{"id":"vidhyamitra:city-day:perth:2028-02-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2028-02-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2028-02-13","date_display":"February 13, 2028 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":2028,"month":2,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2461814.770833,"kali_year":5129,"ahargana":1873349.2708,"sun":{"sidereal_longitude":299.6191,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":151.5497,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":18,"name":"Tṛtīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Tṛtīyā","elongation_degrees":211.9306,"elapsed_within_tithi_degrees":7.9306},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2,"moon_longitude":151.5497,"elapsed_within_degrees":4.883},"yoga":{"number":7,"name":"Sukarma","sum_longitude":91.1687},"karana":{"half_tithi_index":35,"name":"Viṣṭi"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"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":2028,"month":2,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2461814.770833,"ahargana":1873349.2708,"kali_year":5129,"ayanamsa_lahiri":24.2458,"grahas":{"sun":{"sidereal_longitude":299.59973,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":153.86003000000005,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3},"retrograde":false,"latitude":-3.4763},"mars":{"sidereal_longitude":307.19803,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":279.42953,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":true},"jupiter":{"sidereal_longitude":151.53193,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":true},"venus":{"sidereal_longitude":341.90453,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":359.07653,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":280.9404,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":100.9404,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","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":2028,"month":2,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2461814.770833,"kali_year":5129,"ahargana":1873349.2708,"sun":{"sidereal_longitude":299.6191,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":151.5497,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":18,"name":"Tṛtīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Tṛtīyā","elongation_degrees":211.9306,"elapsed_within_tithi_degrees":7.9306},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2,"moon_longitude":151.5497,"elapsed_within_degrees":4.883},"yoga":{"number":7,"name":"Sukarma","sum_longitude":91.1687},"karana":{"half_tithi_index":35,"name":"Viṣṭi"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.476,"elongation":148.069},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.476,"opposition_distance":31.931}},"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":"05:52","sunsetLocal":"19:10","solarNoonLocal":"12:31","dayLengthHours":13.290870535751148,"dayLengthDisplay":"13 Hours 17 Mins 27 Secs","nightLengthDisplay":"10 Hours 42 Mins 33 Secs","moonriseLocal":"20:47","moonsetLocal":"08:49","rahuKala":{"name":"Rāhu Kāla","start":"17:30","end":"19:10","startHours":17.503368538583715,"endHours":19.164727355552607,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:31","end":"14:11","startHours":12.519292087677034,"endHours":14.180650904645926,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:51","end":"17:30","startHours":15.84200972161482,"endHours":17.503368538583715,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:59","end":"09:25","startHours":8.97505994481006,"endHours":9.418088962668431,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:26","end":"06:47","startHours":6.427643092124423,"endHours":6.782066306411121,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:05","end":"12:58","startHours":12.076263069818662,"endHours":12.962321105535406,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:06","end":"04:59","startHours":4.101740748367972,"endHours":4.987798784084715,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:46","end":"05:52","startHours":4.766284275155529,"endHours":5.873856819801459,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:44","end":"15:37","startHours":14.73443717696889,"endHours":15.620495212685634,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:58","end":"19:22","startHours":18.964727355552608,"endHours":19.364727355552606,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:10","end":"19:43","startHours":19.164727355552607,"endHours":19.71851362787557,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:55","end":"20:40","startHours":18.914727355552607,"endHours":20.664727355552607,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:05","end":"00:58","startHours":24.076263069818662,"endHours":24.962321105535406,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:52","end":"07:32","startHours":5.873856819801459,"endHours":7.535215636770352,"quality":"inauspicious"},{"name":"Chala","start":"07:32","end":"09:12","startHours":7.535215636770352,"endHours":9.196574453739245,"quality":"neutral"},{"name":"Labha","start":"09:12","end":"10:51","startHours":9.196574453739245,"endHours":10.85793327070814,"quality":"auspicious"},{"name":"Amṛta","start":"10:51","end":"12:31","startHours":10.85793327070814,"endHours":12.519292087677034,"quality":"auspicious"},{"name":"Kāla","start":"12:31","end":"14:11","startHours":12.519292087677034,"endHours":14.180650904645926,"quality":"inauspicious"},{"name":"Śubha","start":"14:11","end":"15:51","startHours":14.180650904645926,"endHours":15.84200972161482,"quality":"auspicious"},{"name":"Roga","start":"15:51","end":"17:30","startHours":15.84200972161482,"endHours":17.503368538583715,"quality":"inauspicious"},{"name":"Udveg","start":"17:30","end":"19:10","startHours":17.503368538583715,"endHours":19.164727355552607,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"19:10","end":"20:30","startHours":19.164727355552607,"endHours":20.503368538583715,"quality":"auspicious"},{"name":"Roga","start":"20:30","end":"21:51","startHours":20.503368538583715,"endHours":21.84200972161482,"quality":"inauspicious"},{"name":"Udveg","start":"21:51","end":"23:11","startHours":21.84200972161482,"endHours":23.180650904645926,"quality":"inauspicious"},{"name":"Chala","start":"23:11","end":