the astronomical constants. Here I take the anomalistic month as an example to demonstrate how this can be done.</p><p>Let floor(x) denote the greatest integer smaller than or equal to x, and<br>mod(X,Y) = X - Y&middot;floor(X/Y)<br>be the remainder of X divided by Y.</p><p>Suppose in a hypothetical almanac the superior epoch is calculated to be 10,000 years from a particular winter solstice and the tropical year is taken to be <span class="nowrap">(365 + 97/400)</span> days = 365.2425 days. Suppose it was 