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Re: Mystic 153 calendar

by irvin bromberg :: Rate this Message:

On 2012 Jun 7, at 09:15 , Irv Bromberg wrote:

Using sqr 153 instead of 235/19 we obtain about 365d 6h 33m 24.8s, which is more than 38 minutes longer!
Thus even though the metonic cycle is a poor accuracy lunisolar cycle, using sqr 153 as the average number of months per year yields a much poorer cycle.
The sqr 153 cycle would be much better as a lunisidereal cycle.

Irv adds:

Well, on second thought, maybe it's not such a great lunisidereal cycle either, as the sidereal mean is approximately 365d 6h 9m 10s.

So the sqr 153 cycle mean year is still way too long to serve as a lunisidereal cycle.

-- Dr. Irv Bromberg, University of Toronto, Canada

<http://www.sym454.org/leap/>

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