{"id":"vidhyamitra:city-day:perth:2017-02-01:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2017-02-01","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2017-02-01","date_display":"February 1, 2017 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":2017,"month":2,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2457785.770833,"kali_year":5118,"ahargana":1869320.2708,"sun":{"sidereal_longitude":288.2507,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":337.9472,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":5,"name":"Pañcamī","paksha":"Śukla","full_name":"Śukla Pañcamī","elongation_degrees":49.6965,"elapsed_within_tithi_degrees":1.6965},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2,"moon_longitude":337.9472,"elapsed_within_degrees":4.6139},"yoga":{"number":20,"name":"Śiva","sum_longitude":266.198},"karana":{"half_tithi_index":8,"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":2017,"month":2,"day":1,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2457785.770833,"ahargana":1869320.2708,"kali_year":5118,"ayanamsa_lahiri":24.0917,"grahas":{"sun":{"sidereal_longitude":288.273467,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"moon":{"sidereal_longitude":337.654567,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2},"retrograde":false,"latitude":-1.7951},"mars":{"sidereal_longitude":338.486767,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":266.56856700000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":178.513467,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":333.55986699999994,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":240.33126700000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":134.4163,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":314.4163,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","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":2017,"month":2,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2457785.770833,"kali_year":5118,"ahargana":1869320.2708,"sun":{"sidereal_longitude":288.2507,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":337.9472,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":5,"name":"Pañcamī","paksha":"Śukla","full_name":"Śukla Pañcamī","elongation_degrees":49.6965,"elapsed_within_tithi_degrees":1.6965},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2,"moon_longitude":337.9472,"elapsed_within_degrees":4.6139},"yoga":{"number":20,"name":"Śiva","sum_longitude":266.198},"karana":{"half_tithi_index":8,"name":"Bava"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-1.795,"elongation":49.697},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-1.795,"opposition_distance":130.303}},"eclipse_window_40days":[{"offset_days":10,"type":"lunar","occurs":true,"moon_latitude":-1.052,"opposition_distance":1.908}]},"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":"05:42","sunsetLocal":"19:19","solarNoonLocal":"12:30","dayLengthHours":13.613732118729065,"dayLengthDisplay":"13 Hours 36 Mins 49 Secs","nightLengthDisplay":"10 Hours 23 Mins 11 Secs","moonriseLocal":"09:47","moonsetLocal":"21:49","rahuKala":{"name":"Rāhu Kāla","start":"12:30","end":"14:12","startHours":12.504122468623258,"endHours":14.205838983464393,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"07:24","end":"09:06","startHours":7.39897292409986,"endHours":9.100689438940993,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:48","end":"12:30","startHours":10.802405953782127,"endHours":12.504122468623258,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:52","end":"09:20","startHours":8.873793903628842,"endHours":9.327584974253144,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:16","end":"06:38","startHours":6.264495247539104,"endHours":6.627528104038546,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:03","end":"12:57","startHours":12.050331397998958,"endHours":12.957913539247562,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:53","end":"04:47","startHours":3.8820921267615183,"endHours":4.789674268010122,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:34","end":"05:42","startHours":4.562778732697971,"endHours":5.697256409258727,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:46","end":"15:41","startHours":14.77307782174477,"endHours":15.680659962993374,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:07","end":"19:31","startHours":19.110988527987793,"endHours":19.51098852798779,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:19","end":"19:53","startHours":19.310988527987792,"endHours":19.87822736626817,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:04","end":"20:49","startHours":19.060988527987792,"endHours":20.810988527987792,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:03","end":"00:57","startHours":24.050331397998956,"endHours":24.95791353924756,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"05:42","end":"07:24","startHours":5.697256409258727,"endHours":7.39897292409986,"quality":"auspicious"},{"name":"Amṛta","start":"07:24","end":"09:06","startHours":7.39897292409986,"endHours":9.100689438940993,"quality":"auspicious"},{"name":"Kāla","start":"09:06","end":"10:48","startHours":9.100689438940993,"endHours":10.802405953782127,"quality":"inauspicious"},{"name":"Śubha","start":"10:48","end":"12:30","startHours":10.802405953782127,"endHours":12.504122468623258,"quality":"auspicious"},{"name":"Roga","start":"12:30","end":"14:12","startHours":12.504122468623258,"endHours":14.205838983464393,"quality":"inauspicious"},{"name":"Udveg","start":"14:12","end":"15:54","startHours":14.205838983464393,"endHours":15.907555498305527,"quality":"inauspicious"},{"name":"Chala","start":"15:54","end":"17:37","startHours":15.907555498305527,"endHours":17.609272013146658,"quality":"neutral"},{"name":"Labha","start":"17:37","end":"19:19","startHours":17.609272013146658,"endHours":19.310988527987792,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"19:19","end":"20:37","startHours":19.310988527987792,"endHours":20.609272013146658,"quality":"inauspicious"},{"name":"Chala","start":"20:37","end":"21:54