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", ingkang dipunundhuh medal VizieR Service (website: http://vizier.u-strasbg.fr/viz-bin/VizieR), database NASA/IPAC Extragalactic (website: http://nedwww.ipac.caltech.edu/), lan database astronomi SIMBAD (website: http://simbad.u-strasbg.fr/simbad/).