Alpha Persei can be observed with the unaided eye and lies between the Pleiades Cluster and the North Star (Polaris). View Alpha Persei in 3D! Star Characteristics and Features. Alpha Persei is a supergiant star that is evolving into the last stages of its existence. It is approximately 60 times the size of the Sun and has 7.3 solar masses. In fact, if Mirfak was situated where the Sun is from Earth, it would cover several thousand times more sky.