{"id":"vidhyamitra:city-day:rishikesh:2173-09-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/2173-09-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2173-09-18","date_display":"September 18, 2173 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":2173,"month":9,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2514992.770833,"kali_year":5275,"ahargana":1926527.2708,"sun":{"sidereal_longitude":148.1494,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":281.1328,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":132.9834,"elapsed_within_tithi_degrees":0.9834},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1,"moon_longitude":281.1328,"elapsed_within_degrees":1.1328},"yoga":{"number":6,"name":"Atigaṇḍa","sum_longitude":69.2822},"karana":{"half_tithi_index":22,"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":2173,"month":9,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2514992.770833,"ahargana":1926527.2708,"kali_year":5275,"ayanamsa_lahiri":26.2796,"grahas":{"sun":{"sidereal_longitude":149.30063900000005,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":279.879739,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false,"latitude":-3.979},"mars":{"sidereal_longitude":119.40563900000001,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":166.09683900000005,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"jupiter":{"sidereal_longitude":224.270939,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":193.11173899999994,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":343.531339,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":343.3141,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":163.3141,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"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":2173,"month":9,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2514992.770833,"kali_year":5275,"ahargana":1926527.2708,"sun":{"sidereal_longitude":148.1494,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":281.1328,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":132.9834,"elapsed_within_tithi_degrees":0.9834},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1,"moon_longitude":281.1328,"elapsed_within_degrees":1.1328},"yoga":{"number":6,"name":"Atigaṇḍa","sum_longitude":69.2822},"karana":{"half_tithi_index":22,"name":"Bava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.979,"elongation":132.983},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.979,"opposition_distance":47.017}},"eclipse_window_40days":[{"offset_days":19,"type":"solar","occurs":true,"moon_latitude":-0.348,"elongation":0.001}]},"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":"06:02","sunsetLocal":"18:18","solarNoonLocal":"12:10","dayLengthHours":12.264195145945047,"dayLengthDisplay":"12 Hours 15 Mins 51 Secs","nightLengthDisplay":"11 Hours 44 Mins 09 Secs","moonriseLocal":"15:35","moonsetLocal":"02:10","rahuKala":{"name":"Rāhu Kāla","start":"09:06","end":"10:38","startHours":9.105944177285831,"endHours":10.638968570528963,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:42","end":"15:14","startHours":13.705017357015224,"endHours":15.238041750258356,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:02","end":"07:34","startHours":6.03989539079957,"endHours":7.572919784042701,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:54","end":"09:19","startHours":8.901540924853414,"endHours":9.310347429718249,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:33","end":"06:53","startHours":6.550903521880613,"endHours":6.877948725772481,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:46","end":"12:35","startHours":11.76318645890726,"endHours":12.580799468636929,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:24","end":"05:13","startHours":4.404669371340231,"endHours":5.2222823810699,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:01","end":"06:02","startHours":5.017879128637483,"endHours":6.03989539079957,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:13","end":"15:02","startHours":14.216025488096268,"endHours":15.033638497825937,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:06","end":"18:30","startHours":18.104090536744618,"endHours":18.504090536744616,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:18","end":"18:49","startHours":18.304090536744617,"endHours":18.815098667825662,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:03","end":"19:48","startHours":18.054090536744617,"endHours":19.804090536744617,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:46","end":"00:35","startHours":23.76318645890726,"endHours":24.58079946863693,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"06:02","end":"07:34","startHours":6.03989539079957,"endHours":7.572919784042701,"quality":"inauspicious"},{"name":"Śubha","start":"07:34","end":"09:06","startHours":7.572919784042701,"endHours":9.105944177285831,"quality":"auspicious"},{"name":"Roga","start":"09:06","end":"10:38","startHours":9.105944177285831,"endHours":10.638968570528963,"quality":"inauspicious"},{"name":"Udveg","start":"10:38","end":"12:10","startHours":10.638968570528963,"endHours":12.171992963772094,"quality":"inauspicious"},{"name":"Chala","start":"12:10","end":"13:42","startHours":12.171992963772094,"endHours":13.705017357015224,"quality":"neutral"},{"name":"Labha","start":"13:42","end":"15:14","startHours":13.705017357015224,"endHours":15.238041750258356,"quality":"auspicious"},{"name":"Amṛta","start":"15:14","end":"16:46","startHours":15.238041750258356,"endHours":16.771066143501486,"quality":"auspicious"},{"name":"Kāla","start":"16:46","end":"18:18","startHours":16.771066143501486,"endHours":18.304090536744617,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:18","end":"19:46","startHours":18.304090536744617,"endHours":19.771066143501486,"quality":"auspicious"},{"name":"Amṛta","start":"19:46","end":"21:14","startHours":19.771066143501486,"endHours":21.238041750258354,"quality":"auspicious"},{"name":"Kāla","start":"21:14","end":"22:42","startHours":21.238041750258354,"endHours":22.705017357015223,"quality":"inauspicious"},{"name":"Śubha","start":"22:42","end":"00:10","startHours":22.705017357015223,"endHours":24.171992963772094,"quality":"auspicious"},{"name":"Roga","start":"00:10","end":"01:38","startHours":24.171992963772094,"endHours":25.638968570528963,"quality":"inauspicious"},{"name":"Udveg","start":"01:38","end":"03:06","startHours":25.638968570528963,"endHours":27.10594417728583,"quality":"inauspicious"},{"name":"Chala","start":"03:06","end":"04:34","startHours":27.10594417728583,"endHours":28.572919784042703,"quality":"neutral"},{"name":"Labha","start":"04:34","end":"06:02","startHours":28.572919784042703,"endHours":30.039895390799572,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:02","end":"07:02","startHours":6.03989539079957,"endHours":7.03989539079957,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"07:02","end":"08:02","startHours":7.03989539079957,"endHours":8.03989539079957,"planetary_lord":"Moon"},{"name":"Hora 