पृष्ठम्:स्फुटचन्द्राप्तिः.djvu/३६

(Correction for Terrestrial L0ngitude) 25. Then again, the corrective (viradik८s), on account of the place (in question) being situated to the east or west of the central (Ujjain) meridian, (has to be calculated). Its measure (for the place) is to be known from the traditional knowledge of the learned 26. Therefore, when the correction in minutes to the Mean Moon (for the place, as got by tradition) has been found to be additive or subtractive, the minutes are to be multiplied by 255 (Siऽira) and divided by 56 (ta710) and applied inversely as viradikas. (Correction for Declinational Ascensi0mal Difference) 27. The True Sun is them computed and the precession added Its R Sime in the Sine Table (below) beginning with 153 (gu70dya10) is then noted in order to compute the Declinational Difference (Card-dala) (1-4) (5-8) (9-12) (13-16) (17-20) (21-24) Gurval:Staraऽ (2|5 second) 153 756 1329 1840 2245 2493 305 903 1464 1953 2323 2525 457 1048 1595 2059 2391 2544 607 1190 1721 37 2156 2448 2551 1. Rationale : The sum rises at the rate of 10 wind(likतs earlier or later. as the place is 1० east or west of the standard meridian and this is additive or subtractive, respectively. to get the true [0];ru१७८k८l८. Expert astronomers find this time by various means, and usually express it in terms of correction to the Mean Moon, which, obviously, is negative for the east, and positive for the west . This is transmitted through tradition to succeeding astronomers This can be re-converted into windika s by multiplying the Moon's correction by 25 and dividing by 56. since the mean motion in 255 witadikas is 56 Since the correction-viradikals and the Moon's correct1०n are opposite in sign, the sign is asked to be reversed.