{"id":"vidhyamitra:city-day:rishikesh:1980-11-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1980-11-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1980-11-18","date_display":"November 18, 1980 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":1980,"month":11,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444561.770833,"kali_year":5082,"ahargana":1856096.2708,"sun":{"sidereal_longitude":211.7279,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":335.807,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":124.0791,"elapsed_within_tithi_degrees":4.0791},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1,"moon_longitude":335.807,"elapsed_within_degrees":2.4737},"yoga":{"number":15,"name":"Vajra","sum_longitude":187.535},"karana":{"half_tithi_index":20,"name":"Vaṇija"},"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":1980,"month":11,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444561.770833,"ahargana":1856096.2708,"kali_year":5082,"ayanamsa_lahiri":23.5859,"grahas":{"sun":{"sidereal_longitude":212.272921,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":333.13862099999994,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":4},"retrograde":false,"latitude":-2.9339},"mars":{"sidereal_longitude":243.70802100000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":193.149321,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":160.41322100000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":false},"venus":{"sidereal_longitude":179.317721,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":162.762521,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":115.0874,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":295.0874,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","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":1980,"month":11,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444561.770833,"kali_year":5082,"ahargana":1856096.2708,"sun":{"sidereal_longitude":211.7279,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":335.807,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":124.0791,"elapsed_within_tithi_degrees":4.0791},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1,"moon_longitude":335.807,"elapsed_within_degrees":2.4737},"yoga":{"number":15,"name":"Vajra","sum_longitude":187.535},"karana":{"half_tithi_index":20,"name":"Vaṇija"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.934,"elongation":124.079},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.934,"opposition_distance":55.921}},"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":"06:45","sunsetLocal":"17:20","solarNoonLocal":"12:03","dayLengthHours":10.584845239820016,"dayLengthDisplay":"10 Hours 35 Mins 05 Secs","nightLengthDisplay":"13 Hours 24 Mins 55 Secs","moonriseLocal":"14:07","moonsetLocal":"02:06","rahuKala":{"name":"Rāhu Kāla","start":"14:41","end":"16:01","startHours":14.691574297974505,"endHours":16.014679952952008,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:24","end":"10:43","startHours":9.399151678064495,"endHours":10.722257333041998,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:03","end":"13:22","startHours":12.0453629880195,"endHours":13.368468642997001,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:13","end":"09:35","startHours":9.222737590734162,"endHours":9.57556576539483,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:12","end":"07:29","startHours":7.193975586435326,"endHours":7.47623812616386,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:42","end":"12:24","startHours":11.692534813358833,"endHours":12.398191162680167,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:20","end":"06:03","startHours":5.341627669466823,"endHours":6.047284018788158,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:52","end":"06:45","startHours":5.870869931457824,"endHours":6.752940368109492,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:49","end":"14:31","startHours":13.809503861322835,"endHours":14.515160210644169,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:08","end":"17:32","startHours":17.13778560792951,"endHours":17.537785607929507,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:20","end":"17:47","startHours":17.337785607929508,"endHours":17.77882082625534,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:05","end":"18:50","startHours":17.087785607929508,"endHours":18.837785607929508,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:42","end":"00:24","startHours":23.69253481335883,"endHours":24.398191162680167,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"06:45","end":"08:05","startHours":6.752940368109492,"endHours":8.076046023086993,"quality":"inauspicious"},{"name":"Udveg","start":"08:05","end":"09:24","startHours":8.076046023086993,"endHours":9.399151678064495,"quality":"inauspicious"},{"name":"Chala","start":"09:24","end":"10:43","startHours":9.399151678064495,"endHours":10.722257333041998,"quality":"neutral"},{"name":"Labha","start":"10:43","end":"12:03","startHours":10.722257333041998,"endHours":12.0453629880195,"quality":"auspicious"},{"name":"Amṛta","start":"12:03","end":"13:22","startHours":12.0453629880195,"endHours":13.368468642997001,"quality":"auspicious"},{"name":"Kāla","start":"13:22","end":"14:41","startHours":13.368468642997001,"endHours":14.691574297974505,"quality":"inauspicious"},{"name":"Śubha","start":"14:41","end":"16:01","startHours":14.691574297974505,"endHours":16.014679952952008,"quality":"auspicious"},{"name":"Roga","start":"16:01","end":"17:20","startHours":16.014679952952008,"endHours":17.337785607929508,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"17:20","end":"19:01","startHours":17.337785607929508,"endHours":19.014679952952005,"quality":"inauspicious"},{"name":"Śubha","start":"19:01","end":"20:41","startHours":19.014679952952005,"endHours":20.691574297974505,"quality":"auspicious"},{"name":"Roga","start":"20:41","end":"22:22","startHours":20.691574297974505,"endHours":22.368468642997,"quality":"inauspicious"},{"name":"Udveg","start":"22:22","end":"00:03","startHours":22.368468642997,"endHours":24.045362988019498,"quality":"inauspicious"},{"name":"Chala","start":"00:03","end":"01:43","startHours":24.045362988019498,"endHours":25.722257333042,"quality":"neutral"},{"name":"Labha","start":"01:43","end":"03:24","startHours":25.722257333042,"endHours":27.399151678064495,"quality":"auspicious"},{"name":"Amṛta","start":"03:24","end":"05:05","startHours":27.399151678064495,"endHours":29.076046023086995,"quality":"auspicious"},{"name":"Kāla","start":"05:05","end":"06:45","startHours":29.076046023086995,"endHours":30.752940368109492,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:45","end":"07:45","startHours":6.752940368109492,"endHours":7.752940368109492,"planetary_lord":"Mars"},{"name":"Hora 