{"id":"vidhyamitra:city-day:perth:1980-06-28:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1980-06-28","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1980-06-28","date_display":"June 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":6,"day":28,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444418.770833,"kali_year":5082,"ahargana":1855953.2708,"sun":{"sidereal_longitude":72.6503,"rashi":3,"rashi_name":"Mithuna"},"moon":{"sidereal_longitude":247.5367,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":15,"name":"Pūrṇimā","paksha":"Śukla","full_name":"Śukla Pūrṇimā","elongation_degrees":174.8864,"elapsed_within_tithi_degrees":6.8864},"nakshatra":{"number":19,"name":"Mūla","pada":3,"moon_longitude":247.5367,"elapsed_within_degrees":7.5367},"yoga":{"number":25,"name":"Brahma","sum_longitude":320.187},"karana":{"half_tithi_index":29,"name":"Bava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"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":6,"day":28,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444418.770833,"ahargana":1855953.2708,"kali_year":5082,"ayanamsa_lahiri":23.5804,"grahas":{"sun":{"sidereal_longitude":72.92008499999997,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":248.683585,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false,"latitude":3.6907},"mars":{"sidereal_longitude":149.817385,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":91.89748500000002,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":7,"name":"Punarvasu","pada":4},"retrograde":true},"jupiter":{"sidereal_longitude":131.91418499999997,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":54.21778499999999,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":147.49208499999997,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":122.6642,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":302.6642,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","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":1980,"month":6,"day":28,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444418.770833,"kali_year":5082,"ahargana":1855953.2708,"sun":{"sidereal_longitude":72.6503,"rashi":3,"rashi_name":"Mithuna"},"moon":{"sidereal_longitude":247.5367,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":15,"name":"Pūrṇimā","paksha":"Śukla","full_name":"Śukla Pūrṇimā","elongation_degrees":174.8864,"elapsed_within_tithi_degrees":6.8864},"nakshatra":{"number":19,"name":"Mūla","pada":3,"moon_longitude":247.5367,"elapsed_within_degrees":7.5367},"yoga":{"number":25,"name":"Brahma","sum_longitude":320.187},"karana":{"half_tithi_index":29,"name":"Bava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.691,"elongation":174.886},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.691,"opposition_distance":5.114}},"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":"07:17","sunsetLocal":"17:22","solarNoonLocal":"12:19","dayLengthHours":10.072470367603337,"dayLengthDisplay":"10 Hours 04 Mins 21 Secs","nightLengthDisplay":"13 Hours 55 Mins 39 Secs","moonriseLocal":"16:57","moonsetLocal":"07:08","rahuKala":{"name":"Rāhu Kāla","start":"09:48","end":"11:04","startHours":9.806015986501217,"endHours":11.065074782451635,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:35","end":"14:51","startHours":13.583192374352468,"endHours":14.842251170302886,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:17","end":"08:33","startHours":7.287898394600383,"endHours":8.546957190550799,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:38","end":"09:58","startHours":9.638141480374495,"endHours":9.97389049262794,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:42","end":"07:59","startHours":7.707584659917188,"endHours":7.976183869719944,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:59","end":"12:40","startHours":11.988384566148607,"endHours":12.659882590655496,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:57","end":"06:37","startHours":5.944902345586605,"endHours":6.616400370093494,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:27","end":"07:17","startHours":6.448525863966771,"endHours":7.287898394600383,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:00","end":"14:40","startHours":14.002878639669273,"endHours":14.674376664176162,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