{"id":"vidhyamitra:city-day:erode:1973-12-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/erode/1973-12-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1973-12-13","date_display":"December 13, 1973 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":1973,"month":12,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2442029.770833,"kali_year":5075,"ahargana":1853564.2708,"sun":{"sidereal_longitude":237.0574,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":95.9971,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":218.9397,"elapsed_within_tithi_degrees":2.9397},"nakshatra":{"number":8,"name":"Puṣya","pada":1,"moon_longitude":95.9971,"elapsed_within_degrees":2.6638},"yoga":{"number":25,"name":"Brahma","sum_longitude":333.0546},"karana":{"half_tithi_index":36,"name":"Bava"},"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":1973,"month":12,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2442029.770833,"ahargana":1853564.2708,"kali_year":5075,"ayanamsa_lahiri":23.4891,"grahas":{"sun":{"sidereal_longitude":237.396162,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":99.21106199999997,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":2},"retrograde":false,"latitude":-2.0239},"mars":{"sidereal_longitude":3.993062000000009,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":222.897062,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":287.320562,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"venus":{"sidereal_longitude":280.497262,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":68.85296199999999,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":249.245,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":69.245,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":1},"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":1973,"month":12,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2442029.770833,"kali_year":5075,"ahargana":1853564.2708,"sun":{"sidereal_longitude":237.0574,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":95.9971,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":218.9397,"elapsed_within_tithi_degrees":2.9397},"nakshatra":{"number":8,"name":"Puṣya","pada":1,"moon_longitude":95.9971,"elapsed_within_degrees":2.6638},"yoga":{"number":25,"name":"Brahma","sum_longitude":333.0546},"karana":{"half_tithi_index":36,"name":"Bava"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.024,"elongation":141.06},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.024,"opposition_distance":38.94}},"eclipse_window_40days":[{"offset_days":-3,"type":"lunar","occurs":true,"moon_latitude":1.303,"opposition_distance":1.423}]},"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":"06:30","sunsetLocal":"17:58","solarNoonLocal":"12:14","dayLengthHours":11.468469026902959,"dayLengthDisplay":"11 Hours 28 Mins 06 Secs","nightLengthDisplay":"12 Hours 31 Mins 54 Secs","moonriseLocal":"20:42","moonsetLocal":"09:20","rahuKala":{"name":"Rāhu Kāla","start":"13:40","end":"15:06","startHours":13.667567790872566,"endHours":15.101126419235435,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"06:30","end":"07:56","startHours":6.4997746490582164,"endHours":7.933333277421086,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"09:22","end":"10:48","startHours":9.366891905783955,"endHours":10.800450534146826,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:11","end":"09:33","startHours":9.175750755335574,"endHours":9.55803305623234,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:59","end":"07:17","startHours":6.977627525179173,"endHours":7.283453365896586,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:51","end":"12:37","startHours":11.851726861612931,"endHours":12.616291463406462,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:58","end":"05:44","startHours":4.970645445471155,"endHours":5.735210047264686,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:33","end":"06:30","startHours":5.544068896816303,"endHours":6.4997746490582164,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:09","end":"14:55","startHours":14.145420666993523,"endHours":14.909985268787054,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:46","end":"18:10","startHours":17.768243675961177,"endHours":18.168243675961175,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:58","end":"18:27","startHours":17.968243675961176,"endHours":18.446096552082132,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:43","end":"19:28","startHours":17.718243675961176,"endHours":19.468243675961176,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:51","end":"00:37","startHours":23.85172686161293,"endHours":24.616291463406462,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"06:30","end":"07:56","startHours":6.4997746490582164,"endHours":7.933333277421086,"quality":"auspicious"},{"name":"Roga","start":"07:56","end":"09:22","startHours":7.933333277421086,"endHours":9.366891905783955,"quality":"inauspicious"},{"name":"Udveg","start":"09:22","end":"10:48","startHours":9.366891905783955,"endHours":10.800450534146826,"quality":"inauspicious"},{"name":"Chala","start":"10:48","end":"12:14","startHours":10.800450534146826,"endHours":12.234009162509697,"quality":"neutral"},{"name":"Labha","start":"12:14","end":"13:40","startHours":12.234009162509697,"endHours":13.667567790872566,"quality":"auspicious"},{"name":"Amṛta","start":"13:40","end":"15:06","startHours":13.667567790872566,"endHours":15.101126419235435,"quality":"auspicious"},{"name":"Kāla","start":"15:06","end":"16:32","startHours":15.101126419235435,"endHours":16.534685047598305,"quality":"inauspicious"},{"name":"Śubha","start":"16:32","end":"17:58","startHours":16.534685047598305,"endHours":17.968243675961176,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"17:58","end":"19:32","startHours":17.968243675961176,"endHours":19.534685047598305,"quality":"auspicious"},{"name":"Kāla","start":"19:32","end":"21:06","startHours":19.534685047598305,"endHours":21.101126419235435,"quality":"inauspicious"},{"name":"Śubha","start":"21:06","end":"22:40","startHours":21.101126419235435,"endHours":22.667567790872567,"quality":"auspicious"},