17415-5348 HDS 2502 (HD 160177)
17h 41m 27.68s -53° 48' 10.5" P.A. 72.00 sep 0.1 mag 10.17,10.47 Sp K1IV/V dist. 64.14 pc (209.22 l.y.)
| Coord 2000 |
17415-5348 |
|
Discov num |
HDS2502 |
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Comp |
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Coord arcsec 2000 |
17 41 27.68 -53 48 10.5 |
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| Date first |
1991 |
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Date last |
2021 |
|
Obs |
12 |
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| Pa first |
347 |
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Pa last |
72 |
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P.A. Now (θ) |
45° |
|
| Sep first |
0.2 |
|
Sep last |
0.096 |
|
Sep. Now (ρ) |
0.129" |
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| Mag pri |
10.17 |
|
Mag sec |
10.47 |
|
delta mag (ΔM) |
0.3 |
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Spectral class |
K1IV/V (yellow-orange) |
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| Pri motion ra |
-051 |
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Sec motion ra |
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| Pri motion dec |
-030 |
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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 160177 |
|
Constellation |
Ara |
|
SAO |
244944 |
|
HIP |
86569 |
|
| Tycho2 |
8729-02663-1 |
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Gaia DR2 |
5921743681878451328 |
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HD |
160177 |
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CP |
CP-53 8730 |
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| Distance |
64.14 |
|
Distance ly |
209.22 |
|
ORBITAL ELEMENTS
| Period (P) | 20.39y | ± 0.34 |
Periastron (T) | 2018.04y | ± 0.02 |
Semi-major axis (a) | 0.1341a | ± 0.001 |
| Eccentricity (e) | 0.594 | ± 0.008 |
Inclination (i) | 136.7° | ± 1.3 |
Longitude of periastron (ω) | 321.5° | ± 2.1 |
| Node (Ω) | 158.5° | ± 1.6 |
Notes | | |
Reference | Tok2020e | |
| Equinox | | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
89.9 |
0.085 |
| 2001 |
67.9 |
0.101 |
| 2002 |
52.4 |
0.119 |
| 2003 |
40.9 |
0.136 |
| 2004 |
31.9 |
0.152 |
| 2005 |
24.6 |
0.167 |
| 2006 |
18.4 |
0.179 |
| 2007 |
12.9 |
0.188 |
| 2008 |
7.8 |
0.194 |
| 2009 |
3.0 |
0.197 |
| 2010 |
358.2 |
0.197 |
| 2011 |
353.3 |
0.193 |
| 2012 |
348.1 |
0.185 |
| 2013 |
342.3 |
0.172 |
| 2014 |
335.4 |
0.154 |
| 2015 |
326.0 |
0.128 |
| 2016 |
310.9 |
0.095 |
| 2017 |
276.0 |
0.056 |
| 2018 |
191.7 |
0.048 |
| 2019 |
135.8 |
0.067 |
| 2020 |
100.7 |
0.079 |
| 2021 |
75.6 |
0.094 |
| 2022 |
57.8 |
0.112 |
| 2023 |
45.0 |
0.129 |
| 2024 |
35.2 |
0.146 |
| 2025 |
27.3 |
0.161 |
| 2026 |
20.7 |
0.174 |
| 2027 |
15.0 |
0.184 |
| 2028 |
9.7 |
0.192 |
| 2029 |
4.8 |
0.196 |
| 2030 |
0.1 |
0.198 |
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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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