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| Gamma Cassiopeia is an interesting variable, a shell star which is ejecting rings of gas due to its rapid rotation. The visual magnitude thus varies between about 3.0 to as bright as 1.6, although usually it is around 2.5.
The patient observer with binoculars might discover visible differences in its visual magnitude over the course of a single evening: binoculars. Further to the east of gamma is delta and the Messier object M103, fifty or so stars about 4000 light years away : binoculars. |