Star in the constellation of Cetus
63 Ceti is a star in the constellation of Cetus , located just over a degree south of the celestial equator . With an apparent magnitude of about 5.9,[ 2] the star is barely visible to the naked eye (see Bortle scale ) as a dim, orange-hued point of light. Parallax estimates put it at a distance of about 390 light years (129 parsecs ) away from the Earth ,[ 1] and it is drifting further away with a radial velocity of 28 km/s.[ 4]
63 Ceti has a spectral type of K0III,[ 3] implying an aging K-type giant star . These types of stars are generally reddish-colored stars with spectral types from K to M , with radii that are 10 to 100 times larger than the Sun .[ 8] 63 Ceti fits this description, with a radius about 11 times larger than the Sun, a mass of about 1.85 times the Sun, and an effective temperature of 4940 K .[ 4] 63 Ceti is a red clump giant, indicating it is currently at the horizontal branch , a stage in stellar evolution , and is generating energy through core helium fusion . It is close to a billion years old[ 6] and is radiating 64 times the luminosity of the Sun from its photosphere at an effective temperature of 4,940 K.[ 4]
References
^ a b c d e f g 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 .
^ a b c d Johnson, H. L. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory . 4 : 99. Bibcode :1966CoLPL...4...99J .
^ a b Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5". Michigan Spectral Survey . 5 : 0. Bibcode :1999MSS...C05....0H .
^ a b c d e Jones, M. I.; Jenkins, J. S.; Rojo, P.; Melo, C. H. F. (2011). "Study of the impact of the post-MS evolution of the host star on the orbits of close-in planets". Astronomy & Astrophysics . 536 : A71. arXiv :1110.6459 . Bibcode :2011A&A...536A..71J . doi :10.1051/0004-6361/201117887 . S2CID 55769003 .
^ 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 .
^ a b Gallenne, A.; et al. (August 2018). "Fundamental properties of red-clump stars from long-baseline H-band interferometry". Astronomy & Astrophysics . 616 : 12. arXiv :1806.09572 . Bibcode :2018A&A...616A..68G . doi :10.1051/0004-6361/201833341 . S2CID 119331707 . A68.
^ "* 63 Cet" . SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 21 March 2017 .
^ David Darling. "Red giant" . The Internet Encyclopedia of Science . Retrieved 21 March 2017 .