{"id":"vidhyamitra:city-day:perth:1815-05-15:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1815-05-15","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1815-05-15","date_display":"May 15, 1815 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":1815,"month":5,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2384108.770833,"kali_year":4917,"ahargana":1795643.2708,"sun":{"sidereal_longitude":32.4374,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":107.4628,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":7,"name":"Saptamī","paksha":"Śukla","full_name":"Śukla Saptamī","elongation_degrees":75.0254,"elapsed_within_tithi_degrees":3.0254},"nakshatra":{"number":9,"name":"Āśleṣā","pada":1,"moon_longitude":107.4628,"elapsed_within_degrees":0.7961},"yoga":{"number":11,"name":"Vṛddhi","sum_longitude":139.9002},"karana":{"half_tithi_index":12,"name":"Gara"},"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":1815,"month":5,"day":15,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2384108.770833,"ahargana":1795643.2708,"kali_year":4917,"ayanamsa_lahiri":21.2738,"grahas":{"sun":{"sidereal_longitude":32.03386999999998,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":107.89807000000002,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":1},"retrograde":false,"latitude":2.1994},"mars":{"sidereal_longitude":312.83087,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":26.22566999999998,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":161.19817,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":true},"venus":{"sidereal_longitude":67.97496999999998,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":292.8701699999999,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":78.1783,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":258.1783,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","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":1815,"month":5,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2384108.770833,"kali_year":4917,"ahargana":1795643.2708,"sun":{"sidereal_longitude":32.4374,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":107.4628,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":7,"name":"Saptamī","paksha":"Śukla","full_name":"Śukla Saptamī","elongation_degrees":75.0254,"elapsed_within_tithi_degrees":3.0254},"nakshatra":{"number":9,"name":"Āśleṣā","pada":1,"moon_longitude":107.4628,"elapsed_within_degrees":0.7961},"yoga":{"number":11,"name":"Vṛddhi","sum_longitude":139.9002},"karana":{"half_tithi_index":12,"name":"Gara"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.199,"elongation":75.025},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.199,"opposition_distance":104.975}},"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":"06:57","sunsetLocal":"17:29","solarNoonLocal":"12:13","dayLengthHours":10.525743930923795,"dayLengthDisplay":"10 Hours 31 Mins 33 Secs","nightLengthDisplay":"13 Hours 28 Mins 27 Secs","moonriseLocal":"12:00","moonsetLocal":"22:33","rahuKala":{"name":"Rāhu Kāla","start":"08:16","end":"09:35","startHours":8.266209343638142,"endHours":9.581927335003616,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:54","end":"12:13","startHours":10.89764532636909,"endHours":12.213363317734565,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:32","end":"14:51","startHours":13.52908130910004,"endHours":14.844799300465514,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:24","end":"09:45","startHours":9.406498269488221,"endHours":9.757356400519013,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:23","end":"07:40","startHours":7.38906401606116,"endHours":7.669750520885795,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:52","end":"12:34","startHours":11.862505186703771,"endHours":12.564221448765359,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:33","end":"06:15","startHours":5.5470588281494955,"endHours":6.248775090211082,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:04","end":"06:57","startHours":6.073346024695685,"endHours":6.950491352272668,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:58","end":"14:40","startHours":13.967653972888531,"endHours":14.669370234950117,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:17","end":"17:41","startHours":17.276235283196463,"endHours":17.676235283196462,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:29","end":"17:55","startHours":17.476235283196463,"endHours":17.914807946984954,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:14","end":"18:59","startHours":17.226235283196463,"endHours":18.976235283196463,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:52","end":"00:34","startHours":23.86250518670377,"endHours":24.56422144876536,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"06:57","end":"08:16","startHours":6.950491352272668,"endHours":8.266209343638142,"quality":"auspicious"},{"name":"Kāla","start":"08:16","end":"09:35","startHours":8.266209343638142,"endHours":9.581927335003616,"quality":"inauspicious"},{"name":"Śubha","start":"09:35","end":"10:54","startHours":9.581927335003616,"endHours":10.89764532636909,"quality":"auspicious"},{"name":"Roga","start":"10:54","end":"12:13","startHours":10.89764532636909,"endHours":12.213363317734565,"quality":"inauspicious"},{"name":"Udveg","start":"12:13","end":"13:32","startHours":12.213363317734565,"endHours":13.52908130910004,"quality":"inauspicious"},{"name":"Chala","start":"13:32","end":"14:51","startHours":13.52908130910004,"endHours":14.844799300465514,"quality":"neutral"},{"name":"Labha","start":"14:51","end":"16:10","startHours":14.844799300465514,"endHours":16.16051729183099,"quality":"auspicious"},{"name":"Amṛta","start":"16:10","end":"17:29","startHours":16.16051729183099,"endHours":17.476235283196463,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"17:29","end":"19:10","startHours":17.476235283196463,"endHours":19.16051729183099,"quality":"neutral"},{"name":"Labha","start":"19:10","end":"20:51","startHours":19.16051729183099,"endHours":20.844799300465