Beta Leonis Minoris

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β Leonis Minoris
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Leo Minor
A
Right ascension 10h 27m 52.998s
Declination +36° 42′ 25.95″[1]
Apparent magnitude (V) 4.40;[2] 4.215 (system)[3]
B
Right ascension 10h 27m 53.006s
Declination +36° 42′ 26.01″[4]
Apparent magnitude (V) 6.12[2]
Characteristics
U−B color index +0.64[2]
B−V color index +0.90[2]
V−R color index 0.5[3]
R−I color index +0.46[2]
A
Spectral type G8III-IV[2]
B
Spectral type F8IV[2]
Astrometry
A
Proper motion (μ) RA: −134.15[1] mas/yr
Dec.: −113.57[1] mas/yr
Parallax (π) 22.34 ± 0.87[3] mas
Distance 146 ± 6 ly
(45 ± 2 pc)
Absolute magnitude (MV) 0.96[5]
B
Proper motion (μ) RA: −102.97[4] mas/yr
Dec.: −95.00[4] mas/yr
Orbit[6]
Period (P) 38.62 y
Semi-major axis (a) 0.363
Eccentricity (e) 0.668
Inclination (i) 79.1°
Longitude of the node (Ω) 41.5°
Periastron epoch (T) B1999.15
Argument of periastron (ω)
(secondary)
29.8°
Details
A
Mass ~2[7] M
Radius 7.8[7] R
Luminosity (bolometric) 36[7] L
Temperature 5075[7] K
B
Mass 1.35[7] M
Radius 2[7] R
Luminosity (bolometric) 5.8[7] L
Temperature 6200[7] K
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.[2][3][8]
Database references
SIMBAD data

Coordinates: Sky map 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.[3] 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).[7]

References[edit]

  1. ^ a b c HIP 51233, record for component 1, Hipparcos catalogue; CDS ID I/239.
  2. ^ a b c d e f g h 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.
  3. ^ a b c d e HD 90537 -- Spectroscopic binary, database entry, SIMBAD. Accessed on line October 1, 2008.
  4. ^ a b c HIP 51233, record for component 2, Hipparcos catalogue; CDS ID I/239.
  5. ^ System; From apparent magnitude and parallax.
  6. ^ Entry 10279+3642, Sixth Catalog of Orbits of Visual Binary Stars, United States Naval Observatory. Accessed on line October 1, 2008.
  7. ^ a b c d e f g h i Beta LMi, Stars, Jim Kaler. Accessed on line October 2, 2008.
  8. ^ Entry 10279+3642, The Washington Double Star Catalog, United States Naval Observatory. Accessed on line October 1, 2008.