63 Ceti

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63 Ceti
Observation data
Epoch J2000        Equinox J2000
Constellation Cetus
Right ascension 02h 11m 35.83534s [1]
Declination −01° 49′ 31.5355″ [1]
Apparent magnitude  (V)+5.93 [2]
Characteristics
Spectral type K0III [3]
U−B color index +0.70 [2]
B−V color index +0.97 [2]
Astrometry
Radial velocity (Rv)27.69±0.05 [4] km/s
Proper motion (μ)RA: −11.526 [1] mas/yr
Dec.: −32.007 [1] mas/yr
Parallax (π)8.4943±0.0610  mas [1]
Distance 384 ± 3  ly
(117.7 ± 0.8  pc)
Absolute magnitude  (MV)0.57 [5]
Details [4]
Mass 1.85  M☉
Radius 11.08+0.33
−0.54 [1]   R☉
Luminosity 63.7±0.6  L☉
Surface gravity (log g)2.59  cgs
Temperature 4940  K
Metallicity [Fe/H]−0.17 ± 0.06  dex
Rotational velocity (v sin i)1.27 km/s
Age 990±50 [6]   Myr
Other designations
63  Cet, BD −02°375, HD  13468, HIP  10234, HR  639, SAO  129739 [7]
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 5.9, [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 390 light years (129 parsecs) away from the Earth, [1] and it is drifting further away with a radial velocity of 28 km/s. [4]

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. [8] 63 Ceti fits this description, with a radius about 11 times larger than the Sun, a mass of about 1.85 times the Sun, and an effective temperature of 4940 K. [4] 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 [6] and is radiating 64 times the luminosity of the Sun from its photosphere at an effective temperature of 4,940 K. [4]

References

  1. 1 2 3 4 5 6 7 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics . 616. A1. arXiv: 1804.09365 . Bibcode: 2018A&A...616A...1G . doi: 10.1051/0004-6361/201833051 . Gaia DR2 record for this source at VizieR.
  2. 1 2 3 4 Johnson, H. L. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99. Bibcode:1966CoLPL...4...99J.
  3. 1 2 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. 1 2 3 4 5 Jones, M. I.; Jenkins, J. S.; Rojo, P.; Melo, C. H. F. (2011). "Study of the impact of the post-MS evolution of the host star on the orbits of close-in planets". Astronomy & Astrophysics. 536: A71. arXiv: 1110.6459 . Bibcode:2011A&A...536A..71J. doi:10.1051/0004-6361/201117887. S2CID   55769003.
  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, S2CID   119257644.
  6. 1 2 Gallenne, A.; et al. (August 2018). "Fundamental properties of red-clump stars from long-baseline H-band interferometry". Astronomy & Astrophysics. 616: 12. arXiv: 1806.09572 . Bibcode:2018A&A...616A..68G. doi:10.1051/0004-6361/201833341. S2CID   119331707. A68.
  7. ↑ "* 63 Cet". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 21 March 2017.
  8. ↑ David Darling. "Red giant". The Internet Encyclopedia of Science. Retrieved 21 March 2017.
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