{"id":"vidhyamitra:city-day:perth:1909-10-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1909-10-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1909-10-18","date_display":"October 18, 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":10,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2418597.770833,"kali_year":5011,"ahargana":1830132.2708,"sun":{"sidereal_longitude":180.924,"rashi":7,"rashi_name":"Tulā"},"moon":{"sidereal_longitude":224.6116,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":43.6876,"elapsed_within_tithi_degrees":7.6876},"nakshatra":{"number":17,"name":"Anurādhā","pada":4,"moon_longitude":224.6116,"elapsed_within_degrees":11.2783},"yoga":{"number":4,"name":"Saubhāgya","sum_longitude":45.5356},"karana":{"half_tithi_index":7,"name":"Viṣṭi"},"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":1909,"month":10,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2418597.770833,"ahargana":1830132.2708,"kali_year":5011,"ayanamsa_lahiri":22.5929,"grahas":{"sun":{"sidereal_longitude":181.43323699999996,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":221.998337,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":3},"retrograde":false,"latitude":0.4834},"mars":{"sidereal_longitude":334.38253699999996,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":172.07593700000007,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":159.92933700000003,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"venus":{"sidereal_longitude":225.297237,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":358.008137,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":50.7851,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":230.7851,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","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":1909,"month":10,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2418597.770833,"kali_year":5011,"ahargana":1830132.2708,"sun":{"sidereal_longitude":180.924,"rashi":7,"rashi_name":"Tulā"},"moon":{"sidereal_longitude":224.6116,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":43.6876,"elapsed_within_tithi_degrees":7.6876},"nakshatra":{"number":17,"name":"Anurādhā","pada":4,"moon_longitude":224.6116,"elapsed_within_degrees":11.2783},"yoga":{"number":4,"name":"Saubhāgya","sum_longitude":45.5356},"karana":{"half_tithi_index":7,"name":"Viṣṭi"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":0.483,"elongation":43.688},"lunar":{"type":"lunar","occurs":false,"moon_latitude":0.483,"opposition_distance":136.312}},"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":"05:34","sunsetLocal":"18:29","solarNoonLocal":"12:01","dayLengthHours":12.916711883818818,"dayLengthDisplay":"12 Hours 55 Mins 00 Secs","nightLengthDisplay":"11 Hours 05 Mins 00 Secs","moonriseLocal":"07:45","moonsetLocal":"21:42","rahuKala":{"name":"Rāhu Kāla","start":"07:11","end":"08:47","startHours":7.175605406847637,"endHours":8.79019439232499,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:24","end":"12:01","startHours":10.404783377802342,"endHours":12.019372363279693,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:38","end":"15:15","startHours":13.633961348757046,"endHours":15.248550334234398,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:34","end":"09:00","startHours":8.574915860928009,"endHours":9.00547292372197,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:06","end":"06:27","startHours":6.099212749862736,"endHours":6.443658400097904,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:35","end":"12:27","startHours":11.588815300485733,"endHours":12.449929426073654,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:50","end":"04:42","startHours":3.8387881701944426,"endHours":4.699902295782364,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:29","end":"05:34","startHours":4.4846237643853835,"endHours":5.561016421370285,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:10","end":"15:02","startHours":14.172157677249498,"endHours":15.033271802837419,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:17","end":"18:41","startHours":18.277728305189104,"endHours":18.677728305189103,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:29","end":"19:01","startHours":18.477728305189103,"endHours":19.015924633681554,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:14","end":"19:59","startHours":18.227728305189103,"endHours":19.977728305189103,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:35","end":"00:27","startHours":23.58881530048573,"endHours":24.449929426073655,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"05:34","end":"07:11","startHours":5.561016421370285,"endHours":7.175605406847637,"quality":"auspicious"},{"name":"Kāla","start":"07:11","end":"08:47","startHours":7.175605406847637,"endHours":8.79019439232499,"quality":"inauspicious"},{"name":"Śubha","start":"08:47","end":"10:24","startHours":8.79019439232499,"endHours":10.404783377802342,"quality":"auspicious"},{"name":"Roga","start":"10:24","end":"12:01","startHours":10.404783377802342,"endHours":12.019372363279693,"quality":"inauspicious"},{"name":"Udveg","start":"12:01","end":"13:38","startHours":12.019372363279693,"endHours":13.633961348757046,"quality":"inauspicious"},{"name":"Chala","start":"13:38","end":"15:15","startHours":13.633961348757046,"endHours":15.248550334234398,"quality":"neutral"},{"name":"Labha","start":"15:15","end":"16:52","startHours":15.248550334234398,"endHours":16.86313931971175,"quality":"auspicious"},{"name":"Amṛta","start":"16:52","end":"18:29","startHours":16.86313931971175,"endHours":18.477728305189103,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"18:29","end":"19:52","startHours":18.477728305189103,"endHours":19.863139319711753,"quality":"neutral"},{"name":"Labha","start":"19:52","end":"21:15","startHours":19.863139319711753,"endHours":21.248550334234398,"quality":"auspicious"},{"name":"Amṛta","start":"21:15","end":"22:38","startHours":21.248550334234398,"endHours":22.633961348757047,"quality":"auspicious"},{"name":"Kāla","start":"22:38","end":"00:01","startHours":22.633961348757047,"endHours":24.019372363279693,"quality":"inauspicious"},{"name":"Śubha","start":"00:01","end":"01:24","startHours":24.019372363279693,"endHours":25.404783377802342,"quality":"auspicious"},{"name":"Roga","start":"01:24","end":"02:47","startHours":25.404783377802342,"endHours":26.79019439232499,"quality":"inauspicious"},{"name":"Udveg","start":"02:47","end":"04:11","startHours":26.79019439232499,"endHours":28.175605406847637,"quality":"inauspicious"},{"name":"Chala","start":"04:11","end":"05:34","startHours":28.175605406847637,"endHours":29.561016421370283,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"05:34","end":"06:34","startHours":5.561016421370285,"endHours":6.561016421370285,"planetary_lord":"Moon"},{"name":"Hora 