Star in the constellation of Camelopardalis
HD 68375 (HR 3216 ) is a solitary star in the northern circumpolar constellation Camelopardalis . It is faintly visible to the naked eye with an apparent magnitude of 5.54 and is estimated to be 289 light years distant. However, it is receding with a heliocentric radial velocity of 4.33 km/s .
HD 68375 has a stellar classification of G8 III, indicating that it is a red giant . It is currently on the horizontal branch , generating energy via fusion inside a helium core . Specifically, it is a red clump star, at the cool end of the horizontal branch where stars with near-solar metallicity are found. After approximately 1 billion years , the star now has a radius of 9 R ☉ effective temperature of 5,078 K , giving a yellow hue. Nevertheless, it has nearly double the mass of the Sun and radiates at 49 times the luminosity of the Sun from its enlarged photosphere . HD 68375 is slightly metal deficient with a metallicity 76% that of the Sun and spins with a poorly constrained projected rotational velocity of 1.3 km/s .
References
^ 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 .doi :10.1051/0004-6361/202039657e ). Gaia EDR3 record for this source at VizieR .
^ 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 .
^ Ting, Yuan-Sen; Hawkins, Keith; Rix, Hans-Walter (3 May 2018). "A Large and Pristine Sample of Standard Candles across the Milky Way: ~100,000 Red Clump Stars with 3% Contamination" . The Astrophysical Journal . 858 (1): L7. arXiv :1803.06650 . Bibcode :2018ApJ...858L...7T . doi :10.3847/2041-8213/aabf8e . ISSN 0004-637X .
^ Cowley, A. P.; Bidelman, W. P. (February 1979). "MK spectral types for some F and G stars" . Publications of the Astronomical Society of the Pacific . 91 : 83. Bibcode :1979PASP...91...83C . doi :10.1086/130446 . eISSN 1538-3873 . ISSN 0004-6280 .
Haggkvist, L.; Oja, T. (1970). "Results of BV photometry 1969-70 (Uppsala refractor)". Private Communication . Bibcode :1970Priv.........0H .
^ Soubiran, C.; Bienaymé, O.; Mishenina, T. V.; Kovtyukh, V. V. (9 January 2008). "Vertical distribution of Galactic disk stars" . Astronomy & Astrophysics . 480 (1): 91–101. arXiv :0712.1370 . Bibcode :2008A&A...480...91S . doi :10.1051/0004-6361:20078788 . eISSN 1432-0746 . ISSN 0004-6361 .
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 . S2CID 119257644 .
^ Demarque, Pierre; Woo, Jong-Hak; Kim, Yong-Cheol; Yi, Sukyoung K. (December 2004). "Y Isochrones with an Improved Core Overshoot Treatment" . The Astrophysical Journal Supplement Series . 155 (2): 667–674. arXiv :astro-ph/0409024 . Bibcode :2004ApJS..155..667D . doi :10.1086/424966 . eISSN 1538-4365 . ISSN 0067-0049 .
^ 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 .
^ 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 .
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 .
^ Ting, Yuan-Sen; Rix, Hans-Walter (10 June 2019). "The Vertical Motion History of Disk Stars throughout the Galaxy" . The Astrophysical Journal . 878 (1): 21. arXiv :1808.03278 . Bibcode :2019ApJ...878...21T . doi :10.3847/1538-4357/ab1ea5 . eISSN 1538-4357 .
^ de Medeiros, J. R.; Mayor, M. (November 1999). "A catalog of rotational and radial velocities for evolved stars" . Astronomy and Astrophysics Supplement Series . 139 (3): 433–460. Bibcode :1999A&AS..139..433D . doi :10.1051/aas:1999401 . ISSN 0365-0138 .
"HR+3216" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved July 13, 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 .
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