46 Leonis Minoris

From Wikipedia, the free encyclopedia
Jump to: navigation, search
46 Leonis Minoris
Leo Minor constellation map.svg
Red circle.svg

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] (3.79 - 3.84[3])
Spectral type K0+ III-IV[4]
Proper motion (μ) RA: +92.02[1] mas/yr
Dec.: –285.82[1] mas/yr
Parallax (π) 34.38 ± 0.21[1] mas
Distance 94.9 ± 0.6 ly
(29.1 ± 0.2 pc)
Absolute magnitude (MV) +1.45[5]
Mass 1.69[6] M
Radius 8.22 ± 0.22[2] R
Luminosity 34 ± 2[2] L
Surface gravity (log g) 2.96[2] cgs
Temperature 4,670[2] K
Metallicity [Fe/H] −0.20[7] dex
Rotational velocity (v sin i) 1.81[8] km/s
Age 6.76[9] Gyr
Other designations
46 LMi, BD+34 2172, FK5 412, HD 94264, HIP 53229, HR 4247, SAO 62297
Database references

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.[10]

Its proper name is derived from the Latin "the Chief (Star of Leo Minor)".[11] The name may originally have referred to 37 Leonis Minoris, and later mistransfered to this star.[12] It is known as 勢四, "the Fourth (Star) of the Eunuch", in traditional Chinese astronomy.[citation needed]

46 LMi has spectral class K0+III-IV and is of magnitude 3.83. It is a red clump giant.[9] Its distance from Earth is approximately 95 light years. It is a suspected variable with an amplitude of about 0.05 magnitudes.[3]

See also[edit]


  1. ^ a b c d e van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752Freely accessible, doi:10.1051/0004-6361:20078357 
  2. ^ a b c d e Piau, L.; et al. (February 2011), "Surface convection and red-giant radius measurements", Astronomy and Astrophysics, 526: A100, Bibcode:2011A&A...526A.100P, arXiv:1010.3649Freely accessible, doi:10.1051/0004-6361/201014442 
  3. ^ a b Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S. 
  4. ^ Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series (ISSN 0067-0049). 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373. 
  5. ^ Mullan, D. J.; MacDonald, J. (2003). "Onset of Mass Loss in Red Giants: Association with an Evolutionary Event". The Astrophysical Journal. 591 (2): 1203. Bibcode:2003ApJ...591.1203M. doi:10.1086/375446. 
  6. ^ Lyubimkov, L. S.; Poklad, D. B. (2014). "Determining the effective temperatures of G- and K-type giants and supergiants based on observed photometric indices". Kinematics and Physics of Celestial Bodies. 30 (5): 244. Bibcode:2014KPCB...30..244L. arXiv:1412.6950Freely accessible. doi:10.3103/S0884591314050055. 
  7. ^ Wittenmyer, Robert A.; Gao, Dongyang; Hu, Shao Ming; Villaver, Eva; Endl, Michael; Wright, Duncan (2015). "The Weihai Observatory Search for Close-in Planets Orbiting Giant Stars". Publications of the Astronomical Society of Pacific. 127 (956): 1021. Bibcode:2015PASP..127.1021W. arXiv:1507.06051Freely accessible. doi:10.1086/683258. 
  8. ^ Hekker, S.; Meléndez, J. (2007). "Precise radial velocities of giant stars. III. Spectroscopic stellar parameters". Astronomy and Astrophysics. 475 (3): 1003. Bibcode:2007A&A...475.1003H. doi:10.1051/0004-6361:20078233. 
  9. ^ a b Soubiran, C.; Bienaymé, O.; Mishenina, T. V.; Kovtyukh, V. V. (2008). "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants". Astronomy and Astrophysics. 480: 91. Bibcode:2008A&A...480...91S. arXiv:0712.1370Freely accessible. doi:10.1051/0004-6361:20078788. 
  10. ^ Wagman, Morton (2003). Lost Stars. Blacksburg, Virginia: McDonald and Woodward. ISBN 0-939923-78-5. 
  11. ^ 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. [1]
  12. ^ Leo Minor: The little lion- Ian Ridpath's Star Tales