{"id":"vidhyamitra:city-day:erode:2171-09-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/erode/2171-09-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2171-09-18","date_display":"September 18, 2171 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":2171,"month":9,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2514261.770833,"kali_year":5273,"ahargana":1925796.2708,"sun":{"sidereal_longitude":147.6802,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":13.278,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":225.5978,"elapsed_within_tithi_degrees":9.5978},"nakshatra":{"number":1,"name":"Aśvinī","pada":4,"moon_longitude":13.278,"elapsed_within_degrees":13.278},"yoga":{"number":13,"name":"Vyāghāta","sum_longitude":160.9582},"karana":{"half_tithi_index":37,"name":"Bālava"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"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":2171,"month":9,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2514261.770833,"ahargana":1925796.2708,"kali_year":5273,"ayanamsa_lahiri":26.2517,"grahas":{"sun":{"sidereal_longitude":148.824769,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":11.05126899999999,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":4},"retrograde":false,"latitude":-0.6853},"mars":{"sidereal_longitude":106.532669,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":165.704969,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":173.52466900000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":167.150169,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":316.42356900000004,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3},"retrograde":true},"rahu":{"sidereal_longitude":22.046,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":202.046,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","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":2171,"month":9,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2514261.770833,"kali_year":5273,"ahargana":1925796.2708,"sun":{"sidereal_longitude":147.6802,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":13.278,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":225.5978,"elapsed_within_tithi_degrees":9.5978},"nakshatra":{"number":1,"name":"Aśvinī","pada":4,"moon_longitude":13.278,"elapsed_within_degrees":13.278},"yoga":{"number":13,"name":"Vyāghāta","sum_longitude":160.9582},"karana":{"half_tithi_index":37,"name":"Bālava"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-0.685,"elongation":134.402},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-0.685,"opposition_distance":45.598}},"eclipse_window_40days":[]},"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":"06:08","sunsetLocal":"18:17","solarNoonLocal":"12:13","dayLengthHours":12.165686853702146,"dayLengthDisplay":"12 Hours 09 Mins 56 Secs","nightLengthDisplay":"11 Hours 50 Mins 04 Secs","moonriseLocal":"20:48","moonsetLocal":"09:15","rahuKala":{"name":"Rāhu Kāla","start":"12:13","end":"13:44","startHours":12.208686297105427,"endHours":13.729397153818196,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"07:39","end":"09:10","startHours":7.646553726967123,"endHours":9.167264583679891,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:41","end":"12:13","startHours":10.687975440392659,"endHours":12.208686297105427,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:58","end":"09:22","startHours":8.96450313611819,"endHours":9.370026031241594,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:38","end":"06:57","startHours":6.6327464891586105,"endHours":6.957164805257334,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:48","end":"12:37","startHours":11.803163401982022,"endHours":12.61420919222883,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:30","end":"05:19","startHours":4.503751289760735,"endHours":5.314797080007544,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:07","end":"06:08","startHours":5.112035632445842,"endHours":6.125842870254354,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:14","end":"15:03","startHours":14.236300772722453,"endHours":15.047346562969263,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:05","end":"18:29","startHours":18.0915297239565,"endHours":18.4915297239565,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:17","end":"18:48","startHours":18.2915297239565,"endHours":18.798433342860758,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:02","end":"19:47","startHours":18.0415297239565,"endHours":19.7915297239565,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:48","end":"00:37","startHours":23.803163401982022,"endHours":24.61420919222883,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"06:08","end":"07:39","startHours":6.125842870254354,"endHours":7.646553726967123,"quality":"auspicious"},{"name":"Amṛta","start":"07:39","end":"09:10","startHours":7.646553726967123,"endHours":9.167264583679891,"quality":"auspicious"},{"name":"Kāla","start":"09:10","end":"10:41","startHours":9.167264583679891,"endHours":10.687975440392659,"quality":"inauspicious"},{"name":"Śubha","start":"10:41","end":"12:13","startHours":10.687975440392659,"endHours":12.208686297105427,"quality":"auspicious"},{"name":"Roga","start":"12:13","end":"13:44","startHours":12.208686297105427,"endHours":13.729397153818196,"quality":"inauspicious"},{"name":"Udveg","start":"13:44","end":"15:15","startHours":13.729397153818196,"endHours":15.250108010530964,"quality":"inauspicious"},{"name":"Chala","start":"15:15","end":"16:46","startHours":15.250108010530964,"endHours":16.770818867243733,"quality":"neutral"},{"name":"Labha","start":"16:46","end":"18:17","startHours":16.770818867243733,"endHours":18.2915297239565,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"18:17","end":"19:46","startHours":18.2915297239565,"endHours":19.770818867243733,"quality":"inauspicious"},{"name":"Chala","start":"19:46","end":"21:15","startHours":19.770818867243733,"endHours":21.250108010530965,"quality":"neutral"},{"name":"Labha","start":"21:15