91 Aqr b
Description: 91 Aquarii b, also known as HD 219449 b, is an extrasolar planet orbiting in the 91 Aquarii system approximately 148 light-years away in the constellation of Aquarius. It orbits at the average distance of 105 Gm from its star, which is slightly closer than Venus is to the sun. The planet takes half an Earth year to orbit around the star in a very circular orbit with eccentricity less than 0.053.
Physical Properties
Mass (Jupiter mass): Unknown
Radius (Jupiter radius): 1.17 RJ
Density: 2.49 g/cm³
Equilibrium Temperature: Unknown
Orbital Parameters
Orbital Period: 181.4 days
Semi-major Axis: 0.7 AU
Eccentricity: 0.027
Inclination: Unknown
Host Star Properties
Host Star: 91 Aqr
Spectral Type: K0 III
Temperature: 4665.0 K
Stellar Mass: 1.4 M☉
Stellar Radius: 11.0 R☉
Discovery Information
Planet Letter: b
Object ID: 3.11237
Host ID: 2.61504
Discovery Date: 2013-07
Discovery Year: 2013
Discovery Method: Radial Velocity
Discovery Locale: Ground
Discovery Facility: Lick Observatory
Discovery Instrument: Hamilton Echelle Spectrograph