{"id":"vidhyamitra:city-day:rishikesh:2131-09-11:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/2131-09-11","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2131-09-11","date_display":"September 11, 2131 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":2131,"month":9,"day":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2499644.770833,"kali_year":5233,"ahargana":1911179.2708,"sun":{"sidereal_longitude":141.2285,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":9.1928,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":227.9643,"elapsed_within_tithi_degrees":11.9643},"nakshatra":{"number":1,"name":"Aśvinī","pada":3,"moon_longitude":9.1928,"elapsed_within_degrees":9.1928},"yoga":{"number":12,"name":"Dhruva","sum_longitude":150.4212},"karana":{"half_tithi_index":37,"name":"Bālava"},"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":2131,"month":9,"day":11,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2499644.770833,"ahargana":1911179.2708,"kali_year":5233,"ayanamsa_lahiri":25.6926,"grahas":{"sun":{"sidereal_longitude":142.25904500000001,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false},"moon":{"sidereal_longitude":12.986544999999978,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":4},"retrograde":false,"latitude":-4.1518},"mars":{"sidereal_longitude":17.933145000000025,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2},"retrograde":true},"mercury":{"sidereal_longitude":148.440745,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":61.190045,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":3},"retrograde":false},"venus":{"sidereal_longitude":156.32414500000004,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":194.88084500000002,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":76.525,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":256.525,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","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":2131,"month":9,"day":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2499644.770833,"kali_year":5233,"ahargana":1911179.2708,"sun":{"sidereal_longitude":141.2285,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":9.1928,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":227.9643,"elapsed_within_tithi_degrees":11.9643},"nakshatra":{"number":1,"name":"Aśvinī","pada":3,"moon_longitude":9.1928,"elapsed_within_degrees":9.1928},"yoga":{"number":12,"name":"Dhruva","sum_longitude":150.4212},"karana":{"half_tithi_index":37,"name":"Bālava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.152,"elongation":132.036},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.152,"opposition_distance":47.964}},"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":"05:58","sunsetLocal":"18:28","solarNoonLocal":"12:13","dayLengthHours":12.49788784604879,"dayLengthDisplay":"12 Hours 29 Mins 52 Secs","nightLengthDisplay":"11 Hours 30 Mins 08 Secs","moonriseLocal":"20:59","moonsetLocal":"10:13","rahuKala":{"name":"Rāhu Kāla","start":"15:20","end":"16:54","startHours":15.339725425606154,"endHours":16.90196140636225,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:05","end":"10:39","startHours":9.090781502581759,"endHours":10.653017483337857,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:13","end":"13:47","startHours":12.215253464093955,"endHours":13.777489444850055,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:53","end":"09:18","startHours":8.882483371814278,"endHours":9.299079633349239,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:29","end":"06:49","startHours":6.4870548679882605,"endHours":6.820331877216228,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:48","end":"12:38","startHours":11.798657202558996,"endHours":12.631849725628914,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:18","end":"05:08","startHours":4.299924494929722,"endHours":5.133117017999641,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:55","end":"05:58","startHours":4.924818887232162,"endHours":5.966309541069561,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:18","end":"15:08","startHours":14.298234771768755,"endHours":15.131427294838675,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:16","end":"18:40","startHours":18.26419738711835,"endHours":18.66419738711835,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:28","end":"18:59","startHours":18.46419738711835,"endHours":18.98494271403705,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:13","end":"19:58","startHours":18.21419738711835,"endHours":19.96419738711835,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:48","end":"00:38","startHours":23.798657202558996,"endHours":24.631849725628914,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"05:58","end":"07:32","startHours":5.966309541069561,"endHours":7.528545521825659,"quality":"inauspicious"},{"name":"Udveg","start":"07:32","end":"09:05","startHours":7.528545521825659,"endHours":9.090781502581759,"quality":"inauspicious"},{"name":"Chala","start":"09:05","end":"10:39","startHours":9.090781502581759,"endHours":10.653017483337857,"quality":"neutral"},{"name":"Labha","start":"10:39","end":"12:13","startHours":10.653017483337857,"endHours":12.215253464093955,"quality":"auspicious"},{"name":"Amṛta","start":"12:13","end":"13:47","startHours":12.215253464093955,"endHours":13.777489444850055,"quality":"auspicious"},{"name":"Kāla","start":"13:47","end":"15:20","startHours":13.777489444850055,"endHours":15.339725425606154,"quality":"inauspicious"},{"name":"Śubha","start":"15:20","end":"16:54","startHours":15.339725425606154,"endHours":16.90196140636225,"quality":"auspicious"},{"name":"Roga","start":"16:54","end":"18:28","startHours":16.90196140636225,"endHours":18.46419738711835,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"18:28","end":"19:54","startHours":18.46419738711835,"endHours":19.90196140636225,"quality":"inauspicious"},{"name":"Śubha","start":"19:54","end":"21:20","startHours":19.90196140636225,"endHours":21.339725425606154,"quality":"auspicious"},{"name":"Roga","start":