தொலைந்த ஜாதகம் - பிருஹத் பராசர ஹோர சாஸ்திரம்

10. Maitreya asked. O Sage! Guru returns to the same Rasi after every 12 years. Then from which circle of Guru should Samvatsar be determined.

11-12. The Sage said in reply. O Maitreya! When there is any doubt about the Samvatsar, take the approximate age of the querist and add multiples of 12 to the difference between the Rasi of the Guru at the time of query and his Rasi at the time of birth. The figure so arrived at should be taken, as the possible number of years and the Samvatsar should be determined accordingly. If by adding 12 there may appear to be difference in age, the position of Guru should be fixed, according to guessed approximate age, in the Trikon Rasi, 5^th, or 9^th of the Prasna Lagn, as may be found feasible. Then, taking that, as the Samvatsar, the Ayana, Ritu etc. should be worked out accordingly in the manner already explained.

13. Maitreya asked again. O Sage! How will the time of birth be known after ascertaining the month and the Amsas etc. of Surya. Please explain this for the benefit of the people.

14-16.The Sage said. After ascertaining the Rasi, Amsas etc. of Surya at the time of birth, the longitude of Surya (Surya Spast) should be worked out for the next day after the number of days, taken by Surya after entering into the Rasi, which will be equal to the expired Amsas of Surya. Then the difference between the longitudes of this rising Surya and Surya at the time of birth should be converted into Kalas and multiplied by 60. The product should be divided by Surya Spast, converted into Kalas. The Ghatikas etc. so becoming available will represent the Istakal of the birth before and after sunrise. If the longitude of the Ista Surya be more than that of the rising Surya, the Istakal of the birth will be so much after the sunrise. If the longitude of the Ista Surya be less than that of the rising Surya, the Istakal of the birth will be so much before the sunrise.