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Date: 2011-06-14 14:05:23Celestial coordinate system Astronomy Celestial mechanics Standards organizations SOFA Naval Observatory Vector Astrometry Subroutines Sidereal time International Celestial Reference System Nutation Measurement Astrology Astrometry | UNITED STATES NAVAL OBSERVATORY CIRCULAR NO. 179 U.S. Naval Observatory, Washington, D.C[removed]Oct 20Add to Reading ListSource URL: aa.usno.navy.milDownload Document from Source WebsiteFile Size: 1,52 MBShare Document on Facebook |