सिद्धान्तशिरोमणि: गणिताध्याय (भास्कराचार्य - ग्रहगणित, मध्यमाधिकार व स्पष्टाधिकार सटीक)

34 12 to give in degrees the increase of Moon's longitude from the ending moment of the tithi on the previous day. Thus this increase is R/C × 12 ; but C = 1577916450000 ∴ R/C × 12 = R / (1577916450000 / 12) = R / 131490000000 approximately. Thus this increase is to be added to (x + 12 y)° where x° is the longitude of the Sun and y the integral part of the elapsed tithis so that the Moon's longitude is (x + 12 y)° + R° / 131490000000˙ Verses 6, 7. Computation of the positions of the Sun and the Moon from the Adhimāsa-Sesha and Avama-Sesha. The Avama-Sesha divided by 27110000000 is termed an additive constant in minutes of arc to the Sun’s position ; the same Avama-Sesha multiplied by 13 and divided by 35 is termed such an additive constant to the position of the Moon ; Construe that the Sun's position is given by as many degrees as there are elapsed tithis after the beginning of Chaitra and that the Moon's position is given by Thir- teen times the same. Let these positions of the Sun and the Moon be diminished by a number of degrees equal to what is obtained by dividing the Adhimāsa-Sesha by the number of lunations in a Kalpa. Then add the respective additive constants to the positions of the Sun and the Moon so obtained. The results will be the positions of the Mean Sun and the Mean Moon. Comm. Here the data are the Adhimāsa-Sesha and the Avama-Sesha and nothing else and the problem set is to find the Mean positions of the Sun and Moon. The Adhimāsa-Sesha is of the form (R' × 30) / S where R' is the remainder obtained while finding the elapsed Adhimāsas