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 |
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Discov num |
B 1871 |
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Comp |
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Coord arcsec 2000 |
17 53 54.77 -34 45 09.8 |
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Date first |
1929 |
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Date last |
2021 |
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Obs |
17 |
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Pa first |
90 |
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Pa last |
94.9 |
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P.A. Now (θ) |
94.9° |
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Sep first |
0.3 |
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Sep last |
0.298 |
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Sep. Now (ρ) |
0.298" |
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Mag pri |
6.50 |
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Mag sec |
7.30 |
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delta mag (ΔM) |
0.8 |
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Spectral class |
B9V+B9V (blue-white/blue-white) |
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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 |
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Constellation |
Scorpius |
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SAO |
209428 |
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HIP |
87616 |
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Tycho2 |
7386-00562-1 |
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Gaia DR2 |
4040825529908227072 |
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HD |
162724 |
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HR |
6662 |
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GC |
24314 |
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CD |
CD-3412226 |
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Distance |
315.46 |
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Distance ly |
1029.03 |
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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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