{"name":"Roga","start":"22:40","end":"00:14","startHours":22.667567790872567,"endHours":24.234009162509697,"quality":"inauspicious"},{"name":"Udveg","start":"00:14","end":"01:48","startHours":24.234009162509697,"endHours":25.800450534146826,"quality":"inauspicious"},{"name":"Chala","start":"01:48","end":"03:22","startHours":25.800450534146826,"endHours":27.36689190578396,"quality":"neutral"},{"name":"Labha","start":"03:22","end":"04:56","startHours":27.36689190578396,"endHours":28.933333277421088,"quality":"auspicious"},{"name":"Amṛta","start":"04:56","end":"06:30","startHours":28.933333277421088,"endHours":30.499774649058217,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:30","end":"07:30","startHours":6.4997746490582164,"endHours":7.4997746490582164,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"07:30","end":"08:30","startHours":7.4997746490582164,"endHours":8.499774649058217,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"08:30","end":"09:30","startHours":8.499774649058217,"endHours":9.499774649058217,"planetary_lord":"Moon"},{"name":"Hora 4","start":"09:30","end":"10:30","startHours":9.499774649058217,"endHours":10.499774649058217,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"10:30","end":"11:30","startHours":10.499774649058217,"endHours":11.499774649058217,"planetary_lord":"Venus"},{"name":"Hora 6","start":"11:30","end":"12:30","startHours":11.499774649058217,"endHours":12.499774649058217,"planetary_lord":"Sun"},{"name":"Hora 7","start":"12:30","end":"13:30","startHours":12.499774649058217,"endHours":13.499774649058217,"planetary_lord":"Mars"},{"name":"Hora 8","start":"13:30","end":"14:30","startHours":13.499774649058217,"endHours":14.499774649058217,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"14:30","end":"15:30","startHours":14.499774649058217,"endHours":15.499774649058217,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"15:30","end":"16:30","startHours":15.499774649058217,"endHours":16.499774649058217,"planetary_lord":"Moon"},{"name":"Hora 11","start":"16:30","end":"17:30","startHours":16.499774649058217,"endHours":17.499774649058217,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"17:30","end":"18:30","startHours":17.499774649058217,"endHours":18.499774649058217,"planetary_lord":"Venus"},{"name":"Hora 13","start":"18:30","end":"19:30","startHours":18.499774649058217,"endHours":19.499774649058217,"planetary_lord":"Sun"},{"name":"Hora 14","start":"19:30","end":"20:30","startHours":19.499774649058217,"endHours":20.499774649058217,"planetary_lord":"Mars"},{"name":"Hora 15","start":"20:30","end":"21:30","startHours":20.499774649058217,"endHours":21.499774649058217,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"21:30","end":"22:30","startHours":21.499774649058217,"endHours":22.499774649058217,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"22:30","end":"23:30","startHours":22.499774649058217,"endHours":23.499774649058217,"planetary_lord":"Moon"},{"name":"Hora 18","start":"23:30","end":"00:30","startHours":23.499774649058217,"endHours":24.499774649058217,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"00:30","end":"01:30","startHours":24.499774649058217,"endHours":25.499774649058217,"planetary_lord":"Venus"},{"name":"Hora 20","start":"01:30","end":"02:30","startHours":25.499774649058217,"endHours":26.499774649058217,"planetary_lord":"Sun"},{"name":"Hora 21","start":"02:30","end":"03:30","startHours":26.499774649058217,"endHours":27.499774649058217,"planetary_lord":"Mars"},{"name":"Hora 22","start":"03:30","end":"04:30","startHours":27.499774649058217,"endHours":28.499774649058217,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"04:30","end":"05:30","startHours":28.499774649058217,"endHours":29.499774649058217,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"05:30","end":"06:30","startHours":29.499774649058217,"endHours":30.499774649058217,"planetary_lord":"Moon"}],"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":["Meṣa","Vṛṣabha","Karka","Kanyā","Dhanu","Makara"],"unfavorable_rashis":["Mithuna","Siṃha","Tulā","Vṛścika","Kumbha","Mīna"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"South-West","rahuVasa":"North-West","anandadiYoga":{"name":"Mātaṇga","quality":"Auspicious"},"drikRitu":"Hemanta (Pre-winter) (Drik)","vedicRitu":"Śarad (Autumn)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-23.123249503804352,"eotMinutes":5.090650249418121,"ayanamsa":23.4891}},"calendars":{"vikram_samvat":2030,"vikram_samvatsara":"Akṣaya","saka_samvat":1895,"saka_samvatsara":"Pramādī","bengali_samvat":1380,"malayalam_era":1149,"nanakshahi_year":504,"lunar_month":"Mārgaśīrṣa","lunar_month_paksha_full":"Mārgaśīrṣa Kṛṣṇa Pakṣa","solar_month":"Vṛścika (Kārttikai)","ritu":"Hemanta (Pre-winter)","display_summary":"Mārgaśīrṣa Kṛṣṇa Caturthī · Vikram 2030 Akṣaya · Śaka 1895 Pramādī"},"festivals":[{"id":"vrischika-sankranti","name":"Vṛścika Saṅkrānti","name_sanskrit":"वृश्चिक सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Scorpio.","vrata":false,"detection":{"sun_rashi":"Vṛścika"},"precedence":5},{"id":"sankashti-chaturthi","name":"Saṅkaṣṭī Caturthī","name_sanskrit":"सङ्कष्टी चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Gaṇeśa vrata.","vrata":true,"detection":{"tithi_number":19,"tithi_paksha":"Kṛṣṇa"},"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":"erode"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga December 13, 1973 CE · Erode, Tamil Nadu · Vidhyamitra","description":"December 13, 1973 CE for Erode, Tamil Nadu: Kṛṣṇa Caturthī, sūryodaya 06:30, sūryāsta 17:58.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/erode/1973-12-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/erode/1973-12-13","sa":"https://sa.vidhyamitra.com/city/erode/1973-12-13","hi":"https://hi.vidhyamitra.com/city/erode/1973-12-13","x-default":"https://vidhyamitra.com/city/erode/1973-12-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-19T06:54:21.561Z","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":"2026-05-19T06:54:21.561Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-19T06:54:21.561Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}