{"id":"vidhyamitra:city-day:erode:1981-10-17:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/erode/1981-10-17","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-10-17","date_display":"October 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":10,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444894.770833,"kali_year":5083,"ahargana":1856429.2708,"sun":{"sidereal_longitude":179.3018,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":45.1454,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":225.8436,"elapsed_within_tithi_degrees":9.8436},"nakshatra":{"number":4,"name":"Rohiṇī","pada":2,"moon_longitude":45.1454,"elapsed_within_degrees":5.1454},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":224.4472},"karana":{"half_tithi_index":37,"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":1981,"month":10,"day":17,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444894.770833,"ahargana":1856429.2708,"kali_year":5083,"ayanamsa_lahiri":23.5987,"grahas":{"sun":{"sidereal_longitude":179.98769800000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":48.89519799999999,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":3},"retrograde":false,"latitude":-3.559},"mars":{"sidereal_longitude":124.27919800000001,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":183.57299799999998,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":4},"retrograde":true},"jupiter":{"sidereal_longitude":178.13579800000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":225.71159799999998,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":170.258198,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":97.4435,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":277.4435,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"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":10,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444894.770833,"kali_year":5083,"ahargana":1856429.2708,"sun":{"sidereal_longitude":179.3018,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":45.1454,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":225.8436,"elapsed_within_tithi_degrees":9.8436},"nakshatra":{"number":4,"name":"Rohiṇī","pada":2,"moon_longitude":45.1454,"elapsed_within_degrees":5.1454},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":224.4472},"karana":{"half_tithi_index":37,"name":"Bālava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.559,"elongation":134.156},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.559,"opposition_distance":45.844}},"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":"06:08","sunsetLocal":"18:00","solarNoonLocal":"12:04","dayLengthHours":11.867740636287536,"dayLengthDisplay":"11 Hours 52 Mins 04 Secs","nightLengthDisplay":"12 Hours 07 Mins 56 Secs","moonriseLocal":"20:58","moonsetLocal":"09:41","rahuKala":{"name":"Rāhu Kāla","start":"09:06","end":"10:35","startHours":9.098127848227652,"endHours":10.581595427763592,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:33","end":"15:02","startHours":13.548530586835476,"endHours":15.03199816637142,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:08","end":"07:37","startHours":6.131192689155767,"endHours":7.614660268691709,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:54","end":"09:18","startHours":8.900332170956192,"endHours":9.29592352549911,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:38","end":"06:57","startHours":6.625681882334414,"endHours":6.942154965968748,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:40","end":"12:28","startHours":11.669471652756618,"endHours":12.460654361842453,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:33","end":"05:20","startHours":4.548827270984095,"endHours":5.340009980069931,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:09","end":"06:08","startHours":5.142214302798472,"endHours":6.131192689155767,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:03","end":"14:50","startHours":14.043019780014124,"endHours":14.83420248909996,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:48","end":"18:12","startHours":17.798933325443304,"endHours":18.198933325443303,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:00","end":"18:30","startHours":17.998933325443303,"endHours":18.49342251862195,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:45","end":"19:30","startHours":17.748933325443303,"endHours":19.498933325443303,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:40","end":"00:28","startHours":23.669471652756616,"endHours":24.460654361842455,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"06:08","end":"07:37","startHours":6.131192689155767,"endHours":7.614660268691709,"quality":"inauspicious"},{"name":"Śubha","start":"07:37","end":"09:06","startHours":7.614660268691709,"endHours":9.098127848227652,"quality":"auspicious"},{"name":"Roga","start":"09:06","end":"10:35","startHours":9.098127848227652,"endHours":10.581595427763592,"quality":"inauspicious"},{"name":"Udveg","start":"10:35","end":"12:04","startHours":10.581595427763592,"endHours":12.065063007299536,"quality":"inauspicious"},{"name":"Chala","start":"12:04","end":"13:33","startHours":12.065063007299536,"endHours":13.548530586835476,"quality":"neutral"},{"name":"Labha","start":"13:33","end":"15:02","startHours":13.548530586835476,"endHours":15.03199816637142,"quality":"auspicious"},{"name":"Amṛta","start":"15:02","end":"16:31","startHours":15.03199816637142,"endHours":16.51546574590736,"quality":"auspicious"},{"name":"Kāla","start":"16:31","end":"18:00","startHours":16.51546574590736,"endHours":17.998933325443303,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:00","end":"19:31","startHours":17.998933325443303,"endHours":19.515465745907363,"quality":"auspicious"},{"name":"Amṛta","start":"19:31","end":"21:02","startHours":19.515465745907363,"endHours":21.03199816637142,"quality":"auspicious"},{"name":"Kāla","start":"21:02","end":"22:33","startHours":21.03199816637142,"endHours":22.548530586835476,"quality":"inauspicious"},{"name":"Śubha","start":"22:33","end":"00:04","startHours":22.548530586835476,"endHours":24.065063007299536,"quality":"auspicious"},{"name":"Roga","start":"00:04","end":"01:35","startHours":24.065063007299536,"endHours":25.581595427763595,"quality":"inauspicious"},{"name":"Udveg","start":"01:35","end":"03:06","startHours":25.581595427763595,"endHours":27.09812784822765,"quality":"inauspicious"},{"name":"Chala","start":"03:06","end":"04:37","startHours":27.09812784822765,"endHours":28.614660268691708,"quality":"neutral"},{"name":"Labha","start":"04:37","end":"06:08","startHours":28.614660268691708,"endHours":30.131192689155768,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:08","end":"07:08","startHours":6.131192689155767,"endHours":7.131192689155767,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"07:08","end":"08:08","startHours":7.131192689155767,"endHours":8.131192689155768,"planetary_lord":"Moon"},{"name":"Hora 