{"id":"vidhyamitra:city-day:perth:2172-12-28:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2172-12-28","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2172-12-28","date_display":"December 28, 2172 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":2172,"month":12,"day":28,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2514728.770833,"kali_year":5274,"ahargana":1926263.2708,"sun":{"sidereal_longitude":249.9002,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":45.4352,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":155.535,"elapsed_within_tithi_degrees":11.535},"nakshatra":{"number":4,"name":"Rohiṇī","pada":2,"moon_longitude":45.4352,"elapsed_within_degrees":5.4352},"yoga":{"number":23,"name":"Śubha","sum_longitude":295.3355},"karana":{"half_tithi_index":25,"name":"Taitila"},"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":2172,"month":12,"day":28,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2514728.770833,"ahargana":1926263.2708,"kali_year":5274,"ayanamsa_lahiri":26.2695,"grahas":{"sun":{"sidereal_longitude":250.59822600000007,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":4},"retrograde":false},"moon":{"sidereal_longitude":46.48452600000002,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":2},"retrograde":false,"latitude":3.3496},"mars":{"sidereal_longitude":291.88822600000003,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":260.812326,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":219.259726,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":238.240226,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":327.2419259999999,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":357.3021,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":177.3021,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"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":2172,"month":12,"day":28,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2514728.770833,"kali_year":5274,"ahargana":1926263.2708,"sun":{"sidereal_longitude":249.9002,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":45.4352,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":155.535,"elapsed_within_tithi_degrees":11.535},"nakshatra":{"number":4,"name":"Rohiṇī","pada":2,"moon_longitude":45.4352,"elapsed_within_degrees":5.4352},"yoga":{"number":23,"name":"Śubha","sum_longitude":295.3355},"karana":{"half_tithi_index":25,"name":"Taitila"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.35,"elongation":155.535},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.35,"opposition_distance":24.465}},"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":"05:12","sunsetLocal":"19:25","solarNoonLocal":"12:18","dayLengthHours":14.22145453149642,"dayLengthDisplay":"14 Hours 13 Mins 17 Secs","nightLengthDisplay":"9 Hours 46 Mins 43 Secs","moonriseLocal":"17:38","moonsetLocal":"03:46","rahuKala":{"name":"Rāhu Kāla","start":"06:58","end":"08:45","startHours":6.974372958426965,"endHours":8.752054774864018,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:32","end":"12:18","startHours":10.52973659130107,"endHours":12.307418407738123,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:05","end":"15:52","startHours":14.085100224175175,"endHours":15.862782040612228,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:31","end":"08:59","startHours":8.51503053267241,"endHours":8.989079017055625,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:47","end":"06:10","startHours":5.7892517474689305,"endHours":6.1684905349755015,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:50","end":"12:47","startHours":11.833369923354908,"endHours":12.781466892121337,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:18","end":"04:15","startHours":3.3004972044570566,"endHours":4.248594173223484,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:01","end":"05:12","startHours":4.011569931031877,"endHours":5.196691141989913,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:41","end":"15:38","startHours":14.677660829654194,"endHours":15.625757798420622,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:13","end":"19:37","startHours":19.218145673486333,"endHours":19.61814567348633,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:25","end":"20:01","startHours":19.418145673486332,"endHours":20.01070627896535,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:10","end":"20:55","startHours":19.168145673486332,"endHours":20.918145673486332,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:50","end":"00:47","startHours":23.83336992335491,"endHours":24.781466892121337,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"05:12","end":"06:58","startHours":5.196691141989913,"endHours":6.974372958426965,"quality":"auspicious"},{"name":"Kāla","start":"06:58","end":"08:45","startHours":6.974372958426965,"endHours":8.752054774864018,"quality":"inauspicious"},{"name":"Śubha","start":"08:45","end":"10:32","startHours":8.752054774864018,"endHours":10.52973659130107,"quality":"auspicious"},{"name":"Roga","start":"10:32","end":"12:18","startHours":10.52973659130107,"endHours":12.307418407738123,"quality":"inauspicious"},{"name":"Udveg","start":"12:18","end":"14:05","startHours":12.307418407738123,"endHours":14.085100224175175,"quality":"inauspicious"},{"name":"Chala","start":"14:05","end":"15:52","startHours":14.085100224175175,"endHours":15.862782040612228,"quality":"neutral"},{"name":"Labha","start":"15:52","end":"17:38","startHours":15.862782040612228,"endHours":17.64046385704928,"quality":"auspicious"},{"name":"Amṛta","start":"17:38","end":"19:25","startHours":17.64046385704928,"endHours":19.418145673486332,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"19:25","end":"20:38","startHours":19.418145673486332,"endHours":20.64046385704928,"quality":"neutral"},{"name":"Labha","start":"20:38","end":"21:52","startHours":20.64046385704928,"endHours":21.862782040612228,"quality":"auspicious"},{"name":"Amṛta","start":"21:52","end":"23:05","startHours":21.862782040612228,"endHours":23.085100224175175,"quality":"auspicious"},{"name":"Kāla","start":"23:05","end":"00:18","startHours":23.085100224175175,"endHours":24.307418407738123,"quality":"inauspicious"},{"name":"Śubha","start":"00:18","end":"01:32","startHours":24.307418407738123,"endHours":25.52973659130107,"quality":"auspicious"},{"name":"Roga","start":"01:32","end":"02:45","startHours":25.52973659130107,"endHours":26.752054774864018,"quality":"inauspicious"},{"name":"Udveg","start":"02:45","end":"03:58","startHours":26.752054774864018,"endHours":27.974372958426965,"quality":"inauspicious"},{"name":"Chala","start":"03:58","end":"05:12","startHours":27.974372958426965,"endHours":29.196691141989913,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"05:12","end":"06:12","startHours":5.196691141989913,"endHours":6.196691141989913,"planetary_lord":"Moon"},{"name":"Hora 