The contents and format of the machine-readable version of the cataloque distributed by the Astronomical Data Center are described. Coding for the various scales and abbreviations used in the catalogue are tabulated and certain revisions to the machine version made to improve storage efficiency and notation are discussed. Warren, W. H., Jr. Goddard Space Flight Center NASA-TM-85227, NAS 1.15:85227, NSSDC/WDC-A-R/S-82-29 ...

This book is an updated version of J.L.E. Dreyer's New General Catalogue of Nebulae and Clusters of Stars (1864). In producing this much-needed work, the authors have greatly revised, corrected, and enlarged the following useful information for each entry: NGC identification number; type of object on the Palomar Sky Survey; magnitude of object; source of magnitude; visual appearance of object transcribed from Dreyer; Palomar Sky Survey description of each object; and cross references for RNGC objects. Published 1973.

This essential amateur astronomer's reference is an updated and expanded edition of J. L. E. Dreyer's famous New General Catalogue, providing visual data and notes for 13,226 deep-sky objects.