{"id":"vidhyamitra:city-day:chicago:1981-08-11:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/chicago/1981-08-11","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-08-11","date_display":"August 11, 1981 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":1981,"month":8,"day":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444827.770833,"kali_year":5083,"ahargana":1856362.2708,"sun":{"sidereal_longitude":114.1507,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":239.1597,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":125.009,"elapsed_within_tithi_degrees":5.009},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4,"moon_longitude":239.1597,"elapsed_within_degrees":12.4931},"yoga":{"number":27,"name":"Vaidhṛti","sum_longitude":353.3105},"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":1981,"month":8,"day":11,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444827.770833,"ahargana":1856362.2708,"kali_year":5083,"ayanamsa_lahiri":23.5961,"grahas":{"sun":{"sidereal_longitude":114.699858,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":240.13525800000002,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false,"latitude":2.9997},"mars":{"sidereal_longitude":82.41625799999997,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":115.82115799999997,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":164.47305800000004,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"venus":{"sidereal_longitude":147.66765799999996,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":162.573258,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":100.9935,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":280.9935,"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":1981,"month":8,"day":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444827.770833,"kali_year":5083,"ahargana":1856362.2708,"sun":{"sidereal_longitude":114.1507,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":239.1597,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":125.009,"elapsed_within_tithi_degrees":5.009},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4,"moon_longitude":239.1597,"elapsed_within_degrees":12.4931},"yoga":{"number":27,"name":"Vaidhṛti","sum_longitude":353.3105},"karana":{"half_tithi_index":20,"name":"Vaṇija"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3,"elongation":125.009},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3,"opposition_distance":54.991}},"eclipse_window_40days":[{"offset_days":-11,"type":"solar","occurs":true,"moon_latitude":0.181,"elongation":0.207}]},"city":{"slug":"chicago","name":"Chicago, USA","lat":41.8781,"lon":-87.6298,"tz_offset_hours":-6,"country":"US","tier":"diaspora"},"tier2":{"city":{"slug":"chicago","name":"Chicago, USA","lat":41.8781,"lon":-87.6298,"tz_offset_hours":-6,"country":"US","tier":"diaspora"},"sunriseLocal":"04:54","sunsetLocal":"18:57","solarNoonLocal":"11:55","dayLengthHours":14.058825521223653,"dayLengthDisplay":"14 Hours 03 Mins 32 Secs","nightLengthDisplay":"9 Hours 56 Mins 28 Secs","moonriseLocal":"15:44","moonsetLocal":"00:50","rahuKala":{"name":"Rāhu Kāla","start":"15:26","end":"17:12","startHours":15.438474675837043,"endHours":17.19582786599,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"08:25","end":"10:10","startHours":8.409061915225216,"endHours":10.166415105378174,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"11:55","end":"13:41","startHours":11.92376829553113,"endHours":13.681121485684088,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:10","end":"08:39","startHours":8.174748156538156,"endHours":8.643375673912278,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:29","end":"05:51","startHours":5.4801399316369555,"endHours":5.855041945536253,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:27","end":"12:24","startHours":11.455140778157007,"endHours":12.392395812905251,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:01","end":"03:57","startHours":3.0198454654228164,"endHours":3.9571005001710597,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"03:43","end":"04:54","startHours":3.722786741483999,"endHours":4.8943555349193035,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:16","end":"15:12","startHours":14.26690588240174,"endHours":15.204160917149984,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:45","end":"19:09","startHours":18.753181056142957,"endHours":19.153181056142955,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:57","end":"19:32","startHours":18.953181056142956,"endHours":19.53896545286061,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:42","end":"20:27","startHours":18.703181056142956,"endHours":20.453181056142956,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:27","end":"00:24","startHours":23.45514077815701,"endHours":24.39239581290525,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"04:54","end":"06:39","startHours":4.8943555349193035,"endHours":6.65170872507226,"quality":"inauspicious"},{"name":"Udveg","start":"06:39","end":"08:25","startHours":6.65170872507226,"endHours":8.409061915225216,"quality":"inauspicious"},{"name":"Chala","start":"08:25","end":"10:10","startHours":8.409061915225216,"endHours":10.166415105378174,"quality":"neutral"},{"name":"Labha","start":"10:10","end":"11:55","startHours":10.166415105378174,"endHours":11.92376829553113,"quality":"auspicious"},{"name":"Amṛta","start":"11:55","end":"13:41","startHours":11.92376829553113,"endHours":13.681121485684088,"quality":"auspicious"},{"name":"Kāla","start":"13:41","end":"15:26","startHours":13.681121485684088,"endHours":15.438474675837043,"quality":"inauspicious"},{"name":"Śubha","start":"15:26","end":"17:12","startHours":15.438474675837043,"endHours":17.19582786599,"quality":"auspicious"},{"name":"Roga","start":"17:12","end":"18:57","startHours":17.19582786599,"endHours":18.953181056142956,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"18:57","end":"20:12","startHours":18.953181056142956,"endHours":20.195827865989997,"quality":"inauspicious"},{"name":"Śubha","start":"20:12","end":"21:26","startHours":20.195827865989997,"endHours":21.438474675837043,"quality":"auspicious"},{"name":"Roga","start":"21:26","end":"22:41","startHours":21.438474675837043,"endHours":22.681121485684088,"quality":"inauspicious"},{"name":"Udveg","start":"22:41","end":"23:55","startHours":22.681121485684088,"endHours":23.92376829553113,"quality":"inauspicious"},{"name":"Chala","start":"23:55","end":"01:10","startHours":23.92376829553113,"endHours":25.16641510537817,"quality":"neutral"},{"name":"Labha","start":"01:10","end":"02:25","startHours":25.16641510537817,"endHours":26.409061915225216,"quality":"auspicious"},{"name":"Amṛta","start":"02:25","end":"03:39","startHours":26.409061915225216,"endHours":27.65170872507226,"quality":"auspicious"},{"name":"Kāla","start":"03:39","end":"04:54","startHours":27.65170872507226,"endHours":28.894355534919303,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"04:54","end":"05:54","startHours":4.8943555349193035,"endHours":5.8943555349193035,"planetary_lord":"Mars"},{"name":"Hora 2","start":"05:54","end":"06:54","startHours":5.8943555349193035,"endHours":6.8943555349193035,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"06:54","end":"07:54","startHours":6.8943555349193035,"endHours":7.8943555349193035,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"07:54","end":"08:54","startHours":7.8943555349193035,"endHours":8.894355534919303,"planetary_lord":"Moon"},{"name":"Hora 5","start":"08:54","end":"09:54","startHours":8.894355534919303,"endHours":9.894355534919303,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"09:54","end":"10:54","startHours":9.894355534919303,"endHours":10.894355534919303,"planetary_lord":"Venus"},{"name":"Hora 7","start":"10:54","end":"11:54","startHours":10.894355534919303,"endHours":11.894355534919303,"planetary_lord":"Sun"},{"name":"Hora 8","start":"11:54","end":"12:54","startHours":11.894355534919303,"endHours":12.894355534919303,"planetary_lord":"Mars"},{"name":"Hora 9","start":"12:54","end":"13:54","startHours":12.894355534919303,"endHours":13.894355534919303,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"13:54","end":"14:54","startHours":13.894355534919303,"endHours":14.894355534919303,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"14:54","end":"15:54","startHours":14.894355534919303,"endHours":15.894355534919303,"planetary_lord":"Moon"},{"name":"Hora 12","start":"15:54","end":"16:54","startHours":15.894355534919303,"endHours":16.894355534919303,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"16:54","end":"17:54","startHours":16.894355534919303,"endHours":17.894355534919303,"planetary_lord":"Venus"},{"name":"Hora 14","start":"17:54","end":"18:54","startHours":17.894355534919303,"endHours":18.894355534919303,"planetary_lord":"Sun"},{"name":"Hora 15","start":"18:54","end":"19:54","startHours":18.894355534919303,"endHours":19.894355534919303,"planetary_lord":"Mars"},{"name":"Hora 16","start":"19:54","end":"20:54","startHours":19.894355534919303,"endHours":20.894355534919303,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"20:54","end":"21:54","startHours":20.894355534919303,"endHours":21.894355534919303,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"21:54","end":"22:54","startHours":21.894355534919303,"endHours":22.894355534919303,"planetary_lord":"Moon"},{"name":"Hora 19","start":"22:54","end":"23:54","startHours":22.894355534919303,"endHours":23.894355534919303,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"23:54","end":"00:54","startHours":23.894355534919303,"endHours":24.894355534919303,"planetary_lord":"Venus"},{"name":"Hora 21","start":"00:54","end":"01:54","startHours":24.894355534919303,"endHours":25.894355534919303,"planetary_lord":"Sun"},{"name":"Hora 22","start":"01:54","end":"02:54","startHours":25.894355534919303,"endHours":26.894355534919303,"planetary_lord":"Mars"},{"name":"Hora 23","start":"02:54","end":"03:54","startHours":26.894355534919303,"endHours":27.894355534919303,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"03:54","end":"04:54","startHours":27.894355534919303,"endHours":28.894355534919303,"planetary_lord":"Saturn"}],"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":["Vṛṣabha","Mithuna","Kanyā","Tulā","Dhanu","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Makara","Mīna"]},"dishaShool":"North (Uttara)","chandraVasa":"East","rahuVasa":"North","anandadiYoga":{"name":"Cara","quality":"Auspicious"},"tropicalRitu":"Varṣā (Monsoon) (tropical)","vedicRitu":"Grīṣma (Summer)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":15.343462669645216,"eotMinutes":-4.906897731867799,"ayanamsa":23.5961}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Śrāvaṇa","lunar_month_paksha_full":"Śrāvaṇa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Śrāvaṇa","lunar_month_amanta":"Śrāvaṇa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Karkaṭa (Āḍi)","ritu":"Varṣā (Monsoon)","display_summary":"Śrāvaṇa Śukla Ekādaśī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"pavitropana-ekadashi","name":"Pavitropanā Ekādaśī (Putradā)","name_sanskrit":"पवित्रोपना एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Confers son; pavitra (sacred thread) ceremony for Viṣṇu.","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Śrāvaṇa"},"precedence":4},{"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":[{"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":"chicago"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga August 11, 1981 CE · Chicago, USA · Vidhyamitra","description":"August 11, 1981 CE for Chicago, USA: Śukla Ekādaśī, sūryodaya 04:54, sūryāsta 18:57.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/chicago/1981-08-11","hreflang_alternates":{"en":"https://vidhyamitra.com/city/chicago/1981-08-11","sa":"https://sa.vidhyamitra.com/city/chicago/1981-08-11","hi":"https://hi.vidhyamitra.com/city/chicago/1981-08-11","x-default":"https://vidhyamitra.com/city/chicago/1981-08-11"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T21:33:42.285Z","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":"2026-06-01T21:33:42.285Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T21:33:42.285Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}