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

Chapter Eighteen (VĀSIṢṬHA-) PAULIŚA-SIDDHĀNTA — RISING AND SETTING OF PLANETS अष्टादशोऽध्यायः वासिष्ठ-पौलिशसिद्धान्तौ — ग्रहोदयास्ताधिकारः Introductory Chapter XVIII of PS (NP’s ch. XVII) deals primarily with the star-planets according to the Vāsiṣṭha and Pauliśa siddhāntas. The true motion of the planets is traced from one heliacal rising to the next. The method of getting the true anomaly of the equation of the centre is similar to that of the Moon given by the Vāsiṣṭha in ch. II and based on the same theory of the rate of motion, forming a linear zigzag. Even the same technical term pada is used here. All these are reminiscent of the Babylonian astronomy of the Selucid period. The text as available too is not very pure and this too has made the interpretation of this chapter difficult for TS. In my paper on ‘Some misinterpretations and omissions of Thibaut and Sudhakara Dvivedi in the PS of VM’ (VIJ., 11 (1973) 107-18) I have indicated the errors occurring in the said publication. NP have improved upon TS’s interpretation in some places, but have committed worse mistakes in other places. TS and NP have also failed to understand how the equation of the centre has been computed and applied to the equation of con- junction of Jupiter and Saturn. Since they had to interpret, in some way or other, the related verses, they have altered the verses, in all sorts of ways, to yield what they thought the meaning might be. Even in the case of Venus, where computation has been made simpler by neglecting the small equation of the centre, they have committed several errors which have been pointed out in the exposition of these verses given below. [शुक्रचारः] हित्वा ‘(जलमुनि) चन्द्रा (न्)’ द्युगणाद् ‘वेदाष्ट-भूत’हृतलब्धाः | शुक्रोदया गुणाप्तैः सार्धाः पञ्चालिनो भोगाः || १ || कन्यांशा [न्] षड्विंशतिमित्वा शुक्रोऽपरेण या [त्यु] दयम् | उदयैकादशभागान् दिनेषु दत्वा तत [श्चा] राः || २ || Motion of Venus

1. Subtracting 174 from the days from epoch, the quotient got by dividing the remainder by 584 are the heliacal risings of Venus. Its motions during the periods is 7ʳ 5° 30' 20" each.
2. Having gone to 26° of Virgo, i.e. at, 5ʳ 26°, Venus rises in the west (for the first time after epoch). Adding an eleventh of the quotient (given in verse 1) to the remaining days, the motions (are to be taken from the Table given in verses 3-5).