{"id":"vidhyamitra:city-day:perth:1909-05-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1909-05-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1909-05-13","date_display":"May 13, 1909 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":1909,"month":5,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2418439.770833,"kali_year":5011,"ahargana":1829974.2708,"sun":{"sidereal_longitude":29.2534,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":303.2759,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":23,"name":"Aṣṭamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Aṣṭamī","elongation_degrees":274.0225,"elapsed_within_tithi_degrees":10.0225},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3,"moon_longitude":303.2759,"elapsed_within_degrees":9.9426},"yoga":{"number":25,"name":"Brahma","sum_longitude":332.5293},"karana":{"half_tithi_index":45,"name":"Kaulava"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"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":1909,"month":5,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2418439.770833,"ahargana":1829974.2708,"kali_year":5011,"ayanamsa_lahiri":22.5868,"grahas":{"sun":{"sidereal_longitude":29.050073999999995,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":300.76727400000004,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false,"latitude":-4.0479},"mars":{"sidereal_longitude":300.50947399999995,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":50.70577400000002,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":133.29977399999996,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":34.10617400000001,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":356.383574,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":59.1567,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":239.1567,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","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":1909,"month":5,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2418439.770833,"kali_year":5011,"ahargana":1829974.2708,"sun":{"sidereal_longitude":29.2534,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":303.2759,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":23,"name":"Aṣṭamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Aṣṭamī","elongation_degrees":274.0225,"elapsed_within_tithi_degrees":10.0225},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3,"moon_longitude":303.2759,"elapsed_within_degrees":9.9426},"yoga":{"number":25,"name":"Brahma","sum_longitude":332.5293},"karana":{"half_tithi_index":45,"name":"Kaulava"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.048,"elongation":85.977},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.048,"opposition_distance":94.023}},"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":"06:56","sunsetLocal":"17:30","solarNoonLocal":"12:13","dayLengthHours":10.565509815169541,"dayLengthDisplay":"10 Hours 33 Mins 56 Secs","nightLengthDisplay":"13 Hours 26 Mins 04 Secs","moonriseLocal":"23:42","moonsetLocal":"12:58","rahuKala":{"name":"Rāhu Kāla","start":"13:32","end":"14:51","startHours":13.534098081170253,"endHours":14.854786808066446,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"06:56","end":"08:15","startHours":6.93065444668929,"endHours":8.251343173585482,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"09:34","end":"10:54","startHours":9.572031900481676,"endHours":10.892720627377868,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:24","end":"09:45","startHours":9.39594007022885,"endHours":9.7481237307345,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:22","end":"07:39","startHours":7.370884022321354,"endHours":7.652630950725875,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:52","end":"12:34","startHours":11.861225693768407,"endHours":12.565593014779711,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:31","end":"06:14","startHours":5.521919804666684,"endHours":6.226287125677987,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:03","end":"06:56","startHours":6.050195295425161,"endHours":6.93065444668929,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:58","end":"14:41","startHours":13.974327656802316,"endHours":14.678694977813619,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:18","end":"17:42","startHours":17.29616426185883,"endHours":17.69616426185883,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:30","end":"17:56","startHours":17.49616426185883,"endHours":17.936393837490893,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:15","end":"19:00","startHours":17.24616426185883,"endHours":18.99616426185883,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:52","end":"00:34","startHours":23.861225693768407,"endHours":24.56559301477971,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"06:56","end":"08:15","startHours":6.93065444668929,"endHours":8.251343173585482,"quality":"auspicious"},{"name":"Roga","start":"08:15","end":"09:34","startHours":8.251343173585482,"endHours":9.572031900481676,"quality":"inauspicious"},{"name":"Udveg","start":"09:34","end":"10:54","startHours":9.572031900481676,"endHours":10.892720627377868,"quality":"inauspicious"},{"name":"Chala","start":"10:54","end":"12:13","startHours":10.892720627377868,"endHours":12.21340935427406,"quality":"neutral"},{"name":"Labha","start":"12:13","end":"13:32","startHours":12.21340935427406,"endHours":13.534098081170253,"quality":"auspicious"},{"name":"Amṛta","start":"13:32","end":"14:51","startHours":13.534098081170253,"endHours":14.854786808066446,"quality":"auspicious"},{"name":"Kāla","start":"14:51","end":"16:11","startHours":14.854786808066446,"endHours":16.175475534962636,"quality":"inauspicious"},{"name":"Śubha","start":"16:11","end":"17:30","startHours":16.175475534962636,"endHours":17.49616426185883,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"17:30","end":"19:11","startHours":17.49616426185883,"endHours":19.175475534962636,"quality":"auspicious"},{"name":"Kāla","start":"19:11","end":"20:51","startHours":19.175475534962636,"endHours":20.854786808066443,"quality":"inauspicious