{"id":"vidhyamitra:city-day:perth:2021-08-17:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2021-08-17","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2021-08-17","date_display":"August 17, 2021 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":2021,"month":8,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2459443.770833,"kali_year":5123,"ahargana":1870978.2708,"sun":{"sidereal_longitude":119.5478,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":229.0687,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":10,"name":"Daśamī","paksha":"Śukla","full_name":"Śukla Daśamī","elongation_degrees":109.5209,"elapsed_within_tithi_degrees":1.5209},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1,"moon_longitude":229.0687,"elapsed_within_degrees":2.402},"yoga":{"number":27,"name":"Vaidhṛti","sum_longitude":348.6165},"karana":{"half_tithi_index":18,"name":"Taitila"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"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":2021,"month":8,"day":17,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2459443.770833,"ahargana":1870978.2708,"kali_year":5123,"ayanamsa_lahiri":24.1551,"grahas":{"sun":{"sidereal_longitude":120.22291899999999,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":228.770219,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"retrograde":false,"latitude":-0.1962},"mars":{"sidereal_longitude":136.983519,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":134.719919,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":303.428319,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":true},"venus":{"sidereal_longitude":156.54821900000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":284.976319,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":46.5674,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":226.5674,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","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":2021,"month":8,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2459443.770833,"kali_year":5123,"ahargana":1870978.2708,"sun":{"sidereal_longitude":119.5478,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":229.0687,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":10,"name":"Daśamī","paksha":"Śukla","full_name":"Śukla Daśamī","elongation_degrees":109.5209,"elapsed_within_tithi_degrees":1.5209},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1,"moon_longitude":229.0687,"elapsed_within_degrees":2.402},"yoga":{"number":27,"name":"Vaidhṛti","sum_longitude":348.6165},"karana":{"half_tithi_index":18,"name":"Taitila"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-0.196,"elongation":109.521},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-0.196,"opposition_distance":70.479}},"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":"06:50","sunsetLocal":"17:50","solarNoonLocal":"12:20","dayLengthHours":10.9971051224046,"dayLengthDisplay":"10 Hours 59 Mins 50 Secs","nightLengthDisplay":"13 Hours 00 Mins 10 Secs","moonriseLocal":"12:32","moonsetLocal":"02:37","rahuKala":{"name":"Rāhu Kāla","start":"15:05","end":"16:28","startHours":15.087802639836449,"endHours":16.462440780137023,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:35","end":"10:58","startHours":9.589250078634148,"endHours":10.963888218934724,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:20","end":"13:43","startHours":12.3385263592353,"endHours":13.713164499535873,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:24","end":"09:46","startHours":9.405964993260739,"endHours":9.772535164007557,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:18","end":"07:35","startHours":7.298186511466524,"endHours":7.59144264806398,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:58","end":"12:42","startHours":11.971956188488479,"endHours":12.70509652998212,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:22","end":"06:06","startHours":5.373693115045718,"endHours":6.106833456539358,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:55","end":"06:50","startHours":5.923548371165948,"endHours":6.839973798032998,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:10","end":"14:54","startHours":14.171377212969398,"endHours":14.904517554463037,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:38","end":"18:02","startHours":17.6370789204376,"endHours":18.037078920437597,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:50","end":"18:18","startHours":17.837078920437598,"endHours":18.295291633871123,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:35","end":"19:20","startHours":17.587078920437598,"endHours":19.337078920437598,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:58","end":"00:42","startHours":23.97195618848848,"endHours":24.705096529982118,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"06:50","end":"08:13","startHours":6.839973798032998,"endHours":8.214611938333574,"quality":"inauspicious"},{"name":"Udveg","start":"08:13","end":"09:35","startHours":8.214611938333574,"endHours":9.589250078634148,"quality":"inauspicious"},{"name":"Chala","start":"09:35","end":"10:58","startHours":9.589250078634148,"endHours":10.963888218934724,"quality":"neutral"},{"name":"Labha","start":"10:58","end":"12:20","startHours":10.963888218934724,"endHours":12.3385263592353,"quality":"auspicious"},{"name":"Amṛta","start":"12:20","end":"13:43","startHours":12.3385263592353,"endHours":13.713164499535873,"quality":"auspicious"},{"name":"Kāla","start":"13:43","end":"15:05","startHours":13.713164499535873,"endHours":15.087802639836449,"quality":"inauspicious"},{"name":"Śubha","start":"15:05","end":"16:28","startHours":15.087802639836449,"endHours":16.462440780137023,"quality":"auspicious"},{"name":"Roga","start":"16:28","end":"17:50","startHours":16.462440780137023,"endHours":17.837078920437598,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"17:50","end":"19:28","startHours":17.837078920437598,"endHours":19.462440780137023,"quality":"inauspicious"},{"name":"Śubha","start":"19:28","end":"21:05","startHours":19.462440780137023,"endHours":21.087802639836447,"quality":"auspicious"},{"name":"Roga","start":"21:05","end":"22:43","startHours":21.087802639836447,"endHours":22.71316449953587,"quality":"inauspicious"},{"name":"Udveg","start":"22:43","end":"00:20","startHours":22.71316449953587,"endHours":24.3385263592353,"quality":"inauspicious"},{"name":"Chala","start":"00:20","end":"01:58","startHours":24.3385263592353,"endHours":25.963888218934724,"quality":"neutral"},{"name":"Labha","start":"01:58","end":"03:35","startHours":25.963888218934724,"endHours":27.589250078634148,"quality":"auspicious"},{"name":"Amṛta","start":"03:35","end":"05:13","startHours":27.589250078634148,"endHours":29.214611938333576,"quality":"auspicious"},{"name":"Kāla","start":"05:13","end":"06:50","startHours":29.214611938333576,"endHours":30.839973798033,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:50","end":"07:50","startHours":6.839973798032998,"endHours":7.839973798032998,"planetary_lord":"Mars"},{"name":"Hora 