{"id":"vidhyamitra:city-day:ayodhya:2173-12-20:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/ayodhya/2173-12-20","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2173-12-20","date_display":"December 20, 2173 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":2173,"month":12,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2515085.770833,"kali_year":5275,"ahargana":1926620.2708,"sun":{"sidereal_longitude":241.4166,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":72.4688,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":16,"name":"Pratipada","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Pratipada","elongation_degrees":191.0522,"elapsed_within_tithi_degrees":11.0522},"nakshatra":{"number":6,"name":"Ārdrā","pada":2,"moon_longitude":72.4688,"elapsed_within_degrees":5.8021},"yoga":{"number":24,"name":"Śukla","sum_longitude":313.8855},"karana":{"half_tithi_index":31,"name":"Kaulava"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"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":2173,"month":12,"day":20,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2515085.770833,"ahargana":1926620.2708,"kali_year":5275,"ayanamsa_lahiri":26.2832,"grahas":{"sun":{"sidereal_longitude":242.191286,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"moon":{"sidereal_longitude":71.03238599999997,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":2},"retrograde":false,"latitude":4.4886},"mars":{"sidereal_longitude":175.98388599999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":258.11258599999996,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":242.01248600000008,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"venus":{"sidereal_longitude":205.94238599999994,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":339.194186,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":338.3865,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":158.3865,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","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":2173,"month":12,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2515085.770833,"kali_year":5275,"ahargana":1926620.2708,"sun":{"sidereal_longitude":241.4166,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":72.4688,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":16,"name":"Pratipada","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Pratipada","elongation_degrees":191.0522,"elapsed_within_tithi_degrees":11.0522},"nakshatra":{"number":6,"name":"Ārdrā","pada":2,"moon_longitude":72.4688,"elapsed_within_degrees":5.8021},"yoga":{"number":24,"name":"Śukla","sum_longitude":313.8855},"karana":{"half_tithi_index":31,"name":"Kaulava"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.489,"elongation":168.948},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.489,"opposition_distance":11.052}},"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":"06:46","sunsetLocal":"17:13","solarNoonLocal":"11:59","dayLengthHours":10.452991812418782,"dayLengthDisplay":"10 Hours 27 Mins 11 Secs","nightLengthDisplay":"13 Hours 32 Mins 49 Secs","moonriseLocal":"17:42","moonsetLocal":"07:28","rahuKala":{"name":"Rāhu Kāla","start":"08:04","end":"09:23","startHours":8.068996111635146,"endHours":9.375620088187492,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:41","end":"11:59","startHours":10.682244064739841,"endHours":11.98886804129219,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:18","end":"14:36","startHours":13.295492017844536,"endHours":14.602115994396884,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:12","end":"09:33","startHours":9.201403557980512,"endHours":9.549836618394473,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:12","end":"07:29","startHours":7.197913460600247,"endHours":7.476659908931414,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:38","end":"12:20","startHours":11.64043498087823,"endHours":12.33730110170615,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:22","end":"06:04","startHours":5.36863989342696,"endHours":6.065506014254879,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:53","end":"06:46","startHours":5.891289484047899,"endHours":6.762372135082797,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:44","end":"14:26","startHours":13.731033343361986,"endHours":14.427899464189904,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:01","end":"17:25","startHours":17.01536394750158,"endHours":17.41536394750158,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:13","end":"17:39","startHours":17.21536394750158,"endHours":17.650905273019028,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"16:58","end":"18:43","startHours":16.96536394750158,"endHours":18.71536394750158,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:38","end":"00:20","startHours":23.64043498087823,"endHours":24.33730110170615,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"06:46","end":"08:04","startHours":6.762372135082797,"endHours":8.068996111635146,"quality":"auspicious"},{"name":"Kāla","start":"08:04","end":"09:23","startHours":8.068996111635146,"endHours":9.375620088187492,"quality":"inauspicious"},{"name":"Śubha","start":"09:23","end":"10:41","startHours":9.375620088187492,"endHours":10.682244064739841,"quality":"auspicious"},{"name":"Roga","start":"10:41","end":"11:59","startHours":10.682244064739841,"endHours":11.98886804129219,"quality":"inauspicious"},{"name":"Udveg","start":"11:59","end":"13:18","startHours":11.98886804129219,"endHours":13.295492017844536,"quality":"inauspicious"},{"name":"Chala","start":"13:18","end":"14:36","startHours":13.295492017844536,"endHours":14.602115994396884,"quality":"neutral"},{"name":"Labha","start":"14:36","end":"15:55","startHours":14.602115994396884,"endHours":15.908739970949231,"quality":"auspicious"},{"name":"Amṛta","start":"15:55","end":"17:13","startHours":15.908739970949231,"endHours":17.21536394750158,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"17:13","end":"18:55","startHours":17.21536394750158,"endHours":18.90873997094923,"quality":"neutral"},{"name":"Labha","start":"18:55","end":"20:36","startHours":18.90873997094923,"endHours":20.602115994396883,"quality":"auspicious"},{"name":"Amṛta","start":"20:36","end":"22:18","startHours":20.602115994396883,"endHours":22.295492017844538,"quality":"auspicious"},{"name":"Kāla","start":"22:18","end":"23:59","startHours":22.295492017844538,"endHours":23.98886804129219,"quality":"inauspicious"},{"name":"Śubha","start":"23:59","end":"01:41","startHours":23.98886804129219,"endHours":25.68224406473984,"quality":"auspicious"},{"name":"Roga","start":"01:41","end":"03:23","startHours":25.68224406473984,"endHours":27.375620088187492,"quality":"inauspicious"},{"name":"Udveg","start":"03:23","end":"05:04","startHours":27.375620088187492,"endHours":29.068996111635144,"quality":"inauspicious"},{"name":"Chala","start":"05:04","end":"06:46","startHours":29.068996111635144,"endHours":30.7623721350828,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"06:46","end":"07:46","startHours":6.762372135082797,"endHours":7.762372135082797,"planetary_lord":"Moon"},{"name":"Hora 