Smaller lunar elliptic diurnal constituent. This 1 constituent, with J , modulates the amplitude of the d 1 eclinational K , for the effect of the Moon's elliptical orbit. A 1 1 slightly slower constituent, designated (M ), with Q , modulates the amplitude and frequency of the declinational O1 , for the same effect. Speed = T - s + h + p = 14.496,693,9 per solar hour