{"id":"vidhyamitra:city-day:erode:1991-08-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/erode/1991-08-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1991-08-18","date_display":"August 18, 1991 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":1991,"month":8,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2448486.770833,"kali_year":5093,"ahargana":1860021.2708,"sun":{"sidereal_longitude":120.2774,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":217.7484,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":97.471,"elapsed_within_tithi_degrees":1.471},"nakshatra":{"number":17,"name":"Anurādhā","pada":2,"moon_longitude":217.7484,"elapsed_within_degrees":4.4151},"yoga":{"number":26,"name":"Indra","sum_longitude":338.0259},"karana":{"half_tithi_index":16,"name":"Bālava"},"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":1991,"month":8,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2448486.770833,"ahargana":1860021.2708,"kali_year":5093,"ayanamsa_lahiri":23.736,"grahas":{"sun":{"sidereal_longitude":120.88305700000001,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":220.19135699999993,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":3},"retrograde":false,"latitude":-3.4139},"mars":{"sidereal_longitude":147.304557,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":128.02695699999998,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":3},"retrograde":true},"jupiter":{"sidereal_longitude":120.64175699999998,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":128.46765699999997,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":3},"retrograde":true},"saturn":{"sidereal_longitude":278.057057,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":267.122,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":87.122,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","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":1991,"month":8,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2448486.770833,"kali_year":5093,"ahargana":1860021.2708,"sun":{"sidereal_longitude":120.2774,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":217.7484,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":97.471,"elapsed_within_tithi_degrees":1.471},"nakshatra":{"number":17,"name":"Anurādhā","pada":2,"moon_longitude":217.7484,"elapsed_within_degrees":4.4151},"yoga":{"number":26,"name":"Indra","sum_longitude":338.0259},"karana":{"half_tithi_index":16,"name":"Bālava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.414,"elongation":97.471},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.414,"opposition_distance":82.529}},"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":"18:37","solarNoonLocal":"12:23","dayLengthHours":12.47931467777835,"dayLengthDisplay":"12 Hours 28 Mins 46 Secs","nightLengthDisplay":"11 Hours 31 Mins 14 Secs","moonriseLocal":"13:15","moonsetLocal":"00:45","rahuKala":{"name":"Rāhu Kāla","start":"17:03","end":"18:37","startHours":17.057397299515387,"endHours":18.61731163423768,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:23","end":"13:56","startHours":12.377654295348506,"endHours":13.9375686300708,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:30","end":"17:03","startHours":15.497482964793093,"endHours":17.057397299515387,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:03","end":"09:28","startHours":9.049837047940946,"endHours":9.465814203866891,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:39","end":"06:59","startHours":6.6579684013667615,"endHours":6.990750126107518,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:58","end":"12:48","startHours":11.96167713942256,"endHours":12.793631451274452,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:28","end":"05:18","startHours":4.474088332755551,"endHours":5.306042644607441,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:06","end":"06:08","startHours":5.098054066644468,"endHours":6.137996956459331,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:27","end":"15:17","startHours":14.45754007497823,"endHours":15.28949438683012,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:25","end":"18:49","startHours":18.41731163423768,"endHours":18.81731163423768,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:37","end":"19:08","startHours":18.61731163423768,"endHours":19.13728307914511,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:22","end":"20:07","startHours":18.36731163423768,"endHours":20.11731163423768,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:58","end":"00:48","startHours":23.961677139422562,"endHours":24.79363145127445,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:08","end":"07:42","startHours":6.137996956459331,"endHours":7.697911291181624,"quality":"inauspicious"},{"name":"Chala","start":"07:42","end":"09:15","startHours":7.697911291181624,"endHours":9.257825625903918,"quality":"neutral"},{"name":"Labha","start":"09:15","end":"10:49","startHours":9.257825625903918,"endHours":10.817739960626213,"quality":"auspicious"},{"name":"Amṛta","start":"10:49","end":"12:23","startHours":10.817739960626213,"endHours":12.377654295348506,"quality":"auspicious"},{"name":"Kāla","start":"12:23","end":"13:56","startHours":12.377654295348506,"endHours":13.9375686300708,"quality":"inauspicious"},{"name":"Śubha","start":"13:56","end":"15:30","startHours":13.9375686300708,"endHours":15.497482964793093,"quality":"auspicious"},{"name":"Roga","start":"15:30","end":"17:03","startHours":15.497482964793093,"endHours":17.057397299515387,"quality":"inauspicious"},{"name":"Udveg","start":"17:03","end":"18:37","startHours":17.057397299515387,"endHours":18.61731163423768,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:37","end":"20:03","startHours":18.61731163423768,"endHours":20.057397299515387,"quality":"auspicious"},{"name":"Roga","start":"20:03","end":"21:30","startHours":20.057397299515387,"endHours":21.497482964793093,"quality":"inauspicious"},{"name":"Udveg","