{"id":"vidhyamitra:day:2316-04-13:en","page_class":"VM-1-day","url":"https://vidhyamitra.com/day/2316-04-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2316-04-13","date_display":"April 13, 2316 CE","panchanga":{"method":"Sūrya Siddhānta + Bhāskara-II iterative manda + Kerala-school (Mādhava-Nīlakaṇṭha) evection + variation + annual equation","engine_version":"2.0 (Kerala-school enhanced)","accuracy_note":"Sub-degree on Moon at any Kali-Yuga date (~2-5° residual max)","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":2316,"month":4,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2567063.770833,"kali_year":5417,"ahargana":1978598.2708,"sun":{"sidereal_longitude":354.0601,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":224.1703,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":20,"name":"Pañcamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Pañcamī","elongation_degrees":230.1102,"elapsed_within_tithi_degrees":2.1102},"nakshatra":{"number":17,"name":"Anurādhā","pada":4,"moon_longitude":224.1703,"elapsed_within_degrees":10.837},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":218.2305},"karana":{"half_tithi_index":38,"name":"Kaulava"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"sky":{"method":"Sūrya-Siddhāntic Bhāskara-II 4-step iteration with atan2-based śīghra + varying peripheries + lunar latitude","engine_version":"3.0 (Pūrṇa — complete SS implementation)","tradition_sources":"Āryabhaṭīya 499 CE → SS Ch.1-5 Burgess 1860 → Siddhānta-Śiromaṇi Bhāskara II 1150 → Tantrasaṅgraha Nīlakaṇṭha 1501","input":{"year":2316,"month":4,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2567063.770833,"ahargana":1978598.2708,"kali_year":5417,"ayanamsa_lahiri":28.2712,"grahas":{"sun":{"sidereal_longitude":354.646244,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":3},"retrograde":false},"moon":{"sidereal_longitude":221.97024399999998,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":3},"retrograde":false,"latitude":3.9028},"mars":{"sidereal_longitude":16.170244000000025,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":327.90374399999996,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":249.966944,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false},"venus":{"sidereal_longitude":312.618344,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":288.96864400000004,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":104.3419,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":284.3419,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false}},"panchang":{"method":"Sūrya Siddhānta + Bhāskara-II iterative manda + Kerala-school (Mādhava-Nīlakaṇṭha) evection + variation + annual equation","engine_version":"2.0 (Kerala-school enhanced)","accuracy_note":"Sub-degree on Moon at any Kali-Yuga date (~2-5° residual max)","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":2316,"month":4,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2567063.770833,"kali_year":5417,"ahargana":1978598.2708,"sun":{"sidereal_longitude":354.0601,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":224.1703,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":20,"name":"Pañcamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Pañcamī","elongation_degrees":230.1102,"elapsed_within_tithi_degrees":2.1102},"nakshatra":{"number":17,"name":"Anurādhā","pada":4,"moon_longitude":224.1703,"elapsed_within_degrees":10.837},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":218.2305},"karana":{"half_tithi_index":38,"name":"Kaulava"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.903,"elongation":129.89},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.903,"opposition_distance":50.11}},"eclipse_window_40days":[]},"calendars":{"vikram_samvat":2373,"vikram_samvatsara":"Saumya","saka_samvat":2238,"saka_samvatsara":"Durmukhi","bengali_samvat":1723,"malayalam_era":1492,"nanakshahi_year":847,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Caitra","lunar_month_amanta":"Caitra","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mīna (Paṅkuṇi)","ritu":"Vasanta (Spring)","display_summary":"Caitra Kṛṣṇa Pañcamī · Vikram 2373 Saumya · Śaka 2238 Durmukhi"},"festivals":[],"todays_walk":{"walk":{"id":"guru-walk","name":"Bṛhaspati Walk","name_sanskrit":"गुरु यात्रा","type":"graha","description":"Wisdom transmission + BG 4.34.","step_count":8,"url":"/walk/guru-walk"},"reason":"Guruvāra (Thursday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"valid_from":"2316-04-13T00:00:00Z"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate; Vidhyamitra substrate"},"seo":{"title":"Pañchāṅga April 13, 2316 CE · Vidhyamitra","description":"Vedic pañchāṅga for April 13, 2316 CE: Kṛṣṇa Pañcamī · Anurādhā.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/day/2316-04-13","hreflang_alternates":{"en":"https://vidhyamitra.com/day/2316-04-13","sa":"https://sa.vidhyamitra.com/day/2316-04-13","hi":"https://hi.vidhyamitra.com/day/2316-04-13","x-default":"https://vidhyamitra.com/day/2316-04-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-03T08:48:34.524Z","verification":{"type":"multi-marker","confidence":"canonical"}}],"meta":{"generated_at":"2026-06-03T08:48:34.524Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa"}}}