{"id":"vidhyamitra:city-day:rishikesh:2105-12-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/2105-12-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2105-12-18","date_display":"December 18, 2105 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":2105,"month":12,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2490246.770833,"kali_year":5207,"ahargana":1901781.2708,"sun":{"sidereal_longitude":239.9751,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":16.5953,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":136.6202,"elapsed_within_tithi_degrees":4.6202},"nakshatra":{"number":2,"name":"Bharaṇī","pada":1,"moon_longitude":16.5953,"elapsed_within_degrees":3.2619},"yoga":{"number":20,"name":"Śiva","sum_longitude":256.5703},"karana":{"half_tithi_index":22,"name":"Bava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"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":2105,"month":12,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2490246.770833,"ahargana":1901781.2708,"kali_year":5207,"ayanamsa_lahiri":25.3332,"grahas":{"sun":{"sidereal_longitude":240.60161799999992,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"moon":{"sidereal_longitude":14.721617999999978,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":1},"retrograde":false,"latitude":1.3804},"mars":{"sidereal_longitude":132.483518,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":231.38741800000003,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":333.35871799999995,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":240.37911800000006,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":240.77311800000007,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":214.4763,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":34.4763,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","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":2105,"month":12,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2490246.770833,"kali_year":5207,"ahargana":1901781.2708,"sun":{"sidereal_longitude":239.9751,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":16.5953,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":136.6202,"elapsed_within_tithi_degrees":4.6202},"nakshatra":{"number":2,"name":"Bharaṇī","pada":1,"moon_longitude":16.5953,"elapsed_within_degrees":3.2619},"yoga":{"number":20,"name":"Śiva","sum_longitude":256.5703},"karana":{"half_tithi_index":22,"name":"Bava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.38,"elongation":136.62},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.38,"opposition_distance":43.38}},"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":"07:08","sunsetLocal":"17:20","solarNoonLocal":"12:14","dayLengthHours":10.21055338220545,"dayLengthDisplay":"10 Hours 12 Mins 38 Secs","nightLengthDisplay":"13 Hours 47 Mins 22 Secs","moonriseLocal":"14:33","moonsetLocal":"03:49","rahuKala":{"name":"Rāhu Kāla","start":"10:58","end":"12:14","startHours":10.959378704755299,"endHours":12.235697877530981,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"14:47","end":"16:04","startHours":14.788336223082343,"endHours":16.064655395858026,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"08:24","end":"09:41","startHours":8.406740359203937,"endHours":9.683059531979618,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:31","end":"09:51","startHours":9.512883642276194,"endHours":9.853235421683042,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:33","end":"07:50","startHours":7.555860910686816,"endHours":7.828142334212295,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:54","end":"12:35","startHours":11.895346098124131,"endHours":12.576049656937828,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:46","end":"06:27","startHours":5.769014068800862,"endHours":6.449717627614558,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:17","end":"07:08","startHours":6.279541737911134,"endHours":7.130421186428255,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:56","end":"14:37","startHours":13.937456774565224,"endHours":14.61816033337892,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:08","end":"17:32","startHours":17.140974568633705,"endHours":17.540974568633704,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:20","end":"17:46","startHours":17.340974568633705,"endHours":17.766414292892264,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:05","end":"18:50","startHours":17.090974568633705,"endHours":18.840974568633705,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:54","end":"00:35","startHours":23.895346098124133,"endHours":24.57604965693783,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"07:08","end":"08:24","startHours":7.130421186428255,"endHours":8.406740359203937,"quality":"neutral"},{"name":"Labha","start":"08:24","end":"09:41","startHours":8.406740359203937,"endHours":9.683059531979618,"quality":"auspicious"},{"name":"Amṛta","start":"09:41","end":"10:58","startHours":9.683059531979618,"endHours":10.959378704755299,"quality":"auspicious"},{"name":"Kāla","start":"10:58","end":"12:14","startHours":10.959378704755299,"endHours":12.235697877530981,"quality":"inauspicious"},{"name":"Śubha","start":"12:14","end":"13:31","startHours":12.235697877530981,"endHours":13.51201705030666,"quality":"auspicious"},{"name":"Roga","start":"13:31","end":"14:47","startHours":13.51201705030666,"endHours":14.788336223082343,"quality":"inauspicious"},{"name":"Udveg","start":"14:47","end":"16:04","startHours":14.788336223082343,"endHours":16.064655395858026,"quality":"inauspicious"},{"name":"Chala","start":"16:04","end":"17:20","startHours":16.064655395858026,"endHours":17.340974568633705,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"17:20","end":"19:04","startHours":17.340974568633705,"endHours":19.064655395858022,"quality":"inauspicious"},{"name":"Udveg","start":"19:04","end":"20:47","startHours":19.064655395858022,"endHours":20.788336223082343,"quality":"inauspicious"},{"name":"Chala","start":"20:47","end":"22:31","startHours":20.788336223082343,"endHours":22.51201705030666,"quality":"neutral"},{"name":"Labha","start":"22:31","end":"00:14","startHours":22.51201705030666,"endHours":24.23569787753098,"quality":"auspicious"},{"name":"Amṛta","start":"00:14","end":"01:58","startHours":24.23569787753098,"endHours":25.9593787047553,"quality":"auspicious"},{"name":"Kāla","start":"01:58","end":"03:41","startHours":25.9593787047553,"endHours":27.683059531979616,"quality":"inauspicious"},{"name":"Śubha","start":"03:41","end":"05:24","startHours":27.683059531979616,"endHours":29.406740359203937,"quality":"auspicious"},{"name":"Roga","start":"05:24","end":"07:08","startHours":29.406740359203937,"endHours":31.130421186428254,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:08","end":"08:08","startHours":7.130421186428255,"endHours":8.130421186428254,"planetary_lord":"Venus"},{"name":"Hora 