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75 Ceti

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75 Ceti
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ceti
Right ascension 02h 32m 09.0s
Declination −01° 02′ 06″
Apparent magnitude (V) +5.36
Characteristics
Spectral type G3 III
Astrometry
Parallax (π)12.27 ± 1.13 mas
Distancely
(81.5 ± 7.51[1] pc)
Details
Mass2.49 (2.22–2.51) M
Radius10.5 (9.5–11.5) R
Luminosity53.7 L
Surface gravity (log g)2.63±0.05 cgs
Temperature4846±18 K
Metallicity+0.00±0.04
Age? years
Other designations
HD 15779, HIP 11791
Database references
SIMBADdata
Exoplanet Archivedata

75 Ceti is a G-type giant with one known planet, 75 Ceti b. This planet seems to be a typical gas giant, except that it takes in much more insolation than does Jupiter (and Earth).[2]


The 75 Ceti planetary system[3]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b MJ 2.1 691.9 ± 3.6 0.117 ± 0.048

There may be additional periodic factors in the data, corresponding to m sin i of around 0.4 MJ and 1 MJ, at distances of ∼ 0.9 AU and ∼4 AU. If these are confirmed, they are more irradiated than Earth as well.

References

  1. ^ "75 Ceti b".
  2. ^ Square root of luminosity means that an Earth like planet would have to be >7 AU from the star.
  3. ^ "Substellar Companions to Seven Evolved Intermediate-Mass Stars". PASJ. 2012. arXiv:1207.3141. {{cite journal}}: Unknown parameter |authors= ignored (help)