79 Ceti

79 Ceti
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cetus
Right ascension 02h 35m 19.93s[1]
Declination −03° 33′ 38.2″[1]
Apparent magnitude (V) +6.78
Characteristics
Spectral type G5IV
Variable type none
Astrometry
Radial velocity (Rv)-53 km/s
Proper motion (μ) RA: -157.31 ± 0.49[1] mas/yr
Dec.: -438.79 ± 0.43[1] mas/yr
Parallax (π)25.67 ± 0.66[1] mas
Distance127 ± 3 ly
(39 ± 1 pc)
Absolute magnitude (MV)4.00
Details
Mass1.14[2] M☉
Radius1.57 R☉
Luminosity2.16 L☉
Temperature5,806[2] K
Metallicity[Fe/H] = 0.16[2]
1.45 × Solar
Age6.0[2] Gyr
Other designations
HD 16141, GJ 9085, HIP 12048, SAO 129992, BD−04° 426
Database references
SIMBADdata

79 Ceti (also known as HD 16141) is a yellow subgiant star approximately 127 light-years[1] away in the constellation Cetus. Its core no longer fuses hydrogen, meaning its age is greater than the Sun's 4.5 billion years. Eventually the outer layers of the star will expand and cool and the star will become a red giant. Currently 79 Ceti has a luminosity twice that of the Sun.

Planetary system

In 2000, a planet of the star was discovered.[3]

The 79 Ceti planetary system[4]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b ≥0.260 ± 0.028 MJ 0.363 ± 0.021 75.523 ± 0.055 0.252 ± 0.052 — —

See also

References

  1. 1 2 3 4 5 6 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. Vizier catalog entry
  2. 1 2 3 4 Sousa, S. G.; Fernandes, J.; Israelian, G.; Santos, N. C. (March 2010). "Higher depletion of lithium in planet host stars: no age and mass effect". Astronomy and Astrophysics. 512: L5. arXiv:1003.0405. Bibcode:2010A&A...512L...5S. doi:10.1051/0004-6361/201014125.
  3. ↑ Marcy, Geoffrey W.; et al. (2000). "Sub-Saturn Planetary Candidates of HD 16141 and HD 46375". The Astrophysical Journal Letters. 536 (1): L43–L46. arXiv:astro-ph/0004326. Bibcode:2000ApJ...536L..43M. doi:10.1086/312723.
  4. ↑ Butler, J. T.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.

Coordinates: 02h 35m 19.9283s, −03° 33′ 38.167″


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