{"id":"vidhyamitra:city-day:perth:2025-02-04:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2025-02-04","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2025-02-04","date_display":"February 4, 2025 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":2025,"month":2,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2460710.770833,"kali_year":5126,"ahargana":1872245.2708,"sun":{"sidereal_longitude":291.2426,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":2.4942,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":6,"name":"Ṣaṣṭhī","paksha":"Śukla","full_name":"Śukla Ṣaṣṭhī","elongation_degrees":71.2517,"elapsed_within_tithi_degrees":11.2517},"nakshatra":{"number":1,"name":"Aśvinī","pada":1,"moon_longitude":2.4942,"elapsed_within_degrees":2.4942},"yoga":{"number":23,"name":"Śubha","sum_longitude":293.7368},"karana":{"half_tithi_index":11,"name":"Taitila"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"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":2025,"month":2,"day":4,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2460710.770833,"ahargana":1872245.2708,"kali_year":5126,"ayanamsa_lahiri":24.2036,"grahas":{"sun":{"sidereal_longitude":291.26471100000003,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4},"retrograde":false},"moon":{"sidereal_longitude":4.243610999999987,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false,"latitude":1.761},"mars":{"sidereal_longitude":85.04591099999999,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":2},"retrograde":true},"mercury":{"sidereal_longitude":286.999911,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":47.03031099999998,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":3},"retrograde":true},"venus":{"sidereal_longitude":335.252211,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":323.653511,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":339.4357,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":159.4357,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","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":2025,"month":2,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2460710.770833,"kali_year":5126,"ahargana":1872245.2708,"sun":{"sidereal_longitude":291.2426,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":2.4942,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":6,"name":"Ṣaṣṭhī","paksha":"Śukla","full_name":"Śukla Ṣaṣṭhī","elongation_degrees":71.2517,"elapsed_within_tithi_degrees":11.2517},"nakshatra":{"number":1,"name":"Aśvinī","pada":1,"moon_longitude":2.4942,"elapsed_within_degrees":2.4942},"yoga":{"number":23,"name":"Śubha","sum_longitude":293.7368},"karana":{"half_tithi_index":11,"name":"Taitila"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.761,"elongation":71.252},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.761,"opposition_distance":108.748}},"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":"05:45","sunsetLocal":"19:17","solarNoonLocal":"12:31","dayLengthHours":13.53040435006702,"dayLengthDisplay":"13 Hours 31 Mins 49 Secs","nightLengthDisplay":"10 Hours 28 Mins 11 Secs","moonriseLocal":"11:47","moonsetLocal":"22:58","rahuKala":{"name":"Rāhu Kāla","start":"15:54","end":"17:35","startHours":15.893429826983311,"endHours":17.58473037074169,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:08","end":"10:49","startHours":9.1282276519498,"endHours":10.819528195708179,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:31","end":"14:12","startHours":12.510828739466556,"endHours":14.202129283224933,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:54","end":"09:21","startHours":8.902720912782017,"endHours":9.353734391117584,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:19","end":"06:40","startHours":6.309393412352505,"endHours":6.670204195020959,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:04","end":"12:58","startHours":12.059815261130987,"endHours":12.961842217802124,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:56","end":"04:51","startHours":3.9415726510907767,"endHours":4.843599607761911,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:37","end":"05:45","startHours":4.618092868594127,"endHours":5.745626564433046,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:46","end":"15:40","startHours":14.765896131144393,"endHours":15.667923087815527,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:05","end":"19:29","startHours":19.076030914500066,"endHours":19.476030914500065,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:17","end":"19:50","startHours":19.276030914500065,"endHours":19.839797762419526,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:02","end":"20:47","startHours":19.026030914500065,"endHours":20.776030914500065,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:04","end":"00:58","startHours":24.059815261130986,"endHours":24.961842217802122,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"05:45","end":"07:26","startHours":5.745626564433046,"endHours":7.436927108191423,"quality":"inauspicious"},{"name":"Udveg","start":"07:26","end":"09:08","startHours":7.436927108191423,"endHours":9.1282276519498,"quality":"inauspicious"},{"name":"Chala","start":"09:08","end":"10:49","startHours":9.1282276519498,"endHours":10.819528195708179,"quality":"neutral"},{"name":"Labha","start":"10:49","end":"12:31","startHours":10.819528195708179,"endHours":12.510828739466556,"quality":"auspicious"},{"name":"Amṛta","start":"12:31","end":"14:12","startHours":12.510828739466556,"endHours":14.202129283224933,"quality":"auspicious"},{"name":"Kāla","start":"14:12","end":"15:54","startHours":14.202129283224933,"endHours":15.893429826983311,"quality":"inauspicious"},{"name":"Śubha","start":"15:54","end":"17:35","startHours":15.893429826983311,"endHours":17.58473037074169,"quality":"auspicious"},{"name":"Roga","start":"17:35","end":"19:17","startHours":17.58473037074169,"endHours":19.276030914500065,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"19:17","end":"20:35","startHours":19.276030914500065,"endHours":20.58473037074169,"quality":"inauspicious"},{"name":"Śubha","start":"20:35","end":"21:54","startHours":20.58473037074169,"endHours":21.89342982698331,"quality":"auspicious"},{"name":"Roga","start":"21:54","end":"23:12","startHours":21.89342982698331,"endHours":23.202129283224934,"quality":"inauspicious"},{"name":"Udveg","start":"23:12","end":"00:31","startHours":23.202129283224934,"endHours":24.510828739466554,"quality":"inauspicious"},{"name":"Chala","start":"00:31","end":"01:49","startHours":24.510828739466554,"endHours":25.81952819570818,"quality":"neutral"},{"name":"Labha","start":"01:49","end":"03:08","startHours":25.81952819570818,"endHours":27.1282276519498,"quality":"auspicious"},{"name":"Amṛta","start":"03:08","end":"04:26","startHours":27.1282276519498,"endHours":28.436927108191423,"quality":"auspicious"},{"name":"Kāla","start":"04:26","end":"05:45","startHours":28.436927108191423,"endHours":29.745626564433046,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:45","end":"06:45","startHours":5.745626564433046,"endHours":6.745626564433046,"planetary_lord":"Mars"},{"name":"Hora 2","start":"06:45","end":"07:45","startHours":6.745626564433046,"endHours":7.745626564433046,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"07:45","end":"08:45","startHours":7.745626564433046,"endHours":8.745626564433046,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"08:45","end":"09:45","startHours":8.745626564433046,"endHours":9.745626564433046,"planetary_lord":"Moon"},{"name":"Hora 5","start":"09:45","end":"10:45","startHours":9.745626564433046,"endHours":10.745626564433046,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"10:45","end":"11:45","startHours":10.745626564433046,"endHours":11.745626564433046,"planetary_lord":"Venus"},{"name":"Hora 7","start":"11:45","end":"12:45","startHours":11.745626564433046,"endHours":12.745626564433046,"planetary_lord":"Sun"},{"name":"Hora 8","start":"12:45","end":"13:45","startHours":12.745626564433046,"endHours":13.745626564433046,"planetary_lord":"Mars"},{"name":"Hora 9","start":"13:45","end":"14:45","startHours":13.745626564433046,"endHours":14.745626564433046,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"14:45","end":"15:45","startHours":14.745626564433046,"endHours":15.745626564433046,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"15:45","end":"16:45","startHours":15.745626564433046,"endHours":16.745626564433046,"planetary_lord":"Moon"},{"name":"Hora 12","start":"16:45","end":"17:45","startHours":16.745626564433046,"endHours":17.745626564433046,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"17:45","end":"18:45","startHours":17.745626564433046,"endHours":18.745626564433046,"planetary_lord":"Venus"},{"name":"Hora 14","start":"18:45","end":"19:45","startHours":18.745626564433046,"endHours":19.745626564433046,"planetary_lord":"Sun"},{"name":"Hora 15","start":"19:45","end":"20:45","startHours":19.745626564433046,"endHours":20.745626564433046,"planetary_lord":"Mars"},{"name":"Hora 16","start":"20:45","end":"21:45","startHours":20.745626564433046,"endHours":21.745626564433046,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"21:45","end":"22:45","startHours":21.745626564433046,"endHours":22.745626564433046,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"22:45","end":"23:45","startHours":22.745626564433046,"endHours":23.745626564433046,"planetary_lord":"Moon"},{"name":"Hora 19","start":"23:45","end":"00:45","startHours":23.745626564433046,"endHours":24.745626564433046,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"00:45","end":"01:45","startHours":24.745626564433046,"endHours":25.745626564433046,"planetary_lord":"Venus"},{"name":"Hora 21","start":"01:45","end":"02:45","startHours":25.745626564433046,"endHours":26.745626564433046,"planetary_lord":"Sun"},{"name":"Hora 22","start":"02:45","end":"03:45","startHours":26.745626564433046,"endHours":27.745626564433046,"planetary_lord":"Mars"},{"name":"Hora 23","start":"03:45","end":"04:45","startHours":27.745626564433046,"endHours":28.745626564433046,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"04:45","end":"05:45","startHours":28.745626564433046,"endHours":29.745626564433046,"planetary_lord":"Saturn"}],"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":["Meṣa","Mithuna","Kanyā","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Karka","Siṃha","Vṛścika","Dhanu","Mīna"]},"dishaShool":"North (Uttara)","chandraVasa":"East","rahuVasa":"North","anandadiYoga":{"name":"Vajra","quality":"Inauspicious"},"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":-16.196427100166762,"eotMinutes":-14.091724367993354,"ayanamsa":24.2036}},"calendars":{"vikram_samvat":2082,"vikram_samvatsara":"Kālayukta","saka_samvat":1947,"saka_samvatsara":"Viśvāvasu","bengali_samvat":1432,"malayalam_era":1201,"nanakshahi_year":556,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Śukla Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Śukla Ṣaṣṭhī · Vikram 2082 Kālayukta · Śaka 1947 Viśvāvasu"},"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":"mangala-walk","name":"Maṅgala Walk","name_sanskrit":"मङ्गल यात्रा","type":"graha","description":"Right action + BG 2.31-38 (kṣatriya-dharma).","step_count":7,"url":"/walk/mangala-walk"},"reason":"Maṅgalavāra (Tuesday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3101-02-18","event":"Kali Yuga Epoch","chart_id":"kali-yuga-epoch","shared_marker":"same Aśvinī","url":"/day/-3101-02-18","relevance":0.5}]},"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 4, 2025 CE · Perth, Australia · Vidhyamitra","description":"February 4, 2025 CE for Perth, Australia: Śukla Ṣaṣṭhī, sūryodaya 05:45, sūryāsta 19:17.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2025-02-04","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2025-02-04","sa":"https://sa.vidhyamitra.com/city/perth/2025-02-04","hi":"https://hi.vidhyamitra.com/city/perth/2025-02-04","x-default":"https://vidhyamitra.com/city/perth/2025-02-04"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T20:11:47.686Z","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":"2026-05-14T20:11:47.686Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T20:11:47.686Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}