{"id":"vidhyamitra:city-day:coimbatore:1981-01-10:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/coimbatore/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":"coimbatore","name":"Coimbatore, Tamil Nadu","lat":11.0168,"lon":76.9558,"tz_offset_hours":5.5,"state":"Tamil Nadu","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"coimbatore","name":"Coimbatore, Tamil Nadu","lat":11.0168,"lon":76.9558,"tz_offset_hours":5.5,"state":"Tamil Nadu","country":"IN","tier":"tier-1"},"sunriseLocal":"06:44","sunsetLocal":"18:15","solarNoonLocal":"12:30","dayLengthHours":11.521163847245255,"dayLengthDisplay":"11 Hours 31 Mins 16 Secs","nightLengthDisplay":"12 Hours 28 Mins 44 Secs","moonriseLocal":"09:39","moonsetLocal":"21:29","rahuKala":{"name":"Rāhu Kāla","start":"09:37","end":"11:03","startHours":9.614311101931452,"endHours":11.05445658283711,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:56","end":"15:22","startHours":13.934747544648424,"endHours":15.37489302555408,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:44","end":"08:10","startHours":6.73402014012014,"endHours":8.174165621025796,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:25","end":"09:48","startHours":9.422291704477367,"endHours":9.806330499385542,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:13","end":"07:31","startHours":7.214068633755359,"endHours":7.521299669681898,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:07","end":"12:53","startHours":12.110563268834593,"endHours":12.878640858650943,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:12","end":"05:58","startHours":5.197864960487439,"endHours":5.965942550303789,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:46","end":"06:44","startHours":5.773923152849702,"endHours":6.73402014012014,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:25","end":"15:11","startHours":14.414796038283644,"endHours":15.182873628099994,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:03","end":"18:27","startHours":18.055183987365396,"endHours":18.455183987365395,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:15","end":"18:44","startHours":18.255183987365395,"endHours":18.735232481000615,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:00","end":"19:45","startHours":18.005183987365395,"endHours":19.755183987365395,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:07","end":"00:53","startHours":24.110563268834593,"endHours":24.878640858650943,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"06:44","end":"08:10","startHours":6.73402014012014,"endHours":8.174165621025796,"quality":"inauspicious"},{"name":"Śubha","start":"08:10","end":"09:37","startHours":8.174165621025796,"endHours":9.614311101931452,"quality":"auspicious"},{"name":"Roga","start":"09:37","end":"11:03","startHours":9.614311101931452,"endHours":11.05445658283711,"quality":"inauspicious"},{"name":"Udveg","start":"11:03","end":"12:30","startHours":11.05445658283711,"endHours":12.494602063742768,"quality":"inauspicious"},{"name":"Chala","start":"12:30","end":"13:56","startHours":12.494602063742768,"endHours":13.934747544648424,"quality":"neutral"},{"name":"Labha","start":"13:56","end":"15:22","startHours":13.934747544648424,"endHours":15.37489302555408,"quality":"auspicious"},{"name":"Amṛta","start":"15:22","end":"16:49","startHours":15.37489302555408,"endHours":16.81503850645974,"quality":"auspicious"},{"name":"Kāla","start":"16:49","end":"18:15","startHours":16.81503850645974,"endHours":18.255183987365395,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:15","end":"19:49","startHours":18.255183987365395,"endHours":19.81503850645974,"quality":"auspicious"},{"name":"Amṛta","start":"19:49","end":"21:22","startHours":19.81503850645974,"endHours":21.37489302555408,"quality":"auspicious"},{"name":"Kāla","start":"21:22","end":"22:56","startHours":21.37489302555408,"endHours":22.934747544648424,"quality":"inauspicious"},{"name":"Śubha","start":"22:56","end":"00:30","startHours":22.934747544648424,"endHours":24.494602063742768,"quality":"auspicious"},{"name":"Roga","start":"00:30","end":"02:03","startHours":24.494602063742768,"endHours":26.054456582837112,"quality":"inauspicious"},{"name":"Udveg","start":"02:03","end":"03:37","startHours":26.054456582837112,"endHours":27.614311101931456,"quality":"inauspicious"},{"name":"Chala","start":"03:37","end":"05:10","startHours":27.614311101931456,"endHours":29.174165621025796,"quality":"neutral"},{"name":"Labha","start":"05:10","end":"06:44","startHours":29.174165621025796,"endHours":30.73402014012014,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:44","end":"07:44","startHours":6.73402014012014,"endHours":7.73402014012014,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"07:44","end":"08:44","startHours":7.73402014012014,"endHours":8.73402014012014,"planetary_lord":"Moon"},{"name":"Hora 