{"id":"vidhyamitra:day:1813-09-07:en","page_class":"VM-1-day","url":"https://vidhyamitra.com/day/1813-09-07","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1813-09-07","date_display":"September 7, 1813 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":1813,"month":9,"day":7,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2383493.770833,"kali_year":4915,"ahargana":1795028.2708,"sun":{"sidereal_longitude":142.4727,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":278.6642,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":136.1915,"elapsed_within_tithi_degrees":4.1915},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4,"moon_longitude":278.6642,"elapsed_within_degrees":11.9975},"yoga":{"number":5,"name":"Śobhana","sum_longitude":61.1368},"karana":{"half_tithi_index":22,"name":"Bava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"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":1813,"month":9,"day":7,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2383493.770833,"ahargana":1795028.2708,"kali_year":4915,"ayanamsa_lahiri":21.2503,"grahas":{"sun":{"sidereal_longitude":142.735368,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false},"moon":{"sidereal_longitude":278.901068,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false,"latitude":0.9423},"mars":{"sidereal_longitude":283.958668,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":129.930568,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":126.01426800000002,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":173.37416800000005,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":263.47566800000004,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":110.7639,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":290.7639,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4},"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":1813,"month":9,"day":7,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2383493.770833,"kali_year":4915,"ahargana":1795028.2708,"sun":{"sidereal_longitude":142.4727,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":278.6642,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":136.1915,"elapsed_within_tithi_degrees":4.1915},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4,"moon_longitude":278.6642,"elapsed_within_degrees":11.9975},"yoga":{"number":5,"name":"Śobhana","sum_longitude":61.1368},"karana":{"half_tithi_index":22,"name":"Bava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":0.942,"elongation":136.192},"lunar":{"type":"lunar","occurs":false,"moon_latitude":0.942,"opposition_distance":43.808}},"eclipse_window_40days":[]},"calendars":{"vikram_samvat":1870,"vikram_samvatsara":"Vyaya","saka_samvat":1735,"saka_samvatsara":"Śrīmukha","bengali_samvat":1220,"malayalam_era":989,"nanakshahi_year":344,"lunar_month":"Bhādrapada","lunar_month_paksha_full":"Bhādrapada Śukla Pakṣa","solar_month":"Siṃha (Āvaṇi)","ritu":"Varṣā (Monsoon)","display_summary":"Bhādrapada Śukla Dvādaśī · Vikram 1870 Vyaya · Śaka 1735 Śrīmukha"},"festivals":[{"id":"vamana-jayanti","name":"Vāmana Jayantī","name_sanskrit":"वामन जयन्ती","tradition":"Vaishnava","associated_deity":"Vāmana (5th daśāvatāra of Krishna)","deity_avatara_index":15,"significance":"Vāmana's three-step measure of all worlds; Bali's surrender. (= Onam in Kerala.)","vrata":true,"detection":{"tithi_number":12,"tithi_paksha":"Śukla","lunar_month":"Bhādrapada"},"precedence":2,"sources":["Bhāgavata 8.18-22"]},{"id":"simha-sankranti","name":"Siṁha Saṅkrānti","name_sanskrit":"सिंह सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Leo.","vrata":false,"detection":{"sun_rashi":"Siṃha"},"precedence":5}],"todays_walk":{"walk":{"id":"mangala-walk","name":"Maṅgala Walk","name_sanskrit":"मङ्गल यात्रा","type":"graha","description":"Right action + BG 2.31-38 (kṣatriya-dharma).","step_count":7,"url":"/walk/mangala-walk"},"reason":"Maṅgalavāra (Tuesday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"valid_from":"1813-09-07T00:00:00Z"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate; Vidhyamitra substrate"},"seo":{"title":"Pañchāṅga September 7, 1813 CE · Vidhyamitra","description":"Vedic pañchāṅga for September 7, 1813 CE: Śukla Dvādaśī · Uttara Āṣāḍhā.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/day/1813-09-07","hreflang_alternates":{"en":"https://vidhyamitra.com/day/1813-09-07","sa":"https://sa.vidhyamitra.com/day/1813-09-07","hi":"https://hi.vidhyamitra.com/day/1813-09-07","x-default":"https://vidhyamitra.com/day/1813-09-07"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-22T00:57:32.220Z","verification":{"type":"multi-marker","confidence":"canonical"}}],"meta":{"generated_at":"2026-05-22T00:57:32.220Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa"}}}