{"id":"vidhyamitra:city-day:perth:1971-05-16:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1971-05-16","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1971-05-16","date_display":"May 16, 1971 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":1971,"month":5,"day":16,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441087.770833,"kali_year":5073,"ahargana":1852622.2708,"sun":{"sidereal_longitude":31.1292,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":279.8399,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":21,"name":"Ṣaṣṭhī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Ṣaṣṭhī","elongation_degrees":248.7107,"elapsed_within_tithi_degrees":8.7107},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4,"moon_longitude":279.8399,"elapsed_within_degrees":13.1732},"yoga":{"number":24,"name":"Śukla","sum_longitude":310.9691},"karana":{"half_tithi_index":41,"name":"Vaṇija"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"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":1971,"month":5,"day":16,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2441087.770833,"ahargana":1852622.2708,"kali_year":5073,"ayanamsa_lahiri":23.4531,"grahas":{"sun":{"sidereal_longitude":31.083753,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":278.025353,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false,"latitude":-1.4872},"mars":{"sidereal_longitude":282.960953,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":5.8033530000000155,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":219.79055300000005,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":2},"retrograde":true},"venus":{"sidereal_longitude":3.953253000000018,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":32.66885300000001,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":299.1566,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":119.1566,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":4},"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":1971,"month":5,"day":16,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441087.770833,"kali_year":5073,"ahargana":1852622.2708,"sun":{"sidereal_longitude":31.1292,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":279.8399,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":21,"name":"Ṣaṣṭhī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Ṣaṣṭhī","elongation_degrees":248.7107,"elapsed_within_tithi_degrees":8.7107},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4,"moon_longitude":279.8399,"elapsed_within_degrees":13.1732},"yoga":{"number":24,"name":"Śukla","sum_longitude":310.9691},"karana":{"half_tithi_index":41,"name":"Vaṇija"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-1.487,"elongation":111.289},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-1.487,"opposition_distance":68.711}},"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":"06:58","sunsetLocal":"17:28","solarNoonLocal":"12:13","dayLengthHours":10.497259191162087,"dayLengthDisplay":"10 Hours 29 Mins 50 Secs","nightLengthDisplay":"13 Hours 30 Mins 10 Secs","moonriseLocal":"21:46","moonsetLocal":"11:36","rahuKala":{"name":"Rāhu Kāla","start":"16:09","end":"17:28","startHours":16.15005128070599,"endHours":17.46220867960125,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:13","end":"13:32","startHours":12.213579084020207,"endHours":13.52573648291547,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:50","end":"16:09","startHours":14.837893881810729,"endHours":16.15005128070599,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:25","end":"09:46","startHours":9.414309966376985,"endHours":9.764218606082387,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:24","end":"07:41","startHours":7.402335288070918,"endHours":7.6822621998352405,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:52","end":"12:34","startHours":11.863670444314804,"endHours":12.56348772372561,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:34","end":"06:16","startHours":5.5653149296175535,"endHours":6.2651322090283585,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:05","end":"06:58","startHours":6.090177889175657,"endHours":6.9649494884391645,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:58","end":"14:40","startHours":13.963122282547221,"endHours":14.662939561958027,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:16","end":"17:40","startHours":17.26220867960125,"endHours":17.66220867960125,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:28","end":"17:54","startHours":17.46220867960125,"endHours":17.899594479233002,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:13","end":"18:58","startHours":17.21220867960125,"endHours":18.96220867960125,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:52","end":"00:34","startHours":23.863670444314803,"endHours":24.56348772372561,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:58","end":"08:17","startHours":6.9649494884391645,"endHours":8.277106887334426,"quality":"inauspicious"},{"name":"Chala","start":"08:17","end":"09:35","startHours":8.277106887334426,"endHours":9.589264286229685,"quality":"neutral"},{"name":"Labha","start":"09:35","end":"10:54","startHours":9.589264286229685,"endHours":10.901421685124948,"quality":"auspicious"},{"name":"Amṛta","start":"10:54","end":"12:13","startHours":10.901421685124948,"endHours":12.213579084020207,"quality":"auspicious"},{"name":"Kāla","start":"12:13","end":"13:32","startHours":12.213579084020207,"endHours":13.52573648291547,"quality":"inauspicious"},{"name":"Śubha","start":"13:32","end":"14:50","startHours":13.52573648291547,"endHours":14.837893881810729,"quality":"auspicious"},{"name":"Roga","start":"14:50","end":"16:09","startHours":14.837893881810729,"endHours":16.15005128070599,"quality":"inauspicious"},{"name":"Udveg","start":"16:09","end":"17:28","startHours":16.15005128070599,"endHours":17.46220867960125,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"17:28","end":"19:09","startHours":17.46220867960125,"endHours":19.150051280705988,"quality":"auspicious"},{"name":"Roga","start":"19