Caldwell 57 is a dwarf irregular galaxy located in the constellation Sagittarius. It was discovered by Edward Emerson Barnard in 1884, and is commonly known as Barnard's Galaxy. The galaxy is a member of the Local group. It spans a true diameter of roughly 7,000 light-years, making it considerably smaller than the Milky Way. C57 contains several bright HII regions and star-forming nebulae visible in narrowband imaging. The Hubble Space Telescope photographed these individual nebulae and they carry a Hubble naming sequence.

Caldwell 51, also known as IC 1613, is an irregular dwarf galaxy located on the outskirts of the Local group (the galaxy ground that includes our Milky Way) in the constellation of Cetus. Caldwell 51 was discovered in 1906 by Max Wolf, and is approaching Earth at 234 km/s.