{"id":"vidhyamitra:city-day:perth:1980-07-11:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1980-07-11","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1980-07-11","date_display":"July 11, 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":7,"day":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444431.770833,"kali_year":5082,"ahargana":1855966.2708,"sun":{"sidereal_longitude":84.9554,"rashi":3,"rashi_name":"Mithuna"},"moon":{"sidereal_longitude":71.0044,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":29,"name":"Caturdaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturdaśī","elongation_degrees":346.049,"elapsed_within_tithi_degrees":10.049},"nakshatra":{"number":6,"name":"Ārdrā","pada":2,"moon_longitude":71.0044,"elapsed_within_degrees":4.3377},"yoga":{"number":12,"name":"Dhruva","sum_longitude":155.9597},"karana":{"half_tithi_index":57,"name":"Śakuni"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"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":7,"day":11,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444431.770833,"ahargana":1855966.2708,"kali_year":5082,"ayanamsa_lahiri":23.5809,"grahas":{"sun":{"sidereal_longitude":85.31408799999997,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":2},"retrograde":false},"moon":{"sidereal_longitude":69.931288,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":1},"retrograde":false,"latitude":-3.4943},"mars":{"sidereal_longitude":156.861988,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":86.67618800000002,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":3},"retrograde":true},"jupiter":{"sidereal_longitude":134.067588,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":false},"venus":{"sidereal_longitude":52.96448800000002,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":148.36958800000002,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":121.9754,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":301.9754,"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":7,"day":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444431.770833,"kali_year":5082,"ahargana":1855966.2708,"sun":{"sidereal_longitude":84.9554,"rashi":3,"rashi_name":"Mithuna"},"moon":{"sidereal_longitude":71.0044,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":29,"name":"Caturdaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturdaśī","elongation_degrees":346.049,"elapsed_within_tithi_degrees":10.049},"nakshatra":{"number":6,"name":"Ārdrā","pada":2,"moon_longitude":71.0044,"elapsed_within_degrees":4.3377},"yoga":{"number":12,"name":"Dhruva","sum_longitude":155.9597},"karana":{"half_tithi_index":57,"name":"Śakuni"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.494,"elongation":13.951},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.494,"opposition_distance":166.049}},"eclipse_window_40days":[{"offset_days":17,"type":"lunar","occurs":true,"moon_latitude":1.393,"opposition_distance":1.959}]},"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":"07:16","sunsetLocal":"17:27","solarNoonLocal":"12:22","dayLengthHours":10.189260621438684,"dayLengthDisplay":"10 Hours 11 Mins 21 Secs","nightLengthDisplay":"13 Hours 48 Mins 39 Secs","moonriseLocal":"06:20","moonsetLocal":"16:21","rahuKala":{"name":"Rāhu Kāla","start":"11:05","end":"12:22","startHours":11.087459268818375,"endHours":12.36111684649821,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"14:55","end":"16:11","startHours":14.908432001857882,"endHours":16.182089579537717,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"08:32","end":"09:49","startHours":8.540144113458704,"endHours":9.81380169113854,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:39","end":"09:59","startHours":9.643980680781228,"endHours":9.98362270149585,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:41","end":"07:58","startHours":7.6910390616721465,"endHours":7.962752678243845,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:01","end":"12:42","startHours":12.021474825783587,"endHours":12.700758867212832,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:54","end":"06:35","startHours":5.907918452920377,"endHours":6.587202494349622,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