{"id":"vidhyamitra:city-day:perth:1980-09-01:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1980-09-01","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1980-09-01","date_display":"September 1, 1980 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":1980,"month":9,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444483.770833,"kali_year":5082,"ahargana":1856018.2708,"sun":{"sidereal_longitude":134.5351,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":32.3544,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":22,"name":"Saptamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Saptamī","elongation_degrees":257.8194,"elapsed_within_tithi_degrees":5.8194},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2,"moon_longitude":32.3544,"elapsed_within_degrees":5.6878},"yoga":{"number":13,"name":"Vyāghāta","sum_longitude":166.8895},"karana":{"half_tithi_index":42,"name":"Viṣṭi"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"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":1980,"month":9,"day":1,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444483.770833,"ahargana":1856018.2708,"kali_year":5082,"ayanamsa_lahiri":23.5829,"grahas":{"sun":{"sidereal_longitude":135.175901,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":35.89930099999998,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":3},"retrograde":false,"latitude":-4.4933},"mars":{"sidereal_longitude":188.543501,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":140.66700100000003,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":144.472401,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":4},"retrograde":false},"venus":{"sidereal_longitude":89.733001,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":153.651301,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":119.2202,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":299.2202,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"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":1980,"month":9,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444483.770833,"kali_year":5082,"ahargana":1856018.2708,"sun":{"sidereal_longitude":134.5351,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":32.3544,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":22,"name":"Saptamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Saptamī","elongation_degrees":257.8194,"elapsed_within_tithi_degrees":5.8194},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2,"moon_longitude":32.3544,"elapsed_within_degrees":5.6878},"yoga":{"number":13,"name":"Vyāghāta","sum_longitude":166.8895},"karana":{"half_tithi_index":42,"name":"Viṣṭi"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.493,"elongation":102.181},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.493,"opposition_distance":77.819}},"eclipse_window_40days":[{"offset_days":-6,"type":"lunar","occurs":true,"moon_latitude":-0.515,"opposition_distance":2.645}]},"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":"06:33","sunsetLocal":"17:59","solarNoonLocal":"12:16","dayLengthHours":11.437980928696664,"dayLengthDisplay":"11 Hours 26 Mins 17 Secs","nightLengthDisplay":"12 Hours 33 Mins 43 Secs","moonriseLocal":"00:29","moonsetLocal":"10:49","rahuKala":{"name":"Rāhu Kāla","start":"07:59","end":"09:25","startHours":7.978790188220861,"endHours":9.408537804307944,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:50","end":"12:16","startHours":10.838285420395028,"endHours":12.268033036482109,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:42","end":"15:08","startHours":13.697780652569193,"endHours":15.127528268656278,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:13","end":"09:36","startHours":9.217904788829665,"endHours":9.599170819786222,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:02","end":"07:20","startHours":7.025625110829472,"endHours":7.330637935594716,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:53","end":"12:39","startHours":11.886767005525556,"endHours":12.649299067438665,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:01","end":"05:47","startHours":5.023978448307556,"endHours":5.786510510220666,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:36","end":"06:33","startHours":5.595877494742389,"endHours":6.549042572133778,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:10","end":"14:56","startHours":14.174363191264888,"endHours":14.936895253178,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:47","end":"18:11","startHours":17.787023500830443,"endHours":18.187023500830442,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:59","end":"18:28","startHours":17.987023500830443,"endHours":18.463606039526137,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:44","end":"19:29","startHours":17.737023500830443,"endHours":19.487023500830443,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:53","end":"00:39","startHours":23.886767005525552,"endHours":24.649299067438665,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"06:33","end":"07:59","startHours":6.549042572133778,"endHours":7.978790188220861,"quality":"auspicious"},{"name":"Kāla","start":"07:59","end":"09:25","startHours":7.978790188220861,"endHours":9.408537804307944,"quality":"inauspicious"},{"name":"Śubha","start":"09:25","end":"10:50","startHours":9.408537804307944,"endHours":10.838285420395028,"quality":"auspicious"},{"name":"Roga","start":"10:50","end":"12:16","startHours":10.838285420395028,"endHours":12.268033036482109,"quality":"inauspicious"},{"name":"Udveg","start":"12:16","end":"13:42","startHours":12.268033036482109,"endHours":13.697780652569193,"quality":"inauspicious"},{"name":"Chala","start":"13:42","end":"15:08","startHours":13.697780652569193,"endHours":15.127528268656278,"quality":"neutral"},{"name":"Labha","start":"15:08","end":"16:33","startHours":15.127528268656278,"endHours":16.55727588474336,"quality":"auspicious"},{"name":"Amṛta","start":"16:33","end":"17:59","startHours":16.55727588474336,"endHours":17.987023500830443,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"17:59","end":"19:33","startHours":17.987