{"id":"vidhyamitra:city-day:phoenix:1998-04-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/phoenix/1998-04-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1998-04-13","date_display":"April 13, 1998 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":1998,"month":4,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2450916.770833,"kali_year":5099,"ahargana":1862451.2708,"sun":{"sidereal_longitude":359.2328,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":193.1467,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":17,"name":"Dvitīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvitīyā","elongation_degrees":193.9139,"elapsed_within_tithi_degrees":1.9139},"nakshatra":{"number":15,"name":"Svātī","pada":2,"moon_longitude":193.1467,"elapsed_within_degrees":6.48},"yoga":{"number":15,"name":"Vajra","sum_longitude":192.3794},"karana":{"half_tithi_index":32,"name":"Taitila"},"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":1998,"month":4,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2450916.770833,"ahargana":1862451.2708,"kali_year":5099,"ayanamsa_lahiri":23.829,"grahas":{"sun":{"sidereal_longitude":359.091513,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"moon":{"sidereal_longitude":191.15211299999999,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":2},"retrograde":false,"latitude":3.6749},"mars":{"sidereal_longitude":6.217812999999978,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":348.371813,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":1},"retrograde":true},"jupiter":{"sidereal_longitude":322.00951299999997,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":313.365813,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":359.449813,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":138.3689,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":318.3689,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","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":1998,"month":4,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2450916.770833,"kali_year":5099,"ahargana":1862451.2708,"sun":{"sidereal_longitude":359.2328,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":193.1467,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":17,"name":"Dvitīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvitīyā","elongation_degrees":193.9139,"elapsed_within_tithi_degrees":1.9139},"nakshatra":{"number":15,"name":"Svātī","pada":2,"moon_longitude":193.1467,"elapsed_within_degrees":6.48},"yoga":{"number":15,"name":"Vajra","sum_longitude":192.3794},"karana":{"half_tithi_index":32,"name":"Taitila"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.675,"elongation":166.086},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.675,"opposition_distance":13.914}},"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":"06:01","sunsetLocal":"18:57","solarNoonLocal":"12:29","dayLengthHours":12.928268262766466,"dayLengthDisplay":"12 Hours 55 Mins 42 Secs","nightLengthDisplay":"11 Hours 04 Mins 18 Secs","moonriseLocal":"19:50","moonsetLocal":"06:45","rahuKala":{"name":"Rāhu Kāla","start":"07:38","end":"09:15","startHours":7.636329581957646,"endHours":9.252363114803455,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:52","end":"12:29","startHours":10.868396647649263,"endHours":12.484430180495071,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:06","end":"15:43","startHours":14.10046371334088,"endHours":15.716497246186687,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:02","end":"09:28","startHours":9.03689197709068,"endHours":9.46783425251623,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:34","end":"06:54","startHours":6.558973893393774,"endHours":6.903727713734213,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:03","end":"12:55","startHours":12.053487905069522,"endHours":12.91537245592062,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:18","end":"05:10","startHours":4.296526947409642,"endHours":5.15841149826074,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:57","end":"06:01","startHours":4.942940360547966,"endHours":6.020296049111838,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:38","end":"15:30","startHours":14.639141557622816,"endHours":15.501026108473914,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:45","end":"19:09","startHours":18.748564311878305,"endHours":19.148564311878303,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:57","end":"19:29","startHours":18.948564311878304,"endHours":19.48724215616024,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:42","end":"20:27","startHours":18.698564311878304,"endHours":20.448564311878304,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:03","end":"00:55","startHours":24.053487905069524,"endHours":24.915372455920618,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"06:01","end":"07:38","startHours":6.020296049111838,"endHours":7.636329581957646,"quality":"auspicious"},{"name":"Kāla","start":"07:38","end":"09:15","startHours":7.636329581957646,"endHours":9.252363114803455,"quality":"inauspicious"},{"name":"Śubha","start":"09:15","end":"10:52","startHours":9.252363114803455,"endHours":10.868396647649263,"quality":"auspicious"},{"name":"Roga","start":"10:52","end":"12:29","startHours":10.868396647649263,"endHours":12.484430180495071,"quality":"inauspicious"},{"name":"Udveg","start":"12:29","end":"14:06","startHours":12.484430180495071,"endHours":14.10046371334088,"quality":"inauspicious"},{"name":"Chala","start":"14:06","end":"15:43","startHours":14.10046371334088,"endHours":15.716497246186687,"quality":"neutral"},{"name":"Labha","start":"15:43","end":"17:20","startHours":15.716497246186687,"endHours":17.332530779032496,"quality":"auspicious"},{"name":"Amṛta","start":"17:20","end":"18:57","startHours":17.332530779032496,"endHours":18.948564311878304,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"18:57","end":"20:20","startHours":18.948564311878304,"endHours":20.332530779032496,"quality":"neutral"},{"name":"Labha","start":"20:20","end":"21:43","startHours":20.332530779032496,"endHours":21.716497246186687,"quality":"auspicious"},{"name":"Amṛta","start":"21:43","end":"23:06","startHours":21.716497246186687,"endHours":23.10046371334088,"quality":"auspicious"},{"name":"Kāla","start":"23:06","end":"00:29","startHours":23.10046371334088,"endHours":24.48443018049507,"quality":"inauspicious"},{"name":"Śubha","start":"00:29","end":"01:52","startHours":24.48443018049507,"endHours":25.868396647649263,"quality":"auspicious"},{"name":"Roga","start":"01:52","end":"03:15","startHours":25.868396647649263,"endHours":27.252363114803455,"quality":"inauspicious"},{"name":"Udveg","start":"03:15","end":"04:38","startHours":27.252363114803455,"endHours":28.636329581957646,"quality":"inauspicious"},{"name":"Chala","start":"04:38","end":"06:01","startHours":28.636329581957646,"endHours":30.02029604911184,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"06:01","end":"07:01","startHours":6.020296049111838,"endHours":7.020296049111838,"planetary_lord":"Moon"},{"name":"Hora 2","start":"07:01","end":"08:01","startHours":7.020296049111838,"endHours":8.020296049111838,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"08:01","end":"09:01","startHours":8.020296049111838,"endHours":9.020296049111838,"planetary_lord":"Venus"},{"name":"Hora 4","start":"09:01","end":"10:01","startHours":9.020296049111838,"endHours":10.020296049111838,"planetary_lord":"Sun"},{"name":"Hora 5","start":"10:01","end":"11:01","startHours":10.020296049111838,"endHours":11.020296049111838,"planetary_lord":"Mars"},{"name":"Hora 6","start":"11:01","end":"12:01","startHours":11.020296049111838,"endHours":12.020296049111838,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"12:01","end":"13:01","startHours":12.020296049111838,"endHours":13.020296049111838,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"13:01","end":"14:01","startHours":13.020296049111838,"endHours":14.020296049111838,"planetary_lord":"Moon"},{"name":"Hora 9","start":"14:01","end":"15:01","startHours":14.020296049111838,"endHours":15.020296049111838,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"15:01","end":"16:01","startHours":15.020296049111838,"endHours":16.02029604911184,"planetary_lord":"Venus"},{"name":"Hora 11","start":"16:01","end":"17:01","startHours":16.02029604911184,"endHours":17.02029604911184,"planetary_lord":"Sun"},{"name":"Hora 12","start":"17:01","end":"18:01","startHours":17.02029604911184,"endHours":18.02029604911184,"planetary_lord":"Mars"},{"name":"Hora 13","start":"18:01","end":"19:01","startHours":18.02029604911184,"endHours":19.02029604911184,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"19:01","end":"20:01","startHours":19.02029604911184,"endHours":20.02029604911184,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"20:01","end":"21:01","startHours":20.02029604911184,"endHours":21.02029604911184,"planetary_lord":"Moon"},{"name":"Hora 16","start":"21:01","end":"22:01","startHours":21.02029604911184,"endHours":22.02029604911184,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"22:01","end":"23:01","startHours":22.02029604911184,"endHours":23.02029604911184,"planetary_lord":"Venus"},{"name":"Hora 18","start":"23:01","end":"00:01","startHours":23.02029604911184,"endHours":24.02029604911184,"planetary_lord":"Sun"},{"name":"Hora 19","start":"00:01","end":"01:01","startHours":24.02029604911184,"endHours":25.02029604911184,"planetary_lord":"Mars"},{"name":"Hora 20","start":"01:01","end":"02:01","startHours":25.02029604911184,"endHours":26.02029604911184,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"02:01","end":"03:01","startHours":26.02029604911184,"endHours":27.02029604911184,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"03:01","end":"04:01","startHours":27.02029604911184,"endHours":28.02029604911184,"planetary_lord":"Moon"},{"name":"Hora 23","start":"04:01","end":"05:01","startHours":28.02029604911184,"endHours":29.02029604911184,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"05:01","end":"06:01","startHours":29.02029604911184,"endHours":30.02029604911184,"planetary_lord":"Venus"}],"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":"North-East","anandadiYoga":{"name":"Siddhi","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring) (tropical)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":8.910903228062644,"eotMinutes":-0.7698108297043191,"ayanamsa":23.829}},"calendars":{"vikram_samvat":2055,"vikram_samvatsara":"Khara","saka_samvat":1920,"saka_samvatsara":"Bahudhānya","bengali_samvat":1405,"malayalam_era":1174,"nanakshahi_year":529,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Vaiśākha","lunar_month_amanta":"Caitra","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mīna (Paṅkuṇi)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha Kṛṣṇa Dvitīyā · Vikram 2055 Khara · Śaka 1920 Bahudhānya"},"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":[]},"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 April 13, 1998 CE · Phoenix, USA · Vidhyamitra","description":"April 13, 1998 CE for Phoenix, USA: Kṛṣṇa Dvitīyā, sūryodaya 06:01, sūryāsta 18:57.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/phoenix/1998-04-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/phoenix/1998-04-13","sa":"https://sa.vidhyamitra.com/city/phoenix/1998-04-13","hi":"https://hi.vidhyamitra.com/city/phoenix/1998-04-13","x-default":"https://vidhyamitra.com/city/phoenix/1998-04-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T13:05:46.290Z","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":"2026-06-02T13:05:46.290Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T13:05:46.290Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}