{"id":"vidhyamitra:city-day:perth:-3136-02-15:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/-3136-02-15","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"-3136-02-15","date_display":"February 15, 3137 BCE","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":-3136,"month":2,"day":15,"hour":6,"minute":30,"second":0,"calendar":"julian"},"julian_day":575678.770833,"kali_year":-35,"ahargana":-12786.7292,"sun":{"sidereal_longitude":359.678,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":4.0616,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":1,"name":"Pratipada","paksha":"Śukla","full_name":"Śukla Pratipada","elongation_degrees":4.3836,"elapsed_within_tithi_degrees":4.3836},"nakshatra":{"number":1,"name":"Aśvinī","pada":2,"moon_longitude":4.0616,"elapsed_within_degrees":4.0616},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":3.7396},"karana":{"half_tithi_index":0,"name":"Kiṃstughna"},"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":-3136,"month":2,"day":15,"hour":6,"minute":30,"calendar":"julian"},"julian_day":575678.770833,"ahargana":-12786.7292,"kali_year":-35,"ayanamsa_lahiri":-47.8919,"grahas":{"sun":{"sidereal_longitude":359.678,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"moon":{"sidereal_longitude":4.0616,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false,"latitude":-3.2658},"mars":{"sidereal_longitude":102.7708,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":332.3129,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":16.8904,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2},"retrograde":false},"venus":{"sidereal_longitude":13.6526,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":290.4858,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":137.5024,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":317.5024,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","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":-3136,"month":2,"day":15,"hour":6,"minute":30,"second":0,"calendar":"julian"},"julian_day":575678.770833,"kali_year":-35,"ahargana":-12786.7292,"sun":{"sidereal_longitude":359.678,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":4.0616,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":1,"name":"Pratipada","paksha":"Śukla","full_name":"Śukla Pratipada","elongation_degrees":4.3836,"elapsed_within_tithi_degrees":4.3836},"nakshatra":{"number":1,"name":"Aśvinī","pada":2,"moon_longitude":4.0616,"elapsed_within_degrees":4.0616},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":3.7396},"karana":{"half_tithi_index":0,"name":"Kiṃstughna"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.266,"elongation":4.384},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.266,"opposition_distance":175.616}},"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":"05:42","sunsetLocal":"19:20","solarNoonLocal":"12:31","dayLengthHours":13.628906972771452,"dayLengthDisplay":"13 Hours 37 Mins 44 Secs","nightLengthDisplay":"10 Hours 22 Mins 16 Secs","moonriseLocal":"06:05","moonsetLocal":"19:33","rahuKala":{"name":"Rāhu Kāla","start":"17:38","end":"19:20","startHours":17.629657798912625,"endHours":19.333271170509057,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:31","end":"14:13","startHours":12.51881768412333,"endHours":14.222431055719763,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:56","end":"17:38","startHours":15.926044427316194,"endHours":17.629657798912625,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:53","end":"09:20","startHours":8.884442491384277,"endHours":9.33873939047666,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:16","end":"06:38","startHours":6.272235321603083,"endHours":6.635672840876989,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:04","end":"12:58","startHours":12.06452078503095,"endHours":12.973114583215715,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:53","end":"04:48","startHours":3.887176601368079,"endHours":4.7957703995528425,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:34","end":"05:42","startHours":4.568621950006651,"endHours":5.704364197737606,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:47","end":"15:42","startHours":14.790302179585241,"endHours":15.698895977770006,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:08","end":"19:32","startHours":19.133271170509058,"endHours":19.533271170509057,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:20","end":"19:54","startHours":19.333271170509057,"endHours":19.901142294374534,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:05","end":"20:50","startHours":19.083271170509057,"endHours":20.833271170509057,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:04","end":"00:58","startHours":24.064520785030954,"endHours":24.973114583215715,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:42","end":"07:24","startHours":5.704364197737606,"endHours":7.4079775693340375,"quality":"inauspicious"},{"name":"Chala","start":"07:24","end":"09:07","startHours":7.4079775693340375,"endHours":9.11159094093047,"quality":"neutral"},{"name":"Labha","start":"09:07","end":"10:49","startHours":9.11159094093047,"endHours":10.8152043125269,"quality":"auspicious"},{"name":"Amṛta","start":"10:49","end":"12:31","startHours":10.8152043125269,"endHours":12.51881768412333,"quality":"auspicious"},{"name":"Kāla","start":"12:31","end":"14:13","startHours":12.51881768412333,"endHours":14.222431055719763,"quality":"inauspicious"},{"name":"Śubha","start":"14:13","end":"15:56","startHours":14.222431055719763,"endHours":15.926044427316194,"quality":"auspicious"},{"name":"Roga","start":"15:56","end":"17:38","startHours":15.926044427316194,"endHours":17.629657798912625,"quality":"inauspicious"},{"name":"Udveg","start":"17:38","end":"19:20","startHours":17.629657798912625,"endHours":19.333271170509057,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"19:20","end":"20:38","startHours":19.333271170509057,"endHours":20.629657798912625,"quality":"auspicious"},{"name":"Roga","start":"20:38","end":"21:56","startHours":20.629657798912625,"endHours":21.926044427316196,"quality":"inauspicious"},{"name":"Udveg","start":"21:56","end":"23:13","startHours":21.926044427316196,"endHours":23.222431055719763,"quality":"inauspicious"},{"name":"Chala","start":"23:13","end":"00:31","startHours":23.222431055719763,"endHours":24.51881768412333,"quality":"neutral"},{"name":"Labha","start":"00:31","end":"