{"id":"vidhyamitra:city-day:perth:1978-04-11:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1978-04-11","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1978-04-11","date_display":"April 11, 1978 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":1978,"month":4,"day":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2443609.770833,"kali_year":5079,"ahargana":1855144.2708,"sun":{"sidereal_longitude":357.4487,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":39.6802,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":42.2315,"elapsed_within_tithi_degrees":6.2315},"nakshatra":{"number":3,"name":"Kṛttikā","pada":4,"moon_longitude":39.6802,"elapsed_within_degrees":13.0135},"yoga":{"number":3,"name":"Āyuṣmān","sum_longitude":37.1289},"karana":{"half_tithi_index":7,"name":"Viṣṭi"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"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":1978,"month":4,"day":11,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2443609.770833,"ahargana":1855144.2708,"kali_year":5079,"ayanamsa_lahiri":23.5495,"grahas":{"sun":{"sidereal_longitude":357.255494,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"moon":{"sidereal_longitude":37.18479400000001,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":4},"retrograde":false,"latitude":-3.6463},"mars":{"sidereal_longitude":96.86219399999999,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":358.892894,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":true},"jupiter":{"sidereal_longitude":66.06449399999997,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":16.83579400000002,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":120.21319399999999,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":165.529,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":345.529,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","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":1978,"month":4,"day":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2443609.770833,"kali_year":5079,"ahargana":1855144.2708,"sun":{"sidereal_longitude":357.4487,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":39.6802,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":42.2315,"elapsed_within_tithi_degrees":6.2315},"nakshatra":{"number":3,"name":"Kṛttikā","pada":4,"moon_longitude":39.6802,"elapsed_within_degrees":13.0135},"yoga":{"number":3,"name":"Āyuṣmān","sum_longitude":37.1289},"karana":{"half_tithi_index":7,"name":"Viṣṭi"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.646,"elongation":42.231},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.646,"opposition_distance":137.769}},"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":"06:34","sunsetLocal":"18:01","solarNoonLocal":"12:18","dayLengthHours":11.451851659037493,"dayLengthDisplay":"11 Hours 27 Mins 07 Secs","nightLengthDisplay":"12 Hours 32 Mins 53 Secs","moonriseLocal":"09:48","moonsetLocal":"20:07","rahuKala":{"name":"Rāhu Kāla","start":"15:10","end":"16:36","startHours":15.160974363767322,"endHours":16.59245582114701,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:26","end":"10:52","startHours":9.435048534248576,"endHours":10.866529991628262,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:18","end":"13:44","startHours":12.298011449007948,"endHours":13.729492906387636,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:15","end":"09:38","startHours":9.244184339931284,"endHours":9.625912728565867,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:03","end":"07:21","startHours":7.049246105282432,"endHours":7.354628816190099,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:55","end":"12:41","startHours":11.916283060373365,"endHours":12.679739837642531,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:03","end":"05:49","startHours":5.0451720649508704,"endHours":5.8086288422200365,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:37","end":"06:34","startHours":5.617764647902745,"endHours":6.572085619489203,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:12","end":"14:58","startHours":14.206653392180865,"endHours":14.970110169450031,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:49","end":"18:13","startHours":17.823937278526696,"endHours":18.223937278526694,