The Pegasus Dwarf is a companion of the Andromeda Galaxy in the Local Group.

In 1975 Tully & Fisher determined that it was part of the Local Group.

[3] The metallicity and the related distance estimate has been subject to discussions in the scientific literature, with varying results; however, recently, by use of the tip of the red-giant branch, a distance within 10% error was achieved in 2000[4][5] and then improved to 3% in 2005.

[2] The science fiction television series Stargate Atlantis takes place in the "Pegasus galaxy" and has shown images of an irregular galaxy.

However, the franchise has not explicitly stated if it is the Irregular, Spheroidal, or an entirely fictional location,[6] but since the series claimed the Pegasus galaxy to be 3 million light years away, it is likely the irregular one.