{"id":"vidhyamitra:day:-1626087-12-15:en","page_class":"VM-1-day","url":"https://vidhyamitra.com/day/-1626087-12-15","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"-1626087-12-15","date_display":"December 15, 1626088 BCE","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":-1626087,"month":12,"day":15,"hour":6,"minute":30,"second":0,"calendar":"julian"},"julian_day":-592206870.229167,"kali_year":-1622946,"ahargana":-592795335.7292,"sun":{"sidereal_longitude":263.7562,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":310.8235,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":47.0673,"elapsed_within_tithi_degrees":11.0673},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2,"moon_longitude":310.8235,"elapsed_within_degrees":4.1568},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":214.5797},"karana":{"half_tithi_index":7,"name":"Viṣṭi"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"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":-1626087,"month":12,"day":15,"hour":6,"minute":30,"calendar":"julian"},"julian_day":-592206870.229167,"ahargana":-592795335.7292,"kali_year":-1622946,"ayanamsa_lahiri":-22719.6041,"grahas":{"sun":{"sidereal_longitude":263.7562,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":310.8235,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"retrograde":false,"latitude":-4.447},"mars":{"sidereal_longitude":227.8517,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":244.088,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":true},"jupiter":{"sidereal_longitude":31.1369,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":true},"venus":{"sidereal_longitude":257.6823,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":7.265,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":49.6179,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":229.6179,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"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":-1626087,"month":12,"day":15,"hour":6,"minute":30,"second":0,"calendar":"julian"},"julian_day":-592206870.229167,"kali_year":-1622946,"ahargana":-592795335.7292,"sun":{"sidereal_longitude":263.7562,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":310.8235,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":47.0673,"elapsed_within_tithi_degrees":11.0673},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2,"moon_longitude":310.8235,"elapsed_within_degrees":4.1568},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":214.5797},"karana":{"half_tithi_index":7,"name":"Viṣṭi"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.447,"elongation":47.067},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.447,"opposition_distance":132.933}},"eclipse_window_40days":[{"offset_days":-18,"type":"lunar","occurs":true,"moon_latitude":1.31,"opposition_distance":2.257}]},"calendars":{"vikram_samvat":-1626030,"saka_samvat":-1626165,"bengali_samvat":-1626680,"malayalam_era":-1626911,"nanakshahi_year":-1627556,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Śukla Pakṣa","solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Śukla Caturthī · Vikram -1626030 undefined · Śaka -1626165 undefined"},"festivals":[{"id":"lohri","name":"Lohri","name_sanskrit":"लोहड़ी","tradition":"Regional","significance":"Punjab harvest festival; eve of Makara Saṅkrānti. (Approximated as 13/14 January annually; correct via Sun in Dhanu/Makara cusp.)","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":4},{"id":"dhanu-sankranti","name":"Dhanu Saṅkrānti","name_sanskrit":"धनु सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Sagittarius; Dhanu-māsa (Khara-māsa).","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":5},{"id":"vinayaka-chaturthi","name":"Vināyaka Caturthī (monthly)","name_sanskrit":"विनायक चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Śukla-pakṣa Caturthī; auspicious for new ventures.","vrata":true,"detection":{"tithi_number":4,"tithi_paksha":"Śukla"},"precedence":6}],"todays_walk":{"walk":{"id":"shukra-walk","name":"Śukra Walk","name_sanskrit":"शुक्र यात्रा","type":"graha","description":"Beauty + creativity in dharma + BG 10.36.","step_count":5,"url":"/walk/shukra-walk"},"reason":"Śukravāra (Friday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":true},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate; Vidhyamitra substrate"},"seo":{"title":"Pañchāṅga December 15, 1626088 BCE · Vidhyamitra","description":"Vedic pañchāṅga for December 15, 1626088 BCE: Śukla Caturthī · Śatabhiṣā.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/day/-1626087-12-15","hreflang_alternates":{"en":"https://vidhyamitra.com/day/-1626087-12-15","sa":"https://sa.vidhyamitra.com/day/-1626087-12-15","hi":"https://hi.vidhyamitra.com/day/-1626087-12-15","x-default":"https://vidhyamitra.com/day/-1626087-12-15"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T20:17:10.665Z","verification":{"type":"multi-marker","confidence":"canonical"}}],"meta":{"generated_at":"2026-05-14T20:17:10.665Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa"}}}