{"id":"vidhyamitra:city-day:perth:2017-04-09:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2017-04-09","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2017-04-09","date_display":"April 9, 2017 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":2017,"month":4,"day":9,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2457852.770833,"kali_year":5118,"ahargana":1869387.2708,"sun":{"sidereal_longitude":355.4012,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":150.3181,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":154.9169,"elapsed_within_tithi_degrees":10.9169},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2,"moon_longitude":150.3181,"elapsed_within_degrees":3.6514},"yoga":{"number":11,"name":"Vṛddhi","sum_longitude":145.7192},"karana":{"half_tithi_index":25,"name":"Taitila"},"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":2017,"month":4,"day":9,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2457852.770833,"ahargana":1869387.2708,"kali_year":5118,"ayanamsa_lahiri":24.0942,"grahas":{"sun":{"sidereal_longitude":355.292707,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":3},"retrograde":false},"moon":{"sidereal_longitude":149.881707,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false,"latitude":1.4972},"mars":{"sidereal_longitude":27.02510699999999,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":10.670006999999998,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":173.56660699999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":true},"venus":{"sidereal_longitude":333.42850699999997,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":243.521207,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":130.8663,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":310.8663,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","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":2017,"month":4,"day":9,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2457852.770833,"kali_year":5118,"ahargana":1869387.2708,"sun":{"sidereal_longitude":355.4012,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":150.3181,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":154.9169,"elapsed_within_tithi_degrees":10.9169},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2,"moon_longitude":150.3181,"elapsed_within_degrees":3.6514},"yoga":{"number":11,"name":"Vṛddhi","sum_longitude":145.7192},"karana":{"half_tithi_index":25,"name":"Taitila"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.497,"elongation":154.917},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.497,"opposition_distance":25.083}},"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":"06:34","sunsetLocal":"18:03","solarNoonLocal":"12:18","dayLengthHours":11.49709720225555,"dayLengthDisplay":"11 Hours 29 Mins 50 Secs","nightLengthDisplay":"12 Hours 30 Mins 10 Secs","moonriseLocal":"16:40","moonsetLocal":"04:34","rahuKala":{"name":"Rāhu Kāla","start":"16:37","end":"18:03","startHours":16.61898288889992,"endHours":18.056120039181863,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:18","end":"13:45","startHours":12.30757143805409,"endHours":13.744708588336032,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:11","end":"16:37","startHours":15.181845738617977,"endHours":16.61898288889992,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:15","end":"09:37","startHours":9.241678850785943,"endHours":9.62491542419446,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:02","end":"07:21","startHours":7.038068553686962,"endHours":7.344657812413777,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:55","end":"12:41","startHours":11.92433486464557,"endHours":12.690808011462607,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:02","end":"05:48","startHours":5.026076543292241,"endHours":5.792549690109278,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:36","end":"06:34","startHours":5.600931403405019,"endHours":6.559022836926315,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:13","end":"14:59","startHours":14.22375430509668,"endHours":14.990227451913716,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:51","end":"18:15","startHours":17.856120039181864,"endHours":18.256120039181862,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:03","end":"18:32","startHours":18.056120039181863,"endHours":18.53516575594251,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:48","end":"19:33","startHours":17.806120039181863,"endHours":19.556120039181863,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:55","end":"00:41","startHours":23.924334864645573,"endHours":24.690808011462607,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:34","end":"08:00","startHours":6.559022836926315,"endHours":7.996159987208259,"quality":"inauspicious"},{"name":"Chala","start":"08:00","end":"09:26","startHours":7.996159987208259,"endHours":9.433297137490202,"quality":"neutral"},{"name":"Labha","start":"09:26","end":"10:52","startHours":9.433297137490202,"endHours":10.870434287772145,"quality":"auspicious"},{"name":"Amṛta","start":"10:52","end":"12:18","startHours":10.870434287772145,"endHours":12.30757143805409,"quality":"auspicious"},{"name":"Kāla","start":"12:18","end":"13:45","startHours":12.30757143805409,"endHours":13.744708588336032,"quality":"inauspicious"},{"name":"Śubha","start":"13:45","end":"15:11","startHours":13.744708588336032,"endHours":15.181845738617977,"quality":"auspicious"},{"name":"Roga","start":"15:11","end":"16:37","startHours":15.181845738617977,"endHours":16.61898288889992,"quality":"inauspicious"},{"name":"Udveg","start":"16:37","end":"18:03","startHours":16.61898288889992,"endHours":18.056120039181863,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:03","end":"19:37","startHours":18.056120039181863,"endHours":19.618982888899918,"quality":"auspicious"},{"name":"Roga","start":"19:37","end":"21:11","startHours":19.618982888899918,"endHours":21.181845738617977,"quality":"inauspicious"},{"name":"Udveg","start":"21:11","end":"22:45","startHours":21.181845738617977,"endHours":