17195-5004 FIN 356 (HD 156331)
17h 19m 30.51s -50° 03' 49.3" P.A. 101.00 sep 0.1 mag 7.00,7.00 Sp F8III+B9V dist. 59.03 pc (192.56 l.y.)
Coord 2000 |
17195-5004 |
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Discov num |
FIN 356 |
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Comp |
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Coord arcsec 2000 |
17 19 30.51 -50 03 49.3 |
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Date first |
1959 |
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Date last |
2021 |
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Obs |
19 |
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Pa first |
112 |
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Pa last |
101 |
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P.A. Now (θ) |
89.3° |
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Sep first |
0.1 |
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Sep last |
0.074 |
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Sep. Now (ρ) |
0.055" |
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Mag pri |
7.00 |
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Mag sec |
7.00 |
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delta mag (ΔM) |
0 |
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Spectral class |
F8III+B9V (yellow-white/blue-white) |
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Pri motion ra |
+012 |
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Sec motion ra |
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Pri motion dec |
-038 |
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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 156331 |
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Constellation |
Ara |
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SAO |
244631 |
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HIP |
84759 |
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Tycho2 |
8349-03741-1 |
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Gaia DR2 |
5926350154581350528 |
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HD |
156331 |
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HR |
6423 |
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GC |
23365 |
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CD |
CD-4911324 |
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CP |
CP-49 9879 |
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Distance |
59.03 |
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Distance ly |
192.56 |
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ORBITAL ELEMENTS
Period (P) | 12.93y | ± 0.15 |
Periastron (T) | 2010.65y | ± 0.16 |
Semi-major axis (a) | 0.114a | ± 0.016 |
Eccentricity (e) | 0.814 | ± 0.053 |
Inclination (i) | 98.6° | ± 1.9 |
Longitude of periastron (ω) | 93.6° | ± 1.4 |
Node (Ω) | 85.9° | ± 1 |
Notes | | |
Reference | Tok2017b | |
Equinox | 2000 | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
246.2 |
0.058 |
2001 |
235.2 |
0.049 |
2002 |
218.2 |
0.038 |
2003 |
191.0 |
0.031 |
2004 |
158.5 |
0.032 |
2005 |
134.0 |
0.041 |
2006 |
119.1 |
0.052 |
2007 |
109.6 |
0.063 |
2008 |
102.7 |
0.072 |
2009 |
96.9 |
0.074 |
2010 |
90.0 |
0.058 |
2011 |
264.4 |
0.042 |
2012 |
254.1 |
0.062 |
2013 |
245.5 |
0.058 |
2014 |
234.3 |
0.048 |
2015 |
216.6 |
0.037 |
2016 |
188.8 |
0.031 |
2017 |
156.4 |
0.033 |
2018 |
132.7 |
0.041 |
2019 |
118.3 |
0.053 |
2020 |
109.1 |
0.064 |
2021 |
102.3 |
0.072 |
2022 |
96.5 |
0.073 |
2023 |
89.3 |
0.055 |
2024 |
263.3 |
0.045 |
2025 |
253.5 |
0.062 |
2026 |
244.9 |
0.057 |
2027 |
233.3 |
0.047 |
2028 |
215.0 |
0.037 |
2029 |
186.5 |
0.031 |
2030 |
154.4 |
0.033 |
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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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