17308-3726 B 912 (HD 158409)
17h 30m 47.97s -37° 26' 12.9" P.A. 199.00 sep 0.3 mag 7.48,7.96 Sp A0/1(V) dist. 142.65 pc (465.32 l.y.)
Coord 2000 |
17308-3726 |
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Discov num |
B 912 |
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Comp |
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Coord arcsec 2000 |
17 30 47.97 -37 26 12.9 |
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Date first |
1927 |
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Date last |
2021 |
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Obs |
43 |
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Pa first |
259 |
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Pa last |
199.1 |
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P.A. Now (θ) |
198.6° |
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Sep first |
0.2 |
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Sep last |
0.275 |
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Sep. Now (ρ) |
0.295" |
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Mag pri |
7.48 |
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Mag sec |
7.96 |
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delta mag (ΔM) |
0.48 |
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Spectral class |
A0/1(V) (white) |
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Pri motion ra |
-003 |
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Sec motion ra |
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Pri motion dec |
-032 |
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Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 158409 |
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Constellation |
Scorpius |
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SAO |
208897 |
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HIP |
85700 |
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Tycho2 |
7387-00852-1 |
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Gaia DR2 |
5974203030900047232 |
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HD |
158409 |
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GC |
23694 |
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CD |
CD-3711639 |
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CP |
CP-37 7240 |
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Distance |
142.65 |
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Distance ly |
465.32 |
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ORBITAL ELEMENTS
Period (P) | 132.256y | |
Periastron (T) | 1944.75y | |
Semi-major axis (a) | 0.297a | |
Eccentricity (e) | 0.113 | |
Inclination (i) | 44.9° | |
Longitude of periastron (ω) | 116.2° | |
Node (Ω) | 226.8° | |
Notes | n | |
Reference | Msn2011c | |
Equinox | 2000 | |
Last observation | 2010 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
140.0 |
0.232 |
2001 |
143.1 |
0.233 |
2002 |
146.2 |
0.234 |
2003 |
149.3 |
0.236 |
2004 |
152.3 |
0.237 |
2005 |
155.3 |
0.239 |
2006 |
158.2 |
0.242 |
2007 |
161.1 |
0.244 |
2008 |
163.9 |
0.247 |
2009 |
166.6 |
0.250 |
2010 |
169.3 |
0.253 |
2011 |
171.9 |
0.256 |
2012 |
174.4 |
0.259 |
2013 |
176.9 |
0.263 |
2014 |
179.3 |
0.266 |
2015 |
181.7 |
0.270 |
2016 |
184.0 |
0.273 |
2017 |
186.2 |
0.276 |
2018 |
188.4 |
0.280 |
2019 |
190.5 |
0.283 |
2020 |
192.6 |
0.286 |
2021 |
194.7 |
0.289 |
2022 |
196.7 |
0.292 |
2023 |
198.6 |
0.295 |
2024 |
200.6 |
0.298 |
2025 |
202.4 |
0.300 |
2026 |
204.3 |
0.302 |
2027 |
206.1 |
0.305 |
2028 |
207.9 |
0.306 |
2029 |
209.7 |
0.308 |
2030 |
211.5 |
0.309 |
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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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