{"id":"vidhyamitra:city-day:erode:1981-01-10:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/erode/1981-01-10","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-01-10","date_display":"January 10, 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":1,"day":10,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444614.770833,"kali_year":5082,"ahargana":1856149.2708,"sun":{"sidereal_longitude":266.0202,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":312.02,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":45.9998,"elapsed_within_tithi_degrees":9.9998},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2,"moon_longitude":312.02,"elapsed_within_degrees":5.3533},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":218.0402},"karana":{"half_tithi_index":7,"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":1981,"month":1,"day":10,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444614.770833,"ahargana":1856149.2708,"kali_year":5082,"ayanamsa_lahiri":23.5879,"grahas":{"sun":{"sidereal_longitude":266.127696,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":312.226496,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"retrograde":false,"latitude":-1.5186},"mars":{"sidereal_longitude":284.673896,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":272.36079600000005,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":166.503196,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"venus":{"sidereal_longitude":245.12879599999997,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":165.891296,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":112.2792,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":292.2792,"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":1,"day":10,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444614.770833,"kali_year":5082,"ahargana":1856149.2708,"sun":{"sidereal_longitude":266.0202,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":312.02,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":45.9998,"elapsed_within_tithi_degrees":9.9998},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2,"moon_longitude":312.02,"elapsed_within_degrees":5.3533},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":218.0402},"karana":{"half_tithi_index":7,"name":"Viṣṭi"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-1.519,"elongation":46},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-1.519,"opposition_distance":134}},"eclipse_window_40days":[{"offset_days":10,"type":"lunar","occurs":true,"moon_latitude":-1.332,"opposition_distance":1.776}]},"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":"06:42","sunsetLocal":"18:12","solarNoonLocal":"12:27","dayLengthHours":11.503127453035162,"dayLengthDisplay":"11 Hours 30 Mins 11 Secs","nightLengthDisplay":"12 Hours 29 Mins 49 Secs","moonriseLocal":"09:36","moonsetLocal":"21:26","rahuKala":{"name":"Rāhu Kāla","start":"09:34","end":"11:00","startHours":9.568060200483977,"endHours":11.005951132113374,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:53","end":"15:19","startHours":13.881732995372165,"endHours":15.319623927001558,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:42","end":"08:08","startHours":6.692278337225187,"endHours":8.130169268854583,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:23","end":"09:46","startHours":9.376341409600059,"endHours":9.759778991367897,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:10","end":"07:29","startHours":7.171575314434985,"endHours":7.478325379849257,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:04","end":"12:50","startHours":12.06040448197493,"endHours":12.827279645510606,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:10","end":"05:56","startHours":5.158528010153832,"endHours":5.92540317368951,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:44","end":"06:42","startHours":5.73368438280559,"endHours":6.692278337225187,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:22","end":"15:08","startHours":14.361029972581964,"endHours":15.127905136117642,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:00","end":"18:24","startHours":17.99540579026035,"endHours":18.395405790260348,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:12","end":"18:40","startHours":18.19540579026035,"endHours":18.674702767470148,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:57","end":"19:42","startHours":17.94540579026035,"endHours":19.69540579026035,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:04","end":"00:50","startHours":24.060404481974928,"endHours":24.827279645510608,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"06:42","end":"08:08","startHours":6.692278337225187,"endHours":8.130169268854583,"quality":"inauspicious"},{"name":"Śubha","start":"08:08","end":"09:34","startHours":8.130169268854583,"endHours":9.568060200483977,"quality":"auspicious"},{"name":"Roga","start":"09:34","end":"11:00","startHours":9.568060200483977,"endHours":11.005951132113374,"quality":"inauspicious"},{"name":"Udveg","start":"11:00","end":"12:27","startHours":11.005951132113374,"endHours":12.443842063742768,"quality":"inauspicious"},{"name":"Chala","start":"12:27","end":"13:53","startHours":12.443842063742768,"endHours":13.881732995372165,"quality":"neutral"},{"name":"Labha","start":"13:53","end":"15:19","startHours":13.881732995372165,"endHours":15.319623927001558,"quality":"auspicious"},{"name":"Amṛta","start":"15:19","end":"16:45","startHours":15.319623927001558,"endHours":16.757514858630955,"quality":"auspicious"},{"name":"Kāla","start":"16:45","end":"18:12","startHours":16.757514858630955,"endHours":18.19540579026035,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:12","end":"19:45","startHours":18.19540579026035,"endHours":19.757514858630955,"quality":"auspicious"},{"name":"Amṛta","start":"19:45","end":"21:19","startHours":19.757514858630955,"endHours":21.319623927001558,"quality":"auspicious"},{"name":"Kāla","start":"21:19","end":"22:53","startHours":21.319623927001558,"endHours":22.88173299537216,"quality":"inauspicious"},{"name":"Śubha","start":"22:53","end":"00:27","startHours":22.88173299537216,"endHours":24.443842063742768,"quality":"auspicious"},{"name":"Roga","start":"00:27","end":"02:00","startHours":24.443842063742768,"endHours":26.005951132113374,"quality":"inauspicious"},{"name":"Udveg","start":"02:00","end":"03:34","startHours":26.005951132113374,"endHours":27.568060200483977,"quality":"inauspicious"},{"name":"Chala","start":"03:34","end":"05:08","startHours":27.568060200483977,"endHours":29.13016926885458,"quality":"neutral"},{"name":"Labha","start":"05:08","end":"06:42","startHours":29.13016926885458,"endHours":30.692278337225186,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:42","end":"07:42","startHours":6.692278337225187,"endHours":7.692278337225187,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"07:42","end":"08:42","startHours":7.692278337225187,"endHours":8.692278337225186,"planetary_lord":"Moon"},{"name":"Hora 