{"id":"vidhyamitra:city-day:rishikesh:1983-04-21:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1983-04-21","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1983-04-21","date_display":"April 21, 1983 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":1983,"month":4,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2445445.770833,"kali_year":5085,"ahargana":1856980.2708,"sun":{"sidereal_longitude":6.9128,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":106.4003,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":99.4876,"elapsed_within_tithi_degrees":3.4876},"nakshatra":{"number":8,"name":"Puṣya","pada":4,"moon_longitude":106.4003,"elapsed_within_degrees":13.067},"yoga":{"number":9,"name":"Śūla","sum_longitude":113.3131},"karana":{"half_tithi_index":16,"name":"Bālava"},"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":1983,"month":4,"day":21,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2445445.770833,"ahargana":1856980.2708,"kali_year":5085,"ayanamsa_lahiri":23.6197,"grahas":{"sun":{"sidereal_longitude":6.7664459999999735,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":3},"retrograde":false},"moon":{"sidereal_longitude":105.554846,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false,"latitude":2.7781},"mars":{"sidereal_longitude":18.007145999999977,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":27.011645999999985,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":227.17734599999994,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"retrograde":true},"venus":{"sidereal_longitude":45.509546,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":187.27324599999997,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":68.2488,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":248.2488,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"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":1983,"month":4,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2445445.770833,"kali_year":5085,"ahargana":1856980.2708,"sun":{"sidereal_longitude":6.9128,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":106.4003,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":99.4876,"elapsed_within_tithi_degrees":3.4876},"nakshatra":{"number":8,"name":"Puṣya","pada":4,"moon_longitude":106.4003,"elapsed_within_degrees":13.067},"yoga":{"number":9,"name":"Śūla","sum_longitude":113.3131},"karana":{"half_tithi_index":16,"name":"Bālava"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.778,"elongation":99.488},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.778,"opposition_distance":80.512}},"eclipse_window_40days":[]},"city":{"slug":"rishikesh","name":"Ṛṣikeśa","lat":30.0869,"lon":78.2676,"tz_offset_hours":5.5,"state":"Uttarakhand","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"rishikesh","name":"Ṛṣikeśa","lat":30.0869,"lon":78.2676,"tz_offset_hours":5.5,"state":"Uttarakhand","country":"IN","tier":"tirtha"},"sunriseLocal":"05:44","sunsetLocal":"18:47","solarNoonLocal":"12:16","dayLengthHours":13.043317983250006,"dayLengthDisplay":"13 Hours 02 Mins 36 Secs","nightLengthDisplay":"10 Hours 57 Mins 24 Secs","moonriseLocal":"12:05","moonsetLocal":"01:37","rahuKala":{"name":"Rāhu Kāla","start":"13:54","end":"15:31","startHours":13.89278593388688,"endHours":15.523200681793131,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"05:44","end":"07:22","startHours":5.740712194355626,"endHours":7.371126942261877,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"09:00","end":"10:38","startHours":9.001541690168128,"endHours":10.63195643807438,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:47","end":"09:13","startHours":8.784153057113961,"endHours":9.218930323222294,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:17","end":"06:38","startHours":6.284183776991043,"endHours":6.63200558987771,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:50","end":"12:42","startHours":11.827593919872296,"endHours":12.697148452088964,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:00","end":"04:52","startHours":4.001603129922292,"endHours":4.871157662138959,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:39","end":"05:44","startHours":4.653769029084792,"endHours":5.740712194355626,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:26","end":"15:18","startHours":14.436257516522296,"endHours":15.305812048738963,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:35","end":"18:59","startHours":18.584030177605634,"endHours":18.984030177605632,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:47","end":"19:20","startHours":18.784030177605633,"endHours":19.32750176024105,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:32","end":"20:17","startHours":18.534030177605633,"endHours":20.284030177605633,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:50","end":"00:42","startHours":23.827593919872296,"endHours":24.697148452088964,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"05:44","end":"07:22","startHours":5.740712194355626,"endHours":7.371126942261877,"quality":"auspicious"},{"name":"Roga","start":"07:22","end":"09:00","startHours":7.371126942261877,"endHours":9.001541690168128,"quality":"inauspicious"},{"name":"Udveg","start":"09:00","end":"10:38","startHours":9.001541690168128,"endHours":10.63195643807438,"quality":"inauspicious"},{"name":"Chala","start":"10:38","end":"12:16","startHours":10.63195643807438,"endHours":12.26237118598063,"quality":"neutral"},{"name":"Labha","start":"12:16","end":"13:54","startHours":12.26237118598063,"endHours":13.89278593388688,"quality":"auspicious"},{"name":"Amṛta","start":"13:54","end":"15:31","startHours":13.89278593388688,"endHours":15.523200681793131,"quality":"auspicious"},{"name":"Kāla","start":"15:31","end":"17:09","startHours":15.523200681793131,"endHours":17.153615429699382,"quality":"inauspicious"},{"name":"Śubha","start":"17:09","end":"18:47","startHours":17.153615429699382,"endHours":18.784030177605633,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"18:47","end":"20:09","startHours":18.784030177605633,"endHours":20.153615429699382,"quality":"auspicious"},{"name":"Kāla","start":"20:09","end":"21:31","startHours":20.153615429699382,"endHours":21.52320068179313,"quality":"inauspicious"},{"name":"Śubha","start":"21:31","end":"22:54","startHours":21.52320068179313,"endHours":22.89278593388688,"quality":"auspicious"},{"name":"Roga","start":"22:54","end":"00:16","startHours":22.89278593388688,"endHours":24.26237118598063,"quality":"inauspicious"},{"name":"Udveg","start":"00:16","end":"01:38","startHours":24.26237118598063,"endHours":25.63195643807438,"quality":"inauspicious"},{"name":"Chala","start":"01:38","end":"03:00","startHours":25.63195643807438,"endHours":27.00154169016813,"quality":"neutral"},{"name":"Labha","start":"03:00","end":"04:22","startHours":27.00154169016813,"endHours":28.371126942261878,"quality":"auspicious"},{"name":"Amṛta","start":"04:22","end":"05:44","startHours":28.371126942261878,"endHours":29.740712194355627,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:44","end":"06:44","startHours":5.740712194355626,"endHours":6.740712194355626,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"06:44","end":"07:44","startHours":6.740712194355626,"endHours":7.740712194355626,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"07:44","end":"08:44","startHours":7.740712194355626,"endHours":8.740712194355627,"planetary_lord":"Moon"},{"name":"Hora 4","start":"08:44","end":"09:44","startHours":8.740712194355627,"endHours":9.740712194355627,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"09:44","end":"10:44","startHours":9.740712194355627,"endHours":10.740712194355627,"planetary_lord":"Venus"},{"name":"Hora 6","start":"10:44","end":"11:44","startHours":10.740712194355627,"endHours":11.740712194355627,"planetary_lord":"Sun"},{"name":"Hora 7","start":"11:44","end":"12:44","startHours":11.740712194355627,"endHours":12.740712194355627,"planetary_lord":"Mars"},{"name":"Hora 8","start":"12:44","end":"13:44","startHours":12.740712194355627,"endHours":13.740712194355627,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"13:44","end":"14:44","startHours":13.740712194355627,"endHours":14.740712194355627,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"14:44","end":"15:44","startHours":14.740712194355627,"endHours":15.740712194355627,"planetary_lord":"Moon"},{"name":"Hora 11","start":"15:44","end":"16:44","startHours":15.740712194355627,"endHours":16.740712194355627,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"16:44","end":"17:44","startHours":16.740712194355627,"endHours":17.740712194355627,"planetary_lord":"Venus"},{"name":"Hora 13","start":"17:44","end":"18:44","startHours":17.740712194355627,"endHours":18.740712194355627,"planetary_lord":"Sun"},{"name":"Hora 