79 Ceti

Coordinates: Sky map 02h 35m 19.9283s, −03° 33′ 38.167″
Source: Wikipedia, the free encyclopedia.
79 Ceti
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cetus
Right ascension 02h 35m 19.9293s[1]
Declination −03° 33′ 38.1707″[1]
Apparent magnitude (V) +6.83[2]
Characteristics
Spectral type G2V+M[3][4] or G8IV[5]
B−V color index 0.670±0.004[2]
Variable type none
Distance
123.4 ± 0.3 ly
(37.83 ± 0.08 pc)
Absolute magnitude (MV)+3.88[2]
Details
Gyr
79 Ceti B
Mass0.286[4] M☉
HIP 12048, SAO 129992, WDS J02353-0334A, 2MASS J02351994-0333376[9]
Database references
SIMBADdata

79 Ceti, also known as HD 16141, is a

apparent visual magnitude of +6.83,[2] which puts it below the normal limit for visibility with the average naked eye. The star is drifting closer to the Earth with a heliocentric radial velocity of −51 km/s.[2]

Harlan (1974) assigned this star a

luminosity of the Sun from its photosphere at an effective temperature of 5,806 K.[6] The discrepancy was later found to be due to an additional red dwarf star in the system at a projected separation 220 AUs.[4]

Planetary system

On March 29, 2000, a planet orbiting primary star was announced, it was discovered using the

radial velocity method.[10] This object has a minimum 0.26 times the mass of Jupiter and is orbiting its host star every 75.5 days.[11]

The 79 Ceti planetary system[12]
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. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  2. ^
    S2CID 119257644
    .
  3. ^
    doi:10.1086/111597
    .
  4. ^
    S2CID 209444271
  5. ^
    Bibcode:1999MSS...C05....0H
    .
  6. ^
    S2CID 18173201
    .
  7. ^
    S2CID 119219062
    . 136.
  8. ^
    S2CID 118646949
    .
  9. ^ "79 Cet". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 19 August 2017.
  10. ^ "Keck astronomers discover planets smaller than saturn" (Press release). Kamuela, Hawaii: W. M. Keck Observatory. March 29, 2000. Retrieved August 13, 2019.
  11. S2CID 119530785
    .
  12. S2CID 119067572
    .

External links


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