{"id":"vidhyamitra:city-day:perth:2018-10-15:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2018-10-15","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2018-10-15","date_display":"October 15, 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":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2458406.770833,"kali_year":5120,"ahargana":1869941.2708,"sun":{"sidereal_longitude":176.7447,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":248.5483,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":6,"name":"Ṣaṣṭhī","paksha":"Śukla","full_name":"Śukla Ṣaṣṭhī","elongation_degrees":71.8036,"elapsed_within_tithi_degrees":11.8036},"nakshatra":{"number":19,"name":"Mūla","pada":3,"moon_longitude":248.5483,"elapsed_within_degrees":8.5483},"yoga":{"number":5,"name":"Śobhana","sum_longitude":65.2929},"karana":{"half_tithi_index":11,"name":"Taitila"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"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":15,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2458406.770833,"ahargana":1869941.2708,"kali_year":5120,"ayanamsa_lahiri":24.1154,"grahas":{"sun":{"sidereal_longitude":177.52513999999996,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":248.82384000000002,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false,"latitude":2.4468},"mars":{"sidereal_longitude":287.76964,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":193.19194000000005,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":210.62774000000002,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":194.91944,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":3},"retrograde":true},"saturn":{"sidereal_longitude":249.50684,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":101.5127,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":281.5127,"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":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2458406.770833,"kali_year":5120,"ahargana":1869941.2708,"sun":{"sidereal_longitude":176.7447,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":248.5483,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":6,"name":"Ṣaṣṭhī","paksha":"Śukla","full_name":"Śukla Ṣaṣṭhī","elongation_degrees":71.8036,"elapsed_within_tithi_degrees":11.8036},"nakshatra":{"number":19,"name":"Mūla","pada":3,"moon_longitude":248.5483,"elapsed_within_degrees":8.5483},"yoga":{"number":5,"name":"Śobhana","sum_longitude":65.2929},"karana":{"half_tithi_index":11,"name":"Taitila"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.447,"elongation":71.804},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.447,"opposition_distance":108.196}},"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":"05:36","sunsetLocal":"18:27","solarNoonLocal":"12:02","dayLengthHours":12.840496827426161,"dayLengthDisplay":"12 Hours 50 Mins 26 Secs","nightLengthDisplay":"11 Hours 09 Mins 34 Secs","moonriseLocal":"09:41","moonsetLocal":"23:53","rahuKala":{"name":"Rāhu Kāla","start":"07:13","end":"08:49","startHours":7.213166516860056,"endHours":8.818228620288327,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:25","end":"12:02","startHours":10.423290723716597,"endHours":12.028352827144868,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:38","end":"15:14","startHours":13.633414930573139,"endHours":15.238477034001406,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:36","end":"09:02","startHours":8.604220339831224,"endHours":9.03223690074543,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:09","end":"06:29","startHours":6.143125114574543,"endHours":6.485538363305907,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:36","end":"12:27","startHours":11.600336266230661,"endHours":12.456369388059072,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:54","end":"04:45","startHours":3.896038169774965,"endHours":4.752071291603376,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:32","end":"05:36","startHours":4.538063011146273,"endHours":5.608104413431787,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:10","end":"15:01","startHours":14.168435631715894,"endHours":15.024468753544305,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:15","end":"18:39","startHours":18.248601240857948,"endHours":18.648601240857946,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:27","end":"18:59","startHours":18.448601240857947,"endHours":18.983621942000703,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:12","end":"19:57","startHours":18.198601240857947,"endHours":19.948601240857947,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:36","end":"00:27","startHours":23.60033626623066,"endHours":24.45636938805907,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"05:36","end":"07:13","startHours":5.608104413431787,"endHours":7.213166516860056,"quality":"auspicious"},{"name":"Kāla","start":"07:13","end":"08:49","startHours":7.213166516860056,"endHours":8.818228620288327,"quality":"inauspicious"},{"name":"Śubha","start":"08:49","end":"10:25","startHours":8.818228620288327,"endHours":10.423290723716597,"quality":"auspicious"},{"name":"Roga","start":"10:25","end":"12:02","startHours":10.423290723716597,"endHours":12.028352827144868,"quality":"inauspicious"},{"name":"Udveg","start":"12:02","end":"13:38","startHours":12.028352827144868,"endHours":13.633414930573139,"quality":"inauspicious"},{"name":"Chala","start":"13:38","end":"15:14","startHours":13.633414930573139,"endHours":15.238477034001406,"quality":"neutral"},{"name":"Labha","start":"15:14","end":"16:51","startHours":15.238477034001406,"endHours":16.843539137429676,"quality":"auspicious"},{"name":"Amṛta","start":"16:51","end":"18:27","startHours":16.843539137429676,"endHours":18.448601240857947,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"18:27","end":"19:51","startHours":18.448601240857947,"endHours":19.843539137429676,"quality":