title: Secular changes in the lunar elements.
abstract: Corrections to the adopted values for centennial rates of change of four elements of the lunar orbit, the location of the FK4 equinox, and the obliquity of the ecliptic are presented. They are derived from analyses of lunar occultations distributed over several centuries. Generally, these corrections help to resolve existing discrepancies between theory and observations.
authors.forename: C F
authors.initials: CF
authors.lastname: Martin
authors.forename: T C
authors.initials: TC
authors.lastname: Van Flandern