{"id":"vidhyamitra:city-day:rishikesh:1866-12-10:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1866-12-10","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1866-12-10","date_display":"December 10, 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":12,"day":10,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2402945.770833,"kali_year":4968,"ahargana":1814480.2708,"sun":{"sidereal_longitude":235.7112,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":269.1223,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":3,"name":"Tṛtīyā","paksha":"Śukla","full_name":"Śukla Tṛtīyā","elongation_degrees":33.4111,"elapsed_within_tithi_degrees":9.4111},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1,"moon_longitude":269.1223,"elapsed_within_degrees":2.4556},"yoga":{"number":11,"name":"Vṛddhi","sum_longitude":144.8334},"karana":{"half_tithi_index":5,"name":"Gara"},"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":1866,"month":12,"day":10,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2402945.770833,"ahargana":1814480.2708,"kali_year":4968,"ayanamsa_lahiri":21.9943,"grahas":{"sun":{"sidereal_longitude":235.808758,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":266.65775800000006,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false,"latitude":4.2539},"mars":{"sidereal_longitude":99.70015799999999,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":2},"retrograde":true},"mercury":{"sidereal_longitude":232.23705799999993,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2},"retrograde":true},"jupiter":{"sidereal_longitude":282.2164580000001,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":false},"venus":{"sidereal_longitude":240.313358,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":true},"saturn":{"sidereal_longitude":207.740458,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":160.1034,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":340.1034,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","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":1866,"month":12,"day":10,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2402945.770833,"kali_year":4968,"ahargana":1814480.2708,"sun":{"sidereal_longitude":235.7112,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":269.1223,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":3,"name":"Tṛtīyā","paksha":"Śukla","full_name":"Śukla Tṛtīyā","elongation_degrees":33.4111,"elapsed_within_tithi_degrees":9.4111},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1,"moon_longitude":269.1223,"elapsed_within_degrees":2.4556},"yoga":{"number":11,"name":"Vṛddhi","sum_longitude":144.8334},"karana":{"half_tithi_index":5,"name":"Gara"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.254,"elongation":33.411},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.254,"opposition_distance":146.589}},"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":"07:03","sunsetLocal":"17:18","solarNoonLocal":"12:10","dayLengthHours":10.256659393224925,"dayLengthDisplay":"10 Hours 15 Mins 24 Secs","nightLengthDisplay":"13 Hours 44 Mins 36 Secs","moonriseLocal":"09:05","moonsetLocal":"19:22","rahuKala":{"name":"Rāhu Kāla","start":"08:20","end":"09:37","startHours":8.328745861903068,"endHours":9.610828286056183,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:54","end":"12:10","startHours":10.892910710209298,"endHours":12.174993134362413,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:27","end":"14:44","startHours":13.45707555851553,"endHours":14.739157982668646,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:26","end":"09:47","startHours":9.439883962835768,"endHours":9.781772609276597,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:28","end":"07:45","startHours":7.47402424580099,"endHours":7.747535162953655,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:50","end":"12:31","startHours":11.833104487921585,"endHours":12.516881780803246,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:41","end":"06:22","startHours":5.679108851986628,"endHours":6.362886144868289,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:12","end":"07:03","startHours":6.191941821647874,"endHours":7.0466634377499515,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:53","end":"14:34","startHours":13.884436366566568,"endHours":14.56821365944823,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:06","end":"17:30","startHours":17.10332283097488,"endHours":17.503322830974877,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:18","end":"17:44","startHours":17.303322830974878,"endHours":17.730683639025916,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:03","end":"18:48","startHours":17.053322830974878,"endHours":18.803322830974878,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:50","end":"00:31","startHours":23.833104487921585,"endHours":24.51688178080325,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"07:03","end":"08:20","startHours":7.0466634377499515,"endHours":8.328745861903068,"quality":"auspicious"},{"name":"Kāla","start":"08:20","end":"09:37","startHours":8.328745861903068,"endHours":9.610828286056183,"quality":"inauspicious"},{"name":"Śubha","start":"09:37","end":"10:54","startHours":9.610828286056183,"endHours":10.892910710209298,"quality":"auspicious"},{"name":"Roga","start":"10:54","end":"12:10","startHours":10.892910710209298,"endHours":12.174993134362413,"quality":"inauspicious"},{"name":"Udveg","start":"12:10","end":"13:27","startHours":12.174993134362413,"endHours":13.45707555851553,"quality":"inauspicious"},{"name":"Chala","start":"13:27","end":"14:44","startHours":13.45707555851553,"endHours":14.739157982668646,"quality":"neutral"},{"name":"Labha","start":"14:44","end":"16:01","startHours":14.739157982668646,"endHours":16.02124040682176,"quality":"auspicious"},{"name":"Amṛta","start":"16:01","end":"17:18","startHours":16.02124040682176,"endHours":17.303322830974878,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"17:18","end":"19:01","startHours":17.303322830974878,"endHours":19.02124040682176,"quality":"neutral"},{"name":"Labha","start":"19:01","end":"20:44","startHours":19.02124040682176,"endHours":20.739157982668647,"quality":"auspicious"},{"name":"Amṛta","start":"20:44","end":"22:27","startHours":20.739157982668647,"endHours":22.45707555851553,"quality":"auspicious"},{"name":"Kāla","start":"22:27","end":"00:10","startHours":22.45707555851553,"endHours":24.174993134362417,"quality":"inauspicious"},{"name":"Śubha","start":"00:10","end":"01:54","startHours":24.174993134362417,"endHours":25.8929107102093,"quality":"auspicious"},{"name":"Roga","start":"01:54","end":"03:37","startHours":25.8929107102093,"endHours":27.610828286056183,"quality":"inauspicious"},{"name":"Udveg","start":"03:37","end":"05:20","startHours":27.610828286056183,"endHours":29.328745861903066,"quality":"inauspicious"},{"name":"Chala","start":"05:20","end":"07:03","startHours":29.328745861903066,"endHours":31.046663437749952,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"07:03","end":"08:03","startHours":7.0466634377499515,"endHours":8.046663437749952,"planetary_lord":"Moon"},{"name":"Hora 2","start":"08:03","end":"09:03","startHours":8.046663437749952,"endHours":9.046663437749952,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"09:03","end":"10:03","startHours":9.046663437749952,"endHours":10.046663437749952,"planetary_lord":"Venus"},{"name":"Hora 4","start":"10:03","end":"11:03","startHours":10.046663437749952,"endHours":11.046663437749952,"planetary_lord":"Sun"},{"name":"Hora 5","start":"11:03","end":"12:03","startHours":11.046663437749952,"endHours":12.046663437749952,"planetary_lord":"Mars"},{"name":"Hora 6","start":"12:03","end":"13:03","startHours":12.046663437749952,"endHours":13.046663437749952,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"13:03","end":"14:03","startHours":13.046663437749952,"endHours":14.046663437749952,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"14:03","end":"15:03","startHours":14.046663437749952,"endHours":15.046663437749952,"planetary_lord":"Moon"},{"name":"Hora 9","start":"15:03","end":"16:03","startHours":15.046663437749952,"endHours":16.046663437749952,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"16:03","end":"17:03","startHours":16.046663437749952,"endHours":17.046663437749952,"planetary_lord":"Venus"},{"name":"Hora 11","start":"17:03","end":"18:03","startHours":17.046663437749952,"endHours":18.046663437749952,"planetary_lord":"Sun"},{"name":"Hora 12","start":"18:03","end":"19:03","startHours":18.046663437749952,"endHours":19.046663437749952,"planetary_lord":"Mars"},{"name":"Hora 13","start":"19:03","end":"20:03","startHours":19.046663437749952,"endHours":20.046663437749952,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"20:03","end":"21:03","startHours":20.046663437749952,"endHours":21.046663437749952,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"21:03","end":"22:03","startHours":21.046663437749952,"endHours":22.046663437749952,"planetary_lord":"Moon"},{"name":"Hora 16","start":"22:03","end":"23:03","startHours":22.046663437749952,"endHours":23.046663437749952,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"23:03","end":"00:03","startHours":23.046663437749952,"endHours":24.046663437749952,"planetary_lord":"Venus"},{"name":"Hora 18","start":"00:03","end":"01:03","startHours":24.046663437749952,"endHours":25.046663437749952,"planetary_lord":"Sun"},{"name":"Hora 19","start":"01:03","end":"02:03","startHours":25.046663437749952,"endHours":26.046663437749952,"planetary_lord":"Mars"},{"name":"Hora 20","start":"02:03","end":"03:03","startHours":26.046663437749952,"endHours":27.046663437749952,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"03:03","end":"04:03","startHours":27.046663437749952,"endHours":28.046663437749952,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"04:03","end":"05:03","startHours":28.046663437749952,"endHours":29.046663437749952,"planetary_lord":"Moon"},{"name":"Hora 23","start":"05:03","end":"06:03","startHours":29.046663437749952,"endHours":30.046663437749952,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"06:03","end":"07:03","startHours":30.046663437749952,"endHours":31.046663437749952,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Hasta","Citrā","Svātī","Viśākhā","Anurādhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Tulā","Dhanu","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Makara","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"East","rahuVasa":"North-East","anandadiYoga":{"name":"Rākṣasa","quality":"Inauspicious"},"tropicalRitu":"Hemanta (Pre-winter) (tropical)","vedicRitu":"Śarad (Autumn)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-22.877023840014438,"eotMinutes":6.4300119382551255,"ayanamsa":21.9943}},"calendars":{"vikram_samvat":1923,"vikram_samvatsara":"Pramāthi","saka_samvat":1788,"saka_samvatsara":"Akṣaya","bengali_samvat":1273,"malayalam_era":1042,"nanakshahi_year":397,"lunar_month":"Mārgaśīrṣa","lunar_month_paksha_full":"Mārgaśīrṣa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Mārgaśīrṣa","lunar_month_amanta":"Mārgaśīrṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Vṛścika (Kārttikai)","ritu":"Hemanta (Pre-winter)","display_summary":"Mārgaśīrṣa Śukla Tṛtīyā · Vikram 1923 Pramāthi · Śaka 1788 Akṣaya"},"festivals":[],"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":[]},"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 December 10, 1866 CE · Ṛṣikeśa · Vidhyamitra","description":"December 10, 1866 CE for Ṛṣikeśa: Śukla Tṛtīyā, sūryodaya 07:03, sūryāsta 17:18.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1866-12-10","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1866-12-10","sa":"https://sa.vidhyamitra.com/city/rishikesh/1866-12-10","hi":"https://hi.vidhyamitra.com/city/rishikesh/1866-12-10","x-default":"https://vidhyamitra.com/city/rishikesh/1866-12-10"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T02:27:45.922Z","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":"2026-06-01T02:27:45.922Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T02:27:45.922Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}