पृष्ठम्:स्फुटचन्द्राप्तिः.djvu/४०

(Am10ther meth0d for True M100n at any time during the interwal) 37. (Another method to derive the True Moon at any desired time is now stated. If the desired time is ) later ( than the Yakyakdla mearest to it), some add 221 (:01/hora) to the Walkyasaiोklya and (if the desired time is) earlier, subtract from it 220 (1ist/hura) (Or perform the operation with 27 (ऽ॥klla) and 28 (dulkha), applied 38. Multiply the diffcrence, i.e., the rate of the daily motion of the Valkya got, by the desired time , in 1तdika.s, and divide the product by 60 (16ti). The result should be added to the Moon's longitude (of the relevant !/akyalk८l() if (the desired time) is later and subtractad if earlier 41 (True Sun at desired time) 39. In the case of the Sun, too, (its True position at any desired time) can be computed using its True Motion. Computation of the True Sun can be done also by finding the Mean Sun (at the time) using its Mean Motion 40. R (Cosine of the Mean Surn-71i115-Higher Apsis is to be divided by 1550 (1710:50]'t) and the result applied to the Sun's Mean Motion, positively (when it is) in the six signs beginning with Cancer (Karki) and negatively in the six signs beginning with Capricorm (Wokra). The True (Daily) Motion of the Sun is got 1. Ratio१८le : Subtraction of 27 from above or addition below gives the mid-wtly0, whose rate is taken as the average for Spbuta-6 of 28 from the interval of 221 is the same as subtraction of 27, and subtraction of 220 is the same adding: 28, the total being 248. Either can be chosen according to convenience. as 2. Rati01१८le : Since the Sun's eu:ation of Centre is proportional to the Sun's Sin M८१nd(a-१८१droः, the variation in it causing true daily motion is proportionate to the Cosine , and, therefo४०, 2ero at 90° and 270° of K८१dr८ः