17173-3010 BU 1119 (HD 156184)
17h 17m 20.56s -30° 09' 52.0" P.A. 233.00 sep 0.3 mag 7.52,8.34 Sp G5IV dist. 169.49 pc (552.88 l.y.)
| Coord 2000 |
17173-3010 |
|
Discov num |
BU 1119 |
|
Comp |
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|
Coord arcsec 2000 |
17 17 20.56 -30 09 52.0 |
|
| Date first |
1889 |
|
Date last |
2008 |
|
Obs |
24 |
|
| Pa first |
356 |
|
Pa last |
232.6 |
|
P.A. Now (θ) |
232.6° |
|
| Sep first |
0.8 |
|
Sep last |
0.35 |
|
Sep. Now (ρ) |
0.35" |
|
| Mag pri |
7.52 |
|
Mag sec |
8.34 |
|
delta mag (ΔM) |
0.82 |
|
Spectral class |
G5IV (yellow) |
|
| Pri motion ra |
-023 |
|
Sec motion ra |
|
|
| Pri motion dec |
-004 |
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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 156184 |
|
Constellation |
Scorpius |
|
SAO |
208636 |
|
HIP |
84576 |
|
| Tycho2 |
7362-00111-1 |
|
Gaia DR2 |
4059182769898819968 |
|
HD |
156184 |
|
GC |
23322 |
|
| CD |
CD-3013996 |
|
CP |
CP-30 4641 |
|
Distance |
169.49 |
|
Distance ly |
552.88 |
|
ORBITAL ELEMENTS
| Period (P) | 1032y | |
Periastron (T) | 2012y | |
Semi-major axis (a) | 0.906a | |
| Eccentricity (e) | 0.612 | |
Inclination (i) | 131.5° | |
Longitude of periastron (ω) | 175.2° | |
| Node (Ω) | 45.3° | |
Notes | n | |
Reference | Zir2012b | |
| Equinox | 2000 | |
Last observation | 2008 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
243.5 |
0.341 |
| 2001 |
242.2 |
0.342 |
| 2002 |
240.9 |
0.343 |
| 2003 |
239.7 |
0.344 |
| 2004 |
238.4 |
0.345 |
| 2005 |
237.1 |
0.346 |
| 2006 |
235.9 |
0.347 |
| 2007 |
234.6 |
0.347 |
| 2008 |
233.4 |
0.348 |
| 2009 |
232.2 |
0.349 |
| 2010 |
230.9 |
0.350 |
| 2011 |
229.7 |
0.350 |
| 2012 |
228.5 |
0.351 |
| 2013 |
227.3 |
0.351 |
| 2014 |
226.1 |
0.352 |
| 2015 |
224.8 |
0.352 |
| 2016 |
223.6 |
0.352 |
| 2017 |
222.4 |
0.353 |
| 2018 |
221.2 |
0.353 |
| 2019 |
220.0 |
0.353 |
| 2020 |
218.8 |
0.353 |
| 2021 |
217.6 |
0.353 |
| 2022 |
216.4 |
0.353 |
| 2023 |
215.2 |
0.353 |
| 2024 |
214.0 |
0.353 |
| 2025 |
212.8 |
0.352 |
| 2026 |
211.6 |
0.352 |
| 2027 |
210.4 |
0.352 |
| 2028 |
209.1 |
0.351 |
| 2029 |
207.9 |
0.351 |
| 2030 |
206.7 |
0.351 |
|
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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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