023500830443,"endHours":19.55727588474336,"quality":"neutral"},{"name":"Labha","start":"19:33","end":"21:08","startHours":19.55727588474336,"endHours":21.127528268656278,"quality":"auspicious"},{"name":"Amṛta","start":"21:08","end":"22:42","startHours":21.127528268656278,"endHours":22.697780652569193,"quality":"auspicious"},{"name":"Kāla","start":"22:42","end":"00:16","startHours":22.697780652569193,"endHours":24.26803303648211,"quality":"inauspicious"},{"name":"Śubha","start":"00:16","end":"01:50","startHours":24.26803303648211,"endHours":25.838285420395028,"quality":"auspicious"},{"name":"Roga","start":"01:50","end":"03:25","startHours":25.838285420395028,"endHours":27.408537804307944,"quality":"inauspicious"},{"name":"Udveg","start":"03:25","end":"04:59","startHours":27.408537804307944,"endHours":28.978790188220863,"quality":"inauspicious"},{"name":"Chala","start":"04:59","end":"06:33","startHours":28.978790188220863,"endHours":30.54904257213378,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"06:33","end":"07:33","startHours":6.549042572133778,"endHours":7.549042572133778,"planetary_lord":"Moon"},{"name":"Hora 2","start":"07:33","end":"08:33","startHours":7.549042572133778,"endHours":8.549042572133779,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"08:33","end":"09:33","startHours":8.549042572133779,"endHours":9.549042572133779,"planetary_lord":"Venus"},{"name":"Hora 4","start":"09:33","end":"10:33","startHours":9.549042572133779,"endHours":10.549042572133779,"planetary_lord":"Sun"},{"name":"Hora 5","start":"10:33","end":"11:33","startHours":10.549042572133779,"endHours":11.549042572133779,"planetary_lord":"Mars"},{"name":"Hora 6","start":"11:33","end":"12:33","startHours":11.549042572133779,"endHours":12.549042572133779,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"12:33","end":"13:33","startHours":12.549042572133779,"endHours":13.549042572133779,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"13:33","end":"14:33","startHours":13.549042572133779,"endHours":14.549042572133779,"planetary_lord":"Moon"},{"name":"Hora 9","start":"14:33","end":"15:33","startHours":14.549042572133779,"endHours":15.549042572133779,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"15:33","end":"16:33","startHours":15.549042572133779,"endHours":16.54904257213378,"planetary_lord":"Venus"},{"name":"Hora 11","start":"16:33","end":"17:33","startHours":16.54904257213378,"endHours":17.54904257213378,"planetary_lord":"Sun"},{"name":"Hora 12","start":"17:33","end":"18:33","startHours":17.54904257213378,"endHours":18.54904257213378,"planetary_lord":"Mars"},{"name":"Hora 13","start":"18:33","end":"19:33","startHours":18.54904257213378,"endHours":19.54904257213378,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"19:33","end":"20:33","startHours":19.54904257213378,"endHours":20.54904257213378,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"20:33","end":"21:33","startHours":20.54904257213378,"endHours":21.54904257213378,"planetary_lord":"Moon"},{"name":"Hora 16","start":"21:33","end":"22:33","startHours":21.54904257213378,"endHours":22.54904257213378,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"22:33","end":"23:33","startHours":22.54904257213378,"endHours":23.54904257213378,"planetary_lord":"Venus"},{"name":"Hora 18","start":"23:33","end":"00:33","startHours":23.54904257213378,"endHours":24.54904257213378,"planetary_lord":"Sun"},{"name":"Hora 19","start":"00:33","end":"01:33","startHours":24.54904257213378,"endHours":25.54904257213378,"planetary_lord":"Mars"},{"name":"Hora 20","start":"01:33","end":"02:33","startHours":25.54904257213378,"endHours":26.54904257213378,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"02:33","end":"03:33","startHours":26.54904257213378,"endHours":27.54904257213378,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"03:33","end":"04:33","startHours":27.54904257213378,"endHours":28.54904257213378,"planetary_lord":"Moon"},{"name":"Hora 23","start":"04:33","end":"05:33","startHours":28.54904257213378,"endHours":29.54904257213378,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"05:33","end":"06:33","startHours":29.54904257213378,"endHours":30.54904257213378,"planetary_lord":"Venus"}],"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":"East (Pūrva)","chandraVasa":"South-East","rahuVasa":"North-East","anandadiYoga":{"name":"Dhvaja","quality":"Auspicious"},"tropicalRitu":"Varṣā (Monsoon) (tropical)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":8.284959014990795,"eotMinutes":0.47601781107335894,"ayanamsa":23.5829}},"calendars":{"vikram_samvat":2037,"vikram_samvatsara":"Śrīmukha","saka_samvat":1902,"saka_samvatsara":"Raudra","bengali_samvat":1387,"malayalam_era":1156,"nanakshahi_year":511,"lunar_month":"Bhādrapada","lunar_month_paksha_full":"Bhādrapada Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Bhādrapada","lunar_month_amanta":"Śrāvaṇa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Siṃha (Āvaṇi)","ritu":"Varṣā (Monsoon)","display_summary":"Bhādrapada Kṛṣṇa Saptamī · Vikram 2037 Śrīmukha · Śaka 1902 Raudra"},"festivals":[],"todays_walk":{"walk":{"id":"chandra-walk","name":"Candra Walk","name_sanskrit":"चन्द्र यात्रा","type":"graha","description":"Manas-control + BG 6.5-7.","step_count":5,"url":"/walk/chandra-walk"},"reason":"Somavāra (Monday) — 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 September 1, 1980 CE · Perth, Australia · Vidhyamitra","description":"September 1, 1980 CE for Perth, Australia: Kṛṣṇa Saptamī, sūryodaya 06:33, sūryāsta 17:59.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1980-09-01","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1980-09-01","sa":"https://sa.vidhyamitra.com/city/perth/1980-09-01","hi":"https://hi.vidhyamitra.com/city/perth/1980-09-01","x-default":"https://vidhyamitra.com/city/perth/1980-09-01"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T00:00:52.217Z","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":"2026-06-01T00:00:52.217Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T00:00:52.217Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}