Gamma Cassiopeiae (γ Cas / γ Cassiopeiae) is an eruptive variable star, whose brightness changes irregularly between +2.20 mag and +3.40 mag. Although it is a fairly bright star, it has no traditional Arabic or Latin name. Most stars are of nearly constant luminosity. ...
Its brightness was +2.2 mag in 1937, +3.4 mag in 1940, +2.9 mag in 1949, +2.7 mag in 1965 and now it is +2.47 mag. Gamma Cassiopeiae is of spectral type B0IVe. In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequently refined in terms of other characteristics. ...
Gamma Cas is an eruptive variable and has given its name to a category of similar objects (see GammaCassiopeiae star).
Gamma Cas is a member of a visual double system and is also a member of a spectroscopic binary with a period of 203.59 days, an eccentricity of 0.26, and a companion with about the same mass as the Sun.
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