Bharatiya Jyotihshastra (History of Indian Astronomy), translated by R. V. Vaidya v2.c12.s2.t8.2

v2.c12.s2.t8.2

The 14th couplet of the Pañcasiddhāntikā states the number of intercalary months and other items as given by the Sūrya Siddhānta. The 26th couplet of the 9th chapter and all the Seven couplets of the 10th chapter, explain the methods of calculating (the places of) the sun, the moon and of eclipses etc. All the six couplets from the 11th chapter appear to give the explanation of only the eclipses as given by the Sūrya Siddhānta itself, and all the 27 couplets from the 16th chapter deal with the mean places of Mars and other planets, and the method of finding their true places, the question of retrograde and direct motions, the rising and setting etc.