e winter solstice, which is clearly inconsistent with the observation data. To remove the discrepancy, we will need to adjust the value of the anomalistic month to <span class="nowrap">P<sub>a</sub></span> so that <span class="nowrap">mod(3652425,P<sub>a</sub>)</span> = 12.3457. It follows that <span class="nowrap">3652425-12.3457</span> is an integer multiple of <span class="nowrap">P<sub>a</sub></span>, or <span class="nowrap">P<sub>a</sub></span> = 3652412.6543/n, where n is a positive integer. It is des