{"id":"vidhyamitra:day:1851-02-20:en","page_class":"VM-1-day","url":"https://vidhyamitra.com/day/1851-02-20","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1851-02-20","date_display":"February 20, 1851 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":1851,"month":2,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2397173.770833,"kali_year":4952,"ahargana":1808708.2708,"sun":{"sidereal_longitude":309.5547,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":181.0516,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":20,"name":"Pañcamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Pañcamī","elongation_degrees":231.4969,"elapsed_within_tithi_degrees":3.4969},"nakshatra":{"number":14,"name":"Citrā","pada":3,"moon_longitude":181.0516,"elapsed_within_degrees":7.7183},"yoga":{"number":10,"name":"Gaṇḍa","sum_longitude":130.6064},"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":1851,"month":2,"day":20,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2397173.770833,"ahargana":1808708.2708,"kali_year":4952,"ayanamsa_lahiri":21.7735,"grahas":{"sun":{"sidereal_longitude":309.08039099999996,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":183.33349099999998,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":4},"retrograde":false,"latitude":4.3488},"mars":{"sidereal_longitude":289.791791,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":285.14699100000007,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":182.926691,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":3},"retrograde":true},"venus":{"sidereal_longitude":264.512391,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":357.562591,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":105.9317,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":285.9317,"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":1851,"month":2,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2397173.770833,"kali_year":4952,"ahargana":1808708.2708,"sun":{"sidereal_longitude":309.5547,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":181.0516,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":20,"name":"Pañcamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Pañcamī","elongation_degrees":231.4969,"elapsed_within_tithi_degrees":3.4969},"nakshatra":{"number":14,"name":"Citrā","pada":3,"moon_longitude":181.0516,"elapsed_within_degrees":7.7183},"yoga":{"number":10,"name":"Gaṇḍa","sum_longitude":130.6064},"karana":{"half_tithi_index":38,"name":"Kaulava"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.349,"elongation":128.503},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.349,"opposition_distance":51.497}},"eclipse_window_40days":[{"offset_days":-19,"type":"solar","occurs":true,"moon_latitude":-0.149,"elongation":1.414},{"offset_days":-4,"type":"lunar","occurs":true,"moon_latitude":1.378,"opposition_distance":1.518}]},"calendars":{"vikram_samvat":1908,"vikram_samvatsara":"Raktākṣī","saka_samvat":1773,"saka_samvatsara":"Virodhakṛt","bengali_samvat":1258,"malayalam_era":1027,"nanakshahi_year":382,"lunar_month":"Phālguna","lunar_month_paksha_full":"Phālguna Kṛṣṇa Pakṣa","solar_month":"Kumbha (Māsi)","ritu":"Śiśira (Winter)","display_summary":"Phālguna Kṛṣṇa Pañcamī · Vikram 1908 Raktākṣī · Śaka 1773 Virodhakṛt"},"festivals":[{"id":"kumbha-sankranti","name":"Kumbha Saṅkrānti","name_sanskrit":"कुम्भ सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Aquarius; Kumbha-māsa begins.","vrata":false,"detection":{"sun_rashi":"Kumbha"},"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":[]},"validity":{"eternal":false,"valid_from":"1851-02-20T00:00:00Z"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate; Vidhyamitra substrate"},"seo":{"title":"Pañchāṅga February 20, 1851 CE · Vidhyamitra","description":"Vedic pañchāṅga for February 20, 1851 CE: Kṛṣṇa Pañcamī · Citrā.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/day/1851-02-20","hreflang_alternates":{"en":"https://vidhyamitra.com/day/1851-02-20","sa":"https://sa.vidhyamitra.com/day/1851-02-20","hi":"https://hi.vidhyamitra.com/day/1851-02-20","x-default":"https://vidhyamitra.com/day/1851-02-20"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T22:12:21.409Z","verification":{"type":"multi-marker","confidence":"canonical"}}],"meta":{"generated_at":"2026-05-18T22:12:21.409Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa"}}}