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Steve Gottlieb, « Some Corrections to the RNGC - 2 », Webb Society Quarterly Journal, vol. 72, , p. 1 (lire en ligne, consulté le )
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J.W. Sulentic et W.G. Tifft, The revised new catalogue of nonstellar astronomical objects, Tucson (Arizona), University of Arizona Press, (lire en ligne)
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R.W. Sinnott, NGC 2000.0, The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J.L.E. Dreyer, Cambridge, Sky Publishing Corporation and Cambridge University Press, (lire en ligne)
