{"id":"vidhyamitra:city-day:rishikesh:1877-04-17:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1877-04-17","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1877-04-17","date_display":"April 17, 1877 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":1877,"month":4,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2406726.770833,"kali_year":4979,"ahargana":1818261.2708,"sun":{"sidereal_longitude":5.3843,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":46.3081,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":40.9238,"elapsed_within_tithi_degrees":4.9238},"nakshatra":{"number":4,"name":"Rohiṇī","pada":2,"moon_longitude":46.3081,"elapsed_within_degrees":6.3081},"yoga":{"number":4,"name":"Saubhāgya","sum_longitude":51.6924},"karana":{"half_tithi_index":6,"name":"Vaṇija"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"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":1877,"month":4,"day":17,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2406726.770833,"ahargana":1818261.2708,"kali_year":4979,"ayanamsa_lahiri":22.1389,"grahas":{"sun":{"sidereal_longitude":4.984295999999972,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":45.871695999999986,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":2},"retrograde":false,"latitude":4.4918},"mars":{"sidereal_longitude":279.427496,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":18.15579600000001,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":253.010896,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":4},"retrograde":false},"venus":{"sidereal_longitude":1.4595959999999764,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":324.998196,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":319.7678,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":139.7678,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","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":1877,"month":4,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2406726.770833,"kali_year":4979,"ahargana":1818261.2708,"sun":{"sidereal_longitude":5.3843,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":46.3081,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":40.9238,"elapsed_within_tithi_degrees":4.9238},"nakshatra":{"number":4,"name":"Rohiṇī","pada":2,"moon_longitude":46.3081,"elapsed_within_degrees":6.3081},"yoga":{"number":4,"name":"Saubhāgya","sum_longitude":51.6924},"karana":{"half_tithi_index":6,"name":"Vaṇija"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.492,"elongation":40.924},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.492,"opposition_distance":139.076}},"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":12.9490648560554,"dayLengthDisplay":"12 Hours 56 Mins 57 Secs","nightLengthDisplay":"11 Hours 03 Mins 03 Secs","moonriseLocal":"08:04","moonsetLocal":"21:56","rahuKala":{"name":"Rāhu Kāla","start":"15:31","end":"17:08","startHours":15.515025397685019,"endHours":17.133658504691944,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:02","end":"10:40","startHours":9.040492969657318,"endHours":10.659126076664243,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:17","end":"13:54","startHours":12.277759183671169,"endHours":13.896392290678094,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:49","end":"09:15","startHours":8.824675222056394,"endHours":9.256310717258241,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:21","end":"06:41","startHours":6.342771124645775,"endHours":6.6880795208072525,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:51","end":"12:43","startHours":11.846123688469321,"endHours":12.709394678873016,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:05","end":"04:56","startHours":4.076684774836081,"endHours":4.939955765239774,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:43","end":"05:48","startHours":4.72413801763885,"endHours":5.803226755643467,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:26","end":"15:18","startHours":14.4359366596804,"endHours":15.299207650084094,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:33","end":"18:57","startHours":18.55229161169887,"endHours":18.952291611698868,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:45","end":"19:18","startHours":18.75229161169887,"endHours":19.291835980701176,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:30","end":"20:15","startHours":18.50229161169887,"endHours":20.25229161169887,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:51","end":"00:43","startHours":23.846123688469323,"endHours":24.709394678873014,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"05:48","end":"07:25","startHours":5.803226755643467,"endHours":7.421859862650392,"quality":"inauspicious"},{"name":"Udveg","start":"07:25","end":"09:02","startHours":7.421859862650392,"endHours":9.040492969657318,"quality":"inauspicious"},{"name":"Chala","start":"09:02","end":"10:40","startHours":9.040492969657318,"endHours":10.659126076664243,"quality":"neutral"},{"name":"Labha","start":"10:40","end":"12:17","startHours":10.659126076664243,"endHours":12.277759183671169,"quality":"auspicious"},{"name":"Amṛta","start":"12:17","end":"13:54","startHours":12.277759183671169,"endHours":13.896392290678094,"quality":"auspicious"},{"name":"Kāla","start":"13:54","end":"15:31","startHours":13.896392290678094,"endHours":15.515025397685019,"quality":"inauspicious"},{"name":"Śubha","start":"15:31","end":"17:08","startHours":15.515025397685019,"endHours":17.133658504691944,"quality":"auspicious"},{"name":"Roga","start":"17:08","end":"18:45","startHours":17.133658504691944,"endHours":18.75229161169887,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"18:45","end":"20:08","startHours":18.75229161169887,"endHours":20.133658504691944,"quality":"inauspicious"},{"name":"Śubha","start":"20:08","end":"21:31","startHours":20.133658504691944,"endHours":21.51502539768502,"quality":"auspicious"},{"name":"Roga","start":"21:31","end":"22:54","startHours":21.51502539768502,"endHours":22.896392290678094,"quality":"inauspicious"},{"name":"Udveg","start":"22:54","end":"00:17","startHours":22.896392290678094,"endHours":24.27775918367117,"quality":"inauspicious"},{"name":"Chala","start":"00:17","end":"01:40","startHours":24.27775918367117,"endHours":25.659126076664243,"quality":"neutral"},{"name":"Labha","start":"01:40","end":"03:02","startHours":25.659126076664243,"endHours":27.04049296965732,"quality":"auspicious"},{"name":"Amṛta","start":"03:02","end":"04:25","startHours":27.04049296965732,"endHours":28.421859862650393,"quality":"auspicious"},{"name":"Kāla","start":"04:25","end":"05:48","startHours":28.421859862650393,"endHours":29.80322675564347,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:48","end":"06:48","startHours":5.803226755643467,"endHours":6.803226755643467,"planetary_lord":"Mars"},{"name":"Hora 