{"id":"vidhyamitra:city-day:perth:2017-10-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2017-10-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2017-10-18","date_display":"October 18, 2017 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":2017,"month":10,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2458044.770833,"kali_year":5119,"ahargana":1869579.2708,"sun":{"sidereal_longitude":179.9829,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":160.1791,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":29,"name":"Caturdaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturdaśī","elongation_degrees":340.1962,"elapsed_within_tithi_degrees":4.1962},"nakshatra":{"number":13,"name":"Hasta","pada":1,"moon_longitude":160.1791,"elapsed_within_degrees":0.1791},"yoga":{"number":26,"name":"Indra","sum_longitude":340.162},"karana":{"half_tithi_index":56,"name":"Viṣṭi"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"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":2017,"month":10,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2458044.770833,"ahargana":1869579.2708,"kali_year":5119,"ayanamsa_lahiri":24.1016,"grahas":{"sun":{"sidereal_longitude":180.75427100000002,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":159.99287099999992,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false,"latitude":2.8597},"mars":{"sidereal_longitude":152.627971,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":186.710371,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":187.23497099999997,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":1},"retrograde":false},"venus":{"sidereal_longitude":160.18307099999993,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":239.14817100000005,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":120.6932,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":300.6932,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"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":2017,"month":10,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2458044.770833,"kali_year":5119,"ahargana":1869579.2708,"sun":{"sidereal_longitude":179.9829,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":160.1791,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":29,"name":"Caturdaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturdaśī","elongation_degrees":340.1962,"elapsed_within_tithi_degrees":4.1962},"nakshatra":{"number":13,"name":"Hasta","pada":1,"moon_longitude":160.1791,"elapsed_within_degrees":0.1791},"yoga":{"number":26,"name":"Indra","sum_longitude":340.162},"karana":{"half_tithi_index":56,"name":"Viṣṭi"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.86,"elongation":19.804},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.86,"opposition_distance":160.196}},"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":"05:33","sunsetLocal":"18:29","solarNoonLocal":"12:01","dayLengthHours":12.943057947730686,"dayLengthDisplay":"12 Hours 56 Mins 35 Secs","nightLengthDisplay":"11 Hours 03 Mins 25 Secs","moonriseLocal":"04:31","moonsetLocal":"16:45","rahuKala":{"name":"Rāhu Kāla","start":"12:01","end":"13:38","startHours":12.019372363279693,"endHours":13.63725460674603,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"07:10","end":"08:47","startHours":7.165725632880685,"endHours":8.78360787634702,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:24","end":"12:01","startHours":10.401490119813356,"endHours":12.019372363279693,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:34","end":"09:00","startHours":8.567890243884843,"endHours":8.999325508809198,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:05","end":"06:26","startHours":6.087137470569794,"endHours":6.432285682509279,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:35","end":"12:27","startHours":11.587937098355336,"endHours":12.45080762820405,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:49","end":"04:41","startHours":3.822102329716924,"endHours":4.684972859565637,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:28","end":"05:33","startHours":4.469255227103458,"endHours":5.547843389414349,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:11","end":"15:02","startHours":14.176548687901473,"endHours":15.039419217750185,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:17","