K2-243 is a Sun-like F-type star (about 1.29 solar masses, 6,570 K, 1.39 solar radii), 267 light-years from Earth. K2-243 b is a planet with 2.2 Earth radii, with an orbital period of 11.5 days, at 0.109 AU from its star, and an equilibrium temperature near 1,035 K, discovered in 2018 via transit. K2-243 c is a planet with 2.0 Earth radii, with an orbital period of 24.9 days, at 0.182 AU from its star, and an equilibrium temperature near 801 K, discovered in 2018 via transit.