{"id":"vidhyamitra:city-day:perth:1983-08-20:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1983-08-20","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1983-08-20","date_display":"August 20, 1983 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":1983,"month":8,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2445566.770833,"kali_year":5085,"ahargana":1857101.2708,"sun":{"sidereal_longitude":122.259,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":261.6549,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":139.3959,"elapsed_within_tithi_degrees":7.3959},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3,"moon_longitude":261.6549,"elapsed_within_degrees":8.3216},"yoga":{"number":2,"name":"Prīti","sum_longitude":23.9139},"karana":{"half_tithi_index":23,"name":"Bālava"},"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":1983,"month":8,"day":20,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2445566.770833,"ahargana":1857101.2708,"kali_year":5085,"ayanamsa_lahiri":23.6244,"grahas":{"sun":{"sidereal_longitude":122.85512299999999,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":263.74592299999995,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false,"latitude":-1.5242},"mars":{"sidereal_longitude":100.73432300000002,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":150.49102299999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":218.98952299999996,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":131.07822299999998,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":true},"saturn":{"sidereal_longitude":185.690023,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":61.8377,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":241.8377,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","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":1983,"month":8,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2445566.770833,"kali_year":5085,"ahargana":1857101.2708,"sun":{"sidereal_longitude":122.259,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":261.6549,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":139.3959,"elapsed_within_tithi_degrees":7.3959},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3,"moon_longitude":261.6549,"elapsed_within_degrees":8.3216},"yoga":{"number":2,"name":"Prīti","sum_longitude":23.9139},"karana":{"half_tithi_index":23,"name":"Bālava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-1.524,"elongation":139.396},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-1.524,"opposition_distance":40.604}},"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":"06:48","sunsetLocal":"17:51","solarNoonLocal":"12:20","dayLengthHours":11.059119202706105,"dayLengthDisplay":"11 Hours 03 Mins 33 Secs","nightLengthDisplay":"12 Hours 56 Mins 27 Secs","moonriseLocal":"14:41","moonsetLocal":"04:46","rahuKala":{"name":"Rāhu Kāla","start":"09:34","end":"10:57","startHours":9.562020381165645,"endHours":10.944410281503908,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:43","end":"15:05","startHours":13.709190082180434,"endHours":15.091579982518697,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:48","end":"08:11","startHours":6.7972405804891185,"endHours":8.179630480827381,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:23","end":"09:45","startHours":9.37770172778721,"endHours":9.74633903454408,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:15","end":"07:33","startHours":7.258037213935206,"endHours":7.552947059340703,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:57","end":"12:42","startHours":11.9581628750853,"endHours":12.69543748859904,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:19","end":"06:04","startHours":5.322691353461638,"endHours":6.059965966975378,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:53","end":"06:48","startHours":5.875647313596943,"endHours":6.7972405804891185,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:10","end":"14:54","startHours":14.169986715626521,"endHours":14.907261329140262,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:39","end":"18:03","startHours":17.656359783195224,"endHours":18.056359783195223,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:51","end":"18:19","startHours":17.856359783195224,"endHours":18.31715641664131,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:36","end":"19:21","startHours":17.606359783195224,"endHours":19.356359783195224,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:57","end":"00:42","startHours":23.9581628750853,"endHours":24.69543748859904,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"06:48","end":"08:11","startHours":6.7972405804891185,"endHours":8.179630480827381,"quality":"inauspicious"},{"name":"Śubha","start":"08:11","end":"09:34","startHours":8.179630480827381,"endHours":9.562020381165645,"quality":"auspicious"},{"name":"Roga","start":"09:34","end":"10:57","startHours":9.562020381165645,"endHours":10.944410281503908,"quality":"inauspicious"},{"name":"Udveg","start":"10:57","end":"12:20","startHours":10.944410281503908,"endHours":12.32680018184217,"quality":"inauspicious"},{"name":"Chala","start":"12:20","end":"13:43","startHours":12.32680018184217,"endHours":13.709190082180434,"quality":"neutral"},{"name":"Labha","start":"13:43","end":"15:05","startHours":13.709190082180434,"endHours":15.091579982518697,"quality":"auspicious"},{"name":"Amṛta","start":"15:05","end":"16:28","startHours":15.091579982518697,"endHours":16.473969882856963,"quality":"auspicious"},{"name":"Kāla","start":"16:28","end":"17:51","startHours":16.473969882856963,"endHours":17.856359783195224,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"17:51","end":"19:28","startHours":17.856359783195224,"endHours":19.47396988285696,"quality":"auspicious"},{"name":"Amṛta","start":"19:28","end":"21:05","startHours":19.47396988285696,