Function calculateTimeData

Example

const data = calculateTimeData({
  year: 2000, month: 1, day: 1,
  hour: 12, minute: 0, second: 0,
  timezone: 0,
  latitude: 51.5, longitude: -0.1
});

console.log(data.julianDate); // 2451545.0
console.log(data.localSiderealTime); // ~degrees
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