10279+3642 HU 879 (Bet LMi)
10h 27m 53.09s +36° 42' 26.9" P.A. 226.00 sep 0.5 mag 4.62,6.04 Sp G8III dist. 47.19 pc (153.93 l.y.)
Coord 2000 |
10279+3642 |
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Discov num |
HU 879 |
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Comp |
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Coord arcsec 2000 |
10 27 53.09 +36 42 26.9 |
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Date first |
1904 |
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Date last |
2018 |
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Obs |
172 |
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Pa first |
231 |
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Pa last |
226.3 |
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P.A. Now (θ) |
229.6° |
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Sep first |
0.5 |
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Sep last |
0.51 |
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Sep. Now (ρ) |
0.428" |
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Mag pri |
4.62 |
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Mag sec |
6.04 |
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delta mag (ΔM) |
1.42 |
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Spectral class |
G8III (yellow) |
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Pri motion ra |
-118 |
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Sec motion ra |
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Pri motion dec |
-101 |
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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
Name |
Bet LMi |
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Constellation |
Leo Minor |
|
SAO |
62053 |
|
HIP |
51233 |
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Tycho2 |
2517-01209-1 |
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Gaia DR2 |
754644862217331584 |
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HD |
90537 |
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HR |
4100 |
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GC |
14358 |
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ADS |
7780 |
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BD |
BD+37 2080 |
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Bayer |
Beta Leonis Minoris |
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Bayer name |
Bet LMi |
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Flamsteed |
31 Leonis Minoris |
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Flamsteed name |
31 LMi |
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FK5 |
390 |
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Distance |
47.19 |
|
Distance ly |
153.93 |
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Bayer greek |
β LMi |
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ORBITAL ELEMENTS
Period (P) | 13965d (38.23y) | ± 40 |
Periastron (T) | 51411.1d (1999.635y) | ± 4.8 |
Semi-major axis (a) | 0.3782a | ± 0.0007 |
Eccentricity (e) | 0.68 | ± 0.002 |
Inclination (i) | 81.4° | ± 0.1 |
Longitude of periastron (ω) | 35.7° | ± 0.12 |
Node (Ω) | 40.7° | ± 0.1 |
Notes | n | |
Reference | WaX2020 | |
Equinox | | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
55.1 |
0.065 |
2001 |
196.2 |
0.058 |
2002 |
211.9 |
0.159 |
2003 |
215.7 |
0.243 |
2004 |
217.6 |
0.312 |
2005 |
218.9 |
0.368 |
2006 |
219.9 |
0.414 |
2007 |
220.7 |
0.452 |
2008 |
221.3 |
0.483 |
2009 |
221.9 |
0.507 |
2010 |
222.5 |
0.526 |
2011 |
223.0 |
0.540 |
2012 |
223.5 |
0.550 |
2013 |
224.0 |
0.555 |
2014 |
224.5 |
0.557 |
2015 |
224.9 |
0.555 |
2016 |
225.4 |
0.550 |
2017 |
225.9 |
0.541 |
2018 |
226.4 |
0.530 |
2019 |
227.0 |
0.515 |
2020 |
227.5 |
0.498 |
2021 |
228.2 |
0.477 |
2022 |
228.8 |
0.454 |
2023 |
229.6 |
0.428 |
2024 |
230.5 |
0.400 |
2025 |
231.5 |
0.369 |
2026 |
232.7 |
0.335 |
2027 |
234.1 |
0.299 |
2028 |
236.0 |
0.261 |
2029 |
238.6 |
0.220 |
2030 |
242.3 |
0.178 |
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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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