{"id":"vidhyamitra:day:1990-12-27:en","page_class":"VM-1-day","url":"https://vidhyamitra.com/day/1990-12-27","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1990-12-27","date_display":"December 27, 1990 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":1990,"month":12,"day":27,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2448252.770833,"kali_year":5092,"ahargana":1859787.2708,"sun":{"sidereal_longitude":251.0244,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":8.5579,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":10,"name":"Daśamī","paksha":"Śukla","full_name":"Śukla Daśamī","elongation_degrees":117.5335,"elapsed_within_tithi_degrees":9.5335},"nakshatra":{"number":1,"name":"Aśvinī","pada":3,"moon_longitude":8.5579,"elapsed_within_degrees":8.5579},"yoga":{"number":20,"name":"Śiva","sum_longitude":259.5823},"karana":{"half_tithi_index":19,"name":"Gara"},"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":1990,"month":12,"day":27,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2448252.770833,"ahargana":1859787.2708,"kali_year":5092,"ayanamsa_lahiri":23.7271,"grahas":{"sun":{"sidereal_longitude":251.28369799999996,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":4},"retrograde":false},"moon":{"sidereal_longitude":5.494098000000008,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false,"latitude":4.4994},"mars":{"sidereal_longitude":34.40619800000002,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":244.94739800000002,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":true},"jupiter":{"sidereal_longitude":108.60429799999997,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":1},"retrograde":true},"venus":{"sidereal_longitude":264.926098,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":271.192098,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":279.5205,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":99.5205,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","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":1990,"month":12,"day":27,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2448252.770833,"kali_year":5092,"ahargana":1859787.2708,"sun":{"sidereal_longitude":251.0244,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":8.5579,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":10,"name":"Daśamī","paksha":"Śukla","full_name":"Śukla Daśamī","elongation_degrees":117.5335,"elapsed_within_tithi_degrees":9.5335},"nakshatra":{"number":1,"name":"Aśvinī","pada":3,"moon_longitude":8.5579,"elapsed_within_degrees":8.5579},"yoga":{"number":20,"name":"Śiva","sum_longitude":259.5823},"karana":{"half_tithi_index":19,"name":"Gara"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.499,"elongation":117.534},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.499,"opposition_distance":62.466}},"eclipse_window_40days":[{"offset_days":20,"type":"solar","occurs":true,"moon_latitude":-0.479,"elongation":0.76}]},"calendars":{"vikram_samvat":2047,"vikram_samvatsara":"Subhānu","saka_samvat":1912,"saka_samvatsara":"Pramoda","bengali_samvat":1397,"malayalam_era":1166,"nanakshahi_year":521,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Śukla Pakṣa","solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Śukla Daśamī · Vikram 2047 Subhānu · Śaka 1912 Pramoda"},"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}],"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":[{"historical_date":"-3101-02-18","event":"Kali Yuga Epoch","chart_id":"kali-yuga-epoch","shared_marker":"same Aśvinī","url":"/day/-3101-02-18","relevance":0.5}]},"validity":{"eternal":false,"valid_from":"1990-12-27T00:00:00Z"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate; Vidhyamitra substrate"},"seo":{"title":"Pañchāṅga December 27, 1990 CE · Vidhyamitra","description":"Vedic pañchāṅga for December 27, 1990 CE: Śukla Daśamī · Aśvinī.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/day/1990-12-27","hreflang_alternates":{"en":"https://vidhyamitra.com/day/1990-12-27","sa":"https://sa.vidhyamitra.com/day/1990-12-27","hi":"https://hi.vidhyamitra.com/day/1990-12-27","x-default":"https://vidhyamitra.com/day/1990-12-27"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T06:00:05.705Z","verification":{"type":"multi-marker","confidence":"canonical"}}],"meta":{"generated_at":"2026-05-14T06:00:05.705Z","pillar_versions":{"BOB-History":"Pūrṇa"}}}