47 UMa b
Description: 47 Ursae Majoris b, formally named Taphao Thong, is a gas planet and an extrasolar planet approximately 46 light-years from Earth in the constellation of Ursa Major. The planet was discovered located in a long-period orbit around the star 47 Ursae Majoris in January 1996 and as of 2011 it is the innermost of three known planets in its planetary system. It has a mass at least 2.53 times that of Jupiter.
Physical Properties
Mass (Jupiter mass): Unknown
Radius (Jupiter radius): 1.18 RJ
Density: 1.92 g/cm³
Equilibrium Temperature: Unknown
Orbital Parameters
Orbital Period: 1078.0 days
Semi-major Axis: 2.1 AU
Eccentricity: 0.032
Inclination: Unknown
Host Star Properties
Host Star: 47 UMa
Spectral Type: G0 V
Temperature: 5872.0 K
Stellar Mass: 1.06 M☉
Stellar Radius: 1.21 R☉
Discovery Information
Planet Letter: b
Object ID: 3.10916
Host ID: 2.56295
Discovery Date: 1996-06
Discovery Year: 1996
Discovery Method: Radial Velocity
Discovery Locale: Ground
Discovery Facility: Lick Observatory
Discovery Instrument: Hamilton Echelle Spectrograph