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 ||
കിഴക്ക്–പടിഞ്ഞാറ് ദിശയെ ആശ്രയിച്ച രേഖയെ ‘സമമണ്ഡലം’ എന്നു പറയുന്നു. അതേ രേഖ ‘ഭമണ്ഡലം’ എന്നും ‘വിഷുവന്മണ്ഡലം’ എന്നും കൂടി പ്രസിദ്ധമാണ്.
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.