{"id":"vidhyamitra:city-day:ayodhya:1687-12-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/ayodhya/1687-12-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1687-12-18","date_display":"December 18, 1687 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":1687,"month":12,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2337575.770833,"kali_year":4789,"ahargana":1749110.2708,"sun":{"sidereal_longitude":247.3279,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":58.9435,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":15,"name":"Pūrṇimā","paksha":"Śukla","full_name":"Śukla Pūrṇimā","elongation_degrees":171.6156,"elapsed_within_tithi_degrees":3.6156},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":2,"moon_longitude":58.9435,"elapsed_within_degrees":5.6102},"yoga":{"number":23,"name":"Śubha","sum_longitude":306.2715},"karana":{"half_tithi_index":28,"name":"Viṣṭi"},"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":1687,"month":12,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2337575.770833,"ahargana":1749110.2708,"kali_year":4789,"ayanamsa_lahiri":19.4941,"grahas":{"sun":{"sidereal_longitude":246.90867300000002,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false},"moon":{"sidereal_longitude":56.789873,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":2},"retrograde":false,"latitude":2.5936},"mars":{"sidereal_longitude":339.290473,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":269.35137299999997,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":258.770673,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":215.972573,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":187.72557299999994,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":23.7205,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":203.7205,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","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":1687,"month":12,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2337575.770833,"kali_year":4789,"ahargana":1749110.2708,"sun":{"sidereal_longitude":247.3279,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":58.9435,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":15,"name":"Pūrṇimā","paksha":"Śukla","full_name":"Śukla Pūrṇimā","elongation_degrees":171.6156,"elapsed_within_tithi_degrees":3.6156},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":2,"moon_longitude":58.9435,"elapsed_within_degrees":5.6102},"yoga":{"number":23,"name":"Śubha","sum_longitude":306.2715},"karana":{"half_tithi_index":28,"name":"Viṣṭi"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.594,"elongation":171.616},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.594,"opposition_distance":8.384}},"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":"06:45","sunsetLocal":"17:12","solarNoonLocal":"11:58","dayLengthHours":10.456225321643178,"dayLengthDisplay":"10 Hours 27 Mins 22 Secs","nightLengthDisplay":"13 Hours 32 Mins 38 Secs","moonriseLocal":"16:26","moonsetLocal":"06:10","rahuKala":{"name":"Rāhu Kāla","start":"13:17","end":"14:35","startHours":13.28029937606971,"endHours":14.587327541275108,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"06:45","end":"08:03","startHours":6.745158550042725,"endHours":8.052186715248123,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"09:22","end":"10:40","startHours":9.35921488045352,"endHours":10.666243045658916,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:11","end":"09:32","startHours":9.184944458426134,"endHours":9.533485302480905,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:11","end":"07:28","startHours":7.18083460511119,"endHours":7.459667280355008,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:37","end":"12:19","startHours":11.62473036680954,"endHours":12.321812054919086,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:21","end":"06:03","startHours":5.350995173823635,"endHours":6.04807686193318,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:52","end":"06:45","startHours":5.873806439905794,"endHours":6.745158550042725,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:43","end":"14:25","startHours":13.715975431138176,"endHours":14.413057119247721,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:00","end":"17:24","startHours":17.001383871685903,"endHours":17.4013838716