{"id":"vidhyamitra:city-day:phoenix:1997-10-04:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/phoenix/1997-10-04","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1997-10-04","date_display":"October 4, 1997 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":1997,"month":10,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2450725.770833,"kali_year":5099,"ahargana":1862260.2708,"sun":{"sidereal_longitude":166.2966,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":194.4254,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":3,"name":"Tṛtīyā","paksha":"Śukla","full_name":"Śukla Tṛtīyā","elongation_degrees":28.1287,"elapsed_within_tithi_degrees":4.1287},"nakshatra":{"number":15,"name":"Svātī","pada":3,"moon_longitude":194.4254,"elapsed_within_degrees":7.7587},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":0.722},"karana":{"half_tithi_index":4,"name":"Taitila"},"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":1997,"month":10,"day":4,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2450725.770833,"ahargana":1862260.2708,"kali_year":5099,"ayanamsa_lahiri":23.8217,"grahas":{"sun":{"sidereal_longitude":167.03691100000003,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":3},"retrograde":false},"moon":{"sidereal_longitude":192.72561099999996,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":2},"retrograde":false,"latitude":3.2319},"mars":{"sidereal_longitude":219.789811,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":159.44441099999995,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":288.301011,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":true},"venus":{"sidereal_longitude":211.42511100000002,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":353.511511,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":3},"retrograde":true},"rahu":{"sidereal_longitude":148.489,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":328.489,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","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":1997,"month":10,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2450725.770833,"kali_year":5099,"ahargana":1862260.2708,"sun":{"sidereal_longitude":166.2966,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":194.4254,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":3,"name":"Tṛtīyā","paksha":"Śukla","full_name":"Śukla Tṛtīyā","elongation_degrees":28.1287,"elapsed_within_tithi_degrees":4.1287},"nakshatra":{"number":15,"name":"Svātī","pada":3,"moon_longitude":194.4254,"elapsed_within_degrees":7.7587},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":0.722},"karana":{"half_tithi_index":4,"name":"Taitila"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.232,"elongation":28.129},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.232,"opposition_distance":151.871}},"eclipse_window_40days":[]},"city":{"slug":"phoenix","name":"Phoenix, USA","lat":33.4484,"lon":-112.074,"tz_offset_hours":-7,"country":"US","tier":"diaspora"},"tier2":{"city":{"slug":"phoenix","name":"Phoenix, USA","lat":33.4484,"lon":-112.074,"tz_offset_hours":-7,"country":"US","tier":"diaspora"},"sunriseLocal":"06:24","sunsetLocal":"18:09","solarNoonLocal":"12:16","dayLengthHours":11.754250919033744,"dayLengthDisplay":"11 Hours 45 Mins 15 Secs","nightLengthDisplay":"12 Hours 14 Mins 45 Secs","moonriseLocal":"08:33","moonsetLocal":"19:25","rahuKala":{"name":"Rāhu Kāla","start":"09:20","end":"10:48","startHours":9.331419550446729,"endHours":10.800700915325946,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:44","end":"15:13","startHours":13.739263645084382,"endHours":15.2085450099636,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:24","end":"07:52","startHours":6.392856820688292,"endHours":7.86213818556751,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:08","end":"09:32","startHours":9.135515368462832,"endHours":9.527323732430624,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:53","end":"07:12","startHours":6.882617275648031,"endHours":7.196063966822265,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:53","end":"12:40","startHours":11.87817391623737,"endHours":12.661790644172955,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:50","end":"05:37","startHours":4.825623364817126,"endHours":5.609240092752708,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:25","end":"06:24","startHours":5.413335910768813,"endHours":6.392856820688292,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:14","end":"15:01","startHours":14.229024100044121,"endHours":15.012640827979704,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:57","end":"18:21","startHours":17.947107739722036,"endHours":18.347107739722034,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:09","end":"18:38","startHours":18.147107739722035,"endHours":18.636868194681774,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:54","end":"19:39","startHours":17.897107739722035,"endHours":19.647107739722035,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:53","end":"00:40","startHours":23.878173916237373,"endHours":24.661790644172953,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"06:24","end":"07:52","startHours":6.392856820688292,"endHours":7.86213818556751,"quality":"inauspicious"},{"name":"Śubha","start":"07:52","end":"09:20","startHours":7.86213818556751,"endHours":9.331419550446729,"quality":"auspicious"},{"name":"Roga","start":"09:20","end":"10:48","startHours":9.331419550446729,"endHours":10.800700915325946,"quality":"inauspicious"},{"name":"Udveg","start":"10:48","end":"12:16","startHours":10.800700915325946,"endHours":12.269982280205163,"quality":"inauspicious"},{"name":"Chala","start":"12:16","end":"13:44","startHours":12.269982280205163,"endHours":13.739263645084382,"quality":"neutral"},{"name":"Labha","start":"13:44","end":"15:13","startHours":13.739263645084382,"endHours":15.2085450099636,"quality":"auspicious"},{"name":"Amṛta","start":"15:13","end":"16:41","startHours":15.2085450099636,"endHours":16.677826374842816,"quality":"auspicious"},{"name":"Kāla","start":"16:41","end":"18:09","startHours":16.677826374842816,"endHours":18.147107739722035,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:09","end":"19:41","startHours":