{"id":"vidhyamitra:city-day:rishikesh:2100-04-17:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/2100-04-17","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2100-04-17","date_display":"April 17, 2100 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":2100,"month":4,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2488175.770833,"kali_year":5201,"ahargana":1899710.2708,"sun":{"sidereal_longitude":1.7775,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":87.7161,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":85.9387,"elapsed_within_tithi_degrees":1.9387},"nakshatra":{"number":7,"name":"Punarvasu","pada":3,"moon_longitude":87.7161,"elapsed_within_degrees":7.7161},"yoga":{"number":7,"name":"Sukarma","sum_longitude":89.4936},"karana":{"half_tithi_index":14,"name":"Viṣṭi"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"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":2100,"month":4,"day":17,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2488175.770833,"ahargana":1899710.2708,"kali_year":5201,"ayanamsa_lahiri":25.254,"grahas":{"sun":{"sidereal_longitude":1.884145999999987,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":84.04944599999999,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":2},"retrograde":false,"latitude":3.7509},"mars":{"sidereal_longitude":60.51704599999999,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":358.469346,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":170.743646,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":true},"venus":{"sidereal_longitude":33.30694599999998,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":true},"saturn":{"sidereal_longitude":176.464246,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":324.2078,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":144.2078,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","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":2100,"month":4,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2488175.770833,"kali_year":5201,"ahargana":1899710.2708,"sun":{"sidereal_longitude":1.7775,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":87.7161,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":85.9387,"elapsed_within_tithi_degrees":1.9387},"nakshatra":{"number":7,"name":"Punarvasu","pada":3,"moon_longitude":87.7161,"elapsed_within_degrees":7.7161},"yoga":{"number":7,"name":"Sukarma","sum_longitude":89.4936},"karana":{"half_tithi_index":14,"name":"Viṣṭi"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.751,"elongation":85.939},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.751,"opposition_distance":94.061}},"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":"05:48","sunsetLocal":"18:45","solarNoonLocal":"12:17","dayLengthHours":12.949500303368097,"dayLengthDisplay":"12 Hours 56 Mins 58 Secs","nightLengthDisplay":"11 Hours 03 Mins 02 Secs","moonriseLocal":"10:48","moonsetLocal":"00:43","rahuKala":{"name":"Rāhu Kāla","start":"09:02","end":"10:40","startHours":9.040384107829144,"endHours":10.659071645750156,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:54","end":"15:31","startHours":13.89644672159218,"endHours":15.515134259513193,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"05:48","end":"07:25","startHours":5.803009031987121,"endHours":7.421696569908133,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:49","end":"09:15","startHours":8.82455910277301,"endHours":9.25620911288528,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:21","end":"06:41","startHours":6.342571544627458,"endHours":6.687891552717274,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:51","end":"12:43","startHours":11.846109173558899,"endHours":12.709409193783438,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:05","end":"04:56","startHours":4.076408991538042,"endHours":4.939709011762581,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:43","end":"05:48","startHours":4.723884006706446,"endHours":5.803009031987121,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:26","end":"15:18","startHours":14.436009234232518,"endHours":15.299309254457057,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:33","end":"18:57","startHours":18.552509335355218,"endHours":18.952509335355217,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:45","end":"19:18","startHours":18.752509335355217,"endHours":19.292071847995555,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:30","end":"20:15","startHours":18.502509335355217,"endHours":20.252509335355217,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:51","end":"00:43","startHours":23.846109173558897,"endHours":24.70940919378344,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"05:48","end":"07:25","startHours":5.803009031987121,"endHours":7.421696569908133,"quality":"inauspicious"},{"name":"Śubha","start":"07:25","end":"09:02","startHours":7.421696569908133,"endHours":9.040384107829144,"quality":"auspicious"},{"name":"Roga","start":"09:02","end":"10:40","startHours":9.040384107829144,"endHours":10.659071645750156,"quality":"inauspicious"},{"name":"Udveg","start":"10:40","end":"12:17","startHours":10.659071645750156,"endHours":12.277759183671169,"quality":"inauspicious"},{"name":"Chala","start":"12:17","end":"13:54","startHours":12.277759183671169,"endHours":13.89644672159218,"quality":"neutral"},{"name":"Labha","start":"13:54","end":"15:31","startHours":13.89644672159218,"endHours":15.515134259513193,"quality":"auspicious"},{"name":"Amṛta","start":"15:31","end":"17:08","startHours":15.515134259513193,"endHours":17.133821797434205,"quality":"auspicious"},{"name":"Kāla","start":"17:08","end":"18:45","startHours":17.133821797434205,"endHours":18.752509335355217,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:45","end":"20:08","startHours":18.752509335355217,"endHours":20.133821797434205,"quality":"auspicious"},{"name":"Amṛta","start":"20:08","end":"21:31","startHours":20.133821797434205,"endHours":21.515134259513193,"quality":"auspicious"},{"name":"Kāla","start":"21:31","end":"22:54","startHours":21.515134259