पृष्ठम्:महाभास्करीयम्.djvu/२२१

136 2 TRUE LONGITUDE OF A PLANET epicycle at Q-8- That is, mandakendraphala (B-d) x Rversin R and sighrakendraphala =B+ (α-8)x Rversin R Similarly, in the third and fourth quadrants. Rule for finding the kendraphala (i.e., mandakendra-phala or sighrakendra-phala): 39(ii). By that (corrected epicycle) multiply the Rsine of the kendra of the desired planet and then divide (the product obtained) by 80; this is known as the (kendra) phala. (whena <B). (when d>B). (corrected manda epicycle) > Rsin (mandakendra) 80 (corrected sighra epicycle) Rsin (sighrakendra) 80 By the mandakendraphala is meant the bahuphala derived from the planet's corrected manda epicycle, and by the sighrakendraphala is meant the bahuphala derived from the planet's corrected sighra epicycle. The method of finding the bahuphala is the same as taught in the case of the Sun. In what follows we shall see how the mandakendraphala and the sighrakendraphala are used in finding the true geocentric longitudes of the planets. Their significance will also then become clear. Procedure to be adopted for finding the true geocentric longitude in the case of Mars, Jupiter, Saturn, Mercury and Venus: 40-44. Calculate half the arc corresponding to the (planet's) mandakendraphala and apply that to the (planet's) mean longi- tude depending on the quadrant (of the planet's kendra) as in the case of the Sun.