HD 50554 is a Sun-like G-type star (about 1.04 solar masses, 5,987 K, 1.02 solar radii), 31.2 light-years from Earth. HD 50554 b is a 4.95-Jupiter-mass companion, with an orbital period of 3.54 years, at 2.353 AU from its star, on an eccentric orbit (e ≈ 0.50), discovered in 2002 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. The planet's marked eccentricity suggests past scattering events or perturbations from unseen companions.