{"id":"vidhyamitra:city-day:perth:1986-07-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1986-07-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1986-07-18","date_display":"July 18, 1986 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":1986,"month":7,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2446629.770833,"kali_year":5088,"ahargana":1858164.2708,"sun":{"sidereal_longitude":91.0621,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":226.2259,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":135.1638,"elapsed_within_tithi_degrees":3.1638},"nakshatra":{"number":17,"name":"Anurādhā","pada":4,"moon_longitude":226.2259,"elapsed_within_degrees":12.8926},"yoga":{"number":24,"name":"Śukla","sum_longitude":317.2881},"karana":{"half_tithi_index":22,"name":"Bava"},"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":1986,"month":7,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2446629.770833,"ahargana":1858164.2708,"kali_year":5088,"ayanamsa_lahiri":23.665,"grahas":{"sun":{"sidereal_longitude":91.47870799999998,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":7,"name":"Punarvasu","pada":4},"retrograde":false},"moon":{"sidereal_longitude":223.966408,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":4},"retrograde":false,"latitude":-2.9334},"mars":{"sidereal_longitude":261.960608,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":true},"mercury":{"sidereal_longitude":100.41490799999997,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":true},"jupiter":{"sidereal_longitude":329.966908,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":3},"retrograde":false},"venus":{"sidereal_longitude":133.694908,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":219.386708,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":5.5148,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":185.5148,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","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":"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":1986,"month":7,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2446629.770833,"kali_year":5088,"ahargana":1858164.2708,"sun":{"sidereal_longitude":91.0621,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":226.2259,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":135.1638,"elapsed_within_tithi_degrees":3.1638},"nakshatra":{"number":17,"name":"Anurādhā","pada":4,"moon_longitude":226.2259,"elapsed_within_degrees":12.8926},"yoga":{"number":24,"name":"Śukla","sum_longitude":317.2881},"karana":{"half_tithi_index":22,"name":"Bava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.933,"elongation":135.164},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.933,"opposition_distance":44.836}},"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":"07:14","sunsetLocal":"17:31","solarNoonLocal":"12:22","dayLengthHours":10.287245288856097,"dayLengthDisplay":"10 Hours 17 Mins 14 Secs","nightLengthDisplay":"13 Hours 42 Mins 46 Secs","moonriseLocal":"14:12","moonsetLocal":"04:13","rahuKala":{"name":"Rāhu Kāla","start":"11:05","end":"12:22","startHours":11.087659607568138,"endHours":12.37356526867515,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"14:57","end":"16:14","startHours":14.945376590889175,"endHours":16.231282251996188,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"08:31","end":"09:48","startHours":8.515848285354116,"endHours":9.801753946461128,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:38","end":"09:58","startHours":9.630299858313526,"endHours":9.973208034608728,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:40","end":"07:56","startHours":7.658577844616107,"endHours":7.93290438565227,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:02","end":"12:43","startHours":12.030657092379947,"endHours":12.716473444970354,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:51","end":"06:33","startHours":5.85830991906629,"endHours":6.544126271656697,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:22","end":"07:14","startHours":6.372672183509096,"endHours":7.229942624247103,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:05","end":"14:46","startHours":14.088106150151168,"endHours":14.773922502741573,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:19","end":"17:43","startHours":17.3171879131032,"endHours":17.7171879131032,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:31","end":"17:57","startHours":17.5171879131032,"endHours":17.945823133472203,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:16","end":"19:01","startHours":17.2671879131032,"endHours":19.0171879131032,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:02","end":"00:43","startHours":24.030657092379947,"endHours":24.716473444970354,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"07:14","end":"08:31","startHours":7.229942624247103,"endHours":8.515848285354116,"quality":"neutral"},{"name":"Labha","start":"08:31","end":"09:48","startHours":8.515848285354116,"endHours":9.801753946461128,"quality":"auspicious"},{"name":"Amṛta","start":"09:48","end":"11:05","startHours":9.801753946461128,"endHours":11.087659607568138,"quality":"auspicious"},{"name":"Kāla","start":"11:05","end":"12:22","startHours":11.087659607568138,"endHours":12.37356526867515,"quality":"inauspicious"},{"name":"Śubha","start":"12:22","end":"13:40","startHours":12.37356526867515,"endHours":13.659470929782163,"quality":"auspicious"},{"name":"Roga","start":"13:40","end":"14:57","startHours":13.659470929782163,"endHours":14.945376590889175,"quality":"inauspicious"},{"name":"Udveg","start":"14:57","end":"16:14","startHours":14.945376590889175,"endHours":16.231282251996188,"quality":"inauspicious"},{"name":"Chala","start":"16:14","end":"17:31","startHours":16.231282251996188,"endHours":17.5171879131032,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