Mostly, the name was restricted to the four bright stars in the constellation – Alpha, Beta, Gamma and Delta Delphini. MAJOR STARS IN DELPHINUS. α Delphini (Alpha Delphini). Alpha Delphini is the brightest star in the constellation.OCATION, FACTS & MAP. Delphinus is the 69th constellation in size, occupying an area of 189 square degrees. It lies in the fourth quadrant of the northern hemisphere (NQ4) and can be seen at latitudes between +90° and -70°. The neighboring constellations are Aquarius, Aquila, Equuleus, Pegasus, Sagitta, and Vulpecula.