"endHours":21.0915799825187,"quality":"auspicious"},{"name":"Kāla","start":"21:05","end":"22:43","startHours":21.0915799825187,"endHours":22.709190082180434,"quality":"inauspicious"},{"name":"Śubha","start":"22:43","end":"00:20","startHours":22.709190082180434,"endHours":24.32680018184217,"quality":"auspicious"},{"name":"Roga","start":"00:20","end":"01:57","startHours":24.32680018184217,"endHours":25.944410281503906,"quality":"inauspicious"},{"name":"Udveg","start":"01:57","end":"03:34","startHours":25.944410281503906,"endHours":27.562020381165645,"quality":"inauspicious"},{"name":"Chala","start":"03:34","end":"05:11","startHours":27.562020381165645,"endHours":29.17963048082738,"quality":"neutral"},{"name":"Labha","start":"05:11","end":"06:48","startHours":29.17963048082738,"endHours":30.797240580489117,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:48","end":"07:48","startHours":6.7972405804891185,"endHours":7.7972405804891185,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"07:48","end":"08:48","startHours":7.7972405804891185,"endHours":8.797240580489118,"planetary_lord":"Moon"},{"name":"Hora 3","start":"08:48","end":"09:48","startHours":8.797240580489118,"endHours":9.797240580489118,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"09:48","end":"10:48","startHours":9.797240580489118,"endHours":10.797240580489118,"planetary_lord":"Venus"},{"name":"Hora 5","start":"10:48","end":"11:48","startHours":10.797240580489118,"endHours":11.797240580489118,"planetary_lord":"Sun"},{"name":"Hora 6","start":"11:48","end":"12:48","startHours":11.797240580489118,"endHours":12.797240580489118,"planetary_lord":"Mars"},{"name":"Hora 7","start":"12:48","end":"13:48","startHours":12.797240580489118,"endHours":13.797240580489118,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"13:48","end":"14:48","startHours":13.797240580489118,"endHours":14.797240580489118,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"14:48","end":"15:48","startHours":14.797240580489118,"endHours":15.797240580489118,"planetary_lord":"Moon"},{"name":"Hora 10","start":"15:48","end":"16:48","startHours":15.797240580489118,"endHours":16.797240580489117,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"16:48","end":"17:48","startHours":16.797240580489117,"endHours":17.797240580489117,"planetary_lord":"Venus"},{"name":"Hora 12","start":"17:48","end":"18:48","startHours":17.797240580489117,"endHours":18.797240580489117,"planetary_lord":"Sun"},{"name":"Hora 13","start":"18:48","end":"19:48","startHours":18.797240580489117,"endHours":19.797240580489117,"planetary_lord":"Mars"},{"name":"Hora 14","start":"19:48","end":"20:48","startHours":19.797240580489117,"endHours":20.797240580489117,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"20:48","end":"21:48","startHours":20.797240580489117,"endHours":21.797240580489117,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"21:48","end":"22:48","startHours":21.797240580489117,"endHours":22.797240580489117,"planetary_lord":"Moon"},{"name":"Hora 17","start":"22:48","end":"23:48","startHours":22.797240580489117,"endHours":23.797240580489117,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"23:48","end":"00:48","startHours":23.797240580489117,"endHours":24.797240580489117,"planetary_lord":"Venus"},{"name":"Hora 19","start":"00:48","end":"01:48","startHours":24.797240580489117,"endHours":25.797240580489117,"planetary_lord":"Sun"},{"name":"Hora 20","start":"01:48","end":"02:48","startHours":25.797240580489117,"endHours":26.797240580489117,"planetary_lord":"Mars"},{"name":"Hora 21","start":"02:48","end":"03:48","startHours":26.797240580489117,"endHours":27.797240580489117,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"03:48","end":"04:48","startHours":27.797240580489117,"endHours":28.797240580489117,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"04:48","end":"05:48","startHours":28.797240580489117,"endHours":29.797240580489117,"planetary_lord":"Moon"},{"name":"Hora 24","start":"05:48","end":"06:48","startHours":29.797240580489117,"endHours":30.797240580489117,"planetary_lord":"Mercury"}],"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":["Vṛṣabha","Mithuna","Kanyā","Tulā","Dhanu","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Makara","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"East","rahuVasa":"East","anandadiYoga":{"name":"Utpāta","quality":"Inauspicious"},"tropicalRitu":"Varṣā (Monsoon)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":12.6879936018828,"eotMinutes":-3.0500109105302213,"ayanamsa":23.6244}},"calendars":{"vikram_samvat":2040,"vikram_samvatsara":"Dhātṛ","saka_samvat":1905,"saka_samvatsara":"Rudhirodgāri","bengali_samvat":1390,"malayalam_era":1159,"nanakshahi_year":514,"lunar_month":"Śrāvaṇa","lunar_month_paksha_full":"Śrāvaṇa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Śrāvaṇa","lunar_month_amanta":"Śrāvaṇa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Siṃha (Āvaṇi)","ritu":"Varṣā (Monsoon)","display_summary":"Śrāvaṇa Śukla Dvādaśī · Vikram 2040 Dhātṛ · Śaka 1905 Rudhirodgāri"},"festivals":[],"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 August 20, 1983 CE · Perth, Australia · Vidhyamitra","description":"August 20, 1983 CE for Perth, Australia: Śukla Dvādaśī, sūryodaya 06:48, sūryāsta 17:51.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1983-08-20","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1983-08-20","sa":"https://sa.vidhyamitra.com/city/perth/1983-08-20","hi":"https://hi.vidhyamitra.com/city/perth/1983-08-20","x-default":"https://vidhyamitra.com/city/perth/1983-08-20"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T06:34:16.786Z","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":"2026-05-31T06:34:16.786Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T06:34:16.786Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}