"17:31","end":"19:14","startHours":17.5171879131032,"endHours":19.231282251996188,"quality":"inauspicious"},{"name":"Udveg","start":"19:14","end":"20:57","startHours":19.231282251996188,"endHours":20.945376590889175,"quality":"inauspicious"},{"name":"Chala","start":"20:57","end":"22:40","startHours":20.945376590889175,"endHours":22.659470929782163,"quality":"neutral"},{"name":"Labha","start":"22:40","end":"00:22","startHours":22.659470929782163,"endHours":24.37356526867515,"quality":"auspicious"},{"name":"Amṛta","start":"00:22","end":"02:05","startHours":24.37356526867515,"endHours":26.087659607568142,"quality":"auspicious"},{"name":"Kāla","start":"02:05","end":"03:48","startHours":26.087659607568142,"endHours":27.801753946461126,"quality":"inauspicious"},{"name":"Śubha","start":"03:48","end":"05:31","startHours":27.801753946461126,"endHours":29.515848285354117,"quality":"auspicious"},{"name":"Roga","start":"05:31","end":"07:14","startHours":29.515848285354117,"endHours":31.2299426242471,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:14","end":"08:14","startHours":7.229942624247103,"endHours":8.229942624247103,"planetary_lord":"Venus"},{"name":"Hora 2","start":"08:14","end":"09:14","startHours":8.229942624247103,"endHours":9.229942624247103,"planetary_lord":"Sun"},{"name":"Hora 3","start":"09:14","end":"10:14","startHours":9.229942624247103,"endHours":10.229942624247103,"planetary_lord":"Mars"},{"name":"Hora 4","start":"10:14","end":"11:14","startHours":10.229942624247103,"endHours":11.229942624247103,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"11:14","end":"12:14","startHours":11.229942624247103,"endHours":12.229942624247103,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"12:14","end":"13:14","startHours":12.229942624247103,"endHours":13.229942624247103,"planetary_lord":"Moon"},{"name":"Hora 7","start":"13:14","end":"14:14","startHours":13.229942624247103,"endHours":14.229942624247103,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"14:14","end":"15:14","startHours":14.229942624247103,"endHours":15.229942624247103,"planetary_lord":"Venus"},{"name":"Hora 9","start":"15:14","end":"16:14","startHours":15.229942624247103,"endHours":16.2299426242471,"planetary_lord":"Sun"},{"name":"Hora 10","start":"16:14","end":"17:14","startHours":16.2299426242471,"endHours":17.2299426242471,"planetary_lord":"Mars"},{"name":"Hora 11","start":"17:14","end":"18:14","startHours":17.2299426242471,"endHours":18.2299426242471,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"18:14","end":"19:14","startHours":18.2299426242471,"endHours":19.2299426242471,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"19:14","end":"20:14","startHours":19.2299426242471,"endHours":20.2299426242471,"planetary_lord":"Moon"},{"name":"Hora 14","start":"20:14","end":"21:14","startHours":20.2299426242471,"endHours":21.2299426242471,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"21:14","end":"22:14","startHours":21.2299426242471,"endHours":22.2299426242471,"planetary_lord":"Venus"},{"name":"Hora 16","start":"22:14","end":"23:14","startHours":22.2299426242471,"endHours":23.2299426242471,"planetary_lord":"Sun"},{"name":"Hora 17","start":"23:14","end":"00:14","startHours":23.2299426242471,"endHours":24.2299426242471,"planetary_lord":"Mars"},{"name":"Hora 18","start":"00:14","end":"01:14","startHours":24.2299426242471,"endHours":25.2299426242471,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"01:14","end":"02:14","startHours":25.2299426242471,"endHours":26.2299426242471,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"02:14","end":"03:14","startHours":26.2299426242471,"endHours":27.2299426242471,"planetary_lord":"Moon"},{"name":"Hora 21","start":"03:14","end":"04:14","startHours":27.2299426242471,"endHours":28.2299426242471,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"04:14","end":"05:14","startHours":28.2299426242471,"endHours":29.2299426242471,"planetary_lord":"Venus"},{"name":"Hora 23","start":"05:14","end":"06:14","startHours":29.2299426242471,"endHours":30.2299426242471,"planetary_lord":"Sun"},{"name":"Hora 24","start":"06:14","end":"07:14","startHours":30.2299426242471,"endHours":31.2299426242471,"planetary_lord":"Mars"}],"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":"West (Paścim)","chandraVasa":"North-East","rahuVasa":"South-East","anandadiYoga":{"name":"Vajra","quality":"Inauspicious"},"tropicalRitu":"Grīṣma (Summer)","vedicRitu":"Grīṣma (Summer)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":21.10297784508873,"eotMinutes":-5.85591612050904,"ayanamsa":23.665}},"calendars":{"vikram_samvat":2043,"vikram_samvatsara":"Pramāthi","saka_samvat":1908,"saka_samvatsara":"Akṣaya","bengali_samvat":1393,"malayalam_era":1162,"nanakshahi_year":517,"lunar_month":"Āṣāḍha","lunar_month_paksha_full":"Āṣāḍha Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Āṣāḍha","lunar_month_amanta":"Āṣāḍha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Karkaṭa (Āḍi)","ritu":"Grīṣma (Summer)","display_summary":"Āṣāḍha Śukla Dvādaśī · Vikram 2043 Pramāthi · Śaka 1908 Akṣaya"},"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 July 18, 1986 CE · Perth, Australia · Vidhyamitra","description":"July 18, 1986 CE for Perth, Australia: Śukla Dvādaśī, sūryodaya 07:14, sūryāsta 17:31.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1986-07-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1986-07-18","sa":"https://sa.vidhyamitra.com/city/perth/1986-07-18","hi":"https://hi.vidhyamitra.com/city/perth/1986-07-18","x-default":"https://vidhyamitra.com/city/perth/1986-07-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T12:13:00.454Z","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":"2026-05-31T12:13:00.454Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T12:13:00.454Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}