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पृष्ठम्:Surya siddhanta (with commentary).pdf/३०१

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S%rgu-Siddhanta observation explained by the connmentators - almost impracticable, and i® &an, accordingly, hardly be that by which the positions of the asterisms were at first laid down, or by which they could be made to undergo the necessary corrections, Another method, more in accordance with the rules ond processes of the third chapter, and which appears to us to be more authentic end ot higher value, is described by Golabrooke (bs &boye) from the Siddhanta-Sarvabhfunma, being there cited from the siddhanta-Sundars, xt is as follows: A tube. adopted to the unnnit of the gronon, directed toward tble str on the noridian and the iue of tlho hube, pointed to the star, is prolonged by a throted to late groura. The ite from the summit of the gnormon to the base is blhe hypotheruse; the height of the glomon is the perpendiculkar und its distance from the extremity of the thread is the best of the triangle. Therefore, as the hypothenuse is to its base, so is the radiuB to a base, from which the King of the algle, and conRequently bhe angle itself, are known !f it °xceed the latitude [of the place of observation], the declituation j« »outed; or, if the contrary, it is north. 'The right bgcension of the ste is calculated from the hour of night, and from ble right ascersion of the gun how that time The leclination of the works sponding point of the elptic being found, the surn or difference of %he decinations, according us they are of the sure I a different denominations is the distance of the star from the ecliptic. The longitude of the same point is computed; and from these elements, with the actual precessium of the bquimox, may be calculated the true longitude of the Blbar : !8 alse its latitude (or a circle ussing through the poles of the ecliptic. The Sia&h$nf२-Kavubhamu also givof the true longitudes and lati- tutes of the asteristms, peofessoly as tions obtainel by observation and calculation, and they are reporte by elebroke in his general bable of data xpecting the asterian [f we are not pistolkern, he amount and character of the strors in the $ated latifules of the १४tering tend to prove that his, or some kindred pocES, was that by a ich their position५ were actually determined. } 1a In 'Taunux, the seventeenth degree, a planet of which the latitude is { a little more than two degreek, south, will #pit the "ain of Roimi The asterism Rohini. |s hns been seen above is composed of the five |principal strB in the hend ot 'fauruR, in the constellation of which is seen the figure of a win 'The divinity is Prajapat The distances of its state in longitude fom the initial point of he sphere vary from 45° 468 () to 40° 46' (०) : hence the boyenteenth degree of the second sign—the reckosing commencing at the initial poirt of the sphere, takon as coinciding also with the vermal equinox -is very nearly the middle of the wain, The latitude of