{"id":"vidhyamitra:city-day:perth:2023-10-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2023-10-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2023-10-13","date_display":"October 13, 2023 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":2023,"month":10,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2460230.770833,"kali_year":5125,"ahargana":1871765.2708,"sun":{"sidereal_longitude":174.4698,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":154.5337,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":29,"name":"Caturdaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturdaśī","elongation_degrees":340.0639,"elapsed_within_tithi_degrees":4.0639},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3,"moon_longitude":154.5337,"elapsed_within_degrees":7.867},"yoga":{"number":25,"name":"Brahma","sum_longitude":329.0035},"karana":{"half_tithi_index":56,"name":"Viṣṭi"},"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":2023,"month":10,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2460230.770833,"ahargana":1871765.2708,"kali_year":5125,"ayanamsa_lahiri":24.1852,"grahas":{"sun":{"sidereal_longitude":175.26565000000005,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":156.24235,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3},"retrograde":false,"latitude":2.271},"mars":{"sidereal_longitude":186.11424999999997,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":169.64035,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":19.055349999999976,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2},"retrograde":true},"venus":{"sidereal_longitude":128.96275000000003,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":306.8298500000001,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":4.8684,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":184.8684,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":4},"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":2023,"month":10,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2460230.770833,"kali_year":5125,"ahargana":1871765.2708,"sun":{"sidereal_longitude":174.4698,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":154.5337,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":29,"name":"Caturdaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturdaśī","elongation_degrees":340.0639,"elapsed_within_tithi_degrees":4.0639},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3,"moon_longitude":154.5337,"elapsed_within_degrees":7.867},"yoga":{"number":25,"name":"Brahma","sum_longitude":329.0035},"karana":{"half_tithi_index":56,"name":"Viṣṭi"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.271,"elongation":19.936},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.271,"opposition_distance":160.064}},"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":"05:39","sunsetLocal":"18:25","solarNoonLocal":"12:02","dayLengthHours":12.769994362556723,"dayLengthDisplay":"12 Hours 46 Mins 12 Secs","nightLengthDisplay":"11 Hours 13 Mins 48 Secs","moonriseLocal":"04:43","moonsetLocal":"16:49","rahuKala":{"name":"Rāhu Kāla","start":"10:26","end":"12:02","startHours":10.43901021787915,"endHours":12.035259513198742,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"15:14","end":"16:49","startHours":15.227758103837923,"endHours":16.824007399157512,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:15","end":"08:51","startHours":7.246511627239971,"endHours":8.842760922559561,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:38","end":"09:03","startHours":8.629927683183617,"endHours":9.055594161935506,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:11","end":"06:31","startHours":6.182345430360244,"endHours":6.5228786133617565,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:37","end":"12:28","startHours":11.609593034446851,"endHours":12.460925991950633,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:57","end":"04:48","startHours":3.9475964169128175,"endHours":4.798929374416599,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:35","end":"05:39","startHours":4.586096135040654,"endHours":5.650262331920381,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:10","end":"15:01","startHours":14.163591906958196,"endHours":15.014924864461978,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:13","end":"18:37","startHours":18.220256694477104,"endHours":18.620256694477103,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:25","end":"18:57","startHours":18.420256694477104,"endHours":18.952339792916966,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:10","end":"19:55","startHours":18.170256694477104,"endHours":19.920256694477104,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:37","end":"00:28","startHours":23.609593034446853,"endHours":24.46092599195063,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"05:39","end":"07:15","startHours":5.650262331920381,"endHours":7.246511627239971,"quality":"neutral"},{"name":"Labha","start":"07:15","end":"08:51","startHours":7.246511627239971,"endHours":8.842760922559561,"quality":"auspicious"},{"name":"Amṛta","start":"08:51","end":"10:26","startHours":8.842760922559561,"endHours":10.43901021787915,"quality":"auspicious"},{"name":"Kāla","start":"10:26","end":"12:02","startHours":10.43901021787915,"endHours":12.035259513198742,"quality":"inauspicious"},{"name":"Śubha","start":"12:02","end":"13:38","startHours":12.035259513198742,"endHours":13.631508808518333,"quality":"auspicious"},{"name":"Roga","start":"13:38","end":"15:14","startHours":13.631508808518333,"endHours":15.227758103837923,"quality":"inauspicious"},{"name":"Udveg","start":"15:14","end":"16:49","startHours":15.227758103837923,"endHours":16.824007399157512,"quality":"inauspicious"},{"name":"Chala","start":"16:49","end":"18:25","startHours":16.824007399157512,"endHours":18.420256694477104,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"18:25","end":"19:49","startHours":18.420256694477104,"endHours