HD 128311 is an orange K-type dwarf (about 0.83 solar masses, 4,965 K, 0.76 solar radii), 16.3 light-years from Earth. HD 128311 b is a 1.77-Jupiter-mass companion, with an orbital period of 1.24 years, at 1.084 AU from its star, on an eccentric orbit (e ≈ 0.30), discovered in 2002 via radial velocity. HD 128311 c is a 3.79-Jupiter-mass companion, with an orbital period of 2.52 years, at 1.740 AU from its star, on an eccentric orbit (e ≈ 0.16), discovered in 2005 via radial velocity.