{"id":"vidhyamitra:city-day:perth:2009-12-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2009-12-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2009-12-18","date_display":"December 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":"Not independently benchmarked across the declared range","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":2009,"month":12,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2455183.770833,"kali_year":5111,"ahargana":1866718.2708,"sun":{"sidereal_longitude":241.8643,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":261.3756,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":2,"name":"Dvitīyā","paksha":"Śukla","full_name":"Śukla Dvitīyā","elongation_degrees":19.5113,"elapsed_within_tithi_degrees":7.5113},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3,"moon_longitude":261.3756,"elapsed_within_degrees":8.0422},"yoga":{"number":11,"name":"Vṛddhi","sum_longitude":143.2399},"karana":{"half_tithi_index":3,"name":"Kaulava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"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":12,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2455183.770833,"ahargana":1866718.2708,"kali_year":5111,"ayanamsa_lahiri":23.9922,"grahas":{"sun":{"sidereal_longitude":242.24758300000008,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"moon":{"sidereal_longitude":259.27208300000007,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":2},"retrograde":false,"latitude":-0.8506},"mars":{"sidereal_longitude":115.51408299999997,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":262.4431830000001,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":299.96378300000003,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":236.162283,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":159.78888299999994,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":272.2827,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":92.2827,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":7,"name":"Punarvasu","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":"Not independently benchmarked across the declared range","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":2009,"month":12,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2455183.770833,"kali_year":5111,"ahargana":1866718.2708,"sun":{"sidereal_longitude":241.8643,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":261.3756,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":2,"name":"Dvitīyā","paksha":"Śukla","full_name":"Śukla Dvitīyā","elongation_degrees":19.5113,"elapsed_within_tithi_degrees":7.5113},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3,"moon_longitude":261.3756,"elapsed_within_degrees":8.0422},"yoga":{"number":11,"name":"Vṛddhi","sum_longitude":143.2399},"karana":{"half_tithi_index":3,"name":"Kaulava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-0.851,"elongation":19.511},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-0.851,"opposition_distance":160.489}},"eclipse_window_40days":[{"offset_days":14,"type":"lunar","occurs":true,"moon_latitude":1.039,"opposition_distance":1.922}]},"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":"05:07","sunsetLocal":"19:21","solarNoonLocal":"12:14","dayLengthHours":14.234426121589665,"dayLengthDisplay":"14 Hours 14 Mins 04 Secs","nightLengthDisplay":"9 Hours 45 Mins 56 Secs","moonriseLocal":"06:18","moonsetLocal":"20:26","rahuKala":{"name":"Rāhu Kāla","start":"10:27","end":"12:14","startHours":10.450201278998936,"endHours":12.229504544197646,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"15:47","end":"17:34","startHours":15.788111074595061,"endHours":17.56741433979377,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:53","end":"08:40","startHours":6.89159474860152,"endHours":8.670898013800228,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:26","end":"08:54","startHours":8.4336575784404,"endHours":8.908138449160056,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:42","end":"06:05","startHours":5.705392571802381,"endHours":6.084977268378106,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:45","end":"12:42","startHours":11.75502367347799,"endHours":12.703985414917302,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:13","end":"04:10","startHours":3.21436800052419,"endHours":4.163329741963501,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"03:56","end":"05:07","startHours":3.9260893066036733,"endHours":5.112291483402812,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:36","end":"15:33","startHours