3","start":"08:42","end":"09:42","startHours":8.692278337225186,"endHours":9.692278337225186,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"09:42","end":"10:42","startHours":9.692278337225186,"endHours":10.692278337225186,"planetary_lord":"Venus"},{"name":"Hora 5","start":"10:42","end":"11:42","startHours":10.692278337225186,"endHours":11.692278337225186,"planetary_lord":"Sun"},{"name":"Hora 6","start":"11:42","end":"12:42","startHours":11.692278337225186,"endHours":12.692278337225186,"planetary_lord":"Mars"},{"name":"Hora 7","start":"12:42","end":"13:42","startHours":12.692278337225186,"endHours":13.692278337225186,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"13:42","end":"14:42","startHours":13.692278337225186,"endHours":14.692278337225186,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"14:42","end":"15:42","startHours":14.692278337225186,"endHours":15.692278337225186,"planetary_lord":"Moon"},{"name":"Hora 10","start":"15:42","end":"16:42","startHours":15.692278337225186,"endHours":16.692278337225186,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"16:42","end":"17:42","startHours":16.692278337225186,"endHours":17.692278337225186,"planetary_lord":"Venus"},{"name":"Hora 12","start":"17:42","end":"18:42","startHours":17.692278337225186,"endHours":18.692278337225186,"planetary_lord":"Sun"},{"name":"Hora 13","start":"18:42","end":"19:42","startHours":18.692278337225186,"endHours":19.692278337225186,"planetary_lord":"Mars"},{"name":"Hora 14","start":"19:42","end":"20:42","startHours":19.692278337225186,"endHours":20.692278337225186,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"20:42","end":"21:42","startHours":20.692278337225186,"endHours":21.692278337225186,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"21:42","end":"22:42","startHours":21.692278337225186,"endHours":22.692278337225186,"planetary_lord":"Moon"},{"name":"Hora 17","start":"22:42","end":"23:42","startHours":22.692278337225186,"endHours":23.692278337225186,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"23:42","end":"00:42","startHours":23.692278337225186,"endHours":24.692278337225186,"planetary_lord":"Venus"},{"name":"Hora 19","start":"00:42","end":"01:42","startHours":24.692278337225186,"endHours":25.692278337225186,"planetary_lord":"Sun"},{"name":"Hora 20","start":"01:42","end":"02:42","startHours":25.692278337225186,"endHours":26.692278337225186,"planetary_lord":"Mars"},{"name":"Hora 21","start":"02:42","end":"03:42","startHours":26.692278337225186,"endHours":27.692278337225186,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"03:42","end":"04:42","startHours":27.692278337225186,"endHours":28.692278337225186,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"04:42","end":"05:42","startHours":28.692278337225186,"endHours":29.692278337225186,"planetary_lord":"Moon"},{"name":"Hora 24","start":"05:42","end":"06:42","startHours":29.692278337225186,"endHours":30.692278337225186,"planetary_lord":"Mercury"}],"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","Vṛścika","Dhanu","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Tulā","Makara","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"South","rahuVasa":"East","anandadiYoga":{"name":"Śubha","quality":"Auspicious"},"drikRitu":"Hemanta (Pre-winter) (Drik)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-21.988277542781915,"eotMinutes":-7.499323824565993,"ayanamsa":23.5879}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Śukla Pakṣa","solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Śukla Caturthī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"lohri","name":"Lohri","name_sanskrit":"लोहड़ी","tradition":"Regional","significance":"Punjab harvest festival; eve of Makara Saṅkrānti. (Approximated as 13/14 January annually; correct via Sun in Dhanu/Makara cusp.)","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":4},{"id":"dhanu-sankranti","name":"Dhanu Saṅkrānti","name_sanskrit":"धनु सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Sagittarius; Dhanu-māsa (Khara-māsa).","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":5},{"id":"vinayaka-chaturthi","name":"Vināyaka Caturthī (monthly)","name_sanskrit":"विनायक चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Śukla-pakṣa Caturthī; auspicious for new ventures.","vrata":true,"detection":{"tithi_number":4,"tithi_paksha":"Śukla"},"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":[]},"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 January 10, 1981 CE · Erode, Tamil Nadu · Vidhyamitra","description":"January 10, 1981 CE for Erode, Tamil Nadu: Śukla Caturthī, sūryodaya 06:42, sūryāsta 18:12.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/erode/1981-01-10","hreflang_alternates":{"en":"https://vidhyamitra.com/city/erode/1981-01-10","sa":"https://sa.vidhyamitra.com/city/erode/1981-01-10","hi":"https://hi.vidhyamitra.com/city/erode/1981-01-10","x-default":"https://vidhyamitra.com/city/erode/1981-01-10"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T17:31:07.620Z","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":"2026-05-18T17:31:07.620Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T17:31:07.620Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}