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Hayanaratna · by Balabhadra
Chapter 1 · Planets, Signs, Year Entry
ग्रहराशिस्वरूपवर्षप्रवेशाद्यानयनाधिकारः
अथ स्पष्टलग्नानयनं । तत्र स्पष्टलग्नानयनोपयुक्तं स्वोदयसाधनं ब्रह्मतुल्ये ॥लंकोदया नागतुरंगदस्रा गोंकाश्विनो रामरदा विनाड्याः॥क्रमात्क्रमस्था २७८। २९९ । ३२३। ३२३। २९९। २७८ श्चरखण्डकैः स्वैः क्रमात् क्रमस्थैश्च विहीनयुक्ताः ॥मेषादिषण्णामुदयाः स्वदेशे तुलादितोमी च विलोमसंस्थाः ॥
Now finding the true lagna (rising sign). First, finding the local rising times used for it, from the Brahmatulya. The Lanka risings, in vinadis (24-second units), are 278, 299 and 323. They are set out in order: 278, 299, 323, 323, 299, 278. Take away their own charakhandas (steps of the day-length change), set in order, and then add them. These are the risings of the six signs from Aries at one's own place. And from Libra, these same run in reverse order.
Simple meaning: Local rising times: start from the fixed equator times 278, 299, 323 palas, then take away or add the day-length steps.
अथलग्नसाधनम् ॥
Finding the rising sign: take away the Sun's remaining time in its sign, then the rising times of the next signs.
त्रिंशन्निघ्नमशुद्धाप्तभागाद्यं मेषपूर्वकैः ॥
Rising sign degrees: remainder x 30, divided by the rising time of the next sign. Add to the signs passed, then remove the zodiac shift.
भोग्याल्पकालात्स्वत्रिघ्नात्स्वोदयाप्तलवादियुक् ॥
Rising sign when the wanted time is shorter than the Sun's remaining time: add a small part to the Sun itself. At night, start from the Sun plus six…