{"id":"vidhyamitra:city-day:coimbatore:1981-05-07:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/coimbatore/1981-05-07","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-05-07","date_display":"May 7, 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":5,"day":7,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444731.770833,"kali_year":5083,"ahargana":1856266.2708,"sun":{"sidereal_longitude":22.8843,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":60.979,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":38.0946,"elapsed_within_tithi_degrees":2.0946},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":3,"moon_longitude":60.979,"elapsed_within_degrees":7.6456},"yoga":{"number":7,"name":"Sukarma","sum_longitude":83.8633},"karana":{"half_tithi_index":6,"name":"Vaṇija"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"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":5,"day":7,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444731.770833,"ahargana":1856266.2708,"kali_year":5083,"ayanamsa_lahiri":23.5924,"grahas":{"sun":{"sidereal_longitude":22.812926000000004,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3},"retrograde":false},"moon":{"sidereal_longitude":63.190426,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":3},"retrograde":false,"latitude":-3.186},"mars":{"sidereal_longitude":15.407925999999975,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":33.87192600000003,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":157.64612599999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"venus":{"sidereal_longitude":30.800926000000004,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":159.87002600000005,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":106.08,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":286.08,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"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":5,"day":7,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444731.770833,"kali_year":5083,"ahargana":1856266.2708,"sun":{"sidereal_longitude":22.8843,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":60.979,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":38.0946,"elapsed_within_tithi_degrees":2.0946},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":3,"moon_longitude":60.979,"elapsed_within_degrees":7.6456},"yoga":{"number":7,"name":"Sukarma","sum_longitude":83.8633},"karana":{"half_tithi_index":6,"name":"Vaṇija"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.186,"elongation":38.095},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.186,"opposition_distance":141.905}},"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":"06:02","sunsetLocal":"18:36","solarNoonLocal":"12:19","dayLengthHours":12.566050483574408,"dayLengthDisplay":"12 Hours 33 Mins 58 Secs","nightLengthDisplay":"11 Hours 26 Mins 02 Secs","moonriseLocal":"08:38","moonsetLocal":"21:22","rahuKala":{"name":"Rāhu Kāla","start":"13:53","end":"15:27","startHours":13.881841966996705,"endHours":15.452598277443506,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"06:02","end":"07:36","startHours":6.0280604147627,"endHours":7.598816725209501,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"09:10","end":"10:44","startHours":9.169573035656303,"endHours":10.740329346103103,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:58","end":"09:23","startHours":8.960138860930062,"endHours":9.379007210382541,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:33","end":"06:53","startHours":6.5516458515783,"endHours":6.886740531140284,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:54","end":"12:44","startHours":11.892217307097422,"endHours":12.729954006002384,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:21","end":"05:11","startHours":4.3525870169527785,"endHours":5.1903237158577396,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:59","end":"06:02","startHours":4.980889541131499,"endHours":6.0280604147627,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:24","end":"15:15","startHours":14.405427403812304,"endHours":15.243164102717264,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:24","end":"18:48","startHours":18.394110898337107,"endHours":18.794110898337106,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:36","end":"19:07","startHours":18.594110898337107,"endHours":19.117696335152708,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:21","end":"20:06","startHours":18.344110898337107,"endHours":20.094110898337107,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:54","end":"00:44","startHours":23.89221730709742,"endHours":24.729954006002384,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"06:02","end":"07:36","startHours":6.0280604147627,"endHours":7.598816725209501,"quality":"auspicious"},{"name":"Roga","start":"07:36","end":"09:10","startHours":7.598816725209501,"endHours":9.169573035656303,"quality":"inauspicious"},{"name":"Udveg","start":"09:10","end":"10:44","startHours":9.169573035656303,"endHours":10.740329346103103,"quality":"inauspicious"},{"name":"Chala","start":"10:44","end":"12:19","startHours":10.740329346103103,"endHours":12.311085656549903,"quality":"neutral"},{"name":"Labha","start":"12:19","end":"13:53","startHours":12.311085656549903,"endHours":13.881841966996705,"quality":"auspicious"},{"name":"Amṛta","start":"13:53","end":"15:27","startHours":13.881841966996705,"endHours":15.452598277443506,"quality":"auspicious"},{"name":"Kāla","start":"15:27","end":"17:01","startHours":15.452598277443506,"endHours":17.023354587890307,"quality":"inauspicious"},{"name":"Śubha","start":"17:01","end":"18:36","startHours":17.023354587890307,"endHours":18.594110898337107,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"18:36","end":"20:01","startHours":18.594110898337107,"endHours":20.023354587890307,"quality