54 Ceti
Star in the constellation Aries
54 Ceti is an older Flamsteed designation [ 9] for a star that is now located within the constellation boundaries of Aries ,[ 10] the Ram. In the present day it is known by star catalogue identifiers like HD 11257 or HR 534 .[ 8] At an apparent visual magnitude of 5.94,[ 2] it can be seen with the naked eye. The distance to this star, as determined using parallax measurements made during the Hipparcos mission, is approximately 139 light-years (43 parsecs ), give or take a 6 light-year margin of error .[ 11] It is located near the ecliptic and hence is subject to occasional occultation by the Moon .[ 12]
This is an F-type main sequence star with a stellar classification of F2 Vw,[ 3] where the 'w' indicates weak absorption lines in the spectrum . The star is around 582[ 6] million years old with a projected rotational velocity of 29 km/s.[ 7] It has 1.5[ 6] times the mass of the Sun and 1.6[ 1] times the Sun's radius . The star is radiating six[ 1] times the luminosity of the Sun from its photosphere at an effective temperature of 7,099 K.[ 3] It is a candidate member of the Ursa Major Moving Group , which has an estimated age of 500 ± 100 million years.[ 13]
References
^ a b c d e f g h i 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.; et al. (1966). "UBVRIJKL photometry of the bright stars". Communications of the Lunar and Planetary Laboratory . 4 (99): 99. Bibcode :1966CoLPL...4...99J .
^ a b c d e f Cenarro, A. J.; et al. (January 2007), "Medium-resolution Isaac Newton Telescope library of empirical spectra - II. The stellar atmospheric parameters", Monthly Notices of the Royal Astronomical Society , 374 (2): 664–690, arXiv :astro-ph/0611618 , Bibcode :2007MNRAS.374..664C , doi :10.1111/j.1365-2966.2006.11196.x , S2CID 119428437 .
^ Wilson, Ralph Elmer (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication , Washington: Carnegie Institution of Washington , Bibcode :1953GCRV..C......0W .
^ 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 c d David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal , 804 (2): 146, arXiv :1501.03154 , Bibcode :2015ApJ...804..146D , doi :10.1088/0004-637X/804/2/146 , S2CID 33401607 .
^ a b Royer, F.; Zorec, J.; Gómez, A. E. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics , 463 (2): 671–682, arXiv :astro-ph/0610785 , Bibcode :2007A&A...463..671R , doi :10.1051/0004-6361:20065224 , S2CID 18475298 .
^ a b "54 Cet" . SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2012-08-18 .
^ Hoffleit, Dorrit (1964), Catalogue of bright stars (3rd revised ed.), New Haven, Conn.: Yale University Observatory, Bibcode :1964cbs..book.....H . See the Online Data entry for HR 534.
^ Hoffleit, D. (July 1979), "Discordances in star designations", Bulletin d'Information du Centre de Données Stellaires , 17 (17): 38, Bibcode :1979BICDS..17...38H .
^ van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics , 474 (2): 653–664, arXiv :0708.1752 , Bibcode :2007A&A...474..653V , doi :10.1051/0004-6361:20078357 , S2CID 18759600 .
^ Richichi, A.; et al. (January 2006), "The Calar Alto lunar occultation program: update and new results", Astronomy and Astrophysics , 445 (3): 1081–1088, arXiv :astro-ph/0509088 , Bibcode :2006A&A...445.1081R , doi :10.1051/0004-6361:20053901 , S2CID 14739715 .
^ Monier, R. (November 2005), "Abundances of a sample of A and F-type dwarf members of the Ursa Major Group", Astronomy and Astrophysics , 442 (2): 563–566, Bibcode :2005A&A...442..563M , doi :10.1051/0004-6361:20053222 .
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