:10","end":"17:34","startHours":17.16036876220372,"endHours":17.56036876220372,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:22","end":"17:47","startHours":17.36036876220372,"endHours":17.780055027520525,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:07","end":"18:52","startHours":17.11036876220372,"endHours":18.86036876220372,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:59","end":"00:40","startHours":23.988384566148607,"endHours":24.659882590655496,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"07:17","end":"08:33","startHours":7.287898394600383,"endHours":8.546957190550799,"quality":"inauspicious"},{"name":"Śubha","start":"08:33","end":"09:48","startHours":8.546957190550799,"endHours":9.806015986501217,"quality":"auspicious"},{"name":"Roga","start":"09:48","end":"11:04","startHours":9.806015986501217,"endHours":11.065074782451635,"quality":"inauspicious"},{"name":"Udveg","start":"11:04","end":"12:19","startHours":11.065074782451635,"endHours":12.324133578402051,"quality":"inauspicious"},{"name":"Chala","start":"12:19","end":"13:35","startHours":12.324133578402051,"endHours":13.583192374352468,"quality":"neutral"},{"name":"Labha","start":"13:35","end":"14:51","startHours":13.583192374352468,"endHours":14.842251170302886,"quality":"auspicious"},{"name":"Amṛta","start":"14:51","end":"16:06","startHours":14.842251170302886,"endHours":16.101309966253304,"quality":"auspicious"},{"name":"Kāla","start":"16:06","end":"17:22","startHours":16.101309966253304,"endHours":17.36036876220372,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"17:22","end":"19:06","startHours":17.36036876220372,"endHours":19.101309966253304,"quality":"auspicious"},{"name":"Amṛta","start":"19:06","end":"20:51","startHours":19.101309966253304,"endHours":20.842251170302887,"quality":"auspicious"},{"name":"Kāla","start":"20:51","end":"22:35","startHours":20.842251170302887,"endHours":22.583192374352468,"quality":"inauspicious"},{"name":"Śubha","start":"22:35","end":"00:19","startHours":22.583192374352468,"endHours":24.32413357840205,"quality":"auspicious"},{"name":"Roga","start":"00:19","end":"02:04","startHours":24.32413357840205,"endHours":26.065074782451635,"quality":"inauspicious"},{"name":"Udveg","start":"02:04","end":"03:48","startHours":26.065074782451635,"endHours":27.806015986501215,"quality":"inauspicious"},{"name":"Chala","start":"03:48","end":"05:33","startHours":27.806015986501215,"endHours":29.5469571905508,"quality":"neutral"},{"name":"Labha","start":"05:33","end":"07:17","startHours":29.5469571905508,"endHours":31.287898394600383,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:17","end":"08:17","startHours":7.287898394600383,"endHours":8.287898394600383,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"08:17","end":"09:17","startHours":8.287898394600383,"endHours":9.287898394600383,"planetary_lord":"Moon"},{"name":"Hora 3","start":"09:17","end":"10:17","startHours":9.287898394600383,"endHours":10.287898394600383,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"10:17","end":"11:17","startHours":10.287898394600383,"endHours":11.287898394600383,"planetary_lord":"Venus"},{"name":"Hora 5","start":"11:17","end":"12:17","startHours":11.287898394600383,"endHours":12.287898394600383,"planetary_lord":"Sun"},{"name":"Hora 6","start":"12:17","end":"13:17","startHours":12.287898394600383,"endHours":13.287898394600383,"planetary_lord":"Mars"},{"name":"Hora 7","start":"13:17","end":"14:17","startHours":13.287898394600383,"endHours":14.287898394600383,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"14:17","end":"15:17","startHours":14.287898394600383,"endHours":15.287898394600383,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"15:17","end":"16:17","startHours":15.287898394600383,"endHours":16.287898394600383,"planetary_lord":"Moon"},{"name":"Hora 10","start":"16:17","end":"17:17","startHours":16.287898394600383,"endHours":17.287898394600383,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"17:17","end":"18:17","startHours":17.287898394600383,"endHours":18.287898394600383,"planetary_lord":"Venus"},{"name":"Hora 12","start":"18:17","end":"19:17","startHours":18.287898394600383,"endHours":19.287898394600383,"planetary_lord":"Sun"},{"name":"Hora 