14","start":"18:44","end":"19:44","startHours":18.740712194355627,"endHours":19.740712194355627,"planetary_lord":"Mars"},{"name":"Hora 15","start":"19:44","end":"20:44","startHours":19.740712194355627,"endHours":20.740712194355627,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"20:44","end":"21:44","startHours":20.740712194355627,"endHours":21.740712194355627,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"21:44","end":"22:44","startHours":21.740712194355627,"endHours":22.740712194355627,"planetary_lord":"Moon"},{"name":"Hora 18","start":"22:44","end":"23:44","startHours":22.740712194355627,"endHours":23.740712194355627,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"23:44","end":"00:44","startHours":23.740712194355627,"endHours":24.740712194355627,"planetary_lord":"Venus"},{"name":"Hora 20","start":"00:44","end":"01:44","startHours":24.740712194355627,"endHours":25.740712194355627,"planetary_lord":"Sun"},{"name":"Hora 21","start":"01:44","end":"02:44","startHours":25.740712194355627,"endHours":26.740712194355627,"planetary_lord":"Mars"},{"name":"Hora 22","start":"02:44","end":"03:44","startHours":26.740712194355627,"endHours":27.740712194355627,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"03:44","end":"04:44","startHours":27.740712194355627,"endHours":28.740712194355627,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"04:44","end":"05:44","startHours":28.740712194355627,"endHours":29.740712194355627,"planetary_lord":"Moon"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Revatī"],"unfavorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Citrā","Svātī","Viśākhā","Anurādhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Vṛṣabha","Karka","Kanyā","Dhanu","Makara"],"unfavorable_rashis":["Mithuna","Siṃha","Tulā","Vṛścika","Kumbha","Mīna"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"South-West","rahuVasa":"North-West","anandadiYoga":{"name":"Mātaṇga","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring) (tropical)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":11.606152016005531,"eotMinutes":1.1873288411622274,"ayanamsa":23.6197}},"calendars":{"vikram_samvat":2040,"vikram_samvatsara":"Dhātṛ","saka_samvat":1905,"saka_samvatsara":"Rudhirodgāri","bengali_samvat":1390,"malayalam_era":1159,"nanakshahi_year":514,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Caitra","lunar_month_amanta":"Caitra","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Caitra Śukla Navamī · Vikram 2040 Dhātṛ · Śaka 1905 Rudhirodgāri"},"festivals":[{"id":"rama-navami","name":"Rāma Navamī","name_sanskrit":"राम नवमी","tradition":"Vaishnava","associated_deity":"Rāma (18th avatāra of Krishna)","deity_avatara_index":18,"significance":"Bhagavān Rāma's birth at Ayodhyā. Sūryavaṃśa's most exalted moment.","vrata":true,"primary_observance":"Madhyāhna (noon) abhiṣekam in Ayodhyā tradition","detection":{"tithi_number":9,"tithi_paksha":"Śukla","lunar_month":"Caitra"},"precedence":1,"related_chart":"rama","historical_anchor":{"event":"Bhagavān Rāma's birth at Ayodhyā","date_julian":"-1626101-04-03","location":"Ayodhyā"},"sources":["Vālmīki Rāmāyaṇa, Bāla-Kāṇḍa 1.18"]}],"todays_walk":{"walk":{"id":"rama-navami-walk","name":"Rāma Navamī Walk","name_sanskrit":"राम नवमी यात्रा","type":"festival","description":"Vālmīki Bāla-Kāṇḍa selections + BG 4.7-8 (avatāra principle).","step_count":9,"url":"/walk/rama-navami-walk"},"reason":"Today is Rāma Navamī — its dedicated walk."},"cosmic_resonances":[{"historical_date":"-1626101-04-03","event":"Bhagavān Rāma's birth at Ayodhyā","chart_id":"rama","shared_marker":"same Śukla Navamī","url":"/day/-1626101-04-03","relevance":0.5}]},"validity":{"eternal":false,"location_specific":"rishikesh"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga April 21, 1983 CE · Ṛṣikeśa · Vidhyamitra","description":"April 21, 1983 CE for Ṛṣikeśa: Śukla Navamī, sūryodaya 05:44, sūryāsta 18:47.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1983-04-21","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1983-04-21","sa":"https://sa.vidhyamitra.com/city/rishikesh/1983-04-21","hi":"https://hi.vidhyamitra.com/city/rishikesh/1983-04-21","x-default":"https://vidhyamitra.com/city/rishikesh/1983-04-21"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T20:58:47.242Z","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":"2026-05-31T20:58:47.242Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T20:58:47.242Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}