{"id":"vidhyamitra:day:1671-04-10:en","page_class":"VM-1-day","url":"https://vidhyamitra.com/day/1671-04-10","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1671-04-10","date_display":"April 10, 1671 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":1671,"month":4,"day":10,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2331479.770833,"kali_year":4772,"ahargana":1743014.2708,"sun":{"sidereal_longitude":1.7839,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":9.529,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":1,"name":"Pratipada","paksha":"Śukla","full_name":"Śukla Pratipada","elongation_degrees":7.7451,"elapsed_within_tithi_degrees":7.7451},"nakshatra":{"number":1,"name":"Aśvinī","pada":3,"moon_longitude":9.529,"elapsed_within_degrees":9.529},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":11.3129},"karana":{"half_tithi_index":1,"name":"Bava"},"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":1671,"month":4,"day":10,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2331479.770833,"ahargana":1743014.2708,"kali_year":4772,"ayanamsa_lahiri":19.261,"grahas":{"sun":{"sidereal_longitude":0.8921849999999836,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":9.322585000000004,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":3},"retrograde":false,"latitude":1.7432},"mars":{"sidereal_longitude":44.385785,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":340.586185,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":112.52938499999999,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":20.434084999999982,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":329.73088499999994,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":346.716,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":166.716,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","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":1671,"month":4,"day":10,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2331479.770833,"kali_year":4772,"ahargana":1743014.2708,"sun":{"sidereal_longitude":1.7839,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":9.529,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":1,"name":"Pratipada","paksha":"Śukla","full_name":"Śukla Pratipada","elongation_degrees":7.7451,"elapsed_within_tithi_degrees":7.7451},"nakshatra":{"number":1,"name":"Aśvinī","pada":3,"moon_longitude":9.529,"elapsed_within_degrees":9.529},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":11.3129},"karana":{"half_tithi_index":1,"name":"Bava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.743,"elongation":7.745},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.743,"opposition_distance":172.255}},"eclipse_window_40days":[]},"calendars":{"vikram_samvat":1728,"vikram_samvatsara":"Raktākṣī","saka_samvat":1593,"saka_samvatsara":"Virodhakṛt","bengali_samvat":1078,"malayalam_era":847,"nanakshahi_year":202,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha (Adhika) Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Vaiśākha","lunar_month_amanta":"Vaiśākha","lunar_month_is_adhika":true,"lunar_month_purnimanta_is_adhika":true,"lunar_month_amanta_is_adhika":true,"solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha (Adhika) Śukla Pratipada · Vikram 1728 Raktākṣī · Śaka 1593 Virodhakṛt"},"festivals":[],"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":[{"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":"1671-04-10T00:00:00Z"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate; Vidhyamitra substrate"},"seo":{"title":"Pañchāṅga April 10, 1671 CE · Vidhyamitra","description":"Vedic pañchāṅga for April 10, 1671 CE: Śukla Pratipada · Aśvinī.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/day/1671-04-10","hreflang_alternates":{"en":"https://vidhyamitra.com/day/1671-04-10","sa":"https://sa.vidhyamitra.com/day/1671-04-10","hi":"https://hi.vidhyamitra.com/day/1671-04-10","x-default":"https://vidhyamitra.com/day/1671-04-10"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-04T20:51:38.924Z","verification":{"type":"multi-marker","confidence":"canonical"}}],"meta":{"generated_at":"2026-06-04T20:51:38.924Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa"}}}