{"id":"vidhyamitra:city-day:perth:2018-12-19:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2018-12-19","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2018-12-19","date_display":"December 19, 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":12,"day":19,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2458471.770833,"kali_year":5120,"ahargana":1870006.2708,"sun":{"sidereal_longitude":242.5534,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":15.028,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":132.4746,"elapsed_within_tithi_degrees":0.4746},"nakshatra":{"number":2,"name":"Bharaṇī","pada":1,"moon_longitude":15.028,"elapsed_within_degrees":1.6947},"yoga":{"number":20,"name":"Śiva","sum_longitude":257.5814},"karana":{"half_tithi_index":22,"name":"Bava"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"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":12,"day":19,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2458471.770833,"ahargana":1870006.2708,"kali_year":5120,"ayanamsa_lahiri":24.1179,"grahas":{"sun":{"sidereal_longitude":242.95175700000004,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"moon":{"sidereal_longitude":14.287356999999986,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":1},"retrograde":false,"latitude":-4.4668},"mars":{"sidereal_longitude":326.87295700000004,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":221.72085700000002,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":224.82885699999997,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":197.16155700000002,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":255.63475700000004,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":98.0687,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":278.0687,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","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":2018,"month":12,"day":19,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2458471.770833,"kali_year":5120,"ahargana":1870006.2708,"sun":{"sidereal_longitude":242.5534,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":15.028,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":132.4746,"elapsed_within_tithi_degrees":0.4746},"nakshatra":{"number":2,"name":"Bharaṇī","pada":1,"moon_longitude":15.028,"elapsed_within_degrees":1.6947},"yoga":{"number":20,"name":"Śiva","sum_longitude":257.5814},"karana":{"half_tithi_index":22,"name":"Bava"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.467,"elongation":132.475},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.467,"opposition_distance":47.525}},"eclipse_window_40days":[{"offset_days":18,"type":"solar","occurs":true,"moon_latitude":1.158,"elongation":1.13}]},"city":{"slug":"perth","name":"Perth, Australia","lat":-31.9505,"lon":115.8605,"tz_offset_hours":8,"country":"AU","tier":"diaspora"},"tier2":{"city":{"slug":"perth","name":"Perth, Australia","lat":-31.9505,"lon":115.8605,"tz_offset_hours":8,"country":"AU","tier":"diaspora"},"sunriseLocal":"05:07","sunsetLocal":"19:21","solarNoonLocal":"12:14","dayLengthHours":14.236613327402784,"dayLengthDisplay":"14 Hours 14 Mins 12 Secs","nightLengthDisplay":"9 Hours 45 Mins 48 Secs","moonriseLocal":"15:33","moonsetLocal":"02:26","rahuKala":{"name":"Rāhu Kāla","start":"12:14","end":"14:01","startHours":12.237292827264522,"endHours":14.016869493189871,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"06:54","end":"08:41","startHours":6.898562829488479,"endHours":8.678139495413827,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:27","end":"12:14","startHours":10.457716161339174,"endHours":12.237292827264522,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:26","end":"08:55","startHours":8.44086260662378,"endHours":8.915416384203873,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:43","end":"06:06","startHours":5.712178385538246,"endHours":6.091821407602321,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:46","end":"12:43","startHours":11.762739049684429,"endHours":12.711846604844615,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:13","end":"04:10","startHours":3.2207710532427596,"endHours":4.169878608402945,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"03:56","end":"05:07","startHours":3.9326017196128986,"endHours":5.118986163563131,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:37","end":"15:34","startHours":14.610061715164987,"endHours":15.559169270325173,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:09","end":"19:33","startHours":19.155599490965916,"endHours":19.555599490965914,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:21","end":"19:57","startHours":19.355599490965915,"endHours":19.94879171294103,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:06","end":"20:51","startHours":19.105599490965915,"endHours":20.855599490965915,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:46","end":"00:43","startHours":23.76273904968443,"endHours":24.711846604844613,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"05:07","end":"06:54","startHours":5.118986163563131,"endHours":6.898562829488479,"quality":"auspicious"},{"name":"Amṛta","start":"06:54","end":"08:41","startHours":6.898562829488479,"endHours":8.678139495413827,"quality":"auspicious"},{"name":"Kāla","start":"08:41","end":"10:27","startHours":8.678139495413827,"endHours":10.457716161339174,"quality":"inauspicious"},{"name":"Śubha","start":"10:27","end":"12:14","startHours":10.457716161339174,"endHours":12.237292827264522,"quality":"auspicious"},{"name":"Roga","start":"12:14","end":"14:01","startHours":12.237292827264522,"endHours":14.016869493189871,"quality":"inauspicious"},{"name":"Udveg","start":"14:01","end":"15:48","startHours":14.016869493189871,"endHours":15.796446159115218,"quality":"inauspicious"},{"name":"Chala","start":"15:48","end":"17:35","startHours":15.796446159115218,"endHours":17.576022825040567,"quality":"neutral"},{"name":"Labha","start":"17:35","end":"19:21","startHours":17.576022825040567,"endHours":19.355599490965915,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"19:21","end":"20:35","startHours":19.355599490965915,"endHours":20.576022825040567,"quality":"inauspicious"},{"name":"Chala","start":"20:35","end":"21:48","startHours":20.576022825040567,"endHours":21.79644615911522,"quality":"neutral"},{"name":"Labha","start":"21:48","end":"23:01","startHours":21.79644615911522,"endHours":23.016869493189873,"quality":"auspicious"},{"name":"Amṛta","start":"23:01","end":"00:14","startHours":23.016869493189873,"endHours":24.237292827264522,"quality":"auspicious"},{"name":"Kāla","start":"00:14","end":"01:27","startHours":24.237292827264522,"endHours":25.457716161339174,"quality":"inauspicious"},{"name":"Śubha","start":"01:27","end":"02:41","startHours":25.457716161339174,"endHours":26.678139495413827,"quality":"auspicious"},{"name":"Roga","start":"02:41","end":"03:54","startHours":26.678139495413827,"endHours":27.898562829488476,"quality":"inauspicious"},{"name":"Udveg","start":"03:54","end":"05:07","startHours":27.898562829488476,"endHours":29.11898616356313,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:07","end":"06:07","startHours":5.118986163563131,"endHours":6.118986163563131,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"06:07","end":"07:07","startHours":6.118986163563131,"endHours":7.118986163563131,"planetary_lord":"Venus"},{"name":"Hora 3","start":"07:07","end":"08:07","startHours":7.118986163563131,"endHours":8.11898616356313,"planetary_lord":"Sun"},{"name":"Hora 4","start":"08:07","end":"09:07","startHours":8.11898616356313,"endHours":9.11898616356313,"planetary_lord":"Mars"},{"name":"Hora 5","start":"09:07","end":"10:07","startHours":9.11898616356313,"endHours":10.11898616356313,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"10:07","end":"11:07","startHours":10.11898616356313,"endHours":11.11898616356313,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"11:07","end":"12:07","startHours":11.11898616356313,"endHours":12.11898616356313,"planetary_lord":"Moon"},{"name":"Hora 8","start":"12:07","end":"13:07","startHours":12.11898616356313,"endHours":13.11898616356313,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"13:07","end":"14:07","startHours":13.11898616356313,"endHours":14.11898616356313,"planetary_lord":"Venus"},{"name":"Hora 10","start":"14:07","end":"15:07","startHours":14.11898616356313,"endHours":15.11898616356313,"planetary_lord":"Sun"},{"name":"Hora 11","start":"15:07","end":"16:07","startHours":15.11898616356313,"endHours":16.11898616356313,"planetary_lord":"Mars"},{"name":"Hora 