David Dunlap Observatory Catalogue


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.

Examples

DDO 3

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

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 as well.

DDO 69

is an irregular galaxy which is located in the constellation of Leo. It is a small satellite galaxy of our galaxy, the Milky Way.

DDO 70

is an irregular galaxy which is in the constellation of Sextans. It is located 4.44 million light years away from Earth.

DDO 74

lies approximately 820,000 light years away in the constellation Leo. It is one of the most distant satellite galaxy of our Milky Way. The dwarf spheroidal galaxy is located only 12 arcminutes from Regulus, and the light from Regulus makes the visibility of DDO 74 becomes poor, so it is difficult to be observed.

DDO 75

is an irregular galaxy located in the constellation Sextans, same as its neighbour DDO 70. When it is observed from Earth, it appears as a square in shape.

DDO 82

is a Magellanic spiral galaxy lies 13 million light years away in the constellation Ursa Major.

DDO 93

is a dwarf spheroidal galaxy which is located in the constellation of Leo. It was discovered in 1950 by Robert George Harrington and Albert George Wilson. It is one of the satellite galaxies of the Milky Way.

DDO 155

is a dwarf irregular galaxy located approximately 7.9 million light years away from Earth in the constellation of Virgo. People give a nickname to this galaxy, called 'Imprint of a Foot' because of its shape.

DDO 169

DDO 169 is a dwarf irregular galaxy in the constellation Canes Venatici. It is one of the members of the M51 Group.

DDO 190

DDO 190 is a dwarf irregular galaxy which is located in the constellation of Boötes. It is a member of the M94 Group as well.

DDO 199

is a dwarf spheroidal galaxy which is located in the northern constellation of Ursa Minor. It was discovered in 1955 by an American astronomer Albert George Wilson. It is a satellite of the Milky Way as well.

DDO 210

is a dwarf irregular galaxy in the constellation of Aquarius. It is a member of the Local Group and lies 3.2 ± 0.2 million light years from our Milky Way.

DDO 216

is a dwarf irregular galaxy located in the constellation Pegasus.