{"id":"vidhyamitra:city-day:perth:2025-09-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2025-09-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2025-09-18","date_display":"September 18, 2025 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":2025,"month":9,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2460936.770833,"kali_year":5127,"ahargana":1872471.2708,"sun":{"sidereal_longitude":150.3841,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":105.2425,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":27,"name":"Dvādaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvādaśī","elongation_degrees":314.8583,"elapsed_within_tithi_degrees":2.8583},"nakshatra":{"number":8,"name":"Puṣya","pada":4,"moon_longitude":105.2425,"elapsed_within_degrees":11.9091},"yoga":{"number":20,"name":"Śiva","sum_longitude":255.6266},"karana":{"half_tithi_index":52,"name":"Kaulava"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"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":2025,"month":9,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2460936.770833,"ahargana":1872471.2708,"kali_year":5127,"ayanamsa_lahiri":24.2122,"grahas":{"sun":{"sidereal_longitude":151.17897600000003,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":106.71427600000004,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":1},"retrograde":false,"latitude":3.0221},"mars":{"sidereal_longitude":182.55387599999995,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":154.701776,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":86.37517600000001,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":2},"retrograde":false},"venus":{"sidereal_longitude":123.649876,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":334.611976,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":327.4611,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":147.4611,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","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":2025,"month":9,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2460936.770833,"kali_year":5127,"ahargana":1872471.2708,"sun":{"sidereal_longitude":150.3841,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":105.2425,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":27,"name":"Dvādaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvādaśī","elongation_degrees":314.8583,"elapsed_within_tithi_degrees":2.8583},"nakshatra":{"number":8,"name":"Puṣya","pada":4,"moon_longitude":105.2425,"elapsed_within_degrees":11.9091},"yoga":{"number":20,"name":"Śiva","sum_longitude":255.6266},"karana":{"half_tithi_index":52,"name":"Kaulava"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.022,"elongation":45.142},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.022,"opposition_distance":134.858}},"eclipse_window_40days":[{"offset_days":-10,"type":"lunar","occurs":true,"moon_latitude":-0.388,"opposition_distance":2.369}]},"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":"06:11","sunsetLocal":"18:09","solarNoonLocal":"12:10","dayLengthHours":11.978614367051511,"dayLengthDisplay":"11 Hours 58 Mins 43 Secs","nightLengthDisplay":"12 Hours 01 Mins 17 Secs","moonriseLocal":"03:54","moonsetLocal":"14:30","rahuKala":{"name":"Rāhu Kāla","start":"13:40","end":"15:10","startHours":13.663126426320199,"endHours":15.160453222201637,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"06:11","end":"07:40","startHours":6.176492446913004,"endHours":7.673819242794443,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"09:10","end":"10:40","startHours":9.171146038675882,"endHours":10.66847283455732,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:58","end":"09:22","startHours":8.971502465891689,"endHours":9.370789611460074,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:41","end":"07:00","startHours":6.675601378873484,"endHours":6.995031095328191,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:46","end":"12:34","startHours":11.766512484870375,"endHours":12.565086776007142,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:35","end":"05:23","startHours":4.579343864639469,"endHours":5.3779181557762366,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:11","end":"06:11","startHours":5.178274582992045,"endHours":6.176492446913004,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:10","end":"14:58","startHours":14.162235358280679,"endHours":14.960809649417445,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:57","end":"18:21","startHours":17.955106813964516,"endHours":18.355106813964515,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:09","end":"18:39","startHours":18.155106813964515,"endHours":18.654215745924994,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:54","end":"19:39","startHours":17.905106813964515,"endHours":19.655106813964515,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:46","end":"00:34","startHours":23.766512484870375,"endHours":24.565086776007142,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"06:11","end":"07:40","startHours":6.176492446913004,"endHours":7.673819242794443,"quality":"auspicious"},{"name":"Roga","start":"07:40","end":"09:10","startHours":7.673819242794443,"endHours":9.171146038675882,"quality":"inauspicious"},{"name":"Udveg","start":"09:10","end":"10:40","startHours":9.171146038675882,"endHours":10.66847283455732,"quality":"inauspicious"},{"name":"Chala","start":"10:40","end":"12:10","startHours":10.66847283455732,"endHours":12.165799630438759,"quality":"neutral"},{"name":"Labha","start":"12:10","end":"13:40","startHours":12.165799630438759,"endHours":13.663126426320199,"quality":"auspicious"},{"name":"Amṛta","start":"13:40","end":"15:10","startHours":13.663126426320199,"endHours":15.160453222201637,"quality":"auspicious"},{"name":"Kāla","start":"15:10","end":"16:39","startHours":15.160453222201637,"endHours":16.657780018083077,"quality":"inauspicious"},{"name":"Śubha","start":"16:39","end":"18:09","startHours":16.657780018083077,"endHours":18.155106813964515,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"18:09","end":"19:39","startHours":18.155106813964515,"endHours":19.657780018083077,"quality":"auspicious"},{"name":"Kāla","start":"19