Phi4 Ceti
Star in the constellation Cetus
Phi4 Ceti is a solitary,[ 7] orange-hued star in the equatorial constellation Cetus . It is faintly visible to the naked eye with an apparent visual magnitude of 5.61.[ 2] Based upon an annual parallax shift of 9.76 mas as seen from Earth, it is located approximately 334 light years from the Sun . At that distance, the visual magnitude of the star is diminished by an extinction factor of 0.10 due to interstellar dust ,[ 4] giving it an absolute magnitude of 0.70.[ 5] It is drifting closer with a radial velocity of −19 km/s.[ 4]
This is an evolved G-type giant star with a stellar classification of G8 III.[ 3] At the estimated age of 1.5 billion years,[ 4] is a red clump giant on the horizontal branch , which indicates it is generating energy through helium fusion at its core .[ 5] The star has about 1.76[ 4] times the mass of the Sun and has expanded to 11 times the Sun's radius .[ 1] It is radiating 60 times the solar luminosity from its photosphere at an effective temperature of 4,903 K.[ 4]
References
^ a b c d e f g h 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 Corben, P. M.; Stoy, R. H. (1968), "Photoelectric Magnitudes and Colours for Bright Southern Stars", Monthly Notes of the Astronomical Society of Southern Africa , 27 : 11, Bibcode :1968MNSSA..27...11C .
^ a b Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey , 5 , Ann Arbor, Michigan: Department of Astronomy, University of Michigan, Bibcode :1999MSS...C05....0H .
^ a b c d e f g Jofré, E.; et al. (2015), "Stellar parameters and chemical abundances of 223 evolved stars with and without planets", Astronomy & Astrophysics , 574 : A50, arXiv :1410.6422 , Bibcode :2015A&A...574A..50J , doi :10.1051/0004-6361/201424474 , S2CID 53666931 , A50.
^ a b c Liu, Y. J.; et al. (2007), "The abundances of nearby red clump giants", Monthly Notices of the Royal Astronomical Society , 382 (2): 553–66, Bibcode :2007MNRAS.382..553L , doi :10.1111/j.1365-2966.2007.11852.x .
^ "phi04 Cet" . SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2017-04-22 .
^ Eggleton, P. P.; Tokovinin, A. A. (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 , S2CID 14878976 .