{"id":"vidhyamitra:city-day:thane:1983-12-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/thane/1983-12-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1983-12-13","date_display":"December 13, 1983 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":1983,"month":12,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2445681.770833,"kali_year":5085,"ahargana":1857216.2708,"sun":{"sidereal_longitude":236.4549,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":333.5715,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":97.1166,"elapsed_within_tithi_degrees":1.1166},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1,"moon_longitude":333.5715,"elapsed_within_degrees":0.2382},"yoga":{"number":16,"name":"Siddhi","sum_longitude":210.0265},"karana":{"half_tithi_index":16,"name":"Bālava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"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":1983,"month":12,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2445681.770833,"ahargana":1857216.2708,"kali_year":5085,"ayanamsa_lahiri":23.6288,"grahas":{"sun":{"sidereal_longitude":236.822629,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":332.132529,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":4},"retrograde":false,"latitude":-4.458},"mars":{"sidereal_longitude":170.79602899999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":257.69832900000006,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":238.891029,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":193.97542900000008,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":198.15932900000007,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":55.7444,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":235.7444,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","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":1983,"month":12,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2445681.770833,"kali_year":5085,"ahargana":1857216.2708,"sun":{"sidereal_longitude":236.4549,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":333.5715,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":97.1166,"elapsed_within_tithi_degrees":1.1166},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1,"moon_longitude":333.5715,"elapsed_within_degrees":0.2382},"yoga":{"number":16,"name":"Siddhi","sum_longitude":210.0265},"karana":{"half_tithi_index":16,"name":"Bālava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.458,"elongation":97.117},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.458,"opposition_distance":82.883}},"eclipse_window_40days":[{"offset_days":7,"type":"lunar","occurs":true,"moon_latitude":0.497,"opposition_distance":1.914}]},"city":{"slug":"thane","name":"Thane, Maharashtra","lat":19.2183,"lon":72.9781,"tz_offset_hours":5.5,"state":"Maharashtra","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"thane","name":"Thane, Maharashtra","lat":19.2183,"lon":72.9781,"tz_offset_hours":5.5,"state":"Maharashtra","country":"IN","tier":"tier-1"},"sunriseLocal":"07:03","sunsetLocal":"18:03","solarNoonLocal":"12:33","dayLengthHours":10.98941652212744,"dayLengthDisplay":"10 Hours 59 Mins 22 Secs","nightLengthDisplay":"13 Hours 00 Mins 38 Secs","moonriseLocal":"12:54","moonsetLocal":"00:54","rahuKala":{"name":"Rāhu Kāla","start":"15:18","end":"16:40","startHours":15.297303293041558,"endHours":16.67098035830749,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:48","end":"11:11","startHours":9.80259503197784,"endHours":11.176272097243768,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:33","end":"13:55","startHours":12.549949162509698,"endHours":13.923626227775628,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:37","end":"09:59","startHours":9.619438089942381,"endHours":9.985751974013297,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:31","end":"07:48","startHours":7.513133256534622,"endHours":7.8061843637913535,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:11","end":"12:55","startHours":12.183635278438784,"endHours":12.916263046580612,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:35","end":"06:19","startHours":5.58998536516232,"endHours":6.3226131333041495,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:08","end":"07:03","startHours":6.1394561912686925,"endHours":7.055240901445979,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:23","end":"15:07","startHours":14.381518582864272,"endHours":15.114146351006102,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:51","end":"18:15","startHours":17.84465742357342,"endHours":18.24465742357342,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:03","end":"18:30","startHours":18.04465742357342,"endHours":18.50254977866206,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:48","end":"19:33","startHours":17.79465742357342,"endHours":19.54465742357342,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:11","end":"00:55","startHours":24.183635278438782,"endHours":24.916263046580614,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"07:03","end":"08:26","startHours":7.055240901445979,"endHours":8.428917966711909,"quality":"inauspicious"},{"name":"Udveg","start":"08:26","end":"09:48","startHours":8.428917966711909,"endHours":9.80259503197784,"quality":"inauspicious"},{"name":"Chala","start":"09:48","end":"11:11","startHours":9.80259503197784,"endHours":11.176272097243768,"quality":"neutral"},{"name":"Labha","start":"11:11","end":"12:33","startHours":11.176272097243768,"endHours":12.549949162509698,"quality":"auspicious"},{"name":"Amṛta","start":"12:33","end":"13:55","startHours":12.549949162509698,"endHours":13.923626227775628,"quality":"auspicious"},{"name":"Kāla","start":"13:55","end":"15:18","startHours":13.923626227775628,"endHours":15.297303293041558,"quality":"inauspicious"},{"name":"Śubha","start":"15:18","end":"16:40","startHours":15.297303293041558,"endHours":16.67098035830749,"quality":"auspicious"},{"name":"Roga","start":"16:40","end":"18:03","startHours":16.67098035830749,"endHours":18.04465742357342,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"18:03","end":"19:40","startHours":18.04465742357342,"endHours":19.67098035830749,"quality":"inauspicious