6 Ceti
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]
| 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] |
| Characteristics | |
| Spectral type | F8 V Fe−0.8 CH−0.5[3] |
| B−V color index | 0.487±0.012[2] |
| Astrometry | |
| 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 mas[1] |
| Distance | 61.1 ± 0.7 ly (18.7 ± 0.2 pc) |
| Absolute magnitude (MV) | 3.53[2] |
| Details[5] | |
| Mass | 1.12+0.08 −0.04 M☉ |
| Luminosity | 3.34[2] L☉ |
| Surface gravity (log g) | 4.17±0.12 cgs |
| Temperature | 6,289±81 K |
| Metallicity [Fe/H] | −0.33±0.06 dex |
| Rotational velocity (v sin i) | 4.88[6] km/s |
| Age | 4.2+0.8 −0.9 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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]
References edit
- ^ 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, S2CID 18759600.
- ^ 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, S2CID 119257644.
- ^ 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 (1): 161–170, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637, S2CID 119476992.
- ^ 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, S2CID 119209183.
- ^ 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, S2CID 118786105.
- ^ a b Martínez-Arnáiz, R.; et al. (September 2010), (PDF), Astronomy and Astrophysics, 520: A79, arXiv:1002.4391, Bibcode:2010A&A...520A..79M, doi:10.1051/0004-6361/200913725, S2CID 43455849, archived from the original (PDF) on 2017-09-22, retrieved 2018-11-04.
- ^ "6 Cet". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-02-16.
- ^ 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, S2CID 14878976.
- ^ Scarfe, C. D.; et al. (1990), "Coude Radial Velocities of Standard Stars", Publications of the Dominion Astrophysical Observatory, 18: 21, Bibcode:1990PDAO...18...21S.