Tau Ceti f
| Discovery | |
|---|---|
| Discovery date | December 19, 2012 |
| Doppler spectroscopy | |
| Orbital characteristics | |
| 1.334 au | |
| Eccentricity | 0.16 |
| 1.7 y | |
| Star | Tau Ceti |
| Physical characteristics | |
| ~1.81 R🜨 (estimate) | |
| Mass | ≥3.93 M🜨 |
| ≥1.201 g ≥11.78 m/s2 | |
Tau Ceti f is a candidate super-Earth or mini-Neptune orbiting Tau Ceti that was discovered in 2012 by statistical analyses of the star's variations in radial velocity, based on data obtained using HIRES, AAPS, and HARPS. It is of interest because its orbit places it in Tau Ceti's extended habitable zone, but a 2015 study implies that there may not be a detectable biosignature because it has only been in the temperate zone for less than one billion years. In 2017, it was again recovered from radial-velocity data, along with Tau Ceti e. Despite this, it remains unconfirmed and disputed.