Tan K + Tan R/ cos w
K + Dasama Bhava Sphuta, MC
R – Longitude of Sun ( Mean ) , Sayana Ravi Madhyamam
w- Sun’s maximum declination, 23 deg and 27 mins, + in North and – in South Celestial Hemispheres.
RAMC, Right Ascension of the Meridian Cusp, is reduced by this equation to
Ecliptic or Kranti Vritteeya Longitudes !
Dasama = MC = Madhya Lagna
Chaturtha – IC = Patala Lagna
Ascendant = Udaya Lagna = Ascending Sign
Descendant = Astha Lagna = Descending Sign
