The astronomical catalogue is composed mainly of star clusters, nebulae, and galaxies.
Other objects in the catalogue can be found in the other subpages of the list of NGC objects.
The constellation information in these tables is from The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L. E. Dreyer,[1] which was accessed using the VizieR Service.
[2] Galaxy morphological types and objects that are members of the Small Magellanic Cloud are identified using the NASA/IPAC Extragalactic Database.
[3] The other data of these tables are from the SIMBAD Astronomical Database[4] unless otherwise stated.