Jyotiṣa-śāstra Saṅgraha: Threefold Division, Gaṇita Methods, Muhūrta, and Planetary Reckoning
भास्करेंद्वो र्भचक्रांत चक्रार्द्धावधिसंस्थयोः । दृक्कल्पसाधितांशादियुक्तयोः स्वावपक्रमौ ॥ १७६ ॥
bhāskareṃdvo rbhacakrāṃta cakrārddhāvadhisaṃsthayoḥ | dṛkkalpasādhitāṃśādiyuktayoḥ svāvapakramau || 176 ||
Bagi Matahari dan Bulan—apabila berada di hujung bulatan zodiak atau pada had separuh bulatan—hendaklah ditentukan apakrama (deklinasi) masing‑masing dengan menerapkan darjah serta nilai berkaitan yang dihitung menurut dṛkkalpa (kaedah pemerhatian astronomi).
Sanatkumara (in instruction to Narada, within the Moksha-Dharma teaching that includes Vedanga/astronomical aids)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: none
It highlights that accurate knowledge (yathārtha-jñāna)—even in technical fields like Jyotiṣa—supports dharma and right timing for sacred acts, which in turn steadies the mind for mokṣa-oriented practice.
Indirectly: by stressing precise reckoning of the Sun and Moon, it supports correct observance of vrata, tithi, and festival timings—frameworks within which Viṣṇu-bhakti and other devotional disciplines are traditionally practiced.
Vedāṅga Jyotiṣa—specifically, computing the Sun’s and Moon’s apakrama (declination) using drik-based (observational) calculations in degrees (aṃśa) and related measures.