{"id":"vidhyamitra:city-day:perth:1980-08-28:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1980-08-28","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1980-08-28","date_display":"August 28, 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":8,"day":28,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444479.770833,"kali_year":5082,"ahargana":1856014.2708,"sun":{"sidereal_longitude":130.6827,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":334.7463,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":18,"name":"Tṛtīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Tṛtīyā","elongation_degrees":204.0636,"elapsed_within_tithi_degrees":0.0636},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1,"moon_longitude":334.7463,"elapsed_within_degrees":1.4129},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":105.4289},"karana":{"half_tithi_index":34,"name":"Vaṇija"},"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":1980,"month":8,"day":28,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444479.770833,"ahargana":1856014.2708,"kali_year":5082,"ayanamsa_lahiri":23.5828,"grahas":{"sun":{"sidereal_longitude":131.30875400000002,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":337.504054,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2},"retrograde":false,"latitude":-2.5995},"mars":{"sidereal_longitude":185.93915400000003,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":133.094654,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":143.61195399999997,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":4},"retrograde":false},"venus":{"sidereal_longitude":85.73945400000002,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":153.17645399999992,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":119.4322,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":299.4322,"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":8,"day":28,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444479.770833,"kali_year":5082,"ahargana":1856014.2708,"sun":{"sidereal_longitude":130.6827,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":334.7463,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":18,"name":"Tṛtīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Tṛtīyā","elongation_degrees":204.0636,"elapsed_within_tithi_degrees":0.0636},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1,"moon_longitude":334.7463,"elapsed_within_degrees":1.4129},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":105.4289},"karana":{"half_tithi_index":34,"name":"Vaṇija"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.599,"elongation":155.936},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.599,"opposition_distance":24.064}},"eclipse_window_40days":[{"offset_days":-2,"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":"06:38","sunsetLocal":"17:57","solarNoonLocal":"12:17","dayLengthHours":11.316075771718168,"dayLengthDisplay":"11 Hours 18 Mins 58 Secs","nightLengthDisplay":"12 Hours 41 Mins 02 Secs","moonriseLocal":"20:00","moonsetLocal":"08:04","rahuKala":{"name":"Rāhu Kāla","start":"13:42","end":"15:07","startHours":13.703984950147841,"endHours":15.118494421612612,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"06:38","end":"08:03","startHours":6.6314375928239855,"endHours":8.045947064288757,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"09:28","end":"10:52","startHours":9.460456535753528,"endHours":10.874966007218298,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:16","end":"09:39","startHours":9.271855272891557,"endHours":9.649057798615496,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:06","end":"07:24","startHours":7.1029407499789095,"endHours":7.40470277055806,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:55","end":"12:40","startHours":11.91227295295913,"endHours":12.666678004407009,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:07","end":"05:53","startHours":5.12262748992823,"endHours":5.877032541376107,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:41","end":"06:38","startHours":5.688431278514138,"endHours":6.6314375928239855,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:11","end":"14:56","startHours":14.175488107302764,"endHours":14.929893158750641,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:45","end":"18:09","startHours":17.747513364542154,"endHours":18.147513364542153,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:57","end":"18:25","startHours":17.947513364542154,"endHours":18.419016521697078,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:42","end":"19:27","startHours":17.697513364542154,"endHours":19.447513364542154,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:55","end":"00:40","startHours":23.912272952959132,"endHours":24.666678004407007,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"06:38","end":"08:03","startHours":6.6314375928239855,"endHours":8.045947064288757,"quality":"auspicious"},{"name":"Roga","start":"08:03","end":"09:28","startHours":8.045947064288757,"endHours":9.460456535753528,"quality":"inauspicious"},{"name":"Udveg","start":"09:28","end":"10:52","startHours":9.460456535753528,"endHours":10.874966007218298,"quality":"inauspicious"},{"name":"Chala","start":"10:52","end":"12:17","startHours":10.874966007218298,"endHours":12.28947547868307,"quality":"neutral"},{"name":"Labha","start":"12:17","end":"13:42","startHours":12.28947547868307,"endHours":13.703984950147841,"quality":"auspicious"},{"name":"Amṛta","start":"13:42","end":"15:07","startHours":13.703984950147841,"endHours":15.118494421612612,"quality":"auspicious"},{"name":"Kāla","start":"15:07","