{"id":"vidhyamitra:city-day:rishikesh:1975-09-16:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1975-09-16","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1975-09-16","date_display":"September 16, 1975 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":1975,"month":9,"day":16,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2442671.770833,"kali_year":5077,"ahargana":1854206.2708,"sun":{"sidereal_longitude":148.3768,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":277.4536,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":129.0768,"elapsed_within_tithi_degrees":9.0768},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4,"moon_longitude":277.4536,"elapsed_within_degrees":10.7869},"yoga":{"number":5,"name":"Śobhana","sum_longitude":65.8304},"karana":{"half_tithi_index":21,"name":"Viṣṭi"},"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":1975,"month":9,"day":16,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2442671.770833,"ahargana":1854206.2708,"kali_year":5077,"ayanamsa_lahiri":23.5136,"grahas":{"sun":{"sidereal_longitude":149.04663300000004,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":280.09723299999996,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":false,"latitude":3.9806},"mars":{"sidereal_longitude":54.806332999999995,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":176.03133300000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":359.512133,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":true},"venus":{"sidereal_longitude":122.240433,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":96.45323300000001,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":215.2287,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":35.2287,"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":1975,"month":9,"day":16,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2442671.770833,"kali_year":5077,"ahargana":1854206.2708,"sun":{"sidereal_longitude":148.3768,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":277.4536,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":129.0768,"elapsed_within_tithi_degrees":9.0768},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4,"moon_longitude":277.4536,"elapsed_within_degrees":10.7869},"yoga":{"number":5,"name":"Śobhana","sum_longitude":65.8304},"karana":{"half_tithi_index":21,"name":"Viṣṭi"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.981,"elongation":129.077},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.981,"opposition_distance":50.923}},"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":"18:22","solarNoonLocal":"12:11","dayLengthHours":12.356903534838187,"dayLengthDisplay":"12 Hours 21 Mins 25 Secs","nightLengthDisplay":"11 Hours 38 Mins 35 Secs","moonriseLocal":"15:39","moonsetLocal":"02:11","rahuKala":{"name":"Rāhu Kāla","start":"15:16","end":"16:49","startHours":15.273580699864068,"endHours":16.818193641718842,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:06","end":"10:38","startHours":9.095128932444975,"endHours":10.639741874299748,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:11","end":"13:44","startHours":12.18435481615452,"endHours":13.728967758009295,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:53","end":"09:18","startHours":8.889180540197671,"endHours":9.301077324692278,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:31","end":"06:51","startHours":6.520774029353686,"endHours":6.850291456949371,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:46","end":"12:36","startHours":11.772458031659914,"endHours":12.596251600649127,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:21","end":"05:11","startHours":4.358315910757003,"endHours":5.182109479746216,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:59","end":"06:00","startHours":4.976161087498912,"endHours":6.005903048735428,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:15","end":"15:04","startHours":14.243838738627554,"endHours":15.067632307616767,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:10","end":"18:34","startHours":18.162806583573616,"endHours":18.562806583573614,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:22","end":"18:53","startHours":18.362806583573615,"endHours":18.877677564191874,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:07","end":"19:52","startHours":18.112806583573615,"endHours":19.862806583573615,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:46","end":"00:36","startHours":23.772458031659916,"endHours":24.596251600649126,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"06:00","end":"07:33","startHours":6.005903048735428,"endHours":7.550515990590202,"quality":"inauspicious"},{"name":"Udveg","start":"07:33","end":"09:06","startHours":7.550515990590202,"endHours":9.095128932444975,"quality":"inauspicious"},{"name":"Chala","start":"09:06","end":"10:38","startHours":9.095128932444975,"endHours":10.639741874299748,"quality":"neutral"},{"name":"Labha","start":"10:38","end":"12:11","startHours":10.639741874299748,"endHours":12.18435481615452,"quality":"auspicious"},{"name":"Amṛta","start":"12:11","end":"13:44","startHours":12.18435481615452,"endHours":13.728967758009295,"quality":"auspicious"},{"name":"Kāla","start":"13:44","end":"15:16","startHours":13.728967758009295,"endHours":15.273580699864068,"quality":"inauspicious"},{"name":"Śubha","start":"15:16","end":"16:49","startHours":15.273580699864068,"endHours":16.818193641718842,"quality":"auspicious"},{"name":"Roga","start":"16:49","end":"18:22","startHours":16.818193641718842,"endHours":18.362806583573615,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"18:22","end":"19:49","startHours":18.362806583573615,"endHours":19.818193641718842,"quality":"inauspicious"},{"name":"Śubha","start":"19:49","end":"21:16","startHours":19.818193641718842,"endHours":21.27358069986407,"quality":"auspicious"},{"name":"Roga","start":"21:16","end":"22:44","startHours":21.27358069986407,"endHours":22.728967758009297,"quality":"inauspicious"},{"name":"Udveg","start":"22:44","end":"00:11","startHours":22.728967758009297,"endHours":24.18435481615452,"quality":"inauspicious"},{"name":"Chala","start":"00:11","end":"01:38","startHours":24.18435481615452,"endHours":25.639741874299748,"quality":"neutral"},{"name":"Labha","start":"01:38","end":"03:06","startHours":25.639741874299748,"endHours":27.095128932444975,"quality":"auspicious"},{"name":"Amṛta","start":"03:06","end":"04:33","startHours":27.095128932444975,"endHours":28.5505159905902,"quality":"auspicious"},{"name":"Kāla","start":"04:33","end":"06:00","startHours":28.5505159905902,"endHours":30.005903048735426,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:00","end":"07:00","startHours":6.005903048735428,"endHours":7.005903048735428,"planetary_lord":"Mars"},{"name":"Hora 