पञ्चसिद्धान्तिका (आचार्य वराहमिहिर - सूर्य, रोमक, पौलिश, वासिष्ठ एवं पितामह सिद्धान्त)

238 PAÑCASIDDHĀNTIKĀ XI.5 (ii) The semi-diameter of the eclipsed body, (here the Moon), is 31′.8 ÷ 2 = 15′.9 = 16 ÷ (3 – 10/15) in digits, = 6.8. According to the scale used, this is represented as, "0.7, radius of eclipsed circle. (iii) For the hour angle of 60°, the tabular versine = 60′, and tabular sine latitude of observer is 21′ 40″. From these, the tabular sine of the angle of deflection caused by lat. = 60′ × 21′ 40″ ÷ 120′ = 10′ 50″. The angle of deflection = 5° 11′, south of the east point, since the hour angle is west. This is angle, EOE′, and E′ – W′ is the equatorial east-west. (iv) Longitude of Moon + rā. 3-0-0 = rā. 7-0-0. The declination of this point is 11° 44′, south, which is the southward defection from E′, represented as angle E′