being accreted by the star, which may account for the large surface metallicity. Planetary system The first planet was discovered in 2001 from the Lick and Keck observatories using precision measurements of the star's radial velocity variations. The periodicity in this variation allowed astronomers to extract information about the planet's orbit and minimum mass. A second planet was discovered by the same team two years later. Both planets are greater in mass than Jupiter. The system is dynamically unstable. "Either this system is being observed during a relatively rare state, or additional planets are affecting the observed radial velocities and/or the system’s secular eccentricity evolution." See also List of extrasolar planets References External links Extrasolar Planet Interactions by Rory Barnes & Richard Greenberg, Lunar and Planetary Lab, University of Arizona Local Sky Map 009683 Aries (constellation) 012661 G-type main-sequence stars Planetary systems with two confirmed planets Durchmusterung objects