514,"quality":"auspicious"},{"name":"Amṛta","start":"20:51","end":"22:32","startHours":20.844799300465514,"endHours":22.52908130910004,"quality":"auspicious"},{"name":"Kāla","start":"22:32","end":"00:13","startHours":22.52908130910004,"endHours":24.213363317734565,"quality":"inauspicious"},{"name":"Śubha","start":"00:13","end":"01:54","startHours":24.213363317734565,"endHours":25.89764532636909,"quality":"auspicious"},{"name":"Roga","start":"01:54","end":"03:35","startHours":25.89764532636909,"endHours":27.581927335003616,"quality":"inauspicious"},{"name":"Udveg","start":"03:35","end":"05:16","startHours":27.581927335003616,"endHours":29.266209343638142,"quality":"inauspicious"},{"name":"Chala","start":"05:16","end":"06:57","startHours":29.266209343638142,"endHours":30.950491352272667,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"06:57","end":"07:57","startHours":6.950491352272668,"endHours":7.950491352272668,"planetary_lord":"Moon"},{"name":"Hora 2","start":"07:57","end":"08:57","startHours":7.950491352272668,"endHours":8.950491352272667,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"08:57","end":"09:57","startHours":8.950491352272667,"endHours":9.950491352272667,"planetary_lord":"Venus"},{"name":"Hora 4","start":"09:57","end":"10:57","startHours":9.950491352272667,"endHours":10.950491352272667,"planetary_lord":"Sun"},{"name":"Hora 5","start":"10:57","end":"11:57","startHours":10.950491352272667,"endHours":11.950491352272667,"planetary_lord":"Mars"},{"name":"Hora 6","start":"11:57","end":"12:57","startHours":11.950491352272667,"endHours":12.950491352272667,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"12:57","end":"13:57","startHours":12.950491352272667,"endHours":13.950491352272667,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"13:57","end":"14:57","startHours":13.950491352272667,"endHours":14.950491352272667,"planetary_lord":"Moon"},{"name":"Hora 9","start":"14:57","end":"15:57","startHours":14.950491352272667,"endHours":15.950491352272667,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"15:57","end":"16:57","startHours":15.950491352272667,"endHours":16.950491352272667,"planetary_lord":"Venus"},{"name":"Hora 11","start":"16:57","end":"17:57","startHours":16.950491352272667,"endHours":17.950491352272667,"planetary_lord":"Sun"},{"name":"Hora 12","start":"17:57","end":"18:57","startHours":17.950491352272667,"endHours":18.950491352272667,"planetary_lord":"Mars"},{"name":"Hora 13","start":"18:57","end":"19:57","startHours":18.950491352272667,"endHours":19.950491352272667,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"19:57","end":"20:57","startHours":19.950491352272667,"endHours":20.950491352272667,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"20:57","end":"21:57","startHours":20.950491352272667,"endHours":21.950491352272667,"planetary_lord":"Moon"},{"name":"Hora 16","start":"21:57","end":"22:57","startHours":21.950491352272667,"endHours":22.950491352272667,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"22:57","end":"23:57","startHours":22.950491352272667,"endHours":23.950491352272667,"planetary_lord":"Venus"},{"name":"Hora 18","start":"23:57","end":"00:57","startHours":23.950491352272667,"endHours":24.950491352272667,"planetary_lord":"Sun"},{"name":"Hora 19","start":"00:57","end":"01:57","startHours":24.950491352272667,"endHours":25.950491352272667,"planetary_lord":"Mars"},{"name":"Hora 20","start":"01:57","end":"02:57","startHours":25.950491352272667,"endHours":26.950491352272667,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"02:57","end":"03:57","startHours":26.950491352272667,"endHours":27.950491352272667,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"03:57","end":"04:57","startHours":27.950491352272667,"endHours":28.950491352272667,"planetary_lord":"Moon"},{"name":"Hora 23","start":"04:57","end":"05:57","startHours":28.950491352272667,"endHours":29.950491352272667,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"05:57","end":"06:57","startHours":29.950491352272667,"endHours":30.950491352272667,"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":["Meṣa","Vṛṣabha","Karka","Kanyā","Dhanu","Makara"],"unfavorable_rashis":["Mithuna","Siṃha","Tulā","Vṛścika","Kumbha","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"South-West","rahuVasa":"North-East","anandadiYoga":{"name":"Mānasa","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":18.59786646821975,"eotMinutes":3.7562009359260493,"ayanamsa":21.2738}},"calendars":{"vikram_samvat":1872,"vikram_samvatsara":"Sarvadhāri","saka_samvat":1737,"saka_samvatsara":"Yuva","bengali_samvat":1222,"malayalam_era":991,"nanakshahi_year":346,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Vaiśākha","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":"Vasanta (Spring)","display_summary":"Vaiśākha Śukla Saptamī · Vikram 1872 Sarvadhāri · Śaka 1737 Yuva"},"festivals":[{"id":"ganga-saptami","name":"Gaṅgā Saptamī","name_sanskrit":"गङ्गा सप्तमी","tradition":"Pan-Hindu","associated_deity":"Devī Gaṅgā","significance":"Gaṅgā Devī's descent to Brahma-loka before her earth-descent.","vrata":true,"detection":{"tithi_number":7,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":4}],"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":[]},"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 15, 1815 CE · Perth, Australia · Vidhyamitra","description":"May 15, 1815 CE for Perth, Australia: Śukla Saptamī, sūryodaya 06:57, sūryāsta 17:29.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1815-05-15","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1815-05-15","sa":"https://sa.vidhyamitra.com/city/perth/1815-05-15","hi":"https://hi.vidhyamitra.com/city/perth/1815-05-15","x-default":"https://vidhyamitra.com/city/perth/1815-05-15"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-05T01:54:11.028Z","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":"2026-06-05T01:54:11.028Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-05T01:54:11.028Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}