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Principal Galaxies Catalog

(modern catalog of more than 70k galaxies)

The Principal Galaxies Catalog (PGC) is a 1989 catalog of seventy thousand galaxies. Each cataloged galaxy has a PGC identifier/number, e.g., PGC 2557 for Andromeda.

The PGC is an enhancement to the 1983 Lyon-Meudon Extragalactic Database (LEDA) produced at Lyon Observatory. A further enhancement is HyperLEDA, a web-accessible database of over a million galaxies plus other extragalactic objects. The three are consistent in associating galaxy with number so LEDA 42102 and PGC 42102 are equivalent, though HyperLEDA maintainers recommend using J2000 coordinates to identify its million-plus galaxies.

LEDALEDA 42102Principal Galaxies Catalogprecursor to PGC
PGCPGC 2557Principal Galaxies Catalog 

Referenced by:
astronomical catalog
Council of Giants
IC 342