{"id":"vidhyamitra:city-day:ayodhya:2131-12-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/ayodhya/2131-12-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2131-12-13","date_display":"December 13, 2131 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":2131,"month":12,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2499737.770833,"kali_year":5233,"ahargana":1911272.2708,"sun":{"sidereal_longitude":234.1016,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":159.0703,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":24,"name":"Navamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Navamī","elongation_degrees":284.9687,"elapsed_within_tithi_degrees":8.9687},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4,"moon_longitude":159.0703,"elapsed_within_degrees":12.4036},"yoga":{"number":3,"name":"Āyuṣmān","sum_longitude":33.1719},"karana":{"half_tithi_index":47,"name":"Gara"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"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":2131,"month":12,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2499737.770833,"ahargana":1911272.2708,"kali_year":5233,"ayanamsa_lahiri":25.6962,"grahas":{"sun":{"sidereal_longitude":234.8393920000001,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":162.383192,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":false,"latitude":4.4956},"mars":{"sidereal_longitude":5.946792000000016,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":218.98339199999998,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":59.19719199999997,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":2},"retrograde":true},"venus":{"sidereal_longitude":270.60309200000006,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":205.21459200000004,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":71.5974,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":251.5974,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":4},"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":2131,"month":12,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2499737.770833,"kali_year":5233,"ahargana":1911272.2708,"sun":{"sidereal_longitude":234.1016,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":159.0703,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":24,"name":"Navamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Navamī","elongation_degrees":284.9687,"elapsed_within_tithi_degrees":8.9687},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4,"moon_longitude":159.0703,"elapsed_within_degrees":12.4036},"yoga":{"number":3,"name":"Āyuṣmān","sum_longitude":33.1719},"karana":{"half_tithi_index":47,"name":"Gara"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.496,"elongation":75.031},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.496,"opposition_distance":104.969}},"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":10.479430266590155,"dayLengthDisplay":"10 Hours 28 Mins 46 Secs","nightLengthDisplay":"13 Hours 31 Mins 14 Secs","moonriseLocal":"01:10","moonsetLocal":"13:02","rahuKala":{"name":"Rāhu Kāla","start":"13:15","end":"14:33","startHours":13.244817945833468,"endHours":14.554746729157237,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"06:42","end":"08:00","startHours":6.695174029214622,"endHours":8.005102812538391,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"09:19","end":"10:37","startHours":9.31503159586216,"endHours":10.624960379185929,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:08","end":"09:29","startHours":9.140374424752324,"endHours":9.489688766971996,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:08","end":"07:25","startHours":7.131816956989211,"endHours":7.411268430764949,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:35","end":"12:17","startHours":11.585574820290027,"endHours":12.28420350472937,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:18","end":"06:00","startHours":5.297916660335934,"endHours":5.996545344775278,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:49","end":"06:42","startHours":5.821888173665442,"endHours":6.695174029214622,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:41","end":"14:23","startHours":13.681460873608058,"endHours":14.380089558047402,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"16:58","end":"17:22","startHours":16.974604295804777,"endHours":17.374604295804776,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:10","end":"17:37","startHours":17.174604295804777,"endHours":17.611247223579365,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"16:55","end":"18:40","startHours":16.924604295804777,"endHours":18.674604295804777,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:35","end":"00:17","startHours":23.585574820290027,"endHours":24.28420350472937,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"06:42","end":"08:00","startHours":6.695174029214622,"endHours":8.005102812538391,"quality":"auspicious"},{"name":"Roga","start":"08:00","end":"09:19","startHours":8.005102812538391,"endHours":9.31503159586216,"quality":"inauspicious"},{"name":"Udveg","start":"09:19","end":"10:37","startHours":9.31503159586216,"endHours":10.624960379185929,"quality":"inauspicious"},{"name":"Chala","start":"10:37","end":"11:56","startHours":10.624960379185929,"endHours":11.934889162509698,"quality":"neutral"},{"name":"Labha","start":"11:56","end":"13:15","startHours":11.934889162509698,"endHours":13.244817945833468,"quality":"auspicious"},{"name":"Amṛta","start":"13:15","end":"14:33","startHours":13.244817945833468,"endHours":14.554746729157237,"quality":"auspicious"},{"name":"Kāla","start":"14:33","end":"15:52","startHours":14.554746729157237,"endHours":15.864675512481007,"quality":"inauspicious"},{"name":"Śubha","start":"15:52","end":"17:10","startHours":15.864675512481007,"endHours":17.174604295804777,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"17:10","end":"18:52","startHours":17.174604295804777,"endHours":18.864675512481007,"quality":"auspicious"},{"name":"Kāla","start":"18:52","end":"20:33","