Astronomy:63 Ceti
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cetus |
| Right ascension | 02h 11m 35.835s[1] |
| Declination | −01° 49′ 31.537″[1] |
| Apparent magnitude (V) | 5.933±0.010[2] |
| Characteristics | |
| Spectral type | K0III[3] |
| U−B color index | +0.70[4] |
| B−V color index | +0.97[4] |
| Astrometry | |
| Radial velocity (Rv) | 28.02±0.13[1] km/s |
| Proper motion (μ) | RA: −11.171±0.043[1] mas/yr Dec.: −31.922±0.026[1] mas/yr |
| Parallax (π) | 8.6173 ± 0.0396[1] mas |
| Distance | 378 ± 2 ly (116.0 ± 0.5 pc) |
| Absolute magnitude (MV) | 0.57[5] |
| Details | |
| Mass | 1.155±0.182[6] M☉ |
| Radius | 11.051±0.135[6] R☉ |
| Luminosity | 52.579±3.407[6] L☉ |
| Surface gravity (log g) | 2.37±0.09[6] cgs |
| Temperature | 4676±80[6] K |
| Metallicity [Fe/H] | −0.13±0.03[6] dex |
| Rotational velocity (v sin i) | 3.175±0.653[7] km/s |
| Age | 990±50[8] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
63 Ceti is a star in the constellation of Cetus, located just over a degree south of the celestial equator. With an apparent magnitude of about 5.933±0.010[2] the star is barely visible to the naked eye (see Bortle scale) as a dim, orange-hued point of light. Parallax estimates put it at a distance of about 378 light years (116 parsecs) away from the Earth,[1] and it is drifting further away with a radial velocity of 28.02±0.13 km/s.[1]
63 Ceti has a spectral type of K0III,[3] implying an aging K-type giant star. These types of stars are generally reddish-colored stars with spectral types from K to M, with radii that are 10 to 100 times larger than the Sun.[10] 63 Ceti fits this description, with a radius about 11.051±0.135 times larger than the Sun, a mass of about 1.155±0.182 times the Sun, and an effective temperature of 4676±80 K.[6] 63 Ceti is a red clump giant, indicating it is currently at the horizontal branch, a stage in stellar evolution, and is generating energy through core helium fusion. It is close to a billion years old[8] and is radiating 52.579±3.407 times the luminosity of the Sun from its photosphere at an effective temperature of 4676±80 K.[6]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 2.0 2.1 Fabricius, C.; Høg, E.; Makarov, V. V.; Mason, B. D.; Wycoff, G. L.; Urban, S. E. (2002). "VizieR Online Data Catalog: The Tycho-2 catalogue". Astronomy and Astrophysics 384: 180. doi:10.1051/0004-6361:20011822. Bibcode: 2002A&A...384..180F.
- ↑ 3.0 3.1 Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5". Michigan Spectral Survey 5: 0. Bibcode: 1999MSS...C05....0H.
- ↑ 4.0 4.1 Johnson, H. L. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory 4: 99. Bibcode: 1966CoLPL...4...99J.
- ↑ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 Soubiran, C.; Creevey, O. L.; Lagarde, N.; Brouillet, N.; Jofré, P.; Casamiquela, L.; Heiter, U.; Aguilera-Gómez, C. et al. (2024-02-01). "Gaia FGK benchmark stars: Fundamental Teff and log g of the third version". Astronomy and Astrophysics 682: A145. doi:10.1051/0004-6361/202347136. ISSN 0004-6361. Bibcode: 2024A&A...682A.145S.
- ↑ Soto, M. G.; Jones, M. I.; Jenkins, J. S. (March 2021). "SPECIES. II. Stellar parameters of the EXPRESS giant star sample". Astronomy & Astrophysics 647: 24. doi:10.1051/0004-6361/202039357. A157. Bibcode: 2021A&A...647A.157S.
- ↑ 8.0 8.1 Gallenne, A.; Pietrzyński, G.; Graczyk, D.; Nardetto, N.; Mérand, A.; Kervella, P.; Gieren, W.; Villanova, S. et al. (August 2018). "Fundamental properties of red-clump stars from long-baseline H-band interferometry". Astronomy & Astrophysics 616: 12. doi:10.1051/0004-6361/201833341. A68. Bibcode: 2018A&A...616A..68G.
- ↑ "* 63 Cet". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=%2A+63+Cet.
- ↑ David Darling. "Red giant". The Internet Encyclopedia of Science. http://www.daviddarling.info/encyclopedia/R/redgiant.html. Retrieved 21 March 2017.
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