The Bayer designation Omicron Canis Majoris (ο CMa / ο Canis Majoris) is shared by two stars, in the constellation Canis Major: ο¹ Canis Majoris ο² Canis Majoris They are separated by 2.06° on the sky. ο¹ Canis Majoris was member of asterism 軍市 (Jūn Shì), Market for Soldiers, Well mansion. ο² Canis Majoris was not any member of asterism. References Canis Major Canis Majoris, Omicron