HIP 111909 is an orange K-type dwarf (about 1.28 solar masses, 4,891 K, 4.53 solar radii), 88.1 light-years from Earth. HIP 111909 b is a 1.21-Jupiter-mass companion, with an orbital period of 1.33 years, at 1.320 AU from its star, discovered in 2025 via radial velocity. HIP 111909 c is a 0.81-Jupiter-mass companion, with an orbital period of 2.45 years, at 1.970 AU from its star, discovered in 2025 via radial velocity. The planet betrayed itself through the star's reflex motion — a technique that first revealed worlds around Sun-like stars in the 1990s and remains a workhorse of exoplanet discovery.

HIP 111909 - System

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