859,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:12","end":"17:38","startHours":17.201383871685902,"endHours":17.637059926754368,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"16:57","end":"18:42","startHours":16.951383871685902,"endHours":18.701383871685902,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:37","end":"00:19","startHours":23.624730366809537,"endHours":24.321812054919086,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"06:45","end":"08:03","startHours":6.745158550042725,"endHours":8.052186715248123,"quality":"auspicious"},{"name":"Roga","start":"08:03","end":"09:22","startHours":8.052186715248123,"endHours":9.35921488045352,"quality":"inauspicious"},{"name":"Udveg","start":"09:22","end":"10:40","startHours":9.35921488045352,"endHours":10.666243045658916,"quality":"inauspicious"},{"name":"Chala","start":"10:40","end":"11:58","startHours":10.666243045658916,"endHours":11.973271210864315,"quality":"neutral"},{"name":"Labha","start":"11:58","end":"13:17","startHours":11.973271210864315,"endHours":13.28029937606971,"quality":"auspicious"},{"name":"Amṛta","start":"13:17","end":"14:35","startHours":13.28029937606971,"endHours":14.587327541275108,"quality":"auspicious"},{"name":"Kāla","start":"14:35","end":"15:54","startHours":14.587327541275108,"endHours":15.894355706480507,"quality":"inauspicious"},{"name":"Śubha","start":"15:54","end":"17:12","startHours":15.894355706480507,"endHours":17.201383871685902,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"17:12","end":"18:54","startHours":17.201383871685902,"endHours":18.894355706480503,"quality":"auspicious"},{"name":"Kāla","start":"18:54","end":"20:35","startHours":18.894355706480503,"endHours":20.58732754127511,"quality":"inauspicious"},{"name":"Śubha","start":"20:35","end":"22:17","startHours":20.58732754127511,"endHours":22.28029937606971,"quality":"auspicious"},{"name":"Roga","start":"22:17","end":"23:58","startHours":22.28029937606971,"endHours":23.97327121086431,"quality":"inauspicious"},{"name":"Udveg","start":"23:58","end":"01:40","startHours":23.97327121086431,"endHours":25.666243045658916,"quality":"inauspicious"},{"name":"Chala","start":"01:40","end":"03:22","startHours":25.666243045658916,"endHours":27.359214880453518,"quality":"neutral"},{"name":"Labha","start":"03:22","end":"05:03","startHours":27.359214880453518,"endHours":29.05218671524812,"quality":"auspicious"},{"name":"Amṛta","start":"05:03","end":"06:45","startHours":29.05218671524812,"endHours":30.745158550042724,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:45","end":"07:45","startHours":6.745158550042725,"endHours":7.745158550042725,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"07:45","end":"08:45","startHours":7.745158550042725,"endHours":8.745158550042724,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"08:45","end":"09:45","startHours":8.745158550042724,"endHours":9.745158550042724,"planetary_lord":"Moon"},{"name":"Hora 4","start":"09:45","end":"10:45","startHours":9.745158550042724,"endHours":10.745158550042724,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"10:45","end":"11:45","startHours":10.745158550042724,"endHours":11.745158550042724,"planetary_lord":"Venus"},{"name":"Hora 6","start":"11:45","end":"12:45","startHours":11.745158550042724,"endHours":12.745158550042724,"planetary_lord":"Sun"},{"name":"Hora 7","start":"12:45","end":"13:45","startHours":12.745158550042724,"endHours":13.745158550042724,"planetary_lord":"Mars"},{"name":"Hora 8","start":"13:45","end":"14:45","startHours":13.745158550042724,"endHours":14.745158550042724,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"14:45","end":"15:45","startHours":14.745158550042724,"endHours":15.745158550042724,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"15:45","end":"16:45","startHours":15.745158550042724,"endHours":16.745158550042724,"planetary_lord":"Moon"},{"name":"Hora 11","start":"16:45","end":"17:45","startHours":16.745158550042724,"endHours":17.745158550042724,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"17:45","end":"18:45","startHours":17.745158550042724,"endHours":18.745158550042724,"planetary_lord":"Venus"},{"name":"Hora 13","start":"18:45","end":"19:45","startHours":18.745158550042724,"endHours":19.745158550042724,"planetary_lord":"Sun"},{"name":"Hora 