{"id":"vidhyamitra:city-day:perth:2186-12-16:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2186-12-16","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2186-12-16","date_display":"December 16, 2186 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":2186,"month":12,"day":16,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2519829.770833,"kali_year":5288,"ahargana":1931364.2708,"sun":{"sidereal_longitude":236.9394,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":297.0723,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":6,"name":"Ṣaṣṭhī","paksha":"Śukla","full_name":"Śukla Ṣaṣṭhī","elongation_degrees":60.1329,"elapsed_within_tithi_degrees":0.1329},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2,"moon_longitude":297.0723,"elapsed_within_degrees":3.739},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":174.0117},"karana":{"half_tithi_index":10,"name":"Kaulava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"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":2186,"month":12,"day":16,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2519829.770833,"ahargana":1931364.2708,"kali_year":5288,"ayanamsa_lahiri":26.4646,"grahas":{"sun":{"sidereal_longitude":237.78393000000005,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":294.09663,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false,"latitude":-2.2514},"mars":{"sidereal_longitude":151.41203000000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":250.19182999999998,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":270.6893299999999,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":190.61183000000005,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":162.06043,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":87.0266,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":267.0266,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","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":2186,"month":12,"day":16,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2519829.770833,"kali_year":5288,"ahargana":1931364.2708,"sun":{"sidereal_longitude":236.9394,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":297.0723,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":6,"name":"Ṣaṣṭhī","paksha":"Śukla","full_name":"Śukla Ṣaṣṭhī","elongation_degrees":60.1329,"elapsed_within_tithi_degrees":0.1329},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2,"moon_longitude":297.0723,"elapsed_within_degrees":3.739},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":174.0117},"karana":{"half_tithi_index":10,"name":"Kaulava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.251,"elongation":60.133},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.251,"opposition_distance":119.867}},"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":14.22697908641888,"dayLengthDisplay":"14 Hours 13 Mins 37 Secs","nightLengthDisplay":"9 Hours 46 Mins 23 Secs","moonriseLocal":"09:18","moonsetLocal":"22:38","rahuKala":{"name":"Rāhu Kāla","start":"08:39","end":"10:26","startHours":8.657273281275739,"endHours":10.435645667078099,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"14:00","end":"15:46","startHours":13.992390438682818,"endHours":15.770762824485178,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"05:06","end":"06:53","startHours":5.100528509671019,"endHours":6.878900895473379,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:25","end":"08:54","startHours":8.420156963168758,"endHours":8.89438959938272,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:42","end":"06:04","startHours":5.6933193049384725,"endHours":6.072705413909643,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:44","end":"12:41","startHours":11.739785416666496,"endHours":12.68825068909442,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:12","end":"04:09","startHours":3.2035979648151685,"endHours":4.152063237243094,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"03:55","end":"05:06","startHours":3.914946919136112,"endHours":5.100528509671019,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:35","end":"15:32","startHours":14.585181233950273,"endHours":15.533646506378199,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:08","end":"19:32","startHours":19.1275075960899,"endHours":19.527507596089897,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:20","end":"19:55","startHours":19.327507596089898,"endHours":19.920298391357353,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:05","end":"20:50","startHours":19.077507596089898,"endHours":20.827507596089898,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:44","end":"00:41","startHours":23.739785416666496,"endHours":24.68825068909442,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"05:06","end":"06:53","startHours":5.100528509671019,"endHours":6.878900895473379,"quality":"inauspicious"},{"name":"Śubha","start":"06:53","end":"08:39","startHours":6.878900895473379,"endHours":8.657273281275739,"quality":"auspicious"},{"name":"Roga","start":"08:39","end":"10:26","startHours":8.657273281275739,"endHours":10.435645667078099,"quality":"inauspicious"},{"name":"Udveg","start":"10:26","end":"12:13","startHours":10.435645667078099,"endHours":12.214018052880458,"quality":"inauspicious"},{"name":"Chala","start":"12:13","end":"14:00","startHours":12.214018052880458,"endHours":13.992390438682818,"quality":"neutral"},{"name":"Labha","start":"14:00","end":"15:46","startHours":13.992390438682818,"endHours":15.770762824485178,"quality":"auspicious"},{"name":"Amṛta","start":"15:46","end":"17:33","startHours":15.770762824485178,"endHours":17.549135210287538,"quality":"auspicious"},{"name":"Kāla","start":"17:33","end":"19:20","startHours":17.549135210287538,"endHours":19.327507596089898,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"19:20","end":"20:33","startHours":19.327507596089898,"endHours":20.549135210287538,"quality":"auspicious"},{"name":"Amṛta","start":"20:33","end":"21:46","startHours":20.549135210287538,"endHours":21.77076282448518,"quality":"auspicious"},{"name":"Kāla","start":"21:46","end