{"id":"vidhyamitra:city-day:perth:2071-10-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2071-10-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2071-10-13","date_display":"October 13, 2071 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":2071,"month":10,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2477762.770833,"kali_year":5173,"ahargana":1889297.2708,"sun":{"sidereal_longitude":174.0534,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":41.4355,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":227.3821,"elapsed_within_tithi_degrees":11.3821},"nakshatra":{"number":4,"name":"Rohiṇī","pada":1,"moon_longitude":41.4355,"elapsed_within_degrees":1.4355},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":215.4889},"karana":{"half_tithi_index":37,"name":"Bālava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"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":2071,"month":10,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2477762.770833,"ahargana":1889297.2708,"kali_year":5173,"ayanamsa_lahiri":24.8557,"grahas":{"sun":{"sidereal_longitude":174.96589900000004,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":42.30239899999998,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":1},"retrograde":false,"latitude":-4.094},"mars":{"sidereal_longitude":81.49379899999997,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":192.669399,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":39.75009899999998,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":4},"retrograde":true},"venus":{"sidereal_longitude":127.73599899999999,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":187.14199899999994,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":155.9387,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":335.9387,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","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":2071,"month":10,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2477762.770833,"kali_year":5173,"ahargana":1889297.2708,"sun":{"sidereal_longitude":174.0534,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":41.4355,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":227.3821,"elapsed_within_tithi_degrees":11.3821},"nakshatra":{"number":4,"name":"Rohiṇī","pada":1,"moon_longitude":41.4355,"elapsed_within_degrees":1.4355},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":215.4889},"karana":{"half_tithi_index":37,"name":"Bālava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.094,"elongation":132.618},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.094,"opposition_distance":47.382}},"eclipse_window_40days":[{"offset_days":-4,"type":"lunar","occurs":true,"moon_latitude":-0.877,"opposition_distance":2.692}]},"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":"18:26","solarNoonLocal":"12:02","dayLengthHours":12.781965115688685,"dayLengthDisplay":"12 Hours 46 Mins 55 Secs","nightLengthDisplay":"11 Hours 13 Mins 05 Secs","moonriseLocal":"22:05","moonsetLocal":"08:18","rahuKala":{"name":"Rāhu Kāla","start":"15:14","end":"16:50","startHours":15.230750792120912,"endHours":16.828496431582,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"08:50","end":"10:26","startHours":8.839768234276569,"endHours":10.437513873737656,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:02","end":"13:38","startHours":12.035259513198742,"endHours":13.633005152659827,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:38","end":"09:03","startHours":8.626735482348426,"endHours":9.052800986204716,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:11","end":"06:31","startHours":6.176858835174761,"endHours":6.517711238259793,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:37","end":"12:28","startHours":11.609194009342453,"endHours":12.461325017055032,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:56","end":"04:48","startHours":3.940014939929241,"endHours":4.79214594764182,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:35","end":"05:39","startHours":4.579113195713675,"endHours":5.644276955354399,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:10","end":"15:01","startHours":14.16558703248019,"endHours":15.017718040192769,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:14","end":"18:38","startHours":18.226242071043085,"endHours":18.626242071043084,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:26","end":