{"id":"vidhyamitra:city-day:perth:2031-06-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2031-06-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2031-06-13","date_display":"June 13, 2031 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":2031,"month":6,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2463030.770833,"kali_year":5133,"ahargana":1874565.2708,"sun":{"sidereal_longitude":57.3058,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":336.0163,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":24,"name":"Navamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Navamī","elongation_degrees":278.7105,"elapsed_within_tithi_degrees":2.7105},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1,"moon_longitude":336.0163,"elapsed_within_degrees":2.683},"yoga":{"number":3,"name":"Āyuṣmān","sum_longitude":33.3221},"karana":{"half_tithi_index":46,"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":2031,"month":6,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2463030.770833,"ahargana":1874565.2708,"kali_year":5133,"ayanamsa_lahiri":24.2923,"grahas":{"sun":{"sidereal_longitude":57.584168999999974,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":339.169969,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2},"retrograde":false,"latitude":3.9154},"mars":{"sidereal_longitude":189.69396900000004,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":1},"retrograde":true},"mercury":{"sidereal_longitude":62.362769000000014,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":240.10996899999998,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":true},"venus":{"sidereal_longitude":102.02376900000002,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":49.239169000000004,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":216.5109,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":36.5109,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","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":2031,"month":6,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2463030.770833,"kali_year":5133,"ahargana":1874565.2708,"sun":{"sidereal_longitude":57.3058,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":336.0163,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":24,"name":"Navamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Navamī","elongation_degrees":278.7105,"elapsed_within_tithi_degrees":2.7105},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1,"moon_longitude":336.0163,"elapsed_within_degrees":2.683},"yoga":{"number":3,"name":"Āyuṣmān","sum_longitude":33.3221},"karana":{"half_tithi_index":46,"name":"Taitila"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.915,"elongation":81.29},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.915,"opposition_distance":98.71}},"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":"17:19","solarNoonLocal":"12:16","dayLengthHours":10.081462981067078,"dayLengthDisplay":"10 Hours 04 Mins 53 Secs","nightLengthDisplay":"13 Hours 55 Mins 07 Secs","moonriseLocal":"01:03","moonsetLocal":"13:02","rahuKala":{"name":"Rāhu Kāla","start":"11:01","end":"12:16","startHours":11.012197467389932,"endHours":12.272380340023318,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"14:48","end":"16:03","startHours":14.792746085290087,"endHours":16.05292895792347,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"08:30","end":"09:45","startHours":8.491831722123163,"endHours":9.752014594756547,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:35","end":"09:55","startHours":9.583990211738763,"endHours":9.920038977774333,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:39","end":"07:55","startHours":7.65170980703424,"endHours":7.920548819862695,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:56","end":"12:37","startHours":11.936331573987749,"endHours":12.608429106058887,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:53","end":"06:34","startHours":5.887453785347501,"endHours":6.55955131741864,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:23","end":"07:14","startHours":6.391526934400854,"endHours":7.231648849489778,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:57","end":"14:37","startHours":13.952624170201164,"endHours":14.624721702272302,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:07","end":"17:31","startHours":17.113111830556857,"endHours":17.513111830556856,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:19","end":"17:44","startHours":17.313111830556856,"endHours":17.733172788101317,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:04","end":"18:49","startHours":17.063111830556856,"endHours":18.813111830556856,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:56","end":"00:37","startHours":23.936331573987747,"endHours":24.60842910605889,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"07:14","end":"08:30","startHours":7.231648849489778,"endHours":8.491831722123163,"quality":"neutral"},{"name":"Labha","start":"08:30","end":"09:45","startHours":8.491831722123163,"endHours":9.752014594756547,"quality":"auspicious"},{"name":"Amṛta","start":"09:45","end":"11:01","startHours":9.752014594756547,"endHours":11.012197467389932,"quality":"auspicious"},{"name":"Kāla","start":"11:01","end":"12:16","startHours":11.012197467389932,"endHours":12.272380340023318,"quality":"inauspicious"},{"name":"Śubha","start":"12:16","end":"13:32","startHours":12.272380340023318,"endHours":13.5325632126567,"quality":"auspicious"},{"name":"Roga","start":"13:32","end":"14:48","startHours":13.5325632126567,"endHours":14.792746085290087,"quality":"inauspicious"},{"name":"Udveg","start":"14:48","end":"16:03","startHours":14.792746085290087,"endHours":16.05292895792347,"quality":"inauspicious"},{"name":"Chala","start":"16:03","end":"17:19","startHours":16.05292895792347,"endHours":17.313111830556856,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"17:19","end":"19:03","startHours":17.313111830556856,"endHours":19.05292895792347,"quality":"inauspicious"},{"name":