private void setUTDate(final double JULIAN_DAY) {
        jd_UT = JULIAN_DAY;
        t = (JULIAN_DAY + ttMinusUT / SECONDS_PER_DAY - J2000) / JULIAN_DAYS_PER_CENTURY;
    }
Sets the rise/set times to return. Default is
for the local horizon.

@param T The Twilight.
src/main/java/eu/hansolo/tilesfx/tools/SunMoonCalculator.java