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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | 1x 1x 1x 16x 16x 16x 13x 13x 13x 13x 13x 13x 3x 3x 3x 3x 3x 3x 16x | import ifpos from "../ifpos";
import ifnav from "../ifnav";
/**
* Converts a Julian Day (JD) to a Gregorian date and time.
* ---
*
* @param jd - The Julian Day to convert.
* @returns An object containing the year, month, day, hour, minute, and second of the Gregorian date and time at UT.
*
* @example
* const jd = 2459345.5;
* const result = toGregorian(jd);
* console.log(result);
* // Output: { year: 2021, month: 1, day: 1, hour: 0, minute: 0, second: 0 }
*/
export default function toGregorian(jd: number) {
const jj = ifpos(jd);
const kk = ifnav(jd);
let year, month, day, hour, minute, second;
if (jd > 0) {
year = jj.year;
month = jj.month;
day = jj.day;
hour = jj.hour;
minute = jj.minute;
second = jj.second;
} else {
year = kk.year;
month = kk.month;
day = kk.day;
hour = kk.hour;
minute = kk.minute;
second = kk.second;
}
return {
year,
month,
day,
hour,
minute,
second,
};
}
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