पृष्ठम्:लघुभास्करीयम्.djvu/१९

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एतत् पृष्ठम् अपरिष्कृतम् अस्ति


INTRODUCTION 1X Verse 1 pays homage to the Sun and Verse 2 to Myabhata I. vZ 3 ' an appreciation of Aryabhata I and h, S work. Ya -Ja method for determining the number of days yCarS ' u n »™ rule for calculating the mean Verses 15-17 give the general rule loneitudes of the planets, etc Vers 18-22 state the positions of the apogees of the p.anets and ,he dimensions of the epicycles of the planets. Verse 23 specifies the position of the Hindu pome mendta. Verses 24-29 are devoted to the determination of the long.tude of a place. Verse 30 gives the criterion for knowing whether the local place is to the east or to the west of the prime meridian. Verses 31-36 relate to the longitude correction to the mean longi- tudes of the planets and its justification and importance. Verse 37 differentiates between the longitude-correction and the fcwnfowfl-correction. A detailed treatment of the longitude-correction is a remarkable feature of this chapter. As many as fourteen verses are devoted to this topic only. The second chapter contains 41 verses and is devoted to the calculation of the true longitudes of the planets. Verses 1-20 relate to the determination of the Sun's true longi- tude. Of these, verses 1-4 deal with the Sun's equation of the centre, and the Sun's correction for the equation of time due to the eccentricity of the ecliptic; verse 5 gives approximate formulae for the latter correction m the case