{"id":"vidhyamitra:city-day:perth:1899-12-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1899-12-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1899-12-13","date_display":"December 13, 1899 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":1899,"month":12,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2415001.770833,"kali_year":5001,"ahargana":1826536.2708,"sun":{"sidereal_longitude":238.2348,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":9.1789,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":130.944,"elapsed_within_tithi_degrees":10.944},"nakshatra":{"number":1,"name":"Aśvinī","pada":3,"moon_longitude":9.1789,"elapsed_within_degrees":9.1789},"yoga":{"number":19,"name":"Parigha","sum_longitude":247.4137},"karana":{"half_tithi_index":21,"name":"Viṣṭi"},"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":1899,"month":12,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2415001.770833,"ahargana":1826536.2708,"kali_year":5001,"ayanamsa_lahiri":22.4554,"grahas":{"sun":{"sidereal_longitude":238.38932999999997,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":9.270129999999995,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":3},"retrograde":false,"latitude":3.5514},"mars":{"sidereal_longitude":248.30003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":225.46683000000007,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":4},"retrograde":true},"jupiter":{"sidereal_longitude":216.15493000000004,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":261.69813,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":244.16733,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":241.3185,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":61.3185,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":3},"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":1899,"month":12,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2415001.770833,"kali_year":5001,"ahargana":1826536.2708,"sun":{"sidereal_longitude":238.2348,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":9.1789,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":130.944,"elapsed_within_tithi_degrees":10.944},"nakshatra":{"number":1,"name":"Aśvinī","pada":3,"moon_longitude":9.1789,"elapsed_within_degrees":9.1789},"yoga":{"number":19,"name":"Parigha","sum_longitude":247.4137},"karana":{"half_tithi_index":21,"name":"Viṣṭi"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.551,"elongation":130.944},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.551,"opposition_distance":49.056}},"eclipse_window_40days":[{"offset_days":-10,"type":"solar","occurs":true,"moon_latitude":-1.163,"elongation":1.142},{"offset_days":4,"type":"lunar","occurs":true,"moon_latitude":-0.214,"opposition_distance":1.5}]},"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":"05:05","sunsetLocal":"19:18","solarNoonLocal":"12:11","dayLengthHours":14.20713476209443,"dayLengthDisplay":"14 Hours 12 Mins 26 Secs","nightLengthDisplay":"9 Hours 47 Mins 34 Secs","moonriseLocal":"15:23","moonsetLocal":"02:27","rahuKala":{"name":"Rāhu Kāla","start":"12:11","end":"13:58","startHours":12.191122495843032,"endHours":13.967014341104836,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"06:52","end":"08:38","startHours":6.863446960057621,"endHours":8.639338805319424,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:25","end":"12:11","startHours":10.415230650581229,"endHours":12.191122495843032,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:24","end":"08:53","startHours":8.402553225951184,"endHours":8.876124384687664,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:41","end":"06:04","startHours":5.679519063216418,"endHours":6.058375990205603,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:43","end":"12:40","startHours":11.71755133710655,"endHours":12.664693654579512,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:12","end":"04:08","startHours":3.1932704798498923,"endHours":4.140412797322854,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"03:54","end":"05:05","startHours":3.903627217954614,"endHours":5.0875551147958165,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:34","end":"15:30","startHours":14.558978289525434,"endHours":15.506120606998396,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:06","end":"19:30","startHours":19.094689876890246,"endHours":19.494689876890245,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:18","end