W Andromedae  W Andromedae is a variable star in the constellation of Andromeda. It is classified as a Mira variable of S-type star, and varies from an apparent visual magnitude of 14.6 at minimum brightness to a magnitude of 6.7 at maximum brightness, with a period of approximately 397.3 days. The star is losing mass due to stellar winds at a rate of 2.79 /yr.