","end":"22:44","startHours":21.250108010530965,"endHours":22.729397153818198,"quality":"auspicious"},{"name":"Amṛta","start":"22:44","end":"00:13","startHours":22.729397153818198,"endHours":24.208686297105427,"quality":"auspicious"},{"name":"Kāla","start":"00:13","end":"01:41","startHours":24.208686297105427,"endHours":25.68797544039266,"quality":"inauspicious"},{"name":"Śubha","start":"01:41","end":"03:10","startHours":25.68797544039266,"endHours":27.16726458367989,"quality":"auspicious"},{"name":"Roga","start":"03:10","end":"04:39","startHours":27.16726458367989,"endHours":28.64655372696712,"quality":"inauspicious"},{"name":"Udveg","start":"04:39","end":"06:08","startHours":28.64655372696712,"endHours":30.125842870254353,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:08","end":"07:08","startHours":6.125842870254354,"endHours":7.125842870254354,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"07:08","end":"08:08","startHours":7.125842870254354,"endHours":8.125842870254354,"planetary_lord":"Venus"},{"name":"Hora 3","start":"08:08","end":"09:08","startHours":8.125842870254354,"endHours":9.125842870254354,"planetary_lord":"Sun"},{"name":"Hora 4","start":"09:08","end":"10:08","startHours":9.125842870254354,"endHours":10.125842870254354,"planetary_lord":"Mars"},{"name":"Hora 5","start":"10:08","end":"11:08","startHours":10.125842870254354,"endHours":11.125842870254354,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"11:08","end":"12:08","startHours":11.125842870254354,"endHours":12.125842870254354,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"12:08","end":"13:08","startHours":12.125842870254354,"endHours":13.125842870254354,"planetary_lord":"Moon"},{"name":"Hora 8","start":"13:08","end":"14:08","startHours":13.125842870254354,"endHours":14.125842870254354,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"14:08","end":"15:08","startHours":14.125842870254354,"endHours":15.125842870254354,"planetary_lord":"Venus"},{"name":"Hora 10","start":"15:08","end":"16:08","startHours":15.125842870254354,"endHours":16.125842870254353,"planetary_lord":"Sun"},{"name":"Hora 11","start":"16:08","end":"17:08","startHours":16.125842870254353,"endHours":17.125842870254353,"planetary_lord":"Mars"},{"name":"Hora 12","start":"17:08","end":"18:08","startHours":17.125842870254353,"endHours":18.125842870254353,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"18:08","end":"19:08","startHours":18.125842870254353,"endHours":19.125842870254353,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"19:08","end":"20:08","startHours":19.125842870254353,"endHours":20.125842870254353,"planetary_lord":"Moon"},{"name":"Hora 15","start":"20:08","end":"21:08","startHours":20.125842870254353,"endHours":21.125842870254353,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"21:08","end":"22:08","startHours":21.125842870254353,"endHours":22.125842870254353,"planetary_lord":"Venus"},{"name":"Hora 17","start":"22:08","end":"23:08","startHours":22.125842870254353,"endHours":23.125842870254353,"planetary_lord":"Sun"},{"name":"Hora 18","start":"23:08","end":"00:08","startHours":23.125842870254353,"endHours":24.125842870254353,"planetary_lord":"Mars"},{"name":"Hora 19","start":"00:08","end":"01:08","startHours":24.125842870254353,"endHours":25.125842870254353,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"01:08","end":"02:08","startHours":25.125842870254353,"endHours":26.125842870254353,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"02:08","end":"03:08","startHours":26.125842870254353,"endHours":27.125842870254353,"planetary_lord":"Moon"},{"name":"Hora 22","start":"03:08","end":"04:08","startHours":27.125842870254353,"endHours":28.125842870254353,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"04:08","end":"05:08","startHours":28.125842870254353,"endHours":29.125842870254353,"planetary_lord":"Venus"},{"name":"Hora 24","start":"05:08","end":"06:08","startHours":29.125842870254353,"endHours":30.125842870254353,"planetary_lord":"Sun"}],"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":"North (Uttara)","chandraVasa":"East","rahuVasa":"South-West","anandadiYoga":{"name":"Mānasa","quality":"Auspicious"},"tropicalRitu":"Varṣā (Monsoon) (tropical)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":1.9562189913651251,"eotMinutes":6.610022173674397,"ayanamsa":26.2517}},"calendars":{"vikram_samvat":2228,"vikram_samvatsara":"Tāraṇa","saka_samvat":2093,"saka_samvatsara":"Prajāpati","bengali_samvat":1578,"malayalam_era":1347,"nanakshahi_year":702,"lunar_month":"Āśvina","lunar_month_paksha_full":"Āśvina Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Āśvina","lunar_month_amanta":"Bhādrapada","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Siṃha (Āvaṇi)","ritu":"Śarad (Autumn)","display_summary":"Āśvina Kṛṣṇa Caturthī · Vikram 2228 Tāraṇa · Śaka 2093 Prajāpati"},"festivals":[{"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":"budha-walk","name":"Budha Walk","name_sanskrit":"बुध यात्रा","type":"graha","description":"Discrimination + BG 2.41 (vyavasāyātmikā buddhi).","step_count":6,"url":"/walk/budha-walk"},"reason":"Budhavāra (Wednesday) — 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":"erode"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga September 18, 2171 CE · Erode, Tamil Nadu · Vidhyamitra","description":"September 18, 2171 CE for Erode, Tamil Nadu: Kṛṣṇa Caturthī, sūryodaya 06:08, sūryāsta 18:17.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/erode/2171-09-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/erode/2171-09-18","sa":"https://sa.vidhyamitra.com/city/erode/2171-09-18","hi":"https://hi.vidhyamitra.com/city/erode/2171-09-18","x-default":"https://vidhyamitra.com/city/erode/2171-09-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T06:55:03.920Z","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":"2026-06-01T06:55:03.920Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T06:55:03.920Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}