{"id":"vidhyamitra:city-day:perth:1973-01-17:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1973-01-17","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1973-01-17","date_display":"January 17, 1973 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":1973,"month":1,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441699.770833,"kali_year":5074,"ahargana":1853234.2708,"sun":{"sidereal_longitude":273.2813,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":69.9417,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":14,"name":"Caturdaśī","paksha":"Śukla","full_name":"Śukla Caturdaśī","elongation_degrees":156.6603,"elapsed_within_tithi_degrees":0.6603},"nakshatra":{"number":6,"name":"Ārdrā","pada":1,"moon_longitude":69.9417,"elapsed_within_degrees":3.275},"yoga":{"number":26,"name":"Indra","sum_longitude":343.223},"karana":{"half_tithi_index":26,"name":"Gara"},"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":1973,"month":1,"day":17,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2441699.770833,"ahargana":1853234.2708,"kali_year":5074,"ayanamsa_lahiri":23.4765,"grahas":{"sun":{"sidereal_longitude":273.31077000000005,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":67.96487000000002,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":1},"retrograde":false,"latitude":1.2985},"mars":{"sidereal_longitude":228.75536999999997,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":266.20577000000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":268.61597000000006,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":253.46916999999996,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":51.147069999999985,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":266.7299,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":86.7299,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","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":1973,"month":1,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441699.770833,"kali_year":5074,"ahargana":1853234.2708,"sun":{"sidereal_longitude":273.2813,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":69.9417,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":14,"name":"Caturdaśī","paksha":"Śukla","full_name":"Śukla Caturdaśī","elongation_degrees":156.6603,"elapsed_within_tithi_degrees":0.6603},"nakshatra":{"number":6,"name":"Ārdrā","pada":1,"moon_longitude":69.9417,"elapsed_within_degrees":3.275},"yoga":{"number":26,"name":"Indra","sum_longitude":343.223},"karana":{"half_tithi_index":26,"name":"Gara"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.299,"elongation":156.66},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.299,"opposition_distance":23.34}},"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":"05:27","sunsetLocal":"19:26","solarNoonLocal":"12:27","dayLengthHours":13.97134445282448,"dayLengthDisplay":"13 Hours 58 Mins 17 Secs","nightLengthDisplay":"10 Hours 01 Mins 43 Secs","moonriseLocal":"17:45","moonsetLocal":"03:46","rahuKala":{"name":"Rāhu Kāla","start":"12:27","end":"14:11","startHours":12.443068145768478,"endHours":14.189486202371539,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"07:12","end":"08:57","startHours":7.203813975959299,"endHours":8.95023203256236,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:42","end":"12:27","startHours":10.69665008916542,"endHours":12.443068145768478,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:43","end":"09:11","startHours":8.717376291681951,"endHours":9.183087773442768,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:02","end":"06:25","startHours":6.039535271557259,"endHours":6.412104456965912,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:59","end":"12:55","startHours":11.977356664007662,"endHours":12.908779627529295,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:36","end":"04:32","startHours":3.594549992312975,"endHours":4.525972955834607,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:18","end":"05:27","startHours":4.293117214954199,"endHours":5.457395919356239,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:46","end":"15:42","startHours":14.771625554572559,"endHours":15.70304851809419,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:14","end":"19:38","startHours":19.22874037218072,"endHours":19.62874037218072,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:26","end":"20:01","startHours":19.42874037218072,"endHours":20.010879724381738,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:11","end":"20:56","startHours":19.17874037218072,"endHours":20.92874037218072,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:59","end":"00:55","startHours":23.97735666400766,"endHours":24.908779627529295,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"05:27","end":"07:12","startHours":5.457395919356239,"endHours":7.203813975959299,"quality":"auspicious"},{"name":"Amṛta","start":"07:12","end":"08:57","startHours":7.203813975959299,"endHours":8.95023203256236,"quality":"auspicious"},{"name":"Kāla","start":"08:57","end":"10:42","startHours":8.95023203256236,"endHours":10.69665008916542,"quality":"inauspicious"},{"name":"Śubha","start":"10:42","end":"12:27","startHours":10.69665008916542,"endHours":12.443068145768478,"quality":"auspicious"},{"name":"Roga","start":"12:27","end":"14:11","startHours":12.443068145768478,"endHours":14.189486202371539,"quality":"inauspicious"},{"name":"Udveg","start":"14:11","end":"15:56","startHours":14.189486202371539,"endHours":15.935904258974599,"quality":"inauspicious"},{"name":"Chala","start":"15:56","end":"17:41","startHours":15.935904258974599,"endHours":17.682322315577657,"quality":"neutral"},{"name":"Labha","start":"17:41","end":"19:26","startHours":17.682322315577657,"endHours":19.42874037218072,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"19:26","end":"20:41","startHours":19.42874037218072,"endHours":20.68232231557766,"quality":"inauspicious"},{"name":"Chala","start":"20:41","end":"21:56","startHours":20.68232231557766,"endHours":21.9359042589746,"quality":"neutral"},{"name":"Labha","start":"21:56","end":"23:11","startHours":21.9359042589746,"endHours":23.18948620237154,"quality":"auspicious"},{"name":"Amṛta","start":"23:11","end":"00:27","startHours":23.18948620237154,"endHours":24.44306814576848,"quality":"auspicious"},{"name":"Kāla","start":"00:27","end":"01:42","startHours":24.44306814576848,"endHours":25.69665008916542,"quality":"inauspicious"},{"name":"Śubha","start":"01:42","end":"02:57","startHours":25.69665008916542,"endHours":26.95023203256236,"quality":"auspicious"},{"name":"Roga","start":"02:57","end":"04:12","startHours":26.95023203256236,"endHours":28.2038139759593,"quality":"inauspicious"},{"name":"Udveg","start":"04:12","end":"05:27","startHours":28.2038139759593,"endHours":29.457395919356237,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:27","end":"06:27","startHours":5.457395919356239,"endHours":6.457395919356239,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"06:27","end":"07:27","startHours":6.457395919356239,"endHours":7.457395919356239,"planetary_lord":"Venus"},{"name":"Hora 3","start":"07:27","end":"08:27","startHours":7.457395919356239,"endHours":8.45739591935624,"planetary_lord":"Sun"},{"name":"Hora 4","start":"08:27","end":"09:27","startHours":8.45739591935624,"endHours":9.45739591935624,"planetary_lord":"Mars"},{"name":"Hora 5","start":"09:27","end":"10:27","startHours":9.45739591935624,"endHours":10.45739591935624,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"10:27","end":"11:27","startHours":10.45739591935624,"endHours":11.45739591935624,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"11:27","end":"12:27","startHours":11.45739591935624,"endHours":12.45739591935624,"planetary_lord":"Moon"},{"name":"Hora 8","start":"12:27","end":"13:27","startHours":12.45739591935624,"endHours":13.45739591935624,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"13:27","end":"14:27","startHours":13.45739591935624,"endHours":14.45739591935624,"planetary_lord":"Venus"},{"name":"Hora 10","start":"14:27","end":"15:27","startHours":14.45739591935624,"endHours":15.45739591935624,"planetary_lord":"Sun"},{"name":"Hora 11","start":"15:27","end":"16:27","startHours":15.45739591935624,"endHours":16.457395919356237,"planetary_lord":"Mars"},{"name":"Hora 12","start":"16:27","end":"17:27","startHours":16.457395919356237,"endHours":17.457395919356237,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"17:27","end":"18:27","startHours":17.457395919356237,"endHours":18.457395919356237,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"18:27","end":"19:27","startHours":18.457395919356237,"endHours":19.457395919356237,"planetary_lord":"Moon"},{"name":"Hora 15","start":"19:27","end":"20:27","startHours":19.457395919356237,"endHours":20.457395919356237,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"20:27","end":"21:27","startHours":20.457395919356237,"endHours":21.457395919356237,"planetary_lord":"Venus"},{"name":"Hora 17","start":"21:27","end":"22:27","startHours":21.457395919356237,"endHours":22.457395919356237,"planetary_lord":"Sun"},{"name":"Hora 18","start":"22:27","end":"23:27","startHours":22.457395919356237,"endHours":23.457395919356237,"planetary_lord":"Mars"},{"name":"Hora 19","start":"23:27","end":"00:27","startHours":23.457395919356237,"endHours":24.457395919356237,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"00:27","end":"01:27","startHours":24.457395919356237,"endHours":25.457395919356237,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"01:27","end":"02:27","startHours":25.457395919356237,"endHours":26.457395919356237,"planetary_lord":"Moon"},{"name":"Hora 22","start":"02:27","end":"03:27","startHours":26.457395919356237,"endHours":27.457395919356237,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"03:27","end":"04:27","startHours":27.457395919356237,"endHours":28.457395919356237,"planetary_lord":"Venus"},{"name":"Hora 24","start":"04:27","end":"05:27","startHours":28.457395919356237,"endHours":29.457395919356237,"planetary_lord":"Sun"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Punarvasu","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Uttara Phalgunī","Hasta","Citrā","Svātī","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Mithuna","Siṃha","Vṛścika","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Karka","Kanyā","Tulā","Makara","Kumbha"]},"dishaShool":"North (Uttara)","chandraVasa":"South","rahuVasa":"South-West","anandadiYoga":{"name":"Kāṇa","quality":"Inauspicious"},"tropicalRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-20.796520374156618,"eotMinutes":-10.026088746108654,"ayanamsa":23.4765}},"calendars":{"vikram_samvat":2030,"vikram_samvatsara":"Akṣaya","saka_samvat":1895,"saka_samvatsara":"Pramādī","bengali_samvat":1380,"malayalam_era":1149,"nanakshahi_year":504,"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":"Makara (Tai)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Śukla Caturdaśī · Vikram 2030 Akṣaya · Śaka 1895 Pramādī"},"festivals":[],"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 January 17, 1973 CE · Perth, Australia · Vidhyamitra","description":"January 17, 1973 CE for Perth, Australia: Śukla Caturdaśī, sūryodaya 05:27, sūryāsta 19:26.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1973-01-17","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1973-01-17","sa":"https://sa.vidhyamitra.com/city/perth/1973-01-17","hi":"https://hi.vidhyamitra.com/city/perth/1973-01-17","x-default":"https://vidhyamitra.com/city/perth/1973-01-17"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T16:29:25.090Z","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":"2026-05-31T16:29:25.090Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T16:29:25.090Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}