The First U.S. Naval Observatory Robotic Astrometric Telescope Catalog (URAT1)

Norbert Zacharias, Charlie Finch, John Subasavage +14

URAT1 is an observational, astrometric catalog covering most of the Dec >= -15 deg area and a magnitude range of about R = 3 to 18.5. Accurate positions (typically 10 to 30 mas sta…