81 Ceti b

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81 Ceti b
Extrasolar planet List of extrasolar planets
Parent star
Star 81 Ceti
Constellation Cetus
Right ascension (α) 02h 37m 41.80s[1]
Declination (δ) –03° 23′ 46.2″[1]
Apparent magnitude (mV) 5.65
Distance 300 ± 10[1] ly
(93 ± 4[1] pc)
Spectral type G5III
Orbital elements
Semimajor axis (a) 2.5 AU
(370 Gm)
Periastron (q) 2.0 AU
(300 Gm)
Apastron (Q) 3.0 AU
(440 Gm)
Eccentricity (e) 0.206 ± 0.029
Orbital period (P) 952.7 ± 8.8 d
(2.608 y)
Argument of
periastron
(ω) 175 ± 69°
Time of periastron (T0) 2486 ± 26 JD
Physical characteristics
Minimum mass (m sin i) 5.3 MJ
Discovery information
Discovery date July 3, 2008
Discoverer(s) Sato et al.
Discovery method Doppler Spectroscopy
Discovery status Published
Other designations
HD 16400 b
Database references
Extrasolar Planets
Encyclopaedia
data
SIMBAD data

81 Ceti b (abbreviated 81 Cet b) is an extrasolar planet approximately 300 light years away in the constellation of Cetus. It orbits the G-type giant star 81 Ceti at an average distance of 2.5 AU, taking about 2.6 years to revolve with 20.6% eccentricity.[2] This planet was discovered on July 3, 2008 by Sato et al., who used Doppler Spectroscopy and found the wobbling of the star caused by the planet’s gravity during its revolution.

See also[edit]

References[edit]

  1. ^ a b c d 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. ^ Sato, Bun'ei et al. (2008). "Planetary Companions to Evolved Intermediate-Mass Stars: 14 Andromedae, 81 Ceti, 6 Lyncis, and HD167042". Publications of the Astronomical Society of Japan 60 (6): 1317–1326. arXiv:0807.0268. Bibcode:2008PASJ...60.1317S. doi:10.1093/pasj/60.6.1317. 

External links[edit]

Coordinates: Sky map 02h 37m 41.8003s, −03° 23′ 46.229″