start":"21:30","end":"22:56","startHours":21.497482964793093,"endHours":22.9375686300708,"quality":"inauspicious"},{"name":"Chala","start":"22:56","end":"00:23","startHours":22.9375686300708,"endHours":24.377654295348506,"quality":"neutral"},{"name":"Labha","start":"00:23","end":"01:49","startHours":24.377654295348506,"endHours":25.817739960626213,"quality":"auspicious"},{"name":"Amṛta","start":"01:49","end":"03:15","startHours":25.817739960626213,"endHours":27.25782562590392,"quality":"auspicious"},{"name":"Kāla","start":"03:15","end":"04:42","startHours":27.25782562590392,"endHours":28.697911291181626,"quality":"inauspicious"},{"name":"Śubha","start":"04:42","end":"06:08","startHours":28.697911291181626,"endHours":30.137996956459332,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:08","end":"07:08","startHours":6.137996956459331,"endHours":7.137996956459331,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:08","end":"08:08","startHours":7.137996956459331,"endHours":8.13799695645933,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:08","end":"09:08","startHours":8.13799695645933,"endHours":9.13799695645933,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:08","end":"10:08","startHours":9.13799695645933,"endHours":10.13799695645933,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:08","end":"11:08","startHours":10.13799695645933,"endHours":11.13799695645933,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:08","end":"12:08","startHours":11.13799695645933,"endHours":12.13799695645933,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:08","end":"13:08","startHours":12.13799695645933,"endHours":13.13799695645933,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:08","end":"14:08","startHours":13.13799695645933,"endHours":14.13799695645933,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:08","end":"15:08","startHours":14.13799695645933,"endHours":15.13799695645933,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:08","end":"16:08","startHours":15.13799695645933,"endHours":16.137996956459332,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:08","end":"17:08","startHours":16.137996956459332,"endHours":17.137996956459332,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:08","end":"18:08","startHours":17.137996956459332,"endHours":18.137996956459332,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:08","end":"19:08","startHours":18.137996956459332,"endHours":19.137996956459332,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:08","end":"20:08","startHours":19.137996956459332,"endHours":20.137996956459332,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:08","end":"21:08","startHours":20.137996956459332,"endHours":21.137996956459332,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:08","end":"22:08","startHours":21.137996956459332,"endHours":22.137996956459332,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:08","end":"23:08","startHours":22.137996956459332,"endHours":23.137996956459332,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:08","end":"00:08","startHours":23.137996956459332,"endHours":24.137996956459332,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:08","end":"01:08","startHours":24.137996956459332,"endHours":25.137996956459332,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:08","end":"02:08","startHours":25.137996956459332,"endHours":26.137996956459332,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:08","end":"03:08","startHours":26.137996956459332,"endHours":27.137996956459332,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:08","end":"04:08","startHours":27.137996956459332,"endHours":28.137996956459332,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:08","end":"05:08","startHours":28.137996956459332,"endHours":29.137996956459332,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:08","end":"06:08","startHours":29.137996956459332,"endHours":30.137996956459332,"planetary_lord":"Jupiter"}],"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","Siṃha","Kanyā","Vṛścika","Makara"],"unfavorable_rashis":["Mithuna","Karka","Tulā","Dhanu","Kumbha","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"North-East","rahuVasa":"North-East","anandadiYoga":{"name":"Mṛtyu","quality":"Inauspicious"},"tropicalRitu":"Varṣā (Monsoon)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":13.314209525581855,"eotMinutes":-3.5280577209103767,"ayanamsa":23.736}},"calendars":{"vikram_samvat":2048,"vikram_samvatsara":"Tāraṇa","saka_samvat":1913,"saka_samvatsara":"Prajāpati","bengali_samvat":1398,"malayalam_era":1167,"nanakshahi_year":522,"lunar_month":"Śrāvaṇa","lunar_month_paksha_full":"Śrāvaṇa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Śrāvaṇa","lunar_month_amanta":"Śrāvaṇa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Siṃha (Āvaṇi)","ritu":"Varṣā (Monsoon)","display_summary":"Śrāvaṇa Śukla Navamī · Vikram 2048 Tāraṇa · Śaka 1913 Prajāpati"},"festivals":[],"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":[{"historical_date":"-1626101-04-03","event":"Bhagavān Rāma's birth at Ayodhyā","chart_id":"rama","shared_marker":"same Śukla Navamī","url":"/day/-1626101-04-03","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 August 18, 1991 CE · Erode, Tamil Nadu · Vidhyamitra","description":"August 18, 1991 CE for Erode, Tamil Nadu: Śukla Navamī, sūryodaya 06:08, sūryāsta 18:37.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/erode/1991-08-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/erode/1991-08-18","sa":"https://sa.vidhyamitra.com/city/erode/1991-08-18","hi":"https://hi.vidhyamitra.com/city/erode/1991-08-18","x-default":"https://vidhyamitra.com/city/erode/1991-08-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T22:13:19.416Z","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":"2026-06-01T22:13:19.416Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T22:13:19.416Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}