Surya Siddhanta
Progress:49.8%
अर्कबाहुफलाभ्यस्ता ग्रहभुक्तिर् विभाजिता । भचक्रकलिकाभिस् तु लिप्ताः कर्या ग्रहे +अर्कवत् ॥
Multiply the diurnal motion of a planet by the number of minutes contained in the first equation of the Sun, and divide the product by the number of minutes contained in a circle or 21600′: add or subtract the quotient, in minutes, according as the Sun's equation is additive or subtractive, to or from the place of the planet (which is found from the Ahargaṇa at the mean mid-night at Lanká, the result will be the place of the planet at the true mid-night at Lanká.)
english translation
arkabAhuphalAbhyastA grahabhuktir vibhAjitA । bhacakrakalikAbhis tu liptAH karyA grahe +arkavat ॥
hk transliteration by Sanscriptस्वमन्दभुक्तिसम्शुद्धा मध्यभुक्तिर् निशापतेः।दोर्ज्यान्तरादिकम् कृत्वा भुक्ताव् ऋणधनम् भवेत् ॥
Subtract the diurnal motion of the Apogee of the Moon from her mean diurnal motion; (the remainder will be the Moon's motion from her apogee;) from this remainder find the 1st equation of her motion (by the rule which will be explained further on). This equation is to be subtractive or additive to her mean motion (for finding the true motion of the moon).
english translation
svamandabhuktisamzuddhA madhyabhuktir nizApateH।dorjyAntarAdikam kRtvA bhuktAv RNadhanam bhavet ॥
hk transliteration by Sanscriptग्रहभुक्तेः फलम् कार्यम् ग्रहवन् मन्दकर्मणि । दोर्ज्यान्तरगुणा भुक्तिस् तत्त्वनेत्रोद्धृता पुनः॥ (२२५)
In the manda operation, find the (first) equation of a planet's diurnal motion from the motion itself, in the same way in which the planet's first equation is found. (Take the difference between the gata and gamya sines which have been found in finding the sine of the first Kendra of the planet); by the difference between the sines (gata and gamya) multiply the (planet's mean) motion (from its apogee) and divide the product by 225.
english translation
grahabhukteH phalam kAryam grahavan mandakarmaNi । dorjyAntaraguNA bhuktis tattvanetroddhRtA punaH॥ (225)
hk transliteration by Sanscriptस्वमन्दपरिधिक्षुण्णा भगणाम्शोद्धृता कलाः । कर्क्यादौ तु धनम् तत्र मकरादाव् ऋणम् स्मृतम् ॥
The quotient multiplied by the (rectified) periphery of the first epicycle of the planet and divided by 360° (becomes the first equation of the planet's motion) in minutes. Add this equation (to the mean diurnal motion of the planet) when the first Kendra is greater than 3 signs and less than 9; but when the first Kendra is greater than 9 signs or less than 3, subtract the equation of the motion from it: (thus you have the true diurnal motions of the Sun and Moon, and the manda-sphuṭa motions of the others which are equivalent to their heliocentric motions.)
english translation
svamandaparidhikSuNNA bhagaNAmzoddhRtA kalAH । karkyAdau tu dhanam tatra makarAdAv RNam smRtam ॥
hk transliteration by Sanscriptमन्दस्फुटीकृताम् भुक्तिम् प्रोज्झ्य शीघ्रोच्चभुक्तितः । तच्छेशम् विवरेणाथ हन्यात् त्रिज्यान्त्यकर्णयोः॥
Subtract the manda-sphuta diurnal motion of a (minor) planet from its śíghrochcha's diurnal motion, and multiply the remainder by the difference between the radius[1] and the 2nd hypothenuse found in the 4th operation for finding the 2nd equation.
english translation
mandasphuTIkRtAm bhuktim projjhya zIghroccabhuktitaH । tacchezam vivareNAtha hanyAt trijyAntyakarNayoH॥
hk transliteration by Sanscript