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:01","end":"18:30","startHours":18.023937278526695,"endHours":18.501097764319923,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:46","end":"19:31","startHours":17.773937278526695,"endHours":19.523937278526695,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:55","end":"00:41","startHours":23.916283060373363,"endHours":24.679739837642533,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"06:34","end":"08:00","startHours":6.572085619489203,"endHours":8.003567076868888,"quality":"inauspicious"},{"name":"Udveg","start":"08:00","end":"09:26","startHours":8.003567076868888,"endHours":9.435048534248576,"quality":"inauspicious"},{"name":"Chala","start":"09:26","end":"10:52","startHours":9.435048534248576,"endHours":10.866529991628262,"quality":"neutral"},{"name":"Labha","start":"10:52","end":"12:18","startHours":10.866529991628262,"endHours":12.298011449007948,"quality":"auspicious"},{"name":"Amṛta","start":"12:18","end":"13:44","startHours":12.298011449007948,"endHours":13.729492906387636,"quality":"auspicious"},{"name":"Kāla","start":"13:44","end":"15:10","startHours":13.729492906387636,"endHours":15.160974363767322,"quality":"inauspicious"},{"name":"Śubha","start":"15:10","end":"16:36","startHours":15.160974363767322,"endHours":16.59245582114701,"quality":"auspicious"},{"name":"Roga","start":"16:36","end":"18:01","startHours":16.59245582114701,"endHours":18.023937278526695,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"18:01","end":"19:36","startHours":18.023937278526695,"endHours":19.59245582114701,"quality":"inauspicious"},{"name":"Śubha","start":"19:36","end":"21:10","startHours":19.59245582114701,"endHours":21.160974363767323,"quality":"auspicious"},{"name":"Roga","start":"21:10","end":"22:44","startHours":21.160974363767323,"endHours":22.729492906387634,"quality":"inauspicious"},{"name":"Udveg","start":"22:44","end":"00:18","startHours":22.729492906387634,"endHours":24.298011449007948,"quality":"inauspicious"},{"name":"Chala","start":"00:18","end":"01:52","startHours":24.298011449007948,"endHours":25.866529991628262,"quality":"neutral"},{"name":"Labha","start":"01:52","end":"03:26","startHours":25.866529991628262,"endHours":27.435048534248576,"quality":"auspicious"},{"name":"Amṛta","start":"03:26","end":"05:00","startHours":27.435048534248576,"endHours":29.00356707686889,"quality":"auspicious"},{"name":"Kāla","start":"05:00","end":"06:34","startHours":29.00356707686889,"endHours":30.5720856194892,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:34","end":"07:34","startHours":6.572085619489203,"endHours":7.572085619489203,"planetary_lord":"Mars"},{"name":"Hora 2","start":"07:34","end":"08:34","startHours":7.572085619489203,"endHours":8.572085619489203,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"08:34","end":"09:34","startHours":8.572085619489203,"endHours":9.572085619489203,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"09:34","end":"10:34","startHours":9.572085619489203,"endHours":10.572085619489203,"planetary_lord":"Moon"},{"name":"Hora 5","start":"10:34","end":"11:34","startHours":10.572085619489203,"endHours":11.572085619489203,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"11:34","end":"12:34","startHours":11.572085619489203,"endHours":12.572085619489203,"planetary_lord":"Venus"},{"name":"Hora 7","start":"12:34","end":"13:34","startHours":12.572085619489203,"endHours":13.572085619489203,"planetary_lord":"Sun"},{"name":"Hora 8","start":"13:34","end":"14:34","startHours":13.572085619489203,"endHours":14.572085619489203,"planetary_lord":"Mars"},{"name":"Hora 9","start":"14:34","end":"15:34","startHours":14.572085619489203,"endHours":15.572085619489203,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"15:34","end":"16:34","startHours":15.572085619489203,"endHours":16.5720856194892,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"16:34","end":"17:34","startHours":16.5720856194892,"endHours":17.5720856194892,"planetary_lord":"Moon"},{"name":"Hora 12","start":"17:34","end":"18:34","startHours":17.5720856194892,"endHours":18.5720856194892,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"18:34","end":"19:34","startHours":18.5720856194892,"endHours":19.5720856194892,"planetary_lord":"Venus"},{"name":"Hora 