22.74470858833603,"quality":"inauspicious"},{"name":"Chala","start":"22:45","end":"00:18","startHours":22.74470858833603,"endHours":24.30757143805409,"quality":"neutral"},{"name":"Labha","start":"00:18","end":"01:52","startHours":24.30757143805409,"endHours":25.870434287772145,"quality":"auspicious"},{"name":"Amṛta","start":"01:52","end":"03:26","startHours":25.870434287772145,"endHours":27.4332971374902,"quality":"auspicious"},{"name":"Kāla","start":"03:26","end":"05:00","startHours":27.4332971374902,"endHours":28.99615998720826,"quality":"inauspicious"},{"name":"Śubha","start":"05:00","end":"06:34","startHours":28.99615998720826,"endHours":30.559022836926314,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:34","end":"07:34","startHours":6.559022836926315,"endHours":7.559022836926315,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:34","end":"08:34","startHours":7.559022836926315,"endHours":8.559022836926314,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:34","end":"09:34","startHours":8.559022836926314,"endHours":9.559022836926314,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:34","end":"10:34","startHours":9.559022836926314,"endHours":10.559022836926314,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:34","end":"11:34","startHours":10.559022836926314,"endHours":11.559022836926314,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:34","end":"12:34","startHours":11.559022836926314,"endHours":12.559022836926314,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:34","end":"13:34","startHours":12.559022836926314,"endHours":13.559022836926314,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:34","end":"14:34","startHours":13.559022836926314,"endHours":14.559022836926314,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:34","end":"15:34","startHours":14.559022836926314,"endHours":15.559022836926314,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:34","end":"16:34","startHours":15.559022836926314,"endHours":16.559022836926314,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:34","end":"17:34","startHours":16.559022836926314,"endHours":17.559022836926314,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:34","end":"18:34","startHours":17.559022836926314,"endHours":18.559022836926314,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:34","end":"19:34","startHours":18.559022836926314,"endHours":19.559022836926314,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:34","end":"20:34","startHours":19.559022836926314,"endHours":20.559022836926314,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:34","end":"21:34","startHours":20.559022836926314,"endHours":21.559022836926314,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:34","end":"22:34","startHours":21.559022836926314,"endHours":22.559022836926314,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:34","end":"23:34","startHours":22.559022836926314,"endHours":23.559022836926314,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:34","end":"00:34","startHours":23.559022836926314,"endHours":24.559022836926314,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:34","end":"01:34","startHours":24.559022836926314,"endHours":25.559022836926314,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:34","end":"02:34","startHours":25.559022836926314,"endHours":26.559022836926314,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:34","end":"03:34","startHours":26.559022836926314,"endHours":27.559022836926314,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:34","end":"04:34","startHours":27.559022836926314,"endHours":28.559022836926314,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:34","end":"05:34","startHours":28.559022836926314,"endHours":29.559022836926314,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:34","end":"06:34","startHours":29.559022836926314,"endHours":30.559022836926314,"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":["Vṛṣabha","Mithuna","Siṃha","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Kanyā","Vṛścika","Dhanu","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"West","rahuVasa":"North-East","anandadiYoga":{"name":"Maitra","quality":"Auspicious"},"drikRitu":"Vasanta (Spring) (Drik)","vedicRitu":"Śiśira (Winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":7.5866558501116925,"eotMinutes":-1.8962862832453116,"ayanamsa":24.0942}},"calendars":{"vikram_samvat":2074,"vikram_samvatsara":"Sādhāraṇa","saka_samvat":1939,"saka_samvatsara":"Hemalambī","bengali_samvat":1424,"malayalam_era":1193,"nanakshahi_year":548,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Śukla Pakṣa","solar_month":"Mīna (Paṅkuṇi)","ritu":"Vasanta (Spring)","display_summary":"Caitra Śukla Trayodaśī · Vikram 2074 Sādhāraṇa · Śaka 1939 Hemalambī"},"festivals":[{"id":"mina-sankranti","name":"Mīna Saṅkrānti","name_sanskrit":"मीन सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Pisces; Mīna-māsa begins.","vrata":false,"detection":{"sun_rashi":"Mīna"},"precedence":5},{"id":"pradosha-vrata","name":"Pradoṣa Vrata","name_sanskrit":"प्रदोष व्रत","tradition":"Shaiva","associated_deity":"Śiva","significance":"Twilight worship of Śiva on Trayodaśī.","vrata":true,"detection":{"any_of":[{"tithi_number":13},{"tithi_number":28}]},"precedence":7}],"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 April 9, 2017 CE · Perth, Australia · Vidhyamitra","description":"April 9, 2017 CE for Perth, Australia: Śukla Trayodaśī, sūryodaya 06:34, sūryāsta 18:03.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2017-04-09","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2017-04-09","sa":"https://sa.vidhyamitra.com/city/perth/2017-04-09","hi":"https://hi.vidhyamitra.com/city/perth/2017-04-09","x-default":"https://vidhyamitra.com/city/perth/2017-04-09"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-15T16:45:29.631Z","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":"2026-05-15T16:45:29.631Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-15T16:45:29.631Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}