Astronomy:46 Leonis Minoris

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Short description: Star in the constellation of Leo Minor
46 Leonis Minoris
Location of 46 Leonis Minoris (circled)
Observation data
Equinox J2000.0]] (ICRS)
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])
Characteristics
Evolutionary stage red clump[4]
Spectral type K0+ III-IV[5]
Variable type suspected[3]
Astrometry
Proper motion (μ) RA: +90.625[6] mas/yr
Dec.: −278.64[6] mas/yr
Parallax (π)32.921 ± 0.1775[6] mas
Distance99.1 ± 0.5 ly
(30.4 ± 0.2 pc)
Absolute magnitude (MV)+1.45[7]
Details[8]
Mass1.09±0.04 M☉
Radius8.21±0.06[9] R☉
Luminosity27.42±1.38 L☉
Surface gravity (log g)2.674±0.013 cgs
Temperature4,670[2] K
Metallicity [Fe/H]−0.1 dex
Rotational velocity (v sin i)1.81[10] km/s
Age8.2±1.9 Gyr
Other designations
Praecipua, 46 LMi, BD+34 2172, FK5 412, HD 94264, HIP 53229, HR 4247, SAO 62297
Database references
SIMBADdata

46 Leonis Minoris (abbreviated 46 LMi), also named Praecipua /prɪˈsɪpjʊə/,[11] is the brightest star in the constellation of Leo Minor. It is of spectral class K0+III-IV and of magnitude 3.83. It is a red clump giant.[4] Based upon parallax measurements, its distance from the Sun is approximately 99.1 light-years.[6] It is a suspected variable with an amplitude of about 0.05 magnitudes.[3]

Nomenclature

46 Leonis Minoris is the star's Flamsteed designation. It is sometimes designated "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.[12]

It bore the traditional proper name Praecipua, derived from the Latin for "the Chief (Star of Leo Minor)".[13] The name may originally have referred to 37 Leonis Minoris, and later mistakenly transferred to this star.[14] In 2016, the International Astronomical Union (IAU) organized a Working Group on Star Names (WGSN)[15] to catalog and standardize proper names for stars. The WGSN approved the name Praecipua for this star on 30 June 2017 and it is now so included in the List of IAU-approved Star Names.[11]


See also

References

  1. ↑ 1.0 1.1 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V 
  2. ↑ 2.0 2.1 Piau, L. et al. (February 2011), "Surface convection and red-giant radius measurements", Astronomy and Astrophysics 526: A100, doi:10.1051/0004-6361/201014442, Bibcode: 2011A&A...526A.100P 
  3. ↑ 3.0 3.1 3.2 Samus, N. N. 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. ↑ 4.0 4.1 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 (1): 91–101. doi:10.1051/0004-6361:20078788. Bibcode: 2008A&A...480...91S. 
  5. ↑ Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series 71: 245. doi:10.1086/191373. Bibcode: 1989ApJS...71..245K. 
  6. ↑ 6.0 6.1 6.2 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  7. ↑ Mullan, D. J.; MacDonald, J. (2003). "Onset of Mass Loss in Red Giants: Association with an Evolutionary Event". The Astrophysical Journal 591 (2): 1203. doi:10.1086/375446. Bibcode: 2003ApJ...591.1203M. 
  8. ↑ Frandsen, S.; Andersen, M. Fredslund; Brogaard, K.; Jiang, C.; Arentoft, T.; Grundahl, F.; Kjeldsen, H.; Christensen-Dalsgaard, J. et al. (2018-05-01). "The mass and age of the first SONG target: the red giant 46 LMi" (in en). Astronomy & Astrophysics 613: A53. doi:10.1051/0004-6361/201730816. ISSN 0004-6361. Bibcode: 2018A&A...613A..53F. https://www.aanda.org/articles/aa/abs/2018/05/aa30816-17/aa30816-17.html. 
  9. ↑ Baines, Ellyn K. et al. (2018), "Fundamental Parameters of 87 Stars from the Navy Precision Optical Interferometer", The Astronomical Journal 155 (1): 30, doi:10.3847/1538-3881/aa9d8b, Bibcode: 2018AJ....155...30B. 
  10. ↑ Hekker, S.; Meléndez, J. (2007). "Precise radial velocities of giant stars. III. Spectroscopic stellar parameters". Astronomy and Astrophysics 475 (3): 1003. doi:10.1051/0004-6361:20078233. Bibcode: 2007A&A...475.1003H. 
  11. ↑ 11.0 11.1 "Naming Stars". IAU.org. https://www.iau.org/public/themes/naming_stars/. 
  12. ↑ Wagman, Morton (2003). Lost Stars. Blacksburg, Virginia: McDonald and Woodward. ISBN 0-939923-78-5. 
  13. ↑ 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. 
  14. ↑ Leo Minor: The little lion- Ian Ridpath's Star Tales
  15. ↑ "IAU Working Group on Star Names (WGSN)". https://www.iau.org/science/scientific_bodies/working_groups/280/. 



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