HD 164604 is an orange K-type dwarf (about 0.77 solar masses, 4,663 K, 0.78 solar radii), 39.4 light-years from Earth. HD 164604 b is a 13.2-Jupiter-mass companion, with an orbital period of 1.79 years, at 1.362 AU from its star, on an eccentric orbit (e ≈ 0.48), discovered in 2009 via radial velocity. HD 164604 c is a 9.50-Jupiter-mass companion, with an orbital period of 14.7 years, at 5.556 AU from its star, on an eccentric orbit (e ≈ 0.20), discovered in 2026 via radial velocity.