{"id":"vidhyamitra:city-day:perth:1978-10-16:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1978-10-16","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1978-10-16","date_display":"October 16, 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":10,"day":16,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2443797.770833,"kali_year":5080,"ahargana":1855332.2708,"sun":{"sidereal_longitude":178.0855,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":357.285,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":15,"name":"Pūrṇimā","paksha":"Śukla","full_name":"Śukla Pūrṇimā","elongation_degrees":179.1995,"elapsed_within_tithi_degrees":11.1995},"nakshatra":{"number":27,"name":"Revatī","pada":4,"moon_longitude":357.285,"elapsed_within_degrees":10.6184},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":175.3705},"karana":{"half_tithi_index":29,"name":"Bava"},"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":1978,"month":10,"day":16,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2443797.770833,"ahargana":1855332.2708,"kali_year":5080,"ayanamsa_lahiri":23.5567,"grahas":{"sun":{"sidereal_longitude":178.76681099999996,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":356.100911,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":3},"retrograde":false,"latitude":-1.6636},"mars":{"sidereal_longitude":204.64601100000004,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":189.51501099999996,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":102.642311,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"venus":{"sidereal_longitude":209.58211099999994,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":3},"retrograde":true},"saturn":{"sidereal_longitude":136.17551100000003,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":155.5678,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":335.5678,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1},"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":10,"day":16,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2443797.770833,"kali_year":5080,"ahargana":1855332.2708,"sun":{"sidereal_longitude":178.0855,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":357.285,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":15,"name":"Pūrṇimā","paksha":"Śukla","full_name":"Śukla Pūrṇimā","elongation_degrees":179.1995,"elapsed_within_tithi_degrees":11.1995},"nakshatra":{"number":27,"name":"Revatī","pada":4,"moon_longitude":357.285,"elapsed_within_degrees":10.6184},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":175.3705},"karana":{"half_tithi_index":29,"name":"Bava"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-1.664,"elongation":179.2},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-1.664,"opposition_distance":0.8}},"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":"05:36","sunsetLocal":"18:27","solarNoonLocal":"12:02","dayLengthHours":12.862383616237366,"dayLengthDisplay":"12 Hours 51 Mins 45 Secs","nightLengthDisplay":"11 Hours 08 Mins 15 Secs","moonriseLocal":"18:07","moonsetLocal":"05:34","rahuKala":{"name":"Rāhu Kāla","start":"07:12","end":"08:49","startHours":7.201777317724637,"endHours":8.809575269754308,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:25","end":"12:02","startHours":10.41737322178398,"endHours":12.02517117381365,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:38","end":"15:14","startHours":13.63296912584332,"endHours":15.240767077872992,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:36","end":"09:01","startHours":8.595202209483684,"endHours":9.02394833002493,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:08","end":"06:28","startHours":6.129912016371523,"endHours":6.472908912804519,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:36","end":"12:27","startHours":11.596425053272405,"endHours":12.453917294354895,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:53","end":"04:44","startHours":3.878994883529984,"endHours":4.7364871246124745,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:31","end":"05:36","startHours":4.522114064341852,"endHours":5.593979365694966,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:10","end":"15:02","startHours":14.168901776519878,"endHours":15.02639401760237,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:15","end":"18:39","startHours":18.256362981932334,"endHours":18.656362981932332,