":"19:53","startHours":19.294689876890246,"endHours":19.886653825310848,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:03","end":"20:48","startHours":19.044689876890246,"endHours":20.794689876890246,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:43","end":"00:40","startHours":23.717551337106553,"endHours":24.664693654579512,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"05:05","end":"06:52","startHours":5.0875551147958165,"endHours":6.863446960057621,"quality":"auspicious"},{"name":"Amṛta","start":"06:52","end":"08:38","startHours":6.863446960057621,"endHours":8.639338805319424,"quality":"auspicious"},{"name":"Kāla","start":"08:38","end":"10:25","startHours":8.639338805319424,"endHours":10.415230650581229,"quality":"inauspicious"},{"name":"Śubha","start":"10:25","end":"12:11","startHours":10.415230650581229,"endHours":12.191122495843032,"quality":"auspicious"},{"name":"Roga","start":"12:11","end":"13:58","startHours":12.191122495843032,"endHours":13.967014341104836,"quality":"inauspicious"},{"name":"Udveg","start":"13:58","end":"15:45","startHours":13.967014341104836,"endHours":15.742906186366639,"quality":"inauspicious"},{"name":"Chala","start":"15:45","end":"17:31","startHours":15.742906186366639,"endHours":17.518798031628442,"quality":"neutral"},{"name":"Labha","start":"17:31","end":"19:18","startHours":17.518798031628442,"endHours":19.294689876890246,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"19:18","end":"20:31","startHours":19.294689876890246,"endHours":20.518798031628442,"quality":"inauspicious"},{"name":"Chala","start":"20:31","end":"21:45","startHours":20.518798031628442,"endHours":21.74290618636664,"quality":"neutral"},{"name":"Labha","start":"21:45","end":"22:58","startHours":21.74290618636664,"endHours":22.967014341104836,"quality":"auspicious"},{"name":"Amṛta","start":"22:58","end":"00:11","startHours":22.967014341104836,"endHours":24.191122495843032,"quality":"auspicious"},{"name":"Kāla","start":"00:11","end":"01:25","startHours":24.191122495843032,"endHours":25.41523065058123,"quality":"inauspicious"},{"name":"Śubha","start":"01:25","end":"02:38","startHours":25.41523065058123,"endHours":26.639338805319422,"quality":"auspicious"},{"name":"Roga","start":"02:38","end":"03:52","startHours":26.639338805319422,"endHours":27.86344696005762,"quality":"inauspicious"},{"name":"Udveg","start":"03:52","end":"05:05","startHours":27.86344696005762,"endHours":29.087555114795816,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:05","end":"06:05","startHours":5.0875551147958165,"endHours":6.0875551147958165,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"06:05","end":"07:05","startHours":6.0875551147958165,"endHours":7.0875551147958165,"planetary_lord":"Venus"},{"name":"Hora 3","start":"07:05","end":"08:05","startHours":7.0875551147958165,"endHours":8.087555114795816,"planetary_lord":"Sun"},{"name":"Hora 4","start":"08:05","end":"09:05","startHours":8.087555114795816,"endHours":9.087555114795816,"planetary_lord":"Mars"},{"name":"Hora 5","start":"09:05","end":"10:05","startHours":9.087555114795816,"endHours":10.087555114795816,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"10:05","end":"11:05","startHours":10.087555114795816,"endHours":11.087555114795816,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"11:05","end":"12:05","startHours":11.087555114795816,"endHours":12.087555114795816,"planetary_lord":"Moon"},{"name":"Hora 8","start":"12:05","end":"13:05","startHours":12.087555114795816,"endHours":13.087555114795816,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"13:05","end":"14:05","startHours":13.087555114795816,"endHours":14.087555114795816,"planetary_lord":"Venus"},{"name":"Hora 10","start":"14:05","end":"15:05","startHours":14.087555114795816,"endHours":15.087555114795816,"planetary_lord":"Sun"},{"name":"Hora 11","start":"15:05","end":"16:05","startHours":15.087555114795816,"endHours":16.087555114795816,"planetary_lord":"Mars"},{"name":"Hora 12","start":"16:05","end":"17:05","startHours":16.087555114795816,"endHours":17.087555114795816,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"17:05","end":"18:05","startHours":17.087555114795816,"endHours":18.087555114795816,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"18:05","end":"19:05","startHours":18.087555114795816,"endHours":19.087555114795816,"planetary_lord":"Moon"},{"name":"Hora 