GNU bug report logs - #61460
30.0.50; Calendar shows eclipse for quarter moon

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From: Michael Heerdegen <michael_heerdegen <at> web.de>
To: Ulrich Mueller <ulm <at> gentoo.org>
Cc: 61460 <at> debbugs.gnu.org
Subject: bug#61460: 30.0.50; Calendar shows eclipse for quarter moon
Date: Mon, 13 Feb 2023 09:52:57 +0100

Michael Heerdegen <michael_heerdegen <at> web.de> writes:

> Ulrich Mueller <ulm <at> gentoo.org> writes:
>
> > IIUC, the goal is to calculate the angular distance from the ascending
> > or descending node, whichever is closer. So one wants this:
> >
> >      0° ->  0°
> >     10° -> 10°
> >    ...
> >    170° -> 10°
> >    180° ->  0°
> >    190° -> 10°
> >    ...
> >    350° -> 10°
>
> Ok, thanks.  So the input value is the longitude?

Which (unless I'm misunderstanding in what coordinate system we are
here) would be bad, since the longitude of the lunar nodes is not
constant (the nodes travel along the ecliptic in only 18.6 years)...?

Michael.

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