08158-1027 RST 3578 AB
08h 15m 45.12s -10° 26' 54.4" P.A. 66.00 sep 0.1 mag 10.10,10.10 Sp K5V dist. 41.22 pc (134.46 l.y.)
Coord 2000 |
08158-1027 |
|
Discov num |
RST3578 |
|
Comp |
AB |
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Coord arcsec 2000 |
08 15 45.12 -10 26 54.4 |
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Date first |
1938 |
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Date last |
2020 |
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Obs |
14 |
|
Pa first |
275 |
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Pa last |
66.1 |
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P.A. Now (θ) |
82.5° |
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Sep first |
0.3 |
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Sep last |
0.146 |
|
Sep. Now (ρ) |
0.221" |
|
Mag pri |
10.10 |
|
Mag sec |
10.10 |
|
delta mag (ΔM) |
0 |
|
Spectral class |
K5V (yellow-orange) |
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Pri motion ra |
-062 |
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Sec motion ra |
|
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Pri motion dec |
-050 |
|
Sec motion dec |
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Notes |
O
(Orbital solution) |
|
This double is physical.
08158-1027 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
154039 |
08 15 45 -10 26 54 |
RST 3578 AB |
2020 |
14 |
66 |
0.1 |
10.10 |
10.10 |
0.00 |
Y |
<=== |
Show |
|
154039 |
08 15 45 -10 26 54 |
SKF 427 AB,C |
2015 |
9 |
142 |
26.7 |
9.30 |
15.00 |
5.70 |
|
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Triple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Hydra |
|
SAO |
154039 |
|
HIP |
40465 |
|
Tycho2 |
5430-02287-1 |
|
Gaia DR2 |
5728453828366818816 |
|
HD |
69247 |
|
BD |
BD-10 2443 |
|
Distance |
41.22 |
|
Distance ly |
134.46 |
|
ORBITAL ELEMENTS
Period (P) | 29.37y | ± 0.09 |
Periastron (T) | 2017.41y | ± 0.07 |
Semi-major axis (a) | 0.222a | ± 0.0043 |
Eccentricity (e) | 0.47 | ± 0.019 |
Inclination (i) | 59.3° | ± 1.7 |
Longitude of periastron (ω) | 216.8° | ± 2.4 |
Node (Ω) | 93.3° | ± 1.1 |
Notes | | |
Reference | Tok2020e | |
Equinox | | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
105.5 |
0.300 |
2001 |
108.6 |
0.295 |
2002 |
111.8 |
0.287 |
2003 |
115.2 |
0.276 |
2004 |
118.9 |
0.262 |
2005 |
123.1 |
0.246 |
2006 |
128.0 |
0.227 |
2007 |
133.8 |
0.206 |
2008 |
140.9 |
0.185 |
2009 |
150.0 |
0.163 |
2010 |
161.6 |
0.143 |
2011 |
176.6 |
0.127 |
2012 |
194.9 |
0.118 |
2013 |
214.8 |
0.117 |
2014 |
233.8 |
0.123 |
2015 |
250.7 |
0.130 |
2016 |
266.5 |
0.130 |
2017 |
284.5 |
0.113 |
2018 |
313.8 |
0.081 |
2019 |
7.3 |
0.070 |
2020 |
47.8 |
0.102 |
2021 |
66.0 |
0.146 |
2022 |
75.9 |
0.187 |
2023 |
82.5 |
0.221 |
2024 |
87.4 |
0.248 |
2025 |
91.5 |
0.269 |
2026 |
95.0 |
0.284 |
2027 |
98.3 |
0.294 |
2028 |
101.3 |
0.299 |
2029 |
104.4 |
0.300 |
2030 |
107.4 |
0.297 |
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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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