{"id":"vidhyamitra:city-day:erode:1981-02-06:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/erode/1981-02-06","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-02-06","date_display":"February 6, 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":2,"day":6,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444641.770833,"kali_year":5082,"ahargana":1856176.2708,"sun":{"sidereal_longitude":293.6755,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":306.5812,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":2,"name":"Dvitīyā","paksha":"Śukla","full_name":"Śukla Dvitīyā","elongation_degrees":12.9057,"elapsed_within_tithi_degrees":0.9057},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4,"moon_longitude":306.5812,"elapsed_within_degrees":13.2479},"yoga":{"number":19,"name":"Parigha","sum_longitude":240.2567},"karana":{"half_tithi_index":2,"name":"Bālava"},"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":1981,"month":2,"day":6,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444641.770833,"ahargana":1856176.2708,"kali_year":5082,"ayanamsa_lahiri":23.589,"grahas":{"sun":{"sidereal_longitude":293.580464,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":307.932764,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":false,"latitude":-1.219},"mars":{"sidereal_longitude":305.99146399999995,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":311.09426400000007,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":166.61786400000005,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"venus":{"sidereal_longitude":278.93306400000006,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":165.67296399999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":110.8486,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":290.8486,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":2,"day":6,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444641.770833,"kali_year":5082,"ahargana":1856176.2708,"sun":{"sidereal_longitude":293.6755,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":306.5812,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":2,"name":"Dvitīyā","paksha":"Śukla","full_name":"Śukla Dvitīyā","elongation_degrees":12.9057,"elapsed_within_tithi_degrees":0.9057},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4,"moon_longitude":306.5812,"elapsed_within_degrees":13.2479},"yoga":{"number":19,"name":"Parigha","sum_longitude":240.2567},"karana":{"half_tithi_index":2,"name":"Bālava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-1.219,"elongation":12.906},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-1.219,"opposition_distance":167.094}},"eclipse_window_40days":[{"offset_days":-17,"type":"lunar","occurs":true,"moon_latitude":-1.332,"opposition_distance":1.776},{"offset_days":-1,"type":"solar","occurs":true,"moon_latitude":-0.15,"elongation":0.162}]},"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":"06:43","sunsetLocal":"18:24","solarNoonLocal":"12:33","dayLengthHours":11.687248034378324,"dayLengthDisplay":"11 Hours 41 Mins 14 Secs","nightLengthDisplay":"12 Hours 18 Mins 46 Secs","moonriseLocal":"07:37","moonsetLocal":"19:24","rahuKala":{"name":"Rāhu Kāla","start":"11:06","end":"12:33","startHours":11.096202880993996,"endHours":12.557108885291289,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"15:29","end":"16:56","startHours":15.478920893885867,"endHours":16.93982689818316,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"08:10","end":"09:38","startHours":8.174390872399416,"endHours":9.635296876696707,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:26","end":"09:50","startHours":9.440509409457068,"endHours":9.830084343936345,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:12","end":"07:31","startHours":7.2004535362012225,"endHours":7.512113483784645,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:10","end":"12:57","startHours":12.16753395081201,"endHours":12.946683819770564,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:09","end":"05:56","startHours":5.155185130185016,"endHours":5.93433499914357,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:44","end":"06:43","startHours":5.7395475319039315,"endHours":6.7134848681021255,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:30","end":"15:17","startHours":14.504983557687677,"endHours":15.284133426646232,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:12","end":"18:36","startHours":18.20073290248045,"endHours":18.60073290248045,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:24","end":"18:53","startHours":18.40073290248045,"endHours":18.887701570579544,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:09","end":"19:54","startHours":18.15073290248045,"endHours":19.90073290248045,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:10","end":"00:57","startHours":24.167533950812008,"endHours":24.946683819770563,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"06:43","end":"08:10","startHours":6.7134848681021255,"endHours":8.174390872399416,"quality":"neutral"},{"name":"Labha","start":"08:10","end":"09:38","startHours":8.174390872399416,"endHours":9.635296876696707,"quality":"auspicious"},{"name":"Amṛta","start":"09:38","end":"11:06","startHours":9.635296876696707,"endHours":11.096202880993996,"quality":"auspicious"},{"name":"Kāla","start":"11:06","end":"12:33","startHours":11.096202880993996,"endHours":12.557108885291289,"quality":"inauspicious"},{"name":"Śubha","start":"12:33","end":"14:01","startHours":12.557108885291289,"endHours":14.018014889588578,"quality":"auspicious"},{"name":"Roga","start":"14:01","end":"15:29","startHours":14.018014889588578,"endHours":15.478920893885867,"quality":"inauspicious"},{"name":"Udveg","start":"15:29","end":"16:56","startHours":15.478920893885867,"endHours":16.93982689818316,"quality":"inauspicious"},{"name":"Chala","start":"16:56","end":"18:24","startHours":16.93982689818316,"endHours":18.40073290248045,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"18:24","end":"19:56","startHours":18.40073290248045,"endHours":19.93982689818316,"quality":"inauspicious"},{"name":"Udveg","start":"19:56","end":"21:29","startHours":19.93982689818316,"endHours":21.478920893885867