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

178 PAÑCASIDDHĀNTIKĀ VII.6 added to Tail if Moon is between 0 and 6 rāśis. For Moon between 6 rāśis and 12 rāśis ☊ is negative and p.lat. is negative, and therefore the result is to be added to Head and subtracted from Tail. Thus, by making the three corrections to Rāhu, p.lat. is secured, though approximately. TS have not translated or explained these three verses, not having understood the exact form of the rules or their derivation. They merely surmise that it is some work done on Rāhu to correct the latitude for parallax. NP too have not understood these verses correctly for they say in the notes to verse 2. “This verse is corrupt” etc., in the notes to verse 3, “The text as it stands seems to have con- fused the different cases” and in the notes to verse 4, “The text seems to instruct us” etc. (pt. II, p.57). In accordance with the correct form of the rules, we have in verse 2, emended dvika into dhṛti, rāśicaraṇāyana into sarāśicaraṇāpama and candrāyana into candrāpama. [ग्रहणकर्म] राहोः स'षट्कृति'कलां हि(त्वांशां) त(च्छ)शाङ्कविवरांशैः । ग्रहणं त्रयोदशान्तः शशिनो भानोस्तथाष्टान्तः ॥ ५ ॥ तद्वर्गं(मपास्ये)न्दो'(र्न)र्तुरूपात्' ('श्रुतिरस्सा'च्च) । तन्मूलं पादोनं स्थितिकालश्चन्द्रभान्वोश्च ॥ ६ ॥ Eclipse computation 5. Deduct 1° 36′ from Rāhu and find Moon ~ Rāhu, in the case of the lunar eclipse. Deduct 1° 36′ from Rāhu corrected (by verses 2-4) and find Moon ~ Rāhu, in the case of the solar eclipse. If the difference is less than 13° there is a lunar eclipse. If the difference is less than 8°, there is a solar eclipse, (other- wise not). 6. For the lunar eclipse, deduct the square of the difference from 169, find its square root and take three fourths of it. This is the total duration in nāḍis. For the solar eclipse, deduct the square of the difference from 64, find its square root, and take three fourths of it. This is the total duration in nāḍis. Thus, nāḍis of total duration = ¾ √(169 – (Moon ~ Rāhu)²), or ¾ √(64 – (Moon ~ Rāhu)², respectively. Half this subtracted or added to the full moon, or parallax corrected new moon, gives the times of first and last contacts. 5a. A. किलां; B. कला b. A1. हित्वा सं; A2. हिन्चा सं; B. हिच स. A.B1.2. तछ (B. सश्रुत) । d. B. तथाष्टींतः C.D. रूपाद्रवेः श्रुति (D. कृत) रसाच्च 6a. AB.1.2 समासेन्दो c. A. पादोन b. A.B. न वर्तृ (B. चर्त्तु) रूपात्रेचेष्टरसाश्च d. A.B. भानोश्च