":"23:00","startHours":21.77076282448518,"endHours":22.99239043868282,"quality":"inauspicious"},{"name":"Śubha","start":"23:00","end":"00:13","startHours":22.99239043868282,"endHours":24.21401805288046,"quality":"auspicious"},{"name":"Roga","start":"00:13","end":"01:26","startHours":24.21401805288046,"endHours":25.4356456670781,"quality":"inauspicious"},{"name":"Udveg","start":"01:26","end":"02:39","startHours":25.4356456670781,"endHours":26.65727328127574,"quality":"inauspicious"},{"name":"Chala","start":"02:39","end":"03:53","startHours":26.65727328127574,"endHours":27.87890089547338,"quality":"neutral"},{"name":"Labha","start":"03:53","end":"05:06","startHours":27.87890089547338,"endHours":29.10052850967102,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:06","end":"06:06","startHours":5.100528509671019,"endHours":6.100528509671019,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"06:06","end":"07:06","startHours":6.100528509671019,"endHours":7.100528509671019,"planetary_lord":"Moon"},{"name":"Hora 3","start":"07:06","end":"08:06","startHours":7.100528509671019,"endHours":8.100528509671019,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"08:06","end":"09:06","startHours":8.100528509671019,"endHours":9.100528509671019,"planetary_lord":"Venus"},{"name":"Hora 5","start":"09:06","end":"10:06","startHours":9.100528509671019,"endHours":10.100528509671019,"planetary_lord":"Sun"},{"name":"Hora 6","start":"10:06","end":"11:06","startHours":10.100528509671019,"endHours":11.100528509671019,"planetary_lord":"Mars"},{"name":"Hora 7","start":"11:06","end":"12:06","startHours":11.100528509671019,"endHours":12.100528509671019,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"12:06","end":"13:06","startHours":12.100528509671019,"endHours":13.100528509671019,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"13:06","end":"14:06","startHours":13.100528509671019,"endHours":14.100528509671019,"planetary_lord":"Moon"},{"name":"Hora 10","start":"14:06","end":"15:06","startHours":14.100528509671019,"endHours":15.100528509671019,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"15:06","end":"16:06","startHours":15.100528509671019,"endHours":16.10052850967102,"planetary_lord":"Venus"},{"name":"Hora 12","start":"16:06","end":"17:06","startHours":16.10052850967102,"endHours":17.10052850967102,"planetary_lord":"Sun"},{"name":"Hora 13","start":"17:06","end":"18:06","startHours":17.10052850967102,"endHours":18.10052850967102,"planetary_lord":"Mars"},{"name":"Hora 14","start":"18:06","end":"19:06","startHours":18.10052850967102,"endHours":19.10052850967102,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"19:06","end":"20:06","startHours":19.10052850967102,"endHours":20.10052850967102,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"20:06","end":"21:06","startHours":20.10052850967102,"endHours":21.10052850967102,"planetary_lord":"Moon"},{"name":"Hora 17","start":"21:06","end":"22:06","startHours":21.10052850967102,"endHours":22.10052850967102,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"22:06","end":"23:06","startHours":22.10052850967102,"endHours":23.10052850967102,"planetary_lord":"Venus"},{"name":"Hora 19","start":"23:06","end":"00:06","startHours":23.10052850967102,"endHours":24.10052850967102,"planetary_lord":"Sun"},{"name":"Hora 20","start":"00:06","end":"01:06","startHours":24.10052850967102,"endHours":25.10052850967102,"planetary_lord":"Mars"},{"name":"Hora 21","start":"01:06","end":"02:06","startHours":25.10052850967102,"endHours":26.10052850967102,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"02:06","end":"03:06","startHours":26.10052850967102,"endHours":27.10052850967102,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"03:06","end":"04:06","startHours":27.10052850967102,"endHours":28.10052850967102,"planetary_lord":"Moon"},{"name":"Hora 24","start":"04:06","end":"05:06","startHours":28.10052850967102,"endHours":29.10052850967102,"planetary_lord":"Mercury"}],"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","Tulā","Vṛścika","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Dhanu","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"South-East","rahuVasa":"East","anandadiYoga":{"name":"Siddhi","quality":"Auspicious"},"tropicalRitu":"Hemanta (Pre-winter) (tropical)","vedicRitu":"Śarad (Autumn)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-23.311525982680646,"eotMinutes":3.716916827172506,"ayanamsa":26.4646}},"calendars":{"vikram_samvat":2243,"vikram_samvatsara":"Vikāri","saka_samvat":2108,"saka_samvatsara":"Vyaya","bengali_samvat":1593,"malayalam_era":1362,"nanakshahi_year":717,"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 Ṣaṣṭhī · Vikram 2243 Vikāri · Śaka 2108 Vyaya"},"festivals":[{"id":"skanda-shashthi","name":"Skanda Ṣaṣṭhī","name_sanskrit":"स्कन्द षष्ठी","tradition":"Shaiva","associated_deity":"Kārttikeya / Skanda / Murugan","significance":"Kārttikeya's victory over Tāraka. Important Shaiva day in Tamil tradition.","vrata":true,"detection":{"tithi_number":6,"tithi_paksha":"Śukla","lunar_month":"Mārgaśīrṣa"},"precedence":3}],"todays_walk":{"walk":{"id":"shani-walk","name":"Śani Walk","name_sanskrit":"शनि यात्रा","type":"graha","description":"Tapas + endurance + BG 17.14-19.","step_count":7,"url":"/walk/shani-walk"},"reason":"Śanivāra (Saturday) — 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 16, 2186 CE · Perth, Australia · Vidhyamitra","description":"December 16, 2186 CE for Perth, Australia: Śukla Ṣaṣṭhī, sūryodaya 05:06, sūryāsta 19:20.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2186-12-16","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2186-12-16","sa":"https://sa.vidhyamitra.com/city/perth/2186-12-16","hi":"https://hi.vidhyamitra.com/city/perth/2186-12-16","x-default":"https://vidhyamitra.com/city/perth/2186-12-16"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T15:05:04.408Z","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":"2026-06-01T15:05:04.408Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T15:05:04.408Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}