{"id":"vidhyamitra:city-day:ayodhya:1986-12-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/ayodhya/1986-12-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1986-12-13","date_display":"December 13, 1986 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":1986,"month":12,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2446777.770833,"kali_year":5088,"ahargana":1858312.2708,"sun":{"sidereal_longitude":236.6843,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":19.8511,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":143.1667,"elapsed_within_tithi_degrees":11.1667},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2,"moon_longitude":19.8511,"elapsed_within_degrees":6.5177},"yoga":{"number":20,"name":"Śiva","sum_longitude":256.5354},"karana":{"half_tithi_index":23,"name":"Bālava"},"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":1986,"month":12,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2446777.770833,"ahargana":1858312.2708,"kali_year":5088,"ayanamsa_lahiri":23.6707,"grahas":{"sun":{"sidereal_longitude":237.05715400000008,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":21.409954000000027,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3},"retrograde":false,"latitude":1.6972},"mars":{"sidereal_longitude":318.04005400000005,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":220.75825399999997,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":322.05555400000003,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":196.48105399999997,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":229.16415400000005,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":357.6731,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":177.6731,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","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":1986,"month":12,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2446777.770833,"kali_year":5088,"ahargana":1858312.2708,"sun":{"sidereal_longitude":236.6843,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":19.8511,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":143.1667,"elapsed_within_tithi_degrees":11.1667},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2,"moon_longitude":19.8511,"elapsed_within_degrees":6.5177},"yoga":{"number":20,"name":"Śiva","sum_longitude":256.5354},"karana":{"half_tithi_index":23,"name":"Bālava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.697,"elongation":143.167},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.697,"opposition_distance":36.833}},"eclipse_window_40days":[]},"city":{"slug":"ayodhya","name":"Ayodhyā","lat":26.799,"lon":82.204,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"ayodhya","name":"Ayodhyā","lat":26.799,"lon":82.204,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"sunriseLocal":"06:42","sunsetLocal":"17:10","solarNoonLocal":"11:56","dayLengthHours":10.478345109153501,"dayLengthDisplay":"10 Hours 28 Mins 42 Secs","nightLengthDisplay":"13 Hours 31 Mins 18 Secs","moonriseLocal":"14:57","moonsetLocal":"04:10","rahuKala":{"name":"Rāhu Kāla","start":"09:19","end":"10:38","startHours":9.315302885221321,"endHours":10.62509602386551,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:15","end":"14:33","startHours":13.244682301153885,"endHours":14.554475439798072,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:42","end":"08:00","startHours":6.695716607932947,"endHours":8.005509746577134,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:08","end":"09:29","startHours":9.140663800068763,"endHours":9.48994197037388,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:08","end":"07:25","startHours":7.132314320814342,"endHours":7.411736857058435,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:35","end":"12:17","startHours":11.58561099220458,"endHours":12.284167332814816,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:18","end":"06:00","startHours":5.29860392671248,"endHours":5.997160267322713,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:49","end":"06:42","startHours":5.822521182170155,"endHours":6.695716607932947,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:41","end":"14:23","startHours":13.68128001403528,"endHours":14.379836354645514,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"16:58","end":"17:22","startHours":16.97406171708645,"endHours":17.374061717086448,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:10","end":"17:37","startHours":17.17406171708645,"endHours":17.610659429967846,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"16:55","end":"18:40","startHours":16.92406171708645,"endHours":18.67406171708645,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:35","end":"00:17","startHours":23.585610992204582,"endHours":24.284167332814814,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"06:42","end":"08:00","startHours":6.695716607932947,"endHours":8.005509746577134,"quality":"inauspicious"},{"name":"Śubha","start":"08:00","end":"09:19","startHours":8.005509746577134,"endHours":9.315302885221321,"quality":"auspicious"},{"name":"Roga","start":"09:19","end":"10:38","startHours":9.315302885221321,"endHours":10.62509602386551,"quality":"inauspicious"},{"name":"Udveg","start":"10:38","end":"11:56","startHours":10.62509602386551,"endHours":11.934889162509698,"quality":"inauspicious"},{"name":"Chala","start":"11:56","end":"13:15","startHours":11.934889162509698,"endHours":13.244682301153885,"quality":"neutral"},{"name":"Labha","start":"13:15","end":"14:33","startHours":13.244682301153885,"endHours":14.554475439798072,"quality":"auspicious"},{"name":"Amṛta","start":"14:33","end":"15:52","startHours":14.554475439798072,"endHours":15.86426857844226,"quality":"auspicious"},{"name":"Kāla","start":"15:52","end":"17:10","startHours":15.86426857844226,"endHours":17.17406171708645,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"17:10","end":"18:52","startHours":17.17406171708645,"endHours":18.86426857844226,"quality":"auspicious"},{"name":"Amṛta","start":"18:52","end":"20:33","startHours":18.86426857844226,"endHours":20.554475439798075,"quality":"auspicious"},{"name":"Kāla","start":"20:33","end":"22:15","startHours":20.554475439798075,"endHours":22.244682301153887,"quality":"inauspicious"},{"name":"Śubha","start":"22:15","end":"23:56","startHours":22.244682301153887,"endHours":23.9348891625097,"quality":"auspicious"},{"name":"Roga","start":"23:56","end":"01:38","startHours":23.9348891625097,"endHours":25.62509602386551,"quality":"inauspicious"},{"name":"Udveg","start":"01:38","end":"03:19","startHours":25.62509602386551,"endHours":27.31530288522132,"quality":"inauspicious"},{"name":"Chala","start":"03:19","end":"05:00","startHours":27.31530288522132,"endHours":29.005509746577136,"quality":"neutral"},{"name":"Labha","start":"05:00","end":"06:42","startHours":29.005509746577136,"endHours":30.695716607932948,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:42","end":"07:42","startHours":6.695716607932947,"endHours":7.695716607932947,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"07:42","end":"08:42","startHours":7.695716607932947,"endHours":8.695716607932948,"planetary_lord":"Moon"},{"name":"Hora 3","start":"08:42","end":"09:42","startHours":8.695716607932948,"endHours":9.695716607932948,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"09:42","end":"10:42","startHours":9.695716607932948,"endHours":10.695716607932948,"planetary_lord":"Venus"},{"name":"Hora 5","start":"10:42","end":"11:42","startHours":10.695716607932948,"endHours":11.695716607932948,"planetary_lord":"Sun"},{"name":"Hora 6","start":"11:42","end":"12:42","startHours":11.695716607932948,"endHours":12.695716607932948,"planetary_lord":"Mars"},{"name":"Hora 7","start":"12:42","end":"13:42","startHours":12.695716607932948,"endHours":13.695716607932948,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"13:42","end":"14:42","startHours":13.695716607932948,"endHours":14.695716607932948,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"14:42","end":"15:42","startHours":14.695716607932948,"endHours":15.695716607932948,"planetary_lord":"Moon"},{"name":"Hora 10","start":"15:42","end":"16:42","startHours":15.695716607932948,"endHours":16.695716607932948,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"16:42","end":"17:42","startHours":16.695716607932948,"endHours":17.695716607932948,"planetary_lord":"Venus"},{"name":"Hora 12","start":"17:42","end":"18:42","startHours":17.695716607932948,"endHours":18.695716607932948,"planetary_lord":"Sun"},{"name":"Hora 13","start":"18:42","end":"19:42","startHours":18.695716607932948,"endHours":19.695716607932948,"planetary_lord":"Mars"},{"name":"Hora 14","start":"19:42","end":"20:42","startHours":19.695716607932948,"endHours":20.695716607932948,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"20:42","end":"21:42","startHours":20.695716607932948,"endHours":21.695716607932948,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"21:42","end":"22:42","startHours":21.695716607932948,"endHours":22.695716607932948,"planetary_lord":"Moon"},{"name":"Hora 17","start":"22:42","end":"23:42","startHours":22.695716607932948,"endHours":23.695716607932948,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"23:42","end":"00:42","startHours":23.695716607932948,"endHours":24.695716607932948,"planetary_lord":"Venus"},{"name":"Hora 19","start":"00:42","end":"01:42","startHours":24.695716607932948,"endHours":25.695716607932948,"planetary_lord":"Sun"},{"name":"Hora 20","start":"01:42","end":"02:42","startHours":25.695716607932948,"endHours":26.695716607932948,"planetary_lord":"Mars"},{"name":"Hora 21","start":"02:42","end":"03:42","startHours":26.695716607932948,"endHours":27.695716607932948,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"03:42","end":"04:42","startHours":27.695716607932948,"endHours":28.695716607932948,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"04:42","end":"05:42","startHours":28.695716607932948,"endHours":29.695716607932948,"planetary_lord":"Moon"},{"name":"Hora 24","start":"05:42","end":"06:42","startHours":29.695716607932948,"endHours":30.695716607932948,"planetary_lord":"Mercury"}],"taraBala":{"favorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Uttara Phalgunī","Hasta","Citrā","Svātī","Viśākhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","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":"East (Pūrva)","chandraVasa":"East","rahuVasa":"East","anandadiYoga":{"name":"Cara","quality":"Auspicious"},"drikRitu":"Hemanta (Pre-winter) (Drik)","vedicRitu":"Śarad (Autumn)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-23.11237368153826,"eotMinutes":5.090650249418121,"ayanamsa":23.6707}},"calendars":{"vikram_samvat":2043,"vikram_samvatsara":"Pramāthi","saka_samvat":1908,"saka_samvatsara":"Akṣaya","bengali_samvat":1393,"malayalam_era":1162,"nanakshahi_year":517,"lunar_month":"Mārgaśīrṣa","lunar_month_paksha_full":"Mārgaśīrṣa Śukla Pakṣa","solar_month":"Vṛścika (Kārttikai)","ritu":"Hemanta (Pre-winter)","display_summary":"Mārgaśīrṣa Śukla Dvādaśī · Vikram 2043 Pramāthi · Śaka 1908 Akṣaya"},"festivals":[{"id":"vrischika-sankranti","name":"Vṛścika Saṅkrānti","name_sanskrit":"वृश्चिक सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Scorpio.","vrata":false,"detection":{"sun_rashi":"Vṛścika"},"precedence":5}],"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":[]},"validity":{"eternal":false,"location_specific":"ayodhya"},"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, 1986 CE · Ayodhyā · Vidhyamitra","description":"December 13, 1986 CE for Ayodhyā: Śukla Dvādaśī, sūryodaya 06:42, sūryāsta 17:10.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/ayodhya/1986-12-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/ayodhya/1986-12-13","sa":"https://sa.vidhyamitra.com/city/ayodhya/1986-12-13","hi":"https://hi.vidhyamitra.com/city/ayodhya/1986-12-13","x-default":"https://vidhyamitra.com/city/ayodhya/1986-12-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-21T17:18:38.308Z","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":"2026-05-21T17:18:38.308Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-21T17:18:38.308Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}