18.147107739722035,"endHours":19.677826374842816,"quality":"auspicious"},{"name":"Amṛta","start":"19:41","end":"21:13","startHours":19.677826374842816,"endHours":21.2085450099636,"quality":"auspicious"},{"name":"Kāla","start":"21:13","end":"22:44","startHours":21.2085450099636,"endHours":22.73926364508438,"quality":"inauspicious"},{"name":"Śubha","start":"22:44","end":"00:16","startHours":22.73926364508438,"endHours":24.269982280205163,"quality":"auspicious"},{"name":"Roga","start":"00:16","end":"01:48","startHours":24.269982280205163,"endHours":25.800700915325944,"quality":"inauspicious"},{"name":"Udveg","start":"01:48","end":"03:20","startHours":25.800700915325944,"endHours":27.331419550446725,"quality":"inauspicious"},{"name":"Chala","start":"03:20","end":"04:52","startHours":27.331419550446725,"endHours":28.86213818556751,"quality":"neutral"},{"name":"Labha","start":"04:52","end":"06:24","startHours":28.86213818556751,"endHours":30.39285682068829,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:24","end":"07:24","startHours":6.392856820688292,"endHours":7.392856820688292,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"07:24","end":"08:24","startHours":7.392856820688292,"endHours":8.39285682068829,"planetary_lord":"Moon"},{"name":"Hora 3","start":"08:24","end":"09:24","startHours":8.39285682068829,"endHours":9.39285682068829,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"09:24","end":"10:24","startHours":9.39285682068829,"endHours":10.39285682068829,"planetary_lord":"Venus"},{"name":"Hora 5","start":"10:24","end":"11:24","startHours":10.39285682068829,"endHours":11.39285682068829,"planetary_lord":"Sun"},{"name":"Hora 6","start":"11:24","end":"12:24","startHours":11.39285682068829,"endHours":12.39285682068829,"planetary_lord":"Mars"},{"name":"Hora 7","start":"12:24","end":"13:24","startHours":12.39285682068829,"endHours":13.39285682068829,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"13:24","end":"14:24","startHours":13.39285682068829,"endHours":14.39285682068829,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"14:24","end":"15:24","startHours":14.39285682068829,"endHours":15.39285682068829,"planetary_lord":"Moon"},{"name":"Hora 10","start":"15:24","end":"16:24","startHours":15.39285682068829,"endHours":16.39285682068829,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"16:24","end":"17:24","startHours":16.39285682068829,"endHours":17.39285682068829,"planetary_lord":"Venus"},{"name":"Hora 12","start":"17:24","end":"18:24","startHours":17.39285682068829,"endHours":18.39285682068829,"planetary_lord":"Sun"},{"name":"Hora 13","start":"18:24","end":"19:24","startHours":18.39285682068829,"endHours":19.39285682068829,"planetary_lord":"Mars"},{"name":"Hora 14","start":"19:24","end":"20:24","startHours":19.39285682068829,"endHours":20.39285682068829,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"20:24","end":"21:24","startHours":20.39285682068829,"endHours":21.39285682068829,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"21:24","end":"22:24","startHours":21.39285682068829,"endHours":22.39285682068829,"planetary_lord":"Moon"},{"name":"Hora 17","start":"22:24","end":"23:24","startHours":22.39285682068829,"endHours":23.39285682068829,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"23:24","end":"00:24","startHours":23.39285682068829,"endHours":24.39285682068829,"planetary_lord":"Venus"},{"name":"Hora 19","start":"00:24","end":"01:24","startHours":24.39285682068829,"endHours":25.39285682068829,"planetary_lord":"Sun"},{"name":"Hora 20","start":"01:24","end":"02:24","startHours":25.39285682068829,"endHours":26.39285682068829,"planetary_lord":"Mars"},{"name":"Hora 21","start":"02:24","end":"03:24","startHours":26.39285682068829,"endHours":27.39285682068829,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"03:24","end":"04:24","startHours":27.39285682068829,"endHours":28.39285682068829,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"04:24","end":"05:24","startHours":28.39285682068829,"endHours":29.39285682068829,"planetary_lord":"Moon"},{"name":"Hora 24","start":"05:24","end":"06:24","startHours":29.39285682068829,"endHours":30.39285682068829,"planetary_lord":"Mercury"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Punarvasu","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Uttara Phalgunī","Hasta","Citrā","Svātī","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Karka","Siṃha","Tulā","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Vṛścika","Makara","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"North","rahuVasa":"East","anandadiYoga":{"name":"Chatra","quality":"Auspicious"},"tropicalRitu":"Śarad (Autumn) (tropical)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-4.297042165641244,"eotMinutes":12.09706318769023,"ayanamsa":23.8217}},"calendars":{"vikram_samvat":2054,"vikram_samvatsara":"Vikṛti","saka_samvat":1919,"saka_samvatsara":"Īśvara","bengali_samvat":1404,"malayalam_era":1173,"nanakshahi_year":528,"lunar_month":"Āśvina","lunar_month_paksha_full":"Āśvina Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Āśvina","lunar_month_amanta":"Āśvina","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Kanyā (Puraṭṭāsi)","ritu":"Śarad (Autumn)","display_summary":"Āśvina Śukla Tṛtīyā · Vikram 2054 Vikṛti · Śaka 1919 Īśvara"},"festivals":[],"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":[]},"validity":{"eternal":false,"location_specific":"phoenix"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga October 4, 1997 CE · Phoenix, USA · Vidhyamitra","description":"October 4, 1997 CE for Phoenix, USA: Śukla Tṛtīyā, sūryodaya 06:24, sūryāsta 18:09.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/phoenix/1997-10-04","hreflang_alternates":{"en":"https://vidhyamitra.com/city/phoenix/1997-10-04","sa":"https://sa.vidhyamitra.com/city/phoenix/1997-10-04","hi":"https://hi.vidhyamitra.com/city/phoenix/1997-10-04","x-default":"https://vidhyamitra.com/city/phoenix/1997-10-04"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T12:12:41.192Z","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":"2026-05-31T12:12:41.192Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T12:12:41.192Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}