54 Ceti

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]

54 Ceti

Location of 54 Ceti (HD 11257) near the constellation boundary of Aries (pink). Nearby are the constellations of Pisces (blue) and Cetus (green).
Observation data
Epoch J2000      Equinox J2000
Constellation Aries
Right ascension 01h 50m 51.97256s[1]
Declination +11° 02′ 36.1621″[1]
Apparent magnitude (V) 5.94[2]
Characteristics
Spectral type F2 Vw[3]
U−B color index –0.03[2]
B−V color index +0.30[2]
R−I color index 0.17
Astrometry
Radial velocity (Rv)+11.1[4] km/s
Proper motion (μ) RA: –69.464[1] mas/yr
Dec.: –27.522[1] mas/yr
Parallax (π)23.7942 ± 0.1026 mas[1]
Distance137.1 ± 0.6 ly
(42.0 ± 0.2 pc)
Absolute magnitude (MV)2.80[5]
Details
Mass1.48[6] M☉
Radius1.62+0.08
−0.05[1] R☉
Luminosity6.01±0.03[1] L☉
Surface gravity (log g)4.50[3] cgs
Temperature7,099[3] K
Metallicity [Fe/H]–0.20[3] dex
Rotational velocity (v sin i)29[7] km/s
Age582[6] Myr
Other designations
54 Cet, NSV 635, BD+10°252, HD 11257, HIP 8588, HR 534, SAO 92659[8]
Database references
SIMBADdata

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. 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. 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. 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. 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. 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. 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. 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. "54 Cet". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-08-18.{{cite web}}: CS1 maint: postscript (link)
  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. Hoffleit, D. (July 1979), "Discordances in star designations", Bulletin d'Information du Centre de Données Stellaires, 17 (17): 38, Bibcode:1979BICDS..17...38H.
  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. 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. 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.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.