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

314 PAÑCASIDDHĀNTIKĀ XVIII.5 वक्रमतस्तिथिभिर्द्वौ पञ्चभिरेवं ततोऽपरास्तमितः । दशभिः प्रागुदितः स्यान्नखैश्च जलधीन् मि(तान्) गत्वा ॥ ४ ॥ अनुवक्री परिगत्वा विपरीतमस्तमैत्यै(न्द्रयाम्) । षष्ट्यांशपञ्चसप्ततिमित्वाऽपरतो भृगुर्दृश्यः ॥ ५ ॥ ॥ वसिष्ठसिद्धान्ते शुक्रः ॥ Days for segments of motion in the synodic cycle 3. In three periods of 60 days Venus moves 74°, 73°, 72°, respectively. In 40 days it moves 32° and in 17 days, 5 1/4° 4. From here retrograde motion (begins). In 15 days these are 2°; in 5 days the same, i.e., 2°. Then, setting in the west, it rises in the east after ten days. Venus is in follow-up retrograde for 20 days, moving 4°. 5. Then continuing the (direct) motion round, in the order of days and motions reversed, Venus sets in the east. Then moving 75° in 60 days, it becomes visible in the west. The argument to be used in the above table of motions are the days left over, together with the eleventh of the quotient, as mentioned. It can be seen that in my emendations of some of these I have done very little violence to the text. I have been guided in these by the actual motion that must have been observed, putting it to observational or other error, where the numbers are clear, but deviate from the actual. The ratio of Venus's distance from the sun to the earth is c. 0.72 given by all Hindu and modern astronomy, and this I have used to compute the segments of actual motion for comparison. (See Table on next page) Another guide is that the days and motions from the superior to the inferior conjunction must add up to half of the whole, i.e., 292 days, and 287 3/4°, since the equation of the centre has been dispensed with. 72° motion for the third 60 days is about 4° in excess. For the next 40 days the motion has to be 36°, and I could have filled up the lacuna by (khaissat) instead of (khairdvā) to get this. But the Siddhānta seems to have compensated the earlier 4° excess by the 4° defect here, which of course is an error. From this we can see that the emendation of 'dviṁśat' into 'triṁśat' is necessary lest the motion be reduced to 26°, which is too small. 3a. A.B.C.D. षष्टित्रयेण B. सेप्ताग्नि B. मंशसप्त | ति; B. साप्तति भुक्ते c. A1. अर्धाष्टकेन विंशति (A1. om केन); B. अर्धाष्टकेन विंशातं (B2. विंशति) C. अर्धाष्टकेन सप्त; D. अर्धाष्टकविंशत्या d. A.B. विंशत्यैस्त्रिभिः सपादांशं; C. सप्तत्यंशांस्त्रिभिः सपादांशम्; D. विंशत्यं [शक्र] स्त्रिभिः सपादांशम् 4a. B. वक्रमतं क्षितिभिः d. B. स्रान्तरवैश्च A. मिता गत्वा; B. मिता गता; D. सितो for मितान् 5. B. verse missing 5a. C. दन्तक्वैः for परिगत्वा b. A1. मस्तमत्यैड्य्यां; A2. मस्तमत्यैड्यं; C. रवशरयमानस्तमेत्यैन्द्रयाम्; D. विपरीतं चास्तमेत्यैन्द्रयाम्