17294-3831 B 342 (HD 158156)
17h 29m 25.62s -38° 31' 01.0" P.A. 115.00 sep 0.4 mag 6.82,7.57 Sp A2V dist. 117.51 pc (383.32 l.y.)
| Coord 2000 |
17294-3831 |
|
Discov num |
B 342 |
|
Comp |
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Coord arcsec 2000 |
17 29 25.62 -38 31 01.0 |
|
| Date first |
1925 |
|
Date last |
2016 |
|
Obs |
30 |
|
| Pa first |
72 |
|
Pa last |
115.4 |
|
P.A. Now (θ) |
115.4° |
|
| Sep first |
0.4 |
|
Sep last |
0.41 |
|
Sep. Now (ρ) |
0.41" |
|
| Mag pri |
6.82 |
|
Mag sec |
7.57 |
|
delta mag (ΔM) |
0.75 |
|
Spectral class |
A2V (white) |
|
| Pri motion ra |
+021 |
|
Sec motion ra |
+021 |
|
| Pri motion dec |
+007 |
|
Sec motion dec |
+007 |
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| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 158156 |
|
Constellation |
Scorpius |
|
SAO |
208870 |
|
HIP |
85589 |
|
| Tycho2 |
7883-00469-1 |
|
Gaia DR2 |
5962029684873161088 |
|
HD |
158156 |
|
HR |
6503 |
|
| GC |
23673 |
|
CD |
CD-3811927 |
|
CP |
CP-38 6862 |
|
Distance |
117.51 |
|
| Distance ly |
383.32 |
|
ORBITAL ELEMENTS
| Period (P) | 1236y | |
Periastron (T) | 2016y | |
Semi-major axis (a) | 1.38a | |
| Eccentricity (e) | 0.68 | |
Inclination (i) | 73° | |
Longitude of periastron (ω) | 38° | |
| Node (Ω) | 103° | |
Notes | | |
Reference | Hrt2013c | |
| Equinox | 2000 | |
Last observation | 2008 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
104.8 |
0.468 |
| 2001 |
105.3 |
0.463 |
| 2002 |
105.9 |
0.458 |
| 2003 |
106.5 |
0.452 |
| 2004 |
107.0 |
0.446 |
| 2005 |
107.6 |
0.440 |
| 2006 |
108.3 |
0.434 |
| 2007 |
108.9 |
0.427 |
| 2008 |
109.6 |
0.421 |
| 2009 |
110.3 |
0.413 |
| 2010 |
111.0 |
0.406 |
| 2011 |
111.7 |
0.398 |
| 2012 |
112.5 |
0.391 |
| 2013 |
113.3 |
0.383 |
| 2014 |
114.1 |
0.374 |
| 2015 |
115.0 |
0.366 |
| 2016 |
115.9 |
0.357 |
| 2017 |
116.8 |
0.348 |
| 2018 |
117.8 |
0.339 |
| 2019 |
118.9 |
0.330 |
| 2020 |
120.0 |
0.320 |
| 2021 |
121.2 |
0.311 |
| 2022 |
122.5 |
0.301 |
| 2023 |
123.8 |
0.292 |
| 2024 |
125.3 |
0.282 |
| 2025 |
126.8 |
0.272 |
| 2026 |
128.5 |
0.262 |
| 2027 |
130.3 |
0.253 |
| 2028 |
132.2 |
0.243 |
| 2029 |
134.3 |
0.234 |
| 2030 |
136.6 |
0.224 |
|
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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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