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:27","end":"19:00","startHours":18.456362981932333,"endHours":18.99229563260889,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:12","end":"19:57","startHours":18.206362981932333,"endHours":19.956362981932333,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:36","end":"00:27","startHours":23.596425053272405,"endHours":24.453917294354895,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"05:36","end":"07:12","startHours":5.593979365694966,"endHours":7.201777317724637,"quality":"auspicious"},{"name":"Kāla","start":"07:12","end":"08:49","startHours":7.201777317724637,"endHours":8.809575269754308,"quality":"inauspicious"},{"name":"Śubha","start":"08:49","end":"10:25","startHours":8.809575269754308,"endHours":10.41737322178398,"quality":"auspicious"},{"name":"Roga","start":"10:25","end":"12:02","startHours":10.41737322178398,"endHours":12.02517117381365,"quality":"inauspicious"},{"name":"Udveg","start":"12:02","end":"13:38","startHours":12.02517117381365,"endHours":13.63296912584332,"quality":"inauspicious"},{"name":"Chala","start":"13:38","end":"15:14","startHours":13.63296912584332,"endHours":15.240767077872992,"quality":"neutral"},{"name":"Labha","start":"15:14","end":"16:51","startHours":15.240767077872992,"endHours":16.848565029902662,"quality":"auspicious"},{"name":"Amṛta","start":"16:51","end":"18:27","startHours":16.848565029902662,"endHours":18.456362981932333,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"18:27","end":"19:51","startHours":18.456362981932333,"endHours":19.848565029902662,"quality":"neutral"},{"name":"Labha","start":"19:51","end":"21:14","startHours":19.848565029902662,"endHours":21.24076707787299,"quality":"auspicious"},{"name":"Amṛta","start":"21:14","end":"22:38","startHours":21.24076707787299,"endHours":22.63296912584332,"quality":"auspicious"},{"name":"Kāla","start":"22:38","end":"00:02","startHours":22.63296912584332,"endHours":24.02517117381365,"quality":"inauspicious"},{"name":"Śubha","start":"00:02","end":"01:25","startHours":24.02517117381365,"endHours":25.41737322178398,"quality":"auspicious"},{"name":"Roga","start":"01:25","end":"02:49","startHours":25.41737322178398,"endHours":26.80957526975431,"quality":"inauspicious"},{"name":"Udveg","start":"02:49","end":"04:12","startHours":26.80957526975431,"endHours":28.201777317724638,"quality":"inauspicious"},{"name":"Chala","start":"04:12","end":"05:36","startHours":28.201777317724638,"endHours":29.593979365694967,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"05:36","end":"06:36","startHours":5.593979365694966,"endHours":6.593979365694966,"planetary_lord":"Moon"},{"name":"Hora 2","start":"06:36","end":"07:36","startHours":6.593979365694966,"endHours":7.593979365694966,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"07:36","end":"08:36","startHours":7.593979365694966,"endHours":8.593979365694967,"planetary_lord":"Venus"},{"name":"Hora 4","start":"08:36","end":"09:36","startHours":8.593979365694967,"endHours":9.593979365694967,"planetary_lord":"Sun"},{"name":"Hora 5","start":"09:36","end":"10:36","startHours":9.593979365694967,"endHours":10.593979365694967,"planetary_lord":"Mars"},{"name":"Hora 6","start":"10:36","end":"11:36","startHours":10.593979365694967,"endHours":11.593979365694967,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"11:36","end":"12:36","startHours":11.593979365694967,"endHours":12.593979365694967,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"12:36","end":"13:36","startHours":12.593979365694967,"endHours":13.593979365694967,"planetary_lord":"Moon"},{"name":"Hora 9","start":"13:36","end":"14:36","startHours":13.593979365694967,"endHours":14.593979365694967,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"14:36","end":"15:36","startHours":14.593979365694967,"endHours":15.593979365694967,"planetary_lord":"Venus"},{"name":"Hora 11","start":"15:36","end":"16:36","startHours":15.593979365694967,"endHours":16.593979365694967,"planetary_lord":"Sun"},{"name":"Hora 12","start":"16:36","end":"17:36","startHours":16.593979365694967,"endHours":17.593979365694967,"planetary_lord":"Mars"},{"name":"Hora 13","start":"17:36","end":"18:36","startHours":17.593979365694967,"endHours":18.593979365694967,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"18:36","end":"19:36","startHours":18.593979365694967,"endHours":19.593979365694967,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"19:36","end":"20:36","startHours":19.593979365694967,"endHours":20.593979365694967,"planetary_lord":"Moon"},{"name":"Hora 