The main body of Orion consists of four bright stars, Betelgeuse and Betelgeuse, forming a quadrilateral with an area of 594 square degrees, ranking 26th. Latitude varies from+85 to _ 75, and the best observation month is 1. The brightest star in Orion is Betelgeuse with an apparent magnitude of 0. 12, ranking seventh among all bright stars in the whole day, with an absolute magnitude of -7. 1 and a surface temperature of 12000 Kelvin.