2","start":"07:45","end":"08:45","startHours":7.752940368109492,"endHours":8.752940368109492,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"08:45","end":"09:45","startHours":8.752940368109492,"endHours":9.752940368109492,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"09:45","end":"10:45","startHours":9.752940368109492,"endHours":10.752940368109492,"planetary_lord":"Moon"},{"name":"Hora 5","start":"10:45","end":"11:45","startHours":10.752940368109492,"endHours":11.752940368109492,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"11:45","end":"12:45","startHours":11.752940368109492,"endHours":12.752940368109492,"planetary_lord":"Venus"},{"name":"Hora 7","start":"12:45","end":"13:45","startHours":12.752940368109492,"endHours":13.752940368109492,"planetary_lord":"Sun"},{"name":"Hora 8","start":"13:45","end":"14:45","startHours":13.752940368109492,"endHours":14.752940368109492,"planetary_lord":"Mars"},{"name":"Hora 9","start":"14:45","end":"15:45","startHours":14.752940368109492,"endHours":15.752940368109492,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"15:45","end":"16:45","startHours":15.752940368109492,"endHours":16.752940368109492,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"16:45","end":"17:45","startHours":16.752940368109492,"endHours":17.752940368109492,"planetary_lord":"Moon"},{"name":"Hora 12","start":"17:45","end":"18:45","startHours":17.752940368109492,"endHours":18.752940368109492,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"18:45","end":"19:45","startHours":18.752940368109492,"endHours":19.752940368109492,"planetary_lord":"Venus"},{"name":"Hora 14","start":"19:45","end":"20:45","startHours":19.752940368109492,"endHours":20.752940368109492,"planetary_lord":"Sun"},{"name":"Hora 15","start":"20:45","end":"21:45","startHours":20.752940368109492,"endHours":21.752940368109492,"planetary_lord":"Mars"},{"name":"Hora 16","start":"21:45","end":"22:45","startHours":21.752940368109492,"endHours":22.752940368109492,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"22:45","end":"23:45","startHours":22.752940368109492,"endHours":23.752940368109492,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"23:45","end":"00:45","startHours":23.752940368109492,"endHours":24.752940368109492,"planetary_lord":"Moon"},{"name":"Hora 19","start":"00:45","end":"01:45","startHours":24.752940368109492,"endHours":25.752940368109492,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"01:45","end":"02:45","startHours":25.752940368109492,"endHours":26.752940368109492,"planetary_lord":"Venus"},{"name":"Hora 21","start":"02:45","end":"03:45","startHours":26.752940368109492,"endHours":27.752940368109492,"planetary_lord":"Sun"},{"name":"Hora 22","start":"03:45","end":"04:45","startHours":27.752940368109492,"endHours":28.752940368109492,"planetary_lord":"Mars"},{"name":"Hora 23","start":"04:45","end":"05:45","startHours":28.752940368109492,"endHours":29.752940368109492,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"05:45","end":"06:45","startHours":29.752940368109492,"endHours":30.752940368109492,"planetary_lord":"Saturn"}],"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":["Vṛṣabha","Siṃha","Kanyā","Dhanu","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Karka","Tulā","Vṛścika","Kumbha"]},"dishaShool":"North (Uttara)","chandraVasa":"South-West","rahuVasa":"North","anandadiYoga":{"name":"Dhvānkṣa","quality":"Inauspicious"},"tropicalRitu":"Śarad (Autumn)","vedicRitu":"Śarad (Autumn)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-19.21938428625364,"eotMinutes":14.207820718830007,"ayanamsa":23.5859}},"calendars":{"vikram_samvat":2037,"vikram_samvatsara":"Śrīmukha","saka_samvat":1902,"saka_samvatsara":"Raudra","bengali_samvat":1387,"malayalam_era":1156,"nanakshahi_year":511,"lunar_month":"Kārtika","lunar_month_paksha_full":"Kārtika Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Kārtika","lunar_month_amanta":"Kārtika","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Vṛścika (Kārttikai)","ritu":"Śarad (Autumn)","display_summary":"Kārtika Śukla Ekādaśī · Vikram 2037 Śrīmukha · Śaka 1902 Raudra"},"festivals":[{"id":"devotthana-ekadashi","name":"Devotthāna Ekādaśī (Prabodhinī)","name_sanskrit":"देवोत्थान एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Bhagavān Viṣṇu awakens; Cāturmāsya ends; weddings can resume.","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Kārtika"},"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 November 18, 1980 CE · Ṛṣikeśa · Vidhyamitra","description":"November 18, 1980 CE for Ṛṣikeśa: Śukla Ekādaśī, sūryodaya 06:45, sūryāsta 17:20.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1980-11-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1980-11-18","sa":"https://sa.vidhyamitra.com/city/rishikesh/1980-11-18","hi":"https://hi.vidhyamitra.com/city/rishikesh/1980-11-18","x-default":"https://vidhyamitra.com/city/rishikesh/1980-11-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T11:34:05.927Z","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":"2026-05-31T11:34:05.927Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T11:34:05.927Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}