Jyotiṣa-śāstra Saṅgraha: Threefold Division, Gaṇita Methods, Muhūrta, and Planetary Reckoning
गते शोद्ध्यं तथा योज्यं गम्ये तात्कालिको ग्रहः । भचक्रलिप्ताशीत्यंशः परमं दक्षिणोत्तरम् ॥ ८९ ॥
gate śoddhyaṃ tathā yojyaṃ gamye tātkāliko grahaḥ | bhacakraliptāśītyaṃśaḥ paramaṃ dakṣiṇottaram || 89 ||
Bei dem, was bereits verstrichen ist, soll man abziehen; ebenso soll man bei dem, was zu erreichen ist, hinzufügen. Was zu bestimmen ist, dafür nehme man die Planetenstellung genau zu jener Zeit. Der Tierkreis wird in Graden und Minuten gerechnet; die äußerste Grenze beträgt achtzig Grad und bezeichnet das äußerste Süd- und Nordmaß.
Sanatkumara (teaching Narada)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: adbhuta
It frames Jyotiṣa as a disciplined, rule-based limb of Vedic knowledge—showing that correct time-and-position reckoning supports dharma (right timing of rites) and steadies the mind through accurate understanding of kāla (time).
Indirectly: by teaching precision in kāla and graha reckoning, it supports proper observance of vrata and worship timings, which are core supports for sustained Viṣṇu-bhakti in Purāṇic practice.
Vedāṅga Jyotiṣa: computational rules—subtract for elapsed portions, add for remaining portions, use the planet’s current (tātkālika) position, and express results in aṃśa (degrees) and lipta (minutes) with stated directional limits (dakṣiṇa/uttara).