{"id":"vidhyamitra:day:-0547-04-22:en","page_class":"VM-1-day","url":"https://vidhyamitra.com/day/-0547-04-22","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"-0547-04-22","date_display":"April 22, 548 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":-547,"month":4,"day":22,"hour":6,"minute":30,"second":0,"calendar":"julian"},"julian_day":1521377.770833,"kali_year":2555,"ahargana":932912.2708,"sun":{"sidereal_longitude":42.1644,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":184.791,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":142.6266,"elapsed_within_tithi_degrees":10.6266},"nakshatra":{"number":14,"name":"Citrā","pada":4,"moon_longitude":184.791,"elapsed_within_degrees":11.4577},"yoga":{"number":18,"name":"Varīyān","sum_longitude":226.9554},"karana":{"half_tithi_index":23,"name":"Bālava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"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":-547,"month":4,"day":22,"hour":6,"minute":30,"calendar":"julian"},"julian_day":1521377.770833,"ahargana":932912.2708,"kali_year":2555,"ayanamsa_lahiri":-11.7224,"grahas":{"sun":{"sidereal_longitude":42.1644,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":184.791,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":4},"retrograde":false,"latitude":4.0785},"mars":{"sidereal_longitude":6.0559,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":20.4535,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":107.5746,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":1.9913,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":239.8772,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":69.8184,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":249.8184,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"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":-547,"month":4,"day":22,"hour":6,"minute":30,"second":0,"calendar":"julian"},"julian_day":1521377.770833,"kali_year":2555,"ahargana":932912.2708,"sun":{"sidereal_longitude":42.1644,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":184.791,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":142.6266,"elapsed_within_tithi_degrees":10.6266},"nakshatra":{"number":14,"name":"Citrā","pada":4,"moon_longitude":184.791,"elapsed_within_degrees":11.4577},"yoga":{"number":18,"name":"Varīyān","sum_longitude":226.9554},"karana":{"half_tithi_index":23,"name":"Bālava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.079,"elongation":142.627},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.079,"opposition_distance":37.373}},"eclipse_window_40days":[]},"calendars":{"vikram_samvat":-490,"saka_samvat":-625,"bengali_samvat":-1140,"malayalam_era":-1371,"nanakshahi_year":-2016,"lunar_month":"Jyeṣṭha","lunar_month_paksha_full":"Jyeṣṭha Śukla Pakṣa","solar_month":"Vṛṣabha (Vaikāsi)","ritu":"Grīṣma (Summer)","display_summary":"Jyeṣṭha Śukla Dvādaśī · Vikram -490 undefined · Śaka -625 undefined"},"festivals":[{"id":"vrishabha-sankranti","name":"Vṛṣabha Saṅkrānti","name_sanskrit":"वृषभ सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Taurus.","vrata":false,"detection":{"sun_rashi":"Vṛṣabha"},"precedence":5}],"todays_walk":{"walk":{"id":"shani-walk","name":"Śani Walk","name_sanskrit":"शनि यात्रा","type":"graha","description":"Tapas + endurance + BG 17.14-19.","step_count":7,"url":"/walk/shani-walk"},"reason":"Śanivāra (Saturday) — 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 April 22, 548 BCE · Vidhyamitra","description":"Vedic pañchāṅga for April 22, 548 BCE: Śukla Dvādaśī · Citrā.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/day/-0547-04-22","hreflang_alternates":{"en":"https://vidhyamitra.com/day/-0547-04-22","sa":"https://sa.vidhyamitra.com/day/-0547-04-22","hi":"https://hi.vidhyamitra.com/day/-0547-04-22","x-default":"https://vidhyamitra.com/day/-0547-04-22"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-17T07:06:42.662Z","verification":{"type":"multi-marker","confidence":"canonical"}}],"meta":{"generated_at":"2026-05-17T07:06:42.662Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa"}}}