75 Ceti
Appearance
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 |
Distance | ? ly (81.5 ± 7.51[1] pc) |
Details | |
Mass | 2.49 (2.22–2.51) M☉ |
Radius | 10.5 (9.5–11.5) R☉ |
Luminosity | 53.7 L☉ |
Surface gravity (log g) | 2.63±0.05 cgs |
Temperature | 4846±18 K |
Metallicity | +0.00±0.04 |
Age | ? years |
Other designations | |
HD 15779, HIP 11791 | |
Database references | |
SIMBAD | data |
Exoplanet Archive | data |
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]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 3 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
- ^ "75 Ceti b".
- ^ Square root of luminosity means that an Earth like planet would have to be >7 AU from the star.
- ^ "Substellar Companions to Seven Evolved Intermediate-Mass Stars". PASJ. 2012. arXiv:1207.3141.
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