Informasi ingkang kamot wonten ing tabèl punika dipunpendhet saking "The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters olèh J. L. E. Dreyer", yang di akses melalui VizieR Service (website: http://vizier.u-strasbg.fr/viz-bin/VizieR), database NASA/IPAC Extragalactic (website: http://nedwww.ipac.caltech.edu/), dan database astronomi SIMBAD (website: http://simbad.u-strasbg.fr/simbad/).