{"id":"vidhyamitra:city-day:perth:2174-02-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2174-02-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2174-02-13","date_display":"February 13, 2174 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":2174,"month":2,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2515140.770833,"kali_year":5275,"ahargana":1926675.2708,"sun":{"sidereal_longitude":297.8104,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":74.8008,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":136.9904,"elapsed_within_tithi_degrees":4.9904},"nakshatra":{"number":6,"name":"Ārdrā","pada":3,"moon_longitude":74.8008,"elapsed_within_degrees":8.1342},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":12.6112},"karana":{"half_tithi_index":22,"name":"Bava"},"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":2174,"month":2,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2515140.770833,"ahargana":1926675.2708,"kali_year":5275,"ayanamsa_lahiri":26.2853,"grahas":{"sun":{"sidereal_longitude":298.1401840000001,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":76.86388399999998,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":4},"retrograde":false,"latitude":4.4404},"mars":{"sidereal_longitude":205.626984,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":271.6265840000001,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":254.06798400000002,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":249.077184,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":342.723484,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":335.4723,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":155.4723,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","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":2174,"month":2,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2515140.770833,"kali_year":5275,"ahargana":1926675.2708,"sun":{"sidereal_longitude":297.8104,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":74.8008,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":136.9904,"elapsed_within_tithi_degrees":4.9904},"nakshatra":{"number":6,"name":"Ārdrā","pada":3,"moon_longitude":74.8008,"elapsed_within_degrees":8.1342},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":12.6112},"karana":{"half_tithi_index":22,"name":"Bava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.44,"elongation":136.99},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.44,"opposition_distance":43.01}},"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":"05:53","sunsetLocal":"19:09","solarNoonLocal":"12:31","dayLengthHours":13.2736175697296,"dayLengthDisplay":"13 Hours 16 Mins 25 Secs","nightLengthDisplay":"10 Hours 43 Mins 35 Secs","moonriseLocal":"16:44","moonsetLocal":"02:48","rahuKala":{"name":"Rāhu Kāla","start":"17:30","end":"19:09","startHours":17.496898676325635,"endHours":19.156100872541835,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:31","end":"14:11","startHours":12.519292087677034,"endHours":14.178494283893235,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:50","end":"17:30","startHours":15.837696480109434,"endHours":17.496898676325635,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:59","end":"09:25","startHours":8.97966073574914,"endHours":9.422114654740128,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:26","end":"06:47","startHours":6.435550701550968,"endHours":6.789513836743757,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:05","end":"12:58","startHours":12.076838168686047,"endHours":12.96174600666802,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:07","end":"05:00","startHours":4.112667626848288,"endHours":4.997575464830261,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:47","end":"05:53","startHours":4.776348505334768,"endHours":5.8824833028122345,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:44","end":"15:37","startHours":14.731561682631968,"endHours":15.616469520613942,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:57","end":"19:21","startHours":18.956100872541835,"endHours":19.356100872541834,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:09","end":"19:43","startHours":19.156100872541835,"endHours":19.709168271280568,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:54","end":"20:39","startHours":18.906100872541835,"endHours":20.656100872541835,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:05","end":"00:58","startHours":24.07683816868605,"endHours":24.96174600666802,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:53","end":"07:33","startHours":5.8824833028122345,"endHours":7.541685499028435,"quality":"inauspicious"},{"name":"Chala","start":"07:33","end":"09:12","startHours":7.541685499028435,"endHours":9.200887695244635,"quality":"neutral"},{"name":"Labha","start":"09:12","end":"10:52","startHours":9.200887695244635,"endHours":10.860089891460834,"quality":"auspicious"},{"name":"Amṛta","start":"10:52","end":"12:31","startHours":10.860089891460834,"endHours":12.519292087677034,"quality":"auspicious"},{"name":"Kāla","start":"12:31","end":"14:11","startHours":12.519292087677034,"endHours":14.178494283893235,"quality":"inauspicious"},{"name":"Śubha","start":"14:11","end":"15:50","startHours":14.178494283893235,"endHours":15.837696480109434,"quality":"auspicious"},{"name":"Roga","start":"15:50","end":"17:30","startHours":15.837696480109434,"endHours":17.496898676325635,"quality":"inauspicious"},{"name":"Udveg","start":"17:30","end":"19:09","startHours":17.496898676325635,"endHours":19.156100872541835,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"19:09","end":"20:30","startHours":19.156100872541835,"endHours":20.496898676325635,"quality":"auspicious"},{"name":"Roga","start":"20:30","end":"21:50","startHours":20.496898676325635,"endHours":21.837696480109436,"quality":"inauspicious"},{"name":"Udveg","start":"21:50","end":"23:11","startHours":21.837696480109436,"endHours":23.178494283893237,"quality":"inauspicious"},{"name":"Chala","start":"23:11","end":"00:31","startHours":23.178494283893237,"endHours":24.519292087677034,"quality":"neutral"},{"name":"Labha","start":"00:31","end":"01:52","startHours":24.519292087677034,"endHours":25.860089891460834,"quality":"auspicious"},{"name":"Amṛta","start":"01:52","end":"03:12","startHours":25.860089891460834,"endHours":27.200887695244635,"quality":"auspicious"},{"name":"Kāla","start":"03:12","end":"04:33","startHours":27.200887695244635,"endHours":28.541685499028432,"quality":"inauspicious"},{"name":"Śubha","start":"04:33","end":"05:53","startHours":28.541685499028432,"endHours":29.882483302812233,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:53","end":"06:53","startHours":5.8824833028122345,"endHours":6.8824833028122345,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:53","end":"07:53","startHours":6.8824833028122345,"endHours":7.8824833028122345,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:53","end":"08:53","startHours":7.8824833028122345,"endHours":8.882483302812235,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:53","end":"09:53","startHours":8.882483302812235,"endHours":9.882483302812235,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:53","end":"10:53","startHours":9.882483302812235,"endHours":10.882483302812235,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:53","end":"11:53","startHours":10.882483302812235,"endHours":11.882483302812235,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:53","end":"12:53","startHours":11.882483302812235,"endHours":12.882483302812235,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:53","end":"13:53","startHours":12.882483302812235,"endHours":13.882483302812235,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:53","end":"14:53","startHours":13.882483302812235,"endHours":14.882483302812235,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:53","end":"15:53","startHours":14.882483302812235,"endHours":15.882483302812235,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:53","end":"16:53","startHours":15.882483302812235,"endHours":16.882483302812233,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:53","end":"17:53","startHours":16.882483302812233,"endHours":17.882483302812233,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:53","end":"18:53","startHours":17.882483302812233,"endHours":18.882483302812233,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:53","end":"19:53","startHours":18.882483302812233,"endHours":19.882483302812233,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:53","end":"20:53","startHours":19.882483302812233,"endHours":20.882483302812233,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:53","end":"21:53","startHours":20.882483302812233,"endHours":21.882483302812233,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:53","end":"22:53","startHours":21.882483302812233,"endHours":22.882483302812233,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:53","end":"23:53","startHours":22.882483302812233,"endHours":23.882483302812233,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:53","end":"00:53","startHours":23.882483302812233,"endHours":24.882483302812233,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:53","end":"01:53","startHours":24.882483302812233,"endHours":25.882483302812233,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:53","end":"02:53","startHours":25.882483302812233,"endHours":26.882483302812233,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:53","end":"03:53","startHours":26.882483302812233,"endHours":27.882483302812233,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:53","end":"04:53","startHours":27.882483302812233,"endHours":28.882483302812233,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:53","end":"05:53","startHours":28.882483302812233,"endHours":29.882483302812233,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Punarvasu","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Uttara Phalgunī","Hasta","Citrā","Svātī","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Mithuna","Siṃha","Vṛścika","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Karka","Kanyā","Tulā","Makara","Kumbha"]},"dishaShool":"West (Paścim)","chandraVasa":"South","rahuVasa":"North-East","anandadiYoga":{"name":"Dhvānkṣa","quality":"Inauspicious"},"tropicalRitu":"Śiśira (Winter) (tropical)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-13.378646137307493,"eotMinutes":-14.599525260622107,"ayanamsa":26.2853}},"calendars":{"vikram_samvat":2231,"vikram_samvatsara":"Sarvajit","saka_samvat":2096,"saka_samvatsara":"Bhāva","bengali_samvat":1581,"malayalam_era":1350,"nanakshahi_year":705,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Māgha","lunar_month_amanta":"Māgha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Śukla Dvādaśī · Vikram 2231 Sarvajit · Śaka 2096 Bhāva"},"festivals":[],"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":[]},"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 13, 2174 CE · Perth, Australia · Vidhyamitra","description":"February 13, 2174 CE for Perth, Australia: Śukla Dvādaśī, sūryodaya 05:53, sūryāsta 19:09.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2174-02-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2174-02-13","sa":"https://sa.vidhyamitra.com/city/perth/2174-02-13","hi":"https://hi.vidhyamitra.com/city/perth/2174-02-13","x-default":"https://vidhyamitra.com/city/perth/2174-02-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T14:37:35.355Z","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":"2026-05-31T14:37:35.355Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T14:37:35.355Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}