Star in the constellation of Leo Minor
23 Leonis Minoris Location of 23 LMi (circled)
Observation dataEpoch J2000.0 Equinox J2000.0 (ICRS ) Constellation Leo Minor Right ascension 10h 16m 14.43013s [ 1] Declination +29° 18′ 37.7075″[ 1] Apparent magnitude (V)5.49± 0.01[ 2] Characteristics Evolutionary stage main sequence star [ 3] Spectral type A0 Vn[ 4] U−Bcolor index 0.00[ 5] B−Vcolor index +0.01[ 5] Astrometry Radial velocity (Rv )16.4± 2.8[ 6] km/s Proper motion (μ)RA: −70.765mas /yr [ 1] Dec.: −22.844mas /yr [ 1] Parallax (π)11.6971± 0.0923 mas [ 1] Distance 279 ± 2 ly pc ) Absolute magnitude (MV )+0.98[ 7] Details Mass 2.55[ 8] M ☉ Radius 2.38± 0.23[ 9] R ☉ Luminosity 44.3± 2.1[ 3] L ☉ Surface gravity (log g )4.14± 0.07[ 10] cgs Temperature 10,377± 353[ 8] K Metallicity [Fe/H] 0.00[ 11] dex Rotational velocity (v sin i )235± 15[ 12] Age 285+24 −22 [ 13] Myr Other designations 7 H. Leonis Minoris ,[ 14] 23 LMi ,AG +29°1104BD +30°1981FK5 2823GC 14086HD 88960HIP 50303HR 4024SAO 81258[ 15] Database references SIMBAD data
23 Leonis Minoris (23 LMi) is a solitary,[ 16] star located in the northernconstellation Leo Minor . It is positioned 7° south and 11" west fromβ Leonis Minoris . It is rarely called 7 H. Leonis Minoris, which is itsHevelius designation.[ 14]
The object has anapparent magnitude of 5.49, allowing it to be faintly visible to thenaked eye . Based onparallax measurements from theGaia satellite , it is estimated to be 279light years distant. 23 LMi is receding from theSolar System with a fairly constrainedradial velocity ofkm/s [citation needed At its current distance, the star's brightness is diminished by a tenth of amagnitude due to interstellar dust.[ 17] Hyades moving group and it is considered a probable member.[ 18]
23 LMi was catalogued as achemically peculiar star with astellar classification of A0 Vpn due to a lack ofmagnesium in its spectrum byHelmut Abt andNidia Irene Morrell .[ 12] A.P. Cowley and colleagues instead listed it as an ordinaryA-type main-sequence star with nebulousabsorption lines as a result of rapid rotation, with the class being A0 Vn.[ 4] mass of the Sun [ 8] million years old,[ 13] main sequence lifetime.[ 3] radius of the Sun [ 9] luminosity 44.3 times that of theSun [ 3] photosphere at aneffective temperature ofK [ 8] projected rotational velocity ofkm/s [ 12]
^a b c d 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 atVizieR .^ 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 . ^a b c d Zorec, J.; Royer, F. (January 2012)."Rotational velocities of A-type stars IV: Evolution of rotational velocities" .Astronomy & Astrophysics .537 : A120.arXiv :1201.2052 Bibcode :2012A&A...537A.120Z .doi :10.1051/0004-6361/201117691 eISSN 1432-0746 .ISSN 0004-6361 .S2CID 55586789 . ^a b Cowley, A.; Cowley, C.; Jaschek, M.; Jaschek, C. (April 1969)."A study of the bright stars. I. A catalogue of spectral classifications" .The Astronomical Journal .74 : 375.Bibcode :1969AJ.....74..375C .doi :10.1086/110819 ISSN 0004-6256 . ^a b Oja, T. (April 1983). "UVB photometry of FK4 and FK4 Supplement stars".Astronomy and Astrophysics Supplement Series .52 :131– 134.Bibcode :1983A&AS...52..131O .ISSN 0365-0138 . ^ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35,495 Hipparcos stars in a common system".Astronomy Letters .32 (11):759– 771.arXiv :1606.08053 Bibcode :2006AstL...32..759G .doi :10.1134/S1063773706110065 .eISSN 1562-6873 .ISSN 1063-7737 .S2CID 119231169 . ^ 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 . ^a b c d David, Trevor J.; Hillenbrand, Lynne A. (12 May 2015)."The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets" .The Astrophysical Journal .804 (2): 146.arXiv :1501.03154 Bibcode :2015ApJ...804..146D .doi :10.1088/0004-637X/804/2/146 eISSN 1538-4357 . ^a b Stassun, Keivan G.; Oelkers, Ryan J.; Pepper, Joshua; et al. (20 August 2018)."TheTESS Input Catalog and Candidate Target List" .The Astronomical Journal .156 (3): 102.arXiv :1706.00495 Bibcode :2018AJ....156..102S .doi :10.3847/1538-3881/aad050 eISSN 1538-3881 . ^ Allende Prieto, C.; Lambert, D. L. (December 1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures".Astronomy and Astrophysics .352 :555– 562.arXiv :astro-ph/9911002 Bibcode :1999A&A...352..555A .ISSN 0004-6361 . ^ Gontcharov, G. A. (December 2012)."Dependence of kinematics on the age of stars in the solar neighborhood" .Astronomy Letters .38 (12):771– 782.arXiv :1606.08814 Bibcode :2012AstL...38..771G .doi :10.1134/S1063773712120031 eISSN 1562-6873 .ISSN 1063-7737 . ^a b c Abt, Helmut A.; Morrell, Nidia I. (July 1995)."The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars" .The Astrophysical Journal Supplement Series .99 : 135.Bibcode :1995ApJS...99..135A .doi :10.1086/192182 ISSN 0067-0049 . ^a b Grosbol, P. J. (June 1978). "Space velocities and ages of nearby early-type stars".Astronomy and Astrophysics Supplement Series 32 :409– 421.Bibcode :1978A&AS...32..409G .ISSN 0365-0138 . ^a b Verbunt, F.; van Gent, R. H. (June 2010)."The star catalogue of Hevelius" .Astronomy and Astrophysics .516 : A29.Bibcode :2010A&A...516A..29V .doi :10.1051/0004-6361/201014003 eISSN 1432-0746 .ISSN 0004-6361 . ^ "23 LMi" .SIMBAD Centre de données astronomiques de Strasbourg . Retrieved14 November 2022 .^ 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 . ^ 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 . ^ Eggen, Olin J. (October 1992)."The Hyades supercluster in the FK5" .The Astronomical Journal .104 : 1482.Bibcode :1992AJ....104.1482E .doi :10.1086/116333 ISSN 0004-6256 .
