{"id":"vidhyamitra:city-day:perth:1902-09-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1902-09-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1902-09-13","date_display":"September 13, 1902 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":1902,"month":9,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2416005.770833,"kali_year":5004,"ahargana":1827540.2708,"sun":{"sidereal_longitude":146.3249,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":270.2546,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":123.9297,"elapsed_within_tithi_degrees":3.9297},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2,"moon_longitude":270.2546,"elapsed_within_degrees":3.5879},"yoga":{"number":5,"name":"Śobhana","sum_longitude":56.5795},"karana":{"half_tithi_index":20,"name":"Vaṇija"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"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":1902,"month":9,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2416005.770833,"ahargana":1827540.2708,"kali_year":5004,"ayanamsa_lahiri":22.4938,"grahas":{"sun":{"sidereal_longitude":146.81347,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":270.93066999999996,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":false,"latitude":4.4576},"mars":{"sidereal_longitude":104.16926999999998,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":171.72037,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":287.02567,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":true},"venus":{"sidereal_longitude":128.58397000000002,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":270.15986999999996,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":188.1217,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":8.1217,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":3},"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":1902,"month":9,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2416005.770833,"kali_year":5004,"ahargana":1827540.2708,"sun":{"sidereal_longitude":146.3249,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":270.2546,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":123.9297,"elapsed_within_tithi_degrees":3.9297},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2,"moon_longitude":270.2546,"elapsed_within_degrees":3.5879},"yoga":{"number":5,"name":"Śobhana","sum_longitude":56.5795},"karana":{"half_tithi_index":20,"name":"Vaṇija"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.458,"elongation":123.93},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.458,"opposition_distance":56.07}},"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":"06:18","sunsetLocal":"18:05","solarNoonLocal":"12:12","dayLengthHours":11.77865811759047,"dayLengthDisplay":"11 Hours 46 Mins 43 Secs","nightLengthDisplay":"12 Hours 13 Mins 17 Secs","moonriseLocal":"13:29","moonsetLocal":"03:28","rahuKala":{"name":"Rāhu Kāla","start":"09:15","end":"10:43","startHours":9.252070955104616,"endHours":10.724403219803424,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:40","end":"15:08","startHours":13.66906774920104,"endHours":15.141400013899851,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:18","end":"07:47","startHours":6.307406425706998,"endHours":7.779738690405807,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:03","end":"09:27","startHours":9.055759986478108,"endHours":9.448381923731123,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:48","end":"07:07","startHours":6.798183847273267,"endHours":7.11228139707568,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:48","end":"12:35","startHours":11.804113547249218,"endHours":12.589357421755247,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:44","end":"05:31","startHours":4.736918676694935,"endHours":5.522162551200966,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:20","end":"06:18","startHours":5.325851582574459,"endHours":6.307406425706998,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:10","end":"14:57","startHours":14.159845170767312,"endHours":14.945089045273344,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:53","end":"18:17","startHours":17.88606454329747,"endHours":18.286064543297467,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:05","end":"18:35","startHours":18.086064543297468,"endHours":18.57684196486374,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:50","end":"19:35","startHours":17.836064543297468,"endHours":19.586064543297468,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:48","end":"00:35","startHours":23.80411354724922,"endHours":24.58935742175525,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"06:18","end":"07:47","startHours":6.307406425706998,"endHours":7.779738690405807,"quality":"inauspicious"},{"name":"Śubha","start":"07:47","end":"09:15","startHours":7.779738690405807,"endHours":9.252070955104616,"quality":"auspicious"},{"name":"Roga","start":"09:15","end":"10:43","startHours":9.252070955104616,"endHours":10.724403219803424,"quality":"inauspicious"},{"name":"Udveg","start":"10:43","end":"12:12","startHours":10.724403219803424,"endHours":12.196735484502234,"quality":"inauspicious"},{"name":"Chala","start":"12:12","end":"13:40","startHours":12.196735484502234,"endHours":13.66906774920104,"quality":"neutral"},{"name":"Labha","start":"13:40","end":"15:08","startHours":13.66906774920104,"endHours":15.141400013899851,"quality":"auspicious"},{"name":"Amṛta","start":"15:08","end":"16:37","startHours":15.141400013899851,"endHours":16.61373227859866,"quality":"auspicious"},{"name":"Kāla","start":"16:37","end":"18:05","startHours":16.61373227859866,"endHours":18.086064543297468,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:05","end":"19:37","startHours":18.086064543297468,"endHours":19.613732278598658,"quality":"auspicious"},{"name":"Amṛta","start":"19:37","end":"21:08","startHours":19.613732278598658,"endHours":21.14140001389985,"quality":"auspicious"},{"name":"Kāla","start":"21:08","end":"22:40","startHours":21.14140001389985,"endHours":22.66906774920104,"quality":"inauspicious"},{"name":"Śubha","start":"22:40","end":"00:12","startHours":22.66906774920104,"endHours":24.196735484502234,"quality":"auspicious"},{"name":"Roga","start":"00:12","end":"01:43","startHours":24.196735484502234,"endHours":25.724403219803424,"quality":"inauspicious"},{"name":"Udveg","start":"01:43","end":"03:15","startHours":25.724403219803424,"endHours":27.252070955104614,"quality":"inauspicious"},{"name":"Chala","start":"03:15","end":"04:47","startHours":27.252070955104614,"endHours":28.779738690405807,"quality":"neutral"},{"name":"Labha","start":"04:47","end":"06:18","startHours":28.779738690405807,"endHours":30.307406425706997,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:18","end":"07:18","startHours":6.307406425706998,"endHours":7.307406425706998,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"07:18","end":"08:18","startHours":7.307406425706998,"endHours":8.307406425706997,"planetary_lord":"Moon"},{"name":"Hora 