startHours":18.864675512481007,"endHours":20.554746729157237,"quality":"inauspicious"},{"name":"Śubha","start":"20:33","end":"22:15","startHours":20.554746729157237,"endHours":22.244817945833468,"quality":"auspicious"},{"name":"Roga","start":"22:15","end":"23:56","startHours":22.244817945833468,"endHours":23.9348891625097,"quality":"inauspicious"},{"name":"Udveg","start":"23:56","end":"01:37","startHours":23.9348891625097,"endHours":25.62496037918593,"quality":"inauspicious"},{"name":"Chala","start":"01:37","end":"03:19","startHours":25.62496037918593,"endHours":27.31503159586216,"quality":"neutral"},{"name":"Labha","start":"03:19","end":"05:00","startHours":27.31503159586216,"endHours":29.00510281253839,"quality":"auspicious"},{"name":"Amṛta","start":"05:00","end":"06:42","startHours":29.00510281253839,"endHours":30.69517402921462,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:42","end":"07:42","startHours":6.695174029214622,"endHours":7.695174029214622,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"07:42","end":"08:42","startHours":7.695174029214622,"endHours":8.695174029214622,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"08:42","end":"09:42","startHours":8.695174029214622,"endHours":9.695174029214622,"planetary_lord":"Moon"},{"name":"Hora 4","start":"09:42","end":"10:42","startHours":9.695174029214622,"endHours":10.695174029214622,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"10:42","end":"11:42","startHours":10.695174029214622,"endHours":11.695174029214622,"planetary_lord":"Venus"},{"name":"Hora 6","start":"11:42","end":"12:42","startHours":11.695174029214622,"endHours":12.695174029214622,"planetary_lord":"Sun"},{"name":"Hora 7","start":"12:42","end":"13:42","startHours":12.695174029214622,"endHours":13.695174029214622,"planetary_lord":"Mars"},{"name":"Hora 8","start":"13:42","end":"14:42","startHours":13.695174029214622,"endHours":14.695174029214622,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"14:42","end":"15:42","startHours":14.695174029214622,"endHours":15.695174029214622,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"15:42","end":"16:42","startHours":15.695174029214622,"endHours":16.69517402921462,"planetary_lord":"Moon"},{"name":"Hora 11","start":"16:42","end":"17:42","startHours":16.69517402921462,"endHours":17.69517402921462,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"17:42","end":"18:42","startHours":17.69517402921462,"endHours":18.69517402921462,"planetary_lord":"Venus"},{"name":"Hora 13","start":"18:42","end":"19:42","startHours":18.69517402921462,"endHours":19.69517402921462,"planetary_lord":"Sun"},{"name":"Hora 14","start":"19:42","end":"20:42","startHours":19.69517402921462,"endHours":20.69517402921462,"planetary_lord":"Mars"},{"name":"Hora 15","start":"20:42","end":"21:42","startHours":20.69517402921462,"endHours":21.69517402921462,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"21:42","end":"22:42","startHours":21.69517402921462,"endHours":22.69517402921462,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"22:42","end":"23:42","startHours":22.69517402921462,"endHours":23.69517402921462,"planetary_lord":"Moon"},{"name":"Hora 18","start":"23:42","end":"00:42","startHours":23.69517402921462,"endHours":24.69517402921462,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"00:42","end":"01:42","startHours":24.69517402921462,"endHours":25.69517402921462,"planetary_lord":"Venus"},{"name":"Hora 20","start":"01:42","end":"02:42","startHours":25.69517402921462,"endHours":26.69517402921462,"planetary_lord":"Sun"},{"name":"Hora 21","start":"02:42","end":"03:42","startHours":26.69517402921462,"endHours":27.69517402921462,"planetary_lord":"Mars"},{"name":"Hora 22","start":"03:42","end":"04:42","startHours":27.69517402921462,"endHours":28.69517402921462,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"04:42","end":"05:42","startHours":28.69517402921462,"endHours":29.69517402921462,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"05:42","end":"06:42","startHours":29.69517402921462,"endHours":30.69517402921462,"planetary_lord":"Moon"}],"taraBala":{"favorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Hasta","Citrā","Svātī","Viśākhā","Anurādhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Mithuna","Karka","Kanyā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Tulā","Dhanu","Makara"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"North-West","rahuVasa":"North-West","anandadiYoga":{"name":"Dhātṛ","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":-23.098840524776236,"eotMinutes":5.090650249418121,"ayanamsa":25.6962}},"calendars":{"vikram_samvat":2188,"vikram_samvatsara":"Krodhi","saka_samvat":2053,"saka_samvatsara":"Khara","bengali_samvat":1538,"malayalam_era":1307,"nanakshahi_year":662,"lunar_month":"Mārgaśīrṣa","lunar_month_paksha_full":"Mārgaśīrṣa Kṛṣṇa Pakṣa","solar_month":"Vṛścika (Kārttikai)","ritu":"Hemanta (Pre-winter)","display_summary":"Mārgaśīrṣa Kṛṣṇa Navamī · Vikram 2188 Krodhi · Śaka 2053 Khara"},"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":"guru-walk","name":"Bṛhaspati Walk","name_sanskrit":"गुरु यात्रा","type":"graha","description":"Wisdom transmission + BG 4.34.","step_count":8,"url":"/walk/guru-walk"},"reason":"Guruvāra (Thursday) — 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, 2131 CE · Ayodhyā · Vidhyamitra","description":"December 13, 2131 CE for Ayodhyā: Kṛṣṇa Navamī, sūryodaya 06:42, sūryāsta 17:10.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/ayodhya/2131-12-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/ayodhya/2131-12-13","sa":"https://sa.vidhyamitra.com/city/ayodhya/2131-12-13","hi":"https://hi.vidhyamitra.com/city/ayodhya/2131-12-13","x-default":"https://vidhyamitra.com/city/ayodhya/2131-12-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-17T09:26:40.848Z","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":"2026-05-17T09:26:40.848Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-17T09:26:40.848Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}