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CAT: USNO A2.0 / CMC (14-15) OBJECT DATE MAG +/- N OBS CAT -------- ------------ --------- ----- -- --- --- 2018zd 20180319.941 13.44R 0.01 7 USN CAT: USNO A2.0 / CMC (14-15) OBJECT DATE MAG +/- N OBS CAT -------- ------------ --------- ----- -- --- --- 2018zd 20180324.940 13.56R 0.01 13 USN