3","start":"08:44","end":"09:44","startHours":8.73402014012014,"endHours":9.73402014012014,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"09:44","end":"10:44","startHours":9.73402014012014,"endHours":10.73402014012014,"planetary_lord":"Venus"},{"name":"Hora 5","start":"10:44","end":"11:44","startHours":10.73402014012014,"endHours":11.73402014012014,"planetary_lord":"Sun"},{"name":"Hora 6","start":"11:44","end":"12:44","startHours":11.73402014012014,"endHours":12.73402014012014,"planetary_lord":"Mars"},{"name":"Hora 7","start":"12:44","end":"13:44","startHours":12.73402014012014,"endHours":13.73402014012014,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"13:44","end":"14:44","startHours":13.73402014012014,"endHours":14.73402014012014,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"14:44","end":"15:44","startHours":14.73402014012014,"endHours":15.73402014012014,"planetary_lord":"Moon"},{"name":"Hora 10","start":"15:44","end":"16:44","startHours":15.73402014012014,"endHours":16.73402014012014,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"16:44","end":"17:44","startHours":16.73402014012014,"endHours":17.73402014012014,"planetary_lord":"Venus"},{"name":"Hora 12","start":"17:44","end":"18:44","startHours":17.73402014012014,"endHours":18.73402014012014,"planetary_lord":"Sun"},{"name":"Hora 13","start":"18:44","end":"19:44","startHours":18.73402014012014,"endHours":19.73402014012014,"planetary_lord":"Mars"},{"name":"Hora 14","start":"19:44","end":"20:44","startHours":19.73402014012014,"endHours":20.73402014012014,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"20:44","end":"21:44","startHours":20.73402014012014,"endHours":21.73402014012014,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"21:44","end":"22:44","startHours":21.73402014012014,"endHours":22.73402014012014,"planetary_lord":"Moon"},{"name":"Hora 17","start":"22:44","end":"23:44","startHours":22.73402014012014,"endHours":23.73402014012014,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"23:44","end":"00:44","startHours":23.73402014012014,"endHours":24.73402014012014,"planetary_lord":"Venus"},{"name":"Hora 19","start":"00:44","end":"01:44","startHours":24.73402014012014,"endHours":25.73402014012014,"planetary_lord":"Sun"},{"name":"Hora 20","start":"01:44","end":"02:44","startHours":25.73402014012014,"endHours":26.73402014012014,"planetary_lord":"Mars"},{"name":"Hora 21","start":"02:44","end":"03:44","startHours":26.73402014012014,"endHours":27.73402014012014,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"03:44","end":"04:44","startHours":27.73402014012014,"endHours":28.73402014012014,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"04:44","end":"05:44","startHours":28.73402014012014,"endHours":29.73402014012014,"planetary_lord":"Moon"},{"name":"Hora 24","start":"05:44","end":"06:44","startHours":29.73402014012014,"endHours":30.73402014012014,"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"},"tropicalRitu":"Hemanta (Pre-winter) (tropical)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","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","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Pauṣa","lunar_month_amanta":"Pauṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Śukla Caturthī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"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":"coimbatore"},"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 · Coimbatore, Tamil Nadu · Vidhyamitra","description":"January 10, 1981 CE for Coimbatore, Tamil Nadu: Śukla Caturthī, sūryodaya 06:44, sūryāsta 18:15.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/coimbatore/1981-01-10","hreflang_alternates":{"en":"https://vidhyamitra.com/city/coimbatore/1981-01-10","sa":"https://sa.vidhyamitra.com/city/coimbatore/1981-01-10","hi":"https://hi.vidhyamitra.com/city/coimbatore/1981-01-10","x-default":"https://vidhyamitra.com/city/coimbatore/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":"2026-06-02T02:41:03.885Z","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":"2026-06-02T02:41:03.885Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T02:41:03.885Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}