{"id":"vidhyamitra:city-day:coimbatore:1981-04-06:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/coimbatore/1981-04-06","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-04-06","date_display":"April 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":4,"day":6,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444700.770833,"kali_year":5082,"ahargana":1856235.2708,"sun":{"sidereal_longitude":352.7685,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":7.8653,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":2,"name":"Dvitīyā","paksha":"Śukla","full_name":"Śukla Dvitīyā","elongation_degrees":15.0969,"elapsed_within_tithi_degrees":3.0969},"nakshatra":{"number":1,"name":"Aśvinī","pada":3,"moon_longitude":7.8653,"elapsed_within_degrees":7.8653},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":0.6338},"karana":{"half_tithi_index":2,"name":"Bālava"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"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":4,"day":6,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444700.770833,"ahargana":1856235.2708,"kali_year":5082,"ayanamsa_lahiri":23.5912,"grahas":{"sun":{"sidereal_longitude":352.56921,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":9.620810000000006,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":3},"retrograde":false,"latitude":-4.4334},"mars":{"sidereal_longitude":352.05851,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":332.72231,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":160.62441,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":true},"venus":{"sidereal_longitude":352.50941,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":161.86671,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":107.7225,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":287.7225,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"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":4,"day":6,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444700.770833,"kali_year":5082,"ahargana":1856235.2708,"sun":{"sidereal_longitude":352.7685,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":7.8653,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":2,"name":"Dvitīyā","paksha":"Śukla","full_name":"Śukla Dvitīyā","elongation_degrees":15.0969,"elapsed_within_tithi_degrees":3.0969},"nakshatra":{"number":1,"name":"Aśvinī","pada":3,"moon_longitude":7.8653,"elapsed_within_degrees":7.8653},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":0.6338},"karana":{"half_tithi_index":2,"name":"Bālava"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.433,"elongation":15.097},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.433,"opposition_distance":164.903}},"eclipse_window_40days":[]},"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":"06:17","sunsetLocal":"18:33","solarNoonLocal":"12:25","dayLengthHours":12.279570044973953,"dayLengthDisplay":"12 Hours 16 Mins 46 Secs","nightLengthDisplay":"11 Hours 43 Mins 14 Secs","moonriseLocal":"07:21","moonsetLocal":"19:46","rahuKala":{"name":"Rāhu Kāla","start":"07:49","end":"09:21","startHours":7.811271721452153,"endHours":9.346217977073897,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:53","end":"12:25","startHours":10.881164232695642,"endHours":12.416110488317386,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:57","end":"15:29","startHours":13.95105674393913,"endHours":15.486002999560874,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:08","end":"09:33","startHours":9.141558476324331,"endHours":9.550877477823462,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:47","end":"07:07","startHours":6.787974217704323,"endHours":7.115429418903629,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:00","end":"12:50","startHours":12.006791486818253,"endHours":12.825429489816516,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:38","end":"05:27","startHours":4.639049459833882,"endHours":5.457687462832145,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:15","end":"06:17","startHours":5.253027962082579,"endHours":6.276325465830409,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:28","end":"15:17","startHours":14.462705495813044,"endHours":15.281343498811307,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:21","end":"18:45","startHours":18.355895510804363,"endHours":18.75589551080436,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:33","end":"19:04","startHours":18.555895510804362,"endHours":19.067544262678275,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:18","end":"20:03","startHours":18.305895510804362,"endHours":20.055895510804362,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:00","end":"00:50","startHours":24.006791486818255,"endHours":24.825429489816518,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"06:17","end":"07:49","startHours":6.276325465830409,"endHours":7.811271721452153,"quality":"auspicious"},{"name":"Kāla","start":"07:49","end":"09:21","startHours":7.811271721452153,"endHours":9.346217977073897,"quality":"inauspicious"},{"name":"Śubha","start":"09:21","end":"10:53","startHours":9.346217977073897,"endHours":10.881164232695642,"quality":"auspicious"},{"name":"Roga","start":"10:53","end":"12:25","startHours":10.881164232695642,"endHours":12.416110488317386,"quality":"inauspicious"},{"name":"Udveg","start":"12:25","end":"13:57","startHours":12.416110488317386,"endHours":13.95105674393913,"quality":"inauspicious"},{"name":"Chala","start":"13:57","end":"15:29","startHours":13.95105674393913,"endHours":15.486002999560874,"quality":"neutral"},{"name":"Labha","start":"15:29","end":"17:01","startHours":15.486002999560874,"endHours":17.020949255182618,"quality":"auspicious"},{"name":"Amṛta","start":"17:01","end":"18:33","startHours":17.020949255182618,"endHours":18.555895510804362,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"18:33","end":"20:01","startHours":18.555895510804362,"endHours":20.020949255182618,"quality":"neutral"},{"name":"Labha","start":"20:01","end":"21:29","startHours":20.020949255182618,"endHours":21.486002999560874,"quality":"auspicious"},{"name":"Amṛta","start":"21:29","end":"22:57","startHours":21.486002999560874,"endHours":22.95105674393913,"quality":"auspicious"},{"name":"Kāla","start":"22:57","end":"00:25","startHours":22.95105674393913,"endHours":24.416110488317386,"quality":"inauspicious"},{"name":"Śubha","start":"00:25","end":"01:53","startHours":24.416110488317386,"endHours":25.881164232695642,"quality":"auspicious"},{"name":"Roga","start":"01:53","end":"03:21","startHours":25.881164232695642,"endHours":27.3462179770739,"quality":"inauspicious"},{"name":"Udveg","start":"03:21","end":"04:49","startHours":27.3462179770739,"endHours":28.81127172145215,"quality":"inauspicious"},{"name":"Chala","start":"04:49","end":"06:17","startHours":28.81127172145215,"endHours":30.27632546583041,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"06:17","end":"07:17","startHours":6.276325465830409,"endHours":7.276325465830409,"planetary_lord":"Moon"},{"name":"Hora 