"},{"name":"Śubha","start":"20:51","end":"22:32","startHours":20.854786808066443,"endHours":22.534098081170253,"quality":"auspicious"},{"name":"Roga","start":"22:32","end":"00:13","startHours":22.534098081170253,"endHours":24.21340935427406,"quality":"inauspicious"},{"name":"Udveg","start":"00:13","end":"01:54","startHours":24.21340935427406,"endHours":25.892720627377866,"quality":"inauspicious"},{"name":"Chala","start":"01:54","end":"03:34","startHours":25.892720627377866,"endHours":27.572031900481676,"quality":"neutral"},{"name":"Labha","start":"03:34","end":"05:15","startHours":27.572031900481676,"endHours":29.251343173585482,"quality":"auspicious"},{"name":"Amṛta","start":"05:15","end":"06:56","startHours":29.251343173585482,"endHours":30.93065444668929,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:56","end":"07:56","startHours":6.93065444668929,"endHours":7.93065444668929,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"07:56","end":"08:56","startHours":7.93065444668929,"endHours":8.930654446689289,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"08:56","end":"09:56","startHours":8.930654446689289,"endHours":9.930654446689289,"planetary_lord":"Moon"},{"name":"Hora 4","start":"09:56","end":"10:56","startHours":9.930654446689289,"endHours":10.930654446689289,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"10:56","end":"11:56","startHours":10.930654446689289,"endHours":11.930654446689289,"planetary_lord":"Venus"},{"name":"Hora 6","start":"11:56","end":"12:56","startHours":11.930654446689289,"endHours":12.930654446689289,"planetary_lord":"Sun"},{"name":"Hora 7","start":"12:56","end":"13:56","startHours":12.930654446689289,"endHours":13.930654446689289,"planetary_lord":"Mars"},{"name":"Hora 8","start":"13:56","end":"14:56","startHours":13.930654446689289,"endHours":14.930654446689289,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"14:56","end":"15:56","startHours":14.930654446689289,"endHours":15.930654446689289,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"15:56","end":"16:56","startHours":15.930654446689289,"endHours":16.93065444668929,"planetary_lord":"Moon"},{"name":"Hora 11","start":"16:56","end":"17:56","startHours":16.93065444668929,"endHours":17.93065444668929,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"17:56","end":"18:56","startHours":17.93065444668929,"endHours":18.93065444668929,"planetary_lord":"Venus"},{"name":"Hora 13","start":"18:56","end":"19:56","startHours":18.93065444668929,"endHours":19.93065444668929,"planetary_lord":"Sun"},{"name":"Hora 14","start":"19:56","end":"20:56","startHours":19.93065444668929,"endHours":20.93065444668929,"planetary_lord":"Mars"},{"name":"Hora 15","start":"20:56","end":"21:56","startHours":20.93065444668929,"endHours":21.93065444668929,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"21:56","end":"22:56","startHours":21.93065444668929,"endHours":22.93065444668929,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"22:56","end":"23:56","startHours":22.93065444668929,"endHours":23.93065444668929,"planetary_lord":"Moon"},{"name":"Hora 18","start":"23:56","end":"00:56","startHours":23.93065444668929,"endHours":24.93065444668929,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"00:56","end":"01:56","startHours":24.93065444668929,"endHours":25.93065444668929,"planetary_lord":"Venus"},{"name":"Hora 20","start":"01:56","end":"02:56","startHours":25.93065444668929,"endHours":26.93065444668929,"planetary_lord":"Sun"},{"name":"Hora 21","start":"02:56","end":"03:56","startHours":26.93065444668929,"endHours":27.93065444668929,"planetary_lord":"Mars"},{"name":"Hora 22","start":"03:56","end":"04:56","startHours":27.93065444668929,"endHours":28.93065444668929,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"04:56","end":"05:56","startHours":28.93065444668929,"endHours":29.93065444668929,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"05:56","end":"06:56","startHours":29.93065444668929,"endHours":30.93065444668929,"planetary_lord":"Moon"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Maghā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Dhanu","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Tulā","Makara","Mīna"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"South","rahuVasa":"North-West","anandadiYoga":{"name":"Chatra","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring) (tropical)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":18.171313793741227,"eotMinutes":3.7534387435564067,"ayanamsa":22.5868}},"calendars":{"vikram_samvat":1966,"vikram_samvatsara":"Dundubhi","saka_samvat":1831,"saka_samvatsara":"Saumya","bengali_samvat":1316,"malayalam_era":1085,"nanakshahi_year":440,"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":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Grīṣma (Summer)","display_summary":"Jyeṣṭha Kṛṣṇa Aṣṭamī · Vikram 1966 Dundubhi · Śaka 1831 Saumya"},"festivals":[],"todays_walk":{"walk":{"id":"guru-walk","name":"Bṛhaspati Walk","name_sanskrit":"गुरु यात्रा","type":"graha","description":"Wisdom transmission + BG 4.34.","step_count":8,"url":"/walk/guru-walk"},"reason":"Guruvāra (Thursday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3226-07-09","event":"Bhagavān Krishna's birth at Mathurā","chart_id":"krishna","shared_marker":"same Kṛṣṇa Aṣṭamī","url":"/day/-3226-07-09","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 May 13, 1909 CE · Perth, Australia · Vidhyamitra","description":"May 13, 1909 CE for Perth, Australia: Kṛṣṇa Aṣṭamī, sūryodaya 06:56, sūryāsta 17:30.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1909-05-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1909-05-13","sa":"https://sa.vidhyamitra.com/city/perth/1909-05-13","hi":"https://hi.vidhyamitra.com/city/perth/1909-05-13","x-default":"https://vidhyamitra.com/city/perth/1909-05-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T04:18:35.948Z","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":"2026-06-01T04:18:35.948Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T04:18:35.948Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}