54_Ceti

54 Ceti

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]

Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...

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

  1. [1]
    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.
  2. [2]
    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.
  3. [3]
    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.
  4. [4]
    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.
  5. [5]
    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.
  6. [6]
    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.
  7. [7]
    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.
  8. [8]
    "54 Cet". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-08-18.{{cite web}}: CS1 maint: postscript (link)
  9. [9]
    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.
  10. [10]
    Hoffleit, D. (July 1979), "Discordances in star designations", Bulletin d'Information du Centre de Données Stellaires, 17 (17): 38, Bibcode:1979BICDS..17...38H.
  11. [11]
    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.
  12. [12]
    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.
  13. [13]
    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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