17309-5621 FIN 257
17h 30m 56.97s -56° 20' 40.5" P.A. 122.00 sep 0.1 mag 9.50,9.90 Sp G2
| Coord 2000 |
17309-5621 |
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Discov num |
FIN 257 |
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Comp |
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Coord arcsec 2000 |
17 30 56.97 -56 20 40.5 |
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| Date first |
1930 |
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Date last |
2021 |
|
Obs |
8 |
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| Pa first |
327 |
|
Pa last |
122.1 |
|
P.A. Now (θ) |
122.1° |
|
| Sep first |
0.5 |
|
Sep last |
0.113 |
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Sep. Now (ρ) |
0.113" |
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| Mag pri |
9.50 |
|
Mag sec |
9.90 |
|
delta mag (ΔM) |
0.4 |
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Spectral class |
G2 (yellow) |
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| Pri motion ra |
-023 |
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Sec motion ra |
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| Pri motion dec |
-052 |
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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
| Constellation |
Ara |
|
Tycho2 |
8736-02846-1 |
|
Gaia DR2 |
5919391134996585984 |
|
ORBITAL ELEMENTS
| Period (P) | 700y | |
Periastron (T) | 2017.95y | |
Semi-major axis (a) | 0.79a | |
| Eccentricity (e) | 0.8 | |
Inclination (i) | 49.2° | |
Longitude of periastron (ω) | 49.2° | |
| Node (Ω) | 55.7° | |
Notes | | |
Reference | Tok2019c | |
| Equinox | | |
Last observation | 2018 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
26.8 |
0.246 |
| 2001 |
28.9 |
0.242 |
| 2002 |
31.1 |
0.237 |
| 2003 |
33.4 |
0.232 |
| 2004 |
35.8 |
0.227 |
| 2005 |
38.3 |
0.222 |
| 2006 |
40.9 |
0.217 |
| 2007 |
43.7 |
0.211 |
| 2008 |
46.6 |
0.205 |
| 2009 |
49.6 |
0.199 |
| 2010 |
52.9 |
0.192 |
| 2011 |
56.5 |
0.185 |
| 2012 |
60.3 |
0.178 |
| 2013 |
64.4 |
0.170 |
| 2014 |
69.0 |
0.162 |
| 2015 |
74.1 |
0.153 |
| 2016 |
79.7 |
0.145 |
| 2017 |
86.1 |
0.137 |
| 2018 |
93.2 |
0.129 |
| 2019 |
101.2 |
0.122 |
| 2020 |
110.0 |
0.117 |
| 2021 |
119.5 |
0.114 |
| 2022 |
129.4 |
0.112 |
| 2023 |
139.3 |
0.114 |
| 2024 |
148.8 |
0.117 |
| 2025 |
157.5 |
0.123 |
| 2026 |
165.4 |
0.131 |
| 2027 |
172.3 |
0.140 |
| 2028 |
178.3 |
0.150 |
| 2029 |
183.5 |
0.161 |
| 2030 |
188.0 |
0.172 |
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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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