Astronomy:54 Ceti

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Short description: Star in the constellation Aries
54 Ceti
Local 54 cet.png
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
Equinox J2000.0]] (ICRS)
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[1] mas
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

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

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 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. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 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, doi:10.1111/j.1365-2966.2006.11196.x, Bibcode: 2007MNRAS.374..664C. 
  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, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A. 
  6. ↑ 6.0 6.1 6.2 6.3 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, doi:10.1088/0004-637X/804/2/146, Bibcode: 2015ApJ...804..146D. 
  7. ↑ 7.0 7.1 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, doi:10.1051/0004-6361:20065224, Bibcode: 2007A&A...463..671R. 
  8. ↑ 8.0 8.1 "54 Cet". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=54+Cet. 
  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, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V. 
  12. ↑ Richichi, A. et al. (January 2006), "The Calar Alto lunar occultation program: update and new results", Astronomy and Astrophysics 445 (3): 1081–1088, doi:10.1051/0004-6361:20053901, Bibcode: 2006A&A...445.1081R. 
  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, doi:10.1051/0004-6361:20053222, Bibcode: 2005A&A...442..563M. 

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