{"id":"vidhyamitra:city-day:perth:1870-05-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1870-05-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1870-05-18","date_display":"May 18, 1870 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":1870,"month":5,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2404200.770833,"kali_year":4972,"ahargana":1815735.2708,"sun":{"sidereal_longitude":35.0862,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":252.3473,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":217.2612,"elapsed_within_tithi_degrees":1.2612},"nakshatra":{"number":19,"name":"Mūla","pada":4,"moon_longitude":252.3473,"elapsed_within_degrees":12.3473},"yoga":{"number":22,"name":"Sādhya","sum_longitude":287.4335},"karana":{"half_tithi_index":36,"name":"Bava"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"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":1870,"month":5,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2404200.770833,"ahargana":1815735.2708,"kali_year":4972,"ayanamsa_lahiri":22.0423,"grahas":{"sun":{"sidereal_longitude":34.82770800000003,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":253.16600800000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":4},"retrograde":false,"latitude":1.6303},"mars":{"sidereal_longitude":22.263008000000013,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":56.767308000000014,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":41.70920799999999,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":1},"retrograde":false},"venus":{"sidereal_longitude":351.106508,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":246.31130800000005,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":93.6074,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":273.6074,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","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":1870,"month":5,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2404200.770833,"kali_year":4972,"ahargana":1815735.2708,"sun":{"sidereal_longitude":35.0862,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":252.3473,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":217.2612,"elapsed_within_tithi_degrees":1.2612},"nakshatra":{"number":19,"name":"Mūla","pada":4,"moon_longitude":252.3473,"elapsed_within_degrees":12.3473},"yoga":{"number":22,"name":"Sādhya","sum_longitude":287.4335},"karana":{"half_tithi_index":36,"name":"Bava"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.63,"elongation":142.739},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.63,"opposition_distance":37.261}},"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":"07:00","sunsetLocal":"17:26","solarNoonLocal":"12:13","dayLengthHours":10.445080380619821,"dayLengthDisplay":"10 Hours 26 Mins 42 Secs","nightLengthDisplay":"13 Hours 33 Mins 18 Secs","moonriseLocal":"19:41","moonsetLocal":"09:52","rahuKala":{"name":"Rāhu Kāla","start":"12:13","end":"13:31","startHours":12.214480296825506,"endHours":13.520115344402985,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"08:18","end":"09:36","startHours":8.297575154093074,"endHours":9.603210201670551,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:55","end":"12:13","startHours":10.908845249248028,"endHours":12.214480296825506,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:26","end":"09:47","startHours":9.42912552866022,"endHours":9.777294874680882,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:26","end":"07:42","startHours":7.427151789041422,"endHours":7.70568726585795,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:52","end":"12:34","startHours":11.866310950804845,"endHours":12.562649642846168,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:36","end":"06:18","startHours":5.599262722432953,"endHours":6.295601414474275,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:07","end":"07:00","startHours":6.121516741463944,"endHours":6.991940106515596,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:57","end":"14:39","startHours":13.95532702692881,"endHours":14.651665718970131,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:14","end":"17:38","startHours":17.237020487135418,"endHours":17.637020487135416,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:26","end":"17:52","startHours":17.437020487135417,"endHours":17.872232169661242,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:11","end":"18:56","startHours":17.187020487135417,"endHours":18.937020487135417,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:52","end":"00:34","startHours":23.866310950804845,"endHours":24.562649642846168,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"07:00","end":"08:18","startHours":6.991940106515596,"endHours":8.297575154093074,"quality":"auspicious"},{"name":"Amṛta","start":"08:18","end":"09:36","startHours":8.297575154093074,"endHours":9.603210201670551,"quality":"auspicious"},{"name":"Kāla","start":"09:36","end":"10:55","startHours":9.603210201670551,"endHours":10.908845249248028,"quality":"inauspicious"},{"name":"Śubha","start":"10:55","end":"12:13","startHours":10.908845249248028,"endHours":12.214480296825506,"quality":"auspicious"},{"name":"Roga","start":"12:13","end":"13:31","startHours":12.214480296825506,"endHours":13.520115344402985,"quality":"inauspicious"},{"name":"Udveg","start":"13:31","end":"14:50","startHours":13.520115344402985,"endHours":14.825750391980462,"quality":"inauspicious"},{"name":"Chala","start":"14:50","end":"16:08","startHours":14.825750391980462,"endHours":16.13138543955794,"quality":"neutral"},{"name":"Labha","start":"16:08","end":"17:26","startHours":16.13138543955794,"endHours":17.437020487135417,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"17:26","end":"19:08","startHours":17.437020487135417,"endHours":19.13138543955794,"quality":"inauspicious"},{"name":"Chala","start":"19:08","end":"20:50","startHours":19.13138543955794,"endHours":20.825750391980463,"quality":"neutral"},{"name":"Labha","start":"20:50","end":"22:31","startHours":20.825750391980463,"endHours":22.520115344402985,"quality":"auspicious"},{"name":"Amṛta","start":"22:31","end":"00:13","startHours":22.520115344402985,"endHours":24.214480296825506,"quality":"auspicious"},{"name":"Kāla","start":"00:13","end":"01:55","startHours":24.214480296825506,"endHours":25.908845249248028,"quality":"inauspicious"},{"name":"Śubha","start":"01:55","end":"03:36","startHours":25.908845249248028,"endHours":27.60321020167055,"quality":"auspicious"},{"name":"Roga","start":"03:36","end":"05:18","startHours":27.60321020167055,"endHours":29.297575154093074,"quality":"inauspicious"},{"name":"Udveg","start":"05:18","end":"07:00","startHours":29.297575154093074,"endHours":30.991940106515596,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:00","end":"08:00","startHours":6.991940106515596,"endHours":7.991940106515596,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"08:00","end":"09:00","startHours":7.991940106515596,"endHours":8.991940106515596,"planetary_lord":"Venus"},{"name":"Hora 