This can be directly computed using astronomical formulas. If you
actually want to see the formulas and the explanation of their use, the
best reference I know of is Astronomical Formulae for Calculators by
Jean Meeus. The moon is particularly tricky but you can get things to
the second for any position and time within 10,000 years or so.


wrote:
I'd already come across that reference. But it doesn't explain where
the times come from (unless I'm missing something). Here are the moon
rise/set and sun rise/set times for Aug. 30 for lat 35d 25m N and 89d
6m W (in Indiana):

MR: 02:51
MS:18:36
SR: 07:11
SS: 20:18

According to the Daily.exe file you can download from www.solunar.com,
the Minor Solunar Times for this date are 02:06 and 14:31 and the major
times are 08:19 and 20:44.
The P.M. times are about 12.5 hours later than the A.M. times but I
just can't see where 02:06 and 08:19 come from.

Can anyone shed any light?

Thanks,

Gary.