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Loading contentA comprehensive catalogue of galaxies begun by Paturel and collaborators, providing a unique 'PGC' identifier, position, and basic parameters for tens of thousands of galaxies. It forms the backbone of the HyperLEDA database, and its PGC numbers are widely used as a standard cross-reference for galaxies lacking a common name.
Facts on this topic will be cited from these primary and reference sources.
Official naming, definitions, constellation boundaries, and astronomical nomenclature.