{"id":"vidhyamitra:city-day:perth:1990-01-04:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1990-01-04","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1990-01-04","date_display":"January 4, 1990 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":1990,"month":1,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2447895.770833,"kali_year":5091,"ahargana":1859430.2708,"sun":{"sidereal_longitude":259.515,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":345.7703,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":86.2554,"elapsed_within_tithi_degrees":2.2554},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4,"moon_longitude":345.7703,"elapsed_within_degrees":12.437},"yoga":{"number":19,"name":"Parigha","sum_longitude":245.2853},"karana":{"half_tithi_index":14,"name":"Viṣṭi"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"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":1990,"month":1,"day":4,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2447895.770833,"ahargana":1859430.2708,"kali_year":5091,"ayanamsa_lahiri":23.7134,"grahas":{"sun":{"sidereal_longitude":259.6986380000001,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":344.408138,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4},"retrograde":false,"latitude":3.3074},"mars":{"sidereal_longitude":228.210738,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":270.75763800000004,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":true},"jupiter":{"sidereal_longitude":71.268438,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":2},"retrograde":true},"venus":{"sidereal_longitude":282.14433800000006,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":true},"saturn":{"sidereal_longitude":262.01433799999995,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":298.436,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":118.436,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","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":1990,"month":1,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2447895.770833,"kali_year":5091,"ahargana":1859430.2708,"sun":{"sidereal_longitude":259.515,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":345.7703,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":86.2554,"elapsed_within_tithi_degrees":2.2554},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4,"moon_longitude":345.7703,"elapsed_within_degrees":12.437},"yoga":{"number":19,"name":"Parigha","sum_longitude":245.2853},"karana":{"half_tithi_index":14,"name":"Viṣṭi"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.307,"elongation":86.255},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.307,"opposition_distance":93.745}},"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":"05:16","sunsetLocal":"19:27","solarNoonLocal":"12:22","dayLengthHours":14.169978698831677,"dayLengthDisplay":"14 Hours 10 Mins 12 Secs","nightLengthDisplay":"9 Hours 49 Mins 48 Secs","moonriseLocal":"12:06","moonsetLocal":"23:55","rahuKala":{"name":"Rāhu Kāla","start":"14:08","end":"15:54","startHours":14.130945785109727,"endHours":15.90219312246369,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"05:16","end":"07:03","startHours":5.2747090983399305,"endHours":7.04595643569389,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"08:49","end":"10:35","startHours":8.81720377304785,"endHours":10.58845111040181,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:35","end":"09:03","startHours":8.581037461400655,"endHours":9.053370084695045,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:52","end":"06:15","startHours":5.865124877457917,"endHours":6.242990976093428,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:53","end":"12:50","startHours":11.887365824461378,"endHours":12.832031071050158,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:23","end":"04:20","startHours":3.3853786051623738,"endHours":4.330043851751152,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:06","end":"05:16","startHours":4.093877540103957,"endHours":5.2747090983399305,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:43","end":"15:40","startHours":14.721361564227717,"endHours":15.666026810816495,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:15","end":"19:39","startHours":19.244687797171608,"endHours":19.644687797171606,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:27","end":"20:02","startHours":19.444687797171607,"endHours":20.035103576289593,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:12","end":"20:57","startHours":19.194687797171607,"endHours":20.944687797171607,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:53","end":"00:50","startHours":23.88736582446138,"endHours":24.832031071050157,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"05:16","end":"07:03","startHours":5.2747090983399305,"endHours":7.04595643569389,"quality":"auspicious"},{"name":"Roga","start":"07:03","end":"08:49","startHours":7.04595643569389,"endHours":8.81720377304785,"quality":"inauspicious"},{"name":"Udveg","start":"08:49","end":"10:35","startHours":8.81720377304785,"endHours":10.58845111040181,"quality":"inauspicious"},{"name":"Chala","start":"10:35","end":"12:22","startHours":10.58845111040181,"endHours":12.359698447755768,"quality":"neutral"},{"name":"Labha","start":"12:22","end":"14:08","startHours":12.359698447755768,"endHours":14.130945785109727,"quality":"auspicious"},{"name":"Amṛta","start":"14:08","end":"15:54","startHours":14.130945785109727,"endHours":15.90219312246369,"quality":"auspicious"},{"name":"Kāla","start":"15:54","end":"17:40","startHours":15.90219312246369,"endHours":17.673440459817648,"quality":"inauspicious"},{"name":"Śubha","start":"17:40","end":"19:27","startHours":17.673440459817648,"endHours":19.444687797171607,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"19:27","end":"20:40","startHours":19.444687797171607,"endHours":20.673440459817648,"quality":"auspicious"},{"name":"Kāla","start":"20:40","end":"21:54","startHours":20.673440459817648,"endHours":21.902193122463686,"quality":"inauspicious"},{"name":"Śubha","start":"21:54","end":"23:08","startHours":21.902193122463686,"endHours":23.130945785109727,"quality":"auspicious"},{"name":"Roga","start":"23:08","end":"00:22","startHours":23.130945785109727,"endHours":24.35969844775577,"quality":"inauspicious"},{"name":"Udveg","start":"00:22","end":"01:35","startHours":24.35969844775577,"endHours":25.58845111040181,"quality":"inauspicious"},{"name":"Chala","start":"01:35","end":"02:49","startHours":25.58845111040181,"endHours":26.81720377304785,"quality":"neutral"},{"name":"Labha","start":"02:49","end":"04:03","startHours":26.81720377304785,"endHours":28.04595643569389,"quality":"auspicious"},{"name":"Amṛta","start":"04:03","end":"05:16","startHours":28.04595643569389,"endHours":29.27470909833993,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:16","end":"06:16","startHours":5.2747090983399305,"endHours":6.2747090983399305,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"06:16","end":"07:16","startHours":6.2747090983399305,"endHours":7.2747090983399305,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"07:16","end":"08:16","startHours":7.2747090983399305,"endHours":8.27470909833993,"planetary_lord":"Moon"},{"name":"Hora 