{"id":"vidhyamitra:city-day:phoenix:1998-01-20:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/phoenix/1998-01-20","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1998-01-20","date_display":"January 20, 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":1,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2450833.770833,"kali_year":5099,"ahargana":1862368.2708,"sun":{"sidereal_longitude":275.8784,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":179.6737,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":22,"name":"Saptamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Saptamī","elongation_degrees":263.7953,"elapsed_within_tithi_degrees":11.7953},"nakshatra":{"number":14,"name":"Citrā","pada":2,"moon_longitude":179.6737,"elapsed_within_degrees":6.3404},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":95.5521},"karana":{"half_tithi_index":43,"name":"Bava"},"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":1998,"month":1,"day":20,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2450833.770833,"ahargana":1862368.2708,"kali_year":5099,"ayanamsa_lahiri":23.8258,"grahas":{"sun":{"sidereal_longitude":275.94508500000006,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":177.376085,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"retrograde":false,"latitude":2.7006},"mars":{"sidereal_longitude":301.9730850000001,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":255.961685,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":302.573885,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false},"venus":{"sidereal_longitude":270.048085,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":true},"saturn":{"sidereal_longitude":350.757585,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":142.7667,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":322.7667,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","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":1998,"month":1,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2450833.770833,"kali_year":5099,"ahargana":1862368.2708,"sun":{"sidereal_longitude":275.8784,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":179.6737,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":22,"name":"Saptamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Saptamī","elongation_degrees":263.7953,"elapsed_within_tithi_degrees":11.7953},"nakshatra":{"number":14,"name":"Citrā","pada":2,"moon_longitude":179.6737,"elapsed_within_degrees":6.3404},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":95.5521},"karana":{"half_tithi_index":43,"name":"Bava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.701,"elongation":96.205},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.701,"opposition_distance":83.795}},"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":"07:31","sunsetLocal":"17:47","solarNoonLocal":"12:39","dayLengthHours":10.27069215635224,"dayLengthDisplay":"10 Hours 16 Mins 14 Secs","nightLengthDisplay":"13 Hours 43 Mins 46 Secs","moonriseLocal":"00:24","moonsetLocal":"11:46","rahuKala":{"name":"Rāhu Kāla","start":"15:13","end":"16:30","startHours":15.222011428041881,"endHours":16.50584794758591,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:05","end":"11:22","startHours":10.086665349865761,"endHours":11.37050186940979,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:39","end":"13:56","startHours":12.654338388953821,"endHours":13.93817490849785,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:55","end":"10:15","startHours":9.91548714725989,"endHours":10.25784355247163,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:57","end":"08:13","startHours":7.946937817292377,"endHours":8.22082294146177,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:19","end":"13:00","startHours":12.31198198374208,"endHours":12.996694794165563,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"06:09","end":"06:50","startHours":6.149566689930735,"endHours":6.834279500354218,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:40","end":"07:31","startHours":6.663101297748347,"endHours":7.5189923107777,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:22","end":"15:03","startHours":14.366120415012528,"endHours":15.05083322543601,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:35","end":"17:59","startHours":17.589684467129942,"endHours":17.98968446712994,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:47","end":"18:13","startHours":17.78968446712994,"endHours":18.21762997364462,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:32","end":"19:17","startHours":17.53968446712994,"endHours":19.28968446712994,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:19","end":"01:00","startHours":24.31198198374208,"endHours":24.996694794165563,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"07:31","end":"08:48","startHours":7.5189923107777,"endHours":8.80282883032173,"quality":"inauspicious"},{"name":"Udveg","start":"08:48","end":"10:05","startHours":8.80282883032173,"endHours":10.086665349865761,"quality":"inauspicious"},{"name":"Chala","start":"10:05","end":"11:22","startHours":10.086665349865761,"endHours":11.37050186940979,"quality":"neutral"},{"name":"Labha","start":"11:22","end":"12:39","startHours":11.37050186940979,"endHours":12.654338388953821,"quality":"auspicious"},{"name":"Amṛta","start":"12:39","end":"13:56","startHours":12.654338388953821,"endHours":13.93817490849785,"quality":"auspicious"},{"name":"Kāla","start":"13:56","end":"15:13","startHours":13.93817490849785,"endHours":15.222011428041881,"quality":"inauspicious"},{"name":"Śubha","start":"15:13","end":"16:30","startHours":15.222011428041881,"endHours":16.50584794758591,"quality":"auspicious"},{"name":"Roga","start":"16:30","end":"17:47","startHours":16.50584794758591,"endHours":17.78968446712994,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"17:47","end":"19:30","startHours":17.78