Jyotiṣa-śāstra Saṅgraha: Threefold Division, Gaṇita Methods, Muhūrta, and Planetary Reckoning
प्रांक्पश्चिमाश्रिता रेखा प्रोच्यते सममंडलम् । भमंडलं च विषुवन्मंडलं परिकीर्तितम् ॥ १३३ ॥
prāṃkpaścimāśritā rekhā procyate samamaṃḍalam | bhamaṃḍalaṃ ca viṣuvanmaṃḍalaṃ parikīrtitam || 133 ||
La ligne qui s’étend selon l’axe est–ouest est appelée samamaṇḍala, le cercle des équinoxes. Elle est aussi nommée bhamaṇḍala, cercle céleste, et l’on la célèbre encore comme viṣuvanmaṇḍala, l’équateur.
Sanatkumara (teaching Narada in a technical-cosmological passage)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: adbhuta
It frames cosmic order through precise astronomical terminology, implying that dharma and sacred timekeeping rest on a well-understood structure of the universe.
Indirectly: by clarifying the cosmic framework used to compute sacred times, it supports orderly worship and vrata observance, which in the Purana serve as aids to devotion.
Vedāṅga Jyotiṣa: the verse defines the equinoctial circle/equator (viṣuvanmaṇḍala) and its synonyms used in traditional astronomical and calendrical calculations.