3","start":"08:18","end":"09:18","startHours":8.307406425706997,"endHours":9.307406425706997,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"09:18","end":"10:18","startHours":9.307406425706997,"endHours":10.307406425706997,"planetary_lord":"Venus"},{"name":"Hora 5","start":"10:18","end":"11:18","startHours":10.307406425706997,"endHours":11.307406425706997,"planetary_lord":"Sun"},{"name":"Hora 6","start":"11:18","end":"12:18","startHours":11.307406425706997,"endHours":12.307406425706997,"planetary_lord":"Mars"},{"name":"Hora 7","start":"12:18","end":"13:18","startHours":12.307406425706997,"endHours":13.307406425706997,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"13:18","end":"14:18","startHours":13.307406425706997,"endHours":14.307406425706997,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"14:18","end":"15:18","startHours":14.307406425706997,"endHours":15.307406425706997,"planetary_lord":"Moon"},{"name":"Hora 10","start":"15:18","end":"16:18","startHours":15.307406425706997,"endHours":16.307406425706997,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"16:18","end":"17:18","startHours":16.307406425706997,"endHours":17.307406425706997,"planetary_lord":"Venus"},{"name":"Hora 12","start":"17:18","end":"18:18","startHours":17.307406425706997,"endHours":18.307406425706997,"planetary_lord":"Sun"},{"name":"Hora 13","start":"18:18","end":"19:18","startHours":18.307406425706997,"endHours":19.307406425706997,"planetary_lord":"Mars"},{"name":"Hora 14","start":"19:18","end":"20:18","startHours":19.307406425706997,"endHours":20.307406425706997,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"20:18","end":"21:18","startHours":20.307406425706997,"endHours":21.307406425706997,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"21:18","end":"22:18","startHours":21.307406425706997,"endHours":22.307406425706997,"planetary_lord":"Moon"},{"name":"Hora 17","start":"22:18","end":"23:18","startHours":22.307406425706997,"endHours":23.307406425706997,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"23:18","end":"00:18","startHours":23.307406425706997,"endHours":24.307406425706997,"planetary_lord":"Venus"},{"name":"Hora 19","start":"00:18","end":"01:18","startHours":24.307406425706997,"endHours":25.307406425706997,"planetary_lord":"Sun"},{"name":"Hora 20","start":"01:18","end":"02:18","startHours":25.307406425706997,"endHours":26.307406425706997,"planetary_lord":"Mars"},{"name":"Hora 21","start":"02:18","end":"03:18","startHours":26.307406425706997,"endHours":27.307406425706997,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"03:18","end":"04:18","startHours":27.307406425706997,"endHours":28.307406425706997,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"04:18","end":"05:18","startHours":28.307406425706997,"endHours":29.307406425706997,"planetary_lord":"Moon"},{"name":"Hora 24","start":"05:18","end":"06:18","startHours":29.307406425706997,"endHours":30.307406425706997,"planetary_lord":"Mercury"}],"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":"East (Pūrva)","chandraVasa":"South-East","rahuVasa":"East","anandadiYoga":{"name":"Mṛtyu","quality":"Inauspicious"},"tropicalRitu":"Varṣā (Monsoon) (tropical)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":4.232049360548566,"eotMinutes":4.753870929866006,"ayanamsa":22.4938}},"calendars":{"vikram_samvat":1959,"vikram_samvatsara":"Rākṣasa","saka_samvat":1824,"saka_samvatsara":"Śubhakṛt","bengali_samvat":1309,"malayalam_era":1078,"nanakshahi_year":433,"lunar_month":"Bhādrapada","lunar_month_paksha_full":"Bhādrapada Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Bhādrapada","lunar_month_amanta":"Bhādrapada","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Siṃha (Āvaṇi)","ritu":"Varṣā (Monsoon)","display_summary":"Bhādrapada Śukla Ekādaśī · Vikram 1959 Rākṣasa · Śaka 1824 Śubhakṛt"},"festivals":[{"id":"parsva-ekadashi","name":"Pārśva (Parivartinī) Ekādaśī","name_sanskrit":"पार्श्व एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu (turning side in yoga-nidrā)","significance":"Viṣṇu turns from one side to another in yoga-nidrā (mid-Cāturmāsya).","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Bhādrapada"},"precedence":3},{"id":"ekadashi","name":"Ekādaśī","name_sanskrit":"एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Sacred to Bhagavān Viṣṇu; vrata for purification.","vrata":true,"detection":{"any_of":[{"tithi_number":11},{"tithi_number":26}]},"precedence":5}],"todays_walk":{"walk":{"id":"shani-walk","name":"Śani Walk","name_sanskrit":"शनि यात्रा","type":"graha","description":"Tapas + endurance + BG 17.14-19.","step_count":7,"url":"/walk/shani-walk"},"reason":"Śanivāra (Saturday) — 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 September 13, 1902 CE · Perth, Australia · Vidhyamitra","description":"September 13, 1902 CE for Perth, Australia: Śukla Ekādaśī, sūryodaya 06:18, sūryāsta 18:05.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1902-09-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1902-09-13","sa":"https://sa.vidhyamitra.com/city/perth/1902-09-13","hi":"https://hi.vidhyamitra.com/city/perth/1902-09-13","x-default":"https://vidhyamitra.com/city/perth/1902-09-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T01:09:56.648Z","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":"2026-06-01T01:09:56.648Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T01:09:56.648Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}