14","start":"19:34","end":"20:34","startHours":19.5720856194892,"endHours":20.5720856194892,"planetary_lord":"Sun"},{"name":"Hora 15","start":"20:34","end":"21:34","startHours":20.5720856194892,"endHours":21.5720856194892,"planetary_lord":"Mars"},{"name":"Hora 16","start":"21:34","end":"22:34","startHours":21.5720856194892,"endHours":22.5720856194892,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"22:34","end":"23:34","startHours":22.5720856194892,"endHours":23.5720856194892,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"23:34","end":"00:34","startHours":23.5720856194892,"endHours":24.5720856194892,"planetary_lord":"Moon"},{"name":"Hora 19","start":"00:34","end":"01:34","startHours":24.5720856194892,"endHours":25.5720856194892,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"01:34","end":"02:34","startHours":25.5720856194892,"endHours":26.5720856194892,"planetary_lord":"Venus"},{"name":"Hora 21","start":"02:34","end":"03:34","startHours":26.5720856194892,"endHours":27.5720856194892,"planetary_lord":"Sun"},{"name":"Hora 22","start":"03:34","end":"04:34","startHours":27.5720856194892,"endHours":28.5720856194892,"planetary_lord":"Mars"},{"name":"Hora 23","start":"04:34","end":"05:34","startHours":28.5720856194892,"endHours":29.5720856194892,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"05:34","end":"06:34","startHours":29.5720856194892,"endHours":30.5720856194892,"planetary_lord":"Saturn"}],"taraBala":{"favorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Hasta","Citrā","Svātī","Viśākhā","Anurādhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Revatī"],"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":"North (Uttara)","chandraVasa":"South-East","rahuVasa":"North","anandadiYoga":{"name":"Chatra","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":8.121340784507431,"eotMinutes":-1.322686940476858,"ayanamsa":23.5495}},"calendars":{"vikram_samvat":2035,"vikram_samvatsara":"Prajāpati","saka_samvat":1900,"saka_samvatsara":"Kālayukta","bengali_samvat":1385,"malayalam_era":1154,"nanakshahi_year":509,"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 Caturthī · Vikram 2035 Prajāpati · Śaka 1900 Kālayukta"},"festivals":[{"id":"angarika-chaturthi","name":"Aṅgāraka Caturthī (Tuesday Caturthī)","name_sanskrit":"अङ्गारक चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa + Maṅgala","significance":"Tuesday-Caturthī (rare); supremely auspicious for Maṅgala-doṣa-nivāraṇa.","vrata":true,"detection":{"any_of":[{"tithi_number":4,"vara_name":"Maṅgalavāra (Tuesday)"},{"tithi_number":19,"vara_name":"Maṅgalavāra (Tuesday)"}]},"precedence":3},{"id":"vinayaka-chaturthi","name":"Vināyaka Caturthī (monthly)","name_sanskrit":"विनायक चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Śukla-pakṣa Caturthī; auspicious for new ventures.","vrata":true,"detection":{"tithi_number":4,"tithi_paksha":"Śukla"},"precedence":6}],"todays_walk":{"walk":{"id":"mangala-walk","name":"Maṅgala Walk","name_sanskrit":"मङ्गल यात्रा","type":"graha","description":"Right action + BG 2.31-38 (kṣatriya-dharma).","step_count":7,"url":"/walk/mangala-walk"},"reason":"Maṅgalavāra (Tuesday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3137-10-04","event":"Mahābhārata Day 1 (Bhagavad Gītā delivered)","chart_id":"krishna","shared_marker":"same Kṛttikā","url":"/day/-3137-10-04","relevance":0.5},{"historical_date":"-3137-12-25","event":"Bhīṣma's Mahaprasthan","chart_id":"bhishma","shared_marker":"same Kṛttikā","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 April 11, 1978 CE · Perth, Australia · Vidhyamitra","description":"April 11, 1978 CE for Perth, Australia: Śukla Caturthī, sūryodaya 06:34, sūryāsta 18:01.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1978-04-11","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1978-04-11","sa":"https://sa.vidhyamitra.com/city/perth/1978-04-11","hi":"https://hi.vidhyamitra.com/city/perth/1978-04-11","x-default":"https://vidhyamitra.com/city/perth/1978-04-11"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T13:38:07.536Z","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":"2026-06-01T13:38:07.536Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T13:38:07.536Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}