{"id":"vidhyamitra:city-day:rishikesh:1950-09-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1950-09-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1950-09-18","date_display":"September 18, 1950 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":1950,"month":9,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2433542.770833,"kali_year":5052,"ahargana":1845077.2708,"sun":{"sidereal_longitude":150.7804,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":228.0047,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":7,"name":"Saptamī","paksha":"Śukla","full_name":"Śukla Saptamī","elongation_degrees":77.2244,"elapsed_within_tithi_degrees":5.2244},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1,"moon_longitude":228.0047,"elapsed_within_degrees":1.3381},"yoga":{"number":2,"name":"Prīti","sum_longitude":18.7851},"karana":{"half_tithi_index":12,"name":"Gara"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"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":1950,"month":9,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2433542.770833,"ahargana":1845077.2708,"kali_year":5052,"ayanamsa_lahiri":23.1645,"grahas":{"sun":{"sidereal_longitude":151.394628,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":230.51852800000006,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2},"retrograde":false,"latitude":-4.2027},"mars":{"sidereal_longitude":212.18672800000002,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":150.80552799999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":307.38852799999995,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":true},"venus":{"sidereal_longitude":137.43242800000002,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":149.993128,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":338.9271,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":158.9271,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"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":1950,"month":9,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2433542.770833,"kali_year":5052,"ahargana":1845077.2708,"sun":{"sidereal_longitude":150.7804,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":228.0047,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":7,"name":"Saptamī","paksha":"Śukla","full_name":"Śukla Saptamī","elongation_degrees":77.2244,"elapsed_within_tithi_degrees":5.2244},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1,"moon_longitude":228.0047,"elapsed_within_degrees":1.3381},"yoga":{"number":2,"name":"Prīti","sum_longitude":18.7851},"karana":{"half_tithi_index":12,"name":"Gara"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.203,"elongation":77.224},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.203,"opposition_distance":102.776}},"eclipse_window_40days":[{"offset_days":-6,"type":"solar","occurs":true,"moon_latitude":1.306,"elongation":2.594},{"offset_days":8,"type":"lunar","occurs":true,"moon_latitude":0.007,"opposition_distance":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":"06:01","sunsetLocal":"18:19","solarNoonLocal":"12:10","dayLengthHours":12.295559238611837,"dayLengthDisplay":"12 Hours 17 Mins 44 Secs","nightLengthDisplay":"11 Hours 42 Mins 16 Secs","moonriseLocal":"12:19","moonsetLocal":"22:34","rahuKala":{"name":"Rāhu Kāla","start":"07:34","end":"09:06","startHours":7.561158249292655,"endHours":9.098103154119134,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:38","end":"12:10","startHours":10.635048058945614,"endHours":12.171992963772094,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:43","end":"15:15","startHours":13.708937868598573,"endHours":15.245882773425052,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:54","end":"09:18","startHours":8.893177166808936,"endHours":9.303029141429331,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:32","end":"06:52","startHours":6.536528312741669,"endHours":6.864409892437984,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:46","end":"12:35","startHours":11.7621409891517,"endHours":12.58184493839249,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:23","end":"05:12","startHours":4.384805445984597,"endHours":5.2045093952253865,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:00","end":"06:01","startHours":4.999583407915189,"endHours":6.024213344466175,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:13","end":"15:02","startHours":14.221252836874068,"endHours":15.040956786114858,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:07","end":"18:31","startHours":18.119772583078014,"endHours":18.519772583078012,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:19","end":"18:50","startHours":18.319772583078013,"endHours":18.832087551353506,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:04","end":"19:49","startHours":18.069772583078013,"endHours":19.819772583078013,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:46","end":"00:35","startHours":23.7621409891517,"endHours":24.58184493839249,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"06:01","end":"07:34","startHours":6.024213344466175,"endHours":7.561158249292655,"quality":"auspicious"},{"name":"Kāla","start":"07:34","end":"09:06","startHours":7.561158249292655,"endHours":9.098103154119134,"quality":"inauspicious"},{"name":"Śubha","start":"09:06","end":"10:38","startHours":9.098103154119134,"endHours":10.635048058945614,"quality":"auspicious"},{"name":"Roga","start":"10:38","end":"12:10","startHours":10.635048058945614,"endHours":12.171992963772094,"quality":"inauspicious"},{"name":"Udveg","start":"12:10","end":"13:43","startHours":12.171992963772094,"endHours":13.708937868598573,"quality":"inauspicious"},{"name":"Chala","start":"13:43","end":"15:15","startHours":13.708937868598573,"endHours":15.245882773425052,"quality":"neutral"},{"name":"Labha","start":"15:15","end":"16:47","startHours":15.245882773425052,"endHours":16.782827678251532,"quality":"auspicious"},{"name":"Amṛta","start":"16:47","end":"18:19","startHours":16.782827678251532,"endHours":18.319772583078013,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"18:19","end":"19:47","startHours":18.319772583078013,"endHours":19.782827678251532,