:25","end":"07:16","startHours":6.417381483992311,"endHours":7.266486535778868,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:04","end":"14:44","startHours":14.059326950071323,"endHours":14.738610991500568,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:15","end":"17:39","startHours":17.255747157217552,"endHours":17.65574715721755,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:27","end":"17:53","startHours":17.45574715721755,"endHours":17.88029968311083,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:12","end":"18:57","startHours":17.20574715721755,"endHours":18.95574715721755,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:01","end":"00:42","startHours":24.021474825783585,"endHours":24.700758867212834,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"07:16","end":"08:32","startHours":7.266486535778868,"endHours":8.540144113458704,"quality":"neutral"},{"name":"Labha","start":"08:32","end":"09:49","startHours":8.540144113458704,"endHours":9.81380169113854,"quality":"auspicious"},{"name":"Amṛta","start":"09:49","end":"11:05","startHours":9.81380169113854,"endHours":11.087459268818375,"quality":"auspicious"},{"name":"Kāla","start":"11:05","end":"12:22","startHours":11.087459268818375,"endHours":12.36111684649821,"quality":"inauspicious"},{"name":"Śubha","start":"12:22","end":"13:38","startHours":12.36111684649821,"endHours":13.634774424178046,"quality":"auspicious"},{"name":"Roga","start":"13:38","end":"14:55","startHours":13.634774424178046,"endHours":14.908432001857882,"quality":"inauspicious"},{"name":"Udveg","start":"14:55","end":"16:11","startHours":14.908432001857882,"endHours":16.182089579537717,"quality":"inauspicious"},{"name":"Chala","start":"16:11","end":"17:27","startHours":16.182089579537717,"endHours":17.45574715721755,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"17:27","end":"19:11","startHours":17.45574715721755,"endHours":19.182089579537717,"quality":"inauspicious"},{"name":"Udveg","start":"19:11","end":"20:55","startHours":19.182089579537717,"endHours":20.908432001857882,"quality":"inauspicious"},{"name":"Chala","start":"20:55","end":"22:38","startHours":20.908432001857882,"endHours":22.634774424178044,"quality":"neutral"},{"name":"Labha","start":"22:38","end":"00:22","startHours":22.634774424178044,"endHours":24.36111684649821,"quality":"auspicious"},{"name":"Amṛta","start":"00:22","end":"02:05","startHours":24.36111684649821,"endHours":26.087459268818375,"quality":"auspicious"},{"name":"Kāla","start":"02:05","end":"03:49","startHours":26.087459268818375,"endHours":27.813801691138536,"quality":"inauspicious"},{"name":"Śubha","start":"03:49","end":"05:32","startHours":27.813801691138536,"endHours":29.5401441134587,"quality":"auspicious"},{"name":"Roga","start":"05:32","end":"07:16","startHours":29.5401441134587,"endHours":31.266486535778867,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:16","end":"08:16","startHours":7.266486535778868,"endHours":8.266486535778867,"planetary_lord":"Venus"},{"name":"Hora 2","start":"08:16","end":"09:16","startHours":8.266486535778867,"endHours":9.266486535778867,"planetary_lord":"Sun"},{"name":"Hora 3","start":"09:16","end":"10:16","startHours":9.266486535778867,"endHours":10.266486535778867,"planetary_lord":"Mars"},{"name":"Hora 4","start":"10:16","end":"11:16","startHours":10.266486535778867,"endHours":11.266486535778867,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"11:16","end":"12:16","startHours":11.266486535778867,"endHours":12.266486535778867,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"12:16","end":"13:16","startHours":12.266486535778867,"endHours":13.266486535778867,"planetary_lord":"Moon"},{"name":"Hora 7","start":"13:16","end":"14:16","startHours":13.266486535778867,"endHours":14.266486535778867,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"14:16","end":"15:16","startHours":14.266486535778867,"endHours":15.266486535778867,"planetary_lord":"Venus"},{"name":"Hora 9","start":"15:16","end":"16:16","startHours":15.266486535778867,"endHours":16.266486535778867,"planetary_lord":"Sun"},{"name":"Hora 10","start":"16:16","end":"17:16","startHours":16.266486535778867,"endHours":17.266486535778867,"planetary_lord":"Mars"},{"name":"Hora 