Suryasiddhanta 2.26

2.26

grahaṃ rāśyādikaṃ mandoccāt prāgānītasvakīyarāśyādikamandoccabhogāt saṃśodhyonīkṛtya śīghrāt prāgānītarāśyādiśīghroccāt | caḥ samuccaye | ūnīkṛtya śeṣaṃ rāśyātmakaṃ tayoccasambandhena kendraṃ mandoccāddhīno graho mandakendram | śīghroccāddhīno grahaḥ śīghrakendraṃ bhavatītyarthaḥ | tasmāt kendrāt padaṃ rāśitrayātmakaṃ viṣamaṃ samaṃ padaṃ jñeyam | trirāśyantargataṃ cet prathamaṃ viṣamaṃ padam | tataḥ ṣaḍrāśyantargataṃ cet tryūnaṃ kendraṃ dvitīyaṃ samaṃ padam | tato navarāśyantargataṃ cet ṣaḍūnaṃ tṛtīyaṃ viṣamaṃ padam | tato navonaṃ caturthaṃ padaṃ samamityarthaḥ | tasmāt padādbhujasya jyā koṭiḥ koṭerjyā caḥ samuccaye | evakārādekādahayaṃ sādhyamityarthaḥ || atropapattiḥ | uccasthānābhimukhamukhadeva tairgrahāṇāmākarṣaṇokteruccādgrahaḥ kiyadantareṇeti jñānārthamuccahīno grahaḥ kendramuccagrahayavannāt tadākhyam | tatra bhagavatā khecchayā grahāduccaṃ yadantareṇa tat kendraṃ kṛtam | ubhayathā bhujakoṭyostulyatvāt | dvādaśarāśyaṅkite vṛtta uccasthānāccaturvibhāgātmaka ekaiko bhāgo rāśitrayātmakaḥ padasaṃjñaḥ | athoccasthānādgrahaḥ kasmin pade'stīti śūnyatriṣannavonaṃ kendraṃ kṛtaṃ jyānāṃ padāntargatatvāt | grahādhiṣṭhitapadādbhujajyākoṭijyayorjñānam |
29 || nanu pade grahasya rāśivibhāgātmakanaikatvādbhujakoṭijyayoratulyayoḥ sādhanaṃ kathamityata āha |