{"id":"vidhyamitra:city-day:rishikesh:2018-09-15:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/2018-09-15","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2018-09-15","date_display":"September 15, 2018 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":2018,"month":9,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2458376.770833,"kali_year":5120,"ahargana":1869911.2708,"sun":{"sidereal_longitude":147.2814,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":214.4057,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":6,"name":"Ṣaṣṭhī","paksha":"Śukla","full_name":"Śukla Ṣaṣṭhī","elongation_degrees":67.1244,"elapsed_within_tithi_degrees":7.1244},"nakshatra":{"number":17,"name":"Anurādhā","pada":1,"moon_longitude":214.4057,"elapsed_within_degrees":1.0724},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":1.6871},"karana":{"half_tithi_index":11,"name":"Taitila"},"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":2018,"month":9,"day":15,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2458376.770833,"ahargana":1869911.2708,"kali_year":5120,"ayanamsa_lahiri":24.1143,"grahas":{"sun":{"sidereal_longitude":148.05328599999996,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":216.03748599999994,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":1},"retrograde":false,"latitude":4.1919},"mars":{"sidereal_longitude":276.483786,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":142.40568599999995,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":205.08068600000001,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":189.47488599999997,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":248.376986,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":103.1022,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":283.1022,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":2018,"month":9,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2458376.770833,"kali_year":5120,"ahargana":1869911.2708,"sun":{"sidereal_longitude":147.2814,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":214.4057,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":6,"name":"Ṣaṣṭhī","paksha":"Śukla","full_name":"Śukla Ṣaṣṭhī","elongation_degrees":67.1244,"elapsed_within_tithi_degrees":7.1244},"nakshatra":{"number":17,"name":"Anurādhā","pada":1,"moon_longitude":214.4057,"elapsed_within_degrees":1.0724},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":1.6871},"karana":{"half_tithi_index":11,"name":"Taitila"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.192,"elongation":67.124},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.192,"opposition_distance":112.876}},"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":"06:00","sunsetLocal":"18:23","solarNoonLocal":"12:11","dayLengthHours":12.368942798419488,"dayLengthDisplay":"12 Hours 22 Mins 08 Secs","nightLengthDisplay":"11 Hours 37 Mins 52 Secs","moonriseLocal":"11:30","moonsetLocal":"21:57","rahuKala":{"name":"Rāhu Kāla","start":"09:06","end":"10:39","startHours":9.098313080671755,"endHours":10.64443093047419,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:44","end":"15:17","startHours":13.736666630079062,"endHours":15.282784479881498,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:00","end":"07:33","startHours":6.006077381066882,"endHours":7.5521952308693185,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:54","end":"09:18","startHours":8.89216403403143,"endHours":9.304462127312078,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:31","end":"06:51","startHours":6.521449997667695,"endHours":6.8512884722922145,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:47","end":"12:36","startHours":11.778250686995978,"endHours":12.602846873557276,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:21","end":"05:11","startHours":4.356885007944284,"endHours":5.181481194505583,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:59","end":"06:00","startHours":4.975332147865259,"endHours":6.006077381066882,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:15","end":"15:05","startHours":14.252039246679875,"endHours":15.076635433241174,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:11","end":"18:35","startHours":18.17502017948637,"endHours":18.57502017948637,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:23","end":"18:53","startHours":18.37502017948637,"endHours":18.89039279608718,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:08","end":"19:53","startHours":18.12502017948637,"endHours":19.87502017948637,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:47","end":"00:36","startHours":23.778250686995978,"endHours":24.60284687355728,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"06:00","end":"07:33","startHours":6.006077381066882,"endHours":7.5521952308693185,"quality":"inauspicious"},{"name":"Śubha","start":"07:33","end":"09:06","startHours":7.5521952308693185,"endHours":9.098313080671755,"quality":"auspicious"},{"name":"Roga","start":"09:06","end":"10:39","startHours":9.098313080671755,"endHours":10.64443093047419,"quality":"inauspicious"},{"name":"Udveg","start":"10:39","end":"12:11","startHours":10.64443093047419,"endHours":12.190548780276625,"quality":"inauspicious"},{"name":"Chala","start":"12:11","end":"13:44","startHours":12.190548780276625,"endHours":13.736666630079062,"quality":"neutral"},{"name":"Labha","start":"13:44","end":"15:17","startHours":13.736666630079062,"endHours":15.282784479881498,"quality":"auspicious"},{"name":"Amṛta","start":"15:17","end":"16:50","startHours":15.282784479881498,"endHours":16.828902329683935,"quality":"auspicious"},{"name":"Kāla","start":"16:50","end":"18:23","startHours":16.828902329683935,"endHours":18.37502017948637,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:23","end":"19:50","startHours":18.37502017948637,"endHours":19.828902329683935,"quality":"auspicious"},{"name":"Amṛta","start":"19:50","end":"21:17","startHours":19.828902329683935,"endHours":21.2827844798815,"quality":"auspicious"},{"name":"Kāla","start":"21:17","end":"22:44","startHours":21.2827844798815,"endHours":22.736666630079064,"quality":"inauspicious"},{"name":"Śubha","start":"22:44","end":"00:11","startHours":22.736666630079064,"endHours":24.190548780276625,"quality":"auspicious"},{"name":"Roga","start":"00:11","end":"01:39","startHours":24.190548780276625,"endHours":25.64443093047419,"quality":"inauspicious"},{"name":"Udveg","start":"01:39","end":"03:06","startHours":25.64443093047419,"endHours":27.098313080671755,"quality":"inauspicious"},{"name":"Chala","start":"03:06","end":"04:33","startHours":27.098313080671755,"endHours":28.552195230869316,"quality":"neutral"},{"name":"Labha","start":"04:33","end":"06:00","startHours":28.552195230869316,"endHours":30.00607738106688,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:00","end":"07:00","startHours":6.006077381066882,"endHours":7.006077381066882,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"07:00","end":"08:00","startHours":7.006077381066882,"endHours":8.006077381066882,"planetary_lord":"Moon"},{"name":"Hora 