Formulae for computing Asc Difference and the Sun's declination

The Ascensional Difference is the difference between Oblique Ascension and Right Ascension.


The formula for computing the Ascensional Difference

Sin C = Tan Phi Tan Delta


where C is the Asc difference Phi is the Latitude of the place and Delta the Sun's declination

The Sun's declination can be found out by the formula

Sin J = Sin L Sin w

where J is the Sun's declination, L the mean longitude of the Sun and w Sun's maximum declination