Kepler-251 is a Sun-like G-type star (about 0.89 solar masses, 5,526 K, 0.89 solar radii), 925 light-years from Earth. Kepler-251 b is a planet with 1.3 Earth radii, with an orbital period of 4.8 days, at 0.053 AU from its star, discovered in 2014 via transit. Kepler-251 c is a planet with 2.8 Earth radii, with an orbital period of 16.5 days, at 0.122 AU from its star, discovered in 2014 via transit. Kepler-251 d is a planet with 2.8 Earth radii, with an orbital period of 30.1 days, at 0.182 AU from its star, discovered in 2014 via transit.