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C# Sunrise/Sunset with latitude/longitude

Is there a way in C# to calculate given a latitude and longitude when the sun will set and rise for a given day?

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Ian Vink Avatar asked Jan 13 '10 12:01

Ian Vink


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1 Answers

I know this post is old, but in case anyone is still looking...

CoordinateSharp is available as a Nuget package. It's a standalone packge that can handle sun as well as moon times.

Celestial cel = Celestial.CalculateCelestialTimes(85.57682, -70.75678, new DateTime(2017,8,21)); Console.WriteLine(cel.SunRise.Value.ToString()); 

Note:

It assumes DateTimes are always in UTC.

Lastly, you may need to reference the Celestial objects Sun/Moon .Condition if a date returns null. This occurs when the sun is up/down all day.

EDIT 1/9/2019

The library has changed dramatically since this post. It can now handle local times as well.

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Tronald Avatar answered Oct 14 '22 17:10

Tronald