Kepler-403 is a Sun-like F-type star (about 1.25 solar masses, 6,209 K, 1.45 solar radii), 840 light-years from Earth. Kepler-403 b is a planet with 1.3 Earth radii, with an orbital period of 7.0 days, at 0.076 AU from its star, discovered in 2014 via transit. Kepler-403 c is a planet with 1.8 Earth radii, with an orbital period of 54.3 days, at 0.297 AU from its star, discovered in 2014 via transit. Kepler-403 d is a planet with 1.4 Earth radii, with an orbital period of 13.6 days, discovered in 2016 via transit.