Phi3 Ceti

Phi3 Ceti is a solitary,[11] orange-hued star in the equatorial constellation of Cetus. It is faintly visible to the naked eye with an apparent visual magnitude of 5.31.[2] Based upon an annual parallax shift of 5.92 mas as seen from Earth,[1] it is located roughly 550 light years from the Sun, give or take 30 light years.

For other stars with this Bayer designation, see φ Ceti.
Phi3 Ceti
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cetus
Right ascension 00h 56m 01.48929s[1]
Declination −11° 15′ 59.4962″[1]
Apparent magnitude (V) 5.31[2]
Characteristics
Spectral type K5 III[3]
B−V color index +1.52[2]
Astrometry
Radial velocity (Rv)−26.0±0.7[4] km/s
Proper motion (μ) RA: −28.37[1] mas/yr
Dec.: −8.22[1] mas/yr
Parallax (π)5.92 ± 0.27[1] mas
Distance550 ± 30 ly
(169 ± 8 pc)
Absolute magnitude (MV)−0.78[5]
Details
Mass1.4[6] M☉
Radius44[7] R☉
Luminosity429[8] L☉
Surface gravity (log g)1.67[9] cgs
Temperature3,940[9] K
Metallicity [Fe/H]−0.31[9] dex
Rotational velocity (v sin i)1.0[6] km/s
Other designations
φ3 Cet, 22 Cet, BD−12° 162, HD 5437, HIP 4371, HR 267, SAO 147519[10]
Database references
SIMBADdata

This is an evolved K-type giant star with a stellar classification of K5 III.[3] The measured angular diameter of Phi3 Ceti is 2.42±0.13 mas.[12] At the estimated distance of the star, this yields a physical size of about 44 times the Sun's radius.[7] It has about 1.4[6] times the mass of the Sun and radiates 429[8] times the solar luminosity from its photosphere at an effective temperature of 3,940 K.[9]

References
  1. van Leeuwen, F. (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.
  2. Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J.
  3. Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey, Ann Arbor, Michigan: Department of Astronomy, University of Michigan, 5, Bibcode:1999MSS...C05....0H.
  4. de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, A61.
  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.
  6. Melo, C. H. F.; et al. (August 2005), "On the nature of lithium-rich giant stars. Constraints from beryllium abundances", Astronomy and Astrophysics, 439 (1): 227–235, arXiv:astro-ph/0504133, Bibcode:2005A&A...439..227M, doi:10.1051/0004-6361:20041805.
  7. Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, 1 (3rd ed.), Birkhäuser, ISBN 3-540-29692-1 The radius (R*) is given by:
  8. McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x.
  9. Soubiran, C.; et al. (June 2010), "The PASTEL catalogue of stellar parameters", Astronomy and Astrophysics, 515: A111, arXiv:1004.1069, Bibcode:2010A&A...515A.111S, doi:10.1051/0004-6361/201014247.
  10. "phi03 Cet". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-04-22.
  11. 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.
  12. Richichi, A.; et al. (February 2005), "CHARM2: An updated Catalog of High Angular Resolution Measurements", Astronomy and Astrophysics, 431 (2): 773–777, Bibcode:2005A&A...431..773R, doi:10.1051/0004-6361:20042039.
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