Comments on: Calculating the Moon Phase

By: Happy_2

Happy_2 — Wed, 12 Nov 2008 21:27:24 +0000

I’ll try again, this time without the accidental markup.

Using the value of $jd after the line “$jd -= $b”, subtract $jd from 4 if $jd is less than 4, or from 8 if $jd is greater than 4. Divide the result by 4.

By: Happy_2

Happy_2 — Wed, 12 Nov 2008 21:22:11 +0000

I’m also grateful for the code. (Although that’s a lot of empty lines to delete after copy/paste. )

It looks to me like the percentage lit can be gotten this way: using the value of $jd after the line “$jd -= $b”, take the difference from 4 if $jd 4, and divide that difference by 4.

Thanks again.

By: Happy

Happy — Tue, 07 Oct 2008 02:20:10 +0000

Big THX for this code.

Until today, I have found functions and classes, which calculated moon-phase from 1970 year. That was too small range for me.

This script calculates correctly phase of the Moon and is so simple