tau Cet e
Description: Tau Ceti e, also called 52 Ceti e, is an exoplanet candidate orbiting Tau Ceti, first detected in 2012 by statistical analyses of the star's variations in radial velocity obtained using HIRES, AAPS and HARPS. Its possible properties were refined in 2017, where it was one of two planets recovered from new data, the other being Tau Ceti f. It would orbit at a distance of 0.552 AU with an orbital period of 168 days and has a minimum mass of 3.93 Earth masses. If Tau Ceti e possesses an Earth-like atmosphere, the surface temperature would be around 68 °C. Based upon the incident flux upon the planet, a study by Güdel et al. (2014) speculated that the planet may lie inside the inner-boundary of the habitable zone and be a Venus-like world.
Physical Properties
Mass (Jupiter mass): Unknown
Radius (Jupiter radius): 0.161 RJ
Density: 3.64 g/cm³
Equilibrium Temperature: Unknown
Orbital Parameters
Orbital Period: 162.87 days
Semi-major Axis: 0.538 AU
Eccentricity: 0.18
Inclination: Unknown
Host Star Properties
Host Star: tau Cet
Spectral Type: G8.5V
Temperature: 5310.0 K
Stellar Mass: 0.78 M☉
Stellar Radius: 0.83 R☉
Discovery Information
Planet Letter: e
Object ID: 3.12041
Host ID: 2.54328
Discovery Date: 2017-10
Discovery Year: 2017
Discovery Method: Radial Velocity
Discovery Locale: Ground
Discovery Facility: Multiple Observatories
Discovery Instrument: Multiple Instruments