","startHours":20.609272013146658,"endHours":21.907555498305527,"quality":"neutral"},{"name":"Labha","start":"21:54","end":"23:12","startHours":21.907555498305527,"endHours":23.205838983464393,"quality":"auspicious"},{"name":"Amṛta","start":"23:12","end":"00:30","startHours":23.205838983464393,"endHours":24.504122468623258,"quality":"auspicious"},{"name":"Kāla","start":"00:30","end":"01:48","startHours":24.504122468623258,"endHours":25.802405953782127,"quality":"inauspicious"},{"name":"Śubha","start":"01:48","end":"03:06","startHours":25.802405953782127,"endHours":27.100689438940993,"quality":"auspicious"},{"name":"Roga","start":"03:06","end":"04:24","startHours":27.100689438940993,"endHours":28.39897292409986,"quality":"inauspicious"},{"name":"Udveg","start":"04:24","end":"05:42","startHours":28.39897292409986,"endHours":29.697256409258728,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:42","end":"06:42","startHours":5.697256409258727,"endHours":6.697256409258727,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"06:42","end":"07:42","startHours":6.697256409258727,"endHours":7.697256409258727,"planetary_lord":"Venus"},{"name":"Hora 3","start":"07:42","end":"08:42","startHours":7.697256409258727,"endHours":8.697256409258728,"planetary_lord":"Sun"},{"name":"Hora 4","start":"08:42","end":"09:42","startHours":8.697256409258728,"endHours":9.697256409258728,"planetary_lord":"Mars"},{"name":"Hora 5","start":"09:42","end":"10:42","startHours":9.697256409258728,"endHours":10.697256409258728,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"10:42","end":"11:42","startHours":10.697256409258728,"endHours":11.697256409258728,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"11:42","end":"12:42","startHours":11.697256409258728,"endHours":12.697256409258728,"planetary_lord":"Moon"},{"name":"Hora 8","start":"12:42","end":"13:42","startHours":12.697256409258728,"endHours":13.697256409258728,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"13:42","end":"14:42","startHours":13.697256409258728,"endHours":14.697256409258728,"planetary_lord":"Venus"},{"name":"Hora 10","start":"14:42","end":"15:42","startHours":14.697256409258728,"endHours":15.697256409258728,"planetary_lord":"Sun"},{"name":"Hora 11","start":"15:42","end":"16:42","startHours":15.697256409258728,"endHours":16.697256409258728,"planetary_lord":"Mars"},{"name":"Hora 12","start":"16:42","end":"17:42","startHours":16.697256409258728,"endHours":17.697256409258728,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"17:42","end":"18:42","startHours":17.697256409258728,"endHours":18.697256409258728,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"18:42","end":"19:42","startHours":18.697256409258728,"endHours":19.697256409258728,"planetary_lord":"Moon"},{"name":"Hora 15","start":"19:42","end":"20:42","startHours":19.697256409258728,"endHours":20.697256409258728,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"20:42","end":"21:42","startHours":20.697256409258728,"endHours":21.697256409258728,"planetary_lord":"Venus"},{"name":"Hora 17","start":"21:42","end":"22:42","startHours":21.697256409258728,"endHours":22.697256409258728,"planetary_lord":"Sun"},{"name":"Hora 18","start":"22:42","end":"23:42","startHours":22.697256409258728,"endHours":23.697256409258728,"planetary_lord":"Mars"},{"name":"Hora 19","start":"23:42","end":"00:42","startHours":23.697256409258728,"endHours":24.697256409258728,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"00:42","end":"01:42","startHours":24.697256409258728,"endHours":25.697256409258728,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"01:42","end":"02:42","startHours":25.697256409258728,"endHours":26.697256409258728,"planetary_lord":"Moon"},{"name":"Hora 22","start":"02:42","end":"03:42","startHours":26.697256409258728,"endHours":27.697256409258728,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"03:42","end":"04:42","startHours":27.697256409258728,"endHours":28.697256409258728,"planetary_lord":"Venus"},{"name":"Hora 24","start":"04:42","end":"05:42","startHours":28.697256409258728,"endHours":29.697256409258728,"planetary_lord":"Sun"}],"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":"North (Uttara)","chandraVasa":"South-West","rahuVasa":"South-West","anandadiYoga":{"name":"Mudgara","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":-17.08982915390077,"eotMinutes":-13.689348117395623,"ayanamsa":24.0917}},"calendars":{"vikram_samvat":2074,"vikram_samvatsara":"Sādhāraṇa","saka_samvat":1939,"saka_samvatsara":"Hemalambī","bengali_samvat":1424,"malayalam_era":1193,"nanakshahi_year":548,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Śukla Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Śukla Pañcamī · Vikram 2074 Sādhāraṇa · Śaka 1939 Hemalambī"},"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":"sarasvati-jayanti","name":"Sarasvatī Jayantī (Vasanta Pañchamī)","name_sanskrit":"सरस्वती जयन्ती / वसन्त पञ्चमी","tradition":"Pan-Hindu","associated_deity":"Sarasvatī (Vāk-tattva)","significance":"Manifestation of Devī Sarasvatī; vidyā-ārambha day; vasanta-ṛtu begins.","vrata":true,"detection":{"tithi_number":5,"tithi_paksha":"Śukla","lunar_month":"Māgha"},"precedence":2,"sources":["Skanda Purāṇa","Devī Bhāgavata"]},{"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":"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 February 1, 2017 CE · Perth, Australia · Vidhyamitra","description":"February 1, 2017 CE for Perth, Australia: Śukla Pañcamī, sūryodaya 05:42, sūryāsta 19:19.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2017-02-01","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2017-02-01","sa":"https://sa.vidhyamitra.com/city/perth/2017-02-01","hi":"https://hi.vidhyamitra.com/city/perth/2017-02-01","x-default":"https://vidhyamitra.com/city/perth/2017-02-01"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-15T02:35:37.186Z","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":"2026-05-15T02:35:37.186Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-15T02:35:37.186Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}