3","start":"08:00","end":"09:00","startHours":8.006077381066882,"endHours":9.006077381066882,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"09:00","end":"10:00","startHours":9.006077381066882,"endHours":10.006077381066882,"planetary_lord":"Venus"},{"name":"Hora 5","start":"10:00","end":"11:00","startHours":10.006077381066882,"endHours":11.006077381066882,"planetary_lord":"Sun"},{"name":"Hora 6","start":"11:00","end":"12:00","startHours":11.006077381066882,"endHours":12.006077381066882,"planetary_lord":"Mars"},{"name":"Hora 7","start":"12:00","end":"13:00","startHours":12.006077381066882,"endHours":13.006077381066882,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"13:00","end":"14:00","startHours":13.006077381066882,"endHours":14.006077381066882,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"14:00","end":"15:00","startHours":14.006077381066882,"endHours":15.006077381066882,"planetary_lord":"Moon"},{"name":"Hora 10","start":"15:00","end":"16:00","startHours":15.006077381066882,"endHours":16.00607738106688,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"16:00","end":"17:00","startHours":16.00607738106688,"endHours":17.00607738106688,"planetary_lord":"Venus"},{"name":"Hora 12","start":"17:00","end":"18:00","startHours":17.00607738106688,"endHours":18.00607738106688,"planetary_lord":"Sun"},{"name":"Hora 13","start":"18:00","end":"19:00","startHours":18.00607738106688,"endHours":19.00607738106688,"planetary_lord":"Mars"},{"name":"Hora 14","start":"19:00","end":"20:00","startHours":19.00607738106688,"endHours":20.00607738106688,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"20:00","end":"21:00","startHours":20.00607738106688,"endHours":21.00607738106688,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"21:00","end":"22:00","startHours":21.00607738106688,"endHours":22.00607738106688,"planetary_lord":"Moon"},{"name":"Hora 17","start":"22:00","end":"23:00","startHours":22.00607738106688,"endHours":23.00607738106688,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"23:00","end":"00:00","startHours":23.00607738106688,"endHours":24.00607738106688,"planetary_lord":"Venus"},{"name":"Hora 19","start":"00:00","end":"01:00","startHours":24.00607738106688,"endHours":25.00607738106688,"planetary_lord":"Sun"},{"name":"Hora 20","start":"01:00","end":"02:00","startHours":25.00607738106688,"endHours":26.00607738106688,"planetary_lord":"Mars"},{"name":"Hora 21","start":"02:00","end":"03:00","startHours":26.00607738106688,"endHours":27.00607738106688,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"03:00","end":"04:00","startHours":27.00607738106688,"endHours":28.00607738106688,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"04:00","end":"05:00","startHours":28.00607738106688,"endHours":29.00607738106688,"planetary_lord":"Moon"},{"name":"Hora 24","start":"05:00","end":"06:00","startHours":29.00607738106688,"endHours":30.00607738106688,"planetary_lord":"Mercury"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Revatī"],"unfavorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Citrā","Svātī","Viśākhā","Anurādhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Vṛścika","Makara"],"unfavorable_rashis":["Mithuna","Karka","Tulā","Dhanu","Kumbha","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"North-East","rahuVasa":"East","anandadiYoga":{"name":"Mānasa","quality":"Auspicious"},"drikRitu":"Varṣā (Monsoon) (Drik)","vedicRitu":"Varṣā (Monsoon)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":3.107034480395168,"eotMinutes":5.496673183402374,"ayanamsa":24.1143}},"calendars":{"vikram_samvat":2075,"vikram_samvatsara":"Virodhakṛt","saka_samvat":1940,"saka_samvatsara":"Vilambī","bengali_samvat":1425,"malayalam_era":1194,"nanakshahi_year":549,"lunar_month":"Bhādrapada","lunar_month_paksha_full":"Bhādrapada Śukla Pakṣa","solar_month":"Siṃha (Āvaṇi)","ritu":"Varṣā (Monsoon)","display_summary":"Bhādrapada Śukla Ṣaṣṭhī · Vikram 2075 Virodhakṛt · Śaka 1940 Vilambī"},"festivals":[{"id":"subrahmanya-shashthi","name":"Subrahmaṇya Ṣaṣṭhī","name_sanskrit":"सुब्रह्मण्य षष्ठी","tradition":"Shaiva","associated_deity":"Kārttikeya","significance":"Worship of Kārttikeya as Subrahmaṇya.","vrata":true,"detection":{"tithi_number":6,"tithi_paksha":"Śukla","lunar_month":"Bhādrapada"},"precedence":4},{"id":"simha-sankranti","name":"Siṁha Saṅkrānti","name_sanskrit":"सिंह सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Leo.","vrata":false,"detection":{"sun_rashi":"Siṃha"},"precedence":5}],"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 15, 2018 CE · Ṛṣikeśa · Vidhyamitra","description":"September 15, 2018 CE for Ṛṣikeśa: Śukla Ṣaṣṭhī, sūryodaya 06:00, sūryāsta 18:23.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/2018-09-15","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/2018-09-15","sa":"https://sa.vidhyamitra.com/city/rishikesh/2018-09-15","hi":"https://hi.vidhyamitra.com/city/rishikesh/2018-09-15","x-default":"https://vidhyamitra.com/city/rishikesh/2018-09-15"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-15T12:07:27.039Z","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":"2026-05-15T12:07:27.039Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-15T12:07:27.039Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}