meeusjs
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Implementation of the Astronomical Algorithms of Jean Meeus in Javascript
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HTML
<html>
<head>
<meta charset="utf-8"></meta>
<meta name="viewport" content="width=device-width"></meta>
<title>Examples Tests</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<script src="./lib/Astro.js"></script>
<script src="./lib/Astro.Coord.js"></script>
<script src="./lib/Astro.DeltaT.js"></script>
<script src="./lib/Astro.Globe.js"></script>
<script src="./lib/Astro.Interp.js"></script>
<script src="./lib/Astro.JulianDay.js"></script>
<script src="./lib/Astro.Math.js"></script>
<script src="./lib/Astro.Moon.js"></script>
<script src="./lib/Astro.MoonIllum.js"></script>
<script src="./lib/Astro.Nutation.js"></script>
<script src="./lib/Astro.Parallax.js"></script>
<script src="./lib/Astro.Refraction.js"></script>
<script src="./lib/Astro.Rise.js"></script>
<script src="./lib/Astro.Sidereal.js"></script>
<script src="./lib/Astro.Solar.js"></script>
</head>
<body>
<h1>MeeusJs</h1>
<div>Observer: Zurich, lat: 47.3957, lng:8.4867<div>
<div id="date"></div>
<h2>Sun position</h2>
<div id="sunpos"></div>
<h2>Moon position</h2>
<div id="moonpos"></div>
<h2>Moon illumination</h2>
<div id="moonillum"></div>
<h2>Sun times</h2>
<div id="suntimes"></div>
<h2>Moon times</h2>
<div id="moontimes"></div>
<script>
function update() {
var date = new Date(); // now
var jdo = new A.JulianDay(date);
var coord = A.EclCoord.fromWgs84(47.3957, 8.4867, 440);
var suntp = A.Solar.topocentricPosition(jdo, coord, true);
var moontp = A.Moon.topocentricPosition(jdo, coord, true);
var i = A.MoonIllum.phaseAngleEq2(moontp.eq, suntp.eq);
var k = A.MoonIllum.illuminated(i);
$('#date').text(date.toString() + ", jd:" + jdo.jd);
$('#sunpos').text(suntp.hz.toString());
$('#moonpos').text(moontp.hz.toString() + ", dist:" + moontp.delta);
$('#moonillum').text("phase:" + i + ", illuminated:" + k);
}
window.setInterval(update, 1000); // refresh every second
</script>
<script>
var date = new Date(); // now
var jdo = new A.JulianDay(date);
var coord = A.EclCoord.fromWgs84(47.3957, 8.4867, 440);
var suntimes = A.Solar.times(jdo, coord);
var moontimes = A.Moon.times(jdo, coord);
$('#suntimes').text("rise:" + A.Coord.secondsToHMSStr(suntimes.rise) +
", transit:" + A.Coord.secondsToHMSStr(suntimes.transit) +
", set:" + A.Coord.secondsToHMSStr(suntimes.set));
$('#moontimes').text("rise:" + A.Coord.secondsToHMSStr(moontimes.rise) +
", transit:" + A.Coord.secondsToHMSStr(moontimes.transit) +
", set:" + A.Coord.secondsToHMSStr(moontimes.set));
</script>
</body>
</html>