{"id":"vidhyamitra:city-day:mathura:1997-12-15:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/mathura/1997-12-15","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1997-12-15","date_display":"December 15, 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":12,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2450797.770833,"kali_year":5099,"ahargana":1862332.2708,"sun":{"sidereal_longitude":238.8933,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":72.3569,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":17,"name":"Dvitīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvitīyā","elongation_degrees":193.4636,"elapsed_within_tithi_degrees":1.4636},"nakshatra":{"number":6,"name":"Ārdrā","pada":2,"moon_longitude":72.3569,"elapsed_within_degrees":5.6903},"yoga":{"number":24,"name":"Śukla","sum_longitude":311.2502},"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":1997,"month":12,"day":15,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2450797.770833,"ahargana":1862332.2708,"kali_year":5099,"ayanamsa_lahiri":23.8244,"grahas":{"sun":{"sidereal_longitude":239.27346,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":70.95396,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":2},"retrograde":false,"latitude":-4.287},"mars":{"sidereal_longitude":273.66826000000003,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":244.74906,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":true},"jupiter":{"sidereal_longitude":295.0915600000001,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":277.52765999999997,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":true},"saturn":{"sidereal_longitude":349.67106,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":144.6741,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":324.6741,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":2},"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":12,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2450797.770833,"kali_year":5099,"ahargana":1862332.2708,"sun":{"sidereal_longitude":238.8933,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":72.3569,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":17,"name":"Dvitīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvitīyā","elongation_degrees":193.4636,"elapsed_within_tithi_degrees":1.4636},"nakshatra":{"number":6,"name":"Ārdrā","pada":2,"moon_longitude":72.3569,"elapsed_within_degrees":5.6903},"yoga":{"number":24,"name":"Śukla","sum_longitude":311.2502},"karana":{"half_tithi_index":32,"name":"Taitila"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.287,"elongation":166.536},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.287,"opposition_distance":13.464}},"eclipse_window_40days":[]},"city":{"slug":"mathura","name":"Mathurā","lat":27.4924,"lon":77.6737,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"mathura","name":"Mathurā","lat":27.4924,"lon":77.6737,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"sunriseLocal":"07:03","sunsetLocal":"17:28","solarNoonLocal":"12:15","dayLengthHours":10.416381053763423,"dayLengthDisplay":"10 Hours 24 Mins 59 Secs","nightLengthDisplay":"13 Hours 35 Mins 01 Secs","moonriseLocal":"18:07","moonsetLocal":"07:57","rahuKala":{"name":"Rāhu Kāla","start":"08:21","end":"09:39","startHours":8.345978187612513,"endHours":9.64802581933294,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:57","end":"12:15","startHours":10.950073451053369,"endHours":12.252121082773797,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:33","end":"14:51","startHours":13.554168714494224,"endHours":14.856216346214651,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:28","end":"09:49","startHours":9.474419468436883,"endHours":9.821632170228998,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:29","end":"07:45","startHours":7.477946433132227,"endHours":7.755716594565919,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:54","end":"12:36","startHours":11.904908380981682,"endHours":12.599333784565912,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:39","end":"06:21","startHours":5.655079748723629,"endHours":6.349505152307857,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:11","end":"07:03","startHours":6.175898801411799,"endHours":7.043930555892085,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:59","end":"14:41","startHours":13.988184591734367,"endHours":14.682609995318595,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:16","end":"17:40","startHours":17.26031160965551,"endHours":17.66031160965551,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:28","end":"17:54","startHours":17.46031160965551,"endHours":17.89432748689565,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:13","end":"18:58","startHours":17.21031160965551,"endHours":18.96031160965551,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:54","end":"00:36","startHours":23.904908380981684,"endHours":24.59933378456591,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"07:03","end":"08:21","startHours":7.043930555892085,"endHours":8.345978187612513,"quality":"auspicious"},{"name":"Kāla","start":"08:21","end":"09:39","startHours":8.345978187612513,"endHours":9.64802581933294,"quality":"inauspicious"},{"name":"Śubha","start":"09:39","end":"10:57","startHours":9.64802581933294,"endHours":10.950073451053369,"quality":"auspicious"},{"name":"Roga","start":"10:57","end":"12:15","startHours":10.950073451053369,"endHours":12.252121082773797,"quality":"inauspicious"},{"name":"Udveg","start":"12:15","end":"13:33","startHours":12.252121082773797,"endHours":13.554168714494224,"quality":"inauspicious"},{"name":"Chala","start":"13:33","end":"14:51","startHours":13.554168714494224,"endHours":14.856216346214651,"quality":"neutral"},{"name":"Labha","start":"14:51","end":"16:09","startHours":14.856216346214651,"endHours":16.158263977935082,"quality":"auspicious"},{"name":"Amṛta","start":"16:09","end":"17:28","startHours":16.158263977935082,"endHours":17.46031160965551,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"17:28","end":"19:09","startHours":17.46031160965551,"endHours":19.158263977935082,"quality":"neutral"},{"