The planet, with a mass of at least 1.85 times that of Jupiter, is one of the few known to lie within a double-star system, and orbits the main star Gamma Cephei A with a period of 2.47 years at an average distance of 2.05 Astronomical Units (307 million kilometers, 191 million miles)
Errai (Gamma Cephei) (stars.astro.illinois.edu)Errai (Gamma Cephei) is the among the visually brightest stars to host a planet, and also has a low mass companion with a relatively small orbit.