:39","end":"21:10","startHours":19.657780018083077,"endHours":21.16045322220164,"quality":"inauspicious"},{"name":"Śubha","start":"21:10","end":"22:40","startHours":21.16045322220164,"endHours":22.663126426320197,"quality":"auspicious"},{"name":"Roga","start":"22:40","end":"00:10","startHours":22.663126426320197,"endHours":24.16579963043876,"quality":"inauspicious"},{"name":"Udveg","start":"00:10","end":"01:40","startHours":24.16579963043876,"endHours":25.66847283455732,"quality":"inauspicious"},{"name":"Chala","start":"01:40","end":"03:10","startHours":25.66847283455732,"endHours":27.171146038675882,"quality":"neutral"},{"name":"Labha","start":"03:10","end":"04:40","startHours":27.171146038675882,"endHours":28.673819242794444,"quality":"auspicious"},{"name":"Amṛta","start":"04:40","end":"06:11","startHours":28.673819242794444,"endHours":30.176492446913002,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:11","end":"07:11","startHours":6.176492446913004,"endHours":7.176492446913004,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"07:11","end":"08:11","startHours":7.176492446913004,"endHours":8.176492446913004,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"08:11","end":"09:11","startHours":8.176492446913004,"endHours":9.176492446913004,"planetary_lord":"Moon"},{"name":"Hora 4","start":"09:11","end":"10:11","startHours":9.176492446913004,"endHours":10.176492446913004,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"10:11","end":"11:11","startHours":10.176492446913004,"endHours":11.176492446913004,"planetary_lord":"Venus"},{"name":"Hora 6","start":"11:11","end":"12:11","startHours":11.176492446913004,"endHours":12.176492446913004,"planetary_lord":"Sun"},{"name":"Hora 7","start":"12:11","end":"13:11","startHours":12.176492446913004,"endHours":13.176492446913004,"planetary_lord":"Mars"},{"name":"Hora 8","start":"13:11","end":"14:11","startHours":13.176492446913004,"endHours":14.176492446913004,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"14:11","end":"15:11","startHours":14.176492446913004,"endHours":15.176492446913004,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"15:11","end":"16:11","startHours":15.176492446913004,"endHours":16.176492446913002,"planetary_lord":"Moon"},{"name":"Hora 11","start":"16:11","end":"17:11","startHours":16.176492446913002,"endHours":17.176492446913002,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"17:11","end":"18:11","startHours":17.176492446913002,"endHours":18.176492446913002,"planetary_lord":"Venus"},{"name":"Hora 13","start":"18:11","end":"19:11","startHours":18.176492446913002,"endHours":19.176492446913002,"planetary_lord":"Sun"},{"name":"Hora 14","start":"19:11","end":"20:11","startHours":19.176492446913002,"endHours":20.176492446913002,"planetary_lord":"Mars"},{"name":"Hora 15","start":"20:11","end":"21:11","startHours":20.176492446913002,"endHours":21.176492446913002,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"21:11","end":"22:11","startHours":21.176492446913002,"endHours":22.176492446913002,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"22:11","end":"23:11","startHours":22.176492446913002,"endHours":23.176492446913002,"planetary_lord":"Moon"},{"name":"Hora 18","start":"23:11","end":"00:11","startHours":23.176492446913002,"endHours":24.176492446913002,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"00:11","end":"01:11","startHours":24.176492446913002,"endHours":25.176492446913002,"planetary_lord":"Venus"},{"name":"Hora 20","start":"01:11","end":"02:11","startHours":25.176492446913002,"endHours":26.176492446913002,"planetary_lord":"Sun"},{"name":"Hora 21","start":"02:11","end":"03:11","startHours":26.176492446913002,"endHours":27.176492446913002,"planetary_lord":"Mars"},{"name":"Hora 22","start":"03:11","end":"04:11","startHours":27.176492446913002,"endHours":28.176492446913002,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"04:11","end":"05:11","startHours":28.176492446913002,"endHours":29.176492446913002,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"05:11","end":"06:11","startHours":29.176492446913002,"endHours":30.176492446913002,"planetary_lord":"Moon"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Revatī"],"unfavorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Citrā","Svātī","Viśākhā","Anurādhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Vṛṣabha","Karka","Kanyā","Dhanu","Makara"],"unfavorable_rashis":["Mithuna","Siṃha","Tulā","Vṛścika","Kumbha","Mīna"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"South-West","rahuVasa":"North-West","anandadiYoga":{"name":"Mātaṇga","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":1.831414589021219,"eotMinutes":6.610022173674397,"ayanamsa":24.2122}},"calendars":{"vikram_samvat":2082,"vikram_samvatsara":"Kālayukta","saka_samvat":1947,"saka_samvatsara":"Viśvāvasu","bengali_samvat":1432,"malayalam_era":1201,"nanakshahi_year":556,"lunar_month":"Āśvina","lunar_month_paksha_full":"Āśvina Kṛṣṇa Pakṣa","solar_month":"Kanyā (Puraṭṭāsi)","ritu":"Śarad (Autumn)","display_summary":"Āśvina Kṛṣṇa Dvādaśī · Vikram 2082 Kālayukta · Śaka 1947 Viśvāvasu"},"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":"Kanyā"},"precedence":4}],"todays_walk":{"walk":{"id":"guru-walk","name":"Bṛhaspati Walk","name_sanskrit":"गुरु यात्रा","type":"graha","description":"Wisdom transmission + BG 4.34.","step_count":8,"url":"/walk/guru-walk"},"reason":"Guruvāra (Thursday) — 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 18, 2025 CE · Perth, Australia · Vidhyamitra","description":"September 18, 2025 CE for Perth, Australia: Kṛṣṇa Dvādaśī, sūryodaya 06:11, sūryāsta 18:09.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2025-09-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2025-09-18","sa":"https://sa.vidhyamitra.com/city/perth/2025-09-18","hi":"https://hi.vidhyamitra.com/city/perth/2025-09-18","x-default":"https://vidhyamitra.com/city/perth/2025-09-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T22:43:23.413Z","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":"2026-05-14T22:43:23.413Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T22:43:23.413Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}