"00:31","startHours":23.180650904645926,"endHours":24.519292087677034,"quality":"neutral"},{"name":"Labha","start":"00:31","end":"01:51","startHours":24.519292087677034,"endHours":25.857933270708138,"quality":"auspicious"},{"name":"Amṛta","start":"01:51","end":"03:12","startHours":25.857933270708138,"endHours":27.196574453739245,"quality":"auspicious"},{"name":"Kāla","start":"03:12","end":"04:32","startHours":27.196574453739245,"endHours":28.535215636770353,"quality":"inauspicious"},{"name":"Śubha","start":"04:32","end":"05:52","startHours":28.535215636770353,"endHours":29.87385681980146,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:52","end":"06:52","startHours":5.873856819801459,"endHours":6.873856819801459,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:52","end":"07:52","startHours":6.873856819801459,"endHours":7.873856819801459,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:52","end":"08:52","startHours":7.873856819801459,"endHours":8.873856819801459,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:52","end":"09:52","startHours":8.873856819801459,"endHours":9.873856819801459,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:52","end":"10:52","startHours":9.873856819801459,"endHours":10.873856819801459,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:52","end":"11:52","startHours":10.873856819801459,"endHours":11.873856819801459,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:52","end":"12:52","startHours":11.873856819801459,"endHours":12.873856819801459,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:52","end":"13:52","startHours":12.873856819801459,"endHours":13.873856819801459,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:52","end":"14:52","startHours":13.873856819801459,"endHours":14.873856819801459,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:52","end":"15:52","startHours":14.873856819801459,"endHours":15.873856819801459,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:52","end":"16:52","startHours":15.873856819801459,"endHours":16.87385681980146,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:52","end":"17:52","startHours":16.87385681980146,"endHours":17.87385681980146,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:52","end":"18:52","startHours":17.87385681980146,"endHours":18.87385681980146,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:52","end":"19:52","startHours":18.87385681980146,"endHours":19.87385681980146,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:52","end":"20:52","startHours":19.87385681980146,"endHours":20.87385681980146,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:52","end":"21:52","startHours":20.87385681980146,"endHours":21.87385681980146,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:52","end":"22:52","startHours":21.87385681980146,"endHours":22.87385681980146,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:52","end":"23:52","startHours":22.87385681980146,"endHours":23.87385681980146,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:52","end":"00:52","startHours":23.87385681980146,"endHours":24.87385681980146,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:52","end":"01:52","startHours":24.87385681980146,"endHours":25.87385681980146,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:52","end":"02:52","startHours":25.87385681980146,"endHours":26.87385681980146,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:52","end":"03:52","startHours":26.87385681980146,"endHours":27.87385681980146,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:52","end":"04:52","startHours":27.87385681980146,"endHours":28.87385681980146,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:52","end":"05:52","startHours":28.87385681980146,"endHours":29.87385681980146,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Hasta","Citrā","Svātī","Viśākhā","Anurādhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Mithuna","Karka","Kanyā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Tulā","Dhanu","Makara"]},"dishaShool":"West (Paścim)","chandraVasa":"North-West","rahuVasa":"North-East","anandadiYoga":{"name":"Maitra","quality":"Auspicious"},"drikRitu":"Śiśira (Winter) (Drik)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-13.570870119969829,"eotMinutes":-14.599525260622107,"ayanamsa":24.2458}},"calendars":{"vikram_samvat":2085,"vikram_samvatsara":"Durmati","saka_samvat":1950,"saka_samvatsara":"Kīlaka","bengali_samvat":1435,"malayalam_era":1204,"nanakshahi_year":559,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Kṛṣṇa Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Kṛṣṇa Tṛtīyā · Vikram 2085 Durmati · Śaka 1950 Kīlaka"},"festivals":[{"id":"makara-sankranti","name":"Makara Saṅkrānti (Uttarāyaṇa)","name_sanskrit":"मकर सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Capricorn; Uttarāyaṇa (north-going) begins. Bhīṣma's chosen mahaprasthāna time.","vrata":true,"detection":{"sun_rashi":"Makara"},"precedence":1,"sources":["Mahābhārata Bhīṣma-Stuti","Sūrya-Siddhānta"]},{"id":"pongal","name":"Pongal / Thai Pongal","name_sanskrit":"पोङ्गल","tradition":"Regional","associated_deity":"Sūrya Bhagavān","significance":"Tamil 4-day harvest festival; coincides with Makara Saṅkrānti.","vrata":false,"detection":{"sun_rashi":"Makara"},"precedence":2}],"todays_walk":{"walk":{"id":"surya-walk","name":"Sūrya Walk","name_sanskrit":"सूर्य यात्रा","type":"graha","description":"Self-illumination + BG 4.1 (Sun-lineage of Gītā transmission).","step_count":6,"url":"/walk/surya-walk"},"reason":"Ravivāra (Sunday) — 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 February 13, 2028 CE · Perth, Australia · Vidhyamitra","description":"February 13, 2028 CE for Perth, Australia: Kṛṣṇa Tṛtīyā, sūryodaya 05:52, sūryāsta 19:10.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2028-02-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2028-02-13","sa":"https://sa.vidhyamitra.com/city/perth/2028-02-13","hi":"https://hi.vidhyamitra.com/city/perth/2028-02-13","x-default":"https://vidhyamitra.com/city/perth/2028-02-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T16:32:38.367Z","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":"2026-05-14T16:32:38.367Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T16:32:38.367Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}