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")
According to the Star Trek: Star Charts, (page 47) Alpha Majoris (Dubhe, Alpha Ursae Majoris) was a quadrinary star system located in or near Federation space, in the Alpha Quadrant. Alpha Majoris A was a K class star with a magnitude of +3, which was ten times brighter than Sol. Alpha Majoris B was a K class star. Alpha Majoris C was a F class star. Alpha Majoris D was an A class star.