2","start":"06:34","end":"07:34","startHours":6.561016421370285,"endHours":7.561016421370285,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"07:34","end":"08:34","startHours":7.561016421370285,"endHours":8.561016421370285,"planetary_lord":"Venus"},{"name":"Hora 4","start":"08:34","end":"09:34","startHours":8.561016421370285,"endHours":9.561016421370285,"planetary_lord":"Sun"},{"name":"Hora 5","start":"09:34","end":"10:34","startHours":9.561016421370285,"endHours":10.561016421370285,"planetary_lord":"Mars"},{"name":"Hora 6","start":"10:34","end":"11:34","startHours":10.561016421370285,"endHours":11.561016421370285,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"11:34","end":"12:34","startHours":11.561016421370285,"endHours":12.561016421370285,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"12:34","end":"13:34","startHours":12.561016421370285,"endHours":13.561016421370285,"planetary_lord":"Moon"},{"name":"Hora 9","start":"13:34","end":"14:34","startHours":13.561016421370285,"endHours":14.561016421370285,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"14:34","end":"15:34","startHours":14.561016421370285,"endHours":15.561016421370285,"planetary_lord":"Venus"},{"name":"Hora 11","start":"15:34","end":"16:34","startHours":15.561016421370285,"endHours":16.561016421370283,"planetary_lord":"Sun"},{"name":"Hora 12","start":"16:34","end":"17:34","startHours":16.561016421370283,"endHours":17.561016421370283,"planetary_lord":"Mars"},{"name":"Hora 13","start":"17:34","end":"18:34","startHours":17.561016421370283,"endHours":18.561016421370283,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"18:34","end":"19:34","startHours":18.561016421370283,"endHours":19.561016421370283,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"19:34","end":"20:34","startHours":19.561016421370283,"endHours":20.561016421370283,"planetary_lord":"Moon"},{"name":"Hora 16","start":"20:34","end":"21:34","startHours":20.561016421370283,"endHours":21.561016421370283,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"21:34","end":"22:34","startHours":21.561016421370283,"endHours":22.561016421370283,"planetary_lord":"Venus"},{"name":"Hora 18","start":"22:34","end":"23:34","startHours":22.561016421370283,"endHours":23.561016421370283,"planetary_lord":"Sun"},{"name":"Hora 19","start":"23:34","end":"00:34","startHours":23.561016421370283,"endHours":24.561016421370283,"planetary_lord":"Mars"},{"name":"Hora 20","start":"00:34","end":"01:34","startHours":24.561016421370283,"endHours":25.561016421370283,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"01:34","end":"02:34","startHours":25.561016421370283,"endHours":26.561016421370283,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"02:34","end":"03:34","startHours":26.561016421370283,"endHours":27.561016421370283,"planetary_lord":"Moon"},{"name":"Hora 23","start":"03:34","end":"04:34","startHours":27.561016421370283,"endHours":28.561016421370283,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"04:34","end":"05:34","startHours":28.561016421370283,"endHours":29.561016421370283,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Revatī"],"unfavorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Citrā","Svātī","Viśākhā","Anurādhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Vṛścika","Makara"],"unfavorable_rashis":["Mithuna","Karka","Tulā","Dhanu","Kumbha","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"North-East","rahuVasa":"North-East","anandadiYoga":{"name":"Amṛta","quality":"Auspicious"},"tropicalRitu":"Śarad (Autumn)","vedicRitu":"Śarad (Autumn)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-9.319408385231387,"eotMinutes":15.395658203218455,"ayanamsa":22.5929}},"calendars":{"vikram_samvat":1966,"vikram_samvatsara":"Dundubhi","saka_samvat":1831,"saka_samvatsara":"Saumya","bengali_samvat":1316,"malayalam_era":1085,"nanakshahi_year":440,"lunar_month":"Āśvina","lunar_month_paksha_full":"Āśvina Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Āśvina","lunar_month_amanta":"Āśvina","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Tulā (Aippasi)","ritu":"Śarad (Autumn)","display_summary":"Āśvina Śukla Caturthī · Vikram 1966 Dundubhi · Śaka 1831 Saumya"},"festivals":[{"id":"vinayaka-chaturthi","name":"Vināyaka Caturthī (monthly)","name_sanskrit":"विनायक चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Śukla-pakṣa Caturthī; auspicious for new ventures.","vrata":true,"detection":{"tithi_number":4,"tithi_paksha":"Śukla"},"precedence":6}],"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 October 18, 1909 CE · Perth, Australia · Vidhyamitra","description":"October 18, 1909 CE for Perth, Australia: Śukla Caturthī, sūryodaya 05:34, sūryāsta 18:29.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1909-10-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1909-10-18","sa":"https://sa.vidhyamitra.com/city/perth/1909-10-18","hi":"https://hi.vidhyamitra.com/city/perth/1909-10-18","x-default":"https://vidhyamitra.com/city/perth/1909-10-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T11:02:13.996Z","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":"2026-06-01T11:02:13.996Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T11:02:13.996Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}