{"id":"vidhyamitra:city-day:perth:2031-02-15:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2031-02-15","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2031-02-15","date_display":"February 15, 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":2,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2462912.770833,"kali_year":5132,"ahargana":1874447.2708,"sun":{"sidereal_longitude":301.8783,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":215.0597,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":23,"name":"Aṣṭamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Aṣṭamī","elongation_degrees":273.1814,"elapsed_within_tithi_degrees":9.1814},"nakshatra":{"number":17,"name":"Anurādhā","pada":1,"moon_longitude":215.0597,"elapsed_within_degrees":1.7263},"yoga":{"number":12,"name":"Dhruva","sum_longitude":156.938},"karana":{"half_tithi_index":45,"name":"Kaulava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"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":2,"day":15,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2462912.770833,"ahargana":1874447.2708,"kali_year":5132,"ayanamsa_lahiri":24.2878,"grahas":{"sun":{"sidereal_longitude":301.8539780000001,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":212.95497799999998,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","pada":4},"retrograde":false,"latitude":-0.6026},"mars":{"sidereal_longitude":198.19167800000002,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":297.135078,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":239.69527800000003,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":329.40797799999996,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":37.72397799999999,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":222.7631,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":42.7631,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":1},"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":2,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2462912.770833,"kali_year":5132,"ahargana":1874447.2708,"sun":{"sidereal_longitude":301.8783,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":215.0597,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":23,"name":"Aṣṭamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Aṣṭamī","elongation_degrees":273.1814,"elapsed_within_tithi_degrees":9.1814},"nakshatra":{"number":17,"name":"Anurādhā","pada":1,"moon_longitude":215.0597,"elapsed_within_degrees":1.7263},"yoga":{"number":12,"name":"Dhruva","sum_longitude":156.938},"karana":{"half_tithi_index":45,"name":"Kaulava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-0.603,"elongation":86.819},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-0.603,"opposition_distance":93.181}},"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":"05:54","sunsetLocal":"19:08","solarNoonLocal":"12:31","dayLengthHours":13.222124647927583,"dayLengthDisplay":"13 Hours 13 Mins 20 Secs","nightLengthDisplay":"10 Hours 46 Mins 40 Secs","moonriseLocal":"23:41","moonsetLocal":"13:30","rahuKala":{"name":"Rāhu Kāla","start":"09:13","end":"10:52","startHours":9.213286522141436,"endHours":10.866052103132382,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"14:10","end":"15:49","startHours":14.171583265114279,"endHours":15.824348846105227,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"05:54","end":"07:34","startHours":5.90775536015954,"endHours":7.560520941150488,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:00","end":"09:26","startHours":8.99291777800931,"endHours":9.433655266273561,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:28","end":"06:49","startHours":6.458677220489856,"endHours":6.811267211101258,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:05","end":"12:58","startHours":12.07808019585908,"endHours":12.959555172387585,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:09","end":"05:02","startHours":4.144805407102529,"endHours":5.026280383631034,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:48","end":"05:54","startHours":4.805911639498909,"endHours":5.90775536015954,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:43","end":"15:36","startHours":14.722505125444595,"endHours":15.6039801019731,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:56","end":"19:20","startHours":18.929880008087125,"endHours":19.329880008087123,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:08","end":"19:41","startHours":19.129880008087124,"endHours":19.68080186841744,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:53","end":"20:38","startHours":18.879880008087124,"endHours":20.629880008087124,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:05","end":"00:58","startHours":24.07808019585908,"endHours":24.95955517238759,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"05:54","end":"07:34","startHours":5.90775536015954,"endHours":7.560520941150488,"quality":"inauspicious"},{"name":"Śubha","start":"07:34","end":"09:13","startHours":7.560520941150488,"endHours":9.213286522141436,"quality":"auspicious"},{"name":"Roga","start":"09:13","end":"10:52","startHours":9.213286522141436,"endHours":10.866052103132382,"quality":"inauspicious"},{"name":"Udveg","start":"10:52","end":"12:31","startHours":10.866052103132382,"endHours":12.51881768412333,"quality":"inauspicious"},{"name":"Chala","start":"12:31","end":"14:10","startHours":12.51881768412333,"endHours":14.171583265114279,"quality":"neutral"},{"name":"Labha","start":"14:10","end":"15:49","startHours":14.171583265114279,"endHours":15.824348846105227,"quality":"auspicious"},{"name":"Amṛta","start":"15:49","end":"17:29","startHours":15.824348846105227,"endHours":17.477114427096176,"quality":"auspicious"},{"name":"Kāla","start":"17:29","end":"19:08","startHours":17.477114427096176,"endHours":19.129880008087124,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"19:08","end":"20:29","startHours":19.129880008087124,"endHours":20.477114427096176,"quality":"auspicious"},{"name":"Amṛta","start":"20:29","end":"21:49","startHours":20.477114427096176,"endHours":21.824348846105227,"quality":"auspicious"},{"name":"Kāla","start":"21:49","end":"23:10","startHours":21.824348846105227,"endHours":23.17158326511428,"quality":"inauspicious"},{"name":"Śubha","start":"23:10","end":"00:31","startHours":23.17158326511428,"endHours":24.518817684123334,"quality":"auspicious"},{"name":"Roga","start":"00:31","end":"01:52","startHours":24.518817684123334,"endHours":25.866052103132382,"quality":"inauspicious"},{"name":"Udveg","start":"01:52","end":"03:13","startHours":25.866052103132382,"endHours":27.213286522141438,"quality":"inauspicious"},{"name":"Chala","start":"03:13","end":"04:34","startHours":27.213286522141438,"endHours":28.56052094115049,"quality":"neutral"},{"name":"Labha","start":"04:34","end":"05:54","startHours":28.56052094115049,"endHours":29.90775536015954,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:54","end":"06:54","startHours":5.90775536015954,"endHours":6.90775536015954,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"06:54","end":"07:54","startHours":6.90775536015954,"endHours":7.90775536015954,"planetary_lord":"Moon"},{"name":"Hora 