"18:58","startHours":18.426242071043085,"endHours":18.958823950863447,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:11","end":"19:56","startHours":18.176242071043085,"endHours":19.926242071043085,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:37","end":"00:28","startHours":23.609194009342453,"endHours":24.46132501705503,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"05:39","end":"07:15","startHours":5.644276955354399,"endHours":7.242022594815484,"quality":"inauspicious"},{"name":"Udveg","start":"07:15","end":"08:50","startHours":7.242022594815484,"endHours":8.839768234276569,"quality":"inauspicious"},{"name":"Chala","start":"08:50","end":"10:26","startHours":8.839768234276569,"endHours":10.437513873737656,"quality":"neutral"},{"name":"Labha","start":"10:26","end":"12:02","startHours":10.437513873737656,"endHours":12.035259513198742,"quality":"auspicious"},{"name":"Amṛta","start":"12:02","end":"13:38","startHours":12.035259513198742,"endHours":13.633005152659827,"quality":"auspicious"},{"name":"Kāla","start":"13:38","end":"15:14","startHours":13.633005152659827,"endHours":15.230750792120912,"quality":"inauspicious"},{"name":"Śubha","start":"15:14","end":"16:50","startHours":15.230750792120912,"endHours":16.828496431582,"quality":"auspicious"},{"name":"Roga","start":"16:50","end":"18:26","startHours":16.828496431582,"endHours":18.426242071043085,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"18:26","end":"19:50","startHours":18.426242071043085,"endHours":19.828496431582,"quality":"inauspicious"},{"name":"Śubha","start":"19:50","end":"21:14","startHours":19.828496431582,"endHours":21.230750792120915,"quality":"auspicious"},{"name":"Roga","start":"21:14","end":"22:38","startHours":21.230750792120915,"endHours":22.633005152659827,"quality":"inauspicious"},{"name":"Udveg","start":"22:38","end":"00:02","startHours":22.633005152659827,"endHours":24.035259513198742,"quality":"inauspicious"},{"name":"Chala","start":"00:02","end":"01:26","startHours":24.035259513198742,"endHours":25.437513873737657,"quality":"neutral"},{"name":"Labha","start":"01:26","end":"02:50","startHours":25.437513873737657,"endHours":26.83976823427657,"quality":"auspicious"},{"name":"Amṛta","start":"02:50","end":"04:15","startHours":26.83976823427657,"endHours":28.242022594815484,"quality":"auspicious"},{"name":"Kāla","start":"04:15","end":"05:39","startHours":28.242022594815484,"endHours":29.6442769553544,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:39","end":"06:39","startHours":5.644276955354399,"endHours":6.644276955354399,"planetary_lord":"Mars"},{"name":"Hora 2","start":"06:39","end":"07:39","startHours":6.644276955354399,"endHours":7.644276955354399,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"07:39","end":"08:39","startHours":7.644276955354399,"endHours":8.6442769553544,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"08:39","end":"09:39","startHours":8.6442769553544,"endHours":9.6442769553544,"planetary_lord":"Moon"},{"name":"Hora 5","start":"09:39","end":"10:39","startHours":9.6442769553544,"endHours":10.6442769553544,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"10:39","end":"11:39","startHours":10.6442769553544,"endHours":11.6442769553544,"planetary_lord":"Venus"},{"name":"Hora 7","start":"11:39","end":"12:39","startHours":11.6442769553544,"endHours":12.6442769553544,"planetary_lord":"Sun"},{"name":"Hora 8","start":"12:39","end":"13:39","startHours":12.6442769553544,"endHours":13.6442769553544,"planetary_lord":"Mars"},{"name":"Hora 9","start":"13:39","end":"14:39","startHours":13.6442769553544,"endHours":14.6442769553544,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"14:39","end":"15:39","startHours":14.6442769553544,"endHours":15.6442769553544,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"15:39","end":"16:39","startHours":15.6442769553544,"endHours":16.6442769553544,"planetary_lord":"Moon"},{"name":"Hora 12","start":"16:39","end":"17:39","startHours":16.6442769553544,"endHours":17.6442769553544,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"17:39","end":"18:39","startHours":17.6442769553544,"endHours":18.6442769553544,"planetary_lord":"Venus"},{"name":"Hora 14","start":"18:39","end":"19:39","startHours":18.6442769553544,"endHours":19.6442769553544,"planetary_lord":"Sun"},{"name":"Hora 15","start":"19:39","end":"20:39","startHours":19.6442769553544,"endHours":20.6442769553544,"planetary_lord":"Mars"},{"name":"Hora 