2","start":"06:12","end":"07:12","startHours":6.196691141989913,"endHours":7.196691141989913,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"07:12","end":"08:12","startHours":7.196691141989913,"endHours":8.196691141989913,"planetary_lord":"Venus"},{"name":"Hora 4","start":"08:12","end":"09:12","startHours":8.196691141989913,"endHours":9.196691141989913,"planetary_lord":"Sun"},{"name":"Hora 5","start":"09:12","end":"10:12","startHours":9.196691141989913,"endHours":10.196691141989913,"planetary_lord":"Mars"},{"name":"Hora 6","start":"10:12","end":"11:12","startHours":10.196691141989913,"endHours":11.196691141989913,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"11:12","end":"12:12","startHours":11.196691141989913,"endHours":12.196691141989913,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"12:12","end":"13:12","startHours":12.196691141989913,"endHours":13.196691141989913,"planetary_lord":"Moon"},{"name":"Hora 9","start":"13:12","end":"14:12","startHours":13.196691141989913,"endHours":14.196691141989913,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"14:12","end":"15:12","startHours":14.196691141989913,"endHours":15.196691141989913,"planetary_lord":"Venus"},{"name":"Hora 11","start":"15:12","end":"16:12","startHours":15.196691141989913,"endHours":16.196691141989913,"planetary_lord":"Sun"},{"name":"Hora 12","start":"16:12","end":"17:12","startHours":16.196691141989913,"endHours":17.196691141989913,"planetary_lord":"Mars"},{"name":"Hora 13","start":"17:12","end":"18:12","startHours":17.196691141989913,"endHours":18.196691141989913,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"18:12","end":"19:12","startHours":18.196691141989913,"endHours":19.196691141989913,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"19:12","end":"20:12","startHours":19.196691141989913,"endHours":20.196691141989913,"planetary_lord":"Moon"},{"name":"Hora 16","start":"20:12","end":"21:12","startHours":20.196691141989913,"endHours":21.196691141989913,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"21:12","end":"22:12","startHours":21.196691141989913,"endHours":22.196691141989913,"planetary_lord":"Venus"},{"name":"Hora 18","start":"22:12","end":"23:12","startHours":22.196691141989913,"endHours":23.196691141989913,"planetary_lord":"Sun"},{"name":"Hora 19","start":"23:12","end":"00:12","startHours":23.196691141989913,"endHours":24.196691141989913,"planetary_lord":"Mars"},{"name":"Hora 20","start":"00:12","end":"01:12","startHours":24.196691141989913,"endHours":25.196691141989913,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"01:12","end":"02:12","startHours":25.196691141989913,"endHours":26.196691141989913,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"02:12","end":"03:12","startHours":26.196691141989913,"endHours":27.196691141989913,"planetary_lord":"Moon"},{"name":"Hora 23","start":"03:12","end":"04:12","startHours":27.196691141989913,"endHours":28.196691141989913,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"04:12","end":"05:12","startHours":28.196691141989913,"endHours":29.196691141989913,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Citrā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Karka","Tulā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Siṃha","Kanyā","Dhanu","Makara"]},"dishaShool":"East (Pūrva)","chandraVasa":"South-East","rahuVasa":"North-East","anandadiYoga":{"name":"Śrīvatsa","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":-23.25840745386912,"eotMinutes":-1.8871044642874448,"ayanamsa":26.2695}},"calendars":{"vikram_samvat":2229,"vikram_samvatsara":"Pārthiva","saka_samvat":2094,"saka_samvatsara":"Aṅgirasa","bengali_samvat":1579,"malayalam_era":1348,"nanakshahi_year":703,"lunar_month":"Mārgaśīrṣa","lunar_month_paksha_full":"Mārgaśīrṣa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Mārgaśīrṣa","lunar_month_amanta":"Mārgaśīrṣa","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":"Mārgaśīrṣa Śukla Trayodaśī · Vikram 2229 Pārthiva · Śaka 2094 Aṅgirasa"},"festivals":[{"id":"pradosha-vrata","name":"Pradoṣa Vrata","name_sanskrit":"प्रदोष व्रत","tradition":"Shaiva","associated_deity":"Śiva","significance":"Twilight worship of Śiva on Trayodaśī.","vrata":true,"detection":{"any_of":[{"tithi_number":13},{"tithi_number":28}]},"precedence":7}],"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":"-3226-07-09","event":"Bhagavān Krishna's birth at Mathurā","chart_id":"krishna","shared_marker":"same Rohiṇī","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 December 28, 2172 CE · Perth, Australia · Vidhyamitra","description":"December 28, 2172 CE for Perth, Australia: Śukla Trayodaśī, sūryodaya 05:12, sūryāsta 19:25.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2172-12-28","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2172-12-28","sa":"https://sa.vidhyamitra.com/city/perth/2172-12-28","hi":"https://hi.vidhyamitra.com/city/perth/2172-12-28","x-default":"https://vidhyamitra.com/city/perth/2172-12-28"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T12:01:17.332Z","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":"2026-05-31T12:01:17.332Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T12:01:17.332Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}