{"id":"vidhyamitra:city-day:chicago:2018-01-27:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/chicago/2018-01-27","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2018-01-27","date_display":"January 27, 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":1,"day":27,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2458145.770833,"kali_year":5119,"ahargana":1869680.2708,"sun":{"sidereal_longitude":282.8724,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":43.1307,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":120.2583,"elapsed_within_tithi_degrees":0.2583},"nakshatra":{"number":4,"name":"Rohiṇī","pada":1,"moon_longitude":43.1307,"elapsed_within_degrees":3.1307},"yoga":{"number":25,"name":"Brahma","sum_longitude":326.003},"karana":{"half_tithi_index":20,"name":"Vaṇija"},"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":1,"day":27,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2458145.770833,"ahargana":1869680.2708,"kali_year":5119,"ayanamsa_lahiri":24.1055,"grahas":{"sun":{"sidereal_longitude":282.93401199999994,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":false},"moon":{"sidereal_longitude":40.16961200000003,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":1},"retrograde":false,"latitude":-4.2844},"mars":{"sidereal_longitude":215.90531199999998,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":268.602712,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":206.374912,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":286.932412,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":250.06801199999995,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":115.3417,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":295.3417,"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":2018,"month":1,"day":27,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2458145.770833,"kali_year":5119,"ahargana":1869680.2708,"sun":{"sidereal_longitude":282.8724,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":43.1307,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":120.2583,"elapsed_within_tithi_degrees":0.2583},"nakshatra":{"number":4,"name":"Rohiṇī","pada":1,"moon_longitude":43.1307,"elapsed_within_degrees":3.1307},"yoga":{"number":25,"name":"Brahma","sum_longitude":326.003},"karana":{"half_tithi_index":20,"name":"Vaṇija"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.284,"elongation":120.258},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.284,"opposition_distance":59.742}},"eclipse_window_40days":[{"offset_days":20,"type":"solar","occurs":true,"moon_latitude":-0.855,"elongation":1.98}]},"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":"07:08","sunsetLocal":"16:58","solarNoonLocal":"12:03","dayLengthHours":9.835346538137351,"dayLengthDisplay":"9 Hours 50 Mins 07 Secs","nightLengthDisplay":"14 Hours 09 Mins 53 Secs","moonriseLocal":"12:28","moonsetLocal":"03:16","rahuKala":{"name":"Rāhu Kāla","start":"09:36","end":"10:50","startHours":9.595896790580314,"endHours":10.825315107847484,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:17","end":"14:31","startHours":13.28415174238182,"endHours":14.51357005964899,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:08","end":"08:22","startHours":7.137060156045976,"endHours":8.366478473313144,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:26","end":"09:46","startHours":9.431974348278025,"endHours":9.759819232882602,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:33","end":"07:49","startHours":7.546866261801699,"endHours":7.809142169485362,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:44","end":"12:23","startHours":11.726888540510073,"endHours":12.38257830971923,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:50","end":"06:29","startHours":5.825680617627663,"endHours":6.4813703868368195,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:19","end":"07:08","startHours":6.31744794453453,"endHours":7.137060156045976,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:42","end":"14:21","startHours":13.693957848137543,"endHours":14.349647617346701,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"16:46","end":"17:10","startHours":16.772406694183328,"endHours":17.172406694183326,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