A Federation star chart depicting the location of Alpha Majoris
Alpha Majoris was a star, the primary of the Alpha Majoris system. The system included the planet Alpha Majoris I. (TOS: "Wolf in the Fold") The location of Alpha Majoris was depicted on a Federation star chart in 2293. It was located near Omega Cygni, Pollux IV, and the galactic barrier. (Star Trek VI: The Undiscovered Country)
The first planet of the system was home to an animal known as the Mellitus, a "cloud creature". In its normal state, it existed as a gas held together by a highly cohesive electromagnetic field. When the mellitus stopped, it became solid. These abilities were considered similar to those possessed by the Redjac entity. (TOS: "Wolf in the Fold")