01:49","startHours":24.51881768412333,"endHours":25.8152043125269,"quality":"auspicious"},{"name":"Amṛta","start":"01:49","end":"03:07","startHours":25.8152043125269,"endHours":27.11159094093047,"quality":"auspicious"},{"name":"Kāla","start":"03:07","end":"04:24","startHours":27.11159094093047,"endHours":28.407977569334037,"quality":"inauspicious"},{"name":"Śubha","start":"04:24","end":"05:42","startHours":28.407977569334037,"endHours":29.704364197737604,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:42","end":"06:42","startHours":5.704364197737606,"endHours":6.704364197737606,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:42","end":"07:42","startHours":6.704364197737606,"endHours":7.704364197737606,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:42","end":"08:42","startHours":7.704364197737606,"endHours":8.704364197737606,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:42","end":"09:42","startHours":8.704364197737606,"endHours":9.704364197737606,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:42","end":"10:42","startHours":9.704364197737606,"endHours":10.704364197737606,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:42","end":"11:42","startHours":10.704364197737606,"endHours":11.704364197737606,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:42","end":"12:42","startHours":11.704364197737606,"endHours":12.704364197737606,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:42","end":"13:42","startHours":12.704364197737606,"endHours":13.704364197737606,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:42","end":"14:42","startHours":13.704364197737606,"endHours":14.704364197737606,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:42","end":"15:42","startHours":14.704364197737606,"endHours":15.704364197737606,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:42","end":"16:42","startHours":15.704364197737606,"endHours":16.704364197737604,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:42","end":"17:42","startHours":16.704364197737604,"endHours":17.704364197737604,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:42","end":"18:42","startHours":17.704364197737604,"endHours":18.704364197737604,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:42","end":"19:42","startHours":18.704364197737604,"endHours":19.704364197737604,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:42","end":"20:42","startHours":19.704364197737604,"endHours":20.704364197737604,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:42","end":"21:42","startHours":20.704364197737604,"endHours":21.704364197737604,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:42","end":"22:42","startHours":21.704364197737604,"endHours":22.704364197737604,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:42","end":"23:42","startHours":22.704364197737604,"endHours":23.704364197737604,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:42","end":"00:42","startHours":23.704364197737604,"endHours":24.704364197737604,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:42","end":"01:42","startHours":24.704364197737604,"endHours":25.704364197737604,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:42","end":"02:42","startHours":25.704364197737604,"endHours":26.704364197737604,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:42","end":"03:42","startHours":26.704364197737604,"endHours":27.704364197737604,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:42","end":"04:42","startHours":27.704364197737604,"endHours":28.704364197737604,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:42","end":"05:42","startHours":28.704364197737604,"endHours":29.704364197737604,"planetary_lord":"Jupiter"}],"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":"West (Paścim)","chandraVasa":"East","rahuVasa":"North-East","anandadiYoga":{"name":"Ānanda","quality":"Auspicious"},"tropicalRitu":"Śiśira (Winter) (tropical)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-17.251363930738677,"eotMinutes":-14.571061047399978,"ayanamsa":-47.8919}},"calendars":{"vikram_samvat":-3079,"saka_samvat":-3214,"bengali_samvat":-3729,"malayalam_era":-3960,"nanakshahi_year":-4605,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Caitra","lunar_month_amanta":"Caitra","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mīna (Paṅkuṇi)","ritu":"Vasanta (Spring)","display_summary":"Caitra Śukla Pratipada · Vikram -3079 undefined · Śaka -3214 undefined"},"festivals":[{"id":"mesha-sankranti","name":"Meṣa Saṅkrānti (Vaiśākhī / Vishu / Pohelā Boishākh / Bihu)","name_sanskrit":"मेष सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Aries; solar new year. Regional: Vaiśākhī (Punjab) · Vishu (Kerala) · Pohelā Boishākh (Bengal) · Bihu (Assam) · Tamil Puthāṇḍu.","vrata":false,"detection":{"sun_rashi_ingress":"Meṣa"},"precedence":1},{"id":"chaitra-navratri-start","name":"Caitra Navrātri Start (Gudhi Padwā)","name_sanskrit":"चैत्र नवरात्रि आरम्भ","tradition":"Shakta","associated_deity":"Devī Durgā (9 forms over 9 nights)","significance":"Spring Navrātri begins; Vasanta-pakṣa Devī worship. Maharashtra: Gudhi Padwā. South: Ugadi. Sindhi: Cheti Chand.","vrata":true,"detection":{"tithi_number":1,"tithi_paksha":"Śukla","lunar_month":"Caitra"},"precedence":1},{"id":"baisakhi","name":"Baisakhi (Vaiśākhī)","name_sanskrit":"वैशाखी","tradition":"Regional","associated_deity":"Sūrya + Khalsa Pantha (Sikh)","significance":"Punjab New Year + Sikh Khalsa founding day.","vrata":false,"detection":{"sun_rashi_ingress":"Meṣa"},"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":[{"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":true,"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, 3137 BCE · Perth, Australia · Vidhyamitra","description":"February 15, 3137 BCE for Perth, Australia: Śukla Pratipada, sūryodaya 05:42, sūryāsta 19:20.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/-3136-02-15","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/-3136-02-15","sa":"https://sa.vidhyamitra.com/city/perth/-3136-02-15","hi":"https://hi.vidhyamitra.com/city/perth/-3136-02-15","x-default":"https://vidhyamitra.com/city/perth/-3136-02-15"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T13:07:57.760Z","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":"2026-06-01T13:07:57.760Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T13:07:57.760Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}