Although its variations are slight, Gomeisa is classified as a shell star ( Gamma Cassiopeiae variable ), with a maximum magnitude of 2.84 and a minimum magnitude of 2.92.
12.
It is a ? Cas variable, a type of shell star with a circumstellar disc of gas surrounding the star at the equator, ranging from 5.05 to 4.85 magnitude.
13.
Although the Be type spectrum is most strongly produced in class B stars, it is also detected in O and A shell stars, and these are sometimes included under the " Be star " banner.
