galactic/dist/amd/galactic/dates.js

Celestial coordinate conversions and utilities

(function() {

  define("galactic/dates", [], function() {
    "use strict";

    var Dates;
    Dates = {
      msPerDay: 1000 * 60 * 60 * 24,
      J2000: 2451545,
      JUnixEpoch: 2440587.5,
      unixDateToJulian: function(unix) {
        return (unix / Dates.msPerDay) + Dates.JUnixEpoch;
      },
      julianDateToUnix: function(julian) {
        return (julian - Dates.JUnixEpoch) * Dates.msPerDay;
      },
      julianDateToGMST: function(julian) {
        return (18.697374558 + 24.06570982441908 * (julian - Dates.J2000)) % 24;
      }
    };
    return Dates;
  });

}).call(this);