Jyotiṣa-śāstra Saṅgraha: Threefold Division, Gaṇita Methods, Muhūrta, and Planetary Reckoning
ग्रासेन स्वाहतेच्छाद्यमानामे स्युर्विशोपकाः । पूर्णांतं मध्यमत्र स्याद्दर्शांतेंजं त्रिभोनकम् ॥ १५८ ॥
grāsena svāhatecchādyamānāme syurviśopakāḥ | pūrṇāṃtaṃ madhyamatra syāddarśāṃteṃjaṃ tribhonakam || 158 ||
Wenn die Mondanteile (kalā) während einer Finsternis durch den eigenen «Biss» des Mondes bedeckt werden, heißen sie viśopakāḥ. In dieser Rechnung gilt das «Ende der Fülle» als Mittelpunkt; und am Ende der Halbmonatsspanne (darśānta) wird der «Ungeborene» (aja) als dreifach (tribhonaka) bezeichnet.
Sanatkumara (teaching Narada in a technical dharma/observance context)
Vrata: none
Primary Rasa: adbhuta
Secondary Rasa: shanta
It links spiritual discipline with precise time-knowledge: understanding lunar transitions and eclipse-conditions is presented as part of dharmic order, supporting correct observance and inner steadiness.
Indirectly: by emphasizing correct ritual timing and clarity about lunar states, it supports orderly worship and vrata-practice, which in the Narada Purana are often framed as aids to steady Vishnu-bhakti.
Vedāṅga Jyotiṣa (astronomical/astrological reckoning): technical naming of obscuration during eclipse, and rules about ‘middle’ and ‘end’ points tied to pūrṇānta and darśānta calculations.