28 Leonis Minoris

28 Leonis Minoris (28 LMi) is a solitary,[10] orange hued star located in the northern constellation Leo Minor, the lesser lion. It has an apparent magnitude of 5.5,[2] allowing it to be faintly visible to the naked eye. Based on parallax measurements from the Gaia satellite, it is estimated to be 480 light years distant.[1] 28 LMi is approaching the Solar System with a heliocentric radial velocity of −24 km/s.[5] At its current distance, the star brightness is diminished by 0.14 magnitudes due to interstellar dust. [11]

28 Leonis Minoris
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Leo Minor
Right ascension 10h 24m 08.60391s[1]
Declination +33° 43′ 06.7069″[1]
Apparent magnitude (V) 5.50±0.01[2]
Characteristics
Spectral type K1 III[3]
B−V color index +1.18[4]
Astrometry
Radial velocity (Rv)−24.3±0.2[5] km/s
Proper motion (μ) RA: −14.460 mas/yr
Dec.: −2.770 mas/yr
Parallax (π)6.7945 ± 0.091 mas[1]
Distance480 ± 6 ly
(147 ± 2 pc)
Absolute magnitude (MV)−0.05[6]
Details
Mass1.19[7] M☉
Radius22.6[1] R☉
Luminosity207[1] L☉
Surface gravity (log g)1.80[7] cgs
Temperature4,580±122[8] K
Metallicity [Fe/H]−0.04[1] dex
Age202[1] Myr
Other designations
28 LMi, AG+33°1015, BD+34°2123, GC 14280, HD 90040, HIP 50935, HR 4081, SAO 62019[9]
Database references
SIMBADdata

This is a population II[12] giant star with a stellar classification of K1 III.[3] It has a comparable mass to the Sun[7] but has expanded to 22.6 times its girth.[1] It radiates 207 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 4,580 K.[8] It has an iron abundance 90% of the Sun's, making it slightly metal deficient.[1]

References
  1. Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
  3. Adams, Walter S.; Joy, Alfred H.; Humason, Milton L.; Brayton, Ada Margaret (April 1935). "The Spectroscopic Absolute Magnitudes and Parallaxes of 4179 Stars". The Astrophysical Journal. 81: 187. Bibcode:1935ApJ....81..187A. doi:10.1086/143628. eISSN 1538-4357. ISSN 0004-637X.
  4. Haggkvist, L.; Oja, T. (1970). "Results of BV photometry 1969-70 (Uppsala refractor)". Private Communication. Bibcode:1970Priv.........0H.
  5. Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (January 2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. S2CID 17804304.
  6. Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
  7. Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. eISSN 1432-0746. ISSN 0004-6361.
  8. Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. eISSN 1538-3881. hdl:1721.1/124721. S2CID 166227927.
  9. "28 LMi". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved November 18, 2022.
  10. Eggleton, P. P.; Tokovinin, A. A. (11 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. eISSN 1365-2966. ISSN 0035-8711.
  11. Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv:1709.01160. Bibcode:2017MNRAS.472.3805G. doi:10.1093/mnras/stx2219. eISSN 1365-2966. ISSN 0035-8711.
  12. Bartkevicius, A.; Lazauskaite, R. (1 January 1997). "Classification of Population II Stars in the Vilnius Photometric System. II. Results". Open Astronomy. 6 (4): 499. Bibcode:1997BaltA...6..499B. doi:10.1515/astro-1997-0402. eISSN 2543-6376.
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