14 MEAN LONGITUDE OF A PLANET It must be noted that, unless otherwise stated, the mean lunar day and the mean sunrise, etc., correspond to Lanka¹, and that the mean longitude of a planet' means 'the mean longitude for mean sunrise at Lankä'. Sripati gives in addition to the above rule, the following two interes- ting rules also. It may be pointed out that Sripati uses a period of 4,32,00,00,000 years called a kalpa in place of a yuga. Rule 1. Moon's longitude - Sun's longitude + 12 { Sun's longitude = Moon's longitude avamasesa beginning of the current tithi+ civil days in a kalpa -} beginning of the current tithi + Rule 2. Sun's daily motion in degrees) x, tithis beginning of the current tithi) degrees. avamasesa `lunar days in a kalpa Sun's longitude = Moon's longitude 12{₁ 12 tithis elapsed up to the 1 Vide supra, p. 3 (footnote). avamasesa civil days in a kalpa Moon's longitude === Sun's longitude + 12 { beginning of the current tithi) degrees + (Moon's daily motion in degrees- elapsed up to the 12 degrees. {"
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Cf. Sise, ii, 20. (tithis elapsed up to the daily motion in degrees - Sun's daily motion in degrees degrees. (tithis elapsed up to the avamašeṣa junar days in a kalpa X (Moon's Cf. Sise, ii. 24.
