Tau Ceti e
|Extrasolar planet||List of extrasolar planets|
|Right ascension||(α)||01h 44m 05s|
|Declination||(δ)||−15° 56′ 15″|
|Distance||11.905 ± 0.007 ly
(3.65 ± 0.002 pc)
|Mass||(m)||0.783 ± 0.012 M☉|
|Radius||(r)||0.793 ± 0.004 R☉|
|Temperature||(T)||5344 ± 50 K|
|Metallicity||[Fe/H]||−0.55 ± 0.05|
|Semimajor axis||(a)||0.552 ± 0.02 AU|
|Eccentricity||(e)||0.05 ± 0.02|
|Orbital period||(P)||168.12 ± 2.0 d
|Semi-amplitude||(K)||0.58  m/s|
|Minimum mass||(m sin i)||4.3 M⊕|
|Discovery date||19 December 2012|
|Discoverer(s)||Tuomi et al.|
|Discovery method||Radial velocity|
|Open Exoplanet Catalogue||data|
Tau Ceti e is an unconfirmed planet that may be orbiting the nearby Sun-like star Tau Ceti at a distance of 11.905 light years from the Sun. It is the fourth planet of the system in distance to its star.
As with the other four planets of Tau Ceti, it was detected by realizing statistical analyses of the data of the star's variations in radial velocity that were obtained using HIRES, AAPS, and HARPS.
Due to the detection method used, few properties of the planet are known other than its orbit and mass.
It orbits Tau Ceti at a distance of 0.552 AU (between the orbits of Venus and Mercury in the Solar System) with an orbital period of 168 days and has a minimum mass of 4.3 Earth masses, which means it is Earth sized because it is under 5 Earth Masses which is the minimum mass of a Super-Earth.
Tau Ceti e orbits within Tau Ceti's habitable zone.
- Tuomi, M. et al. (2013). "Signals embedded in the radial velocity noise: Periodic variations in the tau Ceti velocities". Astronomy & Astrophysics 551 (preprint): A79. arXiv:1212.4277. Bibcode:2012yCat..35519079T. doi:10.1051/0004-6361/201220509.
- Abel Mendez Torres (December 19, 2012). "Two Nearby Habitable Worlds?" (Press release). Planetary Habitability Laboratory @ UPR Arecibo. Retrieved 2013-12-28.
- Earth sized = 0.5 — 5 M🜨 http://phl.upr.edu/projects/habitable-exoplanets-catalog