46 Leonis Minoris

Praecipua
Diagram showing star positions and boundaries of the Leo Minor constellation and its surroundings


Location of 46 Leonis Minoris (circled)

Observation data
Epoch J2000      Equinox J2000
Constellation Leo Minor
Right ascension 10h 53m 18.70487s[1]
Declination +34° 12′ 53.5375″[1]
Apparent magnitude (V) 3.83[2]
Characteristics
Spectral type K0+III-IV
Astrometry
Proper motion (μ) RA: +92.02[1] mas/yr
Dec.: –285.82[1] mas/yr
Parallax (π)34.38 ± 0.21[1] mas
Distance94.9 ± 0.6 ly
(29.1 ± 0.2 pc)
Details
Radius8.2 ± 0.2[2] R☉
Luminosity34 ± 2[2] L☉
Surface gravity (log g)2.96[2] cgs
Temperature4,670[2] K
Other designations
46 LMi, BD+34 2172, FK5 412, HD 94264, HIP 53229, HR 4247, SAO 62297.

Praecipua is the brightest star in the constellation Leo Minor. It is sometimes known as "o LMi" (not "ο LMi"), from Bode's catalogue of 1801. It was presumably intended to be designated α, as Francis Baily decided to letter each star brighter than magnitude 4.5, but the designation was missing from his catalogue, even though the dimmer β was included.[3]

Its proper name is derived from the Latin "the Chief (Star of Leo Minor)".[4] The name may originally have referred to 37 Leonis Minoris, and later mistransfered to this star.[5]

It is known as 勢四, "the Fourth (Star) of the Eunuch", in traditional Chinese astronomy.

46 LMi has spectral class K0+III-IV and is of magnitude 3.83. Its distance from Earth is approximately 95 light years.

See also

References

  1. 1 2 3 4 5 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357
  2. 1 2 3 4 5 Piau, L.; et al. (February 2011), "Surface convection and red-giant radius measurements", Astronomy and Astrophysics 526: A100, arXiv:1010.3649, Bibcode:2011A&A...526A.100P, doi:10.1051/0004-6361/201014442
  3. ↑ Wagman, Morton (2003). Lost Stars. Blacksburg, Virginia: McDonald and Woodward. ISBN 0-939923-78-5.
  4. ↑ Allen, R. H. (1963). Star Names: Their Lore and Meaning (Reprint ed.). New York, NY: Dover Publications Inc. p. 264. ISBN 0-486-21079-0.
  5. ↑ Leo Minor: The little lion- Ian Ridpath's Star Tales


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