The constellation information in these tables is taken 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 types 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.
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R. W. Sinnott, ed. (1988). The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L. E. Dreyer. Sky Publishing Corporation and Cambridge University Press. ISBN978-0-933346-51-2.
^"VizieR Service". Strasbourg astronomical Data Center. Retrieved 18 August 2015.
^"NED". NED–NASA/IPAC Extragalactic Database. Retrieved 18 August 2015.