Beta Leonis Minoris

β Leonis Minoris
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
ConstellationLeo Minor
ComponentAB
Right ascension10h 27m10h 27m
 52.998s53.006s
Declination+36° 42′[1]+36° 42′[2]
 25.95″26.01″
Apparent magnitude (V)4.40[3]6.12[3]
 4.215[4]
Characteristics
Spectral typeG8III-IV[3]F8IV[3]
U-B color index+0.64[3]
B-V color index+0.90[3]
V-R color index0.5[4]
R-I color index+0.46[3]
Astrometry
Proper motion: 
RA (μα cos δ) −134.15[1] mas/yr −102.97[2] mas/yr 
Dec. (μδ) −113.57[1] mas/yr −95.00[2] mas/yr 
Parallax (π)22.34 ± 0.87[4] mas
Distance146 ± 6 ly
(45 ± 2 pc)
Absolute magnitude (MV)0.96[5]
Details
Mass~2[6] M☉1.35[6] M☉
Radius7.8[6] R☉2[6] R☉
Luminosity36[6] L☉5.8[6] L☉
Temperature5075[6] K6200[6] K
Orbit[7]
Period (P)38.62 y
Semimajor axis (a)0.363″
Eccentricity (e)0.668
Inclination (i)79.1°
Longitude of node (Ω)41.5°
Periastron epoch (T)B1999.15
Argument of periastron (ω)
(secondary)		29.8°
Database references
SIMBADdata
Other designations
β LMi, Beta Leonis Minoris, Beta LMi, 31 Leonis Minoris, 31 LMi, ADS 7780 AB, BD+37 2080, CCDM J10279+3642AB, FK5 390, GC 14358, HD 90537, HIP 51233, HR 4100, PPM 75233, SAO 62053, WDS 10279+3642AB.[4][3][8]

Coordinates: 10h 27m 53s, +36° 42′ 26″

Beta Leonis Minoris (Beta LMi, β Leonis Minoris, β LMi) is a binary star in the constellation of Leo Minor. It has an overall apparent visual magnitude of approximately 4.215.[4] Although it is the only star in Leo Minor with a Bayer designation, it is only the second brightest star in the constellation (the brightest is 46 Leonis Minoris).[6]

References

  1. ↑ 1.0 1.1 1.2 HIP 51233, record for component 1, Hipparcos catalogue; CDS ID I/239.
  2. ↑ 2.0 2.1 2.2 HIP 51233, record for component 2, Hipparcos catalogue; CDS ID I/239.
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 HR 4100, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line October 1, 2008.
  4. ↑ 4.0 4.1 4.2 4.3 4.4 HD 90537 -- Spectroscopic binary, database entry, SIMBAD. Accessed on line October 1, 2008.
  5. ↑ From apparent magnitude and parallax.
  6. ↑ 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 Beta LMi, Stars, Jim Kaler. Accessed on line October 2, 2008.
  7. ↑ Entry 10279+3642, Sixth Catalog of Orbits of Visual Binary Stars, United States Naval Observatory. Accessed on line October 1, 2008.
  8. ↑ Entry 10279+3642, The Washington Double Star Catalog, United States Naval Observatory. Accessed on line October 1, 2008.