SunCalcNet 1.0.1

SunCalcNet

A .NET port of the SunCalc JS lib for calculating sun/moon positions and phases.

Usage example

Get position of the sun (azimuth and altitude)

var date = new DateTime(2013, 3, 5, 0, 0, 0, DateTimeKind.Utc);
var lat = 50.5;
var lng = 30.5;

var sunPosition = SunCalc.GetSunPosition(date, lat, lng);

Assert.Equal(-2.5003175907168385, sunPosition.Azimuth, 15);
Assert.Equal(-0.7000406838781611, sunPosition.Altitude, 15);

Get position of the moon (azimuth, altitude, distance and parallactic angle)

var date = new DateTime(2013, 3, 5, 0, 0, 0, DateTimeKind.Utc);
var lat = 50.5;
var lng = 30.5;

var sunPosition = SunCalc.GetMoonPosition(date, lat, lng);

Assert.Equal(-0.9783999522438226, sunPosition.Azimuth, 15);
Assert.Equal(0.0145514822438922, sunPosition.Altitude, 15);
Assert.Equal(364121.37256256194, sunPosition.Distance, 15);
Assert.Equal(-0.59832117604234014, sunPosition.ParallacticAngle, 15);

Get Sun phases

var date = new DateTime(2013, 3, 5, 0, 0, 0, DateTimeKind.Utc);
var lat = 50.5;
var lng = 30.5;

var sunPhases = SunCalc.GetSunPhases(date, lat, lng).ToList();

foreach (var sunPhase in sunPhases)
{
    ...
}

Get Moon Illumination

var date = new DateTime(2013, 3, 5, 0, 0, 0, DateTimeKind.Utc);

var moonIllum = SunCalc.GetMoonIllumination(date);

Assert.Equal(0.4848068202456373, moonIllum.Fraction, 15);
Assert.Equal(0.7548368838538762, moonIllum.Phase, 15);
Assert.Equal(1.6732942678578346, moonIllum.Angle, 15);

About Suncalc.js

SunCalc is a tiny BSD-licensed JavaScript library for calculating sun position, sunlight phases (times for sunrise, sunset, dusk, etc.), moon position and lunar phase for the given location and time, created by Vladimir Agafonkin (@mourner) as a part of the SunCalc.net project.

Most calculations are based on the formulas given in the excellent Astronomy Answers articles about position of the sun and the planets. You can read about different twilight phases calculated by SunCalc in the Twilight article on Wikipedia.

Sun phases

Currently supported sun phases are: