Lunar Ephemeris and Astrometric Corrections from Occultations

A comprehensive analysis of 7000 occultation observations between 1950 and 1969 has resulted in a set of corrections to the lunar ephemeris and to the fundamental reference system. The results are presented in Table I. The large correction to the location of the FK4 equinox should be noted. The largest periodic term introduced into the lunar ephemeris from any one of these corrections has an amplitude of 0.14 sec of arc. The entire set of periodic corrections may accumulate to 0'.'24 in longitude and o' 18 in latitude.