Smithsonian Astrophysical Observatory Catalog (SAO Catalog)A catalogue of 258,997 stars, mostly down to magnitude 8.5 plus a few dimmer stars, published by the Smithsonian Astronomical Observatory in 1966. It identifies objects in the form: SAO ####; for example, Vega is listed as SAO 67174. Related category ASTRONOMICAL CATALOGSAlso on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History |