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 Discov num HU  879 Comp Coord arcsec 2000 10 27 53.09 +36 42 26.9
Date first 1904 Date last 2018 Obs 172
Pa first 231 Pa last 226.3 P.A. Now (θ) 229.6°
Sep first 0.5 Sep last 0.51 Sep. Now (ρ) 0.428"
Mag pri 4.62 Mag sec 6.04 delta mag (ΔM) 1.42 Spectral class G8III (yellow)
Pri motion ra -118 Sec motion ra
Pri motion dec -101 Sec motion dec
Notes N O (See Notes, Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Name Bet LMi Constellation Leo Minor SAO 62053 HIP 51233
Tycho2 2517-01209-1 Gaia DR2 754644862217331584 HD 90537 HR 4100
GC 14358 ADS 7780 BD BD+37 2080 Bayer Beta Leonis Minoris
Bayer name Bet LMi Flamsteed 31 Leonis Minoris Flamsteed name 31 LMi FK5 390
Distance 47.19 Distance ly 153.93 Bayer greek β LMi




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 Notesn ReferenceWaX2020
Equinox Last observation Grade2(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


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.



 
 


wds10279%2B3642d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic