{"id":"vidhyamitra:city-day:ayodhya:1660-01-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/ayodhya/1660-01-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1660-01-18","date_display":"January 18, 1660 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":1660,"month":1,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2327379.770833,"kali_year":4761,"ahargana":1738914.2708,"sun":{"sidereal_longitude":279.4255,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":351.2569,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":6,"name":"Ṣaṣṭhī","paksha":"Śukla","full_name":"Śukla Ṣaṣṭhī","elongation_degrees":71.8314,"elapsed_within_tithi_degrees":11.8314},"nakshatra":{"number":27,"name":"Revatī","pada":2,"moon_longitude":351.2569,"elapsed_within_degrees":4.5902},"yoga":{"number":21,"name":"Siddha","sum_longitude":270.6825},"karana":{"half_tithi_index":11,"name":"Taitila"},"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":1660,"month":1,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2327379.770833,"ahargana":1738914.2708,"kali_year":4761,"ayanamsa_lahiri":19.1041,"grahas":{"sun":{"sidereal_longitude":278.682235,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":353.621535,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":3},"retrograde":false,"latitude":2.4291},"mars":{"sidereal_longitude":48.471434999999985,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":296.49983499999996,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":true},"jupiter":{"sidereal_longitude":147.95673499999998,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":true},"venus":{"sidereal_longitude":296.0793349999999,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":206.88353499999994,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":203.9537,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":23.9537,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","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":1660,"month":1,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2327379.770833,"kali_year":4761,"ahargana":1738914.2708,"sun":{"sidereal_longitude":279.4255,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":351.2569,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":6,"name":"Ṣaṣṭhī","paksha":"Śukla","full_name":"Śukla Ṣaṣṭhī","elongation_degrees":71.8314,"elapsed_within_tithi_degrees":11.8314},"nakshatra":{"number":27,"name":"Revatī","pada":2,"moon_longitude":351.2569,"elapsed_within_degrees":4.5902},"yoga":{"number":21,"name":"Siddha","sum_longitude":270.6825},"karana":{"half_tithi_index":11,"name":"Taitila"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.429,"elongation":71.831},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.429,"opposition_distance":108.169}},"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":"06:51","sunsetLocal":"17:32","solarNoonLocal":"12:12","dayLengthHours":10.675744949883239,"dayLengthDisplay":"10 Hours 40 Mins 33 Secs","nightLengthDisplay":"13 Hours 19 Mins 27 Secs","moonriseLocal":"10:58","moonsetLocal":"23:24","rahuKala":{"name":"Rāhu Kāla","start":"16:12","end":"17:32","startHours":16.195624849234378,"endHours":17.530092967969782,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:12","end":"13:32","startHours":12.192220493028163,"endHours":13.526688611763568,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:52","end":"16:12","startHours":14.861156730498973,"endHours":16.195624849234378,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:21","end":"09:42","startHours":9.345355173059298,"endHours":9.701213338055407,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:18","end":"07:35","startHours":7.2991707243316775,"endHours":7.583857256328564,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:50","end":"12:33","startHours":11.836362328032054,"endHours":12.548078658024272,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:26","end":"06:09","startHours":5.430915358102111,"endHours":6.142631688094327,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:58","end":"06:51","startHours":5.964702605596273,"endHours":6.854348018086543,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:58","end":"14:41","startHours":13.971511318008702,"endHours":14.683227648000917,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:20","end":"17:44","startHours":17.330092967969783,"endHours":17.73009296796978,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:32","end":"17:58","startHours":17.530092967969782,"endHours":17.974915674214916,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:17","end":"19:02","startHours":17.280092967969782,"endHours":19.030092967969782,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:50","end":"00:33","startHours":23.836362328032056,"endHours":24.54807865802427,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:51","end":"08:11","startHours":6.854348018086543,"endHours":8.188816136821949,"quality":"inauspicious"},{"name":"Chala","start":"08:11","end":"09:31","startHours":8.188816136821949,"endHours":9.523284255557353,"quality":"neutral"},{"name":"Labha","start":"09:31","end":"10:51","startHours":9.523284255557353,"endHours":10.857752374292758,"quality":"auspicious"},{"name":"Amṛta","start":"10:51","end":"12:12","startHours":10.857752374292758,"endHours":12.192220493028163,"quality":"auspicious"},{"name":"Kāla","start":"12:12","end":"13:32","startHours":12.192220493028163,"endHours":13.526688611763568,"quality":"inauspicious"},{"name":"Śubha","start":"13:32","end":"14:52","startHours":13.526688611763568,"endHours":14.861156730498973,"quality":"auspicious"},{"name":"Roga","start":"14:52","end":"16:12","startHours":14.861156730498973,"endHours":16.195624849234378,"quality":"inauspicious"},{"name":"Udveg","start":"16:12","end":"17:32","startHours":16.195624849234378,"endHours":17.530092967969782,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"17:32","end":"19:12","startHours":17.530092967969782,"endHours":19.195624849234378,"quality":"auspicious"},{"name":"Roga","start":"19:12","end":"20:52","startHours":19.195624849234378,"endHours":20.861156730498973,"quality":"inauspicious"},{"name":"Udveg","start":"20:52","end":"22:32","startHours":20.861156730498973,"endHours":22.526688611763568,"quality":"inauspicious"},{"name":"Chala","start":"22:32","end":"00:12","startHours":22.526688611763568,"endHours":24.192220493028163,"quality":"neutral"},{"name":"Labha","start":"00:12","end":"01:51","startHours":24.192220493028163,"endHours":25.857752374292758,"quality":"auspicious"},{"name":"Amṛta","start":"01:51","end":"03:31","startHours":25.857752374292758,"endHours":27.523284255557353,"quality":"auspicious"},{"name":"Kāla","start":"03:31","end":"05:11","startHours":27.523284255557353,"endHours":29.18881613682195,"quality":"inauspicious"},{"name":"Śubha","start":"05:11","end":"06:51","startHours":29.18881613682195,"endHours":30.854348018086544,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:51","end":"07:51","startHours":6.854348018086543,"endHours":7.854348018086543,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:51","end":"08:51","startHours":7.854348018086543,"endHours":8.854348018086544,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:51","end":"09:51","startHours":8.854348018086544,"endHours":9.854348018086544,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:51","end":"10:51","startHours":9.854348018086544,"endHours":10.854348018086544,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:51","end":"11:51","startHours":10.854348018086544,"endHours":11.854348018086544,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:51","end":"12:51","startHours":11.854348018086544,"endHours":12.854348018086544,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:51","end":"13:51","startHours":12.854348018086544,"endHours":13.854348018086544,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:51","end":"14:51","startHours":13.854348018086544,"endHours":14.854348018086544,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:51","end":"15:51","startHours":14.854348018086544,"endHours":15.854348018086544,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:51","end":"16:51","startHours":15.854348018086544,"endHours":16.854348018086544,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:51","end":"17:51","startHours":16.854348018086544,"endHours":17.854348018086544,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:51","end":"18:51","startHours":17.854348018086544,"endHours":18.854348018086544,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:51","end":"19:51","startHours":18.854348018086544,"endHours":19.854348018086544,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:51","end":"20:51","startHours":19.854348018086544,"endHours":20.854348018086544,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:51","end":"21:51","startHours":20.854348018086544,"endHours":21.854348018086544,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:51","end":"22:51","startHours":21.854348018086544,"endHours":22.854348018086544,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:51","end":"23:51","startHours":22.854348018086544,"endHours":23.854348018086544,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:51","end":"00:51","startHours":23.854348018086544,"endHours":24.854348018086544,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:51","end":"01:51","startHours":24.854348018086544,"endHours":25.854348018086544,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:51","end":"02:51","startHours":25.854348018086544,"endHours":26.854348018086544,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:51","end":"03:51","startHours":26.854348018086544,"endHours":27.854348018086544,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:51","end":"04:51","startHours":27.854348018086544,"endHours":28.854348018086544,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:51","end":"05:51","startHours":28.854348018086544,"endHours":29.854348018086544,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:51","end":"06:51","startHours":29.854348018086544,"endHours":30.854348018086544,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"unfavorable_nakshatras":["Ārdrā","Punarvasu","Puṣya","Aśleṣā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Siṃha","Kanyā","Dhanu","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Karka","Tulā","Vṛścika","Kumbha"]},"dishaShool":"West (Paścim)","chandraVasa":"South-West","rahuVasa":"North-East","anandadiYoga":{"name":"Sushira","quality":"Auspicious"},"tropicalRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-20.601784322665775,"eotMinutes":-10.349229581689698,"ayanamsa":19.1041}},"calendars":{"vikram_samvat":1717,"vikram_samvatsara":"Pramādī","saka_samvat":1582,"saka_samvatsara":"Śārvarī","bengali_samvat":1067,"malayalam_era":836,"nanakshahi_year":191,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Māgha","lunar_month_amanta":"Māgha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Śukla Ṣaṣṭhī · Vikram 1717 Pramādī · Śaka 1582 Śārvarī"},"festivals":[],"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 January 18, 1660 CE · Ayodhyā · Vidhyamitra","description":"January 18, 1660 CE for Ayodhyā: Śukla Ṣaṣṭhī, sūryodaya 06:51, sūryāsta 17:32.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/ayodhya/1660-01-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/ayodhya/1660-01-18","sa":"https://sa.vidhyamitra.com/city/ayodhya/1660-01-18","hi":"https://hi.vidhyamitra.com/city/ayodhya/1660-01-18","x-default":"https://vidhyamitra.com/city/ayodhya/1660-01-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-05T10:20:21.936Z","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":"2026-06-05T10:20:21.936Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-05T10:20:21.936Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}