{"id":"vidhyamitra:city-day:erode:1981-05-17:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/erode/1981-05-17","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-05-17","date_display":"May 17, 1981 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":1981,"month":5,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444741.770833,"kali_year":5083,"ahargana":1856276.2708,"sun":{"sidereal_longitude":32.4819,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":190.456,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":14,"name":"Caturdaśī","paksha":"Śukla","full_name":"Śukla Caturdaśī","elongation_degrees":157.9741,"elapsed_within_tithi_degrees":1.9741},"nakshatra":{"number":15,"name":"Svātī","pada":2,"moon_longitude":190.456,"elapsed_within_degrees":3.7893},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":222.9378},"karana":{"half_tithi_index":26,"name":"Gara"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"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":1981,"month":5,"day":17,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444741.770833,"ahargana":1856276.2708,"kali_year":5083,"ayanamsa_lahiri":23.5928,"grahas":{"sun":{"sidereal_longitude":32.46864399999998,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":191.08174399999996,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":2},"retrograde":false,"latitude":4.4822},"mars":{"sidereal_longitude":22.769744000000003,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":52.35344399999997,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":157.19214399999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"venus":{"sidereal_longitude":43.10064399999999,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":159.47144400000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":105.5501,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":285.5501,"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":1981,"month":5,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444741.770833,"kali_year":5083,"ahargana":1856276.2708,"sun":{"sidereal_longitude":32.4819,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":190.456,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":14,"name":"Caturdaśī","paksha":"Śukla","full_name":"Śukla Caturdaśī","elongation_degrees":157.9741,"elapsed_within_tithi_degrees":1.9741},"nakshatra":{"number":15,"name":"Svātī","pada":2,"moon_longitude":190.456,"elapsed_within_degrees":3.7893},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":222.9378},"karana":{"half_tithi_index":26,"name":"Gara"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.482,"elongation":157.974},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.482,"opposition_distance":22.026}},"eclipse_window_40days":[]},"city":{"slug":"erode","name":"Erode, Tamil Nadu","lat":11.341,"lon":77.7172,"tz_offset_hours":5.5,"state":"Tamil Nadu","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"erode","name":"Erode, Tamil Nadu","lat":11.341,"lon":77.7172,"tz_offset_hours":5.5,"state":"Tamil Nadu","country":"IN","tier":"tier-1"},"sunriseLocal":"05:56","sunsetLocal":"18:35","solarNoonLocal":"12:15","dayLengthHours":12.65638461731416,"dayLengthDisplay":"12 Hours 39 Mins 23 Secs","nightLengthDisplay":"11 Hours 20 Mins 37 Secs","moonriseLocal":"16:58","moonsetLocal":"04:42","rahuKala":{"name":"Rāhu Kāla","start":"17:00","end":"18:35","startHours":17.002982904925926,"endHours":18.585030982090196,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:15","end":"13:50","startHours":12.256838673433116,"endHours":13.838886750597386,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:25","end":"17:00","startHours":15.420934827761656,"endHours":17.002982904925926,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:53","end":"09:18","startHours":8.881802775482674,"endHours":9.303682262726479,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:27","end":"06:48","startHours":6.455995723830793,"endHours":6.793499313625837,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:50","end":"12:41","startHours":11.83495918618931,"endHours":12.67871816067692,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:14","end":"05:05","startHours":4.241128415800816,"endHours":5.084887390288426,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:52","end":"05:56","startHours":4.873947646666523,"endHours":5.928646364776037,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:22","end":"15:13","startHours":14.366236109652142,"endHours":15.209995084139752,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:23","end":"18:47","startHours":18.385030982090196,"endHours":18.785030982090195,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:35","end":"19:07","startHours":18.585030982090196,"endHours":19.112380341144952,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:20","end":"20:05","startHours":18.335030982090196,"endHours":20.085030982090196,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:50","end":"00:41","startHours":23.83495918618931,"endHours":24.678718160676922,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:56","end":"07:31","startHours":5.928646364776037,"endHours":7.5106944419403066,"quality":"inauspicious"},{"name":"Chala","start":"07:31","end":"09:06","startHours":7.5106944419403066,"endHours":9.092742519104576,"quality":"neutral"},{"name":"Labha","start":"09:06","end":"10:40","startHours":9.092742519104576,"endHours":10.674790596268846,"quality":"auspicious"},{"name":"Amṛta","start":"10:40","end":"12:15","startHours":10.674790596268846,"endHours":12.256838673433116,"quality":"auspicious"},{"name":"Kāla","start":"12:15","end":"13:50","startHours":12.256838673433116,"endHours":13.838886750597386,"quality":"inauspicious"},{"name":"Śubha","start":"13:50","end":"15:25","startHours":13.838886750597386,"endHours":15.420934827761656,"quality":"auspicious"},{"name":"Roga","start":"15:25","end":"17:00","startHours":15.420934827761656,"endHours":17.002982904925926,"quality":"inauspicious"},{"name":"Udveg","start":"17:00","end":"18:35","startHours":17.002982904925926,"endHours":18.585030982090196,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:35","end":"20:00","startHours":18.585030982090196,"endHours":20.002982904925926,"quality":"auspicious"},{"name