16","start":"20:39","end":"21:39","startHours":20.6442769553544,"endHours":21.6442769553544,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"21:39","end":"22:39","startHours":21.6442769553544,"endHours":22.6442769553544,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"22:39","end":"23:39","startHours":22.6442769553544,"endHours":23.6442769553544,"planetary_lord":"Moon"},{"name":"Hora 19","start":"23:39","end":"00:39","startHours":23.6442769553544,"endHours":24.6442769553544,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"00:39","end":"01:39","startHours":24.6442769553544,"endHours":25.6442769553544,"planetary_lord":"Venus"},{"name":"Hora 21","start":"01:39","end":"02:39","startHours":25.6442769553544,"endHours":26.6442769553544,"planetary_lord":"Sun"},{"name":"Hora 22","start":"02:39","end":"03:39","startHours":26.6442769553544,"endHours":27.6442769553544,"planetary_lord":"Mars"},{"name":"Hora 23","start":"03:39","end":"04:39","startHours":27.6442769553544,"endHours":28.6442769553544,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"04:39","end":"05:39","startHours":28.6442769553544,"endHours":29.6442769553544,"planetary_lord":"Saturn"}],"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":["Vṛṣabha","Karka","Tulā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Siṃha","Kanyā","Dhanu","Makara"]},"dishaShool":"North (Uttara)","chandraVasa":"South-East","rahuVasa":"North","anandadiYoga":{"name":"Maitra","quality":"Auspicious"},"tropicalRitu":"Śarad (Autumn) (tropical)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-7.7509944286129215,"eotMinutes":14.442429208075392,"ayanamsa":24.8557}},"calendars":{"vikram_samvat":2128,"vikram_samvatsara":"Krodhi","saka_samvat":1993,"saka_samvatsara":"Khara","bengali_samvat":1478,"malayalam_era":1247,"nanakshahi_year":602,"lunar_month":"Kārtika","lunar_month_paksha_full":"Kārtika Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Kārtika","lunar_month_amanta":"Āśvina","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Kanyā (Puraṭṭāsi)","ritu":"Śarad (Autumn)","display_summary":"Kārtika Kṛṣṇa Caturthī · Vikram 2128 Krodhi · Śaka 1993 Khara"},"festivals":[{"id":"karva-chauth","name":"Karvā Chauth","name_sanskrit":"करवा चौथ","tradition":"Pan-Hindu","associated_deity":"Pārvatī + Gaṇeśa + Chandra","significance":"North Indian wives' fast for husband's longevity. Kṛṣṇa Caturthī of Kārtika.","vrata":true,"detection":{"tithi_number":19,"tithi_paksha":"Kṛṣṇa","lunar_month":"Kārtika"},"precedence":2},{"id":"angarika-chaturthi","name":"Aṅgāraka Caturthī (Tuesday Caturthī)","name_sanskrit":"अङ्गारक चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa + Maṅgala","significance":"Tuesday-Caturthī (rare); supremely auspicious for Maṅgala-doṣa-nivāraṇa.","vrata":true,"detection":{"any_of":[{"tithi_number":4,"vara_name":"Maṅgalavāra (Tuesday)"},{"tithi_number":19,"vara_name":"Maṅgalavāra (Tuesday)"}]},"precedence":3},{"id":"sankashti-chaturthi","name":"Saṅkaṣṭī Caturthī","name_sanskrit":"सङ्कष्टी चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Gaṇeśa vrata.","vrata":true,"detection":{"tithi_number":19,"tithi_paksha":"Kṛṣṇa"},"precedence":6}],"todays_walk":{"walk":{"id":"mangala-walk","name":"Maṅgala Walk","name_sanskrit":"मङ्गल यात्रा","type":"graha","description":"Right action + BG 2.31-38 (kṣatriya-dharma).","step_count":7,"url":"/walk/mangala-walk"},"reason":"Maṅgalavāra (Tuesday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3226-07-09","event":"Bhagavān Krishna's birth at Mathurā","chart_id":"krishna","shared_marker":"same Rohiṇī","url":"/day/-3226-07-09","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 13, 2071 CE · Perth, Australia · Vidhyamitra","description":"October 13, 2071 CE for Perth, Australia: Kṛṣṇa Caturthī, sūryodaya 05:39, sūryāsta 18:26.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2071-10-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2071-10-13","sa":"https://sa.vidhyamitra.com/city/perth/2071-10-13","hi":"https://hi.vidhyamitra.com/city/perth/2071-10-13","x-default":"https://vidhyamitra.com/city/perth/2071-10-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T21:31:22.308Z","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":"2026-06-02T21:31:22.308Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T21:31:22.308Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}