{"id":"vidhyamitra:city-day:perth:2018-10-12:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2018-10-12","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2018-10-12","date_display":"October 12, 2018 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":2018,"month":10,"day":12,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2458403.770833,"kali_year":5120,"ahargana":1869938.2708,"sun":{"sidereal_longitude":173.7702,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":211.4578,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":37.6876,"elapsed_within_tithi_degrees":1.6876},"nakshatra":{"number":16,"name":"Viśākhā","pada":4,"moon_longitude":211.4578,"elapsed_within_degrees":11.4578},"yoga":{"number":2,"name":"Prīti","sum_longitude":25.228},"karana":{"half_tithi_index":6,"name":"Vaṇija"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"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":2018,"month":10,"day":12,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2458403.770833,"ahargana":1869938.2708,"kali_year":5120,"ayanamsa_lahiri":24.1153,"grahas":{"sun":{"sidereal_longitude":174.55505500000004,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":211.00365499999998,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","pada":4},"retrograde":false,"latitude":4.2338},"mars":{"sidereal_longitude":286.33265499999993,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":188.640355,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":210.02375499999994,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":195.84215500000005,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":3},"retrograde":true},"saturn":{"sidereal_longitude":249.33295499999997,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":101.6716,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":281.6716,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":2018,"month":10,"day":12,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2458403.770833,"kali_year":5120,"ahargana":1869938.2708,"sun":{"sidereal_longitude":173.7702,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":211.4578,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":37.6876,"elapsed_within_tithi_degrees":1.6876},"nakshatra":{"number":16,"name":"Viśākhā","pada":4,"moon_longitude":211.4578,"elapsed_within_degrees":11.4578},"yoga":{"number":2,"name":"Prīti","sum_longitude":25.228},"karana":{"half_tithi_index":6,"name":"Vaṇija"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.234,"elongation":37.688},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.234,"opposition_distance":142.312}},"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":"05:40","sunsetLocal":"18:25","solarNoonLocal":"12:02","dayLengthHours":12.744751881887897,"dayLengthDisplay":"12 Hours 44 Mins 41 Secs","nightLengthDisplay":"11 Hours 15 Mins 19 Secs","moonriseLocal":"07:35","moonsetLocal":"21:21","rahuKala":{"name":"Rāhu Kāla","start":"10:27","end":"12:02","startHours":10.445881566611014,"endHours":12.038975551846999,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"15:14","end":"16:49","startHours":15.225163522318976,"endHours":16.81825750755496,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:16","end":"08:51","startHours":7.259693596139039,"endHours":8.852787581375026,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:38","end":"09:04","startHours":8.640375050010228,"endHours":9.065200112739824,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:12","end":"06:32","startHours":6.197630939315047,"endHours":6.537490989498725,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:37","end":"12:28","startHours":11.614150489117405,"endHours":12.463800614576597,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:58","end":"04:49","startHours":3.967299359984665,"endHours":4.816949485443859,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:36","end":"05:40","startHours":4.60453695407906,"endHours":5.666599610903051,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:10","end":"15:01","startHours":14.163100865494982,"endHours":15.012750990954176,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:13","end":"18:37","startHours":18.21135149279095,"endHours":18.61135149279095,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:25","end":"18:57","startHours":18.41135149279095,"endHours":18.942382821202944,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:10","end":"19:55","startHours":18.16135149279095,"endHours":19.91135149279095,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:37","end":"00:28","startHours":23.614150489117407,"endHours":24.4638006145766,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"05:40","end":"07:16","startHours":5.666599610903051,"endHours":7.259693596139039,"quality":"neutral"},{"name":"Labha","start":"07:16","end":"08:51","startHours":7.259693596139039,"endHours":8.852787581375026,"quality":"auspicious"},{"name":"Amṛta","start":"08:51","end":"10:27","startHours":8.852787581375026,"endHours":10.445881566611014,"quality":"auspicious"},{"name":"Kāla","start":"10:27","end":"12:02","startHours":10.445881566611014,"endHours":12.038975551846999,"quality":"inauspicious"},{"name":"Śubha","start":"12:02","end":"13:38","startHours":12.038975551846999,"endHours":13.632069537082987,"quality":"auspicious"},{"name":"Roga","start":"13:38","end":"15:14","startHours":13.632069537082987,"endHours":15.225163522318976,"quality":"inauspicious"},{"name":"Udveg","start":"15:14","end":"16:49","startHours":15.225163522318976,"endHours":16.81825750755496,"quality":"inauspicious"},{"name":"Chala","start":"16:49","end":"18:25","startHours":16.81825750755496,"endHours":18.41135149279095,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"18:25","end":"19:49","startHours":18.41135149279095,"endHours":19.81825750755496,"quality":"inauspicious"},{"name":"Udveg","start":"19:49","end":"21:14","startHours":19.81825750755496,"endHours":21.225163522318976,"quality":"inauspicious"},{"name":"Chala","start":"21:14","end":"22:38","startHours":21.225163522318976,"endHours":22.632069537082987,"quality":"neutral"},{"name":"Labha","start":"22:38","end":"00:02","startHours":22.632069537082987,"endHours":24.038975551847003,"quality":"auspicious"},{"name":"Amṛta","start":"00:02","end":"01:27","startHours":24.038975551847003,"endHours":25.445881566611014,"quality":"auspicious"},{"name":"Kāla","start":"01:27","end":"02:51","startHours":25.445881566611014,"endHours":26.852787581375026,"quality":"inauspicious"},{"name":"Śubha","start":"02:51","end":"04:16","startHours":26.852787581375026,"endHours":28.259693596139037,"quality":"auspicious"},{"name":"Roga","start":"04:16","end":"05:40","startHours":28.259693596139037,"endHours":29.666599610903052,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:40","end":"06:40","startHours":5.666599610903051,"endHours":6.666599610903051,"planetary_lord":"Venus"},{"name":"Hora 