04028-3115 HDS 511 (HD 25623)
04h 02m 49.73s -31° 14' 33.3" P.A. 281.00 sep 0.1 mag 8.86,9.92 Sp F0V dist. 167.79 pc (547.33 l.y.)
| Coord 2000 |
04028-3115 |
|
Discov num |
HDS 511 |
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Comp |
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Coord arcsec 2000 |
04 02 49.73 -31 14 33.3 |
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| Date first |
1991 |
|
Date last |
2021 |
|
Obs |
8 |
|
| Pa first |
47 |
|
Pa last |
281.2 |
|
P.A. Now (θ) |
281.2° |
|
| Sep first |
0.1 |
|
Sep last |
0.065 |
|
Sep. Now (ρ) |
0.065" |
|
| Mag pri |
8.86 |
|
Mag sec |
9.92 |
|
delta mag (ΔM) |
1.06 |
|
Spectral class |
F0V (yellow-white) |
|
| Pri motion ra |
+009 |
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Sec motion ra |
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| Pri motion dec |
-004 |
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Sec motion dec |
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| Notes |
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Nature of this double is uncertain.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 25623 |
|
Constellation |
Eridanus |
|
SAO |
194714 |
|
HIP |
18879 |
|
| Tycho2 |
7030-00385-1 |
|
Gaia DR2 |
4883973858230368640 |
|
HD |
25623 |
|
CD |
CD-31 1658 |
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| CP |
CP-31 476 |
|
Distance |
167.79 |
|
Distance ly |
547.33 |
|
ORBITAL ELEMENTS
| Period (P) | 84.5y | |
Periastron (T) | 2020.83y | |
Semi-major axis (a) | 0.207a | |
| Eccentricity (e) | 0.293 | |
Inclination (i) | 117.4° | |
Longitude of periastron (ω) | 258.6° | |
| Node (Ω) | 174.9° | |
Notes | | |
Reference | Tok2019c | |
| Equinox | | |
Last observation | 2018 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
17.6 |
0.179 |
| 2001 |
15.1 |
0.182 |
| 2002 |
12.7 |
0.185 |
| 2003 |
10.4 |
0.187 |
| 2004 |
8.1 |
0.188 |
| 2005 |
5.8 |
0.189 |
| 2006 |
3.6 |
0.188 |
| 2007 |
1.3 |
0.187 |
| 2008 |
359.0 |
0.185 |
| 2009 |
356.6 |
0.182 |
| 2010 |
354.1 |
0.177 |
| 2011 |
351.5 |
0.172 |
| 2012 |
348.6 |
0.165 |
| 2013 |
345.5 |
0.157 |
| 2014 |
342.1 |
0.147 |
| 2015 |
338.1 |
0.137 |
| 2016 |
333.4 |
0.126 |
| 2017 |
327.8 |
0.113 |
| 2018 |
320.8 |
0.101 |
| 2019 |
311.9 |
0.089 |
| 2020 |
300.4 |
0.079 |
| 2021 |
285.9 |
0.071 |
| 2022 |
269.0 |
0.068 |
| 2023 |
251.7 |
0.070 |
| 2024 |
236.4 |
0.076 |
| 2025 |
224.0 |
0.086 |
| 2026 |
214.4 |
0.098 |
| 2027 |
207.0 |
0.110 |
| 2028 |
201.1 |
0.123 |
| 2029 |
196.3 |
0.136 |
| 2030 |
192.2 |
0.147 |
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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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