सिद्धान्तशिरोमणि: गणिताध्याय (भास्कराचार्य - ग्रहगणित, मध्यमाधिकार व स्पष्टाधिकार सटीक)

508 Purvāphalguni 12 - 0 north Purvāṣādhā 5 -20 south Uttarāphalguni 13 0 ,, Uttarāṣādhā 5 - 0 ,, Hasta 11 - 0 south Sravaṇam 30 - 0 north Chitrā 1°-45' ,, Abhijit 62 - 0 ,, Swātī 37°- 0 north Dhaniṣṭha 36 - 0 ,, Visākhā 1 -20' south Śatabhiṣak 0 -20 south Anūrādhā 1 -45 ,, Purvābhādrā 24 - 0 north Jyeṣṭhā 3 -30 ,, Uttarābhādrā 26 - 0 ,, Mulā 8 -30 ,, Revatī 0 - 0 ,, (a) These are also what were given by Brahmagupta and copied by Śrīpati, (b) Bhāskara mentions in the Golādhyāya "नक्षत्राणां स्फुटा एव स्थिरत्वात् पठिताः शराः, दृक्कर्मणा- ऽऽयनेनैषां संस्कृताश्च तथा ध्रुवाः" ie. In as much as the stars are fixed we have given their latitudes and longitudes rectified. But here, there is a point to be noted as Bhāskara has put us in a doubt namely that the rectified latitudes which he speaks of elsewhere under verse (3) Grahacchāyādhikāra, Gaṇitādhyaya are not exactly the polar latitudes spoken of here. (Ref. fig. 120). Let ♈MR be the ecliptic and ♈N be the celes- tial equator. Let S be a star, k be the pole of the ecliptic, and p be the celestial pole. Then ♈R is the celestial longitude, SR the celestial latitude which are known as the Dhruvaka and S'ara (Asphuta- s'ara). ♈M is the polar longitude [Fig. 120] and SM the polar latitude. MR is the arc connoting the Āyana- Dṛk-Karma correction, so that celestial longitude ± Āyana- Dṛk-Karma correction = polar longitude (plus or minus according as the longitude lies in the 2nd and 4th quadrants or 1st and 3rd quadrants). If the longitude just equals 0°, 90°, 180° or 270°, the correction of Āyana--Dṛk