David Dunlap Observatory Catalog
(catalog of dwarf galaxies)
The David Dunlap Observatory Catalog is a 1950s catalog
of dwarf galaxies from observations
at David Dunlap Observatory,
an observatory north of Toronto,
Canada housing a 1.9-meter reflector telescope dating from 1935,
which is currently used for education.
The catalog introduced an enhanced galaxy type, including a
luminosity class analogous to the existing stellar luminosity classes,
each including a subsequent Roman numeral, I, II, etc.
Note that as a galaxy luminosity class, V indicates
a typical dwarf galaxy luminosity.
Referenced by pages: