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Bill,

> For ALT are you using Hc?

It does not matter. You can use even eye estimate for the
ALT. The influence of this term is small.
Even tounding to 10 degrees will not affect the result.

> At what time and place is the moon
> SD published in the almanac determined?
> 12:00:00 at Greenwich? Meridian passage at Greenwich?

I also asked myself this question. There is no answer
in the Almanac.
But then when I wrote the exact formula
after Frank's hint, and compared with
the Almanac, I realized that Moon's SD in the almanac is
a very rough estimate,
which seems to be always less than the true value,
so I lost interest to
this question. I wonder what do they include it for.

Alex.



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