17541-4821 B 1870 (HD 162551)
17h 54m 04.21s -48° 20' 30.7" P.A. 187.00 sep 0.1 mag 9.20,9.40 Sp F2V dist. 257.07 pc (838.56 l.y.)
| Coord 2000 |
17541-4821 |
|
Discov num |
B 1870 |
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Comp |
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Coord arcsec 2000 |
17 54 04.21 -48 20 30.7 |
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| Date first |
1930 |
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Date last |
2021 |
|
Obs |
12 |
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| Pa first |
144 |
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Pa last |
186.9 |
|
P.A. Now (θ) |
182.7° |
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| Sep first |
0.2 |
|
Sep last |
0.102 |
|
Sep. Now (ρ) |
0.105" |
|
| Mag pri |
9.20 |
|
Mag sec |
9.40 |
|
delta mag (ΔM) |
0.2 |
|
Spectral class |
F2V (yellow-white) |
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| Pri motion ra |
+001 |
|
Sec motion ra |
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|
| Pri motion dec |
-060 |
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Sec motion dec |
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| Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 162551 |
|
Constellation |
Ara |
|
SAO |
228523 |
|
HIP |
87635 |
|
| Tycho2 |
8348-00735-1 |
|
Gaia DR2 |
5947703426280395264 |
|
HD |
162551 |
|
CD |
CD-4812133 |
|
| CP |
CP-48 9568 |
|
Distance |
257.07 |
|
Distance ly |
838.56 |
|
ORBITAL ELEMENTS
| Period (P) | 111.3y | ± 6.7 |
Periastron (T) | 1999.76y | ± 0.75 |
Semi-major axis (a) | 0.153a | ± 0.008 |
| Eccentricity (e) | 0.487 | ± 0.024 |
Inclination (i) | 126.9° | ± 2.3 |
Longitude of periastron (ω) | 151.6° | ± 2.4 |
| Node (Ω) | 110.7° | ± 3.5 |
Notes | | |
Reference | Tok2019c | |
| Equinox | | |
Last observation | 2018 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
306.9 |
0.074 |
| 2001 |
299.9 |
0.077 |
| 2002 |
293.6 |
0.081 |
| 2003 |
287.6 |
0.083 |
| 2004 |
282.0 |
0.084 |
| 2005 |
276.4 |
0.085 |
| 2006 |
270.9 |
0.085 |
| 2007 |
265.5 |
0.085 |
| 2008 |
259.9 |
0.085 |
| 2009 |
254.4 |
0.084 |
| 2010 |
248.7 |
0.083 |
| 2011 |
242.9 |
0.083 |
| 2012 |
237.2 |
0.083 |
| 2013 |
231.4 |
0.083 |
| 2014 |
225.6 |
0.083 |
| 2015 |
220.0 |
0.084 |
| 2016 |
214.5 |
0.086 |
| 2017 |
209.2 |
0.087 |
| 2018 |
204.1 |
0.090 |
| 2019 |
199.3 |
0.092 |
| 2020 |
194.7 |
0.095 |
| 2021 |
190.4 |
0.098 |
| 2022 |
186.4 |
0.101 |
| 2023 |
182.7 |
0.105 |
| 2024 |
179.2 |
0.108 |
| 2025 |
175.9 |
0.112 |
| 2026 |
172.9 |
0.116 |
| 2027 |
170.0 |
0.120 |
| 2028 |
167.4 |
0.124 |
| 2029 |
164.9 |
0.128 |
| 2030 |
162.6 |
0.133 |
|
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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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