Surya Siddhanta
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वलनाग्रान् नयेन् मध्यम् सूत्रम् यद्य् अत्र सम्स्पृशेत् । तत्समासे ततो देयौ विक्षेपौ ग्रासमौक्षिकौ॥
From the extremity of either deflection draw a line to the centre : from the point where that cuts the aggregate-crrcle (samdsa) are to be laid off the latitudes of contact and of separation.
english translation
valanAgrAn nayen madhyam sUtram yady atra samspRzet । tatsamAse tato deyau vikSepau grAsamaukSikau॥
hk transliteration by Sanscriptविक्षेपाग्रात् पुनः सूत्रम् मध्यबिन्दुम् प्रवेशयेत् । तद्ग्राह्यबिन्दुसम्स्पर्शाद् ग्रासमोक्षौ विनिर्दिशेत्॥
From the extremity of the latitude, again, draw a line to the central point : where that, in eithercase, touches the eclipsed body, there point out the contact and separation.
english translation
vikSepAgrAt punaH sUtram madhyabindum pravezayet । tadgrAhyabindusamsparzAd grAsamokSau vinirdizet॥
hk transliteration by Sanscriptनित्यशो +अर्कस्य विक्षेपाः परिलेखे यथादिशम् । विपरीताः शशाङ्कस्य तद्वशाद् अथ मध्यमम्॥
Always, in a solar eclipse, the latitudes are to be drawn in the figure (parilekha) in their proper direction; in a lunar eclipse, in the opposite direction. In accordance with this, then, for the middle of the eclipse,
english translation
nityazo +arkasya vikSepAH parilekhe yathAdizam । viparItAH zazAGkasya tadvazAd atha madhyamam॥
hk transliteration by Sanscriptवलनम् प्राङ्मुखम् देयम् तद्विक्षेपैकता यदि । भेदे पश्चान् मुखम् देयम् इन्दोर् भानोर् विपर्ययात्॥
The deflection is to be laid off—eastward, when it and the latitude are of the same direction; when they are of different directions, it is to be laid off westward : this is for a lunar eclipse; in a solar, the contrary is the case.
english translation
valanam prAGmukham deyam tadvikSepaikatA yadi । bhede pazcAn mukham deyam indor bhAnor viparyayAt॥
hk transliteration by Sanscriptवलनाग्रात् पुनः सूत्रम् मध्यबिन्दुम् प्रवेशयेत् । मध्यसूत्रेण विक्षेपम् वलनाभिमुखम् नयेत् ॥
From the end of the deflection, again, draw a line to the central point, and upon this line of the middle lay off the latitude, in the direction of the deflection.
english translation
valanAgrAt punaH sUtram madhyabindum pravezayet । madhyasUtreNa vikSepam valanAbhimukham nayet ॥
hk transliteration by Sanscript