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Surya Siddhanta

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समालिप्तौ भवेताम् तौ ग्रहौ भगणसम्स्थितौ। विवरम् तद्वद् उद्धृत्य दिनादिफलम् इष्यते॥

Thus the two planets, situated in the zodiac, are made to be of equal longitude, to minutes. Divide in like manner the distance in longitude, and a quotient is obtained which is the time, in days, etc.

english translation

कृत्वा दिनक्षपामानम् तथा विक्षेपलिप्तिकाः। नतोन्नतम् साधयित्वा स्वकाल् लग्नवशात् तयोः॥

Having calculated the measure ol'the clay and night, and likewise the latitude (vikshepa), in minutes; having determined the meridian-distance (nata) and altitude (unnata), in time, according to the corresponding orient ecliptic-point (lagna).

english translation

विषुवच्छाययाम्यस् तद्विक्षेपाद् द्वादशोद्धृतात् । फलम् स्वनतनाडीघ्नम् स्वदिनार्धविभाजितम्॥

Multiply the latitude by the equinoctial shadow, and divide by twelve; the quotient multiply by the meridian-distance in nadis, and divide by the corresponding hall-day.

english translation

लब्धम् प्राच्याम् ऋणम् सौम्याद् विक्षेपात् पश्चिमे धनम् । दक्षिणे प्राक्कपाले स्वम् पश्चिमे तु तथा क्षमः॥

The result, when latitude is north, is subtractive in the eastern hemisphere, and additive in the western ; when latitude is soitth, on the other hand, it is additive in the eastern hemisphere, and likewise subtractive in the western.

english translation

सत्रिभग्रहजक्रान्तिभागघ्नाः क्षेपलिप्तिकाः। विकलाः स्वम् ऋणम् क्रान्तिक्षेपयोर् भिन्नतुल्ययोः॥

Multiply the minutes of latitude by the degrees of declination of the position of the planet increased by three signs : the result, in seconds (vikald), is additive or subtractive, according as declination and latitude are of unlike or like direction.

english translation