18 Del is a Sun-like G-type star (about 2.10 solar masses, 4,980 K, 8.80 solar radii), 76.2 light-years from Earth. 18 Del b is a 9.21-Jupiter-mass companion, with an orbital period of 2.69 years, at 2.476 AU from its star, discovered in 2008 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. 18 Del b circles in the outer system, comparable to the Jupiter region.