"16:58","end":"17:23","startHours":16.972406694183327,"endHours":17.38221279993905,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"16:43","end":"18:28","startHours":16.722406694183327,"endHours":18.472406694183327,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:44","end":"00:23","startHours":23.726888540510075,"endHours":24.38257830971923,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"07:08","end":"08:22","startHours":7.137060156045976,"endHours":8.366478473313144,"quality":"inauspicious"},{"name":"Śubha","start":"08:22","end":"09:36","startHours":8.366478473313144,"endHours":9.595896790580314,"quality":"auspicious"},{"name":"Roga","start":"09:36","end":"10:50","startHours":9.595896790580314,"endHours":10.825315107847484,"quality":"inauspicious"},{"name":"Udveg","start":"10:50","end":"12:03","startHours":10.825315107847484,"endHours":12.054733425114652,"quality":"inauspicious"},{"name":"Chala","start":"12:03","end":"13:17","startHours":12.054733425114652,"endHours":13.28415174238182,"quality":"neutral"},{"name":"Labha","start":"13:17","end":"14:31","startHours":13.28415174238182,"endHours":14.51357005964899,"quality":"auspicious"},{"name":"Amṛta","start":"14:31","end":"15:45","startHours":14.51357005964899,"endHours":15.74298837691616,"quality":"auspicious"},{"name":"Kāla","start":"15:45","end":"16:58","startHours":15.74298837691616,"endHours":16.972406694183327,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"16:58","end":"18:45","startHours":16.972406694183327,"endHours":18.74298837691616,"quality":"auspicious"},{"name":"Amṛta","start":"18:45","end":"20:31","startHours":18.74298837691616,"endHours":20.51357005964899,"quality":"auspicious"},{"name":"Kāla","start":"20:31","end":"22:17","startHours":20.51357005964899,"endHours":22.28415174238182,"quality":"inauspicious"},{"name":"Śubha","start":"22:17","end":"00:03","startHours":22.28415174238182,"endHours":24.05473342511465,"quality":"auspicious"},{"name":"Roga","start":"00:03","end":"01:50","startHours":24.05473342511465,"endHours":25.825315107847484,"quality":"inauspicious"},{"name":"Udveg","start":"01:50","end":"03:36","startHours":25.825315107847484,"endHours":27.595896790580312,"quality":"inauspicious"},{"name":"Chala","start":"03:36","end":"05:22","startHours":27.595896790580312,"endHours":29.366478473313144,"quality":"neutral"},{"name":"Labha","start":"05:22","end":"07:08","startHours":29.366478473313144,"endHours":31.137060156045976,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:08","end":"08:08","startHours":7.137060156045976,"endHours":8.137060156045976,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"08:08","end":"09:08","startHours":8.137060156045976,"endHours":9.137060156045976,"planetary_lord":"Moon"},{"name":"Hora 3","start":"09:08","end":"10:08","startHours":9.137060156045976,"endHours":10.137060156045976,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"10:08","end":"11:08","startHours":10.137060156045976,"endHours":11.137060156045976,"planetary_lord":"Venus"},{"name":"Hora 5","start":"11:08","end":"12:08","startHours":11.137060156045976,"endHours":12.137060156045976,"planetary_lord":"Sun"},{"name":"Hora 6","start":"12:08","end":"13:08","startHours":12.137060156045976,"endHours":13.137060156045976,"planetary_lord":"Mars"},{"name":"Hora 7","start":"13:08","end":"14:08","startHours":13.137060156045976,"endHours":14.137060156045976,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"14:08","end":"15:08","startHours":14.137060156045976,"endHours":15.137060156045976,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"15:08","end":"16:08","startHours":15.137060156045976,"endHours":16.137060156045976,"planetary_lord":"Moon"},{"name":"Hora 10","start":"16:08","end":"17:08","startHours":16.137060156045976,"endHours":17.137060156045976,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"17:08","end":"18:08","startHours":17.137060156045976,"endHours":18.137060156045976,"planetary_lord":"Venus"},{"name":"Hora 12","start":"18:08","end":"19:08","startHours":18.137060156045976,"endHours":19.137060156045976,"planetary_lord":"Sun"},{"name":"Hora 13","start":"19:08","end":"20:08","startHours":19.137060156045976,"endHours":20.137060156045976,"planetary_lord":"Mars"},{"name":"Hora 