Surya Siddhanta
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कलादि तत् फलम् प्राच्याम् ग्रहेभ्यः परिशोधयेत्। रेखाप्रतीचीसम्स्थाने प्रक्षिपेत् स्युः स्वदेशजा ॥
Subtract the quotient in minutes from the place of the planet (which is found at the mid-night of Lanká, as mentioned in S'loka 53,) if the given place be east of the Middle Line, but if it be west, add the quotient to it, and (you will get) the planet's place at (the mid-night of) the given place.
english translation
kalAdi tat phalam prAcyAm grahebhyaH parizodhayet। rekhApratIcIsamsthAne prakSipet syuH svadezajA ॥
hk transliteration by Sanscriptराक्षसालयदेवौकःशैलयोर् मध्यसूत्रगाः। रोहीतकम् अवन्ती च यथा सन्निहितम् सरः ॥
(The cities named) Rohítaka, Ujjayiní, Kurukshetra &c. are at the line between Lanká and the north pole of the Earth, (this line is called the Middle Line of the Earth.)
english translation
rAkSasAlayadevaukaHzailayor madhyasUtragAH। rohItakam avantI ca yathA sannihitam saraH ॥
hk transliteration by Sanscriptअतीत्योन्मीलनाद् इन्दोः पश्चात् तद्गणितागतात्।(C अतीत्योन्मीलनाद् इन्दोर् दृक्सिद्धिर् गणितागतात्।) यदा भवेत् तदा प्राच्याम् स्वस्थानम् मध्यतो भवेत् ॥
At the given place if the Moon's total darkness (in her eclipse) begins or ends after the instant when it begins or ends at the Middle Line of the Earth, then the given place is east of the Middle Line -
english translation
atItyonmIlanAd indoH pazcAt tadgaNitAgatAt।(C atItyonmIlanAd indor dRksiddhir gaNitAgatAt।) yadA bhavet tadA prAcyAm svasthAnam madhyato bhavet ॥
hk transliteration by Sanscriptअप्राप्य च भवेत् पश्चाद् एवम् वापि निमीलनात्। तयोर् अन्तरनाडीभिर् हन्याद् भूपरिधिम् स्फुटम् ॥
- (but if it begins or ends) before the instant (when it begins or ends at the Middle Line, then) the given place is west of the Middle Line. Find the difference in Ghaṭikás between the times (of the beginnings or ends of the Moon's total darkness at the given place and the mid-night, which difference is called the Des'ántara Ghaṭikás.)
english translation
aprApya ca bhavet pazcAd evam vApi nimIlanAt। tayor antaranADIbhir hanyAd bhUparidhim sphuTam ॥
hk transliteration by Sanscriptषष्ट्या विभज्य लब्धैस् तु योजनैः प्राग् अथापरैः। स्वदेशः परिधौ ज्ञेयः कुर्याद् देशान्तरम् हि तैः ॥
Multiply the rectified circumference of the Earth by this difference and divide the product by 60. The quotient will be the east or west distance (in Yojanas) of the given place from the Middle Line. Apply the minutes, found by this distance, to the places of the planets (as directed before in S'lokas 60 and 61).
english translation
SaSTyA vibhajya labdhais tu yojanaiH prAg athAparaiH। svadezaH paridhau jJeyaH kuryAd dezAntaram hi taiH ॥
hk transliteration by Sanscript