/** The SI day, seconds. */
export const SECONDS_PER_DAY: 86400;
/** The Julian year, days (IAU). */
export const DAYS_PER_JULIAN_YEAR: 365.25;
/** The Julian century, days. */
export const JULIAN_CENTURY_DAYS: 36525;
/** The Julian year, SI seconds. */
export const SECONDS_PER_JULIAN_YEAR: number;
/** J2000.0 — 2000 Jan 1.5 TT as a Julian Day (plan 14 step 2: ONE home; it had been
 *  declared locally in model.js, keplerian-chain.cjs, tools/lib/constants.js and three gates). */
export const J2000_JD: 2451545;