2","start":"07:50","end":"08:50","startHours":7.839973798032998,"endHours":8.839973798032998,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"08:50","end":"09:50","startHours":8.839973798032998,"endHours":9.839973798032998,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"09:50","end":"10:50","startHours":9.839973798032998,"endHours":10.839973798032998,"planetary_lord":"Moon"},{"name":"Hora 5","start":"10:50","end":"11:50","startHours":10.839973798032998,"endHours":11.839973798032998,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"11:50","end":"12:50","startHours":11.839973798032998,"endHours":12.839973798032998,"planetary_lord":"Venus"},{"name":"Hora 7","start":"12:50","end":"13:50","startHours":12.839973798032998,"endHours":13.839973798032998,"planetary_lord":"Sun"},{"name":"Hora 8","start":"13:50","end":"14:50","startHours":13.839973798032998,"endHours":14.839973798032998,"planetary_lord":"Mars"},{"name":"Hora 9","start":"14:50","end":"15:50","startHours":14.839973798032998,"endHours":15.839973798032998,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"15:50","end":"16:50","startHours":15.839973798032998,"endHours":16.839973798033,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"16:50","end":"17:50","startHours":16.839973798033,"endHours":17.839973798033,"planetary_lord":"Moon"},{"name":"Hora 12","start":"17:50","end":"18:50","startHours":17.839973798033,"endHours":18.839973798033,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"18:50","end":"19:50","startHours":18.839973798033,"endHours":19.839973798033,"planetary_lord":"Venus"},{"name":"Hora 14","start":"19:50","end":"20:50","startHours":19.839973798033,"endHours":20.839973798033,"planetary_lord":"Sun"},{"name":"Hora 15","start":"20:50","end":"21:50","startHours":20.839973798033,"endHours":21.839973798033,"planetary_lord":"Mars"},{"name":"Hora 16","start":"21:50","end":"22:50","startHours":21.839973798033,"endHours":22.839973798033,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"22:50","end":"23:50","startHours":22.839973798033,"endHours":23.839973798033,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"23:50","end":"00:50","startHours":23.839973798033,"endHours":24.839973798033,"planetary_lord":"Moon"},{"name":"Hora 19","start":"00:50","end":"01:50","startHours":24.839973798033,"endHours":25.839973798033,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"01:50","end":"02:50","startHours":25.839973798033,"endHours":26.839973798033,"planetary_lord":"Venus"},{"name":"Hora 21","start":"02:50","end":"03:50","startHours":26.839973798033,"endHours":27.839973798033,"planetary_lord":"Sun"},{"name":"Hora 22","start":"03:50","end":"04:50","startHours":27.839973798033,"endHours":28.839973798033,"planetary_lord":"Mars"},{"name":"Hora 23","start":"04:50","end":"05:50","startHours":28.839973798033,"endHours":29.839973798033,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"05:50","end":"06:50","startHours":29.839973798033,"endHours":30.839973798033,"planetary_lord":"Saturn"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"unfavorable_nakshatras":["Ārdrā","Punarvasu","Puṣya","Aśleṣā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Vṛścika","Makara"],"unfavorable_rashis":["Mithuna","Karka","Tulā","Dhanu","Kumbha","Mīna"]},"dishaShool":"North (Uttara)","chandraVasa":"North-East","rahuVasa":"North","anandadiYoga":{"name":"Cara","quality":"Auspicious"},"drikRitu":"Varṣā (Monsoon)","vedicRitu":"Varṣā (Monsoon)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":13.394425203207334,"eotMinutes":-3.7535815541179196,"ayanamsa":24.1551}},"calendars":{"vikram_samvat":2078,"vikram_samvatsara":"Ānanda","saka_samvat":1943,"saka_samvatsara":"Plava","bengali_samvat":1428,"malayalam_era":1197,"nanakshahi_year":552,"lunar_month":"Bhādrapada","lunar_month_paksha_full":"Bhādrapada Śukla Pakṣa","solar_month":"Siṃha (Āvaṇi)","ritu":"Varṣā (Monsoon)","display_summary":"Bhādrapada Śukla Daśamī · Vikram 2078 Ānanda · Śaka 1943 Plava"},"festivals":[{"id":"simha-sankranti","name":"Siṁha Saṅkrānti","name_sanskrit":"सिंह सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Leo.","vrata":false,"detection":{"sun_rashi":"Siṃha"},"precedence":5}],"todays_walk":{"walk":{"id":"mangala-walk","name":"Maṅgala Walk","name_sanskrit":"मङ्गल यात्रा","type":"graha","description":"Right action + BG 2.31-38 (kṣatriya-dharma).","step_count":7,"url":"/walk/mangala-walk"},"reason":"Maṅgalavāra (Tuesday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3137-10-20","event":"Karṇa-Vadha (Mahābhārata Day 17)","chart_id":"karna","shared_marker":"same Jyeṣṭhā","url":"/day/-3137-10-20","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 August 17, 2021 CE · Perth, Australia · Vidhyamitra","description":"August 17, 2021 CE for Perth, Australia: Śukla Daśamī, sūryodaya 06:50, sūryāsta 17:50.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2021-08-17","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2021-08-17","sa":"https://sa.vidhyamitra.com/city/perth/2021-08-17","hi":"https://hi.vidhyamitra.com/city/perth/2021-08-17","x-default":"https://vidhyamitra.com/city/perth/2021-08-17"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-15T06:27:40.560Z","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":"2026-05-15T06:27:40.560Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-15T06:27:40.560Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}