00569-5153 B 1418 (BW Phe)
00h 56m 55.38s -51° 52' 32.0" P.A. 86.00 sep 0.1 mag 9.77,10.02 Sp K3/4V dist. 40.63 pc (132.54 l.y.)
| Coord 2000 |
00569-5153 |
|
Discov num |
B 1418 |
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Comp |
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Coord arcsec 2000 |
00 56 55.38 -51 52 32.0 |
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| Date first |
1928 |
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Date last |
2021 |
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Obs |
14 |
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| Pa first |
100 |
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Pa last |
86.4 |
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P.A. Now (θ) |
93.3° |
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| Sep first |
0.3 |
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Sep last |
0.088 |
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Sep. Now (ρ) |
0.167" |
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| Mag pri |
9.77 |
|
Mag sec |
10.02 |
|
delta mag (ΔM) |
0.25 |
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Spectral class |
K3/4V (yellow-orange) |
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| Pri motion ra |
+096 |
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Sec motion ra |
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| Pri motion dec |
-007 |
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Sec motion dec |
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| Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Var name |
BW Phe |
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Constellation |
Phoenix |
|
SAO |
232234 |
|
HIP |
4448 |
|
| Tycho2 |
8037-00492-1 |
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Gaia DR2 |
4928347433108236416 |
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HD |
5578 |
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CP |
CP-52 125 |
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| Distance |
40.63 |
|
Distance ly |
132.54 |
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ORBITAL ELEMENTS
| Period (P) | 19.82y | ± 0.54 |
Periastron (T) | 2015.44y | ± 0.2 |
Semi-major axis (a) | 0.227a | ± 0.012 |
| Eccentricity (e) | 0.404 | ± 0.054 |
Inclination (i) | 85.8° | ± 0.6 |
Longitude of periastron (ω) | 323.3° | ± 7.3 |
| Node (Ω) | 279.8° | ± 0.5 |
Notes | | |
Reference | Tok2019c | |
| Equinox | | |
Last observation | 2018 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
342.3 |
0.020 |
| 2001 |
78.5 |
0.054 |
| 2002 |
89.3 |
0.108 |
| 2003 |
92.9 |
0.159 |
| 2004 |
94.9 |
0.203 |
| 2005 |
96.1 |
0.240 |
| 2006 |
97.1 |
0.268 |
| 2007 |
97.9 |
0.286 |
| 2008 |
98.7 |
0.294 |
| 2009 |
99.4 |
0.289 |
| 2010 |
100.2 |
0.270 |
| 2011 |
101.2 |
0.236 |
| 2012 |
102.6 |
0.183 |
| 2013 |
105.6 |
0.111 |
| 2014 |
130.5 |
0.023 |
| 2015 |
273.4 |
0.075 |
| 2016 |
279.0 |
0.137 |
| 2017 |
282.0 |
0.143 |
| 2018 |
285.8 |
0.110 |
| 2019 |
295.2 |
0.060 |
| 2020 |
14.1 |
0.018 |
| 2021 |
81.8 |
0.063 |
| 2022 |
90.2 |
0.118 |
| 2023 |
93.3 |
0.167 |
| 2024 |
95.1 |
0.210 |
| 2025 |
96.3 |
0.246 |
| 2026 |
97.3 |
0.272 |
| 2027 |
98.1 |
0.288 |
| 2028 |
98.8 |
0.294 |
| 2029 |
99.5 |
0.287 |
| 2030 |
100.3 |
0.265 |
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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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