14","start":"19:45","end":"20:45","startHours":19.745158550042724,"endHours":20.745158550042724,"planetary_lord":"Mars"},{"name":"Hora 15","start":"20:45","end":"21:45","startHours":20.745158550042724,"endHours":21.745158550042724,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"21:45","end":"22:45","startHours":21.745158550042724,"endHours":22.745158550042724,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"22:45","end":"23:45","startHours":22.745158550042724,"endHours":23.745158550042724,"planetary_lord":"Moon"},{"name":"Hora 18","start":"23:45","end":"00:45","startHours":23.745158550042724,"endHours":24.745158550042724,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"00:45","end":"01:45","startHours":24.745158550042724,"endHours":25.745158550042724,"planetary_lord":"Venus"},{"name":"Hora 20","start":"01:45","end":"02:45","startHours":25.745158550042724,"endHours":26.745158550042724,"planetary_lord":"Sun"},{"name":"Hora 21","start":"02:45","end":"03:45","startHours":26.745158550042724,"endHours":27.745158550042724,"planetary_lord":"Mars"},{"name":"Hora 22","start":"03:45","end":"04:45","startHours":27.745158550042724,"endHours":28.745158550042724,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"04:45","end":"05:45","startHours":28.745158550042724,"endHours":29.745158550042724,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"05:45","end":"06:45","startHours":29.745158550042724,"endHours":30.745158550042724,"planetary_lord":"Moon"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Maghā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Karka","Tulā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Siṃha","Kanyā","Dhanu","Makara"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"South-East","rahuVasa":"North-West","anandadiYoga":{"name":"Amṛta","quality":"Auspicious"},"tropicalRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-23.38757347615809,"eotMinutes":2.787727348141232,"ayanamsa":19.4941}},"calendars":{"vikram_samvat":1744,"vikram_samvatsara":"Vikrama","saka_samvat":1609,"saka_samvatsara":"Prabhava","bengali_samvat":1094,"malayalam_era":863,"nanakshahi_year":218,"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":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Mārgaśīrṣa Śukla Pūrṇimā · Vikram 1744 Vikrama · Śaka 1609 Prabhava"},"festivals":[{"id":"datta-jayanti","name":"Datta Jayantī","name_sanskrit":"दत्त जयन्ती","tradition":"Pan-Hindu","associated_deity":"Dattātreya (Brahmā + Viṣṇu + Śiva combined)","significance":"Birth of Dattātreya from Atri-Anusūyā; tri-mūrti unified avatāra.","vrata":true,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Mārgaśīrṣa"},"precedence":2,"sources":["Mārkaṇḍeya Purāṇa","Bhāgavata 4.1.15"]},{"id":"annapurna-jayanti","name":"Annapūrṇā Jayantī","name_sanskrit":"अन्नपूर्णा जयन्ती","tradition":"Shakta","associated_deity":"Devī Annapūrṇā (Pārvatī as nourishing mother)","significance":"Devī Annapūrṇā's manifestation; food-grain pūjā; Mārgaśīrṣa Pūrṇimā tradition.","vrata":true,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Mārgaśīrṣa"},"precedence":3,"sources":["Annapūrṇā-stotra by Śaṅkarācārya"]}],"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":[{"historical_date":"-3137-10-04","event":"Mahābhārata Day 1 (Bhagavad Gītā delivered)","chart_id":"krishna","shared_marker":"same Śukla Pūrṇimā","url":"/day/-3137-10-04","relevance":0.5},{"historical_date":"-0562-04-11","event":"Bhagavān Buddha's birth at Lumbinī","chart_id":"buddha","shared_marker":"same Śukla Pūrṇimā","url":"/day/-0562-04-11","relevance":0.5}]},"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 18, 1687 CE · Ayodhyā · Vidhyamitra","description":"December 18, 1687 CE for Ayodhyā: Śukla Pūrṇimā, sūryodaya 06:45, sūryāsta 17:12.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/ayodhya/1687-12-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/ayodhya/1687-12-18","sa":"https://sa.vidhyamitra.com/city/ayodhya/1687-12-18","hi":"https://hi.vidhyamitra.com/city/ayodhya/1687-12-18","x-default":"https://vidhyamitra.com/city/ayodhya/1687-12-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-03T09:56:00.861Z","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":"2026-06-03T09:56:00.861Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-03T09:56:00.861Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}