3","start":"08:02","end":"09:02","startHours":8.03989539079957,"endHours":9.03989539079957,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"09:02","end":"10:02","startHours":9.03989539079957,"endHours":10.03989539079957,"planetary_lord":"Venus"},{"name":"Hora 5","start":"10:02","end":"11:02","startHours":10.03989539079957,"endHours":11.03989539079957,"planetary_lord":"Sun"},{"name":"Hora 6","start":"11:02","end":"12:02","startHours":11.03989539079957,"endHours":12.03989539079957,"planetary_lord":"Mars"},{"name":"Hora 7","start":"12:02","end":"13:02","startHours":12.03989539079957,"endHours":13.03989539079957,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"13:02","end":"14:02","startHours":13.03989539079957,"endHours":14.03989539079957,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"14:02","end":"15:02","startHours":14.03989539079957,"endHours":15.03989539079957,"planetary_lord":"Moon"},{"name":"Hora 10","start":"15:02","end":"16:02","startHours":15.03989539079957,"endHours":16.039895390799572,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"16:02","end":"17:02","startHours":16.039895390799572,"endHours":17.039895390799572,"planetary_lord":"Venus"},{"name":"Hora 12","start":"17:02","end":"18:02","startHours":17.039895390799572,"endHours":18.039895390799572,"planetary_lord":"Sun"},{"name":"Hora 13","start":"18:02","end":"19:02","startHours":18.039895390799572,"endHours":19.039895390799572,"planetary_lord":"Mars"},{"name":"Hora 14","start":"19:02","end":"20:02","startHours":19.039895390799572,"endHours":20.039895390799572,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"20:02","end":"21:02","startHours":20.039895390799572,"endHours":21.039895390799572,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"21:02","end":"22:02","startHours":21.039895390799572,"endHours":22.039895390799572,"planetary_lord":"Moon"},{"name":"Hora 17","start":"22:02","end":"23:02","startHours":22.039895390799572,"endHours":23.039895390799572,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"23:02","end":"00:02","startHours":23.039895390799572,"endHours":24.039895390799572,"planetary_lord":"Venus"},{"name":"Hora 19","start":"00:02","end":"01:02","startHours":24.039895390799572,"endHours":25.039895390799572,"planetary_lord":"Sun"},{"name":"Hora 20","start":"01:02","end":"02:02","startHours":25.039895390799572,"endHours":26.039895390799572,"planetary_lord":"Mars"},{"name":"Hora 21","start":"02:02","end":"03:02","startHours":26.039895390799572,"endHours":27.039895390799572,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"03:02","end":"04:02","startHours":27.039895390799572,"endHours":28.039895390799572,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"04:02","end":"05:02","startHours":28.039895390799572,"endHours":29.039895390799572,"planetary_lord":"Moon"},{"name":"Hora 24","start":"05:02","end":"06:02","startHours":29.039895390799572,"endHours":30.039895390799572,"planetary_lord":"Mercury"}],"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":["Mithuna","Karka","Tulā","Vṛścika","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Dhanu","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"South-East","rahuVasa":"East","anandadiYoga":{"name":"Kāṇa","quality":"Inauspicious"},"tropicalRitu":"Varṣā (Monsoon) (tropical)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":1.7564146469635455,"eotMinutes":6.610022173674397,"ayanamsa":26.2796}},"calendars":{"vikram_samvat":2230,"vikram_samvatsara":"Vyaya","saka_samvat":2095,"saka_samvatsara":"Śrīmukha","bengali_samvat":1580,"malayalam_era":1349,"nanakshahi_year":704,"lunar_month":"Bhādrapada","lunar_month_paksha_full":"Bhādrapada Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Bhādrapada","lunar_month_amanta":"Bhādrapada","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Siṃha (Āvaṇi)","ritu":"Varṣā (Monsoon)","display_summary":"Bhādrapada Śukla Dvādaśī · Vikram 2230 Vyaya · Śaka 2095 Śrīmukha"},"festivals":[{"id":"vamana-jayanti","name":"Vāmana Jayantī","name_sanskrit":"वामन जयन्ती","tradition":"Vaishnava","associated_deity":"Vāmana (5th daśāvatāra of Krishna)","deity_avatara_index":15,"significance":"Vāmana's three-step measure of all worlds; Bali's surrender. (= Onam in Kerala.)","vrata":true,"detection":{"tithi_number":12,"tithi_paksha":"Śukla","lunar_month":"Bhādrapada"},"precedence":2,"sources":["Bhāgavata 8.18-22"]},{"id":"onam","name":"Onam (Vāmana / King Bali)","name_sanskrit":"ओणम् (वामन-बलि स्मरण)","tradition":"Regional","associated_deity":"Vāmana + King Bali","significance":"Kerala festival; King Bali's annual return to Kerala. Aligned with Thiru-Onam (Śravaṇa nakshatra in Bhādrapada).","vrata":false,"detection":{"nakshatra_name":"Śravaṇa","lunar_month":"Bhādrapada"},"precedence":2}],"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 September 18, 2173 CE · Ṛṣikeśa · Vidhyamitra","description":"September 18, 2173 CE for Ṛṣikeśa: Śukla Dvādaśī, sūryodaya 06:02, sūryāsta 18:18.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/2173-09-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/2173-09-18","sa":"https://sa.vidhyamitra.com/city/rishikesh/2173-09-18","hi":"https://hi.vidhyamitra.com/city/rishikesh/2173-09-18","x-default":"https://vidhyamitra.com/city/rishikesh/2173-09-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T03:22:41.454Z","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":"2026-05-31T03:22:41.454Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T03:22:41.454Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}