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 |
|
Discov num |
FIN 356 |
|
Comp |
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Coord arcsec 2000 |
17 19 30.51 -50 03 49.3 |
|
| Date first |
1959 |
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Date last |
2021 |
|
Obs |
19 |
|
| Pa first |
112 |
|
Pa last |
101 |
|
P.A. Now (θ) |
89.3° |
|
| Sep first |
0.1 |
|
Sep last |
0.074 |
|
Sep. Now (ρ) |
0.055" |
|
| Mag pri |
7.00 |
|
Mag sec |
7.00 |
|
delta mag (ΔM) |
0 |
|
Spectral class |
F8III+B9V (yellow-white/blue-white) |
|
| Pri motion ra |
+012 |
|
Sec motion ra |
|
|
| 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 |
|
Constellation |
Ara |
|
SAO |
244631 |
|
HIP |
84759 |
|
| Tycho2 |
8349-03741-1 |
|
Gaia DR2 |
5926350154581350528 |
|
HD |
156331 |
|
HR |
6423 |
|
| GC |
23365 |
|
CD |
CD-4911324 |
|
CP |
CP-49 9879 |
|
Distance |
59.03 |
|
| Distance ly |
192.56 |
|
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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