:09","end":"20:50","startHours":19.150051280705988,"endHours":20.83789388181073,"quality":"inauspicious"},{"name":"Udveg","start":"20:50","end":"22:32","startHours":20.83789388181073,"endHours":22.52573648291547,"quality":"inauspicious"},{"name":"Chala","start":"22:32","end":"00:13","startHours":22.52573648291547,"endHours":24.213579084020207,"quality":"neutral"},{"name":"Labha","start":"00:13","end":"01:54","startHours":24.213579084020207,"endHours":25.901421685124944,"quality":"auspicious"},{"name":"Amṛta","start":"01:54","end":"03:35","startHours":25.901421685124944,"endHours":27.589264286229685,"quality":"auspicious"},{"name":"Kāla","start":"03:35","end":"05:17","startHours":27.589264286229685,"endHours":29.277106887334426,"quality":"inauspicious"},{"name":"Śubha","start":"05:17","end":"06:58","startHours":29.277106887334426,"endHours":30.964949488439164,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:58","end":"07:58","startHours":6.9649494884391645,"endHours":7.9649494884391645,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:58","end":"08:58","startHours":7.9649494884391645,"endHours":8.964949488439164,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:58","end":"09:58","startHours":8.964949488439164,"endHours":9.964949488439164,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:58","end":"10:58","startHours":9.964949488439164,"endHours":10.964949488439164,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:58","end":"11:58","startHours":10.964949488439164,"endHours":11.964949488439164,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:58","end":"12:58","startHours":11.964949488439164,"endHours":12.964949488439164,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:58","end":"13:58","startHours":12.964949488439164,"endHours":13.964949488439164,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:58","end":"14:58","startHours":13.964949488439164,"endHours":14.964949488439164,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:58","end":"15:58","startHours":14.964949488439164,"endHours":15.964949488439164,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:58","end":"16:58","startHours":15.964949488439164,"endHours":16.964949488439164,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:58","end":"17:58","startHours":16.964949488439164,"endHours":17.964949488439164,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:58","end":"18:58","startHours":17.964949488439164,"endHours":18.964949488439164,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:58","end":"19:58","startHours":18.964949488439164,"endHours":19.964949488439164,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:58","end":"20:58","startHours":19.964949488439164,"endHours":20.964949488439164,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:58","end":"21:58","startHours":20.964949488439164,"endHours":21.964949488439164,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:58","end":"22:58","startHours":21.964949488439164,"endHours":22.964949488439164,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:58","end":"23:58","startHours":22.964949488439164,"endHours":23.964949488439164,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:58","end":"00:58","startHours":23.964949488439164,"endHours":24.964949488439164,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:58","end":"01:58","startHours":24.964949488439164,"endHours":25.964949488439164,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:58","end":"02:58","startHours":25.964949488439164,"endHours":26.964949488439164,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:58","end":"03:58","startHours":26.964949488439164,"endHours":27.964949488439164,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:58","end":"04:58","startHours":27.964949488439164,"endHours":28.964949488439164,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:58","end":"05:58","startHours":28.964949488439164,"endHours":29.964949488439164,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:58","end":"06:58","startHours":29.964949488439164,"endHours":30.964949488439164,"planetary_lord":"Jupiter"}],"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":["Mithuna","Karka","Tulā","Vṛścika","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Dhanu","Kumbha"]},"dishaShool":"West (Paścim)","chandraVasa":"South-East","rahuVasa":"North-East","anandadiYoga":{"name":"Amṛta","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":18.901892014487245,"eotMinutes":3.743254958787478,"ayanamsa":23.4531}},"calendars":{"vikram_samvat":2028,"vikram_samvatsara":"Raktākṣī","saka_samvat":1893,"saka_samvatsara":"Virodhakṛt","bengali_samvat":1378,"malayalam_era":1147,"nanakshahi_year":502,"lunar_month":"Jyeṣṭha","lunar_month_paksha_full":"Jyeṣṭha Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Jyeṣṭha","lunar_month_amanta":"Vaiśākha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Vṛṣabha (Vaikāsi)","ritu":"Grīṣma (Summer)","display_summary":"Jyeṣṭha Kṛṣṇa Ṣaṣṭhī · Vikram 2028 Raktākṣī · Śaka 1893 Virodhakṛt"},"festivals":[],"todays_walk":{"walk":{"id":"surya-walk","name":"Sūrya Walk","name_sanskrit":"सूर्य यात्रा","type":"graha","description":"Self-illumination + BG 4.1 (Sun-lineage of Gītā transmission).","step_count":6,"url":"/walk/surya-walk"},"reason":"Ravivāra (Sunday) — 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 May 16, 1971 CE · Perth, Australia · Vidhyamitra","description":"May 16, 1971 CE for Perth, Australia: Kṛṣṇa Ṣaṣṭhī, sūryodaya 06:58, sūryāsta 17:28.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1971-05-16","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1971-05-16","sa":"https://sa.vidhyamitra.com/city/perth/1971-05-16","hi":"https://hi.vidhyamitra.com/city/perth/1971-05-16","x-default":"https://vidhyamitra.com/city/perth/1971-05-16"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T11:17:51.736Z","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":"2026-06-02T11:17:51.736Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T11:17:51.736Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}