Astrophysics and Astronomy Commons^™

A Sub-Saturn Mass Planet Orbiting Hd 3651, Debra A. Fischer, R. Paul Butler, Geoffrey W. Marcy, Steve Vogt, Gregory W. Henry

Information Systems and Engineering Management Research Publications

We report precise Doppler velocities of HD 3651 obtained at Lick and Keck Observatories. The velocities reveal evidence of a planetary companion with an orbital period of 62.23 ± 0.03 days, an eccentricity of 0.63 ± 0.04, and a velocity semiamplitude of 15.9 ± 1.7 m s^-1. With an assumed mass of 0.79 M_☉ for this K0 V star, we derive M sin i = 0.20M_J and a semimajor axis of 0.284 AU. The star is chromospherically inactive, with log R = -5.01, and 10 years of observations at Fairborn Observatory show it to be …