37 Leonis Minoris

37 Leonis Minoris is a single,[9] yellow-hued star in the northern constellation of Leo Minor. It is faintly visible to the naked eye with an apparent visual magnitude of 4.68.[2] The star is moving closer to the Sun with a heliocentric radial velocity of −8 km/s.[2] The annual parallax shift of 5.58±0.24 mas[1] provides a distance estimate of roughly 580 light years.

37 Leonis Minoris
Observation data
Epoch J2000      Equinox J2000
Constellation Leo Minor
Right ascension  11h 01m 49.67462s[1]
Declination −02° 29′ 04.5007″[1]
Apparent magnitude (V) 4.68[2]
Characteristics
Spectral type G2.5 IIa[3]
B−V color index 0.823±0.008[2]
Astrometry
Radial velocity (Rv)−8.0±0.3[2] km/s
Proper motion (μ) RA: +9.76[1] mas/yr
Dec.: −35.56[1] mas/yr
Parallax (π)5.58 ± 0.24[1] mas
Distance580 ± 30 ly
(179 ± 8 pc)
Absolute magnitude (MV)−1.84[4]
Details
Mass3.72[5] M☉
Radius31[6] R☉
Luminosity438.33[2] L☉
Surface gravity (log g)2.22[5] cgs
Temperature5,468[5] K
Metallicity [Fe/H]0.03[5] dex
Rotational velocity (v sin i)6.4[7] km/s
Age200[7] Myr
Other designations
37 LMi, BD+32° 2061, FK5 1275, HD 92125, HIP 52098, HR 4166, SAO 62173[8]
Database references
SIMBADdata

The Bright Star Catalogue lists this star with a stellar classification of G2.5 IIa,[3] indicating it is an evolved G-type bright giant. Gray et al. (2001) gave it a class of G1 II,[10] while Keenan and McNeil (1989) assigned this star to the giant class G2.5 IIIa.[11] It has an estimated 3.72[5] times the mass of the Sun and about 31[6] times the Sun's radius. The star is around 200[7] million years old with a projected rotational velocity of 6.4 km/s.[7] It is radiating about 438[2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,468 K.[5]

References
  1. van Leeuwen, F. (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. Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
  3. Warren, W. H., Jr.; Hoffleit, D. (March 1987), "The Bright Star Catalogue", Bulletin of the American Astronomical Society (5th revised ed.), 19: 733, Bibcode:1987BAAS...19..733W.
  4. Kovtyukh, V. V.; Chekhonadskikh, F. A.; Luck, R. E.; Soubiran, C.; Yasinskaya, M. P.; Belik, S. I. (2010), "Accurate luminosities for F-G supergiants from FeII/FeI line depth ratios", Monthly Notices of the Royal Astronomical Society, 408 (3): 1568–75, Bibcode:2010MNRAS.408.1568K, doi:10.1111/j.1365-2966.2010.17217.x
  5. Liu, Y. J.; et al. (April 2014), "The Lithium Abundances of a Large Sample of Red Giants", The Astrophysical Journal, 785 (2): 12, arXiv:1404.1687, Bibcode:2014ApJ...785...94L, doi:10.1088/0004-637X/785/2/94, 94.
  6. Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367: 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.
  7. Takeda, Yoichi; Tajitsu, Akito (2014), "Spectroscopic study on the beryllium abundances of red giant stars", Publications of the Astronomical Society of Japan, 66 (5): 91, arXiv:1406.7066, Bibcode:2014PASJ...66...91T, doi:10.1093/pasj/psu066.
  8. "37 LMi". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-03-01.
  9. Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
  10. Gray, R. O.; et al. (April 2001), "The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars", The Astronomical Journal, 121 (4): 2148–2158, Bibcode:2001AJ....121.2148G, doi:10.1086/319956.
  11. Keenan, P.; McNeil, R. (October 1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series, 71: 245–266, Bibcode:1989ApJS...71..245K, doi:10.1086/191373.
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