name":"Labha","start":"19:09","end":"20:51","startHours":19.158263977935082,"endHours":20.85621634621465,"quality":"auspicious"},{"name":"Amṛta","start":"20:51","end":"22:33","startHours":20.85621634621465,"endHours":22.554168714494224,"quality":"auspicious"},{"name":"Kāla","start":"22:33","end":"00:15","startHours":22.554168714494224,"endHours":24.252121082773797,"quality":"inauspicious"},{"name":"Śubha","start":"00:15","end":"01:57","startHours":24.252121082773797,"endHours":25.95007345105337,"quality":"auspicious"},{"name":"Roga","start":"01:57","end":"03:39","startHours":25.95007345105337,"endHours":27.648025819332943,"quality":"inauspicious"},{"name":"Udveg","start":"03:39","end":"05:21","startHours":27.648025819332943,"endHours":29.345978187612513,"quality":"inauspicious"},{"name":"Chala","start":"05:21","end":"07:03","startHours":29.345978187612513,"endHours":31.043930555892086,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"07:03","end":"08:03","startHours":7.043930555892085,"endHours":8.043930555892086,"planetary_lord":"Moon"},{"name":"Hora 2","start":"08:03","end":"09:03","startHours":8.043930555892086,"endHours":9.043930555892086,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"09:03","end":"10:03","startHours":9.043930555892086,"endHours":10.043930555892086,"planetary_lord":"Venus"},{"name":"Hora 4","start":"10:03","end":"11:03","startHours":10.043930555892086,"endHours":11.043930555892086,"planetary_lord":"Sun"},{"name":"Hora 5","start":"11:03","end":"12:03","startHours":11.043930555892086,"endHours":12.043930555892086,"planetary_lord":"Mars"},{"name":"Hora 6","start":"12:03","end":"13:03","startHours":12.043930555892086,"endHours":13.043930555892086,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"13:03","end":"14:03","startHours":13.043930555892086,"endHours":14.043930555892086,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"14:03","end":"15:03","startHours":14.043930555892086,"endHours":15.043930555892086,"planetary_lord":"Moon"},{"name":"Hora 9","start":"15:03","end":"16:03","startHours":15.043930555892086,"endHours":16.043930555892086,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"16:03","end":"17:03","startHours":16.043930555892086,"endHours":17.043930555892086,"planetary_lord":"Venus"},{"name":"Hora 11","start":"17:03","end":"18:03","startHours":17.043930555892086,"endHours":18.043930555892086,"planetary_lord":"Sun"},{"name":"Hora 12","start":"18:03","end":"19:03","startHours":18.043930555892086,"endHours":19.043930555892086,"planetary_lord":"Mars"},{"name":"Hora 13","start":"19:03","end":"20:03","startHours":19.043930555892086,"endHours":20.043930555892086,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"20:03","end":"21:03","startHours":20.043930555892086,"endHours":21.043930555892086,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"21:03","end":"22:03","startHours":21.043930555892086,"endHours":22.043930555892086,"planetary_lord":"Moon"},{"name":"Hora 16","start":"22:03","end":"23:03","startHours":22.043930555892086,"endHours":23.043930555892086,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"23:03","end":"00:03","startHours":23.043930555892086,"endHours":24.043930555892086,"planetary_lord":"Venus"},{"name":"Hora 18","start":"00:03","end":"01:03","startHours":24.043930555892086,"endHours":25.043930555892086,"planetary_lord":"Sun"},{"name":"Hora 19","start":"01:03","end":"02:03","startHours":25.043930555892086,"endHours":26.043930555892086,"planetary_lord":"Mars"},{"name":"Hora 20","start":"02:03","end":"03:03","startHours":26.043930555892086,"endHours":27.043930555892086,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"03:03","end":"04:03","startHours":27.043930555892086,"endHours":28.043930555892086,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"04:03","end":"05:03","startHours":28.043930555892086,"endHours":29.043930555892086,"planetary_lord":"Moon"},{"name":"Hora 23","start":"05:03","end":"06:03","startHours":29.043930555892086,"endHours":30.043930555892086,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"06:03","end":"07:03","startHours":30.043930555892086,"endHours":31.043930555892086,"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","Mithuna","Siṃha","Vṛścika","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Karka","Kanyā","Tulā","Makara","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"South","rahuVasa":"North-East","anandadiYoga":{"name":"Mudgara","quality":"Inauspicious"},"drikRitu":"Hemanta (Pre-winter) (Drik)","vedicRitu":"Śarad (Autumn)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-23.25662152054362,"eotMinutes":4.177935033572184,"ayanamsa":23.8244}},"calendars":{"vikram_samvat":2054,"vikram_samvatsara":"Vikṛti","saka_samvat":1919,"saka_samvatsara":"Īśvara","bengali_samvat":1404,"malayalam_era":1173,"nanakshahi_year":528,"lunar_month":"Mārgaśīrṣa","lunar_month_paksha_full":"Mārgaśīrṣa Kṛṣṇa Pakṣa","solar_month":"Vṛścika (Kārttikai)","ritu":"Hemanta (Pre-winter)","display_summary":"Mārgaśīrṣa Kṛṣṇa Dvitīyā · Vikram 2054 Vikṛti · Śaka 1919 Īśvara"},"festivals":[{"id":"vrischika-sankranti","name":"Vṛścika Saṅkrānti","name_sanskrit":"वृश्चिक सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Scorpio.","vrata":false,"detection":{"sun_rashi":"Vṛścika"},"precedence":5}],"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":"mathura"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga December 15, 1997 CE · Mathurā · Vidhyamitra","description":"December 15, 1997 CE for Mathurā: Kṛṣṇa Dvitīyā, sūryodaya 07:03, sūryāsta 17:28.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/mathura/1997-12-15","hreflang_alternates":{"en":"https://vidhyamitra.com/city/mathura/1997-12-15","sa":"https://sa.vidhyamitra.com/city/mathura/1997-12-15","hi":"https://hi.vidhyamitra.com/city/mathura/1997-12-15","x-default":"https://vidhyamitra.com/city/mathura/1997-12-15"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T18:28:45.513Z","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":"2026-05-14T18:28:45.513Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T18:28:45.513Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}