15","start":"19:05","end":"20:05","startHours":19.087555114795816,"endHours":20.087555114795816,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"20:05","end":"21:05","startHours":20.087555114795816,"endHours":21.087555114795816,"planetary_lord":"Venus"},{"name":"Hora 17","start":"21:05","end":"22:05","startHours":21.087555114795816,"endHours":22.087555114795816,"planetary_lord":"Sun"},{"name":"Hora 18","start":"22:05","end":"23:05","startHours":22.087555114795816,"endHours":23.087555114795816,"planetary_lord":"Mars"},{"name":"Hora 19","start":"23:05","end":"00:05","startHours":23.087555114795816,"endHours":24.087555114795816,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"00:05","end":"01:05","startHours":24.087555114795816,"endHours":25.087555114795816,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"01:05","end":"02:05","startHours":25.087555114795816,"endHours":26.087555114795816,"planetary_lord":"Moon"},{"name":"Hora 22","start":"02:05","end":"03:05","startHours":26.087555114795816,"endHours":27.087555114795816,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"03:05","end":"04:05","startHours":27.087555114795816,"endHours":28.087555114795816,"planetary_lord":"Venus"},{"name":"Hora 24","start":"04:05","end":"05:05","startHours":28.087555114795816,"endHours":29.087555114795816,"planetary_lord":"Sun"}],"taraBala":{"favorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Svātī","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"unfavorable_nakshatras":["Aśvinī","Punarvasu","Puṣya","Aśleṣā","Maghā","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Bhādrapadā","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":"Mānasa","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":-23.120466583210455,"eotMinutes":5.090650249418121,"ayanamsa":22.4554}},"calendars":{"vikram_samvat":1956,"vikram_samvatsara":"Paridhāvi","saka_samvat":1821,"saka_samvatsara":"Vikāri","bengali_samvat":1306,"malayalam_era":1075,"nanakshahi_year":430,"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 Ekādaśī · Vikram 1956 Paridhāvi · Śaka 1821 Vikāri"},"festivals":[{"id":"gita-jayanti","name":"Gītā Jayantī (= Mokṣadā Ekādaśī)","name_sanskrit":"गीता जयन्ती","tradition":"Vaishnava","associated_deity":"Krishna (Bhagavad-Gītā speaker)","significance":"Day Bhagavad Gītā was delivered at Kurukṣetra (Mahābhārata Day 1).","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Mārgaśīrṣa"},"precedence":1,"related_chart":"krishna","historical_anchor":{"event":"Bhagavad Gītā delivered at Kurukṣetra (Mahābhārata Day 1)","date_julian":"-3137-10-04","location":"Kurukṣetra"},"sources":["Bhagavad Gītā (Mahābhārata, Bhīṣma Parva)"]},{"id":"vaikuntha-ekadashi","name":"Vaikuṇṭha Ekādaśī","name_sanskrit":"वैकुण्ठ एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Most sacred Ekādaśī of the year; 'Vaikuṇṭha-dvāram udghaṭitam'.","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Mārgaśīrṣa"},"precedence":2},{"id":"mokshada-ekadashi","name":"Mokṣadā Ekādaśī (Gītā Jayantī)","name_sanskrit":"मोक्षदा एकादशी / गीता जयन्ती","tradition":"Vaishnava","associated_deity":"Krishna (Bhagavad Gītā delivery)","significance":"Day Bhagavad Gītā was delivered at Kurukṣetra.","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Mārgaśīrṣa"},"precedence":3},{"id":"ekadashi","name":"Ekādaśī","name_sanskrit":"एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Sacred to Bhagavān Viṣṇu; vrata for purification.","vrata":true,"detection":{"any_of":[{"tithi_number":11},{"tithi_number":26}]},"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":[{"historical_date":"-3101-02-18","event":"Kali Yuga Epoch","chart_id":"kali-yuga-epoch","shared_marker":"same Aśvinī","url":"/day/-3101-02-18","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 13, 1899 CE · Perth, Australia · Vidhyamitra","description":"December 13, 1899 CE for Perth, Australia: Śukla Ekādaśī, sūryodaya 05:05, sūryāsta 19:18.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1899-12-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1899-12-13","sa":"https://sa.vidhyamitra.com/city/perth/1899-12-13","hi":"https://hi.vidhyamitra.com/city/perth/1899-12-13","x-default":"https://vidhyamitra.com/city/perth/1899-12-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-03T05:09:31.714Z","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":"2026-06-03T05:09:31.714Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-03T05:09:31.714Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}