2","start":"07:00","end":"08:00","startHours":7.005903048735428,"endHours":8.005903048735428,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"08:00","end":"09:00","startHours":8.005903048735428,"endHours":9.005903048735428,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"09:00","end":"10:00","startHours":9.005903048735428,"endHours":10.005903048735428,"planetary_lord":"Moon"},{"name":"Hora 5","start":"10:00","end":"11:00","startHours":10.005903048735428,"endHours":11.005903048735428,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"11:00","end":"12:00","startHours":11.005903048735428,"endHours":12.005903048735428,"planetary_lord":"Venus"},{"name":"Hora 7","start":"12:00","end":"13:00","startHours":12.005903048735428,"endHours":13.005903048735428,"planetary_lord":"Sun"},{"name":"Hora 8","start":"13:00","end":"14:00","startHours":13.005903048735428,"endHours":14.005903048735428,"planetary_lord":"Mars"},{"name":"Hora 9","start":"14:00","end":"15:00","startHours":14.005903048735428,"endHours":15.005903048735428,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"15:00","end":"16:00","startHours":15.005903048735428,"endHours":16.005903048735426,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"16:00","end":"17:00","startHours":16.005903048735426,"endHours":17.005903048735426,"planetary_lord":"Moon"},{"name":"Hora 12","start":"17:00","end":"18:00","startHours":17.005903048735426,"endHours":18.005903048735426,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"18:00","end":"19:00","startHours":18.005903048735426,"endHours":19.005903048735426,"planetary_lord":"Venus"},{"name":"Hora 14","start":"19:00","end":"20:00","startHours":19.005903048735426,"endHours":20.005903048735426,"planetary_lord":"Sun"},{"name":"Hora 15","start":"20:00","end":"21:00","startHours":20.005903048735426,"endHours":21.005903048735426,"planetary_lord":"Mars"},{"name":"Hora 16","start":"21:00","end":"22:00","startHours":21.005903048735426,"endHours":22.005903048735426,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"22:00","end":"23:00","startHours":22.005903048735426,"endHours":23.005903048735426,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"23:00","end":"00:00","startHours":23.005903048735426,"endHours":24.005903048735426,"planetary_lord":"Moon"},{"name":"Hora 19","start":"00:00","end":"01:00","startHours":24.005903048735426,"endHours":25.005903048735426,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"01:00","end":"02:00","startHours":25.005903048735426,"endHours":26.005903048735426,"planetary_lord":"Venus"},{"name":"Hora 21","start":"02:00","end":"03:00","startHours":26.005903048735426,"endHours":27.005903048735426,"planetary_lord":"Sun"},{"name":"Hora 22","start":"03:00","end":"04:00","startHours":27.005903048735426,"endHours":28.005903048735426,"planetary_lord":"Mars"},{"name":"Hora 23","start":"04:00","end":"05:00","startHours":28.005903048735426,"endHours":29.005903048735426,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"05:00","end":"06:00","startHours":29.005903048735426,"endHours":30.005903048735426,"planetary_lord":"Saturn"}],"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":["Mithuna","Karka","Tulā","Vṛścika","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Dhanu","Kumbha"]},"dishaShool":"North (Uttara)","chandraVasa":"South-East","rahuVasa":"North","anandadiYoga":{"name":"Ānanda","quality":"Auspicious"},"tropicalRitu":"Varṣā (Monsoon) (tropical)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":2.95203455057916,"eotMinutes":5.868311030728706,"ayanamsa":23.5136}},"calendars":{"vikram_samvat":2032,"vikram_samvatsara":"Vibhava","saka_samvat":1897,"saka_samvatsara":"Rākṣasa","bengali_samvat":1382,"malayalam_era":1151,"nanakshahi_year":506,"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 Ekādaśī · Vikram 2032 Vibhava · Śaka 1897 Rākṣasa"},"festivals":[{"id":"parsva-ekadashi","name":"Pārśva (Parivartinī) Ekādaśī","name_sanskrit":"पार्श्व एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu (turning side in yoga-nidrā)","significance":"Viṣṇu turns from one side to another in yoga-nidrā (mid-Cāturmāsya).","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Bhādrapada"},"precedence":3},{"id":"ekadashi","name":"Ekādaśī","name_sanskrit":"एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Sacred to Bhagavān Viṣṇu; vrata for purification.","vrata":true,"detection":{"any_of":[{"tithi_number":11},{"tithi_number":26}]},"precedence":5}],"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":[]},"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 16, 1975 CE · Ṛṣikeśa · Vidhyamitra","description":"September 16, 1975 CE for Ṛṣikeśa: Śukla Ekādaśī, sūryodaya 06:00, sūryāsta 18:22.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1975-09-16","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1975-09-16","sa":"https://sa.vidhyamitra.com/city/rishikesh/1975-09-16","hi":"https://hi.vidhyamitra.com/city/rishikesh/1975-09-16","x-default":"https://vidhyamitra.com/city/rishikesh/1975-09-16"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T15:05:52.137Z","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":"2026-06-01T15:05:52.137Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T15:05:52.137Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}