{"id":"vidhyamitra:city-day:perth:2171-01-16:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2171-01-16","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2171-01-16","date_display":"January 16, 2171 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":2171,"month":1,"day":16,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2514016.770833,"kali_year":5272,"ahargana":1925551.2708,"sun":{"sidereal_longitude":268.9342,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":19.0775,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":10,"name":"Daśamī","paksha":"Śukla","full_name":"Śukla Daśamī","elongation_degrees":110.1433,"elapsed_within_tithi_degrees":2.1433},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2,"moon_longitude":19.0775,"elapsed_within_degrees":5.7442},"yoga":{"number":22,"name":"Sādhya","sum_longitude":288.0117},"karana":{"half_tithi_index":18,"name":"Taitila"},"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":2171,"month":1,"day":16,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2514016.770833,"ahargana":1925551.2708,"kali_year":5272,"ayanamsa_lahiri":26.2423,"grahas":{"sun":{"sidereal_longitude":269.462129,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":19.289828999999997,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2},"retrograde":false,"latitude":-1.2354},"mars":{"sidereal_longitude":289.6481289999999,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":266.61082899999997,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":170.04692899999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"venus":{"sidereal_longitude":226.54262900000003,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":306.11722899999995,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":35.0273,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":215.0273,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","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":2171,"month":1,"day":16,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2514016.770833,"kali_year":5272,"ahargana":1925551.2708,"sun":{"sidereal_longitude":268.9342,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":19.0775,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":10,"name":"Daśamī","paksha":"Śukla","full_name":"Śukla Daśamī","elongation_degrees":110.1433,"elapsed_within_tithi_degrees":2.1433},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2,"moon_longitude":19.0775,"elapsed_within_degrees":5.7442},"yoga":{"number":22,"name":"Sādhya","sum_longitude":288.0117},"karana":{"half_tithi_index":18,"name":"Taitila"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-1.235,"elongation":110.143},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-1.235,"opposition_distance":69.857}},"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":"05:27","sunsetLocal":"19:26","solarNoonLocal":"12:26","dayLengthHours":13.991637940660635,"dayLengthDisplay":"13 Hours 59 Mins 30 Secs","nightLengthDisplay":"10 Hours 00 Mins 30 Secs","moonriseLocal":"14:25","moonsetLocal":"01:06","rahuKala":{"name":"Rāhu Kāla","start":"12:26","end":"14:11","startHours":12.437515025696296,"endHours":14.186469768278876,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"07:11","end":"08:56","startHours":7.190650797948557,"endHours":8.939605540531137,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:41","end":"12:26","startHours":10.688560283113716,"endHours":12.437515025696296,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:42","end":"09:10","startHours":8.706411574853458,"endHours":9.172799506208815,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:01","end":"06:24","startHours":6.024680969560171,"endHours":6.397791314644454,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:58","end":"12:54","startHours":11.97112709434094,"endHours":12.903902957051649,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:35","end":"04:31","startHours":3.57614432994456,"endHours":4.508920192655269,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:17","end":"05:27","startHours":4.275726226977591,"endHours":5.441696055365978,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:46","end":"15:42","startHours":14.769454682473068,"endHours":15.702230545183777,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:14","end":"19:38","startHours":19.233333996026612,"endHours":19.63333399602661,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:26","end":"20:01","startHours":19.43333399602661,"endHours":20.016318910220804,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:11","end":"20:56","startHours":19.18333399602661,"endHours":20.93333399602661,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:58","end":"00:54","startHours":23.97112709434094,"endHours":24.903902957051645,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"05:27","end":"07:11","startHours":5.441696055365978,"endHours":7.190650797948557,"quality":"auspicious"},{"name":"Amṛta","start":"07:11","end":"08:56","startHours":7.190650797948557,"endHours":8.939605540531137,"quality":"auspicious"},{"name":"Kāla","start":"08:56","end":"10:41","startHours":8.939605540531137,"endHours":10.688560283113716,"quality":"inauspicious"},{"name":"Śubha","start":"10:41","end":"12:26","startHours":10.688560283113716,"endHours":12.437515025696296,"quality":"auspicious"},{"name":"Roga","start":"12:26","end":"14:11","startHours":12.437515025696296,"endHours":14.186469768278876,"quality":"inauspicious"},{"name":"Udveg","start":"14:11","end":"15:56","startHours":14.186469768278876,"endHours":15.935424510861452,"quality":"inauspicious"},{"name":"Chala","start":"15:56","end":"17:41","startHours":15.935424510861452,"endHours":17.684379253444032,"quality":"neutral"},{"name":"Labha","start":"17:41","end":"19:26","startHours":17.684379253444032,"endHours":19.43333399602661,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"19:26","end":"20:41","startHours":19.43333399602661,"endHours":20.684379253444032,"quality":"inauspicious"},{"name":"Chala","start":"20:41","end":"21:56","startHours":20.684379253444032,"endHours":21.935424510861452,"quality":"neutral"},{"name":"Labha","start":"21:56","end":"23:11","startHours":21.935424510861452,"endHours":23.186469768278872,"quality":"auspicious"},{"name":"Amṛta","start":"23:11","end":"00:26","startHours":23.186469768278872,"endHours":24.437515025696293,"quality":"auspicious"},{"name":"Kāla","start":"00:26","end":"01:41","startHours":24.437515025696293,"endHours":25.688560283113716,"quality":"inauspicious"},{"name":"Śubha","start":"01:41","end":"02:56","startHours":25.688560283113716,"endHours":26.939605540531137,"quality":"auspicious"},{"name":"Roga","start":"02:56","end":"04:11","startHours":26.939605540531137,"endHours":28.190650797948557,"quality":"inauspicious"},{"name":"Udveg","start":"04:11","end":"05:27","startHours":28.190650797948557,"endHours":29.441696055365977,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:27","end":"06:27","startHours":5.441696055365978,"endHours":6.441696055365978,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"06:27","end":"07:27","startHours":6.441696055365978,"endHours":7.441696055365978,"planetary_lord":"Venus"},{"name":"Hora 3","start":"07:27","end":"08:27","startHours":7.441696055365978,"endHours":8.441696055365977,"planetary_lord":"Sun"},{"name":"Hora 4","start":"08:27","end":"09:27","startHours":8.441696055365977,"endHours":9.441696055365977,"planetary_lord":"Mars"},{"name":"Hora 5","start":"09:27","end":"10:27","startHours":9.441696055365977,"endHours":10.441696055365977,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"10:27","end":"11:27","startHours":10.441696055365977,"endHours":11.441696055365977,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"11:27","end":"12:27","startHours":11.441696055365977,"endHours":12.441696055365977,"planetary_lord":"Moon"},{"name":"Hora 8","start":"12:27","end":"13:27","startHours":12.441696055365977,"endHours":13.441696055365977,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"13:27","end":"14:27","startHours":13.441696055365977,"endHours":14.441696055365977,"planetary_lord":"Venus"},{"name":"Hora 10","start":"14:27","end":"15:27","startHours":14.441696055365977,"endHours":15.441696055365977,"planetary_lord":"Sun"},{"name":"Hora 11","start":"15:27","end":"16:27","startHours":15.441696055365977,"endHours":16.441696055365977,"planetary_lord":"Mars"},{"name":"Hora 12","start":"16:27","end":"17:27","startHours":16.441696055365977,"endHours":17.441696055365977,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"17:27","end":"18:27","startHours":17.441696055365977,"endHours":18.441696055365977,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"18:27","end":"19:27","startHours":18.441696055365977,"endHours":19.441696055365977,"planetary_lord":"Moon"},{"name":"Hora 15","start":"19:27","end":"20:27","startHours":19.441696055365977,"endHours":20.441696055365977,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"20:27","end":"21:27","startHours":20.441696055365977,"endHours":21.441696055365977,"planetary_lord":"Venus"},{"name":"Hora 17","start":"21:27","end":"22:27","startHours":21.441696055365977,"endHours":22.441696055365977,"planetary_lord":"Sun"},{"name":"Hora 18","start":"22:27","end":"23:27","startHours":22.441696055365977,"endHours":23.441696055365977,"planetary_lord":"Mars"},{"name":"Hora 19","start":"23:27","end":"00:27","startHours":23.441696055365977,"endHours":24.441696055365977,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"00:27","end":"01:27","startHours":24.441696055365977,"endHours":25.441696055365977,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"01:27","end":"02:27","startHours":25.441696055365977,"endHours":26.441696055365977,"planetary_lord":"Moon"},{"name":"Hora 22","start":"02:27","end":"03:27","startHours":26.441696055365977,"endHours":27.441696055365977,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"03:27","end":"04:27","startHours":27.441696055365977,"endHours":28.441696055365977,"planetary_lord":"Venus"},{"name":"Hora 24","start":"04:27","end":"05:27","startHours":28.441696055365977,"endHours":29.441696055365977,"planetary_lord":"Sun"}],"taraBala":{"favorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Uttara Phalgunī","Hasta","Citrā","Svātī","Viśākhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","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":"North (Uttara)","chandraVasa":"East","rahuVasa":"South-West","anandadiYoga":{"name":"Padma","quality":"Auspicious"},"tropicalRitu":"Hemanta (Pre-winter) (tropical)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-21.0003865181725,"eotMinutes":-9.692901541777706,"ayanamsa":26.2423}},"calendars":{"vikram_samvat":2228,"vikram_samvatsara":"Tāraṇa","saka_samvat":2093,"saka_samvatsara":"Prajāpati","bengali_samvat":1578,"malayalam_era":1347,"nanakshahi_year":702,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Pauṣa","lunar_month_amanta":"Pauṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Śukla Daśamī · Vikram 2228 Tāraṇa · Śaka 2093 Prajāpati"},"festivals":[{"id":"lohri","name":"Lohri","name_sanskrit":"लोहड़ी","tradition":"Regional","significance":"Punjab harvest festival; eve of Makara Saṅkrānti.","vrata":false,"detection":{"sun_rashi_eve_of_ingress":"Makara"},"precedence":4}],"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 January 16, 2171 CE · Perth, Australia · Vidhyamitra","description":"January 16, 2171 CE for Perth, Australia: Śukla Daśamī, sūryodaya 05:27, sūryāsta 19:26.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2171-01-16","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2171-01-16","sa":"https://sa.vidhyamitra.com/city/perth/2171-01-16","hi":"https://hi.vidhyamitra.com/city/perth/2171-01-16","x-default":"https://vidhyamitra.com/city/perth/2171-01-16"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T22:33:11.691Z","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":"2026-06-01T22:33:11.691Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T22:33:11.691Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}