79 Ceti

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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
Distance 127 ± 3 ly
(39 ± 1 pc)
Absolute magnitude (MV) 4.00
Details
Mass 1.14[2] M
Radius 1.57 R
Luminosity 2.16 L
Temperature 5,806[2] K
Metallicity [Fe/H] = 0.16[2]
1.45 × Solar
Age 6.0[2] Gyr
Other designations
HD 16141, GJ 9085, HIP 12048, SAO 129992, BD−04° 426
Database references
SIMBAD data

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[edit]

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[edit]

References[edit]

  1. ^ a b c d e f van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752Freely accessible. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ a b c d 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. Bibcode:2010A&A...512L...5S. arXiv:1003.0405Freely accessible. 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. Bibcode:2000ApJ...536L..43M. arXiv:astro-ph/0004326Freely accessible. doi:10.1086/312723. 
  4. ^ Butler, J. T.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. Bibcode:2006ApJ...646..505B. arXiv:astro-ph/0607493Freely accessible. doi:10.1086/504701. 

External links[edit]

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