2","start":"07:46","end":"08:46","startHours":7.762372135082797,"endHours":8.762372135082797,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"08:46","end":"09:46","startHours":8.762372135082797,"endHours":9.762372135082797,"planetary_lord":"Venus"},{"name":"Hora 4","start":"09:46","end":"10:46","startHours":9.762372135082797,"endHours":10.762372135082797,"planetary_lord":"Sun"},{"name":"Hora 5","start":"10:46","end":"11:46","startHours":10.762372135082797,"endHours":11.762372135082797,"planetary_lord":"Mars"},{"name":"Hora 6","start":"11:46","end":"12:46","startHours":11.762372135082797,"endHours":12.762372135082797,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"12:46","end":"13:46","startHours":12.762372135082797,"endHours":13.762372135082797,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"13:46","end":"14:46","startHours":13.762372135082797,"endHours":14.762372135082797,"planetary_lord":"Moon"},{"name":"Hora 9","start":"14:46","end":"15:46","startHours":14.762372135082797,"endHours":15.762372135082797,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"15:46","end":"16:46","startHours":15.762372135082797,"endHours":16.7623721350828,"planetary_lord":"Venus"},{"name":"Hora 11","start":"16:46","end":"17:46","startHours":16.7623721350828,"endHours":17.7623721350828,"planetary_lord":"Sun"},{"name":"Hora 12","start":"17:46","end":"18:46","startHours":17.7623721350828,"endHours":18.7623721350828,"planetary_lord":"Mars"},{"name":"Hora 13","start":"18:46","end":"19:46","startHours":18.7623721350828,"endHours":19.7623721350828,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"19:46","end":"20:46","startHours":19.7623721350828,"endHours":20.7623721350828,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"20:46","end":"21:46","startHours":20.7623721350828,"endHours":21.7623721350828,"planetary_lord":"Moon"},{"name":"Hora 16","start":"21:46","end":"22:46","startHours":21.7623721350828,"endHours":22.7623721350828,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"22:46","end":"23:46","startHours":22.7623721350828,"endHours":23.7623721350828,"planetary_lord":"Venus"},{"name":"Hora 18","start":"23:46","end":"00:46","startHours":23.7623721350828,"endHours":24.7623721350828,"planetary_lord":"Sun"},{"name":"Hora 19","start":"00:46","end":"01:46","startHours":24.7623721350828,"endHours":25.7623721350828,"planetary_lord":"Mars"},{"name":"Hora 20","start":"01:46","end":"02:46","startHours":25.7623721350828,"endHours":26.7623721350828,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"02:46","end":"03:46","startHours":26.7623721350828,"endHours":27.7623721350828,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"03:46","end":"04:46","startHours":27.7623721350828,"endHours":28.7623721350828,"planetary_lord":"Moon"},{"name":"Hora 23","start":"04:46","end":"05:46","startHours":28.7623721350828,"endHours":29.7623721350828,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"05:46","end":"06:46","startHours":29.7623721350828,"endHours":30.7623721350828,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Punarvasu","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Uttara Phalgunī","Hasta","Citrā","Svātī","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Mithuna","Siṃha","Vṛścika","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Karka","Kanyā","Tulā","Makara","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"South","rahuVasa":"North-East","anandadiYoga":{"name":"Mudgara","quality":"Inauspicious"},"drikRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-23.427697137173254,"eotMinutes":1.851917522468745,"ayanamsa":26.2832}},"calendars":{"vikram_samvat":2230,"vikram_samvatsara":"Vyaya","saka_samvat":2095,"saka_samvatsara":"Śrīmukha","bengali_samvat":1580,"malayalam_era":1349,"nanakshahi_year":704,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Kṛṣṇa Pakṣa","solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Kṛṣṇa Pratipada · Vikram 2230 Vyaya · Śaka 2095 Śrīmukha"},"festivals":[{"id":"lohri","name":"Lohri","name_sanskrit":"लोहड़ी","tradition":"Regional","significance":"Punjab harvest festival; eve of Makara Saṅkrānti. (Approximated as 13/14 January annually; correct via Sun in Dhanu/Makara cusp.)","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":4},{"id":"dhanu-sankranti","name":"Dhanu Saṅkrānti","name_sanskrit":"धनु सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Sagittarius; Dhanu-māsa (Khara-māsa).","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":5}],"todays_walk":{"walk":{"id":"chandra-walk","name":"Candra Walk","name_sanskrit":"चन्द्र यात्रा","type":"graha","description":"Manas-control + BG 6.5-7.","step_count":5,"url":"/walk/chandra-walk"},"reason":"Somavāra (Monday) — 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 20, 2173 CE · Ayodhyā · Vidhyamitra","description":"December 20, 2173 CE for Ayodhyā: Kṛṣṇa Pratipada, sūryodaya 06:46, sūryāsta 17:13.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/ayodhya/2173-12-20","hreflang_alternates":{"en":"https://vidhyamitra.com/city/ayodhya/2173-12-20","sa":"https://sa.vidhyamitra.com/city/ayodhya/2173-12-20","hi":"https://hi.vidhyamitra.com/city/ayodhya/2173-12-20","x-default":"https://vidhyamitra.com/city/ayodhya/2173-12-20"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-24T09:48:56.874Z","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":"2026-05-24T09:48:56.874Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-24T09:48:56.874Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}