{"id":"vidhyamitra:city-day:rishikesh:1866-08-11:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1866-08-11","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1866-08-11","date_display":"August 11, 1866 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":1866,"month":8,"day":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2402824.770833,"kali_year":4968,"ahargana":1814359.2708,"sun":{"sidereal_longitude":115.8278,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":123.0036,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":1,"name":"Pratipada","paksha":"Śukla","full_name":"Śukla Pratipada","elongation_degrees":7.1758,"elapsed_within_tithi_degrees":7.1758},"nakshatra":{"number":10,"name":"Maghā","pada":1,"moon_longitude":123.0036,"elapsed_within_degrees":3.0036},"yoga":{"number":18,"name":"Varīyān","sum_longitude":238.8314},"karana":{"half_tithi_index":1,"name":"Bava"},"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":1866,"month":8,"day":11,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2402824.770833,"ahargana":1814359.2708,"kali_year":4968,"ayanamsa_lahiri":21.9896,"grahas":{"sun":{"sidereal_longitude":116.10768100000001,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":121.49438099999998,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false,"latitude":-3.0965},"mars":{"sidereal_longitude":51.35558100000003,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":134.855881,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":true},"jupiter":{"sidereal_longitude":274.987381,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":true},"venus":{"sidereal_longitude":158.62898100000007,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":195.47368099999994,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":166.5145,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":346.5145,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","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":1866,"month":8,"day":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2402824.770833,"kali_year":4968,"ahargana":1814359.2708,"sun":{"sidereal_longitude":115.8278,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":123.0036,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":1,"name":"Pratipada","paksha":"Śukla","full_name":"Śukla Pratipada","elongation_degrees":7.1758,"elapsed_within_tithi_degrees":7.1758},"nakshatra":{"number":10,"name":"Maghā","pada":1,"moon_longitude":123.0036,"elapsed_within_degrees":3.0036},"yoga":{"number":18,"name":"Varīyān","sum_longitude":238.8314},"karana":{"half_tithi_index":1,"name":"Bava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.097,"elongation":7.176},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.097,"opposition_distance":172.824}},"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":"05:41","sunsetLocal":"19:03","solarNoonLocal":"12:22","dayLengthHours":13.35983731268773,"dayLengthDisplay":"13 Hours 21 Mins 35 Secs","nightLengthDisplay":"10 Hours 38 Mins 25 Secs","moonriseLocal":"06:08","moonsetLocal":"19:19","rahuKala":{"name":"Rāhu Kāla","start":"09:01","end":"10:42","startHours":9.02398230069253,"endHours":10.693961964778499,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"14:02","end":"15:42","startHours":14.033921292950431,"endHours":15.703900957036396,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"05:41","end":"07:21","startHours":5.684022972520599,"endHours":7.354002636606565,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:48","end":"09:15","startHours":8.80131834548107,"endHours":9.246646255903993,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:14","end":"06:36","startHours":6.240682860549255,"endHours":6.596945188887594,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:55","end":"12:49","startHours":11.91861371844154,"endHours":12.809269539287387,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:54","end":"04:48","startHours":3.902711330828901,"endHours":4.79336715167475,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:34","end":"05:41","startHours":4.570703196463288,"endHours":5.684022972520599,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:35","end":"15:29","startHours":14.590581180979086,"endHours":15.481237001824935,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:51","end":"19:15","startHours":18.84386028520833,"endHours":19.243860285208328,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:03","end":"19:36","startHours":19.04386028520833,"endHours":19.600520173236983,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:48","end":"20:33","startHours":18.79386028520833,"endHours":20.54386028520833,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:55","end":"00:49","startHours":23.918613718441538,"endHours":24.80926953928739,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"05:41","end":"07:21","startHours":5.684022972520599,"endHours":7.354002636606565,"quality":"inauspicious"},{"name":"Śubha","start":"07:21","end":"09:01","startHours":7.354002636606565,"endHours":9.02398230069253,"quality":"auspicious"},{"name":"Roga","start":"09:01","end":"10:42","startHours":9.02398230069253,"endHours":10.693961964778499,"quality":"inauspicious"},{"name":"Udveg","start":"10:42","end":"12:22","startHours":10.693961964778499,"endHours":12.363941628864463,"quality":"inauspicious"},{"name":"Chala","start":"12:22","end":"14:02","startHours":12.363941628864463,"endHours":14.033921292950431,"quality":"neutral"},{"name":"Labha","start":"14:02","end":"15:42","startHours":14.033921292950431,"endHours":15.703900957036396,"quality":"auspicious"},{"name":"Amṛta","start":"15:42","end":"17:22","startHours":15.703900957036396,"endHours":17.373880621122364,"quality":"auspicious"},{"name":"Kāla","start":"17:22","end":"19:03","startHours":17.373880621122364,"endHours":19.04386028520833,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"19:03","end":"20:22","startHours":19.04386028520833,"endHours":20.37388062112236,"quality":"auspicious"},{"name":"Amṛta","start":"20:22","end":"21:42","startHours":20.37388062112236,"endHours":21.703900957036396,"