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 |
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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 |
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Obs |
12 |
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Pa first |
144 |
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Pa last |
186.9 |
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P.A. Now (θ) |
182.7° |
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Sep first |
0.2 |
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Sep last |
0.102 |
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Sep. Now (ρ) |
0.105" |
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Mag pri |
9.20 |
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Mag sec |
9.40 |
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delta mag (ΔM) |
0.2 |
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Spectral class |
F2V (yellow-white) |
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Pri motion ra |
+001 |
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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 |
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Constellation |
Ara |
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SAO |
228523 |
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HIP |
87635 |
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Tycho2 |
8348-00735-1 |
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Gaia DR2 |
5947703426280395264 |
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HD |
162551 |
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CD |
CD-4812133 |
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CP |
CP-48 9568 |
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Distance |
257.07 |
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Distance ly |
838.56 |
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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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