HD 85951

Nowadays, HD 85951 is a topic that has gained great relevance in today's society. Since its emergence, HD 85951 has captured the attention of experts, academics, and people of all ages. Whether due to its impact in the social, economic or technological sphere, HD 85951 has positioned itself as a topic of general interest that deserves to be analyzed and discussed in depth. In this article, we will explore the different facets of HD 85951, its importance in today's world and the possible future scenarios that could arise from its evolution. Through a detailed analysis, we will address the most relevant aspects of HD 85951 to understand its influence on our daily lives and society as a whole.

HD 85951
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Hydra
Right ascension 09h 54m 52.2045s[1]
Declination −19° 00′ 33.620″[1]
Apparent magnitude (V) 4.94[2]
Characteristics
Evolutionary stage AGB[3]
Spectral type K5 III[4]
U−B color index +1.93[2]
B−V color index +1.57[2]
Astrometry
Radial velocity (Rv)50±4.2[5] km/s
Proper motion (μ) RA: −45.386 mas/yr[1]
Dec.: −40.456 mas/yr[1]
Parallax (π)5.6789±0.2214 mas[1]
Distance570 ± 20 ly
(176 ± 7 pc)
Absolute magnitude (MV)−1.43[6]
Details
Mass6.40+1.2
−0.4[7] M☉
Radius56.7[8] R☉
Luminosity721±32[9] L☉
Surface gravity (log g)1.3±0.04[10] cgs
Temperature3,875±39[10] K
Metallicity −0.18±0.07[10] dex
Other designations
Felis, 183 G. Hydrae[11], BD−18° 2810, FK5 373, GC 13644, HIP 48615, HR 3923, SAO 155588[12]
Database references
SIMBADdata

HD 85951 (HR 3923), formally named Felis /ˈfiːlɪs/,[13] is a solitary[14] orange hued star in the constellation Hydra. It has an apparent magnitude of 4.94,[2] making it faintly visible to the naked eye under ideal conditions. Based on parallax measurements, the object is about 570 light-years away from the Sun[1] and is receding with a heliocentric radial velocity of 50 km/s.[5]

Nomenclature

HD 85951 was the brightest star in the now-obsolete constellation of Felis.[15] In 2016, the IAU organized a Working Group on Star Names (WGSN)[16] to catalog and standardize proper names for stars. The WGSN approved the name Felis for this star on 1 June 2018 and it is now so included in the List of IAU-approved Star Names.[13]

Properties

This an evolved red giant with a stellar classification of K5 III.[4] It is currently on the asymptotic giant branch,[3] generating energy via fusion of hydrogen and helium shells around an inert carbon core. At present Felis has 6.4 times the mass of the Sun[7] and due to its evolved status, has an enlarged radius of 56.7 R☉.[8] It radiates at a bolometric luminosity 721 times that of the Sun[9] from its photosphere at an effective temperature of 3,875 K.[10] Felis has an iron abundance 66% that of the Sun, making it metal deficient.

References

  1. ^ 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 at VizieR.
  2. ^ 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.
  3. ^ 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.
  4. ^ 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.
  5. ^ 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.
  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. ^ 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 at VizieR.
  8. ^ 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.
  9. ^ 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 at VizieR.
  10. ^ 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.
  11. ^ 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.
  12. ^ "HD 85951". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 30 September 2012.
  13. ^ a b "Naming Stars". IAU.org. Retrieved 18 June 2018.
  14. ^ 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.
  15. ^ "Star Tales Felis". Retrieved 16 January 2021.
  16. ^ "IAU Working Group on Star Names (WGSN)". Retrieved 22 May 2016.