Teegarden's Star b
Description: Teegarden's Star b is an exoplanet found orbiting within the habitable zone of Teegarden's Star, an M-type red dwarf 12.5 light years away from the Solar System. It had the highest Earth Similarity Index (ESI) of any exoplanet, but in February 2024 a new study updated the parameters of the planet, thus reducing its ESI to 0.90, making it no longer the planet with the hightest ESI. Along with Teegarden's Star c, it is among the closest known potentially habitable exoplanets.
Physical Properties
Mass (Jupiter mass): Unknown
Radius (Jupiter radius): 0.094 RJ
Density: 5.51 g/cm³
Equilibrium Temperature: 277.0 K
Orbital Parameters
Orbital Period: 4.90634 days
Semi-major Axis: 0.0259 AU
Eccentricity: 0.03
Inclination: Unknown
Host Star Properties
Host Star: Teegarden's Star
Spectral Type: M7.0 V
Temperature: 3034.0 K
Stellar Mass: 0.1 M☉
Stellar Radius: 0.12 R☉
Discovery Information
Planet Letter: b
Object ID: 3.12387
Host ID: 2.103993
Discovery Date: 2019-07
Discovery Year: 2019
Discovery Method: Radial Velocity
Discovery Locale: Ground
Discovery Facility: Calar Alto Observatory
Discovery Instrument: CARMENES