{"id":"vidhyamitra:city-day:ayodhya:2009-12-20:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/ayodhya/2009-12-20","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2009-12-20","date_display":"December 20, 2009 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":2009,"month":12,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2455185.770833,"kali_year":5111,"ahargana":1866720.2708,"sun":{"sidereal_longitude":243.9179,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":286.1156,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":42.1977,"elapsed_within_tithi_degrees":6.1977},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2,"moon_longitude":286.1156,"elapsed_within_degrees":6.1156},"yoga":{"number":13,"name":"Vyāghāta","sum_longitude":170.0335},"karana":{"half_tithi_index":7,"name":"Viṣṭi"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"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":2009,"month":12,"day":20,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2455185.770833,"ahargana":1866720.2708,"kali_year":5111,"ayanamsa_lahiri":23.9922,"grahas":{"sun":{"sidereal_longitude":244.28360599999996,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":false},"moon":{"sidereal_longitude":283.04090599999995,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":false,"latitude":1.0829},"mars":{"sidereal_longitude":115.55410600000005,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":264.4460059999999,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":300.32570599999997,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false},"venus":{"sidereal_longitude":238.680206,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":159.879906,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":272.1768,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":92.1768,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":7,"name":"Punarvasu","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":2009,"month":12,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2455185.770833,"kali_year":5111,"ahargana":1866720.2708,"sun":{"sidereal_longitude":243.9179,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":286.1156,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":42.1977,"elapsed_within_tithi_degrees":6.1977},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2,"moon_longitude":286.1156,"elapsed_within_degrees":6.1156},"yoga":{"number":13,"name":"Vyāghāta","sum_longitude":170.0335},"karana":{"half_tithi_index":7,"name":"Viṣṭi"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.083,"elongation":42.198},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.083,"opposition_distance":137.802}},"eclipse_window_40days":[{"offset_days":12,"type":"lunar","occurs":true,"moon_latitude":1.039,"opposition_distance":1.922}]},"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":10.453188668773798,"dayLengthDisplay":"10 Hours 27 Mins 11 Secs","nightLengthDisplay":"13 Hours 32 Mins 49 Secs","moonriseLocal":"09:11","moonsetLocal":"19:58","rahuKala":{"name":"Rāhu Kāla","start":"15:55","end":"17:13","startHours":15.908813792082363,"endHours":17.21546237567909,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"11:59","end":"13:18","startHours":11.98886804129219,"endHours":13.295516624888913,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:36","end":"15:55","startHours":14.602165208485637,"endHours":15.908813792082363,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:12","end":"09:33","startHours":9.201351062952508,"endHours":9.549790685244968,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:12","end":"07:29","startHours":7.197823234770865,"endHours":7.476574932604833,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:38","end":"12:20","startHours":11.64042841899973,"endHours":12.33730766358465,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:22","end":"06:04","startHours":5.36851521773545,"endHours":6.06539446232037,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:53","end":"06:46","startHours":5.89117465117414,"endHours":6.762273706905289,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:44","end":"14:26","startHours":13.731066152754488,"endHours":14.427945397339409,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:01","end":"17:25","startHours":17.01546237567909,"endHours":17.415462375679088,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:13","end":"17:39","startHours":17.21546237567909,"endHours":17.651011903544664,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"16:58","end":"18:43","startHours":16.96546237567909,"endHours":18.71546237567909,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:38","end":"00:20","startHours":23.64042841899973,"endHours":24.33730766358465,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:46","end":"08:04","startHours":6.762273706905289,"endHours":8.068922290502014,"quality":"inauspicious"},{"name":"Chala","start":"08:04","end":"09:23","startHours":8.068922290502014,"endHours":9.375570874098738,"quality":"neutral"},{"name":"Labha","start":"09:23","end":"10:41","startHours":9.375570874098738,"endHours":10.682219457695464,"quality":"auspicious"},{"name":"Amṛta","start":"10:41","end":"11:59","startHours":10.682219457695464,"endHours":11.98886804129219,"quality":"auspicious"},{"name":"Kāla","start":"11:59","end":"13:18","startHours":11.98886804129219,"endHours":13.295516624888913,"quality":"inauspicious"},{"name":"Śubha","start":"13:18","end":"14:36","startHours":13.295516624888913,"endHours":14.602165208485637,"quality":"auspicious"},{"name":"Roga","start":"14:36","end":"15:55","startHours":14.602165208485637,"endHours":15.908813792082363,"quality":"inauspicious"},{"name":"Udveg","start":"15:55","end":"17:13","startHours":15.908813792082363,"endHours":17.21546237567909,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"17:13","end":"18:55","startHours":17.21546237567909,"endHours":18.908813792082363,"quality":"auspicious"},{"name":"Roga","start":"18:55","end":"20:36","startHours":18.908813792082363,"endHours":20.602165208485637,"quality":"inauspicious"},{"name":"Udveg","start":"20:36","end":"22:18","startHours":20.602165208485637,"endHours":22.295516624888915,"quality":"inauspicious"},{"name":"Chala","start":"22:18","end":"23:59","startHours":22.295516624888915,"endHours":23.98886804129219,"quality":"neutral"},{"name":"Labha","start":"23:59","end":"01:41","startHours":23.98886804129219,"endHours":25.682219457695464,"quality":"auspicious"},{"name":"Amṛta","start":"01:41","end":"03:23","startHours":25.682219457695464,"endHours":27.37557087409874,"quality":"auspicious"},{"name":"Kāla","start":"03:23","end":"05:04","startHours":27.37557087409874,"endHours":29.068922290502016,"quality":"inauspicious"},{"name":"Śubha","start":"05:04","end":"06:46","startHours":29.068922290502016,"endHours":30.76227370690529,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:46","end":"07:46","startHours":6.762273706905289,"endHours":7.762273706905289,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:46","end":"08:46","startHours":7.762273706905289,"endHours":8.76227370690529,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:46","end":"09:46","startHours":8.76227370690529,"endHours":9.76227370690529,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:46","end":"10:46","startHours":9.76227370690529,"endHours":10.76227370690529,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:46","end":"11:46","startHours":10.76227370690529,"endHours":11.76227370690529,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:46","end":"12:46","startHours":11.76227370690529,"endHours":12.76227370690529,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:46","end":"13:46","startHours":12.76227370690529,"endHours":13.76227370690529,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:46","end":"14:46","startHours":13.76227370690529,"endHours":14.76227370690529,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:46","end":"15:46","startHours":14.76227370690529,"endHours":15.76227370690529,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:46","end":"16:46","startHours":15.76227370690529,"endHours":16.76227370690529,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:46","end":"17:46","startHours":16.76227370690529,"endHours":17.76227370690529,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:46","end":"18:46","startHours":17.76227370690529,"endHours":18.76227370690529,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:46","end":"19:46","startHours":18.76227370690529,"endHours":19.76227370690529,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:46","end":"20:46","startHours":19.76227370690529,"endHours":20.76227370690529,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:46","end":"21:46","startHours":20.76227370690529,"endHours":21.76227370690529,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:46","end":"22:46","startHours":21.76227370690529,"endHours":22.76227370690529,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:46","end":"23:46","startHours":22.76227370690529,"endHours":23.76227370690529,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:46","end":"00:46","startHours":23.76227370690529,"endHours":24.76227370690529,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:46","end":"01:46","startHours":24.76227370690529,"endHours":25.76227370690529,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:46","end":"02:46","startHours":25.76227370690529,"endHours":26.76227370690529,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:46","end":"03:46","startHours":26.76227370690529,"endHours":27.76227370690529,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:46","end":"04:46","startHours":27.76227370690529,"endHours":28.76227370690529,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:46","end":"05:46","startHours":28.76227370690529,"endHours":29.76227370690529,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:46","end":"06:46","startHours":29.76227370690529,"endHours":30.76227370690529,"planetary_lord":"Jupiter"}],"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":"West (Paścim)","chandraVasa":"South-East","rahuVasa":"North-East","anandadiYoga":{"name":"Mausala","quality":"Inauspicious"},"tropicalRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-23.425255175821516,"eotMinutes":1.851917522468745,"ayanamsa":23.9922}},"calendars":{"vikram_samvat":2066,"vikram_samvatsara":"Śubhakṛt","saka_samvat":1931,"saka_samvatsara":"Virodhi","bengali_samvat":1416,"malayalam_era":1185,"nanakshahi_year":540,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Pauṣa","lunar_month_amanta":"Pauṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Śukla Caturthī · Vikram 2066 Śubhakṛt · Śaka 1931 Virodhi"},"festivals":[{"id":"vinayaka-chaturthi","name":"Vināyaka Caturthī (monthly)","name_sanskrit":"विनायक चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Śukla-pakṣa Caturthī; auspicious for new ventures.","vrata":true,"detection":{"tithi_number":4,"tithi_paksha":"Śukla"},"precedence":6}],"todays_walk":{"walk":{"id":"surya-walk","name":"Sūrya Walk","name_sanskrit":"सूर्य यात्रा","type":"graha","description":"Self-illumination + BG 4.1 (Sun-lineage of Gītā transmission).","step_count":6,"url":"/walk/surya-walk"},"reason":"Ravivāra (Sunday) — 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, 2009 CE · Ayodhyā · Vidhyamitra","description":"December 20, 2009 CE for Ayodhyā: Śukla Caturthī, sūryodaya 06:46, sūryāsta 17:13.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/ayodhya/2009-12-20","hreflang_alternates":{"en":"https://vidhyamitra.com/city/ayodhya/2009-12-20","sa":"https://sa.vidhyamitra.com/city/ayodhya/2009-12-20","hi":"https://hi.vidhyamitra.com/city/ayodhya/2009-12-20","x-default":"https://vidhyamitra.com/city/ayodhya/2009-12-20"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T00:45:25.868Z","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":"2026-05-31T00:45:25.869Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T00:45:25.869Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}