Astrology Course

Rule To Find the Sidereal Time at Birth

To the Sidereal Time at noon previous to birth given in the ephemeris , we add 1 A correction of 10 seconds for every 15 degrees of longitude the birthplace is west of Greenwich. 2 The interval between the previous noon and the True Local Time of birth. 3 Correction of 10 seconds for every hour of that interval. The sum of these is the Sidereal Time at birth but sometimes the sum is more than 24 hours, and as that is the ultimate length of a day, we simply subtract 24 hours and work with the...