{"id":"vidhyamitra:city-day:coimbatore:1981-02-08:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/coimbatore/1981-02-08","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-02-08","date_display":"February 8, 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":8,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444643.770833,"kali_year":5082,"ahargana":1856178.2708,"sun":{"sidereal_longitude":295.7134,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":334.8142,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":39.1009,"elapsed_within_tithi_degrees":3.1009},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1,"moon_longitude":334.8142,"elapsed_within_degrees":1.4809},"yoga":{"number":21,"name":"Siddha","sum_longitude":270.5276},"karana":{"half_tithi_index":6,"name":"Vaṇija"},"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":2,"day":8,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444643.770833,"ahargana":1856178.2708,"kali_year":5082,"ayanamsa_lahiri":23.5891,"grahas":{"sun":{"sidereal_longitude":295.606588,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":336.381988,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1},"retrograde":false,"latitude":-3.1283},"mars":{"sidereal_longitude":307.57178799999997,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":311.62708799999996,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":166.534988,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"venus":{"sidereal_longitude":281.43728799999997,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":165.60628799999995,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":110.7427,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":290.7427,"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":8,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444643.770833,"kali_year":5082,"ahargana":1856178.2708,"sun":{"sidereal_longitude":295.7134,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":334.8142,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":39.1009,"elapsed_within_tithi_degrees":3.1009},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1,"moon_longitude":334.8142,"elapsed_within_degrees":1.4809},"yoga":{"number":21,"name":"Siddha","sum_longitude":270.5276},"karana":{"half_tithi_index":6,"name":"Vaṇija"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.128,"elongation":39.101},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.128,"opposition_distance":140.899}},"eclipse_window_40days":[{"offset_days":-19,"type":"lunar","occurs":true,"moon_latitude":-1.332,"opposition_distance":1.776},{"offset_days":-3,"type":"solar","occurs":true,"moon_latitude":-0.15,"elongation":0.162}]},"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":"06:45","sunsetLocal":"18:28","solarNoonLocal":"12:37","dayLengthHours":11.716794319997867,"dayLengthDisplay":"11 Hours 43 Mins 00 Secs","nightLengthDisplay":"12 Hours 17 Mins 00 Secs","moonriseLocal":"09:17","moonsetLocal":"21:22","rahuKala":{"name":"Rāhu Kāla","start":"17:00","end":"18:28","startHours":17.004194104676902,"endHours":18.468793394676634,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:37","end":"14:04","startHours":12.610396234677701,"endHours":14.074995524677433,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:32","end":"17:00","startHours":15.539594814677168,"endHours":17.004194104676902,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:29","end":"09:53","startHours":9.485917749344937,"endHours":9.876477560011532,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:14","end":"07:33","startHours":7.240198838012012,"endHours":7.552646686545288,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:13","end":"13:00","startHours":12.219836424011106,"endHours":13.000956045344296,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:11","end":"05:58","startHours":5.189759832012386,"endHours":5.970879453345576,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:47","end":"06:45","startHours":5.775599548012279,"endHours":6.751999074678768,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:34","end":"15:21","startHours":14.563195288010679,"endHours":15.34431490934387,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:16","end":"18:40","startHours":18.268793394676635,"endHours":18.668793394676634,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:28","end":"18:57","startHours":18.468793394676634,"endHours":18.95699315800988,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:13","end":"19:58","startHours":18.218793394676634,"endHours":19.968793394676634,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:13","end":"01:00","startHours":24.219836424011106,"endHours":25.000956045344296,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:45","end":"08:13","startHours":6.751999074678768,"endHours":8.2165983646785,"quality":"inauspicious"},{"name":"Chala","start":"08:13","end":"09:41","startHours":8.2165983646785,"endHours":9.681197654678234,"quality":"neutral"},{"name":"Labha","start":"09:41","end":"11:09","startHours":9.681197654678234,"endHours":11.145796944677969,"quality":"auspicious"},{"name":"Amṛta","start":"11:09","end":"12:37","startHours":11.145796944677969,"endHours":12.610396234677701,"quality":"auspicious"},{"name":"Kāla","start":"12:37","end":"14:04","startHours":12.610396234677701,"endHours":14.074995524677433,"quality":"inauspicious"},{"name":"Śubha","start":"14:04","end":"15:32","startHours":14.074995524677433,"endHours":15.539594814677168,"quality":"auspicious"},{"name":"Roga","start":"15:32","end":"17:00","startHours":15.539594814677168,"endHours":17.004194104676902,"quality":"inauspicious"},{"name":"Udveg","start":"17:00","end":"18:28","startHours":17.004194104676902,"endHours":18.468793394676634,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:28","end":"20:00","startHours":18.468793394676634,"endHours":20.004194104676902,"quality":"auspicious"},{"name":"Roga","start":"20:00","end":"21:32","startHours":20.004194104676902,"endHours":21.539594814677166,"quality":"inauspicious"},{"name":"Udveg","start":"21:32","end":"23:04","startHours":21.539594814677166,"endHours":23.074995524677433,"quality":"inauspicious"},{"name":"Chala","start":"23:04","end":"00:37","startHours":23.074995524677433,"endHours":24.6103962346777,"quality":"neutral"},{"name":"Labha","start":"00:37","end":"02:09","startHours":24.6103962346777,"endHours":26.14579694467797,"quality":"auspicious"},{"name":"Amṛta","start":"02:09","end":"03:41","startHours":26.14579694467797,"endHours":27.681197654678236,"quality":"auspicious"},{"name":"Kāla","start":"03:41","end":"05:13","startHours":27.681197654678236,"endHours":29.2165983646785,"quality":"inauspicious"},{"name":"Śubha","start":"05:13","end":"06:45","startHours":29.2165983646785,"endHours":30.751999074678768,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:45","end":"07:45","startHours":6.751999074678768,"endHours":7.751999074678768,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:45","end":"08:45","startHours":7.751999074678768,"endHours":8.751999074678768,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:45","end":"09:45","startHours":8.751999074678768,"endHours":9.751999074678768,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:45","end":"10:45","startHours":9.751999074678768,"endHours":10.751999074678768,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:45","end":"11:45","startHours":10.751999074678768,"endHours":11.751999074678768,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:45","end":"12:45","startHours":11.751999074678768,"endHours":12.751999074678768,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:45","end":"13:45","startHours":12.751999074678768,"endHours":13.751999074678768,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:45","end":"14:45","startHours":13.751999074678768,"endHours":14.751999074678768,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:45","end":"15:45","startHours":14.751999074678768,"endHours":15.751999074678768,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:45","end":"16:45","startHours":15.751999074678768,"endHours":16.751999074678768,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:45","end":"17:45","startHours":16.751999074678768,"endHours":17.751999074678768,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:45","end":"18:45","startHours":17.751999074678768,"endHours":18.751999074678768,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:45","end":"19:45","startHours":18.751999074678768,"endHours":19.751999074678768,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:45","end":"20:45","startHours":19.751999074678768,"endHours":20.751999074678768,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:45","end":"21:45","startHours":20.751999074678768,"endHours":21.751999074678768,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:45","end":"22:45","startHours":21.751999074678768,"endHours":22.751999074678768,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:45","end":"23:45","startHours":22.751999074678768,"endHours":23.751999074678768,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:45","end":"00:45","startHours":23.751999074678768,"endHours":24.751999074678768,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:45","end":"01:45","startHours":24.751999074678768,"endHours":25.751999074678768,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:45","end":"02:45","startHours":25.751999074678768,"endHours":26.751999074678768,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:45","end":"03:45","startHours":26.751999074678768,"endHours":27.751999074678768,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:45","end":"04:45","startHours":27.751999074678768,"endHours":28.751999074678768,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:45","end":"05:45","startHours":28.751999074678768,"endHours":29.751999074678768,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:45","end":"06:45","startHours":29.751999074678768,"endHours":30.751999074678768,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Revatī"],"unfavorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Citrā","Svātī","Viśākhā","Anurādhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Siṃha","Kanyā","Dhanu","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Karka","Tulā","Vṛścika","Kumbha"]},"dishaShool":"West (Paścim)","chandraVasa":"South-West","rahuVasa":"North-East","anandadiYoga":{"name":"Cara","quality":"Auspicious"},"tropicalRitu":"Śiśira (Winter) (tropical)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-15.064677029680697,"eotMinutes":-14.446974080661976,"ayanamsa":23.5891}},"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","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Māgha","lunar_month_amanta":"Māgha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha 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":"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":"coimbatore"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga February 8, 1981 CE · Coimbatore, Tamil Nadu · Vidhyamitra","description":"February 8, 1981 CE for Coimbatore, Tamil Nadu: Śukla Caturthī, sūryodaya 06:45, sūryāsta 18:28.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/coimbatore/1981-02-08","hreflang_alternates":{"en":"https://vidhyamitra.com/city/coimbatore/1981-02-08","sa":"https://sa.vidhyamitra.com/city/coimbatore/1981-02-08","hi":"https://hi.vidhyamitra.com/city/coimbatore/1981-02-08","x-default":"https://vidhyamitra.com/city/coimbatore/1981-02-08"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T10:04:29.214Z","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":"2026-06-02T10:04:29.214Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T10:04:29.214Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}