{"id":"vidhyamitra:city-day:perth:1990-04-04:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1990-04-04","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1990-04-04","date_display":"April 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":4,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2447985.770833,"kali_year":5091,"ahargana":1859520.2708,"sun":{"sidereal_longitude":350.4808,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":97.985,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":107.5041,"elapsed_within_tithi_degrees":11.5041},"nakshatra":{"number":8,"name":"Puṣya","pada":2,"moon_longitude":97.985,"elapsed_within_degrees":4.6516},"yoga":{"number":7,"name":"Sukarma","sum_longitude":88.4658},"karana":{"half_tithi_index":17,"name":"Kaulava"},"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":1990,"month":4,"day":4,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2447985.770833,"ahargana":1859520.2708,"kali_year":5091,"ayanamsa_lahiri":23.7169,"grahas":{"sun":{"sidereal_longitude":350.297099,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":100.135199,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false,"latitude":1.2152},"mars":{"sidereal_longitude":293.79049899999995,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":5.9205989999999815,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":69.49189899999999,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":304.0215989999999,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":270.618199,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":293.6674,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":113.6674,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","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":1990,"month":4,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2447985.770833,"kali_year":5091,"ahargana":1859520.2708,"sun":{"sidereal_longitude":350.4808,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":97.985,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":107.5041,"elapsed_within_tithi_degrees":11.5041},"nakshatra":{"number":8,"name":"Puṣya","pada":2,"moon_longitude":97.985,"elapsed_within_degrees":4.6516},"yoga":{"number":7,"name":"Sukarma","sum_longitude":88.4658},"karana":{"half_tithi_index":17,"name":"Kaulava"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.215,"elongation":107.504},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.215,"opposition_distance":72.496}},"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":"06:30","sunsetLocal":"18:10","solarNoonLocal":"12:20","dayLengthHours":11.670369695244604,"dayLengthDisplay":"11 Hours 40 Mins 13 Secs","nightLengthDisplay":"12 Hours 19 Mins 47 Secs","moonriseLocal":"14:27","moonsetLocal":"00:52","rahuKala":{"name":"Rāhu Kāla","start":"12:20","end":"13:47","startHours":12.332693718315504,"endHours":13.79148993022108,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"07:57","end":"09:25","startHours":7.956305082598776,"endHours":9.415101294504352,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:52","end":"12:20","startHours":10.873897506409929,"endHours":12.332693718315504,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:13","end":"09:37","startHours":9.22059513291694,"endHours":9.609607456091762,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:59","end":"07:18","startHours":6.983774274661726,"endHours":7.294984133201582,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:57","end":"12:43","startHours":11.943681395140683,"endHours":12.721706041490322,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:56","end":"05:43","startHours":4.94145957799392,"endHours":5.71948422434356,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:31","end":"06:30","startHours":5.52497806275615,"endHours":6.497508870693201,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:17","end":"15:03","startHours":14.277755334189603,"endHours":15.055779980539244,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:58","end":"18:22","startHours":17.967878565937806,"endHours":18.367878565937804,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:10","end":"18:39","startHours":18.167878565937805,"endHours":18.65414396990633,