शकुनिर्नागाश्च चतुष्पद किंस्तुघ्नमेव च
Shakuni, Naga, Chatushpada, and Kimstughna likewise.
तत्र शकाङ्गुलैरिष्टैः सममण्डलमालिखेत्
There, with the desired finger units, one should mark the circle equally.
तच्छायाग्रं स्पृशेद्यत्र दत्तं पूर्वापराह्नयोः
Where the tip of the shadow touches, that is given for the forenoon and afternoon.
तन्मध्ये तिमिना रेखा कर्तव्या दक्षिणोत्तत
In the middle, a line should be drawn with a thread, from south to north.
दिग्मध्यमत्स्यैः संसाध्या विदिशस्तद्वदेव हि
The intermediate directions are determined by the fish in the middle of the directions, similarly for the sub-directions.
भुजसूत्राङ्गुलैस्तत्र दत्तैरिष्टप्रभा मता
There, with the given arm-string finger units, the desired radiance is considered.
भमण्डलं च विषुवन्मण्डलं परिकीर्तितम्
The circle of the shadow and the equinoctial circle are thus described.
इष्टच्छायाविषुवतोर्मध्येह्यग्राभिधीयते
Between the desired shadow and the equinoctial, the tip is named.
प्रोह्य शङ्कुकृते मूलं छाया शेकुविपर्ययात्
When the base is set up in the form of a gnomon, the shadow is measured in reverse order.
तद्गुणाद्भदिनैर्भक्त्या द्युगणाद्यदवाप्यते
From its qualities, by the proper method, and with devotion, the result is obtained according to the number of days.
तत्संस्वकृताद्धहात्कान्तिच्छायावरदलादिकम्
From the contact with that, the brightness, shadow, and the opening of petals and so on are produced.
लंबाक्षज्ये तयोश्छाये लंबाक्षौ दक्षिमौ सदा
The vertical and horizontal chords of their shadows are always the southern vertical and horizontal chords.
शेषह्यानांशाः सूर्यस्य तद्वाहुज्याथ कोटिजाः
The remaining segments of the sun are the chords of its rays or the segments at the tip.
कोटीज्ययाविभज्याप्ते छायाकर्माबहिर्द्दले
By dividing with the chord at the tip, the shadow calculation is performed on the outer segment.
दिग्भेदोपक्रमः शेषस्तस्य ज्या त्रिज्यया हता
The remainder is the commencement of the division of directions; its chord is multiplied by the triple chord.
कर्कादौ प्रोह्यचक्रार्द्धात्तुलादौ भार्द्धसंयुतात्त
At the beginning of Cancer, subtract from half the circle; at the beginning of Libra, add to half the circle.
तन्मन्दमसकृद्धामंफलं मध्यो दिवाकरः
The result of the sun's mean position is obtained by repeatedly applying the slow and fast motions.
चक्रासवो लब्धयुती स्व्रहोरात्रासवः स्मृताः
The sum of the circle's motion and the obtained values is called the daily and nightly motion.
क्रमादेकद्वित्रिभघाज्या तच्चापानि पृथक् पृथक्
In order, the chords are divided by one, two, and three; those are the bows, each separately.
स्वागाष्टयोर्थगोगैकाः शरत्र्येकं हिमांशवः
For the eight divisions of their own, the sun, moon, and others are one each for autumn, three for winter.
व्यस्ताव्यस्तैर्युतास्तैस्तैः कर्कटाद्यास्ततस्तु यः
Combined with those, both separately and together, are the signs beginning with Cancer and so on.
गतभोग्यासवः कार्याः सायनाःस्वेष्टभास्कराः
The portions to be enjoyed are to be calculated; the evening ones are with the desired positions of the sun.
अभिष्टधटिकासुभ्यो भोग्यासून्प्रविशोधयेत्
From the desired daṇḍikā and subhā, one should subtract the enjoyed portions.
शेषं त्रिंशत्क्रमाद्ध्यस्तमशुद्धेन विभाजितम्
The remainder, increased by thirty in order, is divided by the incorrect value.
प्राक्पश्चान्नतनाडीभ्यस्तद्वल्लङ्कोदयासुभिः
From the eastern and western nadīs, similarly, with the rising and setting portions.
भोग्यासूनूनकस्याथ भुक्तासूनधिकस्य च
Of the portion to be enjoyed, if less, or of the enjoyed portion, if more.
विराह्वर्कभुजांशाश्चेदिन्द्राल्पाः स्याद् ग्रहो विधोः
If the portion of the Sun's rays is less than that of Indra, then the eclipse belongs to the Moon.
अर्कं विधुर्विधुं भूभा छादयत्यथा छन्नकम्
Just as a covering obscures the Sun, the Moon, or the Earth, so too does the eclipse conceal them.
तत्स्वच्छन्नं च मानैक्यार्द्धांशषष्टं दशाहतम्
That which is covered, and its own covering, are measured by half, one-sixth, and ten times the portion.
स्थित्यर्द्धं घटिकादिस्याद्व्यङ्गबाह्वंशसंमितैः
Half of the duration of stability is determined by the measure of the portion of the limbs and arms.