2","start":"08:08","end":"09:08","startHours":8.130421186428254,"endHours":9.130421186428254,"planetary_lord":"Sun"},{"name":"Hora 3","start":"09:08","end":"10:08","startHours":9.130421186428254,"endHours":10.130421186428254,"planetary_lord":"Mars"},{"name":"Hora 4","start":"10:08","end":"11:08","startHours":10.130421186428254,"endHours":11.130421186428254,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"11:08","end":"12:08","startHours":11.130421186428254,"endHours":12.130421186428254,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"12:08","end":"13:08","startHours":12.130421186428254,"endHours":13.130421186428254,"planetary_lord":"Moon"},{"name":"Hora 7","start":"13:08","end":"14:08","startHours":13.130421186428254,"endHours":14.130421186428254,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"14:08","end":"15:08","startHours":14.130421186428254,"endHours":15.130421186428254,"planetary_lord":"Venus"},{"name":"Hora 9","start":"15:08","end":"16:08","startHours":15.130421186428254,"endHours":16.130421186428254,"planetary_lord":"Sun"},{"name":"Hora 10","start":"16:08","end":"17:08","startHours":16.130421186428254,"endHours":17.130421186428254,"planetary_lord":"Mars"},{"name":"Hora 11","start":"17:08","end":"18:08","startHours":17.130421186428254,"endHours":18.130421186428254,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"18:08","end":"19:08","startHours":18.130421186428254,"endHours":19.130421186428254,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"19:08","end":"20:08","startHours":19.130421186428254,"endHours":20.130421186428254,"planetary_lord":"Moon"},{"name":"Hora 14","start":"20:08","end":"21:08","startHours":20.130421186428254,"endHours":21.130421186428254,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"21:08","end":"22:08","startHours":21.130421186428254,"endHours":22.130421186428254,"planetary_lord":"Venus"},{"name":"Hora 16","start":"22:08","end":"23:08","startHours":22.130421186428254,"endHours":23.130421186428254,"planetary_lord":"Sun"},{"name":"Hora 17","start":"23:08","end":"00:08","startHours":23.130421186428254,"endHours":24.130421186428254,"planetary_lord":"Mars"},{"name":"Hora 18","start":"00:08","end":"01:08","startHours":24.130421186428254,"endHours":25.130421186428254,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"01:08","end":"02:08","startHours":25.130421186428254,"endHours":26.130421186428254,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"02:08","end":"03:08","startHours":26.130421186428254,"endHours":27.130421186428254,"planetary_lord":"Moon"},{"name":"Hora 21","start":"03:08","end":"04:08","startHours":27.130421186428254,"endHours":28.130421186428254,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"04:08","end":"05:08","startHours":28.130421186428254,"endHours":29.130421186428254,"planetary_lord":"Venus"},{"name":"Hora 23","start":"05:08","end":"06:08","startHours":29.130421186428254,"endHours":30.130421186428254,"planetary_lord":"Sun"},{"name":"Hora 24","start":"06:08","end":"07:08","startHours":30.130421186428254,"endHours":31.130421186428254,"planetary_lord":"Mars"}],"taraBala":{"favorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Uttara Phalgunī","Hasta","Citrā","Svātī","Viśākhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Mithuna","Kanyā","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Karka","Siṃha","Vṛścika","Dhanu","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"East","rahuVasa":"South-East","anandadiYoga":{"name":"Mausala","quality":"Inauspicious"},"tropicalRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-23.37402490782632,"eotMinutes":2.787727348141232,"ayanamsa":25.3332}},"calendars":{"vikram_samvat":2162,"vikram_samvatsara":"Bahudhānya","saka_samvat":2027,"saka_samvatsara":"Krodhana","bengali_samvat":1512,"malayalam_era":1281,"nanakshahi_year":636,"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":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Mārgaśīrṣa Śukla Dvādaśī · Vikram 2162 Bahudhānya · Śaka 2027 Krodhana"},"festivals":[{"id":"dhanu-sankranti","name":"Dhanu Saṅkrānti","name_sanskrit":"धनु सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Sagittarius; Dhanu-māsa (Khara-māsa).","vrata":false,"detection":{"sun_rashi_ingress":"Dhanu"},"precedence":5}],"todays_walk":{"walk":{"id":"shukra-walk","name":"Śukra Walk","name_sanskrit":"शुक्र यात्रा","type":"graha","description":"Beauty + creativity in dharma + BG 10.36.","step_count":5,"url":"/walk/shukra-walk"},"reason":"Śukravāra (Friday) — 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 18, 2105 CE · Ṛṣikeśa · Vidhyamitra","description":"December 18, 2105 CE for Ṛṣikeśa: Śukla Dvādaśī, sūryodaya 07:08, sūryāsta 17:20.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/2105-12-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/2105-12-18","sa":"https://sa.vidhyamitra.com/city/rishikesh/2105-12-18","hi":"https://hi.vidhyamitra.com/city/rishikesh/2105-12-18","x-default":"https://vidhyamitra.com/city/rishikesh/2105-12-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T16:17:43.691Z","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":"2026-05-31T16:17:43.691Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T16:17:43.691Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}