3","start":"08:08","end":"09:08","startHours":8.131192689155768,"endHours":9.131192689155768,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"09:08","end":"10:08","startHours":9.131192689155768,"endHours":10.131192689155768,"planetary_lord":"Venus"},{"name":"Hora 5","start":"10:08","end":"11:08","startHours":10.131192689155768,"endHours":11.131192689155768,"planetary_lord":"Sun"},{"name":"Hora 6","start":"11:08","end":"12:08","startHours":11.131192689155768,"endHours":12.131192689155768,"planetary_lord":"Mars"},{"name":"Hora 7","start":"12:08","end":"13:08","startHours":12.131192689155768,"endHours":13.131192689155768,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"13:08","end":"14:08","startHours":13.131192689155768,"endHours":14.131192689155768,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"14:08","end":"15:08","startHours":14.131192689155768,"endHours":15.131192689155768,"planetary_lord":"Moon"},{"name":"Hora 10","start":"15:08","end":"16:08","startHours":15.131192689155768,"endHours":16.131192689155768,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"16:08","end":"17:08","startHours":16.131192689155768,"endHours":17.131192689155768,"planetary_lord":"Venus"},{"name":"Hora 12","start":"17:08","end":"18:08","startHours":17.131192689155768,"endHours":18.131192689155768,"planetary_lord":"Sun"},{"name":"Hora 13","start":"18:08","end":"19:08","startHours":18.131192689155768,"endHours":19.131192689155768,"planetary_lord":"Mars"},{"name":"Hora 14","start":"19:08","end":"20:08","startHours":19.131192689155768,"endHours":20.131192689155768,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"20:08","end":"21:08","startHours":20.131192689155768,"endHours":21.131192689155768,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"21:08","end":"22:08","startHours":21.131192689155768,"endHours":22.131192689155768,"planetary_lord":"Moon"},{"name":"Hora 17","start":"22:08","end":"23:08","startHours":22.131192689155768,"endHours":23.131192689155768,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"23:08","end":"00:08","startHours":23.131192689155768,"endHours":24.131192689155768,"planetary_lord":"Venus"},{"name":"Hora 19","start":"00:08","end":"01:08","startHours":24.131192689155768,"endHours":25.131192689155768,"planetary_lord":"Sun"},{"name":"Hora 20","start":"01:08","end":"02:08","startHours":25.131192689155768,"endHours":26.131192689155768,"planetary_lord":"Mars"},{"name":"Hora 21","start":"02:08","end":"03:08","startHours":26.131192689155768,"endHours":27.131192689155768,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"03:08","end":"04:08","startHours":27.131192689155768,"endHours":28.131192689155768,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"04:08","end":"05:08","startHours":28.131192689155768,"endHours":29.131192689155768,"planetary_lord":"Moon"},{"name":"Hora 24","start":"05:08","end":"06:08","startHours":29.131192689155768,"endHours":30.131192689155768,"planetary_lord":"Mercury"}],"taraBala":{"favorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Citrā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Karka","Tulā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Siṃha","Kanyā","Dhanu","Makara"]},"dishaShool":"East (Pūrva)","chandraVasa":"South-East","rahuVasa":"East","anandadiYoga":{"name":"Dhātṛ","quality":"Auspicious"},"drikRitu":"Śarad (Autumn) (Drik)","vedicRitu":"Varṣā (Monsoon)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-9.157288544894131,"eotMinutes":15.227419562027912,"ayanamsa":23.5987}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Āśvina","lunar_month_paksha_full":"Āśvina Kṛṣṇa Pakṣa","solar_month":"Kanyā (Puraṭṭāsi)","ritu":"Śarad (Autumn)","display_summary":"Āśvina Kṛṣṇa Caturthī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"kanya-sankranti","name":"Kanyā Saṅkrānti (Mahālaya begins)","name_sanskrit":"कन्या सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Virgo; Mahālaya / Pitṛ-Pakṣa solar marker.","vrata":false,"detection":{"sun_rashi":"Kanyā"},"precedence":4},{"id":"sankashti-chaturthi","name":"Saṅkaṣṭī Caturthī","name_sanskrit":"सङ्कष्टी चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Gaṇeśa vrata.","vrata":true,"detection":{"tithi_number":19,"tithi_paksha":"Kṛṣṇa"},"precedence":6}],"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":[{"historical_date":"-3226-07-09","event":"Bhagavān Krishna's birth at Mathurā","chart_id":"krishna","shared_marker":"same Rohiṇī","url":"/day/-3226-07-09","relevance":0.5}]},"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 October 17, 1981 CE · Erode, Tamil Nadu · Vidhyamitra","description":"October 17, 1981 CE for Erode, Tamil Nadu: Kṛṣṇa Caturthī, sūryodaya 06:08, sūryāsta 18:00.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/erode/1981-10-17","hreflang_alternates":{"en":"https://vidhyamitra.com/city/erode/1981-10-17","sa":"https://sa.vidhyamitra.com/city/erode/1981-10-17","hi":"https://hi.vidhyamitra.com/city/erode/1981-10-17","x-default":"https://vidhyamitra.com/city/erode/1981-10-17"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T15:32:35.834Z","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":"2026-05-18T15:32:35.834Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T15:32:35.834Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}