{"id":"vidhyamitra:city-day:erode:1980-10-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/erode/1980-10-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1980-10-18","date_display":"October 18, 1980 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":1980,"month":10,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444530.770833,"kali_year":5082,"ahargana":1856065.2708,"sun":{"sidereal_longitude":180.554,"rashi":7,"rashi_name":"Tulā"},"moon":{"sidereal_longitude":285.1238,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":104.5698,"elapsed_within_tithi_degrees":8.5698},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2,"moon_longitude":285.1238,"elapsed_within_degrees":5.1238},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":105.6778},"karana":{"half_tithi_index":17,"name":"Kaulava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"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":1980,"month":10,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444530.770833,"ahargana":1856065.2708,"kali_year":5082,"ayanamsa_lahiri":23.5847,"grahas":{"sun":{"sidereal_longitude":181.23510499999998,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":282.022605,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":false,"latitude":0.9044},"mars":{"sidereal_longitude":220.87260500000002,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":205.375405,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":2},"retrograde":true},"jupiter":{"sidereal_longitude":154.53880500000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3},"retrograde":false},"venus":{"sidereal_longitude":141.94010500000002,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":159.403005,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":116.7299,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":296.7299,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","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":1980,"month":10,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444530.770833,"kali_year":5082,"ahargana":1856065.2708,"sun":{"sidereal_longitude":180.554,"rashi":7,"rashi_name":"Tulā"},"moon":{"sidereal_longitude":285.1238,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":104.5698,"elapsed_within_tithi_degrees":8.5698},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2,"moon_longitude":285.1238,"elapsed_within_degrees":5.1238},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":105.6778},"karana":{"half_tithi_index":17,"name":"Kaulava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":0.904,"elongation":104.57},"lunar":{"type":"lunar","occurs":false,"moon_latitude":0.904,"opposition_distance":75.43}},"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":"17:59","solarNoonLocal":"12:04","dayLengthHours":11.855429912992594,"dayLengthDisplay":"11 Hours 51 Mins 20 Secs","nightLengthDisplay":"12 Hours 08 Mins 40 Secs","moonriseLocal":"13:00","moonsetLocal":"00:34","rahuKala":{"name":"Rāhu Kāla","start":"09:06","end":"10:35","startHours":9.098401551698212,"endHours":10.580330290822285,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:33","end":"15:02","startHours":13.544187769070433,"endHours":15.026116508194509,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:08","end":"07:37","startHours":6.134544073450063,"endHours":7.616472812574138,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:54","end":"09:18","startHours":8.900811053148335,"endHours":9.295992050248088,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:38","end":"06:57","startHours":6.628520319824754,"endHours":6.944665117504557,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:40","end":"12:27","startHours":11.667078032846605,"endHours":12.457440027046113,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:33","end":"05:21","startHours":4.553820085051051,"endHours":5.344182079250556,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:09","end":"06:08","startHours":5.14659158070068,"endHours":6.134544073450063,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:02","end":"14:50","startHours":14.038164015445126,"endHours":14.828526009644632,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:47","end":"18:11","startHours":17.789973986442657,"endHours":18.189973986442656,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:59","end":"18:29","startHours":17.989973986442656,"endHours":18.48395023281735,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:44","end":"19:29","startHours":17.739973986442656,"endHours":19.489973986442656,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:40","end":"00:27","startHours":23.667078032846607,"endHours":24.457440027046115,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"06:08","end":"07:37","startHours":6.134544073450063,"endHours":7.616472812574138,"quality":"inauspicious"},{"name":"Śubha","start":"07:37","end":"09:06","startHours":7.616472812574138,"endHours":9.098401551698212,"quality":"auspicious"},{"name":"Roga","start":"09:06","end":"10:35","startHours":9.098401551698212,"endHours":10.580330290822285,"quality":"inauspicious"},{"name":"Udveg","start":"10:35","end":"12:04","startHours":10.580330290822285,"endHours":12.062259029946361,"quality":"inauspicious"},{"name":"Chala","start":"12:04","end":"13:33","startHours":12.062259029946361,"endHours":13.544187769070433,"quality":"neutral"},{"name":"Labha","start":"13:33","end":"15:02","startHours":13.544187769070433,"endHours":15.026116508194509,"quality":"auspicious"},{"name":"Amṛta","start":"15:02","end":"16:30","startHours":15.026116508194509,"endHours":16.508045247318584,"quality":"auspicious"},{"name":"Kāla","start":"16:30","end":"17:59","startHours":16.508045247318584,"endHours":17.989973986442656,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"17:59","end":"19:30","startHours":17.989973986442656,"endHours":19.50804524731858,"quality":"auspicious"},{"name":"Amṛta","start":"19:30","end":"21:02","startHours":19.50804524731858,"endHours":21.02611650819451,"quality":"auspicious"},{"name":"Kāla","start":"21:02","end":"22:33","startHours":21.02611650819451,"endHours":22.544187769070433,"