{"id":"vidhyamitra:city-day:perth:2170-05-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2170-05-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2170-05-18","date_display":"May 18, 2170 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":2170,"month":5,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2513773.770833,"kali_year":5272,"ahargana":1925308.2708,"sun":{"sidereal_longitude":30.6573,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":54.875,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":3,"name":"Tṛtīyā","paksha":"Śukla","full_name":"Śukla Tṛtīyā","elongation_degrees":24.2178,"elapsed_within_tithi_degrees":0.2178},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":1,"moon_longitude":54.875,"elapsed_within_degrees":1.5417},"yoga":{"number":7,"name":"Sukarma","sum_longitude":85.5323},"karana":{"half_tithi_index":4,"name":"Taitila"},"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":2170,"month":5,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2513773.770833,"ahargana":1925308.2708,"kali_year":5272,"ayanamsa_lahiri":26.233,"grahas":{"sun":{"sidereal_longitude":31.07901400000003,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":54.587514,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":1},"retrograde":false,"latitude":0.5457},"mars":{"sidereal_longitude":134.96061399999996,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":18.26541400000002,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":130.724014,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":68.94911400000001,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":307.758414,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":47.9026,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":227.9026,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","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":2170,"month":5,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2513773.770833,"kali_year":5272,"ahargana":1925308.2708,"sun":{"sidereal_longitude":30.6573,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":54.875,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":3,"name":"Tṛtīyā","paksha":"Śukla","full_name":"Śukla Tṛtīyā","elongation_degrees":24.2178,"elapsed_within_tithi_degrees":0.2178},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":1,"moon_longitude":54.875,"elapsed_within_degrees":1.5417},"yoga":{"number":7,"name":"Sukarma","sum_longitude":85.5323},"karana":{"half_tithi_index":4,"name":"Taitila"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":0.546,"elongation":24.218},"lunar":{"type":"lunar","occurs":false,"moon_latitude":0.546,"opposition_distance":155.782}},"eclipse_window_40days":[{"offset_days":-2,"type":"solar","occurs":true,"moon_latitude":-1.492,"elongation":0.119},{"offset_days":12,"type":"lunar","occurs":true,"moon_latitude":0.268,"opposition_distance":1.718}]},"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":"07:00","sunsetLocal":"17:26","solarNoonLocal":"12:13","dayLengthHours":10.43548464361855,"dayLengthDisplay":"10 Hours 26 Mins 08 Secs","nightLengthDisplay":"13 Hours 33 Mins 52 Secs","moonriseLocal":"08:46","moonsetLocal":"18:48","rahuKala":{"name":"Rāhu Kāla","start":"10:55","end":"12:13","startHours":10.91004471637319,"endHours":12.214480296825506,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"14:49","end":"16:08","startHours":14.823351457730144,"endHours":16.12778703818246,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"08:18","end":"09:36","startHours":8.301173555468552,"endHours":9.60560913592087,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:26","end":"09:47","startHours":9.43168439186056,"endHours":9.77953387998118,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:26","end":"07:43","startHours":7.431549835167005,"endHours":7.7098294256635,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:52","end":"12:34","startHours":11.866630808704889,"endHours":12.562329784946124,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:36","end":"06:18","startHours":5.60534002253376,"endHours":6.301038998774996,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:08","end":"07:00","startHours":6.127114254714687,"endHours":6.996737975016233,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:57","end":"14:39","startHours":13.953727737428599,"endHours":14.649426713669836,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:14","end":"17:38","startHours":17.232222618634783,"endHours":17.63222261863478,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:26","end":"17:52","startHours":17.432222618634782,"endHours":17.867034478785556,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:11","end":"18:56","startHours":17.182222618634782,"endHours":18.932222618634782,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:52","end":"00:34","startHours":23.866630808704887,"endHours":24.562329784946126,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"07:00","end":"08:18","startHours":6.996737975016233,"endHours":8.301173555468552,"quality":"neutral"},{"name":"Labha","start":"08:18","end":"09:36","startHours":8.301173555468552,"endHours":9.60560913592087,"quality":"auspicious"},{"name":"Amṛta","start":"09:36","end":"10:55","startHours":9.60560913592087,"endHours":10.91004471637319,"quality":"auspicious"},{"name":"Kāla","start":"10:55","end":"12:13","startHours":10.91004471637319,"endHours":12.214480296825506,"quality":"inauspicious"},{"name":"Śubha","start":"12:13","end":"13:31","startHours":12.214480296825506,"endHours":13.518915877277827,"quality":"auspicious"},{"name":"Roga","start":"13:31","end":"14:49","startHours":13.518915877277827,"endHours":14.823351457730144,"quality":"inauspicious"},{"name":"Udveg","start":"14:49","end":"16:08","startHours":14.823351457730144,"endHours":16.12778703818246,"quality":"inauspicious"},{"name":"Chala","start":"16:08","end":"17:26","startHours":16.12778703818246,"endHours":17.432222618634782,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"17:26","end":"19:08","startHours":17.432222618634782,"endHours":19.127787038182465,"quality":"inauspicious"},{"name":"Udveg","start":"19:08","end":"20:49","startHours":19.127787038182465,"endHours":20.823351457730144,"quality":"inauspicious"},{"name":"Chala","start":"20:49","end":"22:31","startHours":20.823351457730144,"endHours":22.518915877277827,"quality":"neutral"},{"name":"Labha","start":"22:31","end":"00:13","startHours":22.518915877277827,"endHours":24.214480296825506,"quality":"auspicious"},{"name":"Amṛta","start":"00:13","end":"01:55","startHours":24.214480296825506,"endHours":25.91004471637319,"quality":"auspicious"},{"name":"Kāla","start":"01:55","end":"03:36","startHours":25.91004471637319,"endHours":27.605609135920872,"quality":"inauspicious"},{"name":"Śubha","start":"03:36","end":"05:18","startHours":27.605609135920872,"endHours":29.30117355546855,"quality":"auspicious"},{"name":"Roga","start":"05:18","end":"07:00","startHours":29.30117355546855,"endHours":30.99673797501623,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:00","end":"08:00","startHours":6.996737975016233,"endHours":7.996737975016233,"planetary_lord":"Venus"},{"name":"Hora 