2","start":"06:48","end":"07:48","startHours":6.803226755643467,"endHours":7.803226755643467,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"07:48","end":"08:48","startHours":7.803226755643467,"endHours":8.803226755643468,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"08:48","end":"09:48","startHours":8.803226755643468,"endHours":9.803226755643468,"planetary_lord":"Moon"},{"name":"Hora 5","start":"09:48","end":"10:48","startHours":9.803226755643468,"endHours":10.803226755643468,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"10:48","end":"11:48","startHours":10.803226755643468,"endHours":11.803226755643468,"planetary_lord":"Venus"},{"name":"Hora 7","start":"11:48","end":"12:48","startHours":11.803226755643468,"endHours":12.803226755643468,"planetary_lord":"Sun"},{"name":"Hora 8","start":"12:48","end":"13:48","startHours":12.803226755643468,"endHours":13.803226755643468,"planetary_lord":"Mars"},{"name":"Hora 9","start":"13:48","end":"14:48","startHours":13.803226755643468,"endHours":14.803226755643468,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"14:48","end":"15:48","startHours":14.803226755643468,"endHours":15.803226755643468,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"15:48","end":"16:48","startHours":15.803226755643468,"endHours":16.80322675564347,"planetary_lord":"Moon"},{"name":"Hora 12","start":"16:48","end":"17:48","startHours":16.80322675564347,"endHours":17.80322675564347,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"17:48","end":"18:48","startHours":17.80322675564347,"endHours":18.80322675564347,"planetary_lord":"Venus"},{"name":"Hora 14","start":"18:48","end":"19:48","startHours":18.80322675564347,"endHours":19.80322675564347,"planetary_lord":"Sun"},{"name":"Hora 15","start":"19:48","end":"20:48","startHours":19.80322675564347,"endHours":20.80322675564347,"planetary_lord":"Mars"},{"name":"Hora 16","start":"20:48","end":"21:48","startHours":20.80322675564347,"endHours":21.80322675564347,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"21:48","end":"22:48","startHours":21.80322675564347,"endHours":22.80322675564347,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"22:48","end":"23:48","startHours":22.80322675564347,"endHours":23.80322675564347,"planetary_lord":"Moon"},{"name":"Hora 19","start":"23:48","end":"00:48","startHours":23.80322675564347,"endHours":24.80322675564347,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"00:48","end":"01:48","startHours":24.80322675564347,"endHours":25.80322675564347,"planetary_lord":"Venus"},{"name":"Hora 21","start":"01:48","end":"02:48","startHours":25.80322675564347,"endHours":26.80322675564347,"planetary_lord":"Sun"},{"name":"Hora 22","start":"02:48","end":"03:48","startHours":26.80322675564347,"endHours":27.80322675564347,"planetary_lord":"Mars"},{"name":"Hora 23","start":"03:48","end":"04:48","startHours":27.80322675564347,"endHours":28.80322675564347,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"04:48","end":"05:48","startHours":28.80322675564347,"endHours":29.80322675564347,"planetary_lord":"Saturn"}],"taraBala":{"favorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Citrā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa"],"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":"North (Uttara)","chandraVasa":"South-East","rahuVasa":"North","anandadiYoga":{"name":"Maitra","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":10.44714053410881,"eotMinutes":0.2640489797298191,"ayanamsa":22.1389}},"calendars":{"vikram_samvat":1934,"vikram_samvatsara":"Vikṛti","saka_samvat":1799,"saka_samvatsara":"Īśvara","bengali_samvat":1284,"malayalam_era":1053,"nanakshahi_year":408,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Vaiśākha","lunar_month_amanta":"Vaiśākha","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":"Vaiśākha Śukla Caturthī · Vikram 1934 Vikṛti · Śaka 1799 Īśvara"},"festivals":[{"id":"angarika-chaturthi","name":"Aṅgāraka Caturthī (Tuesday Caturthī)","name_sanskrit":"अङ्गारक चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa + Maṅgala","significance":"Tuesday-Caturthī (rare); supremely auspicious for Maṅgala-doṣa-nivāraṇa.","vrata":true,"detection":{"any_of":[{"tithi_number":4,"vara_name":"Maṅgalavāra (Tuesday)"},{"tithi_number":19,"vara_name":"Maṅgalavāra (Tuesday)"}]},"precedence":3},{"id":"vinayaka-chaturthi","name":"Vināyaka Caturthī (monthly)","name_sanskrit":"विनायक चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Śukla-pakṣa Caturthī; auspicious for new ventures.","vrata":true,"detection":{"tithi_number":4,"tithi_paksha":"Śukla"},"precedence":6}],"todays_walk":{"walk":{"id":"mangala-walk","name":"Maṅgala Walk","name_sanskrit":"मङ्गल यात्रा","type":"graha","description":"Right action + BG 2.31-38 (kṣatriya-dharma).","step_count":7,"url":"/walk/mangala-walk"},"reason":"Maṅgalavāra (Tuesday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3226-07-09","event":"Bhagavān Krishna's birth at Mathurā","chart_id":"krishna","shared_marker":"same Rohiṇī","url":"/day/-3226-07-09","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, 1877 CE · Ṛṣikeśa · Vidhyamitra","description":"April 17, 1877 CE for Ṛṣikeśa: Śukla Caturthī, sūryodaya 05:48, sūryāsta 18:45.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1877-04-17","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1877-04-17","sa":"https://sa.vidhyamitra.com/city/rishikesh/1877-04-17","hi":"https://hi.vidhyamitra.com/city/rishikesh/1877-04-17","x-default":"https://vidhyamitra.com/city/rishikesh/1877-04-17"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T13:52:08.422Z","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":"2026-05-31T13:52:08.422Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T13:52:08.422Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}