968446712994,"endHours":19.505847947585913,"quality":"inauspicious"},{"name":"Śubha","start":"19:30","end":"21:13","startHours":19.505847947585913,"endHours":21.22201142804188,"quality":"auspicious"},{"name":"Roga","start":"21:13","end":"22:56","startHours":21.22201142804188,"endHours":22.93817490849785,"quality":"inauspicious"},{"name":"Udveg","start":"22:56","end":"00:39","startHours":22.93817490849785,"endHours":24.65433838895382,"quality":"inauspicious"},{"name":"Chala","start":"00:39","end":"02:22","startHours":24.65433838895382,"endHours":26.370501869409793,"quality":"neutral"},{"name":"Labha","start":"02:22","end":"04:05","startHours":26.370501869409793,"endHours":28.08666534986576,"quality":"auspicious"},{"name":"Amṛta","start":"04:05","end":"05:48","startHours":28.08666534986576,"endHours":29.80282883032173,"quality":"auspicious"},{"name":"Kāla","start":"05:48","end":"07:31","startHours":29.80282883032173,"endHours":31.5189923107777,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:31","end":"08:31","startHours":7.5189923107777,"endHours":8.518992310777701,"planetary_lord":"Mars"},{"name":"Hora 2","start":"08:31","end":"09:31","startHours":8.518992310777701,"endHours":9.518992310777701,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"09:31","end":"10:31","startHours":9.518992310777701,"endHours":10.518992310777701,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"10:31","end":"11:31","startHours":10.518992310777701,"endHours":11.518992310777701,"planetary_lord":"Moon"},{"name":"Hora 5","start":"11:31","end":"12:31","startHours":11.518992310777701,"endHours":12.518992310777701,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"12:31","end":"13:31","startHours":12.518992310777701,"endHours":13.518992310777701,"planetary_lord":"Venus"},{"name":"Hora 7","start":"13:31","end":"14:31","startHours":13.518992310777701,"endHours":14.518992310777701,"planetary_lord":"Sun"},{"name":"Hora 8","start":"14:31","end":"15:31","startHours":14.518992310777701,"endHours":15.518992310777701,"planetary_lord":"Mars"},{"name":"Hora 9","start":"15:31","end":"16:31","startHours":15.518992310777701,"endHours":16.5189923107777,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"16:31","end":"17:31","startHours":16.5189923107777,"endHours":17.5189923107777,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"17:31","end":"18:31","startHours":17.5189923107777,"endHours":18.5189923107777,"planetary_lord":"Moon"},{"name":"Hora 12","start":"18:31","end":"19:31","startHours":18.5189923107777,"endHours":19.5189923107777,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"19:31","end":"20:31","startHours":19.5189923107777,"endHours":20.5189923107777,"planetary_lord":"Venus"},{"name":"Hora 14","start":"20:31","end":"21:31","startHours":20.5189923107777,"endHours":21.5189923107777,"planetary_lord":"Sun"},{"name":"Hora 15","start":"21:31","end":"22:31","startHours":21.5189923107777,"endHours":22.5189923107777,"planetary_lord":"Mars"},{"name":"Hora 16","start":"22:31","end":"23:31","startHours":22.5189923107777,"endHours":23.5189923107777,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"23:31","end":"00:31","startHours":23.5189923107777,"endHours":24.5189923107777,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"00:31","end":"01:31","startHours":24.5189923107777,"endHours":25.5189923107777,"planetary_lord":"Moon"},{"name":"Hora 19","start":"01:31","end":"02:31","startHours":25.5189923107777,"endHours":26.5189923107777,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"02:31","end":"03:31","startHours":26.5189923107777,"endHours":27.5189923107777,"planetary_lord":"Venus"},{"name":"Hora 21","start":"03:31","end":"04:31","startHours":27.5189923107777,"endHours":28.5189923107777,"planetary_lord":"Sun"},{"name":"Hora 22","start":"04:31","end":"05:31","startHours":28.5189923107777,"endHours":29.5189923107777,"planetary_lord":"Mars"},{"name":"Hora 23","start":"05:31","end":"06:31","startHours":29.5189923107777,"endHours":30.5189923107777,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"06:31","end":"07:31","startHours":30.5189923107777,"endHours":31.5189923107777,"planetary_lord":"Saturn"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Maghā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Mithuna","Karka","Kanyā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Tulā","Dhanu","Makara"]},"dishaShool":"North (Uttara)","chandraVasa":"North-West","rahuVasa":"North","anandadiYoga":{"name":"Mausala","quality":"Inauspicious"},"tropicalRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-20.19637903947014,"eotMinutes":-10.9643033372293,"ayanamsa":23.8258}},"calendars":{"vikram_samvat":2055,"vikram_samvatsara":"Khara","saka_samvat":1920,"saka_samvatsara":"Bahudhānya","bengali_samvat":1405,"malayalam_era":1174,"nanakshahi_year":529,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Māgha","lunar_month_amanta":"Pauṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Kṛṣṇa Saptamī · Vikram 2055 Khara · Śaka 1920 Bahudhānya"},"festivals":[],"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":"phoenix"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga January 20, 1998 CE · Phoenix, USA · Vidhyamitra","description":"January 20, 1998 CE for Phoenix, USA: Kṛṣṇa Saptamī, sūryodaya 07:31, sūryāsta 17:47.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/phoenix/1998-01-20","hreflang_alternates":{"en":"https://vidhyamitra.com/city/phoenix/1998-01-20","sa":"https://sa.vidhyamitra.com/city/phoenix/1998-01-20","hi":"https://hi.vidhyamitra.com/city/phoenix/1998-01-20","x-default":"https://vidhyamitra.com/city/phoenix/1998-01-20"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T11:40:28.511Z","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":"2026-05-31T11:40:28.511Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T11:40:28.511Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}