09228-0950 A 1342 AB
09h 22m 50.87s -09° 50' 19.5" P.A. 49.00 sep 0.1 mag 6.99,7.84 Sp A3V dist. 144.51 pc (471.39 l.y.)
| Coord 2000 |
09228-0950 |
|
Discov num |
A 1342 |
|
Comp |
AB |
|
Coord arcsec 2000 |
09 22 50.87 -09 50 19.5 |
|
| Date first |
1905 |
|
Date last |
2020 |
|
Obs |
79 |
|
| Pa first |
198 |
|
Pa last |
48.6 |
|
P.A. Now (θ) |
59.7° |
|
| Sep first |
0.1 |
|
Sep last |
0.12 |
|
Sep. Now (ρ) |
0.1" |
|
| Mag pri |
6.99 |
|
Mag sec |
7.84 |
|
delta mag (ΔM) |
0.85 |
|
Spectral class |
A3V (white) |
|
| Pri motion ra |
-023 |
|
Sec motion ra |
|
|
| Pri motion dec |
-016 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
09228-0950 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
136799 |
09 22 51 -09 50 20 |
A 1342 AB |
2020 |
79 |
49 |
0.1 |
6.99 |
7.84 |
0.85 |
Y |
<=== |
| Show |
KU Hya |
136799 |
09 22 51 -09 50 20 |
RST 5568 AB,C |
2013 |
16 |
209 |
1.9 |
6.53 |
11.60 |
5.07 |
|
|
Triple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Var name |
KU Hya |
|
Constellation |
Hydra |
|
SAO |
136799 |
|
HIP |
45999 |
|
| Tycho2 |
5463-01516-1 |
|
Gaia DR2 |
5739817903810452352 |
|
HD |
81009 |
|
HR |
3724 |
|
| GC |
12936 |
|
ADS |
7334 |
|
BD |
BD-09 2816 |
|
Distance |
144.51 |
|
| Distance ly |
471.39 |
|
ORBITAL ELEMENTS
| Period (P) | 56.61y | ± 0.22 |
Periastron (T) | 2013.51y | ± 0.1 |
Semi-major axis (a) | 0.166a | ± 0.001 |
| Eccentricity (e) | 0 | |
Inclination (i) | 66.7° | ± 0.5 |
Longitude of periastron (ω) | 0° | |
| Node (Ω) | 24.9° | ± 0.3 |
Notes | n | |
Reference | Tok2021c | |
| Equinox | 2000 | |
Last observation | 2021 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
305.1 |
0.067 |
| 2001 |
319.9 |
0.071 |
| 2002 |
332.3 |
0.079 |
| 2003 |
342.1 |
0.089 |
| 2004 |
350.0 |
0.100 |
| 2005 |
356.2 |
0.111 |
| 2006 |
1.4 |
0.122 |
| 2007 |
5.7 |
0.132 |
| 2008 |
9.4 |
0.141 |
| 2009 |
12.7 |
0.149 |
| 2010 |
15.7 |
0.156 |
| 2011 |
18.4 |
0.161 |
| 2012 |
21.1 |
0.164 |
| 2013 |
23.6 |
0.166 |
| 2014 |
26.1 |
0.166 |
| 2015 |
28.7 |
0.164 |
| 2016 |
31.3 |
0.161 |
| 2017 |
34.1 |
0.156 |
| 2018 |
37.0 |
0.149 |
| 2019 |
40.3 |
0.141 |
| 2020 |
44.0 |
0.132 |
| 2021 |
48.3 |
0.122 |
| 2022 |
53.5 |
0.111 |
| 2023 |
59.7 |
0.100 |
| 2024 |
67.5 |
0.089 |
| 2025 |
77.3 |
0.079 |
| 2026 |
89.6 |
0.071 |
| 2027 |
104.4 |
0.067 |
| 2028 |
120.3 |
0.066 |
| 2029 |
135.6 |
0.069 |
| 2030 |
148.8 |
0.076 |
|
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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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