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bug#61460: 30.0.50; Calendar shows eclipse for quarter moon
From: |
Michael Heerdegen |
Subject: |
bug#61460: 30.0.50; Calendar shows eclipse for quarter moon |
Date: |
Mon, 13 Feb 2023 09:13:00 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) |
Ulrich Mueller <ulm@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?
> The only thing that I don't understand is the constant 0.37. I would
> have expected pi/2 (= 90°) there. Probably it doesn't matter, because
> below it checks for (< moon-lat 0.37), so any larger value will be
> ignored.
Maybe you gained slightly faster code on a really old computer - the
book that is mentioned in the code is quite old. In theory this allows
you to get rid of one `if' statement (the comparison against 0.37 is
performed anyway). And yes, it doesn't affect the result.
Michael.
- bug#61460: 30.0.50; Calendar shows eclipse for quarter moon, Ulrich Mueller, 2023/02/12
- bug#61460: 30.0.50; Calendar shows eclipse for quarter moon, Ulrich Müller, 2023/02/12
- bug#61460: 30.0.50; Calendar shows eclipse for quarter moon, Michael Heerdegen, 2023/02/12
- bug#61460: 30.0.50; Calendar shows eclipse for quarter moon, Michael Heerdegen, 2023/02/12
- bug#61460: 30.0.50; Calendar shows eclipse for quarter moon, Michael Heerdegen, 2023/02/13
- bug#61460: 30.0.50; Calendar shows eclipse for quarter moon, Michael Heerdegen, 2023/02/13
- bug#61460: 30.0.50; Calendar shows eclipse for quarter moon, Ulrich Mueller, 2023/02/13
- bug#61460: 30.0.50; Calendar shows eclipse for quarter moon,
Michael Heerdegen <=
- bug#61460: 30.0.50; Calendar shows eclipse for quarter moon, Michael Heerdegen, 2023/02/13
- bug#61460: 30.0.50; Calendar shows eclipse for quarter moon, Ulrich Mueller, 2023/02/13
- bug#61460: 30.0.50; Calendar shows eclipse for quarter moon, Michael Heerdegen, 2023/02/13
- bug#61460: 30.0.50; Calendar shows eclipse for quarter moon, Eli Zaretskii, 2023/02/13
- bug#61460: 30.0.50; Calendar shows eclipse for quarter moon, Ulrich Mueller, 2023/02/13
- bug#61460: 30.0.50; Calendar shows eclipse for quarter moon, Eli Zaretskii, 2023/02/13
- bug#61460: 30.0.50; Calendar shows eclipse for quarter moon, Michael Heerdegen, 2023/02/14
- bug#61460: 30.0.50; Calendar shows eclipse for quarter moon, Ulrich Mueller, 2023/02/14
- bug#61460: 30.0.50; Calendar shows eclipse for quarter moon, Michael Heerdegen, 2023/02/14
- bug#61460: 30.0.50; Calendar shows eclipse for quarter moon, Ulrich Müller, 2023/02/14