Page:English translation of the Surya Siddhanta and the Siddhanta Siromani by Sastri, 1861.djvu/33

 the argument of latitude of a planet); multiply it by the (greatest) latitude of the planet (mentioned in 70th of 1st Chapter) and divide the product by the 2nd hypothenuse found in the 4th operation; but in respect of the Moon divide it by the radius: the quotient will be the latitude (of the planet).

. The (mean) declination (of a planet or the declination found by computation from its corresponding point in the ecliptic) increased or diminished by its latitude, according as they are both of the same or different denominations, becomes the true (declination of the planet). But the Sun's (true declination) is (the same as) his mean declination.

. Multiply the diurnal motion (in minutes) of a planet by the number of which the sign, in which the planet is, takes in its rising (at a given place;) divide the product by 1800′ (the number of minutes which each sign of the ecliptic contains in itself,) add the quotient, in, to the number of the contained in a (sidereal) day; the sum will be the number of contained in the day and night of that planet (at the given place).

. Find the right and versed sines of the declination (of a planet): take the versed sine (just found) from the radius, the remainder will be the radius of the diumal circle south or north of the equinoctial. (This radius is called ).

. Multiply the sine of declination (above found) by the length (in digits) of the equinoctial shadow, divide the product by 12, the quotient is the : The multiplied by the radius