{"id":"vidhyamitra:city-day:perth:2108-12-16:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2108-12-16","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2108-12-16","date_display":"December 16, 2108 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":2108,"month":12,"day":16,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2491340.770833,"kali_year":5210,"ahargana":1902875.2708,"sun":{"sidereal_longitude":238.1527,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":29.9075,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":151.7548,"elapsed_within_tithi_degrees":7.7548},"nakshatra":{"number":3,"name":"Kṛttikā","pada":1,"moon_longitude":29.9075,"elapsed_within_degrees":3.2408},"yoga":{"number":21,"name":"Siddha","sum_longitude":268.0601},"karana":{"half_tithi_index":25,"name":"Taitila"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"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":2108,"month":12,"day":16,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2491340.770833,"ahargana":1902875.2708,"kali_year":5210,"ayanamsa_lahiri":25.375,"grahas":{"sun":{"sidereal_longitude":238.80211899999995,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":31.40101900000002,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":false,"latitude":-3.6112},"mars":{"sidereal_longitude":276.229019,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":257.85151900000005,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":86.49881900000003,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":2},"retrograde":true},"venus":{"sidereal_longitude":219.569619,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":270.9283190000001,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":156.5109,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":336.5109,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara 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":2108,"month":12,"day":16,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2491340.770833,"kali_year":5210,"ahargana":1902875.2708,"sun":{"sidereal_longitude":238.1527,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":29.9075,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":151.7548,"elapsed_within_tithi_degrees":7.7548},"nakshatra":{"number":3,"name":"Kṛttikā","pada":1,"moon_longitude":29.9075,"elapsed_within_degrees":3.2408},"yoga":{"number":21,"name":"Siddha","sum_longitude":268.0601},"karana":{"half_tithi_index":25,"name":"Taitila"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.611,"elongation":151.755},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.611,"opposition_distance":28.245}},"eclipse_window_40days":[]},"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":"05:06","sunsetLocal":"19:20","solarNoonLocal":"12:13","dayLengthHours":14.226654594690999,"dayLengthDisplay":"14 Hours 13 Mins 36 Secs","nightLengthDisplay":"9 Hours 46 Mins 24 Secs","moonriseLocal":"17:11","moonsetLocal":"03:35","rahuKala":{"name":"Rāhu Kāla","start":"17:33","end":"19:20","startHours":17.54901352588958,"endHours":19.327345350225958,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:13","end":"14:00","startHours":12.214018052880458,"endHours":13.992349877216832,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:46","end":"17:33","startHours":15.770681701553208,"endHours":17.54901352588958,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:25","end":"08:54","startHours":8.42024349429619,"endHours":8.894465314119225,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:42","end":"06:04","startHours":5.69346803031375,"endHours":6.072845486172176,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:44","end":"12:41","startHours":11.739796233057426,"endHours":12.688239872703491,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:12","end":"04:09","startHours":3.2038034762428254,"endHours":4.152247115888891,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"03:55","end":"05:06","startHours":3.915136205977375,"endHours":5.100690755534958,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:35","end":"15:32","startHours":14.585127151995625,"endHours":15.533570791641692,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:08","end":"19:32","startHours":19.12734535022596,"endHours":19.527345350225957,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:20","end":"19:55","startHours":19.327345350225958,"endHours":19.92012262500475,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:05","end":"20:50","startHours":19.077345350225958,"endHours":20.827345350225958,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:44","end":"00:41","startHours":23.739796233057426,"endHours":24.68823987270349,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:06","end":"06:53","startHours":5.100690755534958,"endHours":6.879022579871333,"quality":"inauspicious"},{"name":"Chala","start":"06:53","end":"08:39","startHours":6.879022579871333,"endHours":8.657354404207709,"quality":"neutral"},{"name":"Labha","start":"08:39","end":"10:26","startHours":8.657354404207709,"endHours":10.435686228544082,"quality":"auspicious"},{"name":"Amṛta","start":"10:26","end":"12:13","startHours":10.435686228544082,"endHours":12.214018052880458,"quality":"auspicious"},{"name":"Kāla","start":"12:13","end":"14:00","startHours":12.214018052880458,"endHours":13.992349877216832,"quality":"inauspicious"},{"name":"Śubha","start":"14:00","end":"15:46","startHours":13.992349877216832,"endHours":15.770681701553208,"quality":"auspicious"},{"name":"Roga","start":"15:46","end":"17:33","startHours":15.770681701553208,"endHours":17.54901352588958,"quality":"inauspicious"},{"name":"Udveg","start":"17:33","end":"19:20","startHours":17.54901352588958,"endHours":19.327345350225958,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"19:20","end":"20:33","startHours":19.327345350225958,"endHours":20.549013525889585,"quality":"auspicious"},{"name":"Roga","start":"20:33","end":"21:46","startHours":20.549013525889585,"endHours":21.770681701553208,"quality":"inauspicious"},{"name":"Udveg","start":"21:46","end":"23:00","startHours":21.770681701553208,"endHours":22.99234987721683,"quality":"inauspicious"},{"name":"Chala","start":"23:00","end":"00:13","startHours":22.99234987721683,"endHours":24.21401805288046,"quality":"neutral"},{"name":"Labha","start":"00:13","end":"01:26","startHours":24.21401805288046,"endHours":25.435