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

79 Ceti (also known as HD 16141) is a yellow subgiant star approximately 127 light-years[1] away in the constellation Cetus. It has stopped hydrogen fusion in its core, this implies an age much higher than our 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. arXiv:0708.1752. Bibcode:2007A&A...474..653V. 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. 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. 

External links[edit]

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