10193-1232 RST 3688 (HD 89455)
10h 19m 16.88s -12° 31' 41.2" P.A. 143.00 sep 0.5 mag 6.21,8.54 Sp A9V dist. 65.66 pc (214.18 l.y.)
Coord 2000 |
10193-1232 |
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Discov num |
RST3688 |
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Comp |
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Coord arcsec 2000 |
10 19 16.88 -12 31 41.2 |
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Date first |
1937 |
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Date last |
2019 |
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Obs |
17 |
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Pa first |
306 |
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Pa last |
142.8 |
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P.A. Now (θ) |
142.8° |
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Sep first |
0.8 |
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Sep last |
0.462 |
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Sep. Now (ρ) |
0.462" |
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Mag pri |
6.21 |
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Mag sec |
8.54 |
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delta mag (ΔM) |
2.33 |
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Spectral class |
A9V (white) |
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Pri motion ra |
-013 |
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Sec motion ra |
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Pri motion dec |
-020 |
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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 89455 |
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Constellation |
Hydra |
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SAO |
155894 |
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HIP |
50536 |
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Tycho2 |
5496-01789-1 |
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Gaia DR2 |
3753670544756354688 |
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HD |
89455 |
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HR |
4055 |
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GC |
14166 |
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BD |
BD-11 2851 |
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Distance |
65.66 |
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Distance ly |
214.18 |
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ORBITAL ELEMENTS
Period (P) | 180y | |
Periastron (T) | 2005.08y | |
Semi-major axis (a) | 0.6852a | |
Eccentricity (e) | 0.544 | |
Inclination (i) | 80.9° | |
Longitude of periastron (ω) | 278.5° | |
Node (Ω) | 142.1° | |
Notes | | |
Reference | Tok2020e | |
Equinox | | |
Last observation | 2019 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
337.2 |
0.177 |
2001 |
342.3 |
0.139 |
2002 |
351.2 |
0.101 |
2003 |
10.0 |
0.067 |
2004 |
50.9 |
0.050 |
2005 |
93.2 |
0.065 |
2006 |
113.1 |
0.098 |
2007 |
122.4 |
0.136 |
2008 |
127.7 |
0.174 |
2009 |
131.1 |
0.211 |
2010 |
133.5 |
0.246 |
2011 |
135.3 |
0.279 |
2012 |
136.7 |
0.310 |
2013 |
137.9 |
0.338 |
2014 |
138.9 |
0.364 |
2015 |
139.8 |
0.387 |
2016 |
140.6 |
0.408 |
2017 |
141.3 |
0.427 |
2018 |
142.0 |
0.443 |
2019 |
142.6 |
0.458 |
2020 |
143.2 |
0.471 |
2021 |
143.7 |
0.482 |
2022 |
144.2 |
0.492 |
2023 |
144.7 |
0.500 |
2024 |
145.2 |
0.507 |
2025 |
145.7 |
0.513 |
2026 |
146.2 |
0.517 |
2027 |
146.6 |
0.521 |
2028 |
147.1 |
0.523 |
2029 |
147.6 |
0.525 |
2030 |
148.0 |
0.525 |
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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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