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SatAgro / suntime

Simple sunset and sunrise time calculation python library.
GNU Lesser General Public License v3.0
110 stars 39 forks source link

North and south latitude problems #15

Closed Thornye closed 3 years ago

Thornye commented 3 years ago

Unable to get sunrise or sunset on South and North Pole as latitude limited to about 85N and 87S. Math issue or bug in the module?

deepweather commented 3 years ago

South and North Pole might have no sunset or sunrise

Thornye commented 3 years ago

Actually they do. Geographically sunrise March 21 and sunset September 21 on the North pole. Opposite in the south.

marvingabler commented 3 years ago

Yes, sunrise and sunset happen a few times a year at the poles.

You were asking why you are unable to get a sunrise or sunset for a specific day at the poles, and the answer is still because there might be no sunset or sunrise to return. This lib calculates the sunrise/sunset for a specific day.

Thornye commented 3 years ago

Still there seems to be a bug or maybe a math issue, and I just wanted the authors to be aware.