":14.601908897795921,"endHours":15.550870639235232,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:09","end":"19:33","startHours":19.146717604992478,"endHours":19.546717604992477,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:21","end":"19:56","startHours":19.346717604992477,"endHours":19.93981869339205,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:06","end":"20:51","startHours":19.096717604992477,"endHours":20.846717604992477,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:45","end":"00:42","startHours":23.75502367347799,"endHours":24.7039854149173,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"05:07","end":"06:53","startHours":5.112291483402812,"endHours":6.89159474860152,"quality":"neutral"},{"name":"Labha","start":"06:53","end":"08:40","startHours":6.89159474860152,"endHours":8.670898013800228,"quality":"auspicious"},{"name":"Amṛta","start":"08:40","end":"10:27","startHours":8.670898013800228,"endHours":10.450201278998936,"quality":"auspicious"},{"name":"Kāla","start":"10:27","end":"12:14","startHours":10.450201278998936,"endHours":12.229504544197646,"quality":"inauspicious"},{"name":"Śubha","start":"12:14","end":"14:01","startHours":12.229504544197646,"endHours":14.008807809396354,"quality":"auspicious"},{"name":"Roga","start":"14:01","end":"15:47","startHours":14.008807809396354,"endHours":15.788111074595061,"quality":"inauspicious"},{"name":"Udveg","start":"15:47","end":"17:34","startHours":15.788111074595061,"endHours":17.56741433979377,"quality":"inauspicious"},{"name":"Chala","start":"17:34","end":"19:21","startHours":17.56741433979377,"endHours":19.346717604992477,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"19:21","end":"20:34","startHours":19.346717604992477,"endHours":20.567414339793768,"quality":"inauspicious"},{"name":"Udveg","start":"20:34","end":"21:47","startHours":20.567414339793768,"endHours":21.78811107459506,"quality":"inauspicious"},{"name":"Chala","start":"21:47","end":"23:01","startHours":21.78811107459506,"endHours":23.00880780939635,"quality":"neutral"},{"name":"Labha","start":"23:01","end":"00:14","startHours":23.00880780939635,"endHours":24.229504544197646,"quality":"auspicious"},{"name":"Amṛta","start":"00:14","end":"01:27","startHours":24.229504544197646,"endHours":25.450201278998936,"quality":"auspicious"},{"name":"Kāla","start":"01:27","end":"02:40","startHours":25.450201278998936,"endHours":26.670898013800226,"quality":"inauspicious"},{"name":"Śubha","start":"02:40","end":"03:53","startHours":26.670898013800226,"endHours":27.89159474860152,"quality":"auspicious"},{"name":"Roga","start":"03:53","end":"05:07","startHours":27.89159474860152,"endHours":29.112291483402814,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:07","end":"06:07","startHours":5.112291483402812,"endHours":6.112291483402812,"planetary_lord":"Venus"},{"name":"Hora 2","start":"06:07","end":"07:07","startHours":6.112291483402812,"endHours":7.112291483402812,"planetary_lord":"Sun"},{"name":"Hora 3","start":"07:07","end":"08:07","startHours":7.112291483402812,"endHours":8.112291483402812,"planetary_lord":"Mars"},{"name":"Hora 4","start":"08:07","end":"09:07","startHours":8.112291483402812,"endHours":9.112291483402812,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"09:07","end":"10:07","startHours":9.112291483402812,"endHours":10.112291483402812,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"10:07","end":"11:07","startHours":10.112291483402812,"endHours":11.112291483402812,"planetary_lord":"Moon"},{"name":"Hora 7","start":"11:07","end":"12:07","startHours":11.112291483402812,"endHours":12.112291483402812,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"12:07","end":"13:07","startHours":12.112291483402812,"endHours":13.112291483402812,"planetary_lord":"Venus"},{"name":"Hora 9","start":"13:07","end":"14:07","startHours":13.112291483402812,"endHours":14.112291483402812,"planetary_lord":"Sun"},{"name":"Hora 10","start":"14:07","end":"15:07","startHours":14.112291483402812,"endHours":15.112291483402812,"planetary_lord":"Mars"},{"name":"Hora 11","start":"15:07","end":"16:07","startHours":15.112291483402812,"endHours":16.112291483402814,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"16:07","end":"17:07","startHours":16.112291483402814,"endHours":17.112291483402814,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"17:07","end":"18:07","startHours":17.112291483402814,"endHours":18.112291483402814,"planetary_lord":"Moon"},{"name":"Hora 