Omega Canis Majoris (ω CMa, ω Canis Majoris) is a star in the constellation Canis Major.
ω Canis Majoris is a blue-white B-type subgiant with a mean apparent magnitude of +4.01. It is approximately 920 light years from Earth. It is classified as a Gamma Cassiopeiae type variable star and its brightness varies from magnitude +3.60 to +4.18.
This star has 6.2 times the radius of the Sun and its outer atmosphere has an effective temperature of 21,019 K.