vs. 33-37(i)] Libra. Then after subtracting (the longitude of) the mamdb८a from that (result), the entire bahuplala (derived from that differ ence), reduced to arc, should be applied (as correction, positive or negative) to the mean longitude of the planet (according as the 7207idak८rada is in the half-orbit beginning with the sign Libra or in that beginning with the sign Aries) this (result) is known as the true-mean longitude (of the planet) (Then) after subtracting the resulting quantity (viz. the true mean longitude of the planet) from the ॐghr0ca, the entire cor rection obtained by the sgrocca process, reduced to arc, should be applied (as correction, positive or negative,) to the true-mean longitude of the planet (according as the $ghrakendra is in the half-orbit beginning with Aries or in that beginning with Libra): thus is obtained the true longitude of the planet.! 37 This procedure is adopted in the case of Mars,Jupiter, and Saturrm Thus, in order to obtain the true longitude of Mars,Jupiter, or Saturn, one should proceed as follows First calculate the mean longitude of the planet (as corrected for the longitude, bhajantara, and ८ara corrections). Then subtract therefrom the longitude of the planet's mando८a (apoge): this gives the mardalk८rudra. Cal culate the corresponding bgja, and therefrom the blujahala by the appli cation of the formula: Rsin (bhuja)xcorrected manda epicycle 80 Subtract half of it from or add that to the mean longitude of the planet, according as the mandakendra is less or greater than 180° . Subtract the result ing longitude from the planet's 3gloc८८: this gives the 3ghrakendra. Calculate the corresponding bhuja, and therefrom the bhujahala by the application of the formula: (1) (2)
- See Parame5vara's commentary . According to the commentator
Sarikaranārāyapa, one should take here the mean longitude as corrected for the longitude and the blujantara corrections, and should apply the ८ra correction when all the other corrections have been performed.
