24 Rationale I. The grahatanu for the Moon denotes the number of mean solar days elapsed since the beginning of Kaliyuga or the mean longitude of the Sun in revolutions, etc., reduced to degrees. Since therefore - MEAN LONGITUDE OF A PLANET mean longitude of the Moon in revolutions etc. mean longitude of the Sun in revolutions etc. revolution-number of the Moon revolution-number of the Sun 57753336 4320000 13 + 83/225 • 264/4320000 1383/225-11/(50×60×60), mean longitude of the Moon =13x (mean longitude of the Sun) 83 x G 225 + degrees where G is the grahatanu for the Moon. Rationale II. 57753336 4320000 The mean motion of the Moon per solar day degrees 83 -{13+ 2/3} 225 11 x G 50 degrees - {13G + 836 } = 225 + Therefore, the mean motion of the Moon for G solar days, i.c., the mean longitude of the Moon degrees 13 x Sun's mean longitude 83G 225 degrees seconds, 11G 50 11 50 of a second 11G 50 seconds seconds.
