{"id":"vidhyamitra:city-day:perth:2171-09-01:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2171-09-01","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2171-09-01","date_display":"September 1, 2171 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":2171,"month":9,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2514244.770833,"kali_year":5273,"ahargana":1925779.2708,"sun":{"sidereal_longitude":131.2383,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":139.817,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":1,"name":"Pratipada","paksha":"Śukla","full_name":"Śukla Pratipada","elongation_degrees":8.5787,"elapsed_within_tithi_degrees":8.5787},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2,"moon_longitude":139.817,"elapsed_within_degrees":6.4837},"yoga":{"number":21,"name":"Siddha","sum_longitude":271.0553},"karana":{"half_tithi_index":1,"name":"Bava"},"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":2171,"month":9,"day":1,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2514244.770833,"ahargana":1925779.2708,"kali_year":5273,"ayanamsa_lahiri":26.251,"grahas":{"sun":{"sidereal_longitude":132.33171800000002,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":142.47611799999999,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false,"latitude":4.0133},"mars":{"sidereal_longitude":95.76511800000003,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":137.484618,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":170.17931799999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"venus":{"sidereal_longitude":146.203818,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":317.70841799999994,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":22.9467,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":202.9467,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","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":2171,"month":9,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2514244.770833,"kali_year":5273,"ahargana":1925779.2708,"sun":{"sidereal_longitude":131.2383,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":139.817,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":1,"name":"Pratipada","paksha":"Śukla","full_name":"Śukla Pratipada","elongation_degrees":8.5787,"elapsed_within_tithi_degrees":8.5787},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2,"moon_longitude":139.817,"elapsed_within_degrees":6.4837},"yoga":{"number":21,"name":"Siddha","sum_longitude":271.0553},"karana":{"half_tithi_index":1,"name":"Bava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.013,"elongation":8.579},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.013,"opposition_distance":171.421}},"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":"06:33","sunsetLocal":"17:59","solarNoonLocal":"12:16","dayLengthHours":11.432388204751273,"dayLengthDisplay":"11 Hours 25 Mins 57 Secs","nightLengthDisplay":"12 Hours 34 Mins 03 Secs","moonriseLocal":"07:05","moonsetLocal":"18:48","rahuKala":{"name":"Rāhu Kāla","start":"16:33","end":"17:59","startHours":16.555178613263838,"endHours":17.984227138857747,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:16","end":"13:42","startHours":12.268033036482109,"endHours":13.697081562076018,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:08","end":"16:33","startHours":15.126130087669928,"endHours":16.555178613263838,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:13","end":"09:36","startHours":9.21939618188177,"endHours":9.600475788706813,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:02","end":"07:20","startHours":7.028188442637776,"endHours":7.33305212809781,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:53","end":"12:39","startHours":11.886953429657067,"endHours":12.649112643307154,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:02","end":"05:47","startHours":5.027520506806304,"endHours":5.789679720456388,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:36","end":"06:33","startHours":5.599139917043867,"endHours":6.551838934106473,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:10","end":"14:56","startHours":14.173431070607322,"endHours":14.935590284257406,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:47","end":"18:11","startHours":17.784227138857748,"endHours":18.184227138857747,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:59","end":"18:28","startHours":17.984227138857747,"endHours":18.46057664738905,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:44","end":"19:29","startHours":17.734227138857747,"endHours":19.484227138857747,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:53","end":"00:39","startHours":23.886953429657066,"endHours":24.649112643307152,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:33","end":"07:59","startHours":6.551838934106473,"endHours":7.980887459700382,"quality":"inauspicious"},{"name":"Chala","start":"07:59","end":"09:25","startHours":7.980887459700382,"endHours":9.409935985294291,"quality":"neutral"},{"name":"Labha","start":"09:25","end":"10:50","startHours":9.409935985294291,"endHours":10.8389845108882,"quality":"auspicious"},{"name":"Amṛta","start":"10:50","end":"12:16","startHours":10.8389845108882,"endHours":12.268033036482109,"quality":"auspicious"},{"name":"Kāla","start":"12:16","end":"13:42","startHours":12.268033036482109,"endHours":13.697081562076018,"quality":"inauspicious"},{"name":"Śubha","start":"13:42","end":"15:08","startHours":13.697081562076018,"endHours":15.126130087669928,"quality":"auspicious"},{"name":"Roga","start":"15:08","end":"16:33","startHours":15.126130087669928,"endHours":16.555178613263838,"quality":"inauspicious"},{"name":"Udveg","start":"16:33","end":"17:59","startHours":16.555178613263838,"endHours":17.984227138857747,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"17:59","end":"19:33","startHours":17.984227138