HD 81688 b
Description: 41 Lyncis b, also designated HD 81688 b and named Arkas, is an extrasolar planet approximately 280 light-years from Earth in the constellation of Ursa Major.
Physical Properties
Mass (Jupiter mass): Unknown
Radius (Jupiter radius): 1.2 RJ
Density: 1.17 g/cm³
Equilibrium Temperature: Unknown
Orbital Parameters
Orbital Period: 183.93 days
Semi-major Axis: 0.648 AU
Eccentricity: 0.04
Inclination: Unknown
Host Star Properties
Host Star: HD 81688
Spectral Type: K0 III-IV
Temperature: 4797.0 K
Stellar Mass: 1.07 M☉
Stellar Radius: 11.13 R☉
Discovery Information
Planet Letter: b
Object ID: 3.11345
Host ID: 2.55987
Discovery Date: 2008-06
Discovery Year: 2007
Discovery Method: Radial Velocity
Discovery Locale: Ground
Discovery Facility: Okayama Astrophysical Observatory
Discovery Instrument: HIDES Echelle Spectrograph