17539-3445 B 1871 (V906 Sco)
17h 53m 54.77s -34° 45' 09.8" P.A. 95.00 sep 0.3 mag 6.50,7.30 Sp B9V+B9V dist. 315.46 pc (1029.03 l.y.)
| Coord 2000 |
17539-3445 |
|
Discov num |
B 1871 |
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Comp |
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Coord arcsec 2000 |
17 53 54.77 -34 45 09.8 |
|
| Date first |
1929 |
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Date last |
2021 |
|
Obs |
17 |
|
| Pa first |
90 |
|
Pa last |
94.9 |
|
P.A. Now (θ) |
94.9° |
|
| Sep first |
0.3 |
|
Sep last |
0.298 |
|
Sep. Now (ρ) |
0.298" |
|
| Mag pri |
6.50 |
|
Mag sec |
7.30 |
|
delta mag (ΔM) |
0.8 |
|
Spectral class |
B9V+B9V (blue-white/blue-white) |
|
| Pri motion ra |
+007 |
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Sec motion ra |
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| Pri motion dec |
-010 |
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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
| Var name |
V906 Sco |
|
Constellation |
Scorpius |
|
SAO |
209428 |
|
HIP |
87616 |
|
| Tycho2 |
7386-00562-1 |
|
Gaia DR2 |
4040825529908227072 |
|
HD |
162724 |
|
HR |
6662 |
|
| GC |
24314 |
|
CD |
CD-3412226 |
|
Distance |
315.46 |
|
Distance ly |
1029.03 |
|
ORBITAL ELEMENTS
| Period (P) | 34.71y | ± 1.13 |
Periastron (T) | 1974.1y | ± 1.2 |
Semi-major axis (a) | 0.172a | ± 0.015 |
| Eccentricity (e) | 0.001 | ± 0.002 |
Inclination (i) | 80.5° | ± 6.8 |
Longitude of periastron (ω) | 183° | ± 9.7 |
| Node (Ω) | 103° | ± 9.7 |
Notes | n | |
Reference | Zas2009 | |
| Equinox | 2000 | |
Last observation | | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
202.1 |
0.029 |
| 2001 |
244.9 |
0.045 |
| 2002 |
261.0 |
0.070 |
| 2003 |
268.6 |
0.096 |
| 2004 |
273.0 |
0.119 |
| 2005 |
276.0 |
0.139 |
| 2006 |
278.4 |
0.155 |
| 2007 |
280.3 |
0.166 |
| 2008 |
282.1 |
0.171 |
| 2009 |
283.8 |
0.171 |
| 2010 |
285.6 |
0.166 |
| 2011 |
287.6 |
0.155 |
| 2012 |
289.9 |
0.140 |
| 2013 |
292.9 |
0.120 |
| 2014 |
297.2 |
0.097 |
| 2015 |
304.5 |
0.071 |
| 2016 |
320.1 |
0.046 |
| 2017 |
1.4 |
0.029 |
| 2018 |
54.9 |
0.038 |
| 2019 |
77.1 |
0.062 |
| 2020 |
86.5 |
0.087 |
| 2021 |
91.7 |
0.112 |
| 2022 |
95.1 |
0.133 |
| 2023 |
97.6 |
0.150 |
| 2024 |
99.7 |
0.163 |
| 2025 |
101.5 |
0.170 |
| 2026 |
103.2 |
0.172 |
| 2027 |
104.9 |
0.169 |
| 2028 |
106.8 |
0.160 |
| 2029 |
109.0 |
0.146 |
| 2030 |
111.7 |
0.128 |
|
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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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