":19.824007399157512,"quality":"inauspicious"},{"name":"Udveg","start":"19:49","end":"21:14","startHours":19.824007399157512,"endHours":21.22775810383792,"quality":"inauspicious"},{"name":"Chala","start":"21:14","end":"22:38","startHours":21.22775810383792,"endHours":22.631508808518333,"quality":"neutral"},{"name":"Labha","start":"22:38","end":"00:02","startHours":22.631508808518333,"endHours":24.035259513198742,"quality":"auspicious"},{"name":"Amṛta","start":"00:02","end":"01:26","startHours":24.035259513198742,"endHours":25.43901021787915,"quality":"auspicious"},{"name":"Kāla","start":"01:26","end":"02:51","startHours":25.43901021787915,"endHours":26.842760922559563,"quality":"inauspicious"},{"name":"Śubha","start":"02:51","end":"04:15","startHours":26.842760922559563,"endHours":28.246511627239972,"quality":"auspicious"},{"name":"Roga","start":"04:15","end":"05:39","startHours":28.246511627239972,"endHours":29.65026233192038,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:39","end":"06:39","startHours":5.650262331920381,"endHours":6.650262331920381,"planetary_lord":"Venus"},{"name":"Hora 2","start":"06:39","end":"07:39","startHours":6.650262331920381,"endHours":7.650262331920381,"planetary_lord":"Sun"},{"name":"Hora 3","start":"07:39","end":"08:39","startHours":7.650262331920381,"endHours":8.65026233192038,"planetary_lord":"Mars"},{"name":"Hora 4","start":"08:39","end":"09:39","startHours":8.65026233192038,"endHours":9.65026233192038,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"09:39","end":"10:39","startHours":9.65026233192038,"endHours":10.65026233192038,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"10:39","end":"11:39","startHours":10.65026233192038,"endHours":11.65026233192038,"planetary_lord":"Moon"},{"name":"Hora 7","start":"11:39","end":"12:39","startHours":11.65026233192038,"endHours":12.65026233192038,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"12:39","end":"13:39","startHours":12.65026233192038,"endHours":13.65026233192038,"planetary_lord":"Venus"},{"name":"Hora 9","start":"13:39","end":"14:39","startHours":13.65026233192038,"endHours":14.65026233192038,"planetary_lord":"Sun"},{"name":"Hora 10","start":"14:39","end":"15:39","startHours":14.65026233192038,"endHours":15.65026233192038,"planetary_lord":"Mars"},{"name":"Hora 11","start":"15:39","end":"16:39","startHours":15.65026233192038,"endHours":16.65026233192038,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"16:39","end":"17:39","startHours":16.65026233192038,"endHours":17.65026233192038,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"17:39","end":"18:39","startHours":17.65026233192038,"endHours":18.65026233192038,"planetary_lord":"Moon"},{"name":"Hora 14","start":"18:39","end":"19:39","startHours":18.65026233192038,"endHours":19.65026233192038,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"19:39","end":"20:39","startHours":19.65026233192038,"endHours":20.65026233192038,"planetary_lord":"Venus"},{"name":"Hora 16","start":"20:39","end":"21:39","startHours":20.65026233192038,"endHours":21.65026233192038,"planetary_lord":"Sun"},{"name":"Hora 17","start":"21:39","end":"22:39","startHours":21.65026233192038,"endHours":22.65026233192038,"planetary_lord":"Mars"},{"name":"Hora 18","start":"22:39","end":"23:39","startHours":22.65026233192038,"endHours":23.65026233192038,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"23:39","end":"00:39","startHours":23.65026233192038,"endHours":24.65026233192038,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"00:39","end":"01:39","startHours":24.65026233192038,"endHours":25.65026233192038,"planetary_lord":"Moon"},{"name":"Hora 21","start":"01:39","end":"02:39","startHours":25.65026233192038,"endHours":26.65026233192038,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"02:39","end":"03:39","startHours":26.65026233192038,"endHours":27.65026233192038,"planetary_lord":"Venus"},{"name":"Hora 23","start":"03:39","end":"04:39","startHours":27.65026233192038,"endHours":28.65026233192038,"planetary_lord":"Sun"},{"name":"Hora 24","start":"04:39","end":"05:39","startHours":28.65026233192038,"endHours":29.65026233192038,"planetary_lord":"Mars"}],"taraBala":{"favorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Hasta","Citrā","Svātī","Viśākhā","Anurādhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Revatī"],"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":"West (Paścim)","chandraVasa":"North-West","rahuVasa":"South-East","anandadiYoga":{"name":"Prajāpati","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":-7.610853794312955,"eotMinutes":14.442429208075392,"ayanamsa":24.1852}},"calendars":{"vikram_samvat":2080,"vikram_samvatsara":"Nala","saka_samvat":1945,"saka_samvatsara":"Śobhana","bengali_samvat":1430,"malayalam_era":1199,"nanakshahi_year":554,"lunar_month":"Āśvina","lunar_month_paksha_full":"Āśvina Kṛṣṇa Pakṣa","solar_month":"Kanyā (Puraṭṭāsi)","ritu":"Śarad (Autumn)","display_summary":"Āśvina Kṛṣṇa Caturdaśī · Vikram 2080 Nala · Śaka 1945 Śobhana"},"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":"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":"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":[]},"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 13, 2023 CE · Perth, Australia · Vidhyamitra","description":"October 13, 2023 CE for Perth, Australia: Kṛṣṇa Caturdaśī, sūryodaya 05:39, sūryāsta 18:25.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2023-10-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2023-10-13","sa":"https://sa.vidhyamitra.com/city/perth/2023-10-13","hi":"https://hi.vidhyamitra.com/city/perth/2023-10-13","x-default":"https://vidhyamitra.com/city/perth/2023-10-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-15T02:42:14.539Z","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":"2026-05-15T02:42:14.539Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-15T02:42:14.539Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}