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:55","end":"19:40","startHours":17.917878565937805,"endHours":19.667878565937805,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:57","end":"00:43","startHours":23.943681395140683,"endHours":24.721706041490325,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"06:30","end":"07:57","startHours":6.497508870693201,"endHours":7.956305082598776,"quality":"auspicious"},{"name":"Amṛta","start":"07:57","end":"09:25","startHours":7.956305082598776,"endHours":9.415101294504352,"quality":"auspicious"},{"name":"Kāla","start":"09:25","end":"10:52","startHours":9.415101294504352,"endHours":10.873897506409929,"quality":"inauspicious"},{"name":"Śubha","start":"10:52","end":"12:20","startHours":10.873897506409929,"endHours":12.332693718315504,"quality":"auspicious"},{"name":"Roga","start":"12:20","end":"13:47","startHours":12.332693718315504,"endHours":13.79148993022108,"quality":"inauspicious"},{"name":"Udveg","start":"13:47","end":"15:15","startHours":13.79148993022108,"endHours":15.250286142126654,"quality":"inauspicious"},{"name":"Chala","start":"15:15","end":"16:43","startHours":15.250286142126654,"endHours":16.70908235403223,"quality":"neutral"},{"name":"Labha","start":"16:43","end":"18:10","startHours":16.70908235403223,"endHours":18.167878565937805,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"18:10","end":"19:43","startHours":18.167878565937805,"endHours":19.70908235403223,"quality":"inauspicious"},{"name":"Chala","start":"19:43","end":"21:15","startHours":19.70908235403223,"endHours":21.250286142126654,"quality":"neutral"},{"name":"Labha","start":"21:15","end":"22:47","startHours":21.250286142126654,"endHours":22.79148993022108,"quality":"auspicious"},{"name":"Amṛta","start":"22:47","end":"00:20","startHours":22.79148993022108,"endHours":24.332693718315504,"quality":"auspicious"},{"name":"Kāla","start":"00:20","end":"01:52","startHours":24.332693718315504,"endHours":25.87389750640993,"quality":"inauspicious"},{"name":"Śubha","start":"01:52","end":"03:25","startHours":25.87389750640993,"endHours":27.415101294504353,"quality":"auspicious"},{"name":"Roga","start":"03:25","end":"04:57","startHours":27.415101294504353,"endHours":28.956305082598774,"quality":"inauspicious"},{"name":"Udveg","start":"04:57","end":"06:30","startHours":28.956305082598774,"endHours":30.497508870693203,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:30","end":"07:30","startHours":6.497508870693201,"endHours":7.497508870693201,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"07:30","end":"08:30","startHours":7.497508870693201,"endHours":8.497508870693201,"planetary_lord":"Venus"},{"name":"Hora 3","start":"08:30","end":"09:30","startHours":8.497508870693201,"endHours":9.497508870693201,"planetary_lord":"Sun"},{"name":"Hora 4","start":"09:30","end":"10:30","startHours":9.497508870693201,"endHours":10.497508870693201,"planetary_lord":"Mars"},{"name":"Hora 5","start":"10:30","end":"11:30","startHours":10.497508870693201,"endHours":11.497508870693201,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"11:30","end":"12:30","startHours":11.497508870693201,"endHours":12.497508870693201,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"12:30","end":"13:30","startHours":12.497508870693201,"endHours":13.497508870693201,"planetary_lord":"Moon"},{"name":"Hora 8","start":"13:30","end":"14:30","startHours":13.497508870693201,"endHours":14.497508870693201,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"14:30","end":"15:30","startHours":14.497508870693201,"endHours":15.497508870693201,"planetary_lord":"Venus"},{"name":"Hora 10","start":"15:30","end":"16:30","startHours":15.497508870693201,"endHours":16.497508870693203,"planetary_lord":"Sun"},{"name":"Hora 11","start":"16:30","end":"17:30","startHours":16.497508870693203,"endHours":17.497508870693203,"planetary_lord":"Mars"},{"name":"Hora 12","start":"17:30","end":"18:30","startHours":17.497508870693203,"endHours":18.497508870693203,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"18:30","end":"19:30","startHours":18.497508870693203,"endHours":19.497508870693203,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"19:30","end":"20:30","startHours":19.497508870693203,"endHours":20.497508870693203,"planetary_lord":"Moon"},{"name":"Hora 