81 Ceti b
| Exoplanet | List of exoplanets | |
|---|---|---|
| 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 | ||
| Semi-major axis | (a) | 2.5 AU |
| Eccentricity | (e) | 0.206 ± 0.029 |
| Orbital period | (P) | 952.7 ± 8.8 d |
| 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 2, 2008 | |
| Discoverer(s) | Sato et al. | |
| Discovery method | Doppler Spectroscopy | |
| Discovery status | Published[2] | |
| Other designations | ||
HD 16400 b | ||
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | 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 a eccentricity of 20.6.[2]
Discovery
The preprint announcing this planet was submitted to the arXiv electronic repository on July 2, 2008 by Bun'ei Sato and collaborators, who discovered it using the Doppler Spectroscopy method, during the Okayama Planet Search radial velocity survey of G and K giants at Okayama Astrophysical Observatory.[2]
See also
References
- 1 2 3 4 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
- 1 2 3 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
- Jean Schneider (2011). "Notes for Planet 81 Cet b". Extrasolar Planets Encyclopaedia. Retrieved 12 October 2011.
- "81 Ceti". Exoplanets. Retrieved 2008-08-06.
Coordinates: 
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