6480-years of ¼ precession of equinoxes is singular spatial quantum of 4D space, while 5184 (1/4 of orbital precession) is singular time quantum. In other words – 1296 years discrepancy between space and time is instant time, therefore spatial component of time. It’s amount of instant change at the end of time cycle of 5184 years, that’s equal to ¼ of total change affected in course of time. 1296 years is inertial overlap or line of symmetry between space and time, because it’s both – end of time and beginning of space. It’s space/time component in between two different time (or spatial) cycles. It’s gravity of space/time that changes in 129600-year periods.