Hayanaratna · by Balabhadra
Chapter 8 · Month Chart and Monthly Results
मासप्रवेशादिविचाराध्यायः
प्रतिवर्षं स एवार्कस्स्फुटस्सगतिको भवेत् ॥एकैकराशिसहितो वर्षार्कमासकालजः ॥१२॥
Every year that same Sun, with its motion, is the exact Sun. The Sun born at a month's time is the year's Sun with one sign added each time.
Simple meaning: The year Sun is the exact Sun. A month's Sun is the year Sun plus one sign for each month.
स्फुटार्काः स्युर्द्वितीयादिमासेष्वर्कास्तु मासजाः ॥
From the second month, each month's Sun is the exact Sun. For days, add one degree a day.
अथ स्वाभीष्टमासस्य संख्यारूपविवर्जिता ॥
For the month's Sun: take the chosen month number less one and add the table result for it.
जन्मार्को मध्यमोभीष्टमासपार्श्वे भवेद्रविः ॥
The mean Sun near the chosen month is found from the birth Sun. The month number less one, times 30, is added.