204 RISING, SETTING AND CONJUNCTION OF PLANETS The obvious proportion is: When the radius (i.e., 3438') corresponds to the planet's mean distance in yojanas, what will the divisor (i.e., the true distance of the planet in minutes) correspond to ? The result is the true distance of the planet in terms of yojanas. A rule relating to the determination of the true values of the diameters of the planets in minutes : 58 (ii). So also become the minutes of the diameters when divided by the "divisor" and multiplied by the radius.¹ The remaining processes concerning the occultation of one planet by another: 59-60. The determination of the ten Rsines (viz. madhyajyā, drkksepajya, drggatijyā, drgjyā and udayajya-five for each of the two planets concerned) and other remaining determinations should be made as in the case of the Moon. The Rsine of the altitude (for each planet) is to be calculated from the (planet's) own ascensional difference, etc., as taught in connection with the Moon's rising. In the case of conjunction of the planets (i.e., occul- tation of one planet by another), the lambana and nati are prescribed to be found out (by proportion) from the (planets') own "dividing numbers". The remaining processes such as the calculation of the sthityardha (i.e., the semi-duration of occultation) are the same as in the case of a (solar) eclipse. Concluding stanzas : 61-62. The predictions of those (astronomers) whose minds are purified by day to day practice and who have acquir- ed by the grace of the teacher the eye of true conception of the astronomical science, (always) agree with the planetary phenomena and do not go astray as the pure thoughts (desires) of a lovely and devoted wife (do not go astray). 1 The same rule occurs in SiDVE, I, x. 4.
