Proxima Cen b
Description: Proxima Centauri b is an exoplanet orbiting within the habitable zone of the red dwarf star Proxima Centauri in the constellation Centaurus. It can also be referred to as Proxima b, or Alpha Centauri Cb. The host star is the closest star to the Sun, at a distance of about 4.2 light-years from Earth, and is part of the larger triple star system Alpha Centauri. Proxima b and Proxima d, along with the currently disputed Proxima c, are the closest known exoplanets to the Solar System.
Physical Properties
Mass (Jupiter mass): Unknown
Radius (Jupiter radius): 0.092 RJ
Density: 5.38 g/cm³
Equilibrium Temperature: 234.0 K
Orbital Parameters
Orbital Period: 11.1868 days
Semi-major Axis: 0.04856 AU
Eccentricity: 0.02
Inclination: Unknown
Host Star Properties
Host Star: Proxima Cen
Spectral Type: M5.5 V
Temperature: 2900.0 K
Stellar Mass: 0.12 M☉
Stellar Radius: 0.14 R☉
Discovery Information
Planet Letter: b
Object ID: 3.11922
Host ID: 2.57278
Discovery Date: 2016-08
Discovery Year: 2016
Discovery Method: Radial Velocity
Discovery Locale: Ground
Discovery Facility: European Southern Observatory
Discovery Instrument: Multiple Instruments