 The equinox coincided with the epoch at the beginning of the Kaliyuga in −3101 and again 3600 years later in 499.The direction changed from prograde to retrograde midway between these years at −1301 when it reached its maximum deviation of 27°, and would have remained retrograde, the same direction as modern precession, for 3600 years until 2299.Another trepidation was described by Varāhamihira ().