Re: Online calculators for position angle

Mark Gingrich wrote:
> William Kahan['s] original solution to this very problem [of small angle
> angular distances, not position angle] -- a solution he claims is both
> accurate for *any* angular separation and efficient:
> http://www.cs.berkeley.edu/~wkahan/Math128/angle.pdf

That's an interesting implementation - convert the two positions to the
X,Y,Z coordinates on a unity sphere and then use the 3-D Pythagorean
formula. Meeus's small angluar distance formula is basically the
same, except he uses the 2-D Pythagorean formula.

- Canopus56

P.S. - My original-top-posted question wen to online calculators for
position angles, and not angular-size. I have good tested code for
both normal and small angular distances.

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