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 |
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Discov num |
CHR 145 |
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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 |
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Obs |
25 |
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Pa first |
38 |
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Pa last |
157.6 |
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P.A. Now (θ) |
157.6° |
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Sep first |
0.2 |
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Sep last |
0.121 |
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Sep. Now (ρ) |
0.121" |
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Mag pri |
8.12 |
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Mag sec |
10.43 |
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delta mag (ΔM) |
2.31 |
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Spectral class |
K0V (yellow-orange) |
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Pri motion ra |
-236 |
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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 |
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Constellation |
Leo |
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SAO |
81134 |
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HIP |
49018 |
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Tycho2 |
1961-01385-1 |
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Gaia DR2 |
642660938662899456 |
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HD |
86590 |
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GC |
13748 |
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GL |
NN 3580 |
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BD |
BD+25 2191 |
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Distance |
31.69 |
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Distance ly |
103.37 |
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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 |
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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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