David Dunlap Observatory Catalogue, known as the DDO or A Catalogue of Dwarf Galaxies, is a catalogue of dwarf galaxies that was compiled by Sidney van den Bergh and published by the David Dunlap Observatory in 1959 (and later expanded in 1966). Examples DDO 3 DDO 3 (also known as NGC 147, PGC 2004, UGC 326, LEDA 2004 or Caldwell 17) is a dwarf spheroidal galaxy which is located in the northern constellation of Cassiopeia, near the border of Andromeda. It is a small satellite galaxy of the famous Messier 31, which is the largest galaxy in the Local Group. DDO 8 DDO 8 (also known as IC 1613, PGC 3844, UGC 668 or Caldwell 51) is a dwarf irregular galaxy in the constellation Cetus, near the border of Pisces. It was discovered in 1906 by a German astronomer Max Wolf. It is a member of the Local Group. DDO 69 DDO 69 (also known as Leo A, Leo III, PGC 28868 or UGC 5364) is an irregular galaxy which is located in the constellation of Leo. It is a small satellite galaxy of the Milky Way. DDO 70 DDO 70 (also known as Sextans B, PGC 28913 or UGC 5373) is an irregular galaxy which is in the constellation of Sextans. It is located 4.44 million light years away from Earth. DDO 74 DDO 74 (also known as Leo I, Regulus Dwarf, PGC 29488 or UGC 5470) lies approximately 820,000 light years away in the constellation Leo. It is one of the most distant satellite galaxy of the Milky Way. The dwarf spheroidal galaxy is located only 12 arcminutes from Regulus (α Leonis), and the light from Regulus makes the visibility of DDO 74 becomes poor, so it is difficult to be observed. DDO 75 DDO 75 (also known as Sextans A, PGC 29653 or UGCA 205) is an irregular galaxy located in the constellation Sextans, same as its neighbour DDO 70 (Sextans B). When it is observed from Earth, it appears as a square in shape. DDO 82 DDO 82 (also known as PGC 30997, UGC 5692, MCG+12-10-045 or CGCG 333-35) is a Magellanic spiral galaxy lies 13 million light years away in the constellation Ursa Major. DDO 93 DDO 93 (also known as Leo II or PGC 34176) is a dwarf spheroidal galaxy which is located in the constellation of Leo. It was discovered in 1950 by