2","start":"06:40","end":"07:40","startHours":6.666599610903051,"endHours":7.666599610903051,"planetary_lord":"Sun"},{"name":"Hora 3","start":"07:40","end":"08:40","startHours":7.666599610903051,"endHours":8.666599610903052,"planetary_lord":"Mars"},{"name":"Hora 4","start":"08:40","end":"09:40","startHours":8.666599610903052,"endHours":9.666599610903052,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"09:40","end":"10:40","startHours":9.666599610903052,"endHours":10.666599610903052,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"10:40","end":"11:40","startHours":10.666599610903052,"endHours":11.666599610903052,"planetary_lord":"Moon"},{"name":"Hora 7","start":"11:40","end":"12:40","startHours":11.666599610903052,"endHours":12.666599610903052,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"12:40","end":"13:40","startHours":12.666599610903052,"endHours":13.666599610903052,"planetary_lord":"Venus"},{"name":"Hora 9","start":"13:40","end":"14:40","startHours":13.666599610903052,"endHours":14.666599610903052,"planetary_lord":"Sun"},{"name":"Hora 10","start":"14:40","end":"15:40","startHours":14.666599610903052,"endHours":15.666599610903052,"planetary_lord":"Mars"},{"name":"Hora 11","start":"15:40","end":"16:40","startHours":15.666599610903052,"endHours":16.666599610903052,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"16:40","end":"17:40","startHours":16.666599610903052,"endHours":17.666599610903052,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"17:40","end":"18:40","startHours":17.666599610903052,"endHours":18.666599610903052,"planetary_lord":"Moon"},{"name":"Hora 14","start":"18:40","end":"19:40","startHours":18.666599610903052,"endHours":19.666599610903052,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"19:40","end":"20:40","startHours":19.666599610903052,"endHours":20.666599610903052,"planetary_lord":"Venus"},{"name":"Hora 16","start":"20:40","end":"21:40","startHours":20.666599610903052,"endHours":21.666599610903052,"planetary_lord":"Sun"},{"name":"Hora 17","start":"21:40","end":"22:40","startHours":21.666599610903052,"endHours":22.666599610903052,"planetary_lord":"Mars"},{"name":"Hora 18","start":"22:40","end":"23:40","startHours":22.666599610903052,"endHours":23.666599610903052,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"23:40","end":"00:40","startHours":23.666599610903052,"endHours":24.666599610903052,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"00:40","end":"01:40","startHours":24.666599610903052,"endHours":25.666599610903052,"planetary_lord":"Moon"},{"name":"Hora 21","start":"01:40","end":"02:40","startHours":25.666599610903052,"endHours":26.666599610903052,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"02:40","end":"03:40","startHours":26.666599610903052,"endHours":27.666599610903052,"planetary_lord":"Venus"},{"name":"Hora 23","start":"03:40","end":"04:40","startHours":27.666599610903052,"endHours":28.666599610903052,"planetary_lord":"Sun"},{"name":"Hora 24","start":"04:40","end":"05:40","startHours":28.666599610903052,"endHours":29.666599610903052,"planetary_lord":"Mars"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Hasta","Citrā","Svātī","Viśākhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"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":"West (Paścim)","chandraVasa":"North-East","rahuVasa":"South-East","anandadiYoga":{"name":"Śrīvatsa","quality":"Auspicious"},"drikRitu":"Śarad (Autumn) (Drik)","vedicRitu":"Varṣā (Monsoon)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-7.314940543898755,"eotMinutes":14.219466889179907,"ayanamsa":24.1153}},"calendars":{"vikram_samvat":2075,"vikram_samvatsara":"Virodhakṛt","saka_samvat":1940,"saka_samvatsara":"Vilambī","bengali_samvat":1425,"malayalam_era":1194,"nanakshahi_year":549,"lunar_month":"Āśvina","lunar_month_paksha_full":"Āśvina Śukla Pakṣa","solar_month":"Kanyā (Puraṭṭāsi)","ritu":"Śarad (Autumn)","display_summary":"Āśvina Śukla Caturthī · Vikram 2075 Virodhakṛt · Śaka 1940 Vilambī"},"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},{"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":"shukra-walk","name":"Śukra Walk","name_sanskrit":"शुक्र यात्रा","type":"graha","description":"Beauty + creativity in dharma + BG 10.36.","step_count":5,"url":"/walk/shukra-walk"},"reason":"Śukravāra (Friday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-0562-04-11","event":"Bhagavān Buddha's birth at Lumbinī","chart_id":"buddha","shared_marker":"same Viśākhā","url":"/day/-0562-04-11","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 October 12, 2018 CE · Perth, Australia · Vidhyamitra","description":"October 12, 2018 CE for Perth, Australia: Śukla Caturthī, sūryodaya 05:40, sūryāsta 18:25.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2018-10-12","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2018-10-12","sa":"https://sa.vidhyamitra.com/city/perth/2018-10-12","hi":"https://hi.vidhyamitra.com/city/perth/2018-10-12","x-default":"https://vidhyamitra.com/city/perth/2018-10-12"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-15T08:20:34.734Z","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":"2026-05-15T08:20:34.734Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-15T08:20:34.734Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}