We will now deal with the equation for Saturn in the Jupiter- Saturn inequality.
3102 is added to the Year of Birth and then 4660 is deducted from it. Then that value is subtracted by 918 and multiplied by 360. Then that value is mulitplied by 2873 seconds and then the resultant value is minussed from Saturn’s longitude ( if his longitude is less than 180 ) and added ( if his longitude is greater than 180 ).
Mathematically,
KY ( kali year ) = Year ( Date of Birth ) +3102
kyb = KY – 4660
x, bhujamsa = ( kyb )/918 * 360
y, bhujajya = sin (x )
satvalue = sin (x ) * 2873
If Mean Longitude of Saturn < 180
Sat’s corrected Long = Sat’s long – satvalue
If Longitude of Saturn > 180
Sat’s corrected Long = Sat’ long + satvalue
Western Astronomy gives the perturbation amplitude as .812 degrees which is similar to the Indian value of 2873 seconds. Similar values are not exactly the same and hence neither borrowed from each other !