K2-287 b: An Eccentric Warm Saturn Transiting a G-dwarf

Abstract

We report the discovery of K2-287b, a Saturn mass planet orbiting a G-dwarf with a period of P  ≈ 15 days. First uncovered as a candidate using K 2 campaign 15 data, follow-up photometry and spectroscopy were used to determine a mass , radius , period days, and eccentricity . The host star is a metal-rich V  = 11.410 ± 0.129 mag G-dwarf for which we estimate a mass , radius , metallicity [Fe/H] = 0.20 ±0.05, and K. This warm eccentric planet with a time-averaged equilibrium temperature of K adds to the small sample of giant planets orbiting nearby stars whose structure is not expected to be affected by stellar irradiation. Follow-up studies on the K2-287 system could help constrain theories of planet migration in close-in orbits.