end":"18:41","startHours":18.290901337145037,"endHours":18.690901337145036,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:29","end":"19:02","startHours":18.490901337145036,"endHours":19.030195418300483,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:14","end":"19:59","startHours":18.240901337145036,"endHours":19.990901337145036,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:35","end":"00:27","startHours":23.587937098355336,"endHours":24.45080762820405,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"05:33","end":"07:10","startHours":5.547843389414349,"endHours":7.165725632880685,"quality":"auspicious"},{"name":"Amṛta","start":"07:10","end":"08:47","startHours":7.165725632880685,"endHours":8.78360787634702,"quality":"auspicious"},{"name":"Kāla","start":"08:47","end":"10:24","startHours":8.78360787634702,"endHours":10.401490119813356,"quality":"inauspicious"},{"name":"Śubha","start":"10:24","end":"12:01","startHours":10.401490119813356,"endHours":12.019372363279693,"quality":"auspicious"},{"name":"Roga","start":"12:01","end":"13:38","startHours":12.019372363279693,"endHours":13.63725460674603,"quality":"inauspicious"},{"name":"Udveg","start":"13:38","end":"15:15","startHours":13.63725460674603,"endHours":15.255136850212363,"quality":"inauspicious"},{"name":"Chala","start":"15:15","end":"16:52","startHours":15.255136850212363,"endHours":16.8730190936787,"quality":"neutral"},{"name":"Labha","start":"16:52","end":"18:29","startHours":16.8730190936787,"endHours":18.490901337145036,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"18:29","end":"19:52","startHours":18.490901337145036,"endHours":19.8730190936787,"quality":"inauspicious"},{"name":"Chala","start":"19:52","end":"21:15","startHours":19.8730190936787,"endHours":21.255136850212367,"quality":"neutral"},{"name":"Labha","start":"21:15","end":"22:38","startHours":21.255136850212367,"endHours":22.63725460674603,"quality":"auspicious"},{"name":"Amṛta","start":"22:38","end":"00:01","startHours":22.63725460674603,"endHours":24.019372363279693,"quality":"auspicious"},{"name":"Kāla","start":"00:01","end":"01:24","startHours":24.019372363279693,"endHours":25.401490119813356,"quality":"inauspicious"},{"name":"Śubha","start":"01:24","end":"02:47","startHours":25.401490119813356,"endHours":26.78360787634702,"quality":"auspicious"},{"name":"Roga","start":"02:47","end":"04:10","startHours":26.78360787634702,"endHours":28.165725632880687,"quality":"inauspicious"},{"name":"Udveg","start":"04:10","end":"05:33","startHours":28.165725632880687,"endHours":29.54784338941435,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:33","end":"06:33","startHours":5.547843389414349,"endHours":6.547843389414349,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"06:33","end":"07:33","startHours":6.547843389414349,"endHours":7.547843389414349,"planetary_lord":"Venus"},{"name":"Hora 3","start":"07:33","end":"08:33","startHours":7.547843389414349,"endHours":8.54784338941435,"planetary_lord":"Sun"},{"name":"Hora 4","start":"08:33","end":"09:33","startHours":8.54784338941435,"endHours":9.54784338941435,"planetary_lord":"Mars"},{"name":"Hora 5","start":"09:33","end":"10:33","startHours":9.54784338941435,"endHours":10.54784338941435,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"10:33","end":"11:33","startHours":10.54784338941435,"endHours":11.54784338941435,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"11:33","end":"12:33","startHours":11.54784338941435,"endHours":12.54784338941435,"planetary_lord":"Moon"},{"name":"Hora 8","start":"12:33","end":"13:33","startHours":12.54784338941435,"endHours":13.54784338941435,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"13:33","end":"14:33","startHours":13.54784338941435,"endHours":14.54784338941435,"planetary_lord":"Venus"},{"name":"Hora 10","start":"14:33","end":"15:33","startHours":14.54784338941435,"endHours":15.54784338941435,"planetary_lord":"Sun"},{"name":"Hora 11","start":"15:33","end":"16:33","startHours":15.54784338941435,"endHours":16.54784338941435,"planetary_lord":"Mars"},{"name":"Hora 12","start":"16:33","end":"17:33","startHours":16.54784338941435,"endHours":17.54784338941435,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"17:33","end":"18:33","startHours":17.54784338941435,"endHours":18.54784338941435,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"18:33","end":"19:33","startHours":18.54784338941435,"endHours":19.54784338941435,"planetary_lord":"Moon"},{"name":"Hora 