513193,"endHours":22.89644672159218,"quality":"inauspicious"},{"name":"Śubha","start":"22:54","end":"00:17","startHours":22.89644672159218,"endHours":24.27775918367117,"quality":"auspicious"},{"name":"Roga","start":"00:17","end":"01:40","startHours":24.27775918367117,"endHours":25.659071645750156,"quality":"inauspicious"},{"name":"Udveg","start":"01:40","end":"03:02","startHours":25.659071645750156,"endHours":27.040384107829144,"quality":"inauspicious"},{"name":"Chala","start":"03:02","end":"04:25","startHours":27.040384107829144,"endHours":28.421696569908132,"quality":"neutral"},{"name":"Labha","start":"04:25","end":"05:48","startHours":28.421696569908132,"endHours":29.80300903198712,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:48","end":"06:48","startHours":5.803009031987121,"endHours":6.803009031987121,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"06:48","end":"07:48","startHours":6.803009031987121,"endHours":7.803009031987121,"planetary_lord":"Moon"},{"name":"Hora 3","start":"07:48","end":"08:48","startHours":7.803009031987121,"endHours":8.80300903198712,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"08:48","end":"09:48","startHours":8.80300903198712,"endHours":9.80300903198712,"planetary_lord":"Venus"},{"name":"Hora 5","start":"09:48","end":"10:48","startHours":9.80300903198712,"endHours":10.80300903198712,"planetary_lord":"Sun"},{"name":"Hora 6","start":"10:48","end":"11:48","startHours":10.80300903198712,"endHours":11.80300903198712,"planetary_lord":"Mars"},{"name":"Hora 7","start":"11:48","end":"12:48","startHours":11.80300903198712,"endHours":12.80300903198712,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"12:48","end":"13:48","startHours":12.80300903198712,"endHours":13.80300903198712,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"13:48","end":"14:48","startHours":13.80300903198712,"endHours":14.80300903198712,"planetary_lord":"Moon"},{"name":"Hora 10","start":"14:48","end":"15:48","startHours":14.80300903198712,"endHours":15.80300903198712,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"15:48","end":"16:48","startHours":15.80300903198712,"endHours":16.80300903198712,"planetary_lord":"Venus"},{"name":"Hora 12","start":"16:48","end":"17:48","startHours":16.80300903198712,"endHours":17.80300903198712,"planetary_lord":"Sun"},{"name":"Hora 13","start":"17:48","end":"18:48","startHours":17.80300903198712,"endHours":18.80300903198712,"planetary_lord":"Mars"},{"name":"Hora 14","start":"18:48","end":"19:48","startHours":18.80300903198712,"endHours":19.80300903198712,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"19:48","end":"20:48","startHours":19.80300903198712,"endHours":20.80300903198712,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"20:48","end":"21:48","startHours":20.80300903198712,"endHours":21.80300903198712,"planetary_lord":"Moon"},{"name":"Hora 17","start":"21:48","end":"22:48","startHours":21.80300903198712,"endHours":22.80300903198712,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"22:48","end":"23:48","startHours":22.80300903198712,"endHours":23.80300903198712,"planetary_lord":"Venus"},{"name":"Hora 19","start":"23:48","end":"00:48","startHours":23.80300903198712,"endHours":24.80300903198712,"planetary_lord":"Sun"},{"name":"Hora 20","start":"00:48","end":"01:48","startHours":24.80300903198712,"endHours":25.80300903198712,"planetary_lord":"Mars"},{"name":"Hora 21","start":"01:48","end":"02:48","startHours":25.80300903198712,"endHours":26.80300903198712,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"02:48","end":"03:48","startHours":26.80300903198712,"endHours":27.80300903198712,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"03:48","end":"04:48","startHours":27.80300903198712,"endHours":28.80300903198712,"planetary_lord":"Moon"},{"name":"Hora 24","start":"04:48","end":"05:48","startHours":28.80300903198712,"endHours":29.80300903198712,"planetary_lord":"Mercury"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Hasta","Citrā","Svātī","Viśākhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Mithuna","Siṃha","Vṛścika","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Karka","Kanyā","Tulā","Makara","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"South","rahuVasa":"East","anandadiYoga":{"name":"Dhūmra","quality":"Inauspicious"},"tropicalRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":10.452521628252693,"eotMinutes":0.2640489797298191,"ayanamsa":25.254}},"calendars":{"vikram_samvat":2157,"vikram_samvatsara":"Śrīmukha","saka_samvat":2022,"saka_samvatsara":"Raudra","bengali_samvat":1507,"malayalam_era":1276,"nanakshahi_year":631,"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 Aṣṭamī · Vikram 2157 Śrīmukha · Śaka 2022 Raudra"},"festivals":[],"todays_walk":{"walk":{"id":"shani-walk","name":"Śani Walk","name_sanskrit":"शनि यात्रा","type":"graha","description":"Tapas + endurance + BG 17.14-19.","step_count":7,"url":"/walk/shani-walk"},"reason":"Śanivāra (Saturday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3137-12-25","event":"Bhīṣma's Mahaprasthan","chart_id":"bhishma","shared_marker":"same Śukla Aṣṭamī","url":"/day/-3137-12-25","relevance":0.5},{"historical_date":"-1626101-04-03","event":"Bhagavān Rāma's birth at Ayodhyā","chart_id":"rama","shared_marker":"same Punarvasu","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 17, 2100 CE · Ṛṣikeśa · Vidhyamitra","description":"April 17, 2100 CE for Ṛṣikeśa: Śukla Aṣṭamī, sūryodaya 05:48, sūryāsta 18:45.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/2100-04-17","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/2100-04-17","sa":"https://sa.vidhyamitra.com/city/rishikesh/2100-04-17","hi":"https://hi.vidhyamitra.com/city/rishikesh/2100-04-17","x-default":"https://vidhyamitra.com/city/rishikesh/2100-04-17"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T16:35:35.977Z","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":"2026-06-01T16:35:35.977Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T16:35:35.977Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}