":"auspicious"},{"name":"Kāla","start":"20:01","end":"21:27","startHours":20.023354587890307,"endHours":21.452598277443506,"quality":"inauspicious"},{"name":"Śubha","start":"21:27","end":"22:53","startHours":21.452598277443506,"endHours":22.881841966996703,"quality":"auspicious"},{"name":"Roga","start":"22:53","end":"00:19","startHours":22.881841966996703,"endHours":24.311085656549903,"quality":"inauspicious"},{"name":"Udveg","start":"00:19","end":"01:44","startHours":24.311085656549903,"endHours":25.740329346103103,"quality":"inauspicious"},{"name":"Chala","start":"01:44","end":"03:10","startHours":25.740329346103103,"endHours":27.1695730356563,"quality":"neutral"},{"name":"Labha","start":"03:10","end":"04:36","startHours":27.1695730356563,"endHours":28.5988167252095,"quality":"auspicious"},{"name":"Amṛta","start":"04:36","end":"06:02","startHours":28.5988167252095,"endHours":30.0280604147627,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:02","end":"07:02","startHours":6.0280604147627,"endHours":7.0280604147627,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"07:02","end":"08:02","startHours":7.0280604147627,"endHours":8.028060414762699,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"08:02","end":"09:02","startHours":8.028060414762699,"endHours":9.028060414762699,"planetary_lord":"Moon"},{"name":"Hora 4","start":"09:02","end":"10:02","startHours":9.028060414762699,"endHours":10.028060414762699,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"10:02","end":"11:02","startHours":10.028060414762699,"endHours":11.028060414762699,"planetary_lord":"Venus"},{"name":"Hora 6","start":"11:02","end":"12:02","startHours":11.028060414762699,"endHours":12.028060414762699,"planetary_lord":"Sun"},{"name":"Hora 7","start":"12:02","end":"13:02","startHours":12.028060414762699,"endHours":13.028060414762699,"planetary_lord":"Mars"},{"name":"Hora 8","start":"13:02","end":"14:02","startHours":13.028060414762699,"endHours":14.028060414762699,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"14:02","end":"15:02","startHours":14.028060414762699,"endHours":15.028060414762699,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"15:02","end":"16:02","startHours":15.028060414762699,"endHours":16.0280604147627,"planetary_lord":"Moon"},{"name":"Hora 11","start":"16:02","end":"17:02","startHours":16.0280604147627,"endHours":17.0280604147627,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"17:02","end":"18:02","startHours":17.0280604147627,"endHours":18.0280604147627,"planetary_lord":"Venus"},{"name":"Hora 13","start":"18:02","end":"19:02","startHours":18.0280604147627,"endHours":19.0280604147627,"planetary_lord":"Sun"},{"name":"Hora 14","start":"19:02","end":"20:02","startHours":19.0280604147627,"endHours":20.0280604147627,"planetary_lord":"Mars"},{"name":"Hora 15","start":"20:02","end":"21:02","startHours":20.0280604147627,"endHours":21.0280604147627,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"21:02","end":"22:02","startHours":21.0280604147627,"endHours":22.0280604147627,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"22:02","end":"23:02","startHours":22.0280604147627,"endHours":23.0280604147627,"planetary_lord":"Moon"},{"name":"Hora 18","start":"23:02","end":"00:02","startHours":23.0280604147627,"endHours":24.0280604147627,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"00:02","end":"01:02","startHours":24.0280604147627,"endHours":25.0280604147627,"planetary_lord":"Venus"},{"name":"Hora 20","start":"01:02","end":"02:02","startHours":25.0280604147627,"endHours":26.0280604147627,"planetary_lord":"Sun"},{"name":"Hora 21","start":"02:02","end":"03:02","startHours":26.0280604147627,"endHours":27.0280604147627,"planetary_lord":"Mars"},{"name":"Hora 22","start":"03:02","end":"04:02","startHours":27.0280604147627,"endHours":28.0280604147627,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"04:02","end":"05:02","startHours":28.0280604147627,"endHours":29.0280604147627,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"05:02","end":"06:02","startHours":29.0280604147627,"endHours":30.0280604147627,"planetary_lord":"Moon"}],"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","Mithuna","Siṃha","Vṛścika","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Karka","Kanyā","Tulā","Makara","Kumbha"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"South","rahuVasa":"North-West","anandadiYoga":{"name":"Amṛta","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring) (tropical)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":16.741377077756432,"eotMinutes":3.5116606070058483,"ayanamsa":23.5924}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Vaiśākha","lunar_month_amanta":"Vaiśākha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha 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":"guru-walk","name":"Bṛhaspati Walk","name_sanskrit":"गुरु यात्रा","type":"graha","description":"Wisdom transmission + BG 4.34.","step_count":8,"url":"/walk/guru-walk"},"reason":"Guruvāra (Thursday) — 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 May 7, 1981 CE · Coimbatore, Tamil Nadu · Vidhyamitra","description":"May 7, 1981 CE for Coimbatore, Tamil Nadu: Śukla Caturthī, sūryodaya 06:02, sūryāsta 18:36.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/coimbatore/1981-05-07","hreflang_alternates":{"en":"https://vidhyamitra.com/city/coimbatore/1981-05-07","sa":"https://sa.vidhyamitra.com/city/coimbatore/1981-05-07","hi":"https://hi.vidhyamitra.com/city/coimbatore/1981-05-07","x-default":"https://vidhyamitra.com/city/coimbatore/1981-05-07"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T04:53:57.458Z","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":"2026-06-02T04:53:57.458Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T04:53:57.458Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}