15","start":"19:33","end":"20:33","startHours":19.54784338941435,"endHours":20.54784338941435,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"20:33","end":"21:33","startHours":20.54784338941435,"endHours":21.54784338941435,"planetary_lord":"Venus"},{"name":"Hora 17","start":"21:33","end":"22:33","startHours":21.54784338941435,"endHours":22.54784338941435,"planetary_lord":"Sun"},{"name":"Hora 18","start":"22:33","end":"23:33","startHours":22.54784338941435,"endHours":23.54784338941435,"planetary_lord":"Mars"},{"name":"Hora 19","start":"23:33","end":"00:33","startHours":23.54784338941435,"endHours":24.54784338941435,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"00:33","end":"01:33","startHours":24.54784338941435,"endHours":25.54784338941435,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"01:33","end":"02:33","startHours":25.54784338941435,"endHours":26.54784338941435,"planetary_lord":"Moon"},{"name":"Hora 22","start":"02:33","end":"03:33","startHours":26.54784338941435,"endHours":27.54784338941435,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"03:33","end":"04:33","startHours":27.54784338941435,"endHours":28.54784338941435,"planetary_lord":"Venus"},{"name":"Hora 24","start":"04:33","end":"05:33","startHours":28.54784338941435,"endHours":29.54784338941435,"planetary_lord":"Sun"}],"taraBala":{"favorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Citrā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Mithuna","Karka","Kanyā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Tulā","Dhanu","Makara"]},"dishaShool":"North (Uttara)","chandraVasa":"North-West","rahuVasa":"South-West","anandadiYoga":{"name":"Rākṣasa","quality":"Inauspicious"},"drikRitu":"Śarad (Autumn)","vedicRitu":"Śarad (Autumn)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-9.623997607700451,"eotMinutes":15.395658203218455,"ayanamsa":24.1016}},"calendars":{"vikram_samvat":2074,"vikram_samvatsara":"Sādhāraṇa","saka_samvat":1939,"saka_samvatsara":"Hemalambī","bengali_samvat":1424,"malayalam_era":1193,"nanakshahi_year":548,"lunar_month":"Kārtika","lunar_month_paksha_full":"Kārtika Kṛṣṇa Pakṣa","solar_month":"Tulā (Aippasi)","ritu":"Śarad (Autumn)","display_summary":"Kārtika Kṛṣṇa Caturdaśī · Vikram 2074 Sādhāraṇa · Śaka 1939 Hemalambī"},"festivals":[{"id":"naraka-chaturdashi","name":"Naraka Caturdaśī (Choṭī Diwālī)","name_sanskrit":"नरक चतुर्दशी","tradition":"Vaishnava","associated_deity":"Krishna (Narakāsura-vadha)","significance":"Krishna slew Narakāsura, freeing 16,000 captive princesses. Day 2 of Diwali.","vrata":true,"detection":{"tithi_number":29,"tithi_paksha":"Kṛṣṇa","lunar_month":"Kārtika"},"precedence":2,"sources":["Bhāgavata 10.59"]},{"id":"tula-sankranti","name":"Tulā Saṅkrānti","name_sanskrit":"तुला सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Libra.","vrata":false,"detection":{"sun_rashi":"Tulā"},"precedence":5},{"id":"masika-shivaratri","name":"Māsika Śivarātri","name_sanskrit":"मासिक शिवरात्रि","tradition":"Shaiva","associated_deity":"Śiva","significance":"Monthly Śiva observance.","vrata":true,"detection":{"tithi_number":29,"tithi_paksha":"Kṛṣṇa"},"precedence":6}],"todays_walk":{"walk":{"id":"budha-walk","name":"Budha Walk","name_sanskrit":"बुध यात्रा","type":"graha","description":"Discrimination + BG 2.41 (vyavasāyātmikā buddhi).","step_count":6,"url":"/walk/budha-walk"},"reason":"Budhavāra (Wednesday) — 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 October 18, 2017 CE · Perth, Australia · Vidhyamitra","description":"October 18, 2017 CE for Perth, Australia: Kṛṣṇa Caturdaśī, sūryodaya 05:33, sūryāsta 18:29.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2017-10-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2017-10-18","sa":"https://sa.vidhyamitra.com/city/perth/2017-10-18","hi":"https://hi.vidhyamitra.com/city/perth/2017-10-18","x-default":"https://vidhyamitra.com/city/perth/2017-10-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-15T12:19:31.899Z","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":"2026-05-15T12:19:31.899Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-15T12:19:31.899Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}