पञ्चसिद्धान्तिका (आचार्य वराहमिहिर - सूर्य, रोमक, पौलिश, वासिष्ठ एवं पितामह सिद्धान्त)

270 PAÑCASIDDHĀNTIKĀ XIV.18
(सूत्रेण) बिन्दुत्रयसंस्पर्शसमेन मण्डलं यत् स्यात् ।
तेन तदह्निच्छाया शङ्कोर्गच्छत्यमुञ्चन्ती ॥ १५ ॥
तन्मण्डलमध्यं यच्छङ्कुतश्च दक्षिणोत्तरं भवति ।
तच्छङ्कुविवरमुदगास्थितं च माध्यन्दिनी छाया ॥ १६ ॥
Cardinal directions (by means of three shadows of a gnomon)
14-16. Mark three times (at intervals) the tip of the shadow of a gnomon set
up at the centre of the circle (drawn on level ground). With the help of those
(three points) construct two fishes. Taking the point of intersection of the two
strings passing through the head and tail of those fishes as centre and a thread
so long as to touch the three points as radius, construct a circle (passing
through the three points). The tip of the shadow of the gnomon that day
moves on that circle without swerving from it.
16. The centre of that circle lies to the north or south of the gnomon. Bet-
ween that and the gnomon is the midday shadow lying to the north (or south)
of the gnomon.
The midday shadow falls towards the north or south according as the Sun’s northern declination
δ is less or greater than the latitude ϕ of the place. When the Sun’s declination is south, the shadow
always falls towards the north.
[खगोलः]
हरिजमिति गगनमवनौ प्रसक्तमिव यत् प्रदृश्यतेऽन्तेषु ।
सममिति पूर्वापरतो ह्येवमेव दक्षिणोत्तरतः ॥ १७ ॥
ध्रुवहरिजविवरमक्षोऽक्षनवतिविवरं च लम्बकोऽभिहितः ।
(लम्बो) नमति ख (मध्याद्) द्युव्यासोऽस्तोदयाख्यस्य ॥ १८ ॥
The Celestial Sphere
17. (The circle) where the sky appears to meet the earth at their skirts is called
the horizon (harija). The (vertical) circle which runs from east to west is called
14a. A.B. नाभ्यासंन छा (B2. च्छा) याग्रं
(A. ०छाद्या) ; D. नाभ्यासन्नच्छायाग्र० D. तदाह्नि छाया; B. तदद्धि छाया
b. B1. ०ग्रंनकये (B2. न कपे-त्रिसुतो) 16a. A. मध्या; B. मध्यात्; D. मध्याधश्छङ्कु;
c. B. मत्स्यव - निसृतसूत्रं द्वय b. A. छंकुः श्व B3. छड़क. B. दक्षिणोत्तरे
d. A.B.C.D. तुल्येन c. A. तछंकु; B. तछजषविवर
15a. A. सूर्येण; B. स्तार्येण d. B. ०गास्थितश्च
c. B1. तिन for तेन