HD 40307 g
Description: HD 40307 g is an exoplanet candidate suspected to be orbiting in the habitable zone of HD 40307. It is located 42 light-years away in the direction of the southern constellation Pictor. The planet was discovered by the radial velocity method, using the European Southern Observatory's HARPS apparatus by a team of astronomers led by Mikko Tuomi at the University of Hertfordshire and Guillem Anglada-Escude of the University of Göttingen, Germany.
Physical Properties
Mass (Jupiter mass): Unknown
Radius (Jupiter radius): 0.229 RJ
Density: 2.33 g/cm³
Equilibrium Temperature: 255.0 K
Orbital Parameters
Orbital Period: 197.8 days
Semi-major Axis: 0.6 AU
Eccentricity: 0.29
Inclination: Unknown
Host Star Properties
Host Star: HD 40307
Spectral Type: K2.5 V
Temperature: 4956.0 K
Stellar Mass: 0.77 M☉
Stellar Radius: 0.72 R☉
Discovery Information
Planet Letter: g
Object ID: 3.11561
Host ID: 2.55267
Discovery Date: 2013-01
Discovery Year: 2013
Discovery Method: Radial Velocity
Discovery Locale: Ground
Discovery Facility: La Silla Observatory
Discovery Instrument: HARPS Spectrograph