10000+2433 CHR 145 (DH Leo)
10h 00m 01.70s +24° 33' 09.9" P.A. 158.00 sep 0.1 mag 8.12,10.43 Sp K0V dist. 31.69 pc (103.37 l.y.)
| Coord 2000 |
10000+2433 |
|
Discov num |
CHR 145 |
|
Comp |
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Coord arcsec 2000 |
10 00 01.70 +24 33 09.9 |
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| Date first |
1989 |
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Date last |
2021 |
|
Obs |
25 |
|
| Pa first |
38 |
|
Pa last |
157.6 |
|
P.A. Now (θ) |
157.6° |
|
| Sep first |
0.2 |
|
Sep last |
0.121 |
|
Sep. Now (ρ) |
0.121" |
|
| Mag pri |
8.12 |
|
Mag sec |
10.43 |
|
delta mag (ΔM) |
2.31 |
|
Spectral class |
K0V (yellow-orange) |
|
| Pri motion ra |
-236 |
|
Sec motion ra |
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|
| Pri motion dec |
-032 |
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Sec motion dec |
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| Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Var name |
DH Leo |
|
Constellation |
Leo |
|
SAO |
81134 |
|
HIP |
49018 |
|
| Tycho2 |
1961-01385-1 |
|
Gaia DR2 |
642660938662899456 |
|
HD |
86590 |
|
GC |
13748 |
|
| GL |
NN 3580 |
|
BD |
BD+25 2191 |
|
Distance |
31.69 |
|
Distance ly |
103.37 |
|
ORBITAL ELEMENTS
| Period (P) | 44.13y | |
Periastron (T) | 2003.21y | |
Semi-major axis (a) | 0.437a | |
| Eccentricity (e) | 0.748 | |
Inclination (i) | 96.3° | |
Longitude of periastron (ω) | 271.6° | |
| Node (Ω) | 197.5° | |
Notes | n | |
Reference | Hrt2012a | |
| Equinox | 2000 | |
Last observation | 2011 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
20.7 |
0.267 |
| 2001 |
18.9 |
0.229 |
| 2002 |
15.9 |
0.159 |
| 2003 |
356.6 |
0.033 |
| 2004 |
201.2 |
0.118 |
| 2005 |
196.8 |
0.204 |
| 2006 |
194.6 |
0.248 |
| 2007 |
192.9 |
0.271 |
| 2008 |
191.4 |
0.281 |
| 2009 |
190.0 |
0.283 |
| 2010 |
188.6 |
0.280 |
| 2011 |
187.1 |
0.272 |
| 2012 |
185.5 |
0.262 |
| 2013 |
183.8 |
0.249 |
| 2014 |
181.8 |
0.234 |
| 2015 |
179.6 |
0.218 |
| 2016 |
177.0 |
0.201 |
| 2017 |
173.9 |
0.183 |
| 2018 |
170.2 |
0.165 |
| 2019 |
165.5 |
0.147 |
| 2020 |
159.5 |
0.130 |
| 2021 |
151.8 |
0.113 |
| 2022 |
141.7 |
0.100 |
| 2023 |
128.8 |
0.089 |
| 2024 |
113.5 |
0.084 |
| 2025 |
97.5 |
0.085 |
| 2026 |
82.8 |
0.092 |
| 2027 |
70.9 |
0.104 |
| 2028 |
61.6 |
0.118 |
| 2029 |
54.5 |
0.135 |
| 2030 |
49.0 |
0.153 |
| 2031 |
44.7 |
0.171 |
| 2032 |
41.2 |
0.189 |
| 2033 |
38.3 |
0.207 |
| 2034 |
35.8 |
0.225 |
| 2035 |
33.7 |
0.241 |
| 2036 |
31.9 |
0.257 |
| 2037 |
30.3 |
0.270 |
| 2038 |
28.8 |
0.282 |
| 2039 |
27.4 |
0.292 |
| 2040 |
26.1 |
0.299 |
| 2041 |
24.9 |
0.302 |
| 2042 |
23.6 |
0.299 |
| 2043 |
22.3 |
0.290 |
| 2044 |
20.9 |
0.271 |
| 2045 |
19.1 |
0.235 |
| 2046 |
16.4 |
0.171 |
| 2047 |
5.0 |
0.053 |
| 2048 |
202.4 |
0.103 |
| 2049 |
197.2 |
0.196 |
| 2050 |
194.9 |
0.244 |
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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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