Suryasiddhanta 2.58

2.58

yasya grahasya spaṣṭakrāntirabhīṣṭā tasya grahasyāyanāṃśasaṃskṛtasya bhujajyāyāḥ paramāpakramajyetyādinā krāntirayanāṃśasaṃskṛtagrahagoladikkā jñeyā | tasya vikṣepo'pi pūrvoktaprakāreṇa pātonagoladikko jñeyaḥ | golastu meṣādiṣaṭkamuttarastulādiṣaṭkaṃ dakṣiṇaḥ | atha śarakrāntyoraikadiktvena krāntiḥ kalādyā kalātmakavikṣepeṇa yutā tayordiganyatve krāntirvikṣepeṇa viyutāntaritā śeṣadigjñā spaṣṭā krāntiḥ syāt | nanu sūryasya vikṣepābhāvāt kathaṃ spaṣṭā krāntirjñeyetyata āha | bhāskarasyeti | sūryasya yathāgatā pūrvāgatā krāntireva spaṣṭā krāntiḥ | atropapattiḥ | viṣuvadvṛttādgrahabimbakendraparyantaṃ yāmyamuttaraṃ vāntaraṃ spaṣṭakrāntiriti tayorekadiktve tadyogatulyamantaraṃ bhinnadiktve tadantaramitamantaramiti | ata śarasya krāntisaṃskārayogyatvasampādikā kriyā lokabhramabhayāt khalpāntaratvānnopecitā bhagavatā kṛpāvatā | anyathā śarasya dhruvābhimukhatve bhagavaduktamāyanadṛkkarma kathamavyāhataṃ syādityalam |
atha dinarātrimānajñānārthamahorātrāsūn sādhayati |