This reasoning relies on the mean length of a lunation. But the actual case is more complicated. See my reply to John on this same subject.
Jim ------------------- ---------------------- -------------------- | Jim Cobb | 540 Arapeen Dr. #100 | [EMAIL PROTECTED] | | Parametric | Salt Lake City, UT | (801)-588-4632 | | Technology Corp. | 84108-1202 | Fax (801)-588-4650 | ------------------- ---------------------- -------------------- Gregor Samsa awoke one morning to find himself transformed into an enormous software defect. -- Hindin Joseph > I think it pretty well follows. Consider the latest possible case, where a > full moon falls late on January 31. February will have no full moon, even > in a leap year, with a 29.5 day sidereal month. That puts the next full > moon on either March 1st or 2nd, and the *next* full moon will fall on > March 30 or 31. > > I: 31/01 23:50 > plus 29 12:00 > 60/01 35:50 > corr 61/01 11:50 > corr -31 (leap year) > 30/02 11:50 30/02 11:50 > corr -28 -29 > II: 02/03 11:50 01/03 11:50 > 29 12:00 29 12:00 > III: 31/03 23:50 30/03 23:50 > > If the first full moon falls earlier on January 31, the third one will > still be within March... > > Dave > >
