Every time - sai brother Othon ,and ever the Armenian files - we,ve observed the moon,then we,ve could think that have the possibilitie to have an very serius movement of nutation,howewer its ease to deduce it, when its own perihelion with the sun.So we can abstract:
( a). sun
Perihelion
moon -sun =. ( b) earht
( c). moon ( aexis desviation ).