14","start":"20:08","end":"21:08","startHours":20.137060156045976,"endHours":21.137060156045976,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"21:08","end":"22:08","startHours":21.137060156045976,"endHours":22.137060156045976,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"22:08","end":"23:08","startHours":22.137060156045976,"endHours":23.137060156045976,"planetary_lord":"Moon"},{"name":"Hora 17","start":"23:08","end":"00:08","startHours":23.137060156045976,"endHours":24.137060156045976,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"00:08","end":"01:08","startHours":24.137060156045976,"endHours":25.137060156045976,"planetary_lord":"Venus"},{"name":"Hora 19","start":"01:08","end":"02:08","startHours":25.137060156045976,"endHours":26.137060156045976,"planetary_lord":"Sun"},{"name":"Hora 20","start":"02:08","end":"03:08","startHours":26.137060156045976,"endHours":27.137060156045976,"planetary_lord":"Mars"},{"name":"Hora 21","start":"03:08","end":"04:08","startHours":27.137060156045976,"endHours":28.137060156045976,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"04:08","end":"05:08","startHours":28.137060156045976,"endHours":29.137060156045976,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"05:08","end":"06:08","startHours":29.137060156045976,"endHours":30.137060156045976,"planetary_lord":"Moon"},{"name":"Hora 24","start":"06:08","end":"07:08","startHours":30.137060156045976,"endHours":31.137060156045976,"planetary_lord":"Mercury"}],"taraBala":{"favorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Citrā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Karka","Tulā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Siṃha","Kanyā","Dhanu","Makara"]},"dishaShool":"East (Pūrva)","chandraVasa":"South-East","rahuVasa":"East","anandadiYoga":{"name":"Dhātṛ","quality":"Auspicious"},"drikRitu":"Śiśira (Winter) (Drik)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-18.510480902879,"eotMinutes":-12.76480550687915,"ayanamsa":24.1055}},"calendars":{"vikram_samvat":2075,"vikram_samvatsara":"Virodhakṛt","saka_samvat":1940,"saka_samvatsara":"Vilambī","bengali_samvat":1425,"malayalam_era":1194,"nanakshahi_year":549,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Śukla Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Śukla Ekādaśī · Vikram 2075 Virodhakṛt · Śaka 1940 Vilambī"},"festivals":[{"id":"makara-sankranti","name":"Makara Saṅkrānti (Uttarāyaṇa)","name_sanskrit":"मकर सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Capricorn; Uttarāyaṇa (north-going) begins. Bhīṣma's chosen mahaprasthāna time.","vrata":true,"detection":{"sun_rashi":"Makara"},"precedence":1,"sources":["Mahābhārata Bhīṣma-Stuti","Sūrya-Siddhānta"]},{"id":"pongal","name":"Pongal / Thai Pongal","name_sanskrit":"पोङ्गल","tradition":"Regional","associated_deity":"Sūrya Bhagavān","significance":"Tamil 4-day harvest festival; coincides with Makara Saṅkrānti.","vrata":false,"detection":{"sun_rashi":"Makara"},"precedence":2},{"id":"jaya-ekadashi","name":"Jayā Ekādaśī","name_sanskrit":"जया एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Removes pretatva (ghost-state); grants victory.","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Māgha"},"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":"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":[{"historical_date":"-3226-07-09","event":"Bhagavān Krishna's birth at Mathurā","chart_id":"krishna","shared_marker":"same Rohiṇī","url":"/day/-3226-07-09","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 January 27, 2018 CE · Chicago, USA · Vidhyamitra","description":"January 27, 2018 CE for Chicago, USA: Śukla Ekādaśī, sūryodaya 07:08, sūryāsta 16:58.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/chicago/2018-01-27","hreflang_alternates":{"en":"https://vidhyamitra.com/city/chicago/2018-01-27","sa":"https://sa.vidhyamitra.com/city/chicago/2018-01-27","hi":"https://hi.vidhyamitra.com/city/chicago/2018-01-27","x-default":"https://vidhyamitra.com/city/chicago/2018-01-27"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-15T14:20:30.411Z","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":"2026-05-15T14:20:30.411Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-15T14:20:30.411Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}