16","start":"20:36","end":"21:36","startHours":20.593979365694967,"endHours":21.593979365694967,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"21:36","end":"22:36","startHours":21.593979365694967,"endHours":22.593979365694967,"planetary_lord":"Venus"},{"name":"Hora 18","start":"22:36","end":"23:36","startHours":22.593979365694967,"endHours":23.593979365694967,"planetary_lord":"Sun"},{"name":"Hora 19","start":"23:36","end":"00:36","startHours":23.593979365694967,"endHours":24.593979365694967,"planetary_lord":"Mars"},{"name":"Hora 20","start":"00:36","end":"01:36","startHours":24.593979365694967,"endHours":25.593979365694967,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"01:36","end":"02:36","startHours":25.593979365694967,"endHours":26.593979365694967,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"02:36","end":"03:36","startHours":26.593979365694967,"endHours":27.593979365694967,"planetary_lord":"Moon"},{"name":"Hora 23","start":"03:36","end":"04:36","startHours":27.593979365694967,"endHours":28.593979365694967,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"04:36","end":"05:36","startHours":28.593979365694967,"endHours":29.593979365694967,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"unfavorable_nakshatras":["Ārdrā","Punarvasu","Puṣya","Aśleṣā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"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":"East (Pūrva)","chandraVasa":"South-West","rahuVasa":"North-East","anandadiYoga":{"name":"Dhūmra","quality":"Inauspicious"},"tropicalRitu":"Śarad (Autumn) (tropical)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-8.689114775561453,"eotMinutes":15.04772957118102,"ayanamsa":23.5567}},"calendars":{"vikram_samvat":2035,"vikram_samvatsara":"Prajāpati","saka_samvat":1900,"saka_samvatsara":"Kālayukta","bengali_samvat":1385,"malayalam_era":1154,"nanakshahi_year":509,"lunar_month":"Āśvina","lunar_month_paksha_full":"Āśvina Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Āśvina","lunar_month_amanta":"Āśvina","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Kanyā (Puraṭṭāsi)","ritu":"Śarad (Autumn)","display_summary":"Āśvina Śukla Pūrṇimā · Vikram 2035 Prajāpati · Śaka 1900 Kālayukta"},"festivals":[{"id":"sharad-purnima","name":"Śarad Pūrṇimā / Kojāgarī Pūrṇimā","name_sanskrit":"शरद पूर्णिमा","tradition":"Vaishnava","associated_deity":"Krishna + Lakṣmī","significance":"Krishna's Mahā-rāsa with the gopīs at Vṛndāvana. Lakṣmī wakes (\"ko jāgartti?\")","vrata":true,"primary_observance":"Night-long jāgaraṇa; offering of pāyasa under moonlight","detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Āśvina"},"precedence":2,"sources":["Bhāgavata 10.29-33"]},{"id":"rasa-purnima","name":"Rāsa Pūrṇimā (Vraja Mahā-Rāsa)","name_sanskrit":"रास पूर्णिमा","tradition":"Vaishnava","associated_deity":"Krishna + Gopīs","significance":"Krishna's Mahā-rāsa with the gopīs at Vraja (Bhāgavata 10.29-33). Same as Śarad Pūrṇimā but emphasized in Vraja tradition.","vrata":false,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Āśvina"},"precedence":2},{"id":"valmiki-jayanti","name":"Mahārṣi Vālmīki Jayantī","name_sanskrit":"महर्षि वाल्मीकि जयन्ती","tradition":"Pan-Hindu","associated_deity":"Maharṣi Vālmīki (ādi-kavi)","significance":"Composer of Vālmīki Rāmāyaṇa. Āśvina Pūrṇimā tradition.","vrata":false,"detection":{"tithi_number":15,"tithi_paksha":"Śukla","lunar_month":"Āśvina"},"precedence":3}],"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 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 October 16, 1978 CE · Perth, Australia · Vidhyamitra","description":"October 16, 1978 CE for Perth, Australia: Śukla Pūrṇimā, sūryodaya 05:36, sūryāsta 18:27.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1978-10-16","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1978-10-16","sa":"https://sa.vidhyamitra.com/city/perth/1978-10-16","hi":"https://hi.vidhyamitra.com/city/perth/1978-10-16","x-default":"https://vidhyamitra.com/city/perth/1978-10-16"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T00:39:12.488Z","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":"2026-05-31T00:39:12.488Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T00:39:12.488Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}