{"id":"vidhyamitra:city-day:perth:2020-07-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2020-07-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2020-07-18","date_display":"July 18, 2020 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":2020,"month":7,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2459048.770833,"kali_year":5122,"ahargana":1870583.2708,"sun":{"sidereal_longitude":91.2538,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":57.7145,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":326.4607,"elapsed_within_tithi_degrees":2.4607},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":2,"moon_longitude":57.7145,"elapsed_within_degrees":4.3812},"yoga":{"number":12,"name":"Dhruva","sum_longitude":148.9683},"karana":{"half_tithi_index":54,"name":"Gara"},"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":2020,"month":7,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2459048.770833,"ahargana":1870583.2708,"kali_year":5122,"ayanamsa_lahiri":24.14,"grahas":{"sun":{"sidereal_longitude":91.75311099999999,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":7,"name":"Punarvasu","pada":4},"retrograde":false},"moon":{"sidereal_longitude":58.676311,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":2},"retrograde":false,"latitude":-0.7638},"mars":{"sidereal_longitude":346.91781100000003,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":72.341411,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":267.7165110000001,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"retrograde":true},"venus":{"sidereal_longitude":49.07541100000003,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":274.69431099999997,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":true},"rahu":{"sidereal_longitude":67.4964,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":247.4964,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","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":2020,"month":7,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2459048.770833,"kali_year":5122,"ahargana":1870583.2708,"sun":{"sidereal_longitude":91.2538,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":57.7145,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":326.4607,"elapsed_within_tithi_degrees":2.4607},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":2,"moon_longitude":57.7145,"elapsed_within_degrees":4.3812},"yoga":{"number":12,"name":"Dhruva","sum_longitude":148.9683},"karana":{"half_tithi_index":54,"name":"Gara"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-0.764,"elongation":33.539},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-0.764,"opposition_distance":146.461}},"eclipse_window_40days":[{"offset_days":-13,"type":"lunar","occurs":true,"moon_latitude":-0.833,"opposition_distance":0.084}]},"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":"07:13","sunsetLocal":"17:31","solarNoonLocal":"12:22","dayLengthHours":10.30057849442099,"dayLengthDisplay":"10 Hours 18 Mins 02 Secs","nightLengthDisplay":"13 Hours 41 Mins 58 Secs","moonriseLocal":"05:09","moonsetLocal":"15:11","rahuKala":{"name":"Rāhu Kāla","start":"09:48","end":"11:05","startHours":9.798420645069903,"endHours":11.085992956872527,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:40","end":"14:57","startHours":13.661137580477774,"endHours":14.948709892280398,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:13","end":"08:31","startHours":7.223276021464655,"endHours":8.51084833326728,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:38","end":"09:58","startHours":9.626744336829553,"endHours":9.970096953310252,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:39","end":"07:56","startHours":7.65246679206553,"endHours":7.92714888525009,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:02","end":"12:43","startHours":12.030212652194452,"endHours":12.71691788515585,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:51","end":"06:32","startHours":5.849865555541856,"endHours":6.536570788503256,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:22","end":"07:13","startHours":6.364894480262906,"endHours":7.223276021464655,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:05","end":"14:47","startHours":14.090328351078648,"endHours":14.777033584040048,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:19","end":"17:43","startHours":17.323854515885646,"endHours":17.723854515885645,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:31","end":"17:57","startHours":17.523854515885645,"endHours":17.95304528648652,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:16","end":"19:01","startHours":17.273854515885645,"endHours":19.023854515885645,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:02","end":"00:43","startHours":24.03021265219445,"endHours":24.71691788515585,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"07:13","end":"08:31","startHours":7.223276021464655,"endHours":8.51084833326728,"quality":"inauspicious"},{"name":"Śubha","start":"08:31","end":"09:48","startHours":8.51084833326728,"endHours":9.798420645069903,"quality":"auspicious"},{"name":"Roga","start":"09:48","end":"11:05","startHours":9.798420645069903,"endHours":11.085992956872527,"quality":"inauspicious"},{"name":"Udveg","start":"11:05","end":"12:22","startHours":11.085992956872527,"endHours":12.37356526867515,"quality":"inauspicious"},{"name":"Chala","start":"12:22","end":"13:40","startHours":12.37356526867515,"endHours":13.661137580477774,"quality":"neutral"},{"name":"Labha","start":"13:40","end":"14:57","startHours":13.661137580477774,"endHours":14.948709892280398,"quality":"auspicious"},{"name":"Amṛta","start":"14:57","end":"16:14","startHours":14.948709892280398,"endHours":16.23628220408302,"quality":"auspicious"},{"name":"Kāla","start":"16:14","end":"17:31","startHours":16.23628220408302,"endHours":17.523854515885645,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"17:31","end":"19:14","startHours":17.523854515885645,"endHours":19.23628220408302,"quality":"auspicious"},{"name":"Amṛta","start":"19:14","end":"20:57","startHours":19.23628220408302,"endHours":20.948709892280398,"quality":"auspicious"},{"name":"Kāla","start":"20:57","end":"22:40","startHours":20.948709892280398,"endHours":22.661137580477774,"quality":"inauspicious"},{"name":"Śubha","start":"22:40","end":"00:22","startHours":22.661137580477774,"endHours":24.37356526867515,"quality":"auspicious"},{"name":"Roga","start":"00:22","end":"02:05","startHours":24.37356526867515,"endHours":26.085992956872527,"quality":"inauspicious"},{"name":"Udveg","start":"02:05","end":"03:48","startHours":26.085992956872527,"endHours":27.798420645069903,"quality":"inauspicious"},{"name":"Chala","start":"03:48","end":"05:31","startHours":27.798420645069903,"endHours":29.51084833326728,"quality":"neutral"},{"name":"Labha","start":"05:31","end":"07:13","startHours":29.51084833326728,"endHours":31.223276021464656,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:13","end":"08:13","startHours":7.223276021464655,"endHours":8.223276021464656,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"08:13","end":"09:13","startHours":8.223276021464656,"endHours":9.223276021464656,"planetary_lord":"Moon"},{"name":"Hora 3","start":"09:13","end":"10:13","startHours":9.223276021464656,"endHours":10.223276021464656,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"10:13","end":"11:13","startHours":10.223276021464656,"endHours":11.223276021464656,"planetary_lord":"Venus"},{"name":"Hora 5","start":"11:13","end":"12:13","startHours":11.223276021464656,"endHours":12.223276021464656,"planetary_lord":"Sun"},{"name":"Hora 6","start":"12:13","end":"13:13","startHours":12.223276021464656,"endHours":13.223276021464656,"planetary_lord":"Mars"},{"name":"Hora 7","start":"13:13","end":"14:13","startHours":13.223276021464656,"endHours":14.223276021464656,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"14:13","end":"15:13","startHours":14.223276021464656,"endHours":15.223276021464656,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"15:13","end":"16:13","startHours":15.223276021464656,"endHours":16.223276021464656,"planetary_lord":"Moon"},{"name":"Hora 10","start":"16:13","end":"17:13","startHours":16.223276021464656,"endHours":17.223276021464656,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"17:13","end":"18:13","startHours":17.223276021464656,"endHours":18.223276021464656,"planetary_lord":"Venus"},{"name":"Hora 12","start":"18:13","end":"19:13","startHours":18.223276021464656,"endHours":19.223276021464656,"planetary_lord":"Sun"},{"name":"Hora 13","start":"19:13","end":"20:13","startHours":19.223276021464656,"endHours":20.223276021464656,"planetary_lord":"Mars"},{"name":"Hora 14","start":"20:13","end":"21:13","startHours":20.223276021464656,"endHours":21.223276021464656,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"21:13","end":"22:13","startHours":21.223276021464656,"endHours":22.223276021464656,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"22:13","end":"23:13","startHours":22.223276021464656,"endHours":23.223276021464656,"planetary_lord":"Moon"},{"name":"Hora 17","start":"23:13","end":"00:13","startHours":23.223276021464656,"endHours":24.223276021464656,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"00:13","end":"01:13","startHours":24.223276021464656,"endHours":25.223276021464656,"planetary_lord":"Venus"},{"name":"Hora 19","start":"01:13","end":"02:13","startHours":25.223276021464656,"endHours":26.223276021464656,"planetary_lord":"Sun"},{"name":"Hora 20","start":"02:13","end":"03:13","startHours":26.223276021464656,"endHours":27.223276021464656,"planetary_lord":"Mars"},{"name":"Hora 21","start":"03:13","end":"04:13","startHours":27.223276021464656,"endHours":28.223276021464656,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"04:13","end":"05:13","startHours":28.223276021464656,"endHours":29.223276021464656,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"05:13","end":"06:13","startHours":29.223276021464656,"endHours":30.223276021464656,"planetary_lord":"Moon"},{"name":"Hora 24","start":"06:13","end":"07:13","startHours":30.223276021464656,"endHours":31.223276021464656,"planetary_lord":"Mercury"}],"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":["Vṛṣabha","Karka","Tulā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Siṃha","Kanyā","Dhanu","Makara"]},"dishaShool":"East (Pūrva)","chandraVasa":"South-East","rahuVasa":"East","anandadiYoga":{"name":"Ānanda","quality":"Auspicious"},"drikRitu":"Grīṣma (Summer)","vedicRitu":"Grīṣma (Summer)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":20.965406464433933,"eotMinutes":-5.85591612050904,"ayanamsa":24.14}},"calendars":{"vikram_samvat":2077,"vikram_samvatsara":"Pramādī","saka_samvat":1942,"saka_samvatsara":"Śārvarī","bengali_samvat":1427,"malayalam_era":1196,"nanakshahi_year":551,"lunar_month":"Śrāvaṇa","lunar_month_paksha_full":"Śrāvaṇa Kṛṣṇa Pakṣa","solar_month":"Karkaṭa (Āḍi)","ritu":"Varṣā (Monsoon)","display_summary":"Śrāvaṇa Kṛṣṇa Trayodaśī · Vikram 2077 Pramādī · Śaka 1942 Śārvarī"},"festivals":[{"id":"karka-sankranti","name":"Karka Saṅkrānti (Dakṣiṇāyana)","name_sanskrit":"कर्क सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Cancer; Dakṣiṇāyana (south-going) begins. Devatā-rātri begins.","vrata":true,"detection":{"sun_rashi":"Karka"},"precedence":2},{"id":"pradosha-vrata","name":"Pradoṣa Vrata","name_sanskrit":"प्रदोष व्रत","tradition":"Shaiva","associated_deity":"Śiva","significance":"Twilight worship of Śiva on Trayodaśī.","vrata":true,"detection":{"any_of":[{"tithi_number":13},{"tithi_number":28}]},"precedence":7}],"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 July 18, 2020 CE · Perth, Australia · Vidhyamitra","description":"July 18, 2020 CE for Perth, Australia: Kṛṣṇa Trayodaśī, sūryodaya 07:13, sūryāsta 17:31.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2020-07-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2020-07-18","sa":"https://sa.vidhyamitra.com/city/perth/2020-07-18","hi":"https://hi.vidhyamitra.com/city/perth/2020-07-18","x-default":"https://vidhyamitra.com/city/perth/2020-07-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-15T04:01:10.848Z","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":"2026-05-15T04:01:10.848Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-15T04:01:10.848Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}