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 |
|
|
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 |
|
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 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|