Khandakhadyaka: An Astronomical Treatise

The Khandakhadyaka Manual. 2

The result from that is half the lagna ascendant lunar day. The half-lagna lunar day, reduced by that result... [The text details specific mathematical coefficients 703 and 876 for adjusting the day count and intercalary months.]

[Explanation of terms:] Shaka Saka era—the Mlechchhas foreigners/barbarians were kings. The time when they were defeated by Vikramaditya is very famous. From that time and year-count, one should subtract the Bhagavasudhara a specific constant of 587. One should know that 587 is to be placed everywhere. The remainder after subtracting 587 is multiplied by 12. Combined with the months that have elapsed since the start of the bright lunar fortnight of Chaitra. One should multiply by 30 and combine with the days elapsed since the first day of the bright fortnight. Such a value is the solar ahargana day count. Placing it below, add 5... The manuscript is faulty at this place.