Kepler-339 is a Sun-like G-type star (about 0.87 solar masses, 5,631 K, 0.80 solar radii), 617 light-years from Earth. Kepler-339 b is a planet with 1.4 Earth radii, with an orbital period of 5.0 days, at 0.055 AU from its star, discovered in 2014 via transit. Kepler-339 c is a planet with 1.1 Earth radii, with an orbital period of 7.0 days, at 0.069 AU from its star, discovered in 2014 via transit. Kepler-339 d is a planet with 1.2 Earth radii, with an orbital period of 10.6 days, at 0.091 AU from its star, discovered in 2014 via transit.