{"id":"vidhyamitra:day:2280-05-11:en","page_class":"VM-1-day","url":"https://vidhyamitra.com/day/2280-05-11","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2280-05-11","date_display":"May 11, 2280 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":2280,"month":5,"day":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2553943.770833,"kali_year":5382,"ahargana":1965478.2708,"sun":{"sidereal_longitude":22.53,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":150.2906,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":127.7606,"elapsed_within_tithi_degrees":7.7606},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2,"moon_longitude":150.2906,"elapsed_within_degrees":3.624},"yoga":{"number":13,"name":"Vyāghāta","sum_longitude":172.8206},"karana":{"half_tithi_index":21,"name":"Viṣṭi"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"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":2280,"month":5,"day":11,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2553943.770833,"ahargana":1965478.2708,"kali_year":5382,"ayanamsa_lahiri":27.7694,"grahas":{"sun":{"sidereal_longitude":23.161224000000004,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3},"retrograde":false},"moon":{"sidereal_longitude":151.458324,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false,"latitude":4.2489},"mars":{"sidereal_longitude":5.09542399999998,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":356.786524,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":236.96952399999998,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":true},"venus":{"sidereal_longitude":31.773724000000016,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":214.78182400000003,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":79.5027,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":259.5027,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","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":2280,"month":5,"day":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2553943.770833,"kali_year":5382,"ahargana":1965478.2708,"sun":{"sidereal_longitude":22.53,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":150.2906,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":127.7606,"elapsed_within_tithi_degrees":7.7606},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2,"moon_longitude":150.2906,"elapsed_within_degrees":3.624},"yoga":{"number":13,"name":"Vyāghāta","sum_longitude":172.8206},"karana":{"half_tithi_index":21,"name":"Viṣṭi"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.249,"elongation":127.761},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.249,"opposition_distance":52.239}},"eclipse_window_40days":[]},"calendars":{"vikram_samvat":2337,"vikram_samvatsara":"Śrīmukha","saka_samvat":2202,"saka_samvatsara":"Raudra","bengali_samvat":1687,"malayalam_era":1456,"nanakshahi_year":811,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Vaiśākha","lunar_month_amanta":"Vaiśākha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha Śukla Ekādaśī · Vikram 2337 Śrīmukha · Śaka 2202 Raudra"},"festivals":[{"id":"mohini-ekadashi","name":"Mohinī Ekādaśī","name_sanskrit":"मोहिनी एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu (Mohinī form)","significance":"Mohinī-form of Viṣṇu deceived asuras during samudra-mathana for amṛta.","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":3,"sources":["Bhāgavata 8.9"]},{"id":"ekadashi","name":"Ekādaśī","name_sanskrit":"एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Sacred to Bhagavān Viṣṇu; vrata for purification.","vrata":true,"detection":{"any_of":[{"tithi_number":11},{"tithi_number":26}]},"precedence":5}],"todays_walk":{"walk":{"id":"mangala-walk","name":"Maṅgala Walk","name_sanskrit":"मङ्गल यात्रा","type":"graha","description":"Right action + BG 2.31-38 (kṣatriya-dharma).","step_count":7,"url":"/walk/mangala-walk"},"reason":"Maṅgalavāra (Tuesday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"valid_from":"2280-05-11T00:00:00Z"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate; Vidhyamitra substrate"},"seo":{"title":"Pañchāṅga May 11, 2280 CE · Vidhyamitra","description":"Vedic pañchāṅga for May 11, 2280 CE: Śukla Ekādaśī · Uttara Phalgunī.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/day/2280-05-11","hreflang_alternates":{"en":"https://vidhyamitra.com/day/2280-05-11","sa":"https://sa.vidhyamitra.com/day/2280-05-11","hi":"https://hi.vidhyamitra.com/day/2280-05-11","x-default":"https://vidhyamitra.com/day/2280-05-11"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T21:41:19.847Z","verification":{"type":"multi-marker","confidence":"canonical"}}],"meta":{"generated_at":"2026-05-31T21:41:19.847Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa"}}}