{"id":"vidhyamitra:city-day:perth:1983-04-07:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1983-04-07","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1983-04-07","date_display":"April 7, 1983 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":1983,"month":4,"day":7,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2445431.770833,"kali_year":5084,"ahargana":1856966.2708,"sun":{"sidereal_longitude":353.242,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":280.6096,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":24,"name":"Navamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Navamī","elongation_degrees":287.3677,"elapsed_within_tithi_degrees":11.3677},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1,"moon_longitude":280.6096,"elapsed_within_degrees":0.6096},"yoga":{"number":21,"name":"Siddha","sum_longitude":273.8516},"karana":{"half_tithi_index":47,"name":"Gara"},"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":1983,"month":4,"day":7,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2445431.770833,"ahargana":1856966.2708,"kali_year":5084,"ayanamsa_lahiri":23.6192,"grahas":{"sun":{"sidereal_longitude":353.048281,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":281.226081,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":false,"latitude":-2.3574},"mars":{"sidereal_longitude":7.696181000000024,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":5.260180999999989,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":227.90648099999999,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"retrograde":true},"venus":{"sidereal_longitude":29.015180999999984,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":188.31908099999998,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":68.9906,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":248.9906,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","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":1983,"month":4,"day":7,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2445431.770833,"kali_year":5084,"ahargana":1856966.2708,"sun":{"sidereal_longitude":353.242,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":280.6096,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":24,"name":"Navamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Navamī","elongation_degrees":287.3677,"elapsed_within_tithi_degrees":11.3677},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1,"moon_longitude":280.6096,"elapsed_within_degrees":0.6096},"yoga":{"number":21,"name":"Siddha","sum_longitude":273.8516},"karana":{"half_tithi_index":47,"name":"Gara"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.357,"elongation":72.632},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.357,"opposition_distance":107.368}},"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":"06:32","sunsetLocal":"18:07","solarNoonLocal":"12:19","dayLengthHours":11.584461632627658,"dayLengthDisplay":"11 Hours 35 Mins 04 Secs","nightLengthDisplay":"12 Hours 24 Mins 56 Secs","moonriseLocal":"00:39","moonsetLocal":"14:24","rahuKala":{"name":"Rāhu Kāla","start":"13:46","end":"15:13","startHours":13.765491246492338,"endHours":15.213548950570797,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"06:32","end":"07:58","startHours":6.525202726100052,"endHours":7.9732604301785095,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"09:25","end":"10:52","startHours":9.421318134256968,"endHours":10.869375838335424,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:14","end":"09:37","startHours":9.228243773713173,"endHours":9.61439249480076,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:00","end":"07:19","startHours":7.007888627459538,"endHours":7.316807604329609,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:56","end":"12:42","startHours":11.931284821326292,"endHours":12.703582263501469,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:59","end":"05:45","startHours":4.980607841749698,"endHours":5.752905283924875,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:34","end":"06:32","startHours":5.559830923381081,"endHours":6.525202726100052,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:15","end":"15:01","startHours":14.248177147851823,"endHours":15.020474590027,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:55","end":"18:19","startHours":17.90966435872771,"endHours":18.30966435872771,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:07","end":"18:36","startHours":18.10966435872771,"endHours":18.592350260087194,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:52","end":"19:37","startHours":17.85966435872771,"endHours":19.60966435872771,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:56","end":"00:42","startHours":23.93128482132629,"endHours":24.70358226350147,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"06:32","end":"07:58","startHours":6.525202726100052,"endHours":7.9732604301785095,"quality":"auspicious"},{"name":"Roga","start":"07:58","end":"09:25","startHours":7.9732604301785095,"endHours":9.421318134256968,"quality":"inauspicious"},{"name":"Udveg","start":"09:25","end":"10:52","startHours":9.421318134256968,"endHours":10.869375838335424,"quality":"inauspicious"},{"name":"Chala","start":"10:52","end":"12:19","startHours":10.869375838335424,"endHours":12.31743354241388,"quality":"neutral"},{"name":"Labha","start":"12:19","end":"13:46","startHours":12.31743354241388,"endHours":13.765491246492338,"quality":"auspicious"},{"name":"Amṛta","start":"13:46","end":"15:13","startHours":13.765491246492338,"endHours":15.213548950570797,"quality":"auspicious"},{"name":"Kāla","start":"15:13","end":"16:40","startHours":15.213548950570797,"endHours":16.66160665464925,"quality":"inauspicious"},{"name":"Śubha","start":"16:40","end":"18:07","startHours":16.66160665464925,"endHours":18.10966435872771,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"18:07","end":"19:40","startHours":18.10966435872771,"endHours":19.66160665464925,"quality":"auspicious"},{"name":"Kāla","start":"19:40","