10 MEAN LONGITUDE OF A PLANET and divide the remainder (called adhimāsaseṣa, i.e., the residue of the intercalary months) by the number of lunar months (in a yuga): thus are obtained degrees, minutes, seconds, and thirds. Then multiply the (complete) intercalary months elapsed by 30 and to the product add the number of solar days (elapsed since the beginning of Kaliyuga); then multiply that (sum) by the number of omitted lunar days in a yuga and divide by the number of lunar days (in a yuga): the remainder obtained is (the avamašeşa, i.e., the residue of the omitted lunar days) called ähnika. Then multiply the avamasesa by the number of inter- calary months (in a yuga) and divide by the number of civil days (in a yuga). Add the resulting quotient to the adhimāsaseṣa and then apply the process stated above (i.e., divide by the number of lunar months in a yuga: the result is in degrees, minutes, etc. This is the total adhimasasesa). Next multiply. the avamasesa called ähnika by 60 and divide by the number of civil days in a yuga: the result is in minutes, seconds, and thirds respectively. The number of months elapsed (since the beginning of Caitra) are to be taken as signs, and the number of lunar days elapsed (of the current month) as degrees. (The sum of these signs and degrees and the minutes, seconds, etc. correspondi to the avamasesa is the grahatanu). From thirteen times and from one time that (grahatanu) severally subtract the degrees, minutes, etc. corresponding to the (total) adhimasašeşa: the remainders (thus obtained) are stated by the wise astronomers to be the mean longitudes of the Moon and and Sun (respectively) conforming to the teachings of (Ārya)bhaṭa.¹ The process described in the above rule is not in proper sequence. The direction given in verse 15 ought to have been after verse 17. Stated in proper sequence, the rule would be: ¹ This rule occurs also in BrSpSi, xiii. 20-22; KK (Sengupta), i. 11-12; and Sife, ii. 21-22. For similar rules, see SiDV, I, i. 27, 25-26; and SiSi, I, i (c). 6-7,
