15428-6147 HDS 2218 AB (HD 139686)
15h 42m 50.84s -61° 46' 37.8" P.A. 205.00 sep 0.1 mag 9.65,10.64 Sp F5Vw... dist. 188.68 pc (615.47 l.y.)
Coord 2000 |
15428-6147 |
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Discov num |
HDS2218 |
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Comp |
AB |
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Coord arcsec 2000 |
15 42 50.84 -61 46 37.8 |
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Date first |
1991 |
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Date last |
2021 |
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Obs |
8 |
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Pa first |
333 |
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Pa last |
205.4 |
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P.A. Now (θ) |
205.4° |
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Sep first |
0.1 |
|
Sep last |
0.065 |
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Sep. Now (ρ) |
0.065" |
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Mag pri |
9.65 |
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Mag sec |
10.64 |
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delta mag (ΔM) |
0.99 |
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Spectral class |
F5Vw... (yellow-white) |
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Pri motion ra |
+008 |
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Sec motion ra |
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Pri motion dec |
+021 |
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Sec motion dec |
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Notes |
O
W
(Orbital solution, ) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 139686 |
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Constellation |
Triangulum Australe |
|
SAO |
253261 |
|
HIP |
76958 |
|
Tycho2 |
9022-02550-1 |
|
HD |
139686 |
|
CP |
CP-61 5173 |
|
Distance |
188.68 |
|
Distance ly |
615.47 |
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ORBITAL ELEMENTS
Period (P) | 60y | |
Periastron (T) | 2024.67y | |
Semi-major axis (a) | 0.114a | |
Eccentricity (e) | 0.426 | |
Inclination (i) | 143.2° | |
Longitude of periastron (ω) | 287.9° | |
Node (Ω) | 72.3° | |
Notes | | |
Reference | Tok2020g | |
Equinox | 2000 | |
Last observation | 2020 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
304.0 |
0.137 |
2001 |
300.9 |
0.137 |
2002 |
297.9 |
0.137 |
2003 |
294.9 |
0.137 |
2004 |
291.9 |
0.136 |
2005 |
288.9 |
0.136 |
2006 |
285.8 |
0.135 |
2007 |
282.6 |
0.133 |
2008 |
279.4 |
0.132 |
2009 |
276.1 |
0.129 |
2010 |
272.6 |
0.127 |
2011 |
269.1 |
0.124 |
2012 |
265.3 |
0.121 |
2013 |
261.3 |
0.117 |
2014 |
257.0 |
0.112 |
2015 |
252.3 |
0.107 |
2016 |
247.2 |
0.102 |
2017 |
241.4 |
0.095 |
2018 |
234.7 |
0.089 |
2019 |
226.8 |
0.081 |
2020 |
217.4 |
0.073 |
2021 |
205.7 |
0.066 |
2022 |
191.1 |
0.059 |
2023 |
173.5 |
0.055 |
2024 |
153.7 |
0.053 |
2025 |
134.0 |
0.055 |
2026 |
116.5 |
0.059 |
2027 |
101.8 |
0.065 |
2028 |
89.8 |
0.072 |
2029 |
79.6 |
0.078 |
2030 |
71.0 |
0.083 |
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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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