":"Roga","start":"20:00","end":"21:25","startHours":20.002982904925926,"endHours":21.420934827761656,"quality":"inauspicious"},{"name":"Udveg","start":"21:25","end":"22:50","startHours":21.420934827761656,"endHours":22.838886750597386,"quality":"inauspicious"},{"name":"Chala","start":"22:50","end":"00:15","startHours":22.838886750597386,"endHours":24.256838673433116,"quality":"neutral"},{"name":"Labha","start":"00:15","end":"01:40","startHours":24.256838673433116,"endHours":25.674790596268846,"quality":"auspicious"},{"name":"Amṛta","start":"01:40","end":"03:06","startHours":25.674790596268846,"endHours":27.092742519104576,"quality":"auspicious"},{"name":"Kāla","start":"03:06","end":"04:31","startHours":27.092742519104576,"endHours":28.510694441940306,"quality":"inauspicious"},{"name":"Śubha","start":"04:31","end":"05:56","startHours":28.510694441940306,"endHours":29.928646364776036,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:56","end":"06:56","startHours":5.928646364776037,"endHours":6.928646364776037,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:56","end":"07:56","startHours":6.928646364776037,"endHours":7.928646364776037,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:56","end":"08:56","startHours":7.928646364776037,"endHours":8.928646364776036,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:56","end":"09:56","startHours":8.928646364776036,"endHours":9.928646364776036,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:56","end":"10:56","startHours":9.928646364776036,"endHours":10.928646364776036,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:56","end":"11:56","startHours":10.928646364776036,"endHours":11.928646364776036,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:56","end":"12:56","startHours":11.928646364776036,"endHours":12.928646364776036,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:56","end":"13:56","startHours":12.928646364776036,"endHours":13.928646364776036,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:56","end":"14:56","startHours":13.928646364776036,"endHours":14.928646364776036,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:56","end":"15:56","startHours":14.928646364776036,"endHours":15.928646364776036,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:56","end":"16:56","startHours":15.928646364776036,"endHours":16.928646364776036,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:56","end":"17:56","startHours":16.928646364776036,"endHours":17.928646364776036,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:56","end":"18:56","startHours":17.928646364776036,"endHours":18.928646364776036,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:56","end":"19:56","startHours":18.928646364776036,"endHours":19.928646364776036,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:56","end":"20:56","startHours":19.928646364776036,"endHours":20.928646364776036,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:56","end":"21:56","startHours":20.928646364776036,"endHours":21.928646364776036,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:56","end":"22:56","startHours":21.928646364776036,"endHours":22.928646364776036,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:56","end":"23:56","startHours":22.928646364776036,"endHours":23.928646364776036,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:56","end":"00:56","startHours":23.928646364776036,"endHours":24.928646364776036,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:56","end":"01:56","startHours":24.928646364776036,"endHours":25.928646364776036,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:56","end":"02:56","startHours":25.928646364776036,"endHours":26.928646364776036,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:56","end":"03:56","startHours":26.928646364776036,"endHours":27.928646364776036,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:56","end":"04:56","startHours":27.928646364776036,"endHours":28.928646364776036,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:56","end":"05:56","startHours":28.928646364776036,"endHours":29.928646364776036,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Punarvasu","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Uttara Phalgunī","Hasta","Citrā","Svātī","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Karka","Siṃha","Tulā","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Vṛścika","Makara","Kumbha"]},"dishaShool":"West (Paścim)","chandraVasa":"North","rahuVasa":"North-East","anandadiYoga":{"name":"Lumba","quality":"Auspicious"},"drikRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":19.267165607125545,"eotMinutes":3.7208795940131294,"ayanamsa":23.5928}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Jyeṣṭha","lunar_month_paksha_full":"Jyeṣṭha Śukla Pakṣa","solar_month":"Vṛṣabha (Vaikāsi)","ritu":"Grīṣma (Summer)","display_summary":"Jyeṣṭha Śukla Caturdaśī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"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":"surya-walk","name":"Sūrya Walk","name_sanskrit":"सूर्य यात्रा","type":"graha","description":"Self-illumination + BG 4.1 (Sun-lineage of Gītā transmission).","step_count":6,"url":"/walk/surya-walk"},"reason":"Ravivāra (Sunday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"erode"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga May 17, 1981 CE · Erode, Tamil Nadu · Vidhyamitra","description":"May 17, 1981 CE for Erode, Tamil Nadu: Śukla Caturdaśī, sūryodaya 05:56, sūryāsta 18:35.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/erode/1981-05-17","hreflang_alternates":{"en":"https://vidhyamitra.com/city/erode/1981-05-17","sa":"https://sa.vidhyamitra.com/city/erode/1981-05-17","hi":"https://hi.vidhyamitra.com/city/erode/1981-05-17","x-default":"https://vidhyamitra.com/city/erode/1981-05-17"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T08:32:29.697Z","verification":{"type":"multi-marker","confidence":"canonical"}},{"pillar":"Vidhyamitra-Tier2","pillar_version":"0.1.0","method":"Spherical astronomy + Lahiri ayanamsa + standard solar declination + EoT correction","retrieved_at":"2026-05-18T08:32:29.697Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T08:32:29.697Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}