14 trignometric corrections for the Moon's longitude

In the Western system, the Moon's mean longitude is subjected to 6 trignometric corrections. ( There are actually 300 ).

In the Indian Sidereal System, the Moon is subjected to 14 trignometric corretions, the Chatur Vidha Jya samskara. All the major perturbations of the Moon- the Parallactic Equation, the Evection, the Variation, the Annual Equation - are taken into consideration.