4","start":"08:16","end":"09:16","startHours":8.27470909833993,"endHours":9.27470909833993,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"09:16","end":"10:16","startHours":9.27470909833993,"endHours":10.27470909833993,"planetary_lord":"Venus"},{"name":"Hora 6","start":"10:16","end":"11:16","startHours":10.27470909833993,"endHours":11.27470909833993,"planetary_lord":"Sun"},{"name":"Hora 7","start":"11:16","end":"12:16","startHours":11.27470909833993,"endHours":12.27470909833993,"planetary_lord":"Mars"},{"name":"Hora 8","start":"12:16","end":"13:16","startHours":12.27470909833993,"endHours":13.27470909833993,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"13:16","end":"14:16","startHours":13.27470909833993,"endHours":14.27470909833993,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"14:16","end":"15:16","startHours":14.27470909833993,"endHours":15.27470909833993,"planetary_lord":"Moon"},{"name":"Hora 11","start":"15:16","end":"16:16","startHours":15.27470909833993,"endHours":16.27470909833993,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"16:16","end":"17:16","startHours":16.27470909833993,"endHours":17.27470909833993,"planetary_lord":"Venus"},{"name":"Hora 13","start":"17:16","end":"18:16","startHours":17.27470909833993,"endHours":18.27470909833993,"planetary_lord":"Sun"},{"name":"Hora 14","start":"18:16","end":"19:16","startHours":18.27470909833993,"endHours":19.27470909833993,"planetary_lord":"Mars"},{"name":"Hora 15","start":"19:16","end":"20:16","startHours":19.27470909833993,"endHours":20.27470909833993,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"20:16","end":"21:16","startHours":20.27470909833993,"endHours":21.27470909833993,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"21:16","end":"22:16","startHours":21.27470909833993,"endHours":22.27470909833993,"planetary_lord":"Moon"},{"name":"Hora 18","start":"22:16","end":"23:16","startHours":22.27470909833993,"endHours":23.27470909833993,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"23:16","end":"00:16","startHours":23.27470909833993,"endHours":24.27470909833993,"planetary_lord":"Venus"},{"name":"Hora 20","start":"00:16","end":"01:16","startHours":24.27470909833993,"endHours":25.27470909833993,"planetary_lord":"Sun"},{"name":"Hora 21","start":"01:16","end":"02:16","startHours":25.27470909833993,"endHours":26.27470909833993,"planetary_lord":"Mars"},{"name":"Hora 22","start":"02:16","end":"03:16","startHours":26.27470909833993,"endHours":27.27470909833993,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"03:16","end":"04:16","startHours":27.27470909833993,"endHours":28.27470909833993,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"04:16","end":"05:16","startHours":28.27470909833993,"endHours":29.27470909833993,"planetary_lord":"Moon"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Revatī"],"unfavorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Citrā","Svātī","Viśākhā","Anurādhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Siṃha","Kanyā","Dhanu","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Karka","Tulā","Vṛścika","Kumbha"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"South-West","rahuVasa":"North-West","anandadiYoga":{"name":"Padma","quality":"Auspicious"},"drikRitu":"Hemanta (Pre-winter) (Drik)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-22.760823870241353,"eotMinutes":-5.02390686534617,"ayanamsa":23.7134}},"calendars":{"vikram_samvat":2047,"vikram_samvatsara":"Subhānu","saka_samvat":1912,"saka_samvatsara":"Pramoda","bengali_samvat":1397,"malayalam_era":1166,"nanakshahi_year":521,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Śukla Pakṣa","solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Śukla Aṣṭamī · Vikram 2047 Subhānu · Śaka 1912 Pramoda"},"festivals":[{"id":"lohri","name":"Lohri","name_sanskrit":"लोहड़ी","tradition":"Regional","significance":"Punjab harvest festival; eve of Makara Saṅkrānti. (Approximated as 13/14 January annually; correct via Sun in Dhanu/Makara cusp.)","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":4},{"id":"dhanu-sankranti","name":"Dhanu Saṅkrānti","name_sanskrit":"धनु सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Sagittarius; Dhanu-māsa (Khara-māsa).","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":5}],"todays_walk":{"walk":{"id":"guru-walk","name":"Bṛhaspati Walk","name_sanskrit":"गुरु यात्रा","type":"graha","description":"Wisdom transmission + BG 4.34.","step_count":8,"url":"/walk/guru-walk"},"reason":"Guruvāra (Thursday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3137-12-25","event":"Bhīṣma's Mahaprasthan","chart_id":"bhishma","shared_marker":"same Śukla Aṣṭamī","url":"/day/-3137-12-25","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 4, 1990 CE · Perth, Australia · Vidhyamitra","description":"January 4, 1990 CE for Perth, Australia: Śukla Aṣṭamī, sūryodaya 05:16, sūryāsta 19:27.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1990-01-04","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1990-01-04","sa":"https://sa.vidhyamitra.com/city/perth/1990-01-04","hi":"https://hi.vidhyamitra.com/city/perth/1990-01-04","x-default":"https://vidhyamitra.com/city/perth/1990-01-04"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-19T05:15:44.307Z","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":"2026-05-19T05:15:44.307Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-19T05:15:44.307Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}