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Hayanaratna · by Balabhadra
Chapter 8 · Month Chart and Monthly Results
मासप्रवेशादिविचाराध्यायः
भुजांशमिति कोष्ठस्थम्फलमंशादिकं रवेः॥कोष्ठान्तरहताच्छेषात् षष्टिलब्धकलादियुक्॥
The Sun's result, beginning with degrees, that stands in the cell matching the arc's degrees, is taken. The remainder is multiplied by the difference between the cells. Divided by sixty, it gives minutes and so on. That is added.
Simple meaning: Manda equation from the table: take the cell for the arc's whole degrees, then add the remainder times the cell difference divided by 60.
स्पष्टं मंदफलं केंद्रे तुलाजाद्ये ऋणन्धनम्॥
True manda result: minus in the Libra half, plus in the Aries half. Applied to the mean Sun it gives the true Sun.
स्वर्णं कर्कमृगे केन्द्रे मध्यभुक्तौ स्फुटा गतिः ॥
True daily motion: add the cell result in the Cancer half, take it away in the Capricorn half. Then the true Sun at the year lord's time has its…
अथ त्रैक्यानयनम्॥
Finding the traikya: double the tropical mean Sun, take the sine of its arc and divide by shadbha. Add or subtract by the quadrant.