Dwarf elliptical galaxy

Dwarf elliptical galaxies are  elliptical galaxies that are much smaller than others, classified as dE. They are quite common, and are usually companions to other galaxies. There are at least two dE dwarf ellipticals in orbit around the Andromeda galaxy.Examples of Dwarf Ellipticals:NGC 147 (DDO 3) - type dE5 pec in CassiopeiaSagDIG (Sagittarius Dwarf Irregular Galaxy) - type IB(s)m V in SagittariusNGC 6822 (Barnard's Galaxy) - type IB(s)m IV-V in SagittariusAquarius Dwarf (DDO 210) - type Im V in AquariusIC 5152 - type IAB(s)m IV in IndusPegasus Dwarf Irregular Galaxy (DDO 216) - type Irr in Pegasus
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Any elliptical galaxy which is substantially smaller than the average.