Kepler-191 is a Sun-like G-type star (about 0.84 solar masses, 5,215 K, 0.80 solar radii), 594 light-years from Earth. Kepler-191 b is a planet with 1.3 Earth radii, with an orbital period of 9.9 days, at 0.087 AU from its star, discovered in 2014 via transit. Kepler-191 c is a planet with 1.9 Earth radii, with an orbital period of 17.7 days, at 0.128 AU from its star, discovered in 2014 via transit. Kepler-191 d is a planet with 2.3 Earth radii, with an orbital period of 5.9 days, discovered in 2016 via transit.