{"id":"vidhyamitra:city-day:perth:2017-02-20:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2017-02-20","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2017-02-20","date_display":"February 20, 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":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2457804.770833,"kali_year":5118,"ahargana":1869339.2708,"sun":{"sidereal_longitude":307.5785,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":230.9413,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":24,"name":"Navamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Navamī","elongation_degrees":283.3628,"elapsed_within_tithi_degrees":7.3628},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2,"moon_longitude":230.9413,"elapsed_within_degrees":4.2746},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":178.5198},"karana":{"half_tithi_index":47,"name":"Gara"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"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":20,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2457804.770833,"ahargana":1869339.2708,"kali_year":5118,"ayanamsa_lahiri":24.0924,"grahas":{"sun":{"sidereal_longitude":307.4961410000001,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":230.78804100000002,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2},"retrograde":false,"latitude":4.4611},"mars":{"sidereal_longitude":352.546241,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":295.59224100000006,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":178.26974100000007,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"retrograde":true},"venus":{"sidereal_longitude":346.04344100000003,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4},"retrograde":true},"saturn":{"sidereal_longitude":241.87934100000007,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":133.4095,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":313.4095,"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":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2457804.770833,"kali_year":5118,"ahargana":1869339.2708,"sun":{"sidereal_longitude":307.5785,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":230.9413,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":24,"name":"Navamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Navamī","elongation_degrees":283.3628,"elapsed_within_tithi_degrees":7.3628},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2,"moon_longitude":230.9413,"elapsed_within_degrees":4.2746},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":178.5198},"karana":{"half_tithi_index":47,"name":"Gara"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.461,"elongation":76.637},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.461,"opposition_distance":103.363}},"eclipse_window_40days":[{"offset_days":-9,"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":"05:59","sunsetLocal":"19:02","solarNoonLocal":"12:31","dayLengthHours":13.054876985142748,"dayLengthDisplay":"13 Hours 03 Mins 18 Secs","nightLengthDisplay":"10 Hours 56 Mins 42 Secs","moonriseLocal":"00:21","moonsetLocal":"14:27","rahuKala":{"name":"Rāhu Kāla","start":"07:37","end":"09:15","startHours":7.618443547983506,"endHours":9.25030317112635,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:53","end":"12:31","startHours":10.882162794269192,"endHours":12.514022417412036,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:09","end":"15:47","startHours":14.14588204055488,"endHours":15.777741663697723,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:02","end":"09:28","startHours":9.032721888040637,"endHours":9.467884454212061,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:32","end":"06:53","startHours":6.530537132554944,"endHours":6.878667185492084,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:05","end":"12:57","startHours":12.078859851240612,"endHours":12.94918498358346,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:15","end":"05:07","startHours":4.245933660154963,"endHours":5.1162587924978125,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:54","end":"05:59","startHours":4.898677509412099,"endHours":5.986583924840662,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:41","end":"15:34","startHours":14.689835248269162,"endHours":15.560160380612013,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:50","end":"19:14","startHours":18.84146090998341,"endHours":19.24146090998341,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:02","end":"19:35","startHours":19.04146090998341,"endHours":19.58541411769769,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:47","end":"20:32","startHours":18.79146090998341,"endHours":20.54146090998341,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:05","end":"00:57","startHours":24.078859851240612,"endHours":24.94918498358346,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"05:59","end":"07:37","startHours":5.986583924840662,"endHours":7.618443547983506,"quality":"auspicious"},{"name":"Kāla","start":"07:37","end":"09:15","startHours":7.618443547983506,"endHours":9.25030317112635,"quality":"inauspicious"},{"name":"Śubha","start":"09:15","end":"10:53","startHours":9.25030317112635,"endHours":10.882162794269192,"quality":"auspicious"},{"name":"Roga","start":"10:53","end":"12:31","startHours":10.882162794269192,"endHours":12.514022417412036,"quality":"inauspicious"},{"name":"Udveg","start":"12:31","end":"14:09","startHours":12.514022417412036,"endHours":14.14588204055488,"quality":"inauspicious"},{"name":"Chala","start":"14:09","end":"15:47","startHours":14.14588204055488,"endHours":15.777741663697723,"quality":"neutral"},{"name":"Labha","start":"15:47","end":"17:25","startHours":15.777741663697723,"endHours":17.409601286840566,"quality":"auspicious"},{"name":"Amṛta","start":"17:25","end":"19:02","startHours":17.409601286840566,"endHours":19.04146090998341,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"19:02","end":"20:25","startHours":19.04146090998341,"endHours":20.409601286840566,"quality":"neutral"},{"name":"Labha","start":"20:25","end":"21:47","startHours":20.409601286840566,"endHours":21.777741663697725,"quality":"auspicious"},{"name":"Amṛta","start":"21:47","end":"23:09","startHours":21.777741663697725,"endHours":23.14588204055488,"quality":"auspicious"},{"name":"Kāla","start":"23:09","end":"00:31","startHours":23.14588204055488,"endHours":24.514022417412036,"quality":"inauspicious"},{"name":"Śubha","start":"00:31","end":"01:53","startHours":24.514022417412036,"endHours":25.882162794269192,"quality":"auspicious"},{"name":"Roga","start":"01:53","end":"03:15","startHours":25.882162794269192,"endHours":27.250303171126347,"quality":"inauspicious"},{"name":"Udveg","start":"03:15","end":"04:37","startHours":27.250303171126347,"endHours":28.618443547983507,"quality":"inauspicious"},{"name":"Chala","start":"04:37","end":"05:59","startHours":28.618443547983507,"endHours":29.986583924840662,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"05:59","end":"06:59","startHours":5.986583924840662,"endHours":6.986583924840662,"planetary_lord":"Moon"},{"name":"Hora 