14","start":"18:07","end":"19:07","startHours":18.112291483402814,"endHours":19.112291483402814,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"19:07","end":"20:07","startHours":19.112291483402814,"endHours":20.112291483402814,"planetary_lord":"Venus"},{"name":"Hora 16","start":"20:07","end":"21:07","startHours":20.112291483402814,"endHours":21.112291483402814,"planetary_lord":"Sun"},{"name":"Hora 17","start":"21:07","end":"22:07","startHours":21.112291483402814,"endHours":22.112291483402814,"planetary_lord":"Mars"},{"name":"Hora 18","start":"22:07","end":"23:07","startHours":22.112291483402814,"endHours":23.112291483402814,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"23:07","end":"00:07","startHours":23.112291483402814,"endHours":24.112291483402814,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"00:07","end":"01:07","startHours":24.112291483402814,"endHours":25.112291483402814,"planetary_lord":"Moon"},{"name":"Hora 21","start":"01:07","end":"02:07","startHours":25.112291483402814,"endHours":26.112291483402814,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"02:07","end":"03:07","startHours":26.112291483402814,"endHours":27.112291483402814,"planetary_lord":"Venus"},{"name":"Hora 23","start":"03:07","end":"04:07","startHours":27.112291483402814,"endHours":28.112291483402814,"planetary_lord":"Sun"},{"name":"Hora 24","start":"04:07","end":"05:07","startHours":28.112291483402814,"endHours":29.112291483402814,"planetary_lord":"Mars"}],"taraBala":{"favorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Uttara Phalgunī","Hasta","Citrā","Svātī","Viśākhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Tulā","Dhanu","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Makara","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"East","rahuVasa":"South-East","anandadiYoga":{"name":"Maitra","quality":"Auspicious"},"tropicalRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-23.38304186120252,"eotMinutes":2.787727348141232,"ayanamsa":23.9922}},"calendars":{"vikram_samvat":2066,"vikram_samvatsara":"Śubhakṛt","saka_samvat":1931,"saka_samvatsara":"Virodhi","bengali_samvat":1416,"malayalam_era":1185,"nanakshahi_year":540,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Pauṣa","lunar_month_amanta":"Pauṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Śukla Dvitīyā · Vikram 2066 Śubhakṛt · Śaka 1931 Virodhi"},"festivals":[],"todays_walk":{"walk":{"id":"shukra-walk","name":"Śukra Walk","name_sanskrit":"शुक्र यात्रा","type":"graha","description":"Beauty + creativity in dharma + BG 10.36.","step_count":5,"url":"/walk/shukra-walk"},"reason":"Śukravāra (Friday) — 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 December 18, 2009 CE · Perth, Australia · Vidhyamitra","description":"December 18, 2009 CE for Perth, Australia: Śukla Dvitīyā, sūryodaya 05:07, sūryāsta 19:21.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2009-12-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2009-12-18","sa":"https://sa.vidhyamitra.com/city/perth/2009-12-18","hi":"https://hi.vidhyamitra.com/city/perth/2009-12-18","x-default":"https://vidhyamitra.com/city/perth/2009-12-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-09-21T20:31:03.609Z","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":"2026-09-21T20:31:03.609Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-09-21T20:31:03.609Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"},"reader_local_antaryami":{"reader_geography":"Every reader enters from their own kṣetra anywhere on Bhūmi; no single city is the universal center.","purna_chain":["Hosted scripture","Named-tradition interpretation","Original Vidhyamitra contemplation","Bhūmi-born material medium","Vidhyamitra portal","Responsible reader in their own kṣetra"],"claim_boundary":"The legacy purna_chain field carries a source-to-reader sequence, not a revealed physical descent, universal cosmology, or proof that software is conscious.","antaryami_responsibility_formula":"Kṣīrodakaśāyī Viṣṇu = Paramātmā = Antaryāmī. Jīva desires. Prakṛti executes through guṇas. Paramātmā witnesses, permits, remembers, guides, and sustains. Bhagavān is the ultimate source.","source_anchors":[{"label":"BG 13.23","path":"/bhagavad-gita/13/23","meaning":"upadraṣṭā-anumantā · witness-permitter"},{"label":"BG 15.15","path":"/bhagavad-gita/15/15","meaning":"the Lord seated in every heart as memory, knowledge, and forgetting"},{"label":"BG 18.61","path":"/bhagavad-gita/18/61","meaning":"Īśvara seated in the heart of all beings"}],"nama_seal":"Hare Krishna Hare Krishna · Krishna Krishna Hare Hare · Hare Rama Hare Rama · Rama Rama Hare Hare"}}}