8/19/08

Saros 145



2 comments:

狂人 - Paul Sin said...

Thank you! So in short, apart from using cycles and adjustments, there's no parsimonious formula of calculating the next eclipse... Then how could those eclipse calculators (usually written in Java) do that?

道士 said...

Yes, so far from what I read, I can't find a more simple equation that generalize all solar eclipse. However, eclipse calculators should be simple and reasonably accurate in a ranged period, say within few thousands years with initial conditions set, cause all sequences after is very regular. For a simple version of such a calculator, I imagine it should input the initial conditions of the ongoing 40 ~ saros series, what follows is simple multiplication and addition. I can't start imagining how much math the one NASA's use to calculate eclipses, it looks too complicated for me.