"quality":"neutral"},{"name":"Labha","start":"19:47","end":"21:15","startHours":19.782827678251532,"endHours":21.245882773425052,"quality":"auspicious"},{"name":"Amṛta","start":"21:15","end":"22:43","startHours":21.245882773425052,"endHours":22.708937868598575,"quality":"auspicious"},{"name":"Kāla","start":"22:43","end":"00:10","startHours":22.708937868598575,"endHours":24.171992963772094,"quality":"inauspicious"},{"name":"Śubha","start":"00:10","end":"01:38","startHours":24.171992963772094,"endHours":25.635048058945614,"quality":"auspicious"},{"name":"Roga","start":"01:38","end":"03:06","startHours":25.635048058945614,"endHours":27.098103154119137,"quality":"inauspicious"},{"name":"Udveg","start":"03:06","end":"04:34","startHours":27.098103154119137,"endHours":28.561158249292657,"quality":"inauspicious"},{"name":"Chala","start":"04:34","end":"06:01","startHours":28.561158249292657,"endHours":30.024213344466176,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"06:01","end":"07:01","startHours":6.024213344466175,"endHours":7.024213344466175,"planetary_lord":"Moon"},{"name":"Hora 2","start":"07:01","end":"08:01","startHours":7.024213344466175,"endHours":8.024213344466176,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"08:01","end":"09:01","startHours":8.024213344466176,"endHours":9.024213344466176,"planetary_lord":"Venus"},{"name":"Hora 4","start":"09:01","end":"10:01","startHours":9.024213344466176,"endHours":10.024213344466176,"planetary_lord":"Sun"},{"name":"Hora 5","start":"10:01","end":"11:01","startHours":10.024213344466176,"endHours":11.024213344466176,"planetary_lord":"Mars"},{"name":"Hora 6","start":"11:01","end":"12:01","startHours":11.024213344466176,"endHours":12.024213344466176,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"12:01","end":"13:01","startHours":12.024213344466176,"endHours":13.024213344466176,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"13:01","end":"14:01","startHours":13.024213344466176,"endHours":14.024213344466176,"planetary_lord":"Moon"},{"name":"Hora 9","start":"14:01","end":"15:01","startHours":14.024213344466176,"endHours":15.024213344466176,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"15:01","end":"16:01","startHours":15.024213344466176,"endHours":16.024213344466176,"planetary_lord":"Venus"},{"name":"Hora 11","start":"16:01","end":"17:01","startHours":16.024213344466176,"endHours":17.024213344466176,"planetary_lord":"Sun"},{"name":"Hora 12","start":"17:01","end":"18:01","startHours":17.024213344466176,"endHours":18.024213344466176,"planetary_lord":"Mars"},{"name":"Hora 13","start":"18:01","end":"19:01","startHours":18.024213344466176,"endHours":19.024213344466176,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"19:01","end":"20:01","startHours":19.024213344466176,"endHours":20.024213344466176,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"20:01","end":"21:01","startHours":20.024213344466176,"endHours":21.024213344466176,"planetary_lord":"Moon"},{"name":"Hora 16","start":"21:01","end":"22:01","startHours":21.024213344466176,"endHours":22.024213344466176,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"22:01","end":"23:01","startHours":22.024213344466176,"endHours":23.024213344466176,"planetary_lord":"Venus"},{"name":"Hora 18","start":"23:01","end":"00:01","startHours":23.024213344466176,"endHours":24.024213344466176,"planetary_lord":"Sun"},{"name":"Hora 19","start":"00:01","end":"01:01","startHours":24.024213344466176,"endHours":25.024213344466176,"planetary_lord":"Mars"},{"name":"Hora 20","start":"01:01","end":"02:01","startHours":25.024213344466176,"endHours":26.024213344466176,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"02:01","end":"03:01","startHours":26.024213344466176,"endHours":27.024213344466176,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"03:01","end":"04:01","startHours":27.024213344466176,"endHours":28.024213344466176,"planetary_lord":"Moon"},{"name":"Hora 23","start":"04:01","end":"05:01","startHours":28.024213344466176,"endHours":29.024213344466176,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"05:01","end":"06:01","startHours":29.024213344466176,"endHours":30.024213344466176,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"unfavorable_nakshatras":["Ārdrā","Punarvasu","Puṣya","Aśleṣā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"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":"North-East","anandadiYoga":{"name":"Mausala","quality":"Inauspicious"},"tropicalRitu":"Varṣā (Monsoon)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":2.1612730157800684,"eotMinutes":6.610022173674397,"ayanamsa":23.1645}},"calendars":{"vikram_samvat":2007,"vikram_samvatsara":"Śobhana","saka_samvat":1872,"saka_samvatsara":"Vikṛti","bengali_samvat":1357,"malayalam_era":1126,"nanakshahi_year":481,"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":"Kanyā (Puraṭṭāsi)","ritu":"Varṣā (Monsoon)","display_summary":"Bhādrapada Śukla Saptamī · Vikram 2007 Śobhana · Śaka 1872 Vikṛti"},"festivals":[],"todays_walk":{"walk":{"id":"chandra-walk","name":"Candra Walk","name_sanskrit":"चन्द्र यात्रा","type":"graha","description":"Manas-control + BG 6.5-7.","step_count":5,"url":"/walk/chandra-walk"},"reason":"Somavāra (Monday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3137-10-20","event":"Karṇa-Vadha (Mahābhārata Day 17)","chart_id":"karna","shared_marker":"same Jyeṣṭhā","url":"/day/-3137-10-20","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 18, 1950 CE · Ṛṣikeśa · Vidhyamitra","description":"September 18, 1950 CE for Ṛṣikeśa: Śukla Saptamī, sūryodaya 06:01, sūryāsta 18:19.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1950-09-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1950-09-18","sa":"https://sa.vidhyamitra.com/city/rishikesh/1950-09-18","hi":"https://hi.vidhyamitra.com/city/rishikesh/1950-09-18","x-default":"https://vidhyamitra.com/city/rishikesh/1950-09-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T13:17:35.064Z","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":"2026-05-31T13:17:35.064Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T13:17:35.064Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}