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

III.29 III. PAULIŚA-SIDDHĀNTA 69 with the expression, "Salutation to the Ketus." From the singular in the mantra of their invocation, Ketum kṛṇvannaketave, one may think that Ketu is referred to in the singular also. It is not so. Here the word does not mean the 'Comet' Ketu at all. The mantra itself is in praise of the Sun and Ketu here means the activity caused by the Sun in the sleeping inactive world. How then is this mantra used to invoke the Ketus? The utterance of the word Ketu here is sufficient, as the utterance of the many śa sounds in the Mantra śaṃ no devīḥ etc. (Ṛgveda 10.9.4) is sufficient to propitiate Śanaiścara. though the mantra itself refers to the water-deities, or the utterance of the word mayūra in the mantra, āmandravir intra haribhiḥ etc. (Ṛgveda 3.45.1) is sufficient to propitiate Subrahmaṇya, though the mantra refers to Indra, as also words like, Om, atha kalyāṇa etc. cause auspiciousness by their mere utterance. So, according to the Śāstras, Ketu refers only to the Dhūmaketus, and Rāhu is both the nodes, the recent application of the term Ketu to the descending node being un- warranted. Therefore, when the Dharmaśāstras enjoin the eclipses caused by Rāhu as sacred periods, they take in both the ascending and the descending nodes, and the suggestion by some that they do not take in the descending node on the score of some un-informed people calling it Ketu is wrong because what they call Ketu is really Rāhu. [चन्द्रविक्षेपः] वक्त्रादधिकश्चन्द्रो हीनः पुच्छाच्च याति भगणोदक् । हीनो वदने पुच्छेऽधिकेऽ(सु) राधाति दक्षिणतः ॥ ३० ॥ भागनवत्या राहोश्चन्द्रोऽन्तरितोऽतिमहति विक्षेपे । लिप्ताशतद्वये [ना] त्यशी(त्याऽ)नुपातोऽतोऽन्यत्र ॥ ३१ ॥ Moon's latitude 30. If the Moon lies between the Head and the Tail it is north of the ecliptic, (i.e. its latitude is north). If it lies between the Tail and the Head it is south of the ecliptic, (i.e., latitude is south). 31. The latitude is a maximum equal to 280 minutes when the Moon is 90 degrees distant from either Head or Tail. The latitude is to be found by pro- portion, at other places, using the distance in degrees from Head or Tail, whichever is nearer. Example 14. The true Moon is rā. 2-7-0. Rāhu's Head is rā. 5-3-0. Find the latitude of the Moon. The Tail is Head + rā. 6-0-0- = rā. 11-3-0. The Moon is between Tail and Head. Therefore the latitude is south. The distance of the Moon from the nearer limb, Head is rā. 5-3-0 − rā. 2-7-0 = rā. 2-26-0 − 86 degrees. For 90° the latitude is 280'. For 86° latitude is 86° × 280' ÷ 90° = 267½', South, as seen. 30a. B. चक्रादधिक b. A.B1.पृच्छाच्च. B.°पोदृक् c. A1.B1.पुंछे; C.वदनात् पुच्छाधिको d. A.B.°धिकोमुराघाति; C.°धिकोऽसुराद्याति; D.धिकोऽमकाद्याति 31b. B.°तोभिमहति c-d. A. येत्यशीतिमनुपातोन्पत्र ।; B. द्वयेत्यशीतमनुपातोन्पत्र ।; C. द्वयाधिकसप्ततिरनुपाततोन्पत्र ।; D. द्वय[मे] त्यशीतिमनपातोतोन्पत्र ।