"neutral"},{"name":"Labha","start":"19:51","end":"21:14","startHours":19.843539137429676,"endHours":21.238477034001406,"quality":"auspicious"},{"name":"Amṛta","start":"21:14","end":"22:38","startHours":21.238477034001406,"endHours":22.63341493057314,"quality":"auspicious"},{"name":"Kāla","start":"22:38","end":"00:02","startHours":22.63341493057314,"endHours":24.028352827144865,"quality":"inauspicious"},{"name":"Śubha","start":"00:02","end":"01:25","startHours":24.028352827144865,"endHours":25.423290723716597,"quality":"auspicious"},{"name":"Roga","start":"01:25","end":"02:49","startHours":25.423290723716597,"endHours":26.818228620288327,"quality":"inauspicious"},{"name":"Udveg","start":"02:49","end":"04:13","startHours":26.818228620288327,"endHours":28.213166516860056,"quality":"inauspicious"},{"name":"Chala","start":"04:13","end":"05:36","startHours":28.213166516860056,"endHours":29.608104413431786,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"05:36","end":"06:36","startHours":5.608104413431787,"endHours":6.608104413431787,"planetary_lord":"Moon"},{"name":"Hora 2","start":"06:36","end":"07:36","startHours":6.608104413431787,"endHours":7.608104413431787,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"07:36","end":"08:36","startHours":7.608104413431787,"endHours":8.608104413431786,"planetary_lord":"Venus"},{"name":"Hora 4","start":"08:36","end":"09:36","startHours":8.608104413431786,"endHours":9.608104413431786,"planetary_lord":"Sun"},{"name":"Hora 5","start":"09:36","end":"10:36","startHours":9.608104413431786,"endHours":10.608104413431786,"planetary_lord":"Mars"},{"name":"Hora 6","start":"10:36","end":"11:36","startHours":10.608104413431786,"endHours":11.608104413431786,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"11:36","end":"12:36","startHours":11.608104413431786,"endHours":12.608104413431786,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"12:36","end":"13:36","startHours":12.608104413431786,"endHours":13.608104413431786,"planetary_lord":"Moon"},{"name":"Hora 9","start":"13:36","end":"14:36","startHours":13.608104413431786,"endHours":14.608104413431786,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"14:36","end":"15:36","startHours":14.608104413431786,"endHours":15.608104413431786,"planetary_lord":"Venus"},{"name":"Hora 11","start":"15:36","end":"16:36","startHours":15.608104413431786,"endHours":16.608104413431786,"planetary_lord":"Sun"},{"name":"Hora 12","start":"16:36","end":"17:36","startHours":16.608104413431786,"endHours":17.608104413431786,"planetary_lord":"Mars"},{"name":"Hora 13","start":"17:36","end":"18:36","startHours":17.608104413431786,"endHours":18.608104413431786,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"18:36","end":"19:36","startHours":18.608104413431786,"endHours":19.608104413431786,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"19:36","end":"20:36","startHours":19.608104413431786,"endHours":20.608104413431786,"planetary_lord":"Moon"},{"name":"Hora 16","start":"20:36","end":"21:36","startHours":20.608104413431786,"endHours":21.608104413431786,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"21:36","end":"22:36","startHours":21.608104413431786,"endHours":22.608104413431786,"planetary_lord":"Venus"},{"name":"Hora 18","start":"22:36","end":"23:36","startHours":22.608104413431786,"endHours":23.608104413431786,"planetary_lord":"Sun"},{"name":"Hora 19","start":"23:36","end":"00:36","startHours":23.608104413431786,"endHours":24.608104413431786,"planetary_lord":"Mars"},{"name":"Hora 20","start":"00:36","end":"01:36","startHours":24.608104413431786,"endHours":25.608104413431786,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"01:36","end":"02:36","startHours":25.608104413431786,"endHours":26.608104413431786,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"02:36","end":"03:36","startHours":26.608104413431786,"endHours":27.608104413431786,"planetary_lord":"Moon"},{"name":"Hora 23","start":"03:36","end":"04:36","startHours":27.608104413431786,"endHours":28.608104413431786,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"04:36","end":"05:36","startHours":28.608104413431786,"endHours":29.608104413431786,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Svātī","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"unfavorable_nakshatras":["Aśvinī","Punarvasu","Puṣya","Aśleṣā","Maghā","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Tulā","Dhanu","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Makara","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"East","rahuVasa":"North-East","anandadiYoga":{"name":"Gada","quality":"Inauspicious"},"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":-8.434385464308422,"eotMinutes":14.85683037130801,"ayanamsa":24.1154}},"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 Ṣaṣṭhī · 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}],"todays_walk":{"walk":{"id":"chandra-walk","name":"Candra Walk","name_sanskrit":"चन्द्र यात्रा","type":"graha","description":"Manas-control + BG 6.5-7.","step_count":5,"url":"/walk/chandra-walk"},"reason":"Somavāra (Monday) — 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 15, 2018 CE · Perth, Australia · Vidhyamitra","description":"October 15, 2018 CE for Perth, Australia: Śukla Ṣaṣṭhī, sūryodaya 05:36, sūryāsta 18:27.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2018-10-15","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2018-10-15","sa":"https://sa.vidhyamitra.com/city/perth/2018-10-15","hi":"https://hi.vidhyamitra.com/city/perth/2018-10-15","x-default":"https://vidhyamitra.com/city/perth/2018-10-15"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-15T13:47:07.980Z","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":"2026-05-15T13:47:07.980Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-15T13:47:07.980Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}