2","start":"06:59","end":"07:59","startHours":6.986583924840662,"endHours":7.986583924840662,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"07:59","end":"08:59","startHours":7.986583924840662,"endHours":8.986583924840662,"planetary_lord":"Venus"},{"name":"Hora 4","start":"08:59","end":"09:59","startHours":8.986583924840662,"endHours":9.986583924840662,"planetary_lord":"Sun"},{"name":"Hora 5","start":"09:59","end":"10:59","startHours":9.986583924840662,"endHours":10.986583924840662,"planetary_lord":"Mars"},{"name":"Hora 6","start":"10:59","end":"11:59","startHours":10.986583924840662,"endHours":11.986583924840662,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"11:59","end":"12:59","startHours":11.986583924840662,"endHours":12.986583924840662,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"12:59","end":"13:59","startHours":12.986583924840662,"endHours":13.986583924840662,"planetary_lord":"Moon"},{"name":"Hora 9","start":"13:59","end":"14:59","startHours":13.986583924840662,"endHours":14.986583924840662,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"14:59","end":"15:59","startHours":14.986583924840662,"endHours":15.986583924840662,"planetary_lord":"Venus"},{"name":"Hora 11","start":"15:59","end":"16:59","startHours":15.986583924840662,"endHours":16.986583924840662,"planetary_lord":"Sun"},{"name":"Hora 12","start":"16:59","end":"17:59","startHours":16.986583924840662,"endHours":17.986583924840662,"planetary_lord":"Mars"},{"name":"Hora 13","start":"17:59","end":"18:59","startHours":17.986583924840662,"endHours":18.986583924840662,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"18:59","end":"19:59","startHours":18.986583924840662,"endHours":19.986583924840662,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"19:59","end":"20:59","startHours":19.986583924840662,"endHours":20.986583924840662,"planetary_lord":"Moon"},{"name":"Hora 16","start":"20:59","end":"21:59","startHours":20.986583924840662,"endHours":21.986583924840662,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"21:59","end":"22:59","startHours":21.986583924840662,"endHours":22.986583924840662,"planetary_lord":"Venus"},{"name":"Hora 18","start":"22:59","end":"23:59","startHours":22.986583924840662,"endHours":23.986583924840662,"planetary_lord":"Sun"},{"name":"Hora 19","start":"23:59","end":"00:59","startHours":23.986583924840662,"endHours":24.986583924840662,"planetary_lord":"Mars"},{"name":"Hora 20","start":"00:59","end":"01:59","startHours":24.986583924840662,"endHours":25.986583924840662,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"01:59","end":"02:59","startHours":25.986583924840662,"endHours":26.986583924840662,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"02:59","end":"03:59","startHours":26.986583924840662,"endHours":27.986583924840662,"planetary_lord":"Moon"},{"name":"Hora 23","start":"03:59","end":"04:59","startHours":27.986583924840662,"endHours":28.986583924840662,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"04:59","end":"05:59","startHours":28.986583924840662,"endHours":29.986583924840662,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"unfavorable_nakshatras":["Ārdrā","Punarvasu","Puṣya","Aśleṣā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Vṛścika","Makara"],"unfavorable_rashis":["Mithuna","Karka","Tulā","Dhanu","Kumbha","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"North-East","rahuVasa":"North-East","anandadiYoga":{"name":"Mausala","quality":"Inauspicious"},"drikRitu":"Śiśira (Winter) (Drik)","vedicRitu":"Śiśira (Winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-10.90850222141684,"eotMinutes":-14.28334504472219,"ayanamsa":24.0924}},"calendars":{"vikram_samvat":2074,"vikram_samvatsara":"Sādhāraṇa","saka_samvat":1939,"saka_samvatsara":"Hemalambī","bengali_samvat":1424,"malayalam_era":1193,"nanakshahi_year":548,"lunar_month":"Phālguna","lunar_month_paksha_full":"Phālguna Kṛṣṇa Pakṣa","solar_month":"Kumbha (Māsi)","ritu":"Śiśira (Winter)","display_summary":"Phālguna Kṛṣṇa Navamī · Vikram 2074 Sādhāraṇa · Śaka 1939 Hemalambī"},"festivals":[{"id":"kumbha-sankranti","name":"Kumbha Saṅkrānti","name_sanskrit":"कुम्भ सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Aquarius; Kumbha-māsa begins.","vrata":false,"detection":{"sun_rashi":"Kumbha"},"precedence":5}],"todays_walk":{"walk":{"id":"chandra-walk","name":"Candra Walk","name_sanskrit":"चन्द्र यात्रा","type":"graha","description":"Manas-control + BG 6.5-7.","step_count":5,"url":"/walk/chandra-walk"},"reason":"Somavāra (Monday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3137-10-20","event":"Karṇa-Vadha (Mahābhārata Day 17)","chart_id":"karna","shared_marker":"same Jyeṣṭhā","url":"/day/-3137-10-20","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 20, 2017 CE · Perth, Australia · Vidhyamitra","description":"February 20, 2017 CE for Perth, Australia: Kṛṣṇa Navamī, sūryodaya 05:59, sūryāsta 19:02.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2017-02-20","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2017-02-20","sa":"https://sa.vidhyamitra.com/city/perth/2017-02-20","hi":"https://hi.vidhyamitra.com/city/perth/2017-02-20","x-default":"https://vidhyamitra.com/city/perth/2017-02-20"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-15T07:01:14.048Z","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":"2026-05-15T07:01:14.048Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-15T07:01:14.048Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}