end":"16:32","startHours":15.118494421612612,"endHours":16.53300389307738,"quality":"inauspicious"},{"name":"Śubha","start":"16:32","end":"17:57","startHours":16.53300389307738,"endHours":17.947513364542154,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"17:57","end":"19:32","startHours":17.947513364542154,"endHours":19.53300389307738,"quality":"auspicious"},{"name":"Kāla","start":"19:32","end":"21:07","startHours":19.53300389307738,"endHours":21.11849442161261,"quality":"inauspicious"},{"name":"Śubha","start":"21:07","end":"22:42","startHours":21.11849442161261,"endHours":22.70398495014784,"quality":"auspicious"},{"name":"Roga","start":"22:42","end":"00:17","startHours":22.70398495014784,"endHours":24.28947547868307,"quality":"inauspicious"},{"name":"Udveg","start":"00:17","end":"01:52","startHours":24.28947547868307,"endHours":25.874966007218298,"quality":"inauspicious"},{"name":"Chala","start":"01:52","end":"03:28","startHours":25.874966007218298,"endHours":27.46045653575353,"quality":"neutral"},{"name":"Labha","start":"03:28","end":"05:03","startHours":27.46045653575353,"endHours":29.045947064288757,"quality":"auspicious"},{"name":"Amṛta","start":"05:03","end":"06:38","startHours":29.045947064288757,"endHours":30.631437592823985,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:38","end":"07:38","startHours":6.6314375928239855,"endHours":7.6314375928239855,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"07:38","end":"08:38","startHours":7.6314375928239855,"endHours":8.631437592823985,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"08:38","end":"09:38","startHours":8.631437592823985,"endHours":9.631437592823985,"planetary_lord":"Moon"},{"name":"Hora 4","start":"09:38","end":"10:38","startHours":9.631437592823985,"endHours":10.631437592823985,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"10:38","end":"11:38","startHours":10.631437592823985,"endHours":11.631437592823985,"planetary_lord":"Venus"},{"name":"Hora 6","start":"11:38","end":"12:38","startHours":11.631437592823985,"endHours":12.631437592823985,"planetary_lord":"Sun"},{"name":"Hora 7","start":"12:38","end":"13:38","startHours":12.631437592823985,"endHours":13.631437592823985,"planetary_lord":"Mars"},{"name":"Hora 8","start":"13:38","end":"14:38","startHours":13.631437592823985,"endHours":14.631437592823985,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"14:38","end":"15:38","startHours":14.631437592823985,"endHours":15.631437592823985,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"15:38","end":"16:38","startHours":15.631437592823985,"endHours":16.631437592823985,"planetary_lord":"Moon"},{"name":"Hora 11","start":"16:38","end":"17:38","startHours":16.631437592823985,"endHours":17.631437592823985,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"17:38","end":"18:38","startHours":17.631437592823985,"endHours":18.631437592823985,"planetary_lord":"Venus"},{"name":"Hora 13","start":"18:38","end":"19:38","startHours":18.631437592823985,"endHours":19.631437592823985,"planetary_lord":"Sun"},{"name":"Hora 14","start":"19:38","end":"20:38","startHours":19.631437592823985,"endHours":20.631437592823985,"planetary_lord":"Mars"},{"name":"Hora 15","start":"20:38","end":"21:38","startHours":20.631437592823985,"endHours":21.631437592823985,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"21:38","end":"22:38","startHours":21.631437592823985,"endHours":22.631437592823985,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"22:38","end":"23:38","startHours":22.631437592823985,"endHours":23.631437592823985,"planetary_lord":"Moon"},{"name":"Hora 18","start":"23:38","end":"00:38","startHours":23.631437592823985,"endHours":24.631437592823985,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"00:38","end":"01:38","startHours":24.631437592823985,"endHours":25.631437592823985,"planetary_lord":"Venus"},{"name":"Hora 20","start":"01:38","end":"02:38","startHours":25.631437592823985,"endHours":26.631437592823985,"planetary_lord":"Sun"},{"name":"Hora 21","start":"02:38","end":"03:38","startHours":26.631437592823985,"endHours":27.631437592823985,"planetary_lord":"Mars"},{"name":"Hora 22","start":"03:38","end":"04:38","startHours":27.631437592823985,"endHours":28.631437592823985,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"04:38","end":"05:38","startHours":28.631437592823985,"endHours":29.631437592823985,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"05:38","end":"06:38","startHours":29.631437592823985,"endHours":30.631437592823985,"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"},"tropicalRitu":"Varṣā (Monsoon) (tropical)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":9.716368467340184,"eotMinutes":-0.8105287209842176,"ayanamsa":23.5828}},"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 Tṛtīyā · Vikram 2037 Śrīmukha · Śaka 1902 Raudra"},"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 August 28, 1980 CE · Perth, Australia · Vidhyamitra","description":"August 28, 1980 CE for Perth, Australia: Kṛṣṇa Tṛtīyā, sūryodaya 06:38, sūryāsta 17:57.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1980-08-28","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1980-08-28","sa":"https://sa.vidhyamitra.com/city/perth/1980-08-28","hi":"https://hi.vidhyamitra.com/city/perth/1980-08-28","x-default":"https://vidhyamitra.com/city/perth/1980-08-28"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T02:42:15.668Z","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":"2026-06-01T02:42:15.668Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T02:42:15.668Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}