TOI-4311 is an orange K-type dwarf (about 0.82 solar masses, 5,063 K, 0.84 solar radii), 135 light-years from Earth. TOI-4311 b is a 4.5-Earth-mass planet, with an orbital period of 23.8 hours, at 0.018 AU from its star, and an equilibrium temperature near 1,664 K, discovered in 2026 via transit. TOI-4311 c is a 13.6-Earth-mass planet, with an orbital period of 15.1 days, at 0.112 AU from its star, and an equilibrium temperature near 671 K, on an eccentric orbit (e ≈ 0.22), discovered in 2026 via transit.