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 |
|
Discov num |
HDS2218 |
|
Comp |
AB |
|
Coord arcsec 2000 |
15 42 50.84 -61 46 37.8 |
|
| Date first |
1991 |
|
Date last |
2021 |
|
Obs |
8 |
|
| Pa first |
333 |
|
Pa last |
205.4 |
|
P.A. Now (θ) |
205.4° |
|
| Sep first |
0.1 |
|
Sep last |
0.065 |
|
Sep. Now (ρ) |
0.065" |
|
| Mag pri |
9.65 |
|
Mag sec |
10.64 |
|
delta mag (ΔM) |
0.99 |
|
Spectral class |
F5Vw... (yellow-white) |
|
| Pri motion ra |
+008 |
|
Sec motion ra |
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|
| Pri motion dec |
+021 |
|
Sec motion dec |
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|
| Notes |
O
W
(Orbital solution, ) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 139686 |
|
Constellation |
Triangulum Australe |
|
SAO |
253261 |
|
HIP |
76958 |
|
| Tycho2 |
9022-02550-1 |
|
HD |
139686 |
|
CP |
CP-61 5173 |
|
Distance |
188.68 |
|
| Distance ly |
615.47 |
|
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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