,"quality":"inauspicious"},{"name":"Chala","start":"21:29","end":"23:01","startHours":21.478920893885867,"endHours":23.018014889588578,"quality":"neutral"},{"name":"Labha","start":"23:01","end":"00:33","startHours":23.018014889588578,"endHours":24.557108885291285,"quality":"auspicious"},{"name":"Amṛta","start":"00:33","end":"02:06","startHours":24.557108885291285,"endHours":26.096202880993996,"quality":"auspicious"},{"name":"Kāla","start":"02:06","end":"03:38","startHours":26.096202880993996,"endHours":27.635296876696707,"quality":"inauspicious"},{"name":"Śubha","start":"03:38","end":"05:10","startHours":27.635296876696707,"endHours":29.174390872399414,"quality":"auspicious"},{"name":"Roga","start":"05:10","end":"06:43","startHours":29.174390872399414,"endHours":30.713484868102125,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:43","end":"07:43","startHours":6.7134848681021255,"endHours":7.7134848681021255,"planetary_lord":"Venus"},{"name":"Hora 2","start":"07:43","end":"08:43","startHours":7.7134848681021255,"endHours":8.713484868102125,"planetary_lord":"Sun"},{"name":"Hora 3","start":"08:43","end":"09:43","startHours":8.713484868102125,"endHours":9.713484868102125,"planetary_lord":"Mars"},{"name":"Hora 4","start":"09:43","end":"10:43","startHours":9.713484868102125,"endHours":10.713484868102125,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"10:43","end":"11:43","startHours":10.713484868102125,"endHours":11.713484868102125,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"11:43","end":"12:43","startHours":11.713484868102125,"endHours":12.713484868102125,"planetary_lord":"Moon"},{"name":"Hora 7","start":"12:43","end":"13:43","startHours":12.713484868102125,"endHours":13.713484868102125,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"13:43","end":"14:43","startHours":13.713484868102125,"endHours":14.713484868102125,"planetary_lord":"Venus"},{"name":"Hora 9","start":"14:43","end":"15:43","startHours":14.713484868102125,"endHours":15.713484868102125,"planetary_lord":"Sun"},{"name":"Hora 10","start":"15:43","end":"16:43","startHours":15.713484868102125,"endHours":16.713484868102125,"planetary_lord":"Mars"},{"name":"Hora 11","start":"16:43","end":"17:43","startHours":16.713484868102125,"endHours":17.713484868102125,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"17:43","end":"18:43","startHours":17.713484868102125,"endHours":18.713484868102125,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"18:43","end":"19:43","startHours":18.713484868102125,"endHours":19.713484868102125,"planetary_lord":"Moon"},{"name":"Hora 14","start":"19:43","end":"20:43","startHours":19.713484868102125,"endHours":20.713484868102125,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"20:43","end":"21:43","startHours":20.713484868102125,"endHours":21.713484868102125,"planetary_lord":"Venus"},{"name":"Hora 16","start":"21:43","end":"22:43","startHours":21.713484868102125,"endHours":22.713484868102125,"planetary_lord":"Sun"},{"name":"Hora 17","start":"22:43","end":"23:43","startHours":22.713484868102125,"endHours":23.713484868102125,"planetary_lord":"Mars"},{"name":"Hora 18","start":"23:43","end":"00:43","startHours":23.713484868102125,"endHours":24.713484868102125,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"00:43","end":"01:43","startHours":24.713484868102125,"endHours":25.713484868102125,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"01:43","end":"02:43","startHours":25.713484868102125,"endHours":26.713484868102125,"planetary_lord":"Moon"},{"name":"Hora 21","start":"02:43","end":"03:43","startHours":26.713484868102125,"endHours":27.713484868102125,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"03:43","end":"04:43","startHours":27.713484868102125,"endHours":28.713484868102125,"planetary_lord":"Venus"},{"name":"Hora 23","start":"04:43","end":"05:43","startHours":28.713484868102125,"endHours":29.713484868102125,"planetary_lord":"Sun"},{"name":"Hora 24","start":"05:43","end":"06:43","startHours":29.713484868102125,"endHours":30.713484868102125,"planetary_lord":"Mars"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Maghā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Dhanu","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Tulā","Makara","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"South","rahuVasa":"South-East","anandadiYoga":{"name":"Lumba","quality":"Auspicious"},"drikRitu":"Śiśira (Winter) (Drik)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-15.68755605604244,"eotMinutes":-14.295333117477217,"ayanamsa":23.589}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Śukla Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Śukla Dvitīyā · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"makara-sankranti","name":"Makara Saṅkrānti (Uttarāyaṇa)","name_sanskrit":"मकर सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Capricorn; Uttarāyaṇa (north-going) begins. Bhīṣma's chosen mahaprasthāna time.","vrata":true,"detection":{"sun_rashi":"Makara"},"precedence":1,"sources":["Mahābhārata Bhīṣma-Stuti","Sūrya-Siddhānta"]},{"id":"pongal","name":"Pongal / Thai Pongal","name_sanskrit":"पोङ्गल","tradition":"Regional","associated_deity":"Sūrya Bhagavān","significance":"Tamil 4-day harvest festival; coincides with Makara Saṅkrānti.","vrata":false,"detection":{"sun_rashi":"Makara"},"precedence":2}],"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":[]},"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 February 6, 1981 CE · Erode, Tamil Nadu · Vidhyamitra","description":"February 6, 1981 CE for Erode, Tamil Nadu: Śukla Dvitīyā, sūryodaya 06:43, sūryāsta 18:24.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/erode/1981-02-06","hreflang_alternates":{"en":"https://vidhyamitra.com/city/erode/1981-02-06","sa":"https://sa.vidhyamitra.com/city/erode/1981-02-06","hi":"https://hi.vidhyamitra.com/city/erode/1981-02-06","x-default":"https://vidhyamitra.com/city/erode/1981-02-06"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T13:00:34.907Z","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":"2026-05-18T13:00:34.907Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T13:00:34.907Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}