{"id":"vidhyamitra:city-day:perth:2009-10-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2009-10-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2009-10-18","date_display":"October 18, 2009 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":2009,"month":10,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2455122.770833,"kali_year":5111,"ahargana":1866657.2708,"sun":{"sidereal_longitude":180.0526,"rashi":7,"rashi_name":"Tulā"},"moon":{"sidereal_longitude":179.4997,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":30,"name":"Amāvasyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Amāvasyā","elongation_degrees":359.4471,"elapsed_within_tithi_degrees":11.4471},"nakshatra":{"number":14,"name":"Citrā","pada":2,"moon_longitude":179.4997,"elapsed_within_degrees":6.1663},"yoga":{"number":27,"name":"Vaidhṛti","sum_longitude":359.5523},"karana":{"half_tithi_index":59,"name":"Nāga"},"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":2009,"month":10,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2455122.770833,"ahargana":1866657.2708,"kali_year":5111,"ayanamsa_lahiri":23.9898,"grahas":{"sun":{"sidereal_longitude":180.80481299999997,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":178.35801300000003,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"retrograde":false,"latitude":-4.4752},"mars":{"sidereal_longitude":96.56211300000001,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":168.24971300000004,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":293.526513,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":159.752113,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":154.455513,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":275.5148,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":95.5148,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":1},"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":2009,"month":10,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2455122.770833,"kali_year":5111,"ahargana":1866657.2708,"sun":{"sidereal_longitude":180.0526,"rashi":7,"rashi_name":"Tulā"},"moon":{"sidereal_longitude":179.4997,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":30,"name":"Amāvasyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Amāvasyā","elongation_degrees":359.4471,"elapsed_within_tithi_degrees":11.4471},"nakshatra":{"number":14,"name":"Citrā","pada":2,"moon_longitude":179.4997,"elapsed_within_degrees":6.1663},"yoga":{"number":27,"name":"Vaidhṛti","sum_longitude":359.5523},"karana":{"half_tithi_index":59,"name":"Nāga"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.475,"elongation":0.553},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.475,"opposition_distance":179.447}},"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":"05:33","sunsetLocal":"18:29","solarNoonLocal":"12:01","dayLengthHours":12.941115900993509,"dayLengthDisplay":"12 Hours 56 Mins 28 Secs","nightLengthDisplay":"11 Hours 03 Mins 32 Secs","moonriseLocal":"05:27","moonsetLocal":"18:16","rahuKala":{"name":"Rāhu Kāla","start":"16:52","end":"18:29","startHours":16.87229082615226,"endHours":18.489930313776448,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:01","end":"13:38","startHours":12.019372363279693,"endHours":13.637011850903882,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:15","end":"16:52","startHours":15.25465133852807,"endHours":16.87229082615226,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:34","end":"09:00","startHours":8.568408123014759,"endHours":8.999778653047876,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:05","end":"06:26","startHours":6.088027575324336,"endHours":6.43312399935083,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:35","end":"12:27","startHours":11.588001833246576,"endHours":12.45074289331281,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:49","end":"04:41","startHours":3.8233322926504716,"endHours":4.686073352716706,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:28","end":"05:33","startHours":4.470388087700147,"endHours":5.5488144127829395,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:11","end":"15:02","startHours":14.17622501344528,"endHours":15.038966073511514,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:17","end":"18:41","startHours":18.28993031377645,"endHours":18.689930313776447,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:29","end":"19:02","startHours":18.489930313776448,"endHours":19.029143476317845,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:14","end":"19:59","startHours":18.239930313776448,"endHours":19.989930313776448,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:35","end":"00:27","startHours":23.588001833246576,"endHours":24.45074289331281,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:33","end":"07:10","startHours":5.5488144127829395,"endHours":7.166453900407128,"quality":"inauspicious"},{"name":"Chala","start":"07:10","end":"08:47","startHours":7.166453900407128,"endHours":8.784093388031316,"quality":"neutral"},{"name":"Labha","start":"08:47","end":"10:24","startHours":8.784093388031316,"endHours":10.401732875655505,"quality":"auspicious"},{"name":"Amṛta","start":"10:24","end":"12:01","startHours":10.401732875655505,"endHours":12.019372363279693,"quality":"auspicious"},{"name":"Kāla","start":"12:01","end":"13:38","startHours":12.019372363279693,"endHours":13.637011850903882,"quality":"inauspicious"},{"name":"Śubha","start":"13:38","end":"15:15","startHours":13.637011850903882,"endHours":15.25465133852807,"quality":"auspicious"},{"name":"Roga","start":"15:15","end":"16:52","startHours":15.25465133852807,"endHours":16.87229082615226,"quality":"inauspicious"},{"name":"Udveg","start":"16:52","end":"18:29","startHours":16.87229082615226,"endHours":18.489930313776448,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:29","end":"19:52","startHours":18.489930313776448,"endHours":19.87229082615226,"quality":"auspicious"},{"name":"Roga","start":"19:52","end":"21:15","startHours":19.87229082615226,"endHours":21.25465133852807,"quality":"inauspicious"},{"name":"Udveg","start":"21:15","end":"22:38","startHours":21.25465133852807,"endHours":22.637011850903882,"quality":"inauspicious"},{"name":"Chala","start":"22:38","end":"00:01","startHours":22.637011850903882,"endHours":24.019372363279693,"quality":"neutral"},{"name":"Labha","start":"00:01","end":"01:24","startHours":24.019372363279693,"endHours":25.401732875655