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Narada Purana — Purva Bhaga, Shloka 84

Jyotiṣa-śāstra Saṅgraha: Threefold Division, Gaṇita Methods, Muhūrta, and Planetary Reckoning

तद्वर्गतो दशगुणात्पद भूपरिधिर्भवेत् । लंबज्याघ्नस्वजीवाप्तः स्फुटो भूपरिधिः स्वकः ॥ ८४ ॥

tadvargato daśaguṇātpada bhūparidhirbhavet | laṃbajyāghnasvajīvāptaḥ sphuṭo bhūparidhiḥ svakaḥ || 84 ||

Daripada sepuluh kali ganda kuasa dua nilai itu, diperoleh lilitan bumi secara bertahap (anggaran). Namun lilitan yang tepat diperoleh dengan mendarabkannya dengan sinus jarak zenit (lamba-jyā), lalu membahagikannya dengan nilai jīva (sinus) milik sendiri.

तत्that
तत्:
विशेषण (Adjectival modifier/विशेषण)
TypeAdjective
Rootतद् (सर्वनाम-प्रातिपदिक)
Formनपुंसकलिङ्ग, प्रथमा/द्वितीया (1/2), एकवचन; demonstrative pronoun used adjectivally
वर्गतःfrom the group/class
वर्गतः:
अपादान (Source/अपादान)
TypeIndeclinable
Rootवर्ग (प्रातिपदिक) + तस् (तद्धित-अव्यय)
Formअव्यय; तसिल्-प्रत्ययान्त (ablatival adverb)
दशगुणात्from the tenfold (value)
दशगुणात्:
अपादान (Source/अपादान)
TypeAdjective
Rootदशगुण (प्रातिपदिक: दश + गुण)
Formपुंलिङ्ग, पञ्चमी (5), एकवचन; तद्धित/समासान्त विशेषण; components: दश (ten) + गुण (fold)
पदa step/measure (pada)
पद:
कर्म (Object/कर्म)
TypeNoun
Rootपद (प्रातिपदिक)
Formनपुंसकलिङ्ग, प्रथमा/द्वितीया (1/2), एकवचन
भू-परिधिःearth’s circumference
भू-परिधिः:
कर्ता (Subject/कर्ता)
TypeNoun
Rootपरिधि (प्रातिपदिक) with भू (प्रातिपदिक)
Formपुंलिङ्ग, प्रथमा (1), एकवचन; षष्ठी-तत्पुरुष: भू (earth) + परिधि (circumference)
भवेत्should be/becomes
भवेत्:
क्रिया (Verb/क्रिया)
TypeVerb
Rootभू (धातु)
Formविधिलिङ् (Optative), प्रथमपुरुष (3rd), एकवचन; परस्मैपद
लम्बperpendicular/height (lamba)
लम्ब:
समासाङ्ग (Compound member/समासाङ्ग)
TypeNoun
Rootलम्ब (प्रातिपदिक)
Formपुंलिङ्ग, प्रथमा/द्वितीया (1/2), एकवचन; used as first member in compound
ज्याchord (jyā)
ज्या:
समासाङ्ग (Compound member/समासाङ्ग)
TypeNoun
Rootज्या (प्रातिपदिक)
Formस्त्रीलिङ्ग, प्रथमा/द्वितीया (1/2), एकवचन; used as compound member
अघ्न(technical) aghna-factor
अघ्न:
समासाङ्ग (Compound member/समासाङ्ग)
TypeNoun
Rootअघ्न (प्रातिपदिक)
Formपुंलिङ्ग, प्रथमा/द्वितीया (1/2), एकवचन; used as compound member (technical term)
स्व-जीव-आप्तःobtained by one’s own jīva (value)
स्व-जीव-आप्तः:
विशेषण (Adjectival modifier/विशेषण)
TypeAdjective
Rootआप्त (कृदन्त-प्रातिपदिक; आप्/आप्नोति धातु) with स्व + जीव
Formपुंलिङ्ग, प्रथमा (1), एकवचन; क्त-प्रत्ययान्त (past passive participle) ‘obtained’; compound: स्व (own) + जीव (jīva/quantity) + आप्त (obtained)
स्फुटःclear/explicit
स्फुटः:
विशेषण (Adjectival modifier/विशेषण)
TypeAdjective
Rootस्फुट (प्रातिपदिक)
Formपुंलिङ्ग, प्रथमा (1), एकवचन
भू-परिधिःearth’s circumference
भू-परिधिः:
कर्ता (Subject/कर्ता)
TypeNoun
Rootपरिधि (प्रातिपदिक) with भू (प्रातिपदिक)
Formपुंलिङ्ग, प्रथमा (1), एकवचन; षष्ठी-तत्पुरुष
स्वकःone’s own/proper
स्वकः:
विशेषण (Adjectival modifier/विशेषण)
TypeAdjective
Rootस्वक (प्रातिपदिक)
Formपुंलिङ्ग, प्रथमा (1), एकवचन

Narada (teaching in a technical/astronomical context within Moksha-Dharma discourse)

Vrata: none

Primary Rasa: shanta

Secondary Rasa: adbhuta

FAQs

It shows that Narada Purana integrates dharma with disciplined knowledge—precision (sphuṭa) and correct method are themselves part of righteous learning that supports clarity of understanding.

Indirectly: it frames sacred study as orderly and exact, encouraging a devotee to approach Vishnu’s cosmos with reverence and intellectual honesty rather than guesswork.

Vedāṅga Jyotiṣa/gaṇita: the verse references jyā/jīva (sine) operations and distinguishes approximate versus accurate computations for determining bhū-paridhi (earth’s circumference).