6 Ceti

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6 Ceti
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cetus
Right ascension  00h 11m 15.85761s[1]
Declination −15° 28′ 04.7258″[1]
Apparent magnitude (V) 4.89[2]
Spectral type F8 V Fe−0.8 CH−0.5[3]
B−V color index 0.487±0.012[2]
Radial velocity (Rv)+16.70±0.08[4] km/s
Proper motion (μ) RA: −83.38[1] mas/yr
Dec.: −270.17[1] mas/yr
Parallax (π)53.34 ± 0.64[1] mas
Distance61.1 ± 0.7 ly
(18.7 ± 0.2 pc)
Absolute magnitude (MV)3.53[2]
Luminosity3.34[2] L
Surface gravity (log g)4.17±0.12 cgs
Temperature6,289±81 K
Metallicity [Fe/H]−0.33±0.06 dex
Rotational velocity (v sin i)4.88[6] km/s
Other designations
6 Cet, BD−16° 17, GJ 10, HD 693, HIP 910, HR 33, SAO 147133[7]
Database references

6 Ceti is a single[8] star in the equatorial constellation of Cetus. It is visible to the naked eye with an apparent magnitude of 4.89.[2] The annual parallax shift as measured from Earth's orbit is 53.34 mas, which yields a distance estimate of 61.1 light years. The star is moving further from the Sun with a constant radial velocity of +16.70 km/s.[4] It is one of the IAU's standard velocity stars.[9]

Gray et al. (2006) assigned this star a stellar classification of F8 V Fe−0.8 CH−0.5,[3] indicating it is an F-type main-sequence star with an underabundance of iron and the CH molecule in its stellar atmosphere. It is about 4.2 billion years old with 1.12[5] times the mass of the Sun and is spinning with a projected rotational velocity of 4.88 km/s.[6] The star is radiating 3.34[2] times the Sun's luminosity from its photosphere at an effective temperature of about 6,289 K.[5]


  1. ^ a b c d e 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. ^ a b c d e f 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.
  3. ^ a b Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2006), "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample", The Astronomical Journal, 132: 161, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637.
  4. ^ a b Maldonado, J.; et al. (October 2010), "A spectroscopy study of nearby late-type stars, possible members of stellar kinematic groups", Astronomy and Astrophysics, 521: A12, arXiv:1007.1132, Bibcode:2010A&A...521A..12M, doi:10.1051/0004-6361/201014948.
  5. ^ a b c Bensby, T.; et al. (2014), "Exploring the Milky Way stellar disk. A detailed elemental abundance study of 714 F and G dwarf stars in the solar neighbourhood", Astronomy & Astrophysics, 562 (A71): 28, arXiv:1309.2631, Bibcode:2014A&A...562A..71B, doi:10.1051/0004-6361/201322631.
  6. ^ a b Martínez-Arnáiz, R.; et al. (September 2010), "Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter" (PDF), Astronomy and Astrophysics, 520: A79, arXiv:1002.4391, Bibcode:2010A&A...520A..79M, doi:10.1051/0004-6361/200913725.
  7. ^ "6 Cet". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-02-16.
  8. ^ 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.
  9. ^ Scarfe, C. D.; et al. (1990), "Coude Radial Velocities of Standard Stars", Publications of the Dominion Astrophysical Observatory, 18: 21, Bibcode:1990PDAO...18...21S.