{"id":"vidhyamitra:city-day:rishikesh:1983-07-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1983-07-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1983-07-18","date_display":"July 18, 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":7,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2445533.770833,"kali_year":5085,"ahargana":1857068.2708,"sun":{"sidereal_longitude":90.8501,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":189.3042,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":98.454,"elapsed_within_tithi_degrees":2.454},"nakshatra":{"number":15,"name":"Svātī","pada":1,"moon_longitude":189.3042,"elapsed_within_degrees":2.6375},"yoga":{"number":22,"name":"Sādhya","sum_longitude":280.1543},"karana":{"half_tithi_index":16,"name":"Bālava"},"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":1983,"month":7,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2445533.770833,"ahargana":1857068.2708,"kali_year":5085,"ayanamsa_lahiri":23.6231,"grahas":{"sun":{"sidereal_longitude":91.258083,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":7,"name":"Punarvasu","pada":4},"retrograde":false},"moon":{"sidereal_longitude":192.56388300000003,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":2},"retrograde":false,"latitude":3.6523},"mars":{"sidereal_longitude":79.19118300000002,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":100.99958300000003,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":218.43938300000002,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":2},"retrograde":true},"venus":{"sidereal_longitude":131.347083,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":184.00028299999997,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":63.5862,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":243.5862,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","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":1983,"month":7,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2445533.770833,"kali_year":5085,"ahargana":1857068.2708,"sun":{"sidereal_longitude":90.8501,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":189.3042,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":98.454,"elapsed_within_tithi_degrees":2.454},"nakshatra":{"number":15,"name":"Svātī","pada":1,"moon_longitude":189.3042,"elapsed_within_degrees":2.6375},"yoga":{"number":22,"name":"Sādhya","sum_longitude":280.1543},"karana":{"half_tithi_index":16,"name":"Bālava"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.652,"elongation":98.454},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.652,"opposition_distance":81.546}},"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":"05:27","sunsetLocal":"19:19","solarNoonLocal":"12:23","dayLengthHours":13.868557261760222,"dayLengthDisplay":"13 Hours 52 Mins 07 Secs","nightLengthDisplay":"10 Hours 07 Mins 53 Secs","moonriseLocal":"13:37","moonsetLocal":"00:39","rahuKala":{"name":"Rāhu Kāla","start":"07:11","end":"08:55","startHours":7.179049628848401,"endHours":8.912619286568429,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:39","end":"12:23","startHours":10.646188944288456,"endHours":12.379758602008483,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:07","end":"15:51","startHours":14.113328259728512,"endHours":15.846897917448539,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:41","end":"09:09","startHours":8.68147666553909,"endHours":9.143761907597765,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:01","end":"06:24","startHours":6.023336523701715,"endHours":6.393164717348655,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:55","end":"12:51","startHours":11.91747335994981,"endHours":12.842043844067156,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:36","end":"04:31","startHours":3.596339002893677,"endHours":4.520909487011025,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:17","end":"05:27","startHours":4.289766865981688,"endHours":5.445479971128373,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:41","end":"15:37","startHours":14.691184812301854,"endHours":15.615755296419202,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:07","end":"19:31","startHours":19.114037232888595,"endHours":19.514037232888594,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:19","end":"19:54","startHours":19.314037232888595,"endHours":19.89189378546194,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:04","end":"20:49","startHours":19.064037232888595,"endHours":20.814037232888595,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:55","end":"00:51","startHours":23.91747335994981,"endHours":24.842043844067156,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"05:27","end":"07:11","startHours":5.445479971128373,"endHours":7.179049628848401,"quality":"auspicious"},{"name":"Kāla","start":"07:11","end":"08:55","startHours":7.179049628848401,"endHours":8.912619286568429,"quality":"inauspicious"},{"name":"Śubha","start":"08:55","end":"10:39","startHours":8.912619286568429,"endHours":10.646188944288456,"quality":"auspicious"},{"name":"Roga","start":"10:39","end":"12:23","startHours":10.646188944288456,"endHours":12.379758602008483,"quality":"inauspicious"},{"name":"Udveg","start":"12:23","end":"14:07","startHours":12.379758602008483,"endHours":14.113328259728512,"quality":"inauspicious"},{"name":"Chala","start":"14:07","end":"15:51","startHours":14.113328259728512,"endHours":15.846897917448539,"quality":"neutral"},{"name":"Labha","start":"15:51","end":"17:35","startHours":15.846897917448539,"endHours":17.58046757516857,"quality":"auspicious"},{"name":"Amṛta","start":"17:35","end":"19:19","startHours":17.58046757516857,"endHours":19.314037232888595,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"19:19","end":"20:35","startHours":19.314037232888595,"endHours":20.580467575168566,"quality":"neutral"},{"name":"Labha","start":"20:35","end":"21:51","startHours":20.580467575168566,"endHours":21.84689791744854,"quality":"auspicious"},{"name":"Amṛta","start":"21:51","end":"23:07","startHours":21.84689791744854,"endHours":23.11332825972851,"quality":"auspicious"},{"name":"Kāla","start":"23:07","end":"00:23","startHours":23.11332825972851,"endHours":24.379758602008483,"quality":"inauspicious"},{"name":"Śubha","start":"00:23","end":"01:39","startHours":24.379758602008483,"endHours":25.646188944288454,"quality":"auspicious"},{"name":"Roga","start":"01:39","end":"02:55","startHours":25.646188944288454,"endHours":26.91261928656843,"quality":"inauspicious"},{"name":"Udveg","start":"02:55","end":"04:11","startHours":26.91261928656843,"endHours":28.1790496288484,"quality":"inauspicious"},{"name":"Chala","start":"04:11","end":"05:27","startHours":28.1790496288484,"endHours":29.44547997112837,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"05:27","end":"06:27","startHours":5.445479971128373,"endHours":6.445479971128373,"planetary_lord":"Moon"},{"name":"Hora 2","start":"06:27","end":"07:27","startHours":6.445479971128373,"endHours":7.445479971128373,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"07:27","end":"08:27","startHours":7.445479971128373,"endHours":8.445479971128373,"planetary_lord":"Venus"},{"name":"Hora 4","start":"08:27","end":"09:27","startHours":8.445479971128373,"endHours":9.445479971128373,"planetary_lord":"Sun"},{"name":"Hora 5","start":"09:27","end":"10:27","startHours":9.445479971128373,"endHours":10.445479971128373,"planetary_lord":"Mars"},{"name":"Hora 6","start":"10:27","end":"11:27","startHours":10.445479971128373,"endHours":11.445479971128373,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"11:27","end":"12:27","startHours":11.445479971128373,"endHours":12.445479971128373,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"12:27","end":"13:27","startHours":12.445479971128373,"endHours":13.445479971128373,"planetary_lord":"Moon"},{"name":"Hora 9","start":"13:27","end":"14:27","startHours":13.445479971128373,"endHours":14.445479971128373,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"14:27","end":"15:27","startHours":14.445479971128373,"endHours":15.445479971128373,"planetary_lord":"Venus"},{"name":"Hora 11","start":"15:27","end":"16:27","startHours":15.445479971128373,"endHours":16.44547997112837,"planetary_lord":"Sun"},{"name":"Hora 12","start":"16:27","end":"17:27","startHours":16.44547997112837,"endHours":17.44547997112837,"planetary_lord":"Mars"},{"name":"Hora 13","start":"17:27","end":"18:27","startHours":17.44547997112837,"endHours":18.44547997112837,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"18:27","end":"19:27","startHours":18.44547997112837,"endHours":19.44547997112837,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"19:27","end":"20:27","startHours":19.44547997112837,"endHours":20.44547997112837,"planetary_lord":"Moon"},{"name":"Hora 16","start":"20:27","end":"21:27","startHours":20.44547997112837,"endHours":21.44547997112837,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"21:27","end":"22:27","startHours":21.44547997112837,"endHours":22.44547997112837,"planetary_lord":"Venus"},{"name":"Hora 18","start":"22:27","end":"23:27","startHours":22.44547997112837,"endHours":23.44547997112837,"planetary_lord":"Sun"},{"name":"Hora 19","start":"23:27","end":"00:27","startHours":23.44547997112837,"endHours":24.44547997112837,"planetary_lord":"Mars"},{"name":"Hora 20","start":"00:27","end":"01:27","startHours":24.44547997112837,"endHours":25.44547997112837,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"01:27","end":"02:27","startHours":25.44547997112837,"endHours":26.44547997112837,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"02:27","end":"03:27","startHours":26.44547997112837,"endHours":27.44547997112837,"planetary_lord":"Moon"},{"name":"Hora 23","start":"03:27","end":"04:27","startHours":27.44547997112837,"endHours":28.44547997112837,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"04:27","end":"05:27","startHours":28.44547997112837,"endHours":29.44547997112837,"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","Karka","Siṃha","Tulā","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Vṛścika","Makara","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"North","rahuVasa":"North-East","anandadiYoga":{"name":"Siddhi","quality":"Auspicious"},"drikRitu":"Grīṣma (Summer)","vedicRitu":"Grīṣma (Summer)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":21.15030711508578,"eotMinutes":-5.85591612050904,"ayanamsa":23.6231}},"calendars":{"vikram_samvat":2040,"vikram_samvatsara":"Dhātṛ","saka_samvat":1905,"saka_samvatsara":"Rudhirodgāri","bengali_samvat":1390,"malayalam_era":1159,"nanakshahi_year":514,"lunar_month":"Śrāvaṇa","lunar_month_paksha_full":"Śrāvaṇa Śukla Pakṣa","solar_month":"Karkaṭa (Āḍi)","ritu":"Varṣā (Monsoon)","display_summary":"Śrāvaṇa Śukla Navamī · Vikram 2040 Dhātṛ · Śaka 1905 Rudhirodgāri"},"festivals":[{"id":"karka-sankranti","name":"Karka Saṅkrānti (Dakṣiṇāyana)","name_sanskrit":"कर्क सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Cancer; Dakṣiṇāyana (south-going) begins. Devatā-rātri begins.","vrata":true,"detection":{"sun_rashi":"Karka"},"precedence":2}],"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":[{"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 July 18, 1983 CE · Ṛṣikeśa · Vidhyamitra","description":"July 18, 1983 CE for Ṛṣikeśa: Śukla Navamī, sūryodaya 05:27, sūryāsta 19:19.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1983-07-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1983-07-18","sa":"https://sa.vidhyamitra.com/city/rishikesh/1983-07-18","hi":"https://hi.vidhyamitra.com/city/rishikesh/1983-07-18","x-default":"https://vidhyamitra.com/city/rishikesh/1983-07-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T17:20:50.520Z","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":"2026-05-18T17:20:50.520Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T17:20:50.520Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}