quality":"auspicious"},{"name":"Kāla","start":"21:42","end":"23:02","startHours":21.703900957036396,"endHours":23.03392129295043,"quality":"inauspicious"},{"name":"Śubha","start":"23:02","end":"00:22","startHours":23.03392129295043,"endHours":24.363941628864463,"quality":"auspicious"},{"name":"Roga","start":"00:22","end":"01:42","startHours":24.363941628864463,"endHours":25.693961964778495,"quality":"inauspicious"},{"name":"Udveg","start":"01:42","end":"03:01","startHours":25.693961964778495,"endHours":27.02398230069253,"quality":"inauspicious"},{"name":"Chala","start":"03:01","end":"04:21","startHours":27.02398230069253,"endHours":28.354002636606566,"quality":"neutral"},{"name":"Labha","start":"04:21","end":"05:41","startHours":28.354002636606566,"endHours":29.684022972520598,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:41","end":"06:41","startHours":5.684022972520599,"endHours":6.684022972520599,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"06:41","end":"07:41","startHours":6.684022972520599,"endHours":7.684022972520599,"planetary_lord":"Moon"},{"name":"Hora 3","start":"07:41","end":"08:41","startHours":7.684022972520599,"endHours":8.684022972520598,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"08:41","end":"09:41","startHours":8.684022972520598,"endHours":9.684022972520598,"planetary_lord":"Venus"},{"name":"Hora 5","start":"09:41","end":"10:41","startHours":9.684022972520598,"endHours":10.684022972520598,"planetary_lord":"Sun"},{"name":"Hora 6","start":"10:41","end":"11:41","startHours":10.684022972520598,"endHours":11.684022972520598,"planetary_lord":"Mars"},{"name":"Hora 7","start":"11:41","end":"12:41","startHours":11.684022972520598,"endHours":12.684022972520598,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"12:41","end":"13:41","startHours":12.684022972520598,"endHours":13.684022972520598,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"13:41","end":"14:41","startHours":13.684022972520598,"endHours":14.684022972520598,"planetary_lord":"Moon"},{"name":"Hora 10","start":"14:41","end":"15:41","startHours":14.684022972520598,"endHours":15.684022972520598,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"15:41","end":"16:41","startHours":15.684022972520598,"endHours":16.684022972520598,"planetary_lord":"Venus"},{"name":"Hora 12","start":"16:41","end":"17:41","startHours":16.684022972520598,"endHours":17.684022972520598,"planetary_lord":"Sun"},{"name":"Hora 13","start":"17:41","end":"18:41","startHours":17.684022972520598,"endHours":18.684022972520598,"planetary_lord":"Mars"},{"name":"Hora 14","start":"18:41","end":"19:41","startHours":18.684022972520598,"endHours":19.684022972520598,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"19:41","end":"20:41","startHours":19.684022972520598,"endHours":20.684022972520598,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"20:41","end":"21:41","startHours":20.684022972520598,"endHours":21.684022972520598,"planetary_lord":"Moon"},{"name":"Hora 17","start":"21:41","end":"22:41","startHours":21.684022972520598,"endHours":22.684022972520598,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"22:41","end":"23:41","startHours":22.684022972520598,"endHours":23.684022972520598,"planetary_lord":"Venus"},{"name":"Hora 19","start":"23:41","end":"00:41","startHours":23.684022972520598,"endHours":24.684022972520598,"planetary_lord":"Sun"},{"name":"Hora 20","start":"00:41","end":"01:41","startHours":24.684022972520598,"endHours":25.684022972520598,"planetary_lord":"Mars"},{"name":"Hora 21","start":"01:41","end":"02:41","startHours":25.684022972520598,"endHours":26.684022972520598,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"02:41","end":"03:41","startHours":26.684022972520598,"endHours":27.684022972520598,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"03:41","end":"04:41","startHours":27.684022972520598,"endHours":28.684022972520598,"planetary_lord":"Moon"},{"name":"Hora 24","start":"04:41","end":"05:41","startHours":28.684022972520598,"endHours":29.684022972520598,"planetary_lord":"Mercury"}],"taraBala":{"favorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Svātī","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"unfavorable_nakshatras":["Aśvinī","Punarvasu","Puṣya","Aśleṣā","Maghā","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Mithuna","Siṃha","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Kanyā","Vṛścika","Dhanu","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"West","rahuVasa":"East","anandadiYoga":{"name":"Dhvānkṣa","quality":"Inauspicious"},"tropicalRitu":"Varṣā (Monsoon) (tropical)","vedicRitu":"Grīṣma (Summer)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":15.404553349305404,"eotMinutes":-4.906897731867799,"ayanamsa":21.9896}},"calendars":{"vikram_samvat":1923,"vikram_samvatsara":"Pramāthi","saka_samvat":1788,"saka_samvatsara":"Akṣaya","bengali_samvat":1273,"malayalam_era":1042,"nanakshahi_year":397,"lunar_month":"Śrāvaṇa","lunar_month_paksha_full":"Śrāvaṇa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Śrāvaṇa","lunar_month_amanta":"Śrāvaṇa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Karkaṭa (Āḍi)","ritu":"Varṣā (Monsoon)","display_summary":"Śrāvaṇa Śukla Pratipada · Vikram 1923 Pramāthi · Śaka 1788 Akṣaya"},"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":[]},"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 August 11, 1866 CE · Ṛṣikeśa · Vidhyamitra","description":"August 11, 1866 CE for Ṛṣikeśa: Śukla Pratipada, sūryodaya 05:41, sūryāsta 19:03.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1866-08-11","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1866-08-11","sa":"https://sa.vidhyamitra.com/city/rishikesh/1866-08-11","hi":"https://hi.vidhyamitra.com/city/rishikesh/1866-08-11","x-default":"https://vidhyamitra.com/city/rishikesh/1866-08-11"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T11:14:10.132Z","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":"2026-05-31T11:14:10.132Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T11:14:10.132Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}