12","start":"16:07","end":"17:07","startHours":16.11898616356313,"endHours":17.11898616356313,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"17:07","end":"18:07","startHours":17.11898616356313,"endHours":18.11898616356313,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"18:07","end":"19:07","startHours":18.11898616356313,"endHours":19.11898616356313,"planetary_lord":"Moon"},{"name":"Hora 15","start":"19:07","end":"20:07","startHours":19.11898616356313,"endHours":20.11898616356313,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"20:07","end":"21:07","startHours":20.11898616356313,"endHours":21.11898616356313,"planetary_lord":"Venus"},{"name":"Hora 17","start":"21:07","end":"22:07","startHours":21.11898616356313,"endHours":22.11898616356313,"planetary_lord":"Sun"},{"name":"Hora 18","start":"22:07","end":"23:07","startHours":22.11898616356313,"endHours":23.11898616356313,"planetary_lord":"Mars"},{"name":"Hora 19","start":"23:07","end":"00:07","startHours":23.11898616356313,"endHours":24.11898616356313,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"00:07","end":"01:07","startHours":24.11898616356313,"endHours":25.11898616356313,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"01:07","end":"02:07","startHours":25.11898616356313,"endHours":26.11898616356313,"planetary_lord":"Moon"},{"name":"Hora 22","start":"02:07","end":"03:07","startHours":26.11898616356313,"endHours":27.11898616356313,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"03:07","end":"04:07","startHours":27.11898616356313,"endHours":28.11898616356313,"planetary_lord":"Venus"},{"name":"Hora 24","start":"04:07","end":"05:07","startHours":28.11898616356313,"endHours":29.11898616356313,"planetary_lord":"Sun"}],"taraBala":{"favorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Uttara Phalgunī","Hasta","Citrā","Svātī","Viśākhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Mithuna","Kanyā","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Karka","Siṃha","Vṛścika","Dhanu","Mīna"]},"dishaShool":"North (Uttara)","chandraVasa":"East","rahuVasa":"South-West","anandadiYoga":{"name":"Padma","quality":"Auspicious"},"drikRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-23.40402713703293,"eotMinutes":2.3204303641286352,"ayanamsa":24.1179}},"calendars":{"vikram_samvat":2075,"vikram_samvatsara":"Virodhakṛt","saka_samvat":1940,"saka_samvatsara":"Vilambī","bengali_samvat":1425,"malayalam_era":1194,"nanakshahi_year":549,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Śukla Pakṣa","solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Śukla Dvādaśī · Vikram 2075 Virodhakṛt · Śaka 1940 Vilambī"},"festivals":[{"id":"lohri","name":"Lohri","name_sanskrit":"लोहड़ी","tradition":"Regional","significance":"Punjab harvest festival; eve of Makara Saṅkrānti. (Approximated as 13/14 January annually; correct via Sun in Dhanu/Makara cusp.)","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":4},{"id":"dhanu-sankranti","name":"Dhanu Saṅkrānti","name_sanskrit":"धनु सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Sagittarius; Dhanu-māsa (Khara-māsa).","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":5}],"todays_walk":{"walk":{"id":"budha-walk","name":"Budha Walk","name_sanskrit":"बुध यात्रा","type":"graha","description":"Discrimination + BG 2.41 (vyavasāyātmikā buddhi).","step_count":6,"url":"/walk/budha-walk"},"reason":"Budhavāra (Wednesday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"perth"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga December 19, 2018 CE · Perth, Australia · Vidhyamitra","description":"December 19, 2018 CE for Perth, Australia: Śukla Dvādaśī, sūryodaya 05:07, sūryāsta 19:21.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2018-12-19","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2018-12-19","sa":"https://sa.vidhyamitra.com/city/perth/2018-12-19","hi":"https://hi.vidhyamitra.com/city/perth/2018-12-19","x-default":"https://vidhyamitra.com/city/perth/2018-12-19"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-15T20:27:57.092Z","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":"2026-05-15T20:27:57.092Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-15T20:27:57.092Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}