The Indexed Catalogue (IC) is an extension of the NGC catalogue.
The Barnard Catalogue (B) covers dark nebulae.
The King Catalogue contains 27 open clusters described by Ivan R. King between 1949 and 1966.
IC 434 is a faint emission nebula
which is obscured by B33.
B33 is the Horsehead Nebula.
King 14 is a little-known
open cluster in Cassiopeia.
IC 5070, the Pelican Nebula,
is a faint emission nebula just to
the west of NGC 7000.
IC 1396 is a faint emission nebula
in Cepheus
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