4 Cassiopeiae

4 Cassiopeiae is a wide binary star system in the northern constellation of Cassiopeia, located approximately 790 light-years away from the Sun. It is visible to the naked eye as a faint, red-hued star with a baseline apparent visual magnitude of 4.96. At the distance of this system, its visual magnitude is diminished by an extinction of 0.56 due to interstellar dust. This system is moving closer to the Earth with a heliocentric radial velocity of −39 km/s.
The primary member of this system, component A, is an evolved red giant star, currently on the asymptotic giant branch, with a stellar classification of M2− IIIab. It is a suspected variable star of unknown type with a brightness that varies from visual magnitude 4.95 down to 5.00. As of 2011, the magnitude 9.88 secondary, component B, lay at an angular separation of along a position angle of 226° relative to the primary. In the sky, the open cluster Messier 52 is 40' to the south of it, near the constellation border with Cepheus.