{"id":"vidhyamitra:day:1721-02-15:en","page_class":"VM-1-day","url":"https://vidhyamitra.com/day/1721-02-15","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1721-02-15","date_display":"February 15, 1721 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":1721,"month":2,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2349687.770833,"kali_year":4822,"ahargana":1761222.2708,"sun":{"sidereal_longitude":307.1654,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":159.9033,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":18,"name":"Tṛtīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Tṛtīyā","elongation_degrees":212.7379,"elapsed_within_tithi_degrees":8.7379},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4,"moon_longitude":159.9033,"elapsed_within_degrees":13.2366},"yoga":{"number":9,"name":"Śūla","sum_longitude":107.0687},"karana":{"half_tithi_index":35,"name":"Viṣṭi"},"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":1721,"month":2,"day":15,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2349687.770833,"ahargana":1761222.2708,"kali_year":4822,"ayanamsa_lahiri":19.9573,"grahas":{"sun":{"sidereal_longitude":306.401205,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":158.99700499999994,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false,"latitude":3.8124},"mars":{"sidereal_longitude":259.05450500000006,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":296.355405,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":198.94940500000007,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":4},"retrograde":false},"venus":{"sidereal_longitude":350.365305,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":229.945205,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":101.9685,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":281.9685,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":1721,"month":2,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2349687.770833,"kali_year":4822,"ahargana":1761222.2708,"sun":{"sidereal_longitude":307.1654,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":159.9033,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":18,"name":"Tṛtīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Tṛtīyā","elongation_degrees":212.7379,"elapsed_within_tithi_degrees":8.7379},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4,"moon_longitude":159.9033,"elapsed_within_degrees":13.2366},"yoga":{"number":9,"name":"Śūla","sum_longitude":107.0687},"karana":{"half_tithi_index":35,"name":"Viṣṭi"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.812,"elongation":147.262},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.812,"opposition_distance":32.738}},"eclipse_window_40days":[]},"calendars":{"vikram_samvat":1778,"vikram_samvatsara":"Ānanda","saka_samvat":1643,"saka_samvatsara":"Plava","bengali_samvat":1128,"malayalam_era":897,"nanakshahi_year":252,"lunar_month":"Phālguna","lunar_month_paksha_full":"Phālguna Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Phālguna","lunar_month_amanta":"Māgha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Kumbha (Māsi)","ritu":"Śiśira (Winter)","display_summary":"Phālguna Kṛṣṇa Tṛtīyā · Vikram 1778 Ānanda · Śaka 1643 Plava"},"festivals":[],"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":false,"valid_from":"1721-02-15T00:00:00Z"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate; Vidhyamitra substrate"},"seo":{"title":"Pañchāṅga February 15, 1721 CE · Vidhyamitra","description":"Vedic pañchāṅga for February 15, 1721 CE: Kṛṣṇa Tṛtīyā · Uttara Phalgunī.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/day/1721-02-15","hreflang_alternates":{"en":"https://vidhyamitra.com/day/1721-02-15","sa":"https://sa.vidhyamitra.com/day/1721-02-15","hi":"https://hi.vidhyamitra.com/day/1721-02-15","x-default":"https://vidhyamitra.com/day/1721-02-15"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T08:01:51.048Z","verification":{"type":"multi-marker","confidence":"canonical"}}],"meta":{"generated_at":"2026-06-01T08:01:51.048Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa"}}}