17194-4413 HDO 269 (HD 156398)
17h 19m 24.63s -44° 13' 22.8" P.A. 233.00 sep 0.1 mag 7.30,7.50 Sp B9.5III dist. 325.73 pc (1062.53 l.y.)
Coord 2000 |
17194-4413 |
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Discov num |
HDO 269 |
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Comp |
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Coord arcsec 2000 |
17 19 24.63 -44 13 22.8 |
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Date first |
1897 |
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Date last |
2017 |
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Obs |
29 |
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Pa first |
350 |
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Pa last |
233.2 |
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P.A. Now (θ) |
233.2° |
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Sep first |
0.6 |
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Sep last |
0.104 |
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Sep. Now (ρ) |
0.104" |
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Mag pri |
7.30 |
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Mag sec |
7.50 |
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delta mag (ΔM) |
0.2 |
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Spectral class |
B9.5III (blue-white) |
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Pri motion ra |
+007 |
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Sec motion ra |
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Pri motion dec |
-016 |
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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 156398 |
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Constellation |
Scorpius |
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SAO |
227821 |
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HIP |
84748 |
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Tycho2 |
7882-00057-1 |
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Gaia DR2 |
5953285848666591232 |
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HD |
156398 |
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HR |
6427 |
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GC |
23367 |
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CD |
CD-4411595 |
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CP |
CP-44 8358 |
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Distance |
325.73 |
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Distance ly |
1062.53 |
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ORBITAL ELEMENTS
Period (P) | 1700y | |
Periastron (T) | 1999.5y | |
Semi-major axis (a) | 0.806a | |
Eccentricity (e) | 0.949 | |
Inclination (i) | 72.4° | |
Longitude of periastron (ω) | 112.7° | |
Node (Ω) | 27.7° | |
Notes | n | |
Reference | Tok2018b | |
Equinox | 2000 | |
Last observation | 2017 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
184.7 |
0.026 |
2001 |
197.3 |
0.039 |
2002 |
203.8 |
0.051 |
2003 |
208.1 |
0.060 |
2004 |
211.4 |
0.067 |
2005 |
214.1 |
0.073 |
2006 |
216.4 |
0.078 |
2007 |
218.5 |
0.082 |
2008 |
220.4 |
0.085 |
2009 |
222.1 |
0.088 |
2010 |
223.7 |
0.091 |
2011 |
225.3 |
0.094 |
2012 |
226.7 |
0.096 |
2013 |
228.1 |
0.098 |
2014 |
229.5 |
0.100 |
2015 |
230.8 |
0.101 |
2016 |
232.0 |
0.103 |
2017 |
233.3 |
0.104 |
2018 |
234.4 |
0.105 |
2019 |
235.6 |
0.107 |
2020 |
236.7 |
0.108 |
2021 |
237.9 |
0.109 |
2022 |
239.0 |
0.110 |
2023 |
240.0 |
0.111 |
2024 |
241.1 |
0.112 |
2025 |
242.1 |
0.113 |
2026 |
243.1 |
0.114 |
2027 |
244.1 |
0.115 |
2028 |
245.1 |
0.116 |
2029 |
246.1 |
0.117 |
2030 |
247.1 |
0.117 |
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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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