16 Cyg B is a Sun-like G-type star (about 1.08 solar masses, 5,750 K, 1.13 solar radii), 21.1 light-years from Earth. 16 Cygni B b is a classic high-eccentricity giant, likely pumped by the distant companion star 16 Cygni A. 16 Cyg B b is a 1.78-Jupiter-mass companion, with an orbital period of 2.19 years, at 1.660 AU from its star, on an eccentric orbit (e ≈ 0.68), discovered in 1996 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.