15","start":"20:30","end":"21:30","startHours":20.497508870693203,"endHours":21.497508870693203,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"21:30","end":"22:30","startHours":21.497508870693203,"endHours":22.497508870693203,"planetary_lord":"Venus"},{"name":"Hora 17","start":"22:30","end":"23:30","startHours":22.497508870693203,"endHours":23.497508870693203,"planetary_lord":"Sun"},{"name":"Hora 18","start":"23:30","end":"00:30","startHours":23.497508870693203,"endHours":24.497508870693203,"planetary_lord":"Mars"},{"name":"Hora 19","start":"00:30","end":"01:30","startHours":24.497508870693203,"endHours":25.497508870693203,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"01:30","end":"02:30","startHours":25.497508870693203,"endHours":26.497508870693203,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"02:30","end":"03:30","startHours":26.497508870693203,"endHours":27.497508870693203,"planetary_lord":"Moon"},{"name":"Hora 22","start":"03:30","end":"04:30","startHours":27.497508870693203,"endHours":28.497508870693203,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"04:30","end":"05:30","startHours":28.497508870693203,"endHours":29.497508870693203,"planetary_lord":"Venus"},{"name":"Hora 24","start":"05:30","end":"06:30","startHours":29.497508870693203,"endHours":30.497508870693203,"planetary_lord":"Sun"}],"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":["Meṣa","Vṛṣabha","Karka","Kanyā","Dhanu","Makara"],"unfavorable_rashis":["Mithuna","Siṃha","Tulā","Vṛścika","Kumbha","Mīna"]},"dishaShool":"North (Uttara)","chandraVasa":"South-West","rahuVasa":"South-West","anandadiYoga":{"name":"Śubha","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring) (tropical)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":5.526980868956578,"eotMinutes":-3.4036230989301703,"ayanamsa":23.7169}},"calendars":{"vikram_samvat":2047,"vikram_samvatsara":"Subhānu","saka_samvat":1912,"saka_samvatsara":"Pramoda","bengali_samvat":1397,"malayalam_era":1166,"nanakshahi_year":521,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Caitra","lunar_month_amanta":"Caitra","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mīna (Paṅkuṇi)","ritu":"Vasanta (Spring)","display_summary":"Caitra Śukla Navamī · Vikram 2047 Subhānu · Śaka 1912 Pramoda"},"festivals":[{"id":"rama-navami","name":"Rāma Navamī","name_sanskrit":"राम नवमी","tradition":"Vaishnava","associated_deity":"Rāma (18th avatāra of Krishna)","deity_avatara_index":18,"significance":"Bhagavān Rāma's birth at Ayodhyā. Sūryavaṃśa's most exalted moment.","vrata":true,"primary_observance":"Madhyāhna (noon) abhiṣekam in Ayodhyā tradition","detection":{"tithi_number":9,"tithi_paksha":"Śukla","lunar_month":"Caitra"},"precedence":1,"related_chart":"rama","historical_anchor":{"event":"Bhagavān Rāma's birth at Ayodhyā","date_julian":"-1626101-04-03","location":"Ayodhyā"},"sources":["Vālmīki Rāmāyaṇa, Bāla-Kāṇḍa 1.18"]}],"todays_walk":{"walk":{"id":"rama-navami-walk","name":"Rāma Navamī Walk","name_sanskrit":"राम नवमी यात्रा","type":"festival","description":"Vālmīki Bāla-Kāṇḍa selections + BG 4.7-8 (avatāra principle).","step_count":9,"url":"/walk/rama-navami-walk"},"reason":"Today is Rāma Navamī — its dedicated walk."},"cosmic_resonances":[{"historical_date":"-1626101-04-03","event":"Bhagavān Rāma's birth at Ayodhyā","chart_id":"rama","shared_marker":"same Śukla Navamī","url":"/day/-1626101-04-03","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 April 4, 1990 CE · Perth, Australia · Vidhyamitra","description":"April 4, 1990 CE for Perth, Australia: Śukla Navamī, sūryodaya 06:30, sūryāsta 18:10.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1990-04-04","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1990-04-04","sa":"https://sa.vidhyamitra.com/city/perth/1990-04-04","hi":"https://hi.vidhyamitra.com/city/perth/1990-04-04","x-default":"https://vidhyamitra.com/city/perth/1990-04-04"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T18:51:06.475Z","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":"2026-05-31T18:51:06.475Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T18:51:06.475Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}