History of New moon/details

	Revision 3 . . November 1, 2001 8:18 am by Tompeters [Added info on deviations and durations of lunations.]
	Revision 2 . . October 31, 2001 7:21 am by Tompeters [Added an error discussion.]

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Difference (from prior major revision) (no other diffs)

Added: 27a28,31

Periodic perturbations change the time of true conjunction from these mean values. For all new moons between 1601 and 2401, the maximum difference is 0.592 days = 14h13m in either direction. The duration of a lunation (from new moon to the next new moon) varies in this period between 29.272 and 29.833 days, i.e. -0.259d = 6h12m shorter, or +0.302d = 7h15m longer than average. This range is smaller than the difference between mean and true conjunction, because during the lunation the periodic terms cannot all change to their maximum opposite value.