{"id":"vidhyamitra:city-day:erode:2104-12-21:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/erode/2104-12-21","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2104-12-21","date_display":"December 21, 2104 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":2104,"month":12,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2489884.770833,"kali_year":5206,"ahargana":1901419.2708,"sun":{"sidereal_longitude":243.3203,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":285.2066,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":41.8863,"elapsed_within_tithi_degrees":5.8863},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2,"moon_longitude":285.2066,"elapsed_within_degrees":5.2066},"yoga":{"number":13,"name":"Vyāghāta","sum_longitude":168.5269},"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":2104,"month":12,"day":21,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2489884.770833,"ahargana":1901419.2708,"kali_year":5206,"ayanamsa_lahiri":25.3194,"grahas":{"sun":{"sidereal_longitude":243.915749,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":false},"moon":{"sidereal_longitude":284.48174900000004,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false,"latitude":3.5228},"mars":{"sidereal_longitude":248.38804900000002,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":225.68284900000003,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":302.222749,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false},"venus":{"sidereal_longitude":289.67774899999995,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":231.11154899999997,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":233.6568,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":53.6568,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","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":2104,"month":12,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2489884.770833,"kali_year":5206,"ahargana":1901419.2708,"sun":{"sidereal_longitude":243.3203,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":285.2066,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":41.8863,"elapsed_within_tithi_degrees":5.8863},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2,"moon_longitude":285.2066,"elapsed_within_degrees":5.2066},"yoga":{"number":13,"name":"Vyāghāta","sum_longitude":168.5269},"karana":{"half_tithi_index":6,"name":"Vaṇija"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.523,"elongation":41.886},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.523,"opposition_distance":138.114}},"eclipse_window_40days":[{"offset_days":-19,"type":"lunar","occurs":true,"moon_latitude":0.94,"opposition_distance":1.264}]},"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":"06:34","sunsetLocal":"18:02","solarNoonLocal":"12:18","dayLengthHours":11.458876056447087,"dayLengthDisplay":"11 Hours 27 Mins 32 Secs","nightLengthDisplay":"12 Hours 32 Mins 28 Secs","moonriseLocal":"09:12","moonsetLocal":"20:48","rahuKala":{"name":"Rāhu Kāla","start":"16:36","end":"18:02","startHours":16.592888031051956,"endHours":18.02524753810784,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:18","end":"13:44","startHours":12.295809509884297,"endHours":13.728169016940184,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:10","end":"16:36","startHours":15.160528523996069,"endHours":16.592888031051956,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:14","end":"09:37","startHours":9.240109228165075,"endHours":9.622071763379978,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:03","end":"07:21","startHours":7.043824650679383,"endHours":7.349394678851305,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:55","end":"12:41","startHours":11.913846974669394,"endHours":12.6777720450992,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:02","end":"05:48","startHours":5.038521340801142,"endHours":5.802446411230949,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:37","end":"06:34","startHours":5.611465143623497,"endHours":6.566371481660754,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:12","end":"14:58","startHours":14.205622185958813,"endHours":14.96954725638862,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:50","end":"18:14","startHours":17.825247538107842,"endHours":18.22524753810784,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:02","end":"18:30","startHours":18.02524753810784,"endHours":18.50270070712647,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:47","end":"19:32","startHours":17.77524753810784,"endHours":19.52524753810784,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:55","end":"00:41","startHours":23.913846974669394,"endHours":24.6777720450992,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:34","end":"08:00","startHours":6.566371481660754,"endHours":7.99873098871664,"quality":"inauspicious"},{"name":"Chala","start":"08:00","end":"09:26","startHours":7.99873098871664,"endHours":9.431090495772526,"quality":"neutral"},{"name":"Labha","start":"09:26","end":"10:52","startHours":9.431090495772526,"endHours":10.863450002828412,"quality":"auspicious"},{"name":"Amṛta","start":"10:52","end":"12:18","startHours":10.863450002828412,"endHours":12.295809509884297,"quality":"auspicious"},{"name":"Kāla","start":"12:18","end":"13:44","startHours":12.295809509884297,"endHours":13.728169016940184,"quality":"inauspicious"},{"name":"Śubha","start":"13:44","end":"15:10","startHours":13.728169016940184,"endHours":15.160528523996069,"quality":"auspicious"},{"name":"Roga","start":"15:10","end":"16:36","startHours":15.160528523996069,"endHours":16.592888031051956,"quality":"inauspicious"},{"name":"Udveg","start":"16:36","end":"18:02","startHours":16.592888031051956,"endHours":18.02524753810784,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:02","end":"19:36","startHours":18.02524753810784,"endHours":19.592888031051956,"quality":"auspicious"},{"name":"Roga","start":"19:36","end":"21:10","startHours":19.592888031051956,"endHours":21.16052852399607,"quality":"inauspicious"},{"name":"Udveg","start":"21:10","end":"22:44","startHours":21.16052852399607,"endHours":22.728169016940186,"quality":"inauspicious"},{"name":"Chala","start":"22:44","end":"00:18","startHours":22.728169016940186,"endHours":24.295809509884297,"quality":"neutral"},{"name":"Labha","start":"00:18","end":"01:52","startHours":24.295809509884297,"endHours":25.86345000282841,"quality":"auspicious"},{"name":"Amṛta","start":"01:52","end":"03:26","startHours":25.86345000282841,"endHours":27.431090495772526,"quality":"auspicious"},{"name":"Kāla","start":"03:26","end":"05:00","startHours":27.431090495772526,"endHours":28.998730988716638,"quality":"inauspicious"},{"name":"Śubha","start":"05:00","end":"06:34","startHours":28.998730988716638,"endHours":30.566371481660752,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:34","end":"07:34","startHours":6.566371481660754,"endHours":7.566371481660754,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:34","end":"08:34","startHours":7.566371481660754,"endHours":8.566371481660754,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:34","end":"09:34","startHours":8.566371481660754,"endHours":9.566371481660754,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:34","end":"10:34","startHours":9.566371481660754,"endHours":10.566371481660754,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:34","end":"11:34","startHours":10.566371481660754,"endHours":11.566371481660754,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:34","end":"12:34","startHours":11.566371481660754,"endHours":12.566371481660754,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:34","end":"13:34","startHours":12.566371481660754,"endHours":13.566371481660754,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:34","end":"14:34","startHours":13.566371481660754,"endHours":14.566371481660754,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:34","end":"15:34","startHours":14.566371481660754,"endHours":15.566371481660754,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:34","end":"16:34","startHours":15.566371481660754,"endHours":16.566371481660752,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:34","end":"17:34","startHours":16.566371481660752,"endHours":17.566371481660752,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:34","end":"18:34","startHours":17.566371481660752,"endHours":18.566371481660752,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:34","end":"19:34","startHours":18.566371481660752,"endHours":19.566371481660752,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:34","end":"20:34","startHours":19.566371481660752,"endHours":20.566371481660752,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:34","end":"21:34","startHours":20.566371481660752,"endHours":21.566371481660752,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:34","end":"22:34","startHours":21.566371481660752,"endHours":22.566371481660752,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:34","end":"23:34","startHours":22.566371481660752,"endHours":23.566371481660752,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:34","end":"00:34","startHours":23.566371481660752,"endHours":24.566371481660752,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:34","end":"01:34","startHours":24.566371481660752,"endHours":25.566371481660752,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:34","end":"02:34","startHours":25.566371481660752,"endHours":26.566371481660752,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:34","end":"03:34","startHours":26.566371481660752,"endHours":27.566371481660752,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:34","end":"04:34","startHours":27.566371481660752,"endHours":28.566371481660752,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:34","end":"05:34","startHours":28.566371481660752,"endHours":29.566371481660752,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:34","end":"06:34","startHours":29.566371481660752,"endHours":30.566371481660752,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Citrā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Mithuna","Karka","Tulā","Vṛścika","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Dhanu","Kumbha"]},"dishaShool":"West (Paścim)","chandraVasa":"South-East","rahuVasa":"North-East","anandadiYoga":{"name":"Mausala","quality":"Inauspicious"},"tropicalRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-23.434287031416,"eotMinutes":1.382629406942221,"ayanamsa":25.3194}},"calendars":{"vikram_samvat":2161,"vikram_samvatsara":"Īśvara","saka_samvat":2026,"saka_samvatsara":"Raktākṣī","bengali_samvat":1511,"malayalam_era":1280,"nanakshahi_year":635,"lunar_month":"Mārgaśīrṣa","lunar_month_paksha_full":"Mārgaśīrṣa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Mārgaśīrṣa","lunar_month_amanta":"Mārgaśīrṣa","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":"Mārgaśīrṣa Śukla Caturthī · Vikram 2161 Īśvara · Śaka 2026 Raktākṣī"},"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":"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 21, 2104 CE · Erode, Tamil Nadu · Vidhyamitra","description":"December 21, 2104 CE for Erode, Tamil Nadu: Śukla Caturthī, sūryodaya 06:34, sūryāsta 18:02.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/erode/2104-12-21","hreflang_alternates":{"en":"https://vidhyamitra.com/city/erode/2104-12-21","sa":"https://sa.vidhyamitra.com/city/erode/2104-12-21","hi":"https://hi.vidhyamitra.com/city/erode/2104-12-21","x-default":"https://vidhyamitra.com/city/erode/2104-12-21"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T11:47:27.900Z","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":"2026-05-31T11:47:27.900Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T11:47:27.900Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}