11","start":"17:16","end":"18:16","startHours":17.266486535778867,"endHours":18.266486535778867,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"18:16","end":"19:16","startHours":18.266486535778867,"endHours":19.266486535778867,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"19:16","end":"20:16","startHours":19.266486535778867,"endHours":20.266486535778867,"planetary_lord":"Moon"},{"name":"Hora 14","start":"20:16","end":"21:16","startHours":20.266486535778867,"endHours":21.266486535778867,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"21:16","end":"22:16","startHours":21.266486535778867,"endHours":22.266486535778867,"planetary_lord":"Venus"},{"name":"Hora 16","start":"22:16","end":"23:16","startHours":22.266486535778867,"endHours":23.266486535778867,"planetary_lord":"Sun"},{"name":"Hora 17","start":"23:16","end":"00:16","startHours":23.266486535778867,"endHours":24.266486535778867,"planetary_lord":"Mars"},{"name":"Hora 18","start":"00:16","end":"01:16","startHours":24.266486535778867,"endHours":25.266486535778867,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"01:16","end":"02:16","startHours":25.266486535778867,"endHours":26.266486535778867,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"02:16","end":"03:16","startHours":26.266486535778867,"endHours":27.266486535778867,"planetary_lord":"Moon"},{"name":"Hora 21","start":"03:16","end":"04:16","startHours":27.266486535778867,"endHours":28.266486535778867,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"04:16","end":"05:16","startHours":28.266486535778867,"endHours":29.266486535778867,"planetary_lord":"Venus"},{"name":"Hora 23","start":"05:16","end":"06:16","startHours":29.266486535778867,"endHours":30.266486535778867,"planetary_lord":"Sun"},{"name":"Hora 24","start":"06:16","end":"07:16","startHours":30.266486535778867,"endHours":31.266486535778867,"planetary_lord":"Mars"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Punarvasu","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Uttara Phalgunī","Hasta","Citrā","Svātī","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Mithuna","Siṃha","Vṛścika","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Karka","Kanyā","Tulā","Makara","Kumbha"]},"dishaShool":"West (Paścim)","chandraVasa":"South","rahuVasa":"South-East","anandadiYoga":{"name":"Cara","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":22.104691409023008,"eotMinutes":-5.10901078989257,"ayanamsa":23.5809}},"calendars":{"vikram_samvat":2037,"vikram_samvatsara":"Śrīmukha","saka_samvat":1902,"saka_samvatsara":"Raudra","bengali_samvat":1387,"malayalam_era":1156,"nanakshahi_year":511,"lunar_month":"Āṣāḍha","lunar_month_paksha_full":"Āṣāḍha Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Āṣāḍha","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":"Āṣāḍha Kṛṣṇa Caturdaśī · Vikram 2037 Śrīmukha · Śaka 1902 Raudra"},"festivals":[{"id":"masika-shivaratri","name":"Māsika Śivarātri","name_sanskrit":"मासिक शिवरात्रि","tradition":"Shaiva","associated_deity":"Śiva","significance":"Monthly Śiva observance.","vrata":true,"detection":{"tithi_number":29,"tithi_paksha":"Kṛṣṇa"},"precedence":6}],"todays_walk":{"walk":{"id":"shukra-walk","name":"Śukra Walk","name_sanskrit":"शुक्र यात्रा","type":"graha","description":"Beauty + creativity in dharma + BG 10.36.","step_count":5,"url":"/walk/shukra-walk"},"reason":"Śukravāra (Friday) — 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 July 11, 1980 CE · Perth, Australia · Vidhyamitra","description":"July 11, 1980 CE for Perth, Australia: Kṛṣṇa Caturdaśī, sūryodaya 07:16, sūryāsta 17:27.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1980-07-11","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1980-07-11","sa":"https://sa.vidhyamitra.com/city/perth/1980-07-11","hi":"https://hi.vidhyamitra.com/city/perth/1980-07-11","x-default":"https://vidhyamitra.com/city/perth/1980-07-11"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T12:48:05.777Z","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":"2026-06-02T12:48:05.777Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T12:48:05.777Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}