"21:20","end":"22:47","startHours":21.339725425606154,"endHours":22.777489444850055,"quality":"inauspicious"},{"name":"Udveg","start":"22:47","end":"00:13","startHours":22.777489444850055,"endHours":24.215253464093955,"quality":"inauspicious"},{"name":"Chala","start":"00:13","end":"01:39","startHours":24.215253464093955,"endHours":25.653017483337855,"quality":"neutral"},{"name":"Labha","start":"01:39","end":"03:05","startHours":25.653017483337855,"endHours":27.090781502581756,"quality":"auspicious"},{"name":"Amṛta","start":"03:05","end":"04:32","startHours":27.090781502581756,"endHours":28.52854552182566,"quality":"auspicious"},{"name":"Kāla","start":"04:32","end":"05:58","startHours":28.52854552182566,"endHours":29.96630954106956,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:58","end":"06:58","startHours":5.966309541069561,"endHours":6.966309541069561,"planetary_lord":"Mars"},{"name":"Hora 2","start":"06:58","end":"07:58","startHours":6.966309541069561,"endHours":7.966309541069561,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"07:58","end":"08:58","startHours":7.966309541069561,"endHours":8.96630954106956,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"08:58","end":"09:58","startHours":8.96630954106956,"endHours":9.96630954106956,"planetary_lord":"Moon"},{"name":"Hora 5","start":"09:58","end":"10:58","startHours":9.96630954106956,"endHours":10.96630954106956,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"10:58","end":"11:58","startHours":10.96630954106956,"endHours":11.96630954106956,"planetary_lord":"Venus"},{"name":"Hora 7","start":"11:58","end":"12:58","startHours":11.96630954106956,"endHours":12.96630954106956,"planetary_lord":"Sun"},{"name":"Hora 8","start":"12:58","end":"13:58","startHours":12.96630954106956,"endHours":13.96630954106956,"planetary_lord":"Mars"},{"name":"Hora 9","start":"13:58","end":"14:58","startHours":13.96630954106956,"endHours":14.96630954106956,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"14:58","end":"15:58","startHours":14.96630954106956,"endHours":15.96630954106956,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"15:58","end":"16:58","startHours":15.96630954106956,"endHours":16.96630954106956,"planetary_lord":"Moon"},{"name":"Hora 12","start":"16:58","end":"17:58","startHours":16.96630954106956,"endHours":17.96630954106956,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"17:58","end":"18:58","startHours":17.96630954106956,"endHours":18.96630954106956,"planetary_lord":"Venus"},{"name":"Hora 14","start":"18:58","end":"19:58","startHours":18.96630954106956,"endHours":19.96630954106956,"planetary_lord":"Sun"},{"name":"Hora 15","start":"19:58","end":"20:58","startHours":19.96630954106956,"endHours":20.96630954106956,"planetary_lord":"Mars"},{"name":"Hora 16","start":"20:58","end":"21:58","startHours":20.96630954106956,"endHours":21.96630954106956,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"21:58","end":"22:58","startHours":21.96630954106956,"endHours":22.96630954106956,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"22:58","end":"23:58","startHours":22.96630954106956,"endHours":23.96630954106956,"planetary_lord":"Moon"},{"name":"Hora 19","start":"23:58","end":"00:58","startHours":23.96630954106956,"endHours":24.96630954106956,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"00:58","end":"01:58","startHours":24.96630954106956,"endHours":25.96630954106956,"planetary_lord":"Venus"},{"name":"Hora 21","start":"01:58","end":"02:58","startHours":25.96630954106956,"endHours":26.96630954106956,"planetary_lord":"Sun"},{"name":"Hora 22","start":"02:58","end":"03:58","startHours":26.96630954106956,"endHours":27.96630954106956,"planetary_lord":"Mars"},{"name":"Hora 23","start":"03:58","end":"04:58","startHours":27.96630954106956,"endHours":28.96630954106956,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"04:58","end":"05:58","startHours":28.96630954106956,"endHours":29.96630954106956,"planetary_lord":"Saturn"}],"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":["Meṣa","Mithuna","Kanyā","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Karka","Siṃha","Vṛścika","Dhanu","Mīna"]},"dishaShool":"North (Uttara)","chandraVasa":"East","rahuVasa":"North","anandadiYoga":{"name":"Vajra","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":4.762264810332342,"eotMinutes":4.014392154362758,"ayanamsa":25.6926}},"calendars":{"vikram_samvat":2188,"vikram_samvatsara":"Krodhi","saka_samvat":2053,"saka_samvatsara":"Khara","bengali_samvat":1538,"malayalam_era":1307,"nanakshahi_year":662,"lunar_month":"Āśvina","lunar_month_paksha_full":"Āśvina Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Āśvina","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":"Śarad (Autumn)","display_summary":"Āśvina Kṛṣṇa Caturthī · Vikram 2188 Krodhi · Śaka 2053 Khara"},"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":"sankashti-chaturthi","name":"Saṅkaṣṭī Caturthī","name_sanskrit":"सङ्कष्टी चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Gaṇeśa vrata.","vrata":true,"detection":{"tithi_number":19,"tithi_paksha":"Kṛṣṇa"},"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":"-3101-02-18","event":"Kali Yuga Epoch","chart_id":"kali-yuga-epoch","shared_marker":"same Aśvinī","url":"/day/-3101-02-18","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 September 11, 2131 CE · Ṛṣikeśa · Vidhyamitra","description":"September 11, 2131 CE for Ṛṣikeśa: Kṛṣṇa Caturthī, sūryodaya 05:58, sūryāsta 18:28.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/2131-09-11","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/2131-09-11","sa":"https://sa.vidhyamitra.com/city/rishikesh/2131-09-11","hi":"https://hi.vidhyamitra.com/city/rishikesh/2131-09-11","x-default":"https://vidhyamitra.com/city/rishikesh/2131-09-11"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T10:09:50.510Z","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":"2026-05-31T10:09:50.510Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T10:09:50.510Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}