Narada Purana — Purva Bhaga, Shloka 91
Jyotiṣa-śāstra Saṅgraha: Threefold Division, Gaṇita Methods, Muhūrta, and Planetary Reckoning
बुधशुक्रार्कजाः पातैर्विक्षिप्यंते चतुर्गुणम् । राशिलिप्ताष्टमो भागः प्रथमं ज्यार्द्धमुच्यते ॥ ९१ ॥
budhaśukrārkajāḥ pātairvikṣipyaṃte caturguṇam | rāśiliptāṣṭamo bhāgaḥ prathamaṃ jyārddhamucyate || 91 ||
ดาวพุธ ดาวศุกร์ และดาวเสาร์ ให้ปรับด้วยปาตะของตนแล้วคูณเป็นสี่เท่า ส่วนหนึ่งในแปดของราศีเมื่อแสดงเป็นองศาและลิปตา เรียกว่า ‘ครึ่งเชือกแรก’ (ชยา-อรรธะ).
Sanatkumara (teaching Narada)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: adbhuta
FAQs
It preserves Vedāṅga Jyotiṣa as a supportive discipline—showing that precise knowledge of time, celestial measures, and calculation can aid dharma-based life and scriptural observances, which ultimately support the pursuit of mokṣa.
Indirectly: by teaching the technical basis used to determine auspicious timings and calendrical measures, it supports orderly performance of vows, worship, and dharmic duties—practices that, when offered to Viṣṇu with devotion, become bhakti-oriented sādhanā.
Vedāṅga Jyotiṣa (astronomy/astrology) and gaṇita: it gives a computational rule involving planetary correction by pāta and defining the first jyā-ardha as one-eighth of a rāśi expressed in degrees and minutes.