Kepler-109 is a Sun-like G-type star (about 1.09 solar masses, 5,950 K, 1.39 solar radii), 475 light-years from Earth. Kepler-109 b is a 4.9-Earth-mass planet, with an orbital period of 6.5 days, at 0.070 AU from its star, and an equilibrium temperature near 1,276 K, on an eccentric orbit (e ≈ 0.11), discovered in 2014 via transit. Kepler-109 c is a 8.2-Earth-mass planet, with an orbital period of 21.2 days, at 0.155 AU from its star, and an equilibrium temperature near 859 K, on an eccentric orbit (e ≈ 0.10), discovered in 2014 via transit.