quality":"inauspicious"},{"name":"Śubha","start":"22:33","end":"00:04","startHours":22.544187769070433,"endHours":24.06225902994636,"quality":"auspicious"},{"name":"Roga","start":"00:04","end":"01:35","startHours":24.06225902994636,"endHours":25.580330290822285,"quality":"inauspicious"},{"name":"Udveg","start":"01:35","end":"03:06","startHours":25.580330290822285,"endHours":27.09840155169821,"quality":"inauspicious"},{"name":"Chala","start":"03:06","end":"04:37","startHours":27.09840155169821,"endHours":28.616472812574138,"quality":"neutral"},{"name":"Labha","start":"04:37","end":"06:08","startHours":28.616472812574138,"endHours":30.134544073450062,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:08","end":"07:08","startHours":6.134544073450063,"endHours":7.134544073450063,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"07:08","end":"08:08","startHours":7.134544073450063,"endHours":8.134544073450062,"planetary_lord":"Moon"},{"name":"Hora 3","start":"08:08","end":"09:08","startHours":8.134544073450062,"endHours":9.134544073450062,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"09:08","end":"10:08","startHours":9.134544073450062,"endHours":10.134544073450062,"planetary_lord":"Venus"},{"name":"Hora 5","start":"10:08","end":"11:08","startHours":10.134544073450062,"endHours":11.134544073450062,"planetary_lord":"Sun"},{"name":"Hora 6","start":"11:08","end":"12:08","startHours":11.134544073450062,"endHours":12.134544073450062,"planetary_lord":"Mars"},{"name":"Hora 7","start":"12:08","end":"13:08","startHours":12.134544073450062,"endHours":13.134544073450062,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"13:08","end":"14:08","startHours":13.134544073450062,"endHours":14.134544073450062,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"14:08","end":"15:08","startHours":14.134544073450062,"endHours":15.134544073450062,"planetary_lord":"Moon"},{"name":"Hora 10","start":"15:08","end":"16:08","startHours":15.134544073450062,"endHours":16.134544073450062,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"16:08","end":"17:08","startHours":16.134544073450062,"endHours":17.134544073450062,"planetary_lord":"Venus"},{"name":"Hora 12","start":"17:08","end":"18:08","startHours":17.134544073450062,"endHours":18.134544073450062,"planetary_lord":"Sun"},{"name":"Hora 13","start":"18:08","end":"19:08","startHours":18.134544073450062,"endHours":19.134544073450062,"planetary_lord":"Mars"},{"name":"Hora 14","start":"19:08","end":"20:08","startHours":19.134544073450062,"endHours":20.134544073450062,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"20:08","end":"21:08","startHours":20.134544073450062,"endHours":21.134544073450062,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"21:08","end":"22:08","startHours":21.134544073450062,"endHours":22.134544073450062,"planetary_lord":"Moon"},{"name":"Hora 17","start":"22:08","end":"23:08","startHours":22.134544073450062,"endHours":23.134544073450062,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"23:08","end":"00:08","startHours":23.134544073450062,"endHours":24.134544073450062,"planetary_lord":"Venus"},{"name":"Hora 19","start":"00:08","end":"01:08","startHours":24.134544073450062,"endHours":25.134544073450062,"planetary_lord":"Sun"},{"name":"Hora 20","start":"01:08","end":"02:08","startHours":25.134544073450062,"endHours":26.134544073450062,"planetary_lord":"Mars"},{"name":"Hora 21","start":"02:08","end":"03:08","startHours":26.134544073450062,"endHours":27.134544073450062,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"03:08","end":"04:08","startHours":27.134544073450062,"endHours":28.134544073450062,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"04:08","end":"05:08","startHours":28.134544073450062,"endHours":29.134544073450062,"planetary_lord":"Moon"},{"name":"Hora 24","start":"05:08","end":"06:08","startHours":29.134544073450062,"endHours":30.134544073450062,"planetary_lord":"Mercury"}],"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":"East (Pūrva)","chandraVasa":"South-East","rahuVasa":"East","anandadiYoga":{"name":"Kāṇa","quality":"Inauspicious"},"tropicalRitu":"Śarad (Autumn)","vedicRitu":"Śarad (Autumn)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-9.610794294400241,"eotMinutes":15.395658203218455,"ayanamsa":23.5847}},"calendars":{"vikram_samvat":2037,"vikram_samvatsara":"Śrīmukha","saka_samvat":1902,"saka_samvatsara":"Raudra","bengali_samvat":1387,"malayalam_era":1156,"nanakshahi_year":511,"lunar_month":"Āśvina","lunar_month_paksha_full":"Āśvina Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Āśvina","lunar_month_amanta":"Āśvina","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Tulā (Aippasi)","ritu":"Śarad (Autumn)","display_summary":"Āśvina Śukla Navamī · Vikram 2037 Śrīmukha · Śaka 1902 Raudra"},"festivals":[{"id":"mahanavami","name":"Mahā-Navamī","name_sanskrit":"महानवमी","tradition":"Shakta","associated_deity":"Devī Durgā","significance":"9th day of Śāradīya Navrātri; Devī's final victory.","vrata":true,"detection":{"tithi_number":9,"tithi_paksha":"Śukla","lunar_month":"Āśvina"},"precedence":1}],"todays_walk":{"walk":{"id":"shani-walk","name":"Śani Walk","name_sanskrit":"शनि यात्रा","type":"graha","description":"Tapas + endurance + BG 17.14-19.","step_count":7,"url":"/walk/shani-walk"},"reason":"Śanivāra (Saturday) — 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 October 18, 1980 CE · Erode, Tamil Nadu · Vidhyamitra","description":"October 18, 1980 CE for Erode, Tamil Nadu: Śukla Navamī, sūryodaya 06:08, sūryāsta 17:59.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/erode/1980-10-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/erode/1980-10-18","sa":"https://sa.vidhyamitra.com/city/erode/1980-10-18","hi":"https://hi.vidhyamitra.com/city/erode/1980-10-18","x-default":"https://vidhyamitra.com/city/erode/1980-10-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-30T23:53:21.198Z","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":"2026-05-30T23:53:21.198Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-30T23:53:21.198Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}