686228544085,"quality":"auspicious"},{"name":"Amṛta","start":"01:26","end":"02:39","startHours":25.435686228544085,"endHours":26.65735440420771,"quality":"auspicious"},{"name":"Kāla","start":"02:39","end":"03:53","startHours":26.65735440420771,"endHours":27.879022579871332,"quality":"inauspicious"},{"name":"Śubha","start":"03:53","end":"05:06","startHours":27.879022579871332,"endHours":29.10069075553496,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:06","end":"06:06","startHours":5.100690755534958,"endHours":6.100690755534958,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:06","end":"07:06","startHours":6.100690755534958,"endHours":7.100690755534958,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:06","end":"08:06","startHours":7.100690755534958,"endHours":8.10069075553496,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:06","end":"09:06","startHours":8.10069075553496,"endHours":9.10069075553496,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:06","end":"10:06","startHours":9.10069075553496,"endHours":10.10069075553496,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:06","end":"11:06","startHours":10.10069075553496,"endHours":11.10069075553496,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:06","end":"12:06","startHours":11.10069075553496,"endHours":12.10069075553496,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:06","end":"13:06","startHours":12.10069075553496,"endHours":13.10069075553496,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:06","end":"14:06","startHours":13.10069075553496,"endHours":14.10069075553496,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:06","end":"15:06","startHours":14.10069075553496,"endHours":15.10069075553496,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:06","end":"16:06","startHours":15.10069075553496,"endHours":16.10069075553496,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:06","end":"17:06","startHours":16.10069075553496,"endHours":17.10069075553496,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:06","end":"18:06","startHours":17.10069075553496,"endHours":18.10069075553496,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:06","end":"19:06","startHours":18.10069075553496,"endHours":19.10069075553496,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:06","end":"20:06","startHours":19.10069075553496,"endHours":20.10069075553496,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:06","end":"21:06","startHours":20.10069075553496,"endHours":21.10069075553496,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:06","end":"22:06","startHours":21.10069075553496,"endHours":22.10069075553496,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:06","end":"23:06","startHours":22.10069075553496,"endHours":23.10069075553496,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:06","end":"00:06","startHours":23.10069075553496,"endHours":24.10069075553496,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:06","end":"01:06","startHours":24.10069075553496,"endHours":25.10069075553496,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:06","end":"02:06","startHours":25.10069075553496,"endHours":26.10069075553496,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:06","end":"03:06","startHours":26.10069075553496,"endHours":27.10069075553496,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:06","end":"04:06","startHours":27.10069075553496,"endHours":28.10069075553496,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:06","end":"05:06","startHours":28.10069075553496,"endHours":29.10069075553496,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Hasta","Citrā","Svātī","Viśākhā","Anurādhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Karka","Tulā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Siṃha","Kanyā","Dhanu","Makara"]},"dishaShool":"West (Paścim)","chandraVasa":"South-East","rahuVasa":"North-East","anandadiYoga":{"name":"Dhūmra","quality":"Inauspicious"},"tropicalRitu":"Hemanta (Pre-winter) (tropical)","vedicRitu":"Śarad (Autumn)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-23.308407522669246,"eotMinutes":3.716916827172506,"ayanamsa":25.375}},"calendars":{"vikram_samvat":2165,"vikram_samvatsara":"Vṛṣa","saka_samvat":2030,"saka_samvatsara":"Vibhava","bengali_samvat":1515,"malayalam_era":1284,"nanakshahi_year":639,"lunar_month":"Mārgaśīrṣa","lunar_month_paksha_full":"Mārgaśīrṣa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Mārgaśīrṣa","lunar_month_amanta":"Mārgaśīrṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Vṛścika (Kārttikai)","ritu":"Hemanta (Pre-winter)","display_summary":"Mārgaśīrṣa Śukla Trayodaśī · Vikram 2165 Vṛṣa · Śaka 2030 Vibhava"},"festivals":[{"id":"pradosha-vrata","name":"Pradoṣa Vrata","name_sanskrit":"प्रदोष व्रत","tradition":"Shaiva","associated_deity":"Śiva","significance":"Twilight worship of Śiva on Trayodaśī.","vrata":true,"detection":{"any_of":[{"tithi_number":13},{"tithi_number":28}]},"precedence":7}],"todays_walk":{"walk":{"id":"surya-walk","name":"Sūrya Walk","name_sanskrit":"सूर्य यात्रा","type":"graha","description":"Self-illumination + BG 4.1 (Sun-lineage of Gītā transmission).","step_count":6,"url":"/walk/surya-walk"},"reason":"Ravivāra (Sunday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3137-10-04","event":"Mahābhārata Day 1 (Bhagavad Gītā delivered)","chart_id":"krishna","shared_marker":"same Kṛttikā","url":"/day/-3137-10-04","relevance":0.5},{"historical_date":"-3137-12-25","event":"Bhīṣma's Mahaprasthan","chart_id":"bhishma","shared_marker":"same Kṛttikā","url":"/day/-3137-12-25","relevance":0.5}]},"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 16, 2108 CE · Perth, Australia · Vidhyamitra","description":"December 16, 2108 CE for Perth, Australia: Śukla Trayodaśī, sūryodaya 05:06, sūryāsta 19:20.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2108-12-16","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2108-12-16","sa":"https://sa.vidhyamitra.com/city/perth/2108-12-16","hi":"https://hi.vidhyamitra.com/city/perth/2108-12-16","x-default":"https://vidhyamitra.com/city/perth/2108-12-16"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T23:29:47.503Z","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":"2026-06-01T23:29:47.503Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T23:29:47.503Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}