"},{"name":"Śubha","start":"19:40","end":"21:18","startHours":19.67098035830749,"endHours":21.29730329304156,"quality":"auspicious"},{"name":"Roga","start":"21:18","end":"22:55","startHours":21.29730329304156,"endHours":22.923626227775628,"quality":"inauspicious"},{"name":"Udveg","start":"22:55","end":"00:33","startHours":22.923626227775628,"endHours":24.549949162509698,"quality":"inauspicious"},{"name":"Chala","start":"00:33","end":"02:11","startHours":24.549949162509698,"endHours":26.176272097243768,"quality":"neutral"},{"name":"Labha","start":"02:11","end":"03:48","startHours":26.176272097243768,"endHours":27.802595031977837,"quality":"auspicious"},{"name":"Amṛta","start":"03:48","end":"05:26","startHours":27.802595031977837,"endHours":29.428917966711907,"quality":"auspicious"},{"name":"Kāla","start":"05:26","end":"07:03","startHours":29.428917966711907,"endHours":31.055240901445977,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:03","end":"08:03","startHours":7.055240901445979,"endHours":8.055240901445979,"planetary_lord":"Mars"},{"name":"Hora 2","start":"08:03","end":"09:03","startHours":8.055240901445979,"endHours":9.055240901445979,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"09:03","end":"10:03","startHours":9.055240901445979,"endHours":10.055240901445979,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"10:03","end":"11:03","startHours":10.055240901445979,"endHours":11.055240901445979,"planetary_lord":"Moon"},{"name":"Hora 5","start":"11:03","end":"12:03","startHours":11.055240901445979,"endHours":12.055240901445979,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"12:03","end":"13:03","startHours":12.055240901445979,"endHours":13.055240901445979,"planetary_lord":"Venus"},{"name":"Hora 7","start":"13:03","end":"14:03","startHours":13.055240901445979,"endHours":14.055240901445979,"planetary_lord":"Sun"},{"name":"Hora 8","start":"14:03","end":"15:03","startHours":14.055240901445979,"endHours":15.055240901445979,"planetary_lord":"Mars"},{"name":"Hora 9","start":"15:03","end":"16:03","startHours":15.055240901445979,"endHours":16.055240901445977,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"16:03","end":"17:03","startHours":16.055240901445977,"endHours":17.055240901445977,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"17:03","end":"18:03","startHours":17.055240901445977,"endHours":18.055240901445977,"planetary_lord":"Moon"},{"name":"Hora 12","start":"18:03","end":"19:03","startHours":18.055240901445977,"endHours":19.055240901445977,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"19:03","end":"20:03","startHours":19.055240901445977,"endHours":20.055240901445977,"planetary_lord":"Venus"},{"name":"Hora 14","start":"20:03","end":"21:03","startHours":20.055240901445977,"endHours":21.055240901445977,"planetary_lord":"Sun"},{"name":"Hora 15","start":"21:03","end":"22:03","startHours":21.055240901445977,"endHours":22.055240901445977,"planetary_lord":"Mars"},{"name":"Hora 16","start":"22:03","end":"23:03","startHours":22.055240901445977,"endHours":23.055240901445977,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"23:03","end":"00:03","startHours":23.055240901445977,"endHours":24.055240901445977,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"00:03","end":"01:03","startHours":24.055240901445977,"endHours":25.055240901445977,"planetary_lord":"Moon"},{"name":"Hora 19","start":"01:03","end":"02:03","startHours":25.055240901445977,"endHours":26.055240901445977,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"02:03","end":"03:03","startHours":26.055240901445977,"endHours":27.055240901445977,"planetary_lord":"Venus"},{"name":"Hora 21","start":"03:03","end":"04:03","startHours":27.055240901445977,"endHours":28.055240901445977,"planetary_lord":"Sun"},{"name":"Hora 22","start":"04:03","end":"05:03","startHours":28.055240901445977,"endHours":29.055240901445977,"planetary_lord":"Mars"},{"name":"Hora 23","start":"05:03","end":"06:03","startHours":29.055240901445977,"endHours":30.055240901445977,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"06:03","end":"07:03","startHours":30.055240901445977,"endHours":31.055240901445977,"planetary_lord":"Saturn"}],"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":["Vṛṣabha","Siṃha","Kanyā","Dhanu","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Karka","Tulā","Vṛścika","Kumbha"]},"dishaShool":"North (Uttara)","chandraVasa":"South-West","rahuVasa":"North","anandadiYoga":{"name":"Dhvānkṣa","quality":"Inauspicious"},"tropicalRitu":"Hemanta (Pre-winter) (tropical)","vedicRitu":"Śarad (Autumn)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-23.09283019558093,"eotMinutes":5.090650249418121,"ayanamsa":23.6288}},"calendars":{"vikram_samvat":2040,"vikram_samvatsara":"Dhātṛ","saka_samvat":1905,"saka_samvatsara":"Rudhirodgāri","bengali_samvat":1390,"malayalam_era":1159,"nanakshahi_year":514,"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":"Vṛścika (Kārttikai)","ritu":"Hemanta (Pre-winter)","display_summary":"Mārgaśīrṣa Śukla Navamī · Vikram 2040 Dhātṛ · Śaka 1905 Rudhirodgāri"},"festivals":[],"todays_walk":{"walk":{"id":"mangala-walk","name":"Maṅgala Walk","name_sanskrit":"मङ्गल यात्रा","type":"graha","description":"Right action + BG 2.31-38 (kṣatriya-dharma).","step_count":7,"url":"/walk/mangala-walk"},"reason":"Maṅgalavāra (Tuesday) — 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":"thane"},"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, 1983 CE · Thane, Maharashtra · Vidhyamitra","description":"December 13, 1983 CE for Thane, Maharashtra: Śukla Navamī, sūryodaya 07:03, sūryāsta 18:03.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/thane/1983-12-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/thane/1983-12-13","sa":"https://sa.vidhyamitra.com/city/thane/1983-12-13","hi":"https://hi.vidhyamitra.com/city/thane/1983-12-13","x-default":"https://vidhyamitra.com/city/thane/1983-12-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T11:00:34.027Z","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":"2026-06-01T11:00:34.027Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T11:00:34.027Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}