3","start":"09:00","end":"10:00","startHours":8.991940106515596,"endHours":9.991940106515596,"planetary_lord":"Sun"},{"name":"Hora 4","start":"10:00","end":"11:00","startHours":9.991940106515596,"endHours":10.991940106515596,"planetary_lord":"Mars"},{"name":"Hora 5","start":"11:00","end":"12:00","startHours":10.991940106515596,"endHours":11.991940106515596,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"12:00","end":"13:00","startHours":11.991940106515596,"endHours":12.991940106515596,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"13:00","end":"14:00","startHours":12.991940106515596,"endHours":13.991940106515596,"planetary_lord":"Moon"},{"name":"Hora 8","start":"14:00","end":"15:00","startHours":13.991940106515596,"endHours":14.991940106515596,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"15:00","end":"16:00","startHours":14.991940106515596,"endHours":15.991940106515596,"planetary_lord":"Venus"},{"name":"Hora 10","start":"16:00","end":"17:00","startHours":15.991940106515596,"endHours":16.991940106515596,"planetary_lord":"Sun"},{"name":"Hora 11","start":"17:00","end":"18:00","startHours":16.991940106515596,"endHours":17.991940106515596,"planetary_lord":"Mars"},{"name":"Hora 12","start":"18:00","end":"19:00","startHours":17.991940106515596,"endHours":18.991940106515596,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"19:00","end":"20:00","startHours":18.991940106515596,"endHours":19.991940106515596,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"20:00","end":"21:00","startHours":19.991940106515596,"endHours":20.991940106515596,"planetary_lord":"Moon"},{"name":"Hora 15","start":"21:00","end":"22:00","startHours":20.991940106515596,"endHours":21.991940106515596,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"22:00","end":"23:00","startHours":21.991940106515596,"endHours":22.991940106515596,"planetary_lord":"Venus"},{"name":"Hora 17","start":"23:00","end":"00:00","startHours":22.991940106515596,"endHours":23.991940106515596,"planetary_lord":"Sun"},{"name":"Hora 18","start":"00:00","end":"01:00","startHours":23.991940106515596,"endHours":24.991940106515596,"planetary_lord":"Mars"},{"name":"Hora 19","start":"01:00","end":"02:00","startHours":24.991940106515596,"endHours":25.991940106515596,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"02:00","end":"03:00","startHours":25.991940106515596,"endHours":26.991940106515596,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"03:00","end":"04:00","startHours":26.991940106515596,"endHours":27.991940106515596,"planetary_lord":"Moon"},{"name":"Hora 22","start":"04:00","end":"05:00","startHours":27.991940106515596,"endHours":28.991940106515596,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"05:00","end":"06:00","startHours":28.991940106515596,"endHours":29.991940106515596,"planetary_lord":"Venus"},{"name":"Hora 24","start":"06:00","end":"07:00","startHours":29.991940106515596,"endHours":30.991940106515596,"planetary_lord":"Sun"}],"taraBala":{"favorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Svātī","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"unfavorable_nakshatras":["Aśvinī","Punarvasu","Puṣya","Aśleṣā","Maghā","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Bhādrapadā","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":"North (Uttara)","chandraVasa":"East","rahuVasa":"South-West","anandadiYoga":{"name":"Dhūmra","quality":"Inauspicious"},"tropicalRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":19.455472584370888,"eotMinutes":3.6891821904695723,"ayanamsa":22.0423}},"calendars":{"vikram_samvat":1927,"vikram_samvatsara":"Subhānu","saka_samvat":1792,"saka_samvatsara":"Pramoda","bengali_samvat":1277,"malayalam_era":1046,"nanakshahi_year":401,"lunar_month":"Jyeṣṭha","lunar_month_paksha_full":"Jyeṣṭha Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Jyeṣṭha","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":"Grīṣma (Summer)","display_summary":"Jyeṣṭha Kṛṣṇa Caturthī · Vikram 1927 Subhānu · Śaka 1792 Pramoda"},"festivals":[{"id":"sankashti-chaturthi","name":"Saṅkaṣṭī Caturthī","name_sanskrit":"सङ्कष्टी चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Gaṇeśa vrata.","vrata":true,"detection":{"tithi_number":19,"tithi_paksha":"Kṛṣṇa"},"precedence":6}],"todays_walk":{"walk":{"id":"budha-walk","name":"Budha Walk","name_sanskrit":"बुध यात्रा","type":"graha","description":"Discrimination + BG 2.41 (vyavasāyātmikā buddhi).","step_count":6,"url":"/walk/budha-walk"},"reason":"Budhavāra (Wednesday) — 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, 1870 CE · Perth, Australia · Vidhyamitra","description":"May 18, 1870 CE for Perth, Australia: Kṛṣṇa Caturthī, sūryodaya 07:00, sūryāsta 17:26.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1870-05-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1870-05-18","sa":"https://sa.vidhyamitra.com/city/perth/1870-05-18","hi":"https://hi.vidhyamitra.com/city/perth/1870-05-18","x-default":"https://vidhyamitra.com/city/perth/1870-05-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T09:34:31.492Z","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":"2026-06-02T09:34:31.492Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T09:34:31.492Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}