Iota Canis Majoris

Iota Canis Majoris (ι Canis Majoris, ι CMa) is a variable supergiant star in the constellation Canis Major.
Iota Canis Majoris is a blue-white B-type supergiant with an apparent magnitude that varies between +4.36 and +4.40. It has been classified as a Beta Cephei type variable star, but the supergiant spectral type and a period of over a month mean it is no longer considered to be of that type. It is approximately 3,100 light years from Earth. This star has 24.9 times the radius of the Sun.