857747,"endHours":19.555178613263838,"quality":"auspicious"},{"name":"Roga","start":"19:33","end":"21:08","startHours":19.555178613263838,"endHours":21.126130087669928,"quality":"inauspicious"},{"name":"Udveg","start":"21:08","end":"22:42","startHours":21.126130087669928,"endHours":22.697081562076022,"quality":"inauspicious"},{"name":"Chala","start":"22:42","end":"00:16","startHours":22.697081562076022,"endHours":24.26803303648211,"quality":"neutral"},{"name":"Labha","start":"00:16","end":"01:50","startHours":24.26803303648211,"endHours":25.838984510888203,"quality":"auspicious"},{"name":"Amṛta","start":"01:50","end":"03:25","startHours":25.838984510888203,"endHours":27.409935985294293,"quality":"auspicious"},{"name":"Kāla","start":"03:25","end":"04:59","startHours":27.409935985294293,"endHours":28.980887459700384,"quality":"inauspicious"},{"name":"Śubha","start":"04:59","end":"06:33","startHours":28.980887459700384,"endHours":30.551838934106474,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:33","end":"07:33","startHours":6.551838934106473,"endHours":7.551838934106473,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:33","end":"08:33","startHours":7.551838934106473,"endHours":8.551838934106474,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:33","end":"09:33","startHours":8.551838934106474,"endHours":9.551838934106474,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:33","end":"10:33","startHours":9.551838934106474,"endHours":10.551838934106474,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:33","end":"11:33","startHours":10.551838934106474,"endHours":11.551838934106474,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:33","end":"12:33","startHours":11.551838934106474,"endHours":12.551838934106474,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:33","end":"13:33","startHours":12.551838934106474,"endHours":13.551838934106474,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:33","end":"14:33","startHours":13.551838934106474,"endHours":14.551838934106474,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:33","end":"15:33","startHours":14.551838934106474,"endHours":15.551838934106474,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:33","end":"16:33","startHours":15.551838934106474,"endHours":16.551838934106474,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:33","end":"17:33","startHours":16.551838934106474,"endHours":17.551838934106474,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:33","end":"18:33","startHours":17.551838934106474,"endHours":18.551838934106474,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:33","end":"19:33","startHours":18.551838934106474,"endHours":19.551838934106474,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:33","end":"20:33","startHours":19.551838934106474,"endHours":20.551838934106474,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:33","end":"21:33","startHours":20.551838934106474,"endHours":21.551838934106474,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:33","end":"22:33","startHours":21.551838934106474,"endHours":22.551838934106474,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:33","end":"23:33","startHours":22.551838934106474,"endHours":23.551838934106474,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:33","end":"00:33","startHours":23.551838934106474,"endHours":24.551838934106474,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:33","end":"01:33","startHours":24.551838934106474,"endHours":25.551838934106474,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:33","end":"02:33","startHours":25.551838934106474,"endHours":26.551838934106474,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:33","end":"03:33","startHours":26.551838934106474,"endHours":27.551838934106474,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:33","end":"04:33","startHours":27.551838934106474,"endHours":28.551838934106474,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:33","end":"05:33","startHours":28.551838934106474,"endHours":29.551838934106474,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:33","end":"06:33","startHours":29.551838934106474,"endHours":30.551838934106474,"planetary_lord":"Jupiter"}],"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","Siṃha","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Kanyā","Vṛścika","Dhanu","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"West","rahuVasa":"North-East","anandadiYoga":{"name":"Chatra","quality":"Auspicious"},"tropicalRitu":"Varṣā (Monsoon) (tropical)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":8.350889545764655,"eotMinutes":0.47601781107335894,"ayanamsa":26.251}},"calendars":{"vikram_samvat":2228,"vikram_samvatsara":"Tāraṇa","saka_samvat":2093,"saka_samvatsara":"Prajāpati","bengali_samvat":1578,"malayalam_era":1347,"nanakshahi_year":702,"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":"Siṃha (Āvaṇi)","ritu":"Varṣā (Monsoon)","display_summary":"Bhādrapada Śukla Pratipada · Vikram 2228 Tāraṇa · Śaka 2093 Prajāpati"},"festivals":[],"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":[]},"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 1, 2171 CE · Perth, Australia · Vidhyamitra","description":"September 1, 2171 CE for Perth, Australia: Śukla Pratipada, sūryodaya 06:33, sūryāsta 17:59.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2171-09-01","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2171-09-01","sa":"https://sa.vidhyamitra.com/city/perth/2171-09-01","hi":"https://hi.vidhyamitra.com/city/perth/2171-09-01","x-default":"https://vidhyamitra.com/city/perth/2171-09-01"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T05:30:50.131Z","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":"2026-06-01T05:30:50.131Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T05:30:50.131Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}