Star in the constellation of Hydra
HD 85951 (HR 3923 ), formally namedFelis /ˈ f iː l ɪ s [ 13] [ 14] star in theconstellation Hydra . It has anapparent magnitude of 4.94,[ 2] naked eye under ideal conditions. Based onparallax measurements, the object is about 570light-years away from theSun [ 1] radial velocity ofkm/s [ 5]
HD 85951 was the brightest star in the now-obsoleteconstellation ofFelis .[ 15] Working Group on Star Names (WGSN)[ 16] Felis for this star on 1 June 2018 and it is now so included in the List of IAU-approved Star Names.[ 13]
This an evolvedred giant with astellar classification of K5 III.[ 4] asymptotic giant branch ,[ 3] hydrogen andhelium shells around an inertcarbon core . At present Felis has 6.4 times themass of the Sun [ 7] radius ofR ☉ [ 8] bolometric luminosity 721 times that of theSun [ 9] photosphere at an effective temperature ofK [ 10] iron abundance 66% that of the Sun, making it metal deficient.
^a b c d e Brown, A. G. A. ; et al. (Gaia collaboration) (2021)."Gaia Early Data Release 3: Summary of the contents and survey properties" .Astronomy & Astrophysics 649 : A1.arXiv :2012.01533 Bibcode :2021A&A...649A...1G .doi :10.1051/0004-6361/202039657 S2CID 227254300 . (Erratum: doi :10.1051/0004-6361/202039657e ) . Gaia EDR3 record for this source atVizieR .^a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system".CDS/ADC Collection of Electronic Catalogues .2237 .Bibcode :2002yCat.2237....0D . ^a b Eggen, Olin J. (July 1992)."Asymptotic giant branch stars near the sun" .The Astronomical Journal .104 : 275.Bibcode :1992AJ....104..275E .doi :10.1086/116239 ISSN 0004-6256 . ^a b Houk, N.; Smith-Moore, M. (1988).Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume 4, Declinations -26° to -12° . Vol. 4.Bibcode :1988mcts.book.....H . ^a b 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 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 .^a b 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 ISSN 0004-6256 . ^a b Brown, A. G. A. ; et al. (Gaia collaboration) (August 2018)."Gaia Data Release 2: Summary of the contents and survey properties" .Astronomy & Astrophysics 616 . A1.arXiv :1804.09365 Bibcode :2018A&A...616A...1G doi :10.1051/0004-6361/201833051 Gaia DR2 record for this source atVizieR .^a b c d Arentsen, Anke; Prugniel, Philippe; Gonneau, Anais; Lançon, Ariane; Trager, Scott; Peletier, Reynier; Lyubenova, Mariya; Chen, Yan-Ping; Falcón Barroso, Jesús; Sánchez Blázquez, Patricia; Vazdekis, Alejandro (July 2019)."Stellar atmospheric parameters for 754 spectra from the X-shooter Spectral Library" .Astronomy & Astrophysics .627 : A138.arXiv :1907.06391 Bibcode :2019A&A...627A.138A .doi :10.1051/0004-6361/201834273 eISSN 1432-0746 .ISSN 0004-6361 . ^ Gould, Benjamin Apthorp (January 1879). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas".Resultados del Observatorio Nacional Argentino .1 .Bibcode :1879RNAO....1.....G . ^ "HD 85951" .SIMBAD Centre de données astronomiques de Strasbourg . Retrieved30 September 2012 .^a b "Naming Stars" . IAU.org. Retrieved18 June 2018 .^ 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 . ^ "Star Tales Felis" . Retrieved16 January 2021 .^ "IAU Working Group on Star Names (WGSN)" . Retrieved22 May 2016 .
