{"id":"vidhyamitra:city-day:perth:1957-01-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1957-01-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1957-01-13","date_display":"January 13, 1957 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":1957,"month":1,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2435851.770833,"kali_year":5058,"ahargana":1847386.2708,"sun":{"sidereal_longitude":269.3182,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":46.7086,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":137.3904,"elapsed_within_tithi_degrees":5.3904},"nakshatra":{"number":4,"name":"Rohiṇī","pada":3,"moon_longitude":46.7086,"elapsed_within_degrees":6.7086},"yoga":{"number":24,"name":"Śukla","sum_longitude":316.0268},"karana":{"half_tithi_index":22,"name":"Bava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"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":1957,"month":1,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2435851.770833,"ahargana":1847386.2708,"kali_year":5058,"ayanamsa_lahiri":23.2528,"grahas":{"sun":{"sidereal_longitude":269.3424070000001,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":45.01470699999999,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":2},"retrograde":false,"latitude":-0.7902},"mars":{"sidereal_longitude":357.99890700000003,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":264.264807,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":true},"jupiter":{"sidereal_longitude":158.53330700000004,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"venus":{"sidereal_longitude":247.58540700000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":227.66730699999994,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":216.5851,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":36.5851,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","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":1957,"month":1,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2435851.770833,"kali_year":5058,"ahargana":1847386.2708,"sun":{"sidereal_longitude":269.3182,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":46.7086,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":137.3904,"elapsed_within_tithi_degrees":5.3904},"nakshatra":{"number":4,"name":"Rohiṇī","pada":3,"moon_longitude":46.7086,"elapsed_within_degrees":6.7086},"yoga":{"number":24,"name":"Śukla","sum_longitude":316.0268},"karana":{"half_tithi_index":22,"name":"Bava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-0.79,"elongation":137.39},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-0.79,"opposition_distance":42.61}},"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":"05:24","sunsetLocal":"19:27","solarNoonLocal":"12:25","dayLengthHours":14.046029361923413,"dayLengthDisplay":"14 Hours 02 Mins 46 Secs","nightLengthDisplay":"9 Hours 57 Mins 14 Secs","moonriseLocal":"16:22","moonsetLocal":"02:34","rahuKala":{"name":"Rāhu Kāla","start":"17:41","end":"19:27","startHours":17.68715986891084,"endHours":19.442913539151267,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:25","end":"14:11","startHours":12.419898858189558,"endHours":14.175652528429985,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:56","end":"17:41","startHours":15.931406198670413,"endHours":17.68715986891084,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:40","end":"09:09","startHours":8.674291028343315,"endHours":9.142492007074097,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:59","end":"06:21","startHours":5.9821354006413285,"endHours":6.356696183625953,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:57","end":"12:53","startHours":11.951697879458779,"endHours":12.888099836920341,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:31","end":"04:28","startHours":3.5240802623047314,"endHours":4.460482219766292,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:14","end":"05:24","startHours":4.2263817304009015,"endHours":5.396884177227853,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:46","end":"15:42","startHours":14.760903751843461,"endHours":15.697305709305022,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:15","end":"19:39","startHours":19.242913539151267,"endHours":19.642913539151266,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:27","end":"20:02","startHours":19.442913539151267,"endHours":20.028164762564742,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:12","end":"20:57","startHours":19.192913539151267,"endHours":20.942913539151267,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:57","end":"00:53","startHours":23.95169787945878,"endHours":24.888099836920343,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:24","end":"07:09","startHours":5.396884177227853,"endHours":7.152637847468279,"quality":"inauspicious"},{"name":"Chala","start":"07:09","end":"08:55","startHours":7.152637847468279,"endHours":8.908391517708706,"quality":"neutral"},{"name":"Labha","start":"08:55","end":"10:40","startHours":8.908391517708706,"endHours":10.664145187949131,"quality":"auspicious"},{"name":"Amṛta","start":"10:40","end":"12:25","startHours":10.664145187949131,"endHours":12.419898858189558,"quality":"auspicious"},{"name":"Kāla","start":"12:25","end":"14:11","startHours":12.419898858189558,"endHours":14.175652528429985,"quality":"inauspicious"},{"name":"Śubha","start":"14:11","end":"15:56","startHours":14.175652528429985,"endHours":15.931406198670413,"quality":"auspicious"},{"name":"Roga","start":"15:56","end":"17:41","startHours":15.931406198670413,"endHours":17.68715986891084,"quality":"inauspicious"},{"name":"Udveg","start":"17:41","end":"19:27","startHours":17.68715986891084,"endHours":19.442913539151267,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"19:27","end":"20:41","startHours":19.442913539151267,"endHours":20.68715986891084,"quality":"auspicious"},{"name":"Roga","start":"20:41","end":"21:56","startHours":20.68715986891084,"endHours":21.931406198670413,"quality":"inauspicious"},{"name":"Udveg","start":"21:56","end":"23:11","startHours":21.931406198670413,"endHours":23.175652528429985,"quality":"inauspicious"},{"name":"Chala","start":"23:11","end":"00:25","startHours":23.175652528429985,"endHours