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Hayanaratna · by Balabhadra
Chapter 8 · Month Chart and Monthly Results
मासप्रवेशादिविचाराध्यायः
अंत्यास्त्रिहृत्स्युश्चरखण्डकानि क्रमेण सूर्योदयनांशयुक्तात् ॥भुजर्क्षसंख्यामितयातखण्डयुतिस्वभोग्याहतशेषकस्य ॥ ४ ॥
The last is divided by three. These, in order, are the charakhanda (steps of the day-length change). Take the Sun joined with the 'udayanamsha'. Add the gone parts, as many as the signs of its arc. Then take the remainder multiplied by its own to-come part ...
Simple meaning: Steps of the day-length change: the third product is divided by 3. Then add the gone steps for the arc's signs, and the remainder times the next step.
खरामभागेन युतश्चरार्द्धश्चरार्द्धतुल्या विकला रवेस्तु ॥
Day-length correction: the sum found is the half day-length difference. The same number in seconds is the Sun's correction, plus in the Libra half…
त्रयाणां वीर्य्यमार्गेण योगस्त्रैक्य उदाहृतः ॥
The traikya is the total of the three corrections; an easy method follows.
सायनस्फुटसूर्य्यस्य भुक्तांशास्स्वोदयैर्हताः ॥
Easy traikya: the Sun's gone degrees times the rising time of its sign, divided by 30, plus the rising times of the signs from Aries before it.