04559-3052 HDS 637
04h 55m 56.72s -30° 51' 31.0" P.A. 344.00 sep 0.2 mag 10.59,11.31 Sp K5 dist. 42.7 pc (139.29 l.y.)
| Coord 2000 |
04559-3052 |
|
Discov num |
HDS 637 |
|
Comp |
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Coord arcsec 2000 |
04 55 56.72 -30 51 31.0 |
|
| Date first |
1991 |
|
Date last |
2020 |
|
Obs |
10 |
|
| Pa first |
275 |
|
Pa last |
343.9 |
|
P.A. Now (θ) |
321.9° |
|
| Sep first |
0.3 |
|
Sep last |
0.155 |
|
Sep. Now (ρ) |
0.163" |
|
| Mag pri |
10.59 |
|
Mag sec |
11.31 |
|
delta mag (ΔM) |
0.72 |
|
Spectral class |
K5 (yellow-orange) |
|
| Pri motion ra |
+103 |
|
Sec motion ra |
|
|
| Pri motion dec |
-210 |
|
Sec motion dec |
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| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Caelum |
|
HIP |
22921 |
|
Tycho2 |
7046-01502-1 |
|
Gaia DR2 |
4874859319152950272 |
|
| CD |
CD-31 2107 |
|
Distance |
42.7 |
|
Distance ly |
139.29 |
|
ORBITAL ELEMENTS
| Period (P) | 41.04y | |
Periastron (T) | 2007.65y | |
Semi-major axis (a) | 0.303a | |
| Eccentricity (e) | 0.55 | |
Inclination (i) | 110.5° | |
Longitude of periastron (ω) | 112.3° | |
| Node (Ω) | 248.7° | |
Notes | | |
Reference | Tok2017c | |
| Equinox | 2000 | |
Last observation | 2016 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
255.1 |
0.313 |
| 2001 |
252.6 |
0.298 |
| 2002 |
249.7 |
0.276 |
| 2003 |
246.3 |
0.246 |
| 2004 |
241.6 |
0.206 |
| 2005 |
234.4 |
0.156 |
| 2006 |
218.7 |
0.095 |
| 2007 |
160.9 |
0.049 |
| 2008 |
95.4 |
0.088 |
| 2009 |
76.9 |
0.142 |
| 2010 |
67.8 |
0.178 |
| 2011 |
61.2 |
0.196 |
| 2012 |
55.3 |
0.203 |
| 2013 |
49.5 |
0.201 |
| 2014 |
43.6 |
0.195 |
| 2015 |
37.0 |
0.186 |
| 2016 |
29.8 |
0.175 |
| 2017 |
21.7 |
0.166 |
| 2018 |
12.6 |
0.157 |
| 2019 |
2.7 |
0.151 |
| 2020 |
352.2 |
0.149 |
| 2021 |
341.5 |
0.150 |
| 2022 |
331.3 |
0.155 |
| 2023 |
321.9 |
0.163 |
| 2024 |
313.6 |
0.174 |
| 2025 |
306.3 |
0.187 |
| 2026 |
300.0 |
0.201 |
| 2027 |
294.6 |
0.216 |
| 2028 |
289.9 |
0.232 |
| 2029 |
285.8 |
0.247 |
| 2030 |
282.2 |
0.262 |
|
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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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