":24.419898858189562,"quality":"neutral"},{"name":"Labha","start":"00:25","end":"01:40","startHours":24.419898858189562,"endHours":25.66414518794913,"quality":"auspicious"},{"name":"Amṛta","start":"01:40","end":"02:55","startHours":25.66414518794913,"endHours":26.908391517708708,"quality":"auspicious"},{"name":"Kāla","start":"02:55","end":"04:09","startHours":26.908391517708708,"endHours":28.15263784746828,"quality":"inauspicious"},{"name":"Śubha","start":"04:09","end":"05:24","startHours":28.15263784746828,"endHours":29.396884177227854,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:24","end":"06:24","startHours":5.396884177227853,"endHours":6.396884177227853,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:24","end":"07:24","startHours":6.396884177227853,"endHours":7.396884177227853,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:24","end":"08:24","startHours":7.396884177227853,"endHours":8.396884177227854,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:24","end":"09:24","startHours":8.396884177227854,"endHours":9.396884177227854,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:24","end":"10:24","startHours":9.396884177227854,"endHours":10.396884177227854,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:24","end":"11:24","startHours":10.396884177227854,"endHours":11.396884177227854,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:24","end":"12:24","startHours":11.396884177227854,"endHours":12.396884177227854,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:24","end":"13:24","startHours":12.396884177227854,"endHours":13.396884177227854,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:24","end":"14:24","startHours":13.396884177227854,"endHours":14.396884177227854,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:24","end":"15:24","startHours":14.396884177227854,"endHours":15.396884177227854,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:24","end":"16:24","startHours":15.396884177227854,"endHours":16.396884177227854,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:24","end":"17:24","startHours":16.396884177227854,"endHours":17.396884177227854,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:24","end":"18:24","startHours":17.396884177227854,"endHours":18.396884177227854,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:24","end":"19:24","startHours":18.396884177227854,"endHours":19.396884177227854,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:24","end":"20:24","startHours":19.396884177227854,"endHours":20.396884177227854,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:24","end":"21:24","startHours":20.396884177227854,"endHours":21.396884177227854,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:24","end":"22:24","startHours":21.396884177227854,"endHours":22.396884177227854,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:24","end":"23:24","startHours":22.396884177227854,"endHours":23.396884177227854,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:24","end":"00:24","startHours":23.396884177227854,"endHours":24.396884177227854,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:24","end":"01:24","startHours":24.396884177227854,"endHours":25.396884177227854,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:24","end":"02:24","startHours":25.396884177227854,"endHours":26.396884177227854,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:24","end":"03:24","startHours":26.396884177227854,"endHours":27.396884177227854,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:24","end":"04:24","startHours":27.396884177227854,"endHours":28.396884177227854,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:24","end":"05:24","startHours":28.396884177227854,"endHours":29.396884177227854,"planetary_lord":"Jupiter"}],"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":"West (Paścim)","chandraVasa":"South-East","rahuVasa":"North-East","anandadiYoga":{"name":"Prajāpati","quality":"Auspicious"},"tropicalRitu":"Hemanta (Pre-winter) (tropical)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-21.543250260148294,"eotMinutes":-8.635931491373626,"ayanamsa":23.2528}},"calendars":{"vikram_samvat":2014,"vikram_samvatsara":"Sādhāraṇa","saka_samvat":1879,"saka_samvatsara":"Hemalambī","bengali_samvat":1364,"malayalam_era":1133,"nanakshahi_year":488,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Pauṣa","lunar_month_amanta":"Pauṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Śukla Dvādaśī · Vikram 2014 Sādhāraṇa · Śaka 1879 Hemalambī"},"festivals":[{"id":"makara-sankranti","name":"Makara Saṅkrānti (Uttarāyaṇa)","name_sanskrit":"मकर सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Capricorn; Uttarāyaṇa (north-going) begins. Bhīṣma's chosen mahaprasthāna time.","vrata":true,"detection":{"sun_rashi_ingress":"Makara"},"precedence":1,"sources":["Mahābhārata Bhīṣma-Stuti","Sūrya-Siddhānta"]},{"id":"pongal","name":"Pongal / Thai Pongal","name_sanskrit":"पोङ्गल","tradition":"Regional","associated_deity":"Sūrya Bhagavān","significance":"Tamil 4-day harvest festival; coincides with Makara Saṅkrānti.","vrata":false,"detection":{"sun_rashi_ingress":"Makara"},"precedence":2}],"todays_walk":{"walk":{"id":"surya-walk","name":"Sūrya Walk","name_sanskrit":"सूर्य यात्रा","type":"graha","description":"Self-illumination + BG 4.1 (Sun-lineage of Gītā transmission).","step_count":6,"url":"/walk/surya-walk"},"reason":"Ravivāra (Sunday) — 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 January 13, 1957 CE · Perth, Australia · Vidhyamitra","description":"January 13, 1957 CE for Perth, Australia: Śukla Dvādaśī, sūryodaya 05:24, sūryāsta 19:27.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1957-01-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1957-01-13","sa":"https://sa.vidhyamitra.com/city/perth/1957-01-13","hi":"https://hi.vidhyamitra.com/city/perth/1957-01-13","x-default":"https://vidhyamitra.com/city/perth/1957-01-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T21:55:21.981Z","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":"2026-06-01T21:55:21.981Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T21:55:21.981Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}