Quote:
Originally Posted by mithrandir
Joe, is that supposed to be read as:
(14 * N * P / FL) * cos(d)
or
14 * N * P / (FL * cos(d))
Associative rules for multiplication say the first but it would be good to be sure. I would write that as 14 * N * P * cos(d) / FL which is less likely to be misinterpreted.
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Andrew,
Sorry about that :
It is:-
max exposure time(s) = [14*N*P] / [FL*cos(d)]
I've edited the original post to reflect this.
The cos(d) term is 1 for a declination of 0 so you can leave it out all together if you want to calculate for stars on the celestial equator.