end":"21:13","startHours":19.66160665464925,"endHours":21.213548950570797,"quality":"inauspicious"},{"name":"Śubha","start":"21:13","end":"22:46","startHours":21.213548950570797,"endHours":22.76549124649234,"quality":"auspicious"},{"name":"Roga","start":"22:46","end":"00:19","startHours":22.76549124649234,"endHours":24.31743354241388,"quality":"inauspicious"},{"name":"Udveg","start":"00:19","end":"01:52","startHours":24.31743354241388,"endHours":25.869375838335422,"quality":"inauspicious"},{"name":"Chala","start":"01:52","end":"03:25","startHours":25.869375838335422,"endHours":27.421318134256964,"quality":"neutral"},{"name":"Labha","start":"03:25","end":"04:58","startHours":27.421318134256964,"endHours":28.97326043017851,"quality":"auspicious"},{"name":"Amṛta","start":"04:58","end":"06:32","startHours":28.97326043017851,"endHours":30.52520272610005,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:32","end":"07:32","startHours":6.525202726100052,"endHours":7.525202726100052,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"07:32","end":"08:32","startHours":7.525202726100052,"endHours":8.525202726100051,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"08:32","end":"09:32","startHours":8.525202726100051,"endHours":9.525202726100051,"planetary_lord":"Moon"},{"name":"Hora 4","start":"09:32","end":"10:32","startHours":9.525202726100051,"endHours":10.525202726100051,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"10:32","end":"11:32","startHours":10.525202726100051,"endHours":11.525202726100051,"planetary_lord":"Venus"},{"name":"Hora 6","start":"11:32","end":"12:32","startHours":11.525202726100051,"endHours":12.525202726100051,"planetary_lord":"Sun"},{"name":"Hora 7","start":"12:32","end":"13:32","startHours":12.525202726100051,"endHours":13.525202726100051,"planetary_lord":"Mars"},{"name":"Hora 8","start":"13:32","end":"14:32","startHours":13.525202726100051,"endHours":14.525202726100051,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"14:32","end":"15:32","startHours":14.525202726100051,"endHours":15.525202726100051,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"15:32","end":"16:32","startHours":15.525202726100051,"endHours":16.52520272610005,"planetary_lord":"Moon"},{"name":"Hora 11","start":"16:32","end":"17:32","startHours":16.52520272610005,"endHours":17.52520272610005,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"17:32","end":"18:32","startHours":17.52520272610005,"endHours":18.52520272610005,"planetary_lord":"Venus"},{"name":"Hora 13","start":"18:32","end":"19:32","startHours":18.52520272610005,"endHours":19.52520272610005,"planetary_lord":"Sun"},{"name":"Hora 14","start":"19:32","end":"20:32","startHours":19.52520272610005,"endHours":20.52520272610005,"planetary_lord":"Mars"},{"name":"Hora 15","start":"20:32","end":"21:32","startHours":20.52520272610005,"endHours":21.52520272610005,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"21:32","end":"22:32","startHours":21.52520272610005,"endHours":22.52520272610005,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"22:32","end":"23:32","startHours":22.52520272610005,"endHours":23.52520272610005,"planetary_lord":"Moon"},{"name":"Hora 18","start":"23:32","end":"00:32","startHours":23.52520272610005,"endHours":24.52520272610005,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"00:32","end":"01:32","startHours":24.52520272610005,"endHours":25.52520272610005,"planetary_lord":"Venus"},{"name":"Hora 20","start":"01:32","end":"02:32","startHours":25.52520272610005,"endHours":26.52520272610005,"planetary_lord":"Sun"},{"name":"Hora 21","start":"02:32","end":"03:32","startHours":26.52520272610005,"endHours":27.52520272610005,"planetary_lord":"Mars"},{"name":"Hora 22","start":"03:32","end":"04:32","startHours":27.52520272610005,"endHours":28.52520272610005,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"04:32","end":"05:32","startHours":28.52520272610005,"endHours":29.52520272610005,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"05:32","end":"06:32","startHours":29.52520272610005,"endHours":30.52520272610005,"planetary_lord":"Moon"}],"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":["Mithuna","Karka","Tulā","Vṛścika","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Dhanu","Kumbha"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"South-East","rahuVasa":"North-West","anandadiYoga":{"name":"Mudgara","quality":"Inauspicious"},"tropicalRitu":"Vasanta (Spring) (tropical)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":6.550354421921678,"eotMinutes":-2.4880125448329173,"ayanamsa":23.6192}},"calendars":{"vikram_samvat":2040,"vikram_samvatsara":"Dhātṛ","saka_samvat":1905,"saka_samvatsara":"Rudhirodgāri","bengali_samvat":1390,"malayalam_era":1159,"nanakshahi_year":514,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra (Adhika) Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Caitra","lunar_month_amanta":"Caitra","lunar_month_is_adhika":true,"lunar_month_purnimanta_is_adhika":true,"lunar_month_amanta_is_adhika":true,"solar_month":"Mīna (Paṅkuṇi)","ritu":"Vasanta (Spring)","display_summary":"Caitra (Adhika) Kṛṣṇa Navamī · Vikram 2040 Dhātṛ · Śaka 1905 Rudhirodgāri"},"festivals":[],"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":[]},"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 7, 1983 CE · Perth, Australia · Vidhyamitra","description":"April 7, 1983 CE for Perth, Australia: Kṛṣṇa Navamī, sūryodaya 06:32, sūryāsta 18:07.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1983-04-07","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1983-04-07","sa":"https://sa.vidhyamitra.com/city/perth/1983-04-07","hi":"https://hi.vidhyamitra.com/city/perth/1983-04-07","x-default":"https://vidhyamitra.com/city/perth/1983-04-07"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T06:44:08.056Z","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":"2026-05-31T06:44:08.056Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T06:44:08.056Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}