tycho2 |
4727-02099-1 |
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HD |
27516 |
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GC |
5257 |
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BD |
BD-01 619 |
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| Distance |
94.88 |
|
Distance ly |
309.5 |
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ORBITAL ELEMENTS
| Period (P) | 77.57y | ± 0.39 |
Periastron (T) | 1997.21y | ± 0.44 |
Semi-major axis (a) | 0.2921a | ± 0.0031 |
| Eccentricity (e) | 0.3311 | ± 0.007 |
Inclination (i) | 97.34° | ± 0.52 |
Longitude of periastron (ω) | 23.5° | ± 2.7 |
| Node (Ω) | 198.28° | ± 0.48 |
Notes | n | |
Reference | Hrt2012a | |
| Equinox | 2000 | |
Last observation | 2010 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
189.5 |
0.130 |
| 2001 |
186.1 |
0.107 |
| 2002 |
180.7 |
0.082 |
| 2003 |
170.7 |
0.058 |
| 2004 |
147.8 |
0.037 |
| 2005 |
98.9 |
0.030 |
| 2006 |
60.6 |
0.045 |
| 2007 |
44.9 |
0.068 |
| 2008 |
37.4 |
0.093 |
| 2009 |
33.1 |
0.119 |
| 2010 |
30.3 |
0.143 |
| 2011 |
28.3 |
0.167 |
| 2012 |
26.8 |
0.189 |
| 2013 |
25.6 |
0.211 |
| 2014 |
24.6 |
0.231 |
| 2015 |
23.8 |
0.250 |
| 2016 |
23.1 |
0.267 |
| 2017 |
22.4 |
0.283 |
| 2018 |
21.9 |
0.298 |
| 2019 |
21.3 |
0.312 |
| 2020 |
20.9 |
0.324 |
| 2021 |
20.4 |
0.335 |
| 2022 |
20.0 |
0.344 |
| 2023 |
19.6 |
0.353 |
| 2024 |
19.2 |
0.360 |
| 2025 |
18.9 |
0.366 |
| 2026 |
18.5 |
0.371 |
| 2027 |
18.2 |
0.374 |
| 2028 |
17.9 |
0.377 |
| 2029 |
17.5 |
0.378 |
| 2030 |
17.2 |
0.378 |
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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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