{"id":"vidhyamitra:city-day:perth:2129-09-17:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2129-09-17","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2129-09-17","date_display":"September 17, 2129 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":2129,"month":9,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2498920.770833,"kali_year":5231,"ahargana":1910455.2708,"sun":{"sidereal_longitude":147.5516,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":187.4481,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":39.8965,"elapsed_within_tithi_degrees":3.8965},"nakshatra":{"number":15,"name":"Svātī","pada":1,"moon_longitude":187.4481,"elapsed_within_degrees":0.7815},"yoga":{"number":26,"name":"Indra","sum_longitude":334.9998},"karana":{"half_tithi_index":6,"name":"Vaṇija"},"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":2129,"month":9,"day":17,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2498920.770833,"ahargana":1910455.2708,"kali_year":5231,"ayanamsa_lahiri":25.6649,"grahas":{"sun":{"sidereal_longitude":148.59440800000004,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":186.02650800000004,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":4},"retrograde":false,"latitude":4.2928},"mars":{"sidereal_longitude":293.96800800000005,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":131.13020800000004,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":349.431208,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":1},"retrograde":true},"venus":{"sidereal_longitude":126.72800800000005,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":174.060108,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":114.886,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":294.886,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","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":2129,"month":9,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2498920.770833,"kali_year":5231,"ahargana":1910455.2708,"sun":{"sidereal_longitude":147.5516,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":187.4481,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":39.8965,"elapsed_within_tithi_degrees":3.8965},"nakshatra":{"number":15,"name":"Svātī","pada":1,"moon_longitude":187.4481,"elapsed_within_degrees":0.7815},"yoga":{"number":26,"name":"Indra","sum_longitude":334.9998},"karana":{"half_tithi_index":6,"name":"Vaṇija"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.293,"elongation":39.897},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.293,"opposition_distance":140.103}},"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":"06:12","sunsetLocal":"18:09","solarNoonLocal":"12:10","dayLengthHours":11.941296304696804,"dayLengthDisplay":"11 Hours 56 Mins 29 Secs","nightLengthDisplay":"12 Hours 03 Mins 31 Secs","moonriseLocal":"08:07","moonsetLocal":"21:14","rahuKala":{"name":"Rāhu Kāla","start":"09:11","end":"10:41","startHours":9.186649861236335,"endHours":10.679311899323434,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:40","end":"15:09","startHours":13.664635975497635,"endHours":15.157298013584736,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:12","end":"07:42","startHours":6.201325785062133,"endHours":7.693987823149234,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:59","end":"09:23","startHours":8.987628256158054,"endHours":9.385671466314614,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:42","end":"07:01","startHours":6.698879797757834,"endHours":7.017314365883082,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:46","end":"12:34","startHours":11.773930727253976,"endHours":12.570017147567096,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:37","end":"05:24","startHours":4.609152944435893,"endHours":5.405239364749013,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:12","end":"06:12","startHours":5.206217759670733,"endHours":6.201325785062133,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:10","end":"14:57","startHours":14.162189988193337,"endHours":14.958276408506457,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:57","end":"18:21","startHours":17.942622089758938,"endHours":18.342622089758937,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:09","end":"18:38","startHours":18.142622089758937,"endHours":18.64017610245464,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:54","end":"19:39","startHours":17.892622089758937,"endHours":19.642622089758937,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:46","end":"00:34","startHours":23.773930727253973,"endHours":24.570017147567096,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"06:12","end":"07:42","startHours":6.201325785062133,"endHours":7.693987823149234,"quality":"inauspicious"},{"name":"Śubha","start":"07:42","end":"09:11","startHours":7.693987823149234,"endHours":9.186649861236335,"quality":"auspicious"},{"name":"Roga","start":"09:11","end":"10:41","startHours":9.186649861236335,"endHours":10.679311899323434,"quality":"inauspicious"},{"name":"Udveg","start":"10:41","end":"12:10","startHours":10.679311899323434,"endHours":12.171973937410534,"quality":"inauspicious"},{"name":"Chala","start":"12:10","end":"13:40","startHours":12.171973937410534,"endHours":13.664635975497635,"quality":"neutral"},{"name":"Labha","start":"13:40","end":"15:09","startHours":13.664635975497635,"endHours":15.157298013584736,"quality":"auspicious"},{"name":"Amṛta","start":"15:09","end":"16:39","startHours":15.157298013584736,"endHours":16.649960051671837,"quality":"auspicious"},{"name":"Kāla","start":"16:39","end":"18:09","startHours":16.649960051671837,"endHours":18.142622089758937,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:09","end":"19:39","startHours":18.142622089758937,"endHours":19.649960051671837,"quality":"auspicious"},{"name":"Amṛta","start":"19:39","end":"21:09","startHours":19.649960051671837,"endHours":21.157298013584736,"quality":"auspicious"},{"name":"Kāla","start":"21:09","end":"22:40","startHours":21.157298013584736,"endHours":22.664635975497635,"quality":"inauspicious"},{"name":"Śubha","start":"22:40","end":"00:10","startHours":22.664635975497635,"endHours":24.171973937410534,"quality":"auspicious"},{"name":"Roga","start":"00:10","end":"01:41","startHours":24.171973937410534,"endHours":25.679311899323434,"quality":"inauspicious"},{"name":"Udveg","start":"01:41","end":"03:11","startHours":25.679311899323434,"endHours":27.186649861236333,"quality":"inauspicious"},{"name":"Chala","start":"03:11","end":"04:42","startHours":27.186649861236333,"endHours":28.693987823149236,"quality":"neutral"},{"name":"Labha","start":"04:42","end":"06:12","startHours":28.693987823149236,"endHours":30.20132578506213,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:12","end":"07:12","startHours":6.201325785062133,"endHours":7.201325785062133,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"07:12","end":"08:12","startHours":7.201325785062133,"endHours":8.201325785062133,"planetary_lord":"Moon"},{"name":"Hora 3","start":"08:12","end":"09:12","startHours":8.201325785062133,"endHours":9.201325785062133,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"09:12","end":"10:12","startHours":9.201325785062133,"endHours":10.201325785062133,"planetary_lord":"Venus"},{"name":"Hora 5","start":"10:12","end":"11:12","startHours":10.201325785062133,"endHours":11.201325785062133,"planetary_lord":"Sun"},{"name":"Hora 6","start":"11:12","end":"12:12","startHours":11.201325785062133,"endHours":12.201325785062133,"planetary_lord":"Mars"},{"name":"Hora 7","start":"12:12","end":"13:12","startHours":12.201325785062133,"endHours":13.201325785062133,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"13:12","end":"14:12","startHours":13.201325785062133,"endHours":14.201325785062133,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"14:12","end":"15:12","startHours":14.201325785062133,"endHours":15.201325785062133,"planetary_lord":"Moon"},{"name":"Hora 10","start":"15:12","end":"16:12","startHours":15.201325785062133,"endHours":16.20132578506213,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"16:12","end":"17:12","startHours":16.20132578506213,"endHours":17.20132578506213,"planetary_lord":"Venus"},{"name":"Hora 12","start":"17:12","end":"18:12","startHours":17.20132578506213,"endHours":18.20132578506213,"planetary_lord":"Sun"},{"name":"Hora 13","start":"18:12","end":"19:12","startHours":18.20132578506213,"endHours":19.20132578506213,"planetary_lord":"Mars"},{"name":"Hora 14","start":"19:12","end":"20:12","startHours":19.20132578506213,"endHours":20.20132578506213,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"20:12","end":"21:12","startHours":20.20132578506213,"endHours":21.20132578506213,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"21:12","end":"22:12","startHours":21.20132578506213,"endHours":22.20132578506213,"planetary_lord":"Moon"},{"name":"Hora 17","start":"22:12","end":"23:12","startHours":22.20132578506213,"endHours":23.20132578506213,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"23:12","end":"00:12","startHours":23.20132578506213,"endHours":24.20132578506213,"planetary_lord":"Venus"},{"name":"Hora 19","start":"00:12","end":"01:12","startHours":24.20132578506213,"endHours":25.20132578506213,"planetary_lord":"Sun"},{"name":"Hora 20","start":"01:12","end":"02:12","startHours":25.20132578506213,"endHours":26.20132578506213,"planetary_lord":"Mars"},{"name":"Hora 21","start":"02:12","end":"03:12","startHours":26.20132578506213,"endHours":27.20132578506213,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"03:12","end":"04:12","startHours":27.20132578506213,"endHours":28.20132578506213,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"04:12","end":"05:12","startHours":28.20132578506213,"endHours":29.20132578506213,"planetary_lord":"Moon"},{"name":"Hora 24","start":"05:12","end":"06:12","startHours":29.20132578506213,"endHours":30.20132578506213,"planetary_lord":"Mercury"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Punarvasu","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Uttara Phalgunī","Hasta","Citrā","Svātī","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Karka","Siṃha","Tulā","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Vṛścika","Makara","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"North","rahuVasa":"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":2.2800429900065735,"eotMinutes":6.239563755367786,"ayanamsa":25.6649}},"calendars":{"vikram_samvat":2186,"vikram_samvatsara":"Śubhakṛt","saka_samvat":2051,"saka_samvatsara":"Virodhi","bengali_samvat":1536,"malayalam_era":1305,"nanakshahi_year":660,"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 Caturthī · Vikram 2186 Śubhakṛt · Śaka 2051 Virodhi"},"festivals":[{"id":"ganesha-chaturthi","name":"Gaṇeśa Caturthī","name_sanskrit":"गणेश चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Gaṇeśa's birth day; 11-day festival in Maharashtra.","vrata":false,"detection":{"tithi_number":4,"tithi_paksha":"Śukla","lunar_month":"Bhādrapada"},"precedence":1},{"id":"vinayaka-chaturthi","name":"Vināyaka Caturthī (monthly)","name_sanskrit":"विनायक चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Śukla-pakṣa Caturthī; auspicious for new ventures.","vrata":true,"detection":{"tithi_number":4,"tithi_paksha":"Śukla"},"precedence":6}],"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 September 17, 2129 CE · Perth, Australia · Vidhyamitra","description":"September 17, 2129 CE for Perth, Australia: Śukla Caturthī, sūryodaya 06:12, sūryāsta 18:09.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2129-09-17","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2129-09-17","sa":"https://sa.vidhyamitra.com/city/perth/2129-09-17","hi":"https://hi.vidhyamitra.com/city/perth/2129-09-17","x-default":"https://vidhyamitra.com/city/perth/2129-09-17"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T16:51:16.211Z","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":"2026-05-31T16:51:16.211Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T16:51:16.211Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}