पृष्ठम्:महाभास्करीयम्.djvu/१५५

70 Sign 1 Aries 2 Taurus 3 Gemini 4 Cancer 5 Leo 6 Virgo DIRECTION, PLACE AND TIME Times of Rising of the Signs at the Local Place Time of rising at the local place, in asus 1670 - a 1795 b 1935-c 1935 + c 1795 + b 1670 + a Sign 12 Pisces 11 Aquarius 10 Capricorn 9 Sagittarius 8 Scorpio 7 Libra A rule for the determination of the meridian zenith distance. and meridian altitude of the Sun with the help of the Sun's declination and the latitude of the place : 11. The difference or the sum of the Sun's declination and the latitude (of the place) according as the Sun is in the six signs beginning with Aries or in the six signs beginning with Libra is the Sun's meridian zenith distance (i.e., the zenith distance of the idday Sun).¹ 90 degrees (literally, a quadrant of a circle) minus the degrees of the (Sun's) meridian zenith distance is the (Sun's) meridian altitude.² The Rsine of the degrees of the Sun's meridian zenith distance is the great shadow; and the other (i.e., the Rsine of the Sun's meridian altitude) is the great gnomon. An alternative rule for finding the Sun's meridian altitude : 12. Or, take the Sum or difference of the earthsine and the day-radius according as the Sun is in the northern or southern ¹ This rule is found also in BrSpSi, iii. 47; LBh, iii. 27; ŚiDVṛ, I, iii. 16; SiSe, iv. 42(i). 2 This rule is found also in Br.Sp.Si, iii. 47(ii); SiŚe, iv. 42(ii).