Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Iota Cassiopeiae is a star system in the constellation Cassiopeia. It is approximately 141.6 light years from Earth. The primary component, Cassiopeiae A, is a white A-type main sequence dwarf with a mean apparent magnitude of +4.64. It is classified as an ² Canum Venaticorum type variable star and the brightness of the system varies from magnitude +4.45 to +4.53 with a period of 1.74 days. Component A is a spectroscopic binary. Its unresolved companion has an orbital period of 52.4 years and is separated from the primary by 0.113 arcseconds, or at least 5 AU.