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Re: Wrong times for sunrise/sunset?


From: Marcin Borkowski
Subject: Re: Wrong times for sunrise/sunset?
Date: Thu, 24 Jan 2019 18:01:23 +0100
User-agent: mu4e 1.1.0; emacs 27.0.50

On 2019-01-20, at 16:00, Óscar Fuentes <address@hidden> wrote:

> One possible reason is refraction. A cursory look at solar.el gives the
> impression that refraction is not considered, but the astronomy website
> you referenced does. This can cause a difference of several minutes.
>
> Another possible reason is not using the same geographical point. 20
> kilometers to the west or east can result in minutes of difference.
>
> However, the difference you observe in sunrise (3 minutes) is quite
> larger than the diference in sunset (1 minute). At this time of year,
> this can mean that your position and the position used by the website
> differ on the N/S axis.
>
> Just guessing.

Thanks, one learns something every day!

Best,

-- 
Marcin Borkowski
http://mbork.pl



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