XO-2 S is a Sun-like G-type star (about 0.98 solar masses, 5,325 K, 1.02 solar radii), 151 light-years from Earth. XO-2 S b is a 0.26-Jupiter-mass companion, with an orbital period of 18.2 days, at 0.135 AU from its star, on an eccentric orbit (e ≈ 0.15), discovered in 2014 via radial velocity. XO-2 S c is a 1.38-Jupiter-mass companion, with an orbital period of 120 days, at 0.474 AU from its star, on an eccentric orbit (e ≈ 0.15), discovered in 2014 via radial velocity.