2","start":"08:00","end":"09:00","startHours":7.996737975016233,"endHours":8.996737975016233,"planetary_lord":"Sun"},{"name":"Hora 3","start":"09:00","end":"10:00","startHours":8.996737975016233,"endHours":9.996737975016233,"planetary_lord":"Mars"},{"name":"Hora 4","start":"10:00","end":"11:00","startHours":9.996737975016233,"endHours":10.996737975016233,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"11:00","end":"12:00","startHours":10.996737975016233,"endHours":11.996737975016233,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"12:00","end":"13:00","startHours":11.996737975016233,"endHours":12.996737975016233,"planetary_lord":"Moon"},{"name":"Hora 7","start":"13:00","end":"14:00","startHours":12.996737975016233,"endHours":13.996737975016233,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"14:00","end":"15:00","startHours":13.996737975016233,"endHours":14.996737975016233,"planetary_lord":"Venus"},{"name":"Hora 9","start":"15:00","end":"16:00","startHours":14.996737975016233,"endHours":15.996737975016233,"planetary_lord":"Sun"},{"name":"Hora 10","start":"16:00","end":"17:00","startHours":15.996737975016233,"endHours":16.99673797501623,"planetary_lord":"Mars"},{"name":"Hora 11","start":"17:00","end":"18:00","startHours":16.99673797501623,"endHours":17.99673797501623,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"18:00","end":"19:00","startHours":17.99673797501623,"endHours":18.99673797501623,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"19:00","end":"20:00","startHours":18.99673797501623,"endHours":19.99673797501623,"planetary_lord":"Moon"},{"name":"Hora 14","start":"20:00","end":"21:00","startHours":19.99673797501623,"endHours":20.99673797501623,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"21:00","end":"22:00","startHours":20.99673797501623,"endHours":21.99673797501623,"planetary_lord":"Venus"},{"name":"Hora 16","start":"22:00","end":"23:00","startHours":21.99673797501623,"endHours":22.99673797501623,"planetary_lord":"Sun"},{"name":"Hora 17","start":"23:00","end":"00:00","startHours":22.99673797501623,"endHours":23.99673797501623,"planetary_lord":"Mars"},{"name":"Hora 18","start":"00:00","end":"01:00","startHours":23.99673797501623,"endHours":24.99673797501623,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"01:00","end":"02:00","startHours":24.99673797501623,"endHours":25.99673797501623,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"02:00","end":"03:00","startHours":25.99673797501623,"endHours":26.99673797501623,"planetary_lord":"Moon"},{"name":"Hora 21","start":"03:00","end":"04:00","startHours":26.99673797501623,"endHours":27.99673797501623,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"04:00","end":"05:00","startHours":27.99673797501623,"endHours":28.99673797501623,"planetary_lord":"Venus"},{"name":"Hora 23","start":"05:00","end":"06:00","startHours":28.99673797501623,"endHours":29.99673797501623,"planetary_lord":"Sun"},{"name":"Hora 24","start":"06:00","end":"07:00","startHours":29.99673797501623,"endHours":30.99673797501623,"planetary_lord":"Mars"}],"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":"West (Paścim)","chandraVasa":"South-East","rahuVasa":"South-East","anandadiYoga":{"name":"Rākṣasa","quality":"Inauspicious"},"tropicalRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":19.55680134770073,"eotMinutes":3.6891821904695723,"ayanamsa":26.233}},"calendars":{"vikram_samvat":2227,"vikram_samvatsara":"Subhānu","saka_samvat":2092,"saka_samvatsara":"Pramoda","bengali_samvat":1577,"malayalam_era":1346,"nanakshahi_year":701,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Vaiśākha","lunar_month_amanta":"Vaiśākha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Vṛṣabha (Vaikāsi)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha Śukla Tṛtīyā · Vikram 2227 Subhānu · Śaka 2092 Pramoda"},"festivals":[{"id":"akshaya-tritiya","name":"Akṣaya Tṛtīyā","name_sanskrit":"अक्षय तृतीया","tradition":"Pan-Hindu","significance":"\"Inexhaustible third\"; auspicious for any new venture.","vrata":false,"detection":{"tithi_number":3,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":1},{"id":"parashurama-jayanti","name":"Paraśurāma Jayantī","name_sanskrit":"परशुराम जयन्ती","tradition":"Vaishnava","associated_deity":"Paraśurāma (6th daśāvatāra of Krishna)","deity_avatara_index":16,"significance":"Paraśurāma's manifestation; ciranjīvi-pratiṣṭhā. Coincides with Akṣaya Tṛtīyā.","vrata":true,"detection":{"tithi_number":3,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":2,"sources":["Bhāgavata 9.15-16"]}],"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 May 18, 2170 CE · Perth, Australia · Vidhyamitra","description":"May 18, 2170 CE for Perth, Australia: Śukla Tṛtīyā, sūryodaya 07:00, sūryāsta 17:26.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2170-05-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2170-05-18","sa":"https://sa.vidhyamitra.com/city/perth/2170-05-18","hi":"https://hi.vidhyamitra.com/city/perth/2170-05-18","x-default":"https://vidhyamitra.com/city/perth/2170-05-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-30T23:56:43.575Z","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":"2026-05-30T23:56:43.575Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-30T23:56:43.575Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}