Narada Purana — Purva Bhaga, Shloka 151
Jyotiṣa-śāstra Saṅgraha: Threefold Division, Gaṇita Methods, Muhūrta, and Planetary Reckoning
भागयुक्तं च हीनं च व्ययनांशं तनुः कुजे । प्राक्पश्चान्नतनाडीभ्यस्तद्वल्लंकोदयासुभिः ॥ १५१ ॥
bhāgayuktaṃ ca hīnaṃ ca vyayanāṃśaṃ tanuḥ kuje | prākpaścānnatanāḍībhyastadvallaṃkodayāsubhiḥ || 151 ||
லக்னத்தில் குஜன் (செவ்வாய்) இருப்பின், வேண்டிய பங்கால் கூட்டியும் குறைத்தும் ‘வ்யய-அம்சம்’ கணிக்க வேண்டும்; மேலும் கிழக்கு–மேற்கு நத-நாடி (நிழல் அளவுகள்) மூலமும், அதேபோல் லங்கா-உதய-அசு அளவுகளாலும் பெற வேண்டும்.
Sanatkumara (teaching to Narada in a technical Jyotisha/ganita passage)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: adbhuta
FAQs
It shows that Moksha-Dharma teaching in the Narada Purana also preserves Vedāṅga knowledge—disciplined time-reckoning and precise calculation—supporting correct timing for dharmic practice and study.
Indirectly: accurate Jyotiṣa calculation is presented as a supporting limb for dharma (right timing and order), which helps a devotee maintain steady sādhana; the verse itself is primarily technical rather than devotional.
Vedāṅga Jyotiṣa/astronomical computation: use of nata-nāḍī (gnomon/shadow-based measures), reference rising-time units (Laṅkā-udaya asu), and adjustment by fractional increase/decrease for determining a derived quantity (vyaya-aṃśa) when Mars is in the ascendant.