3","start":"07:54","end":"08:54","startHours":7.90775536015954,"endHours":8.907755360159541,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"08:54","end":"09:54","startHours":8.907755360159541,"endHours":9.907755360159541,"planetary_lord":"Venus"},{"name":"Hora 5","start":"09:54","end":"10:54","startHours":9.907755360159541,"endHours":10.907755360159541,"planetary_lord":"Sun"},{"name":"Hora 6","start":"10:54","end":"11:54","startHours":10.907755360159541,"endHours":11.907755360159541,"planetary_lord":"Mars"},{"name":"Hora 7","start":"11:54","end":"12:54","startHours":11.907755360159541,"endHours":12.907755360159541,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"12:54","end":"13:54","startHours":12.907755360159541,"endHours":13.907755360159541,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"13:54","end":"14:54","startHours":13.907755360159541,"endHours":14.907755360159541,"planetary_lord":"Moon"},{"name":"Hora 10","start":"14:54","end":"15:54","startHours":14.907755360159541,"endHours":15.907755360159541,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"15:54","end":"16:54","startHours":15.907755360159541,"endHours":16.90775536015954,"planetary_lord":"Venus"},{"name":"Hora 12","start":"16:54","end":"17:54","startHours":16.90775536015954,"endHours":17.90775536015954,"planetary_lord":"Sun"},{"name":"Hora 13","start":"17:54","end":"18:54","startHours":17.90775536015954,"endHours":18.90775536015954,"planetary_lord":"Mars"},{"name":"Hora 14","start":"18:54","end":"19:54","startHours":18.90775536015954,"endHours":19.90775536015954,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"19:54","end":"20:54","startHours":19.90775536015954,"endHours":20.90775536015954,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"20:54","end":"21:54","startHours":20.90775536015954,"endHours":21.90775536015954,"planetary_lord":"Moon"},{"name":"Hora 17","start":"21:54","end":"22:54","startHours":21.90775536015954,"endHours":22.90775536015954,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"22:54","end":"23:54","startHours":22.90775536015954,"endHours":23.90775536015954,"planetary_lord":"Venus"},{"name":"Hora 19","start":"23:54","end":"00:54","startHours":23.90775536015954,"endHours":24.90775536015954,"planetary_lord":"Sun"},{"name":"Hora 20","start":"00:54","end":"01:54","startHours":24.90775536015954,"endHours":25.90775536015954,"planetary_lord":"Mars"},{"name":"Hora 21","start":"01:54","end":"02:54","startHours":25.90775536015954,"endHours":26.90775536015954,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"02:54","end":"03:54","startHours":26.90775536015954,"endHours":27.90775536015954,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"03:54","end":"04:54","startHours":27.90775536015954,"endHours":28.90775536015954,"planetary_lord":"Moon"},{"name":"Hora 24","start":"04:54","end":"05:54","startHours":28.90775536015954,"endHours":29.90775536015954,"planetary_lord":"Mercury"}],"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":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Vṛścika","Makara"],"unfavorable_rashis":["Mithuna","Karka","Tulā","Dhanu","Kumbha","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"North-East","rahuVasa":"East","anandadiYoga":{"name":"Mānasa","quality":"Auspicious"},"drikRitu":"Śiśira (Winter)","vedicRitu":"Śiśira (Winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-12.802589077954988,"eotMinutes":-14.571061047399978,"ayanamsa":24.2878}},"calendars":{"vikram_samvat":2088,"vikram_samvatsara":"Raktākṣī","saka_samvat":1953,"saka_samvatsara":"Virodhakṛt","bengali_samvat":1438,"malayalam_era":1207,"nanakshahi_year":562,"lunar_month":"Phālguna","lunar_month_paksha_full":"Phālguna Kṛṣṇa Pakṣa","solar_month":"Kumbha (Māsi)","ritu":"Śiśira (Winter)","display_summary":"Phālguna Kṛṣṇa Aṣṭamī · Vikram 2088 Raktākṣī · Śaka 1953 Virodhakṛt"},"festivals":[{"id":"sitashtami","name":"Sītāṣṭamī","name_sanskrit":"सीताष्टमी","tradition":"Vaishnava","associated_deity":"Sītā Devī","significance":"Birth-anniversary of Sītā per Phālguna-Kṛṣṇa-Aṣṭamī tradition.","vrata":true,"detection":{"tithi_number":23,"tithi_paksha":"Kṛṣṇa","lunar_month":"Phālguna"},"precedence":3},{"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":"shani-walk","name":"Śani Walk","name_sanskrit":"शनि यात्रा","type":"graha","description":"Tapas + endurance + BG 17.14-19.","step_count":7,"url":"/walk/shani-walk"},"reason":"Śanivāra (Saturday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3226-07-09","event":"Bhagavān Krishna's birth at Mathurā","chart_id":"krishna","shared_marker":"same Kṛṣṇa Aṣṭamī","url":"/day/-3226-07-09","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 15, 2031 CE · Perth, Australia · Vidhyamitra","description":"February 15, 2031 CE for Perth, Australia: Kṛṣṇa Aṣṭamī, sūryodaya 05:54, sūryāsta 19:08.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2031-02-15","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2031-02-15","sa":"https://sa.vidhyamitra.com/city/perth/2031-02-15","hi":"https://hi.vidhyamitra.com/city/perth/2031-02-15","x-default":"https://vidhyamitra.com/city/perth/2031-02-15"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T18:26:50.299Z","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":"2026-05-14T18:26:50.299Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T18:26:50.299Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}