13","start":"19:17","end":"20:17","startHours":19.287898394600383,"endHours":20.287898394600383,"planetary_lord":"Mars"},{"name":"Hora 14","start":"20:17","end":"21:17","startHours":20.287898394600383,"endHours":21.287898394600383,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"21:17","end":"22:17","startHours":21.287898394600383,"endHours":22.287898394600383,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"22:17","end":"23:17","startHours":22.287898394600383,"endHours":23.287898394600383,"planetary_lord":"Moon"},{"name":"Hora 17","start":"23:17","end":"00:17","startHours":23.287898394600383,"endHours":24.287898394600383,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"00:17","end":"01:17","startHours":24.287898394600383,"endHours":25.287898394600383,"planetary_lord":"Venus"},{"name":"Hora 19","start":"01:17","end":"02:17","startHours":25.287898394600383,"endHours":26.287898394600383,"planetary_lord":"Sun"},{"name":"Hora 20","start":"02:17","end":"03:17","startHours":26.287898394600383,"endHours":27.287898394600383,"planetary_lord":"Mars"},{"name":"Hora 21","start":"03:17","end":"04:17","startHours":27.287898394600383,"endHours":28.287898394600383,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"04:17","end":"05:17","startHours":28.287898394600383,"endHours":29.287898394600383,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"05:17","end":"06:17","startHours":29.287898394600383,"endHours":30.287898394600383,"planetary_lord":"Moon"},{"name":"Hora 24","start":"06:17","end":"07:17","startHours":30.287898394600383,"endHours":31.287898394600383,"planetary_lord":"Mercury"}],"taraBala":{"favorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Svātī","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"unfavorable_nakshatras":["Aśvinī","Punarvasu","Puṣya","Aśleṣā","Maghā","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Tulā","Dhanu","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Makara","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"East","rahuVasa":"East","anandadiYoga":{"name":"Lumba","quality":"Auspicious"},"tropicalRitu":"Grīṣma (Summer) (tropical)","vedicRitu":"Grīṣma (Summer)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":23.27691365563227,"eotMinutes":-2.890014704123143,"ayanamsa":23.5804}},"calendars":{"vikram_samvat":2037,"vikram_samvatsara":"Śrīmukha","saka_samvat":1902,"saka_samvatsara":"Raudra","bengali_samvat":1387,"malayalam_era":1156,"nanakshahi_year":511,"lunar_month":"Jyeṣṭha","lunar_month_paksha_full":"Jyeṣṭha Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Jyeṣṭha","lunar_month_amanta":"Jyeṣṭha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mithuna (Āni)","ritu":"Grīṣma (Summer)","display_summary":"Jyeṣṭha Śukla Pūrṇimā · Vikram 2037 Śrīmukha · Śaka 1902 Raudra"},"festivals":[{"id":"jyeshtha-purnima","name":"Jyeṣṭha Pūrṇimā (Vaṭa Sāvitrī)","name_sanskrit":"ज्येष्ठ पूर्णिमा","tradition":"Pan-Hindu","significance":"Vaṭa Sāvitrī Pūrṇimā in some traditions (others observe Amāvasyā).","vrata":true,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Jyeṣṭha"},"precedence":3}],"todays_walk":{"walk":{"id":"shani-walk","name":"Śani Walk","name_sanskrit":"शनि यात्रा","type":"graha","description":"Tapas + endurance + BG 17.14-19.","step_count":7,"url":"/walk/shani-walk"},"reason":"Śanivāra (Saturday) — 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 Śukla Pūrṇimā","url":"/day/-3137-10-04","relevance":0.5},{"historical_date":"-0562-04-11","event":"Bhagavān Buddha's birth at Lumbinī","chart_id":"buddha","shared_marker":"same Śukla Pūrṇimā","url":"/day/-0562-04-11","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 June 28, 1980 CE · Perth, Australia · Vidhyamitra","description":"June 28, 1980 CE for Perth, Australia: Śukla Pūrṇimā, sūryodaya 07:17, sūryāsta 17:22.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1980-06-28","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1980-06-28","sa":"https://sa.vidhyamitra.com/city/perth/1980-06-28","hi":"https://hi.vidhyamitra.com/city/perth/1980-06-28","x-default":"https://vidhyamitra.com/city/perth/1980-06-28"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T03:06:48.358Z","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":"2026-06-01T03:06:48.358Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T03:06:48.358Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}