Jyotiṣa-saṅgraha: Varga-vibhāga, Bala-nirṇaya, Garbha-phala, Āyuḥ-gaṇanā
सबलेंगेभतुल्याब्दैर्युतमायुर्भवेत्स्फुटम् । अंशद्विध्नमक्षांशं मासाः खत्र्यादिसंगुणात् ॥ १३५ ॥
sabaleṃgebhatulyābdairyutamāyurbhavetsphuṭam | aṃśadvidhnamakṣāṃśaṃ māsāḥ khatryādisaṃguṇāt || 135 ||
When the relevant factors are strong, the computed lifespan becomes clear: add years equal to the number corresponding to the rāśi beginning with Leo. Take the akṣāṃśa (latitude) doubled in degrees, and by multiplying with the appropriate constants (beginning with ‘kha’ and so on), the result is obtained in months.
Sanatkumara (in instruction to Narada on technical computation)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: none
It frames jyotiṣa as a disciplined, rule-based Vedāṅga tool—showing that even worldly measures like lifespan are approached through precise calculation under dharmic instruction, not superstition.
Direct bhakti practice is not taught in this line; instead, it supports the broader Purāṇic framework where correct knowledge (including Vedāṅga jyotiṣa) can guide a devotee’s disciplined life toward dharma and ultimately mokṣa.
Vedāṅga Jyotiṣa: an applied computational rule for āyurdaya (lifespan) using rāśi-based year additions, latitude (akṣāṃśa), degree-doubling, and traditional coefficient series to convert results into months.