2","start":"07:17","end":"08:17","startHours":7.276325465830409,"endHours":8.276325465830409,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"08:17","end":"09:17","startHours":8.276325465830409,"endHours":9.276325465830409,"planetary_lord":"Venus"},{"name":"Hora 4","start":"09:17","end":"10:17","startHours":9.276325465830409,"endHours":10.276325465830409,"planetary_lord":"Sun"},{"name":"Hora 5","start":"10:17","end":"11:17","startHours":10.276325465830409,"endHours":11.276325465830409,"planetary_lord":"Mars"},{"name":"Hora 6","start":"11:17","end":"12:17","startHours":11.276325465830409,"endHours":12.276325465830409,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"12:17","end":"13:17","startHours":12.276325465830409,"endHours":13.276325465830409,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"13:17","end":"14:17","startHours":13.276325465830409,"endHours":14.276325465830409,"planetary_lord":"Moon"},{"name":"Hora 9","start":"14:17","end":"15:17","startHours":14.276325465830409,"endHours":15.276325465830409,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"15:17","end":"16:17","startHours":15.276325465830409,"endHours":16.27632546583041,"planetary_lord":"Venus"},{"name":"Hora 11","start":"16:17","end":"17:17","startHours":16.27632546583041,"endHours":17.27632546583041,"planetary_lord":"Sun"},{"name":"Hora 12","start":"17:17","end":"18:17","startHours":17.27632546583041,"endHours":18.27632546583041,"planetary_lord":"Mars"},{"name":"Hora 13","start":"18:17","end":"19:17","startHours":18.27632546583041,"endHours":19.27632546583041,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"19:17","end":"20:17","startHours":19.27632546583041,"endHours":20.27632546583041,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"20:17","end":"21:17","startHours":20.27632546583041,"endHours":21.27632546583041,"planetary_lord":"Moon"},{"name":"Hora 16","start":"21:17","end":"22:17","startHours":21.27632546583041,"endHours":22.27632546583041,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"22:17","end":"23:17","startHours":22.27632546583041,"endHours":23.27632546583041,"planetary_lord":"Venus"},{"name":"Hora 18","start":"23:17","end":"00:17","startHours":23.27632546583041,"endHours":24.27632546583041,"planetary_lord":"Sun"},{"name":"Hora 19","start":"00:17","end":"01:17","startHours":24.27632546583041,"endHours":25.27632546583041,"planetary_lord":"Mars"},{"name":"Hora 20","start":"01:17","end":"02:17","startHours":25.27632546583041,"endHours":26.27632546583041,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"02:17","end":"03:17","startHours":26.27632546583041,"endHours":27.27632546583041,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"03:17","end":"04:17","startHours":27.27632546583041,"endHours":28.27632546583041,"planetary_lord":"Moon"},{"name":"Hora 23","start":"04:17","end":"05:17","startHours":28.27632546583041,"endHours":29.27632546583041,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"05:17","end":"06:17","startHours":29.27632546583041,"endHours":30.27632546583041,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Svātī","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"unfavorable_nakshatras":["Aśvinī","Punarvasu","Puṣya","Aśleṣā","Maghā","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Mithuna","Kanyā","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Karka","Siṃha","Vṛścika","Dhanu","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"East","rahuVasa":"North-East","anandadiYoga":{"name":"Saumya","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring) (tropical)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":6.3556622306528405,"eotMinutes":-2.7898292990430456,"ayanamsa":23.5912}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Caitra","lunar_month_amanta":"Caitra","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mīna (Paṅkuṇi)","ritu":"Vasanta (Spring)","display_summary":"Caitra Śukla Dvitīyā · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[],"todays_walk":{"walk":{"id":"chandra-walk","name":"Candra Walk","name_sanskrit":"चन्द्र यात्रा","type":"graha","description":"Manas-control + BG 6.5-7.","step_count":5,"url":"/walk/chandra-walk"},"reason":"Somavāra (Monday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3101-02-18","event":"Kali Yuga Epoch","chart_id":"kali-yuga-epoch","shared_marker":"same Aśvinī","url":"/day/-3101-02-18","relevance":0.5}]},"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 April 6, 1981 CE · Coimbatore, Tamil Nadu · Vidhyamitra","description":"April 6, 1981 CE for Coimbatore, Tamil Nadu: Śukla Dvitīyā, sūryodaya 06:17, sūryāsta 18:33.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/coimbatore/1981-04-06","hreflang_alternates":{"en":"https://vidhyamitra.com/city/coimbatore/1981-04-06","sa":"https://sa.vidhyamitra.com/city/coimbatore/1981-04-06","hi":"https://hi.vidhyamitra.com/city/coimbatore/1981-04-06","x-default":"https://vidhyamitra.com/city/coimbatore/1981-04-06"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T06:21:33.567Z","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":"2026-06-02T06:21:33.567Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T06:21:33.567Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}