10455-2502 I 502 AB (HD 93227)
10h 45m 32.90s -25° 01' 34.0" P.A. 174.00 sep 0.1 mag 7.78,8.86 Sp K0IV dist. 186.22 pc (607.45 l.y.)
| Coord 2000 |
10455-2502 |
|
Discov num |
I 502 |
|
Comp |
AB |
|
Coord arcsec 2000 |
10 45 32.90 -25 01 34.0 |
|
| Date first |
1909 |
|
Date last |
2020 |
|
Obs |
20 |
|
| Pa first |
45 |
|
Pa last |
173.9 |
|
P.A. Now (θ) |
173.9° |
|
| Sep first |
0.6 |
|
Sep last |
0.103 |
|
Sep. Now (ρ) |
0.103" |
|
| Mag pri |
7.78 |
|
Mag sec |
8.86 |
|
delta mag (ΔM) |
1.08 |
|
Spectral class |
K0IV (yellow-orange) |
|
| Pri motion ra |
-029 |
|
Sec motion ra |
|
|
| Pri motion dec |
+017 |
|
Sec motion dec |
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|
| Notes |
O
(Orbital solution) |
|
This double is physical.
10455-2502 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 93227 |
179198 |
10 45 33 -25 01 34 |
I 502 AB |
2020 |
20 |
174 |
0.1 |
7.78 |
8.86 |
1.08 |
Y |
<=== |
| Show |
|
179198 |
10 45 33 -25 01 34 |
I 502 AC |
1959 |
2 |
140 |
2.0 |
7.78 |
13.30 |
5.52 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 93227 |
|
Constellation |
Hydra |
|
SAO |
179198 |
|
HIP |
52615 |
|
| Tycho2 |
6638-00872-1 |
|
Gaia DR2 |
5470288983497553280 |
|
HD |
93227 |
|
CD |
CD-24 9289 |
|
| CP |
CP-24 4557 |
|
Distance |
186.22 |
|
Distance ly |
607.45 |
|
ORBITAL ELEMENTS
| Period (P) | 256y | ± 44 |
Periastron (T) | 2016.58y | ± 0.22 |
Semi-major axis (a) | 0.307a | ± 0.028 |
| Eccentricity (e) | 0.728 | ± 0.028 |
Inclination (i) | 180° | |
Longitude of periastron (ω) | 0° | |
| Node (Ω) | 225.2° | ± 2.4 |
Notes | | |
Reference | Tok2019c | |
| Equinox | | |
Last observation | 2018 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
335.2 |
0.192 |
| 2001 |
332.7 |
0.185 |
| 2002 |
329.9 |
0.177 |
| 2003 |
326.9 |
0.169 |
| 2004 |
323.5 |
0.161 |
| 2005 |
319.9 |
0.153 |
| 2006 |
315.8 |
0.145 |
| 2007 |
311.2 |
0.137 |
| 2008 |
306.1 |
0.129 |
| 2009 |
300.4 |
0.122 |
| 2010 |
293.8 |
0.114 |
| 2011 |
286.3 |
0.107 |
| 2012 |
277.8 |
0.100 |
| 2013 |
268.2 |
0.094 |
| 2014 |
257.3 |
0.089 |
| 2015 |
245.4 |
0.086 |
| 2016 |
232.7 |
0.084 |
| 2017 |
219.7 |
0.084 |
| 2018 |
207.0 |
0.085 |
| 2019 |
194.9 |
0.089 |
| 2020 |
183.9 |
0.093 |
| 2021 |
174.0 |
0.099 |
| 2022 |
165.3 |
0.106 |
| 2023 |
157.7 |
0.113 |
| 2024 |
151.0 |
0.120 |
| 2025 |
145.1 |
0.128 |
| 2026 |
139.9 |
0.136 |
| 2027 |
135.3 |
0.144 |
| 2028 |
131.2 |
0.152 |
| 2029 |
127.4 |
0.160 |
| 2030 |
124.0 |
0.168 |
|
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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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