Determination of the Corrections for the Nutational Constant

In this present article it is proposed that in the method for finding the corrections for processional constants by comparing the proper motions of stars with those listed in a catalogue when an extragalactic system is used as the reference source, the effect of the error in the, nutational constants should be considered at the same time, and the corrections to the adopted nutational constants are determined when the corrections to the adopted processional constants are found.