Proper Names Cassiopeia Dwarf Galaxy, Cassiopeia Dwarf Spheroidal Galaxy (abbreviated to Cas dSph) Messier Number None NGC/ IC Number None Other Designations Andromeda VII, PGC 5065047 Constellation Andromeda Right Ascension 23h 26m 32s Declination +50° 40' 33" Distance c.2,576,700 light years c.790,000 parsecs Magnitude Apparent: +13.64 Absolute: -10.93 Mean Diameter Apparent: 2.5' Actual: c.2,000 light years Hubble Type dSph Dwarf Spheroidal Optimum Visibility September / October (Usually visible from northern latitudes) Notes The Cassiopeia Dwarf Galaxy is one of a collection of small galaxies associated with the huge Andromeda Galaxy, M31 (hence its alternative designation of Andromeda VII). Despite being named for Cassiopeia, this galaxy actually lies just within Andromeda, some distance to the north and west of the Andromeda Galaxy itself, on the border where the constellation of Andromeda meets Cassiopeia to the north.
Cassiopeia Dwarf Galaxy is barely visible even in this magnified image, but it can be seen as an extremely faint patch of light extending outward from the central reticle. Zooming in for a closer view will make the faint galaxy slightly easier to detect. Imagery provided by Aladin sky atlas