{"id":"vidhyamitra:city-day:perth:2178-09-20:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2178-09-20","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2178-09-20","date_display":"September 20, 2178 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":2178,"month":9,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2516820.770833,"kali_year":5280,"ahargana":1928355.2708,"sun":{"sidereal_longitude":149.8098,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":251.22,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":101.4102,"elapsed_within_tithi_degrees":5.4102},"nakshatra":{"number":19,"name":"Mūla","pada":4,"moon_longitude":251.22,"elapsed_within_degrees":11.22},"yoga":{"number":4,"name":"Saubhāgya","sum_longitude":41.0298},"karana":{"half_tithi_index":16,"name":"Bālava"},"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":2178,"month":9,"day":20,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2516820.770833,"ahargana":1928355.2708,"kali_year":5280,"ayanamsa_lahiri":26.3496,"grahas":{"sun":{"sidereal_longitude":150.97639600000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":254.62069599999995,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":1},"retrograde":false,"latitude":0.3732},"mars":{"sidereal_longitude":7.7702959999999734,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":3},"retrograde":true},"mercury":{"sidereal_longitude":172.47189600000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":46.904696,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":3},"retrograde":false},"venus":{"sidereal_longitude":132.257696,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":53.840596000000005,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":246.4579,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":66.4579,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","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":2178,"month":9,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2516820.770833,"kali_year":5280,"ahargana":1928355.2708,"sun":{"sidereal_longitude":149.8098,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":251.22,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":101.4102,"elapsed_within_tithi_degrees":5.4102},"nakshatra":{"number":19,"name":"Mūla","pada":4,"moon_longitude":251.22,"elapsed_within_degrees":11.22},"yoga":{"number":4,"name":"Saubhāgya","sum_longitude":41.0298},"karana":{"half_tithi_index":16,"name":"Bālava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":0.373,"elongation":101.41},"lunar":{"type":"lunar","occurs":false,"moon_latitude":0.373,"opposition_distance":78.59}},"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":"06:08","sunsetLocal":"18:10","solarNoonLocal":"12:09","dayLengthHours":12.042492422936244,"dayLengthDisplay":"12 Hours 02 Mins 33 Secs","nightLengthDisplay":"11 Hours 57 Mins 27 Secs","moonriseLocal":"11:59","moonsetLocal":"02:08","rahuKala":{"name":"Rāhu Kāla","start":"16:40","end":"18:10","startHours":16.66945274590852,"endHours":18.17476429877555,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:09","end":"13:40","startHours":12.153518087307429,"endHours":13.658829640174458,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:10","end":"16:40","startHours":15.16414119304149,"endHours":16.66945274590852,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:57","end":"09:21","startHours":8.94218677452443,"endHours":9.343603188622303,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:38","end":"06:57","startHours":6.63404239346165,"endHours":6.95517552473995,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:45","end":"12:33","startHours":11.752101673209552,"endHours":12.554934501405302,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:32","end":"05:20","startHours":4.526606219447807,"endHours":5.3294390476435565,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:08","end":"06:08","startHours":5.128730840594619,"endHours":6.132271875839306,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:10","end":"14:58","startHours":14.160600157796802,"endHours":14.96343298599255,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:58","end":"18:22","startHours":17.97476429877555,"endHours":18.37476429877555,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:10","end":"18:41","startHours":18.17476429877555,"endHours":18.676534816397893,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:55","end":"19:40","startHours":17.92476429877555,"endHours":19.67476429877555,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:45","end":"00:33","startHours":23.752101673209552,"endHours":24.5549345014053,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:08","end":"07:38","startHours":6.132271875839306,"endHours":7.637583428706336,"quality":"inauspicious"},{"name":"Chala","start":"07:38","end":"09:09","startHours":7.637583428706336,"endHours":9.142894981573367,"quality":"neutral"},{"name":"Labha","start":"09:09","end":"10:39","startHours":9.142894981573367,"endHours":10.648206534440398,"quality":"auspicious"},{"name":"Amṛta","start":"10:39","end":"12:09","startHours":10.648206534440398,"endHours":12.153518087307429,"quality":"auspicious"},{"name":"Kāla","start":"12:09","end":"13:40","startHours":12.153518087307429,"endHours":13.658829640174458,"quality":"inauspicious"},{"name":"Śubha","start":"13:40","end":"15:10","startHours":13.658829640174458,"endHours":15.16414119304149,"quality":"auspicious"},{"name":"Roga","start":"15:10","end":"16:40","startHours":15.16414119304149,"endHours":16.66945274590852,"quality":"inauspicious"},{"name":"Udveg","start":"16:40","end":"18:10","startHours":16.66945274590852,"endHours":18.17476429877555,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:10","end":"19:40","startHours":18.17476429877555,"endHours":19.66945274590852,"quality":"auspicious"},{"name":"Roga","start":"19:40","end":"21:10","startHours":19.66945274590852,"endHours":21.164141193041488,"quality":"inauspicious"},{"name":"Udveg","start":"21:10","end":"22:40","startHours":21.164141193041488,"endHours":22.65882964017446,"quality":"inauspicious"},{"name":"Chala","start":"22:40","end":"00:09","startHours":22.65882964017446,"endHours":24.15351808730743,"quality":"neutral"},{"name":"Labha","start":"00:09","end":"01:39","startHours":24.15351808730743,"endHours":25.648206534440398,"quality":"auspicious"},{"name":"Amṛta","start":"01:39","end":"03:09","startHours":25.648206534440398,"endHours":27.142894981573367,"quality":"auspicious"},{"name":"Kāla","start":"03:09","end":"04:38","startHours":27.142894981573367,"endHours":28.637583428706336,"quality":"inauspicious"},{"name":"Śubha","start":"04:38","end":"06:08","startHours":28.637583428706336,"endHours":30.132271875839308,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:08","end":"07:08","startHours":6.132271875839306,"endHours":7.132271875839306,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:08","end":"08:08","startHours":7.132271875839306,"endHours":8.132271875839306,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:08","end":"09:08","startHours":8.132271875839306,"endHours":9.132271875839306,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:08","end":"10:08","startHours":9.132271875839306,"endHours":10.132271875839306,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:08","end":"11:08","startHours":10.132271875839306,"endHours":11.132271875839306,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:08","end":"12:08","startHours":11.132271875839306,"endHours":12.132271875839306,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:08","end":"13:08","startHours":12.132271875839306,"endHours":13.132271875839306,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:08","end":"14:08","startHours":13.132271875839306,"endHours":14.132271875839306,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:08","end":"15:08","startHours":14.132271875839306,"endHours":15.132271875839306,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:08","end":"16:08","startHours":15.132271875839306,"endHours":16.132271875839308,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:08","end":"17:08","startHours":16.132271875839308,"endHours":17.132271875839308,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:08","end":"18:08","startHours":17.132271875839308,"endHours":18.132271875839308,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:08","end":"19:08","startHours":18.132271875839308,"endHours":19.132271875839308,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:08","end":"20:08","startHours":19.132271875839308,"endHours":20.132271875839308,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:08","end":"21:08","startHours":20.132271875839308,"endHours":21.132271875839308,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:08","end":"22:08","startHours":21.132271875839308,"endHours":22.132271875839308,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:08","end":"23:08","startHours":22.132271875839308,"endHours":23.132271875839308,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:08","end":"00:08","startHours":23.132271875839308,"endHours":24.132271875839308,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:08","end":"01:08","startHours":24.132271875839308,"endHours":25.132271875839308,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:08","end":"02:08","startHours":25.132271875839308,"endHours":26.132271875839308,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:08","end":"03:08","startHours":26.132271875839308,"endHours":27.132271875839308,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:08","end":"04:08","startHours":27.132271875839308,"endHours":28.132271875839308,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:08","end":"05:08","startHours":28.132271875839308,"endHours":29.132271875839308,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:08","end":"06:08","startHours":29.132271875839308,"endHours":30.132271875839308,"planetary_lord":"Jupiter"}],"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":["Vṛṣabha","Mithuna","Kanyā","Tulā","Dhanu","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Makara","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"East","rahuVasa":"North-East","anandadiYoga":{"name":"Siddhi","quality":"Auspicious"},"tropicalRitu":"Varṣā (Monsoon)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":1.063213169003529,"eotMinutes":7.346914761554353,"ayanamsa":26.3496}},"calendars":{"vikram_samvat":2235,"vikram_samvatsara":"Khara","saka_samvat":2100,"saka_samvatsara":"Bahudhānya","bengali_samvat":1585,"malayalam_era":1354,"nanakshahi_year":709,"lunar_month":"Bhādrapada","lunar_month_paksha_full":"Bhādrapada Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Bhādrapada","lunar_month_amanta":"Bhādrapada","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Kanyā (Puraṭṭāsi)","ritu":"Varṣā (Monsoon)","display_summary":"Bhādrapada Śukla Navamī · Vikram 2235 Khara · Śaka 2100 Bahudhānya"},"festivals":[{"id":"kanya-sankranti","name":"Kanyā Saṅkrānti (Mahālaya begins)","name_sanskrit":"कन्या सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Virgo; Mahālaya / Pitṛ-Pakṣa solar marker.","vrata":false,"detection":{"sun_rashi_ingress":"Kanyā"},"precedence":4}],"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":"-1626101-04-03","event":"Bhagavān Rāma's birth at Ayodhyā","chart_id":"rama","shared_marker":"same Śukla Navamī","url":"/day/-1626101-04-03","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 September 20, 2178 CE · Perth, Australia · Vidhyamitra","description":"September 20, 2178 CE for Perth, Australia: Śukla Navamī, sūryodaya 06:08, sūryāsta 18:10.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2178-09-20","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2178-09-20","sa":"https://sa.vidhyamitra.com/city/perth/2178-09-20","hi":"https://hi.vidhyamitra.com/city/perth/2178-09-20","x-default":"https://vidhyamitra.com/city/perth/2178-09-20"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T21:05:13.563Z","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":"2026-05-31T21:05:13.563Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T21:05:13.563Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}