10214-2616 HDS 1491 (HD 89817)
10h 21m 24.30s -26° 15' 43.8" P.A. 310.00 sep 0.1 mag 8.58,10.13 Sp F7/F8V dist. 86.73 pc (282.91 l.y.)
Coord 2000 |
10214-2616 |
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Discov num |
HDS1491 |
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Comp |
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Coord arcsec 2000 |
10 21 24.30 -26 15 43.8 |
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Date first |
1991 |
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Date last |
2021 |
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Obs |
15 |
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Pa first |
65 |
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Pa last |
309.8 |
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P.A. Now (θ) |
255.1° |
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Sep first |
0.2 |
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Sep last |
0.095 |
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Sep. Now (ρ) |
0.081" |
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Mag pri |
8.58 |
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Mag sec |
10.13 |
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delta mag (ΔM) |
1.55 |
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Spectral class |
F7/F8V (yellow-white) |
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Pri motion ra |
-040 |
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Sec motion ra |
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Pri motion dec |
-016 |
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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 89817 |
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Constellation |
Hydra |
|
SAO |
178720 |
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HIP |
50724 |
|
Tycho2 |
6627-01441-1 |
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Gaia DR2 |
5472035042322559232 |
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HD |
89817 |
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CD |
CD-25 7957 |
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CP |
CP-25 4546 |
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Distance |
86.73 |
|
Distance ly |
282.91 |
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ORBITAL ELEMENTS
Period (P) | 22.1y | |
Periastron (T) | 2022.75y | |
Semi-major axis (a) | 0.113a | |
Eccentricity (e) | 0.287 | |
Inclination (i) | 180° | |
Longitude of periastron (ω) | 0° | |
Node (Ω) | 262.8° | |
Notes | | |
Reference | Tok2019c | |
Equinox | | |
Last observation | 2018 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
282.6 |
0.082 |
2001 |
252.1 |
0.081 |
2002 |
222.8 |
0.085 |
2003 |
197.4 |
0.093 |
2004 |
176.3 |
0.102 |
2005 |
158.7 |
0.111 |
2006 |
143.9 |
0.120 |
2007 |
131.0 |
0.128 |
2008 |
119.5 |
0.135 |
2009 |
108.9 |
0.140 |
2010 |
99.0 |
0.143 |
2011 |
89.4 |
0.145 |
2012 |
80.0 |
0.145 |
2013 |
70.5 |
0.144 |
2014 |
60.7 |
0.141 |
2015 |
50.4 |
0.137 |
2016 |
39.3 |
0.131 |
2017 |
27.0 |
0.124 |
2018 |
13.1 |
0.115 |
2019 |
356.7 |
0.106 |
2020 |
337.1 |
0.096 |
2021 |
313.5 |
0.088 |
2022 |
285.6 |
0.082 |
2023 |
255.1 |
0.081 |
2024 |
225.6 |
0.084 |
2025 |
199.8 |
0.092 |
2026 |
178.2 |
0.101 |
2027 |
160.4 |
0.111 |
2028 |
145.3 |
0.120 |
2029 |
132.2 |
0.127 |
2030 |
120.6 |
0.134 |
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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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