505,"quality":"auspicious"},{"name":"Amṛta","start":"01:24","end":"02:47","startHours":25.401732875655505,"endHours":26.784093388031316,"quality":"auspicious"},{"name":"Kāla","start":"02:47","end":"04:10","startHours":26.784093388031316,"endHours":28.166453900407127,"quality":"inauspicious"},{"name":"Śubha","start":"04:10","end":"05:33","startHours":28.166453900407127,"endHours":29.54881441278294,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:33","end":"06:33","startHours":5.5488144127829395,"endHours":6.5488144127829395,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:33","end":"07:33","startHours":6.5488144127829395,"endHours":7.5488144127829395,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:33","end":"08:33","startHours":7.5488144127829395,"endHours":8.548814412782939,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:33","end":"09:33","startHours":8.548814412782939,"endHours":9.548814412782939,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:33","end":"10:33","startHours":9.548814412782939,"endHours":10.548814412782939,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:33","end":"11:33","startHours":10.548814412782939,"endHours":11.548814412782939,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:33","end":"12:33","startHours":11.548814412782939,"endHours":12.548814412782939,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:33","end":"13:33","startHours":12.548814412782939,"endHours":13.548814412782939,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:33","end":"14:33","startHours":13.548814412782939,"endHours":14.548814412782939,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:33","end":"15:33","startHours":14.548814412782939,"endHours":15.548814412782939,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:33","end":"16:33","startHours":15.548814412782939,"endHours":16.54881441278294,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:33","end":"17:33","startHours":16.54881441278294,"endHours":17.54881441278294,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:33","end":"18:33","startHours":17.54881441278294,"endHours":18.54881441278294,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:33","end":"19:33","startHours":18.54881441278294,"endHours":19.54881441278294,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:33","end":"20:33","startHours":19.54881441278294,"endHours":20.54881441278294,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:33","end":"21:33","startHours":20.54881441278294,"endHours":21.54881441278294,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:33","end":"22:33","startHours":21.54881441278294,"endHours":22.54881441278294,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:33","end":"23:33","startHours":22.54881441278294,"endHours":23.54881441278294,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:33","end":"00:33","startHours":23.54881441278294,"endHours":24.54881441278294,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:33","end":"01:33","startHours":24.54881441278294,"endHours":25.54881441278294,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:33","end":"02:33","startHours":25.54881441278294,"endHours":26.54881441278294,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:33","end":"03:33","startHours":26.54881441278294,"endHours":27.54881441278294,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:33","end":"04:33","startHours":27.54881441278294,"endHours":28.54881441278294,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:33","end":"05:33","startHours":28.54881441278294,"endHours":29.54881441278294,"planetary_lord":"Jupiter"}],"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":["Mithuna","Karka","Kanyā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Tulā","Dhanu","Makara"]},"dishaShool":"West (Paścim)","chandraVasa":"North-West","rahuVasa":"North-East","anandadiYoga":{"name":"Padma","quality":"Auspicious"},"tropicalRitu":"Śarad (Autumn)","vedicRitu":"Śarad (Autumn)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-9.601569842044363,"eotMinutes":15.395658203218455,"ayanamsa":23.9898}},"calendars":{"vikram_samvat":2066,"vikram_samvatsara":"Śubhakṛt","saka_samvat":1931,"saka_samvatsara":"Virodhi","bengali_samvat":1416,"malayalam_era":1185,"nanakshahi_year":540,"lunar_month":"Kārtika","lunar_month_paksha_full":"Kārtika Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Kārtika","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":"Kārtika Kṛṣṇa Amāvasyā · Vikram 2066 Śubhakṛt · Śaka 1931 Virodhi"},"festivals":[{"id":"diwali","name":"Dīpāvalī (Diwali)","name_sanskrit":"दीपावली","tradition":"Pan-Hindu","associated_deity":"Lakshmi-Mata","significance":"Lakshmi-Pūjā night; festival of lights; Rāma's return to Ayodhyā.","vrata":false,"detection":{"tithi_number":30,"lunar_month":"Kārtika"},"precedence":1},{"id":"lakshmi-puja","name":"Lakṣmī Pūjā (Diwali main day)","name_sanskrit":"लक्ष्मी पूजा","tradition":"Pan-Hindu","associated_deity":"Mahā-Lakṣmī","significance":"Mahā-Lakṣmī Pūjā on Kārtika Amāvasyā; Diwali main day.","vrata":true,"primary_observance":"Pradoṣa-time Lakṣmī-pūjā in cleaned home; deepa-mālā lighting.","detection":{"tithi_number":30,"tithi_paksha":"Kṛṣṇa","lunar_month":"Kārtika"},"precedence":1},{"id":"tula-sankranti","name":"Tulā Saṅkrānti","name_sanskrit":"तुला सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Libra.","vrata":false,"detection":{"sun_rashi_ingress":"Tulā"},"precedence":5}],"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":[{"historical_date":"-3137-10-20","event":"Karṇa-Vadha (Mahābhārata Day 17)","chart_id":"karna","shared_marker":"same Kṛṣṇa Amāvasyā","url":"/day/-3137-10-20","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 October 18, 2009 CE · Perth, Australia · Vidhyamitra","description":"October 18, 2009 CE for Perth, Australia: Kṛṣṇa Amāvasyā, sūryodaya 05:33, sūryāsta 18:29.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2009-10-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2009-10-18","sa":"https://sa.vidhyamitra.com/city/perth/2009-10-18","hi":"https://hi.vidhyamitra.com/city/perth/2009-10-18","x-default":"https://vidhyamitra.com/city/perth/2009-10-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T12:14:57.685Z","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":"2026-06-02T12:14:57.685Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T12:14:57.685Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}