"Udveg","start":"19:03","end":"20:48","startHours":19.05292895792347,"endHours":20.792746085290087,"quality":"inauspicious"},{"name":"Chala","start":"20:48","end":"22:32","startHours":20.792746085290087,"endHours":22.5325632126567,"quality":"neutral"},{"name":"Labha","start":"22:32","end":"00:16","startHours":22.5325632126567,"endHours":24.272380340023318,"quality":"auspicious"},{"name":"Amṛta","start":"00:16","end":"02:01","startHours":24.272380340023318,"endHours":26.01219746738993,"quality":"auspicious"},{"name":"Kāla","start":"02:01","end":"03:45","startHours":26.01219746738993,"endHours":27.752014594756545,"quality":"inauspicious"},{"name":"Śubha","start":"03:45","end":"05:30","startHours":27.752014594756545,"endHours":29.491831722123163,"quality":"auspicious"},{"name":"Roga","start":"05:30","end":"07:14","startHours":29.491831722123163,"endHours":31.23164884948978,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:14","end":"08:14","startHours":7.231648849489778,"endHours":8.231648849489778,"planetary_lord":"Venus"},{"name":"Hora 2","start":"08:14","end":"09:14","startHours":8.231648849489778,"endHours":9.231648849489778,"planetary_lord":"Sun"},{"name":"Hora 3","start":"09:14","end":"10:14","startHours":9.231648849489778,"endHours":10.231648849489778,"planetary_lord":"Mars"},{"name":"Hora 4","start":"10:14","end":"11:14","startHours":10.231648849489778,"endHours":11.231648849489778,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"11:14","end":"12:14","startHours":11.231648849489778,"endHours":12.231648849489778,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"12:14","end":"13:14","startHours":12.231648849489778,"endHours":13.231648849489778,"planetary_lord":"Moon"},{"name":"Hora 7","start":"13:14","end":"14:14","startHours":13.231648849489778,"endHours":14.231648849489778,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"14:14","end":"15:14","startHours":14.231648849489778,"endHours":15.231648849489778,"planetary_lord":"Venus"},{"name":"Hora 9","start":"15:14","end":"16:14","startHours":15.231648849489778,"endHours":16.23164884948978,"planetary_lord":"Sun"},{"name":"Hora 10","start":"16:14","end":"17:14","startHours":16.23164884948978,"endHours":17.23164884948978,"planetary_lord":"Mars"},{"name":"Hora 11","start":"17:14","end":"18:14","startHours":17.23164884948978,"endHours":18.23164884948978,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"18:14","end":"19:14","startHours":18.23164884948978,"endHours":19.23164884948978,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"19:14","end":"20:14","startHours":19.23164884948978,"endHours":20.23164884948978,"planetary_lord":"Moon"},{"name":"Hora 14","start":"20:14","end":"21:14","startHours":20.23164884948978,"endHours":21.23164884948978,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"21:14","end":"22:14","startHours":21.23164884948978,"endHours":22.23164884948978,"planetary_lord":"Venus"},{"name":"Hora 16","start":"22:14","end":"23:14","startHours":22.23164884948978,"endHours":23.23164884948978,"planetary_lord":"Sun"},{"name":"Hora 17","start":"23:14","end":"00:14","startHours":23.23164884948978,"endHours":24.23164884948978,"planetary_lord":"Mars"},{"name":"Hora 18","start":"00:14","end":"01:14","startHours":24.23164884948978,"endHours":25.23164884948978,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"01:14","end":"02:14","startHours":25.23164884948978,"endHours":26.23164884948978,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"02:14","end":"03:14","startHours":26.23164884948978,"endHours":27.23164884948978,"planetary_lord":"Moon"},{"name":"Hora 21","start":"03:14","end":"04:14","startHours":27.23164884948978,"endHours":28.23164884948978,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"04:14","end":"05:14","startHours":28.23164884948978,"endHours":29.23164884948978,"planetary_lord":"Venus"},{"name":"Hora 23","start":"05:14","end":"06:14","startHours":29.23164884948978,"endHours":30.23164884948978,"planetary_lord":"Sun"},{"name":"Hora 24","start":"06:14","end":"07:14","startHours":30.23164884948978,"endHours":31.23164884948978,"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":["Vṛṣabha","Siṃha","Kanyā","Dhanu","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Karka","Tulā","Vṛścika","Kumbha"]},"dishaShool":"West (Paścim)","chandraVasa":"South-West","rahuVasa":"South-East","anandadiYoga":{"name":"Kāṇa","quality":"Inauspicious"},"drikRitu":"Grīṣma (Summer) (Drik)","vedicRitu":"Vasanta (Spring)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":23.187507550038486,"eotMinutes":0.2151795986009022,"ayanamsa":24.2923}},"calendars":{"vikram_samvat":2088,"vikram_samvatsara":"Raktākṣī","saka_samvat":1953,"saka_samvatsara":"Virodhakṛt","bengali_samvat":1438,"malayalam_era":1207,"nanakshahi_year":562,"lunar_month":"Jyeṣṭha","lunar_month_paksha_full":"Jyeṣṭha Kṛṣṇa Pakṣa","solar_month":"Vṛṣabha (Vaikāsi)","ritu":"Grīṣma (Summer)","display_summary":"Jyeṣṭha Kṛṣṇa Navamī · Vikram 2088 Raktākṣī · Śaka 1953 Virodhakṛt"},"festivals":[{"id":"vrishabha-sankranti","name":"Vṛṣabha Saṅkrānti","name_sanskrit":"वृषभ सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Taurus.","vrata":false,"detection":{"sun_rashi":"Vṛṣabha"},"precedence":5}],"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 June 13, 2031 CE · Perth, Australia · Vidhyamitra","description":"June 13, 2031 CE for Perth, Australia: Kṛṣṇa Navamī, sūryodaya 07:14, sūryāsta 17:19.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2031-06-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2031-06-13","sa":"https://sa.vidhyamitra.com/city/perth/2031-06-13","hi":"https://hi.vidhyamitra.com/city/perth/2031-06-13","x-default":"https://vidhyamitra.com/city/perth/2031-06-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-15T05:26:37.376Z","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":"2026-05-15T05:26:37.376Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-15T05:26:37.376Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}