The
New General Catalogue (
NGC) is a well-known
catalogue of
deep sky objects in
astronomy. It contains 7,840 objects, known as the
NGC objects. The NGC is one of the largest comprehensive catalogues, as it includes all types of deep space objects and is not confined to, for example,
galaxies.
The catalogue was compiled in the 1880s by
J. L. E. Dreyer using observations mostly from
William Herschel and his son
John, for total of 7,840 objects. Dreyer had already published an update to the Herschel's
Catalogue of Nebulae, but a new update was turned down by the
Royal Astronomical Society, who asked Dreyer to compile a
New General Catalogue.
The NGC was later expanded with two
Index Catalogues (IC I in 1896 & IC II in 1905), adding a further 5,326 objects. Most of these later discoveries had been made possible by the advent of
photography.
Objects in the
southern hemisphere sky are somewhat less thoroughly catalogued, but many were observed by
John Herschel or
James Dunlop. The NGC contained many errors, but a serious if not complete attempt to eliminate them has been undertaken by The NGC/IC Project , after partial attempts with the
Revised New General Catalog (RNGC) by Sulentic and Tifft in 1973, and
NGC2000.0 by Sinnott in 1988.
The NGC was published in the
Memoirs of the Royal Astronomical Society as "A New General Catalogue of Nebulae and Clusters of Stars, being the Catalogue of the late Sir John F.W. Herschel, Bart., revised, corrected, and enlarged." (Dreyer J. L. E., 1888,
Mem. R. Astron. Soc.,
49, 1-237).
See also
