{"id":"vidhyamitra:city-day:perth:2011-01-21:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2011-01-21","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2011-01-21","date_display":"January 21, 2011 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":2011,"month":1,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2455582.770833,"kali_year":5112,"ahargana":1867117.2708,"sun":{"sidereal_longitude":276.5309,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":110.233,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":17,"name":"Dvitīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvitīyā","elongation_degrees":193.7021,"elapsed_within_tithi_degrees":1.7021},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2,"moon_longitude":110.233,"elapsed_within_degrees":3.5664},"yoga":{"number":3,"name":"Āyuṣmān","sum_longitude":26.7639},"karana":{"half_tithi_index":32,"name":"Taitila"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"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":2011,"month":1,"day":21,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2455582.770833,"ahargana":1867117.2708,"kali_year":5112,"ayanamsa_lahiri":24.0074,"grahas":{"sun":{"sidereal_longitude":276.62303799999995,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":112.37683800000002,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":2},"retrograde":false,"latitude":-2.8357},"mars":{"sidereal_longitude":279.8399380000001,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":255.47183799999993,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":335.736538,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":229.99213799999995,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":172.94643799999994,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":251.1418,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":71.1418,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","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":2011,"month":1,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2455582.770833,"kali_year":5112,"ahargana":1867117.2708,"sun":{"sidereal_longitude":276.5309,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":110.233,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":17,"name":"Dvitīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvitīyā","elongation_degrees":193.7021,"elapsed_within_tithi_degrees":1.7021},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2,"moon_longitude":110.233,"elapsed_within_degrees":3.5664},"yoga":{"number":3,"name":"Āyuṣmān","sum_longitude":26.7639},"karana":{"half_tithi_index":32,"name":"Taitila"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.836,"elongation":166.298},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.836,"opposition_distance":13.702}},"eclipse_window_40days":[{"offset_days":-17,"type":"solar","occurs":true,"moon_latitude":0.37,"elongation":2.307}]},"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":"05:31","sunsetLocal":"19:25","solarNoonLocal":"12:28","dayLengthHours":13.894024432055993,"dayLengthDisplay":"13 Hours 53 Mins 38 Secs","nightLengthDisplay":"10 Hours 06 Mins 22 Secs","moonriseLocal":"20:09","moonsetLocal":"06:53","rahuKala":{"name":"Rāhu Kāla","start":"10:44","end":"12:28","startHours":10.726809133478536,"endHours":12.463562187485536,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"15:56","end":"17:40","startHours":15.937068295499534,"endHours":17.673821349506532,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:15","end":"08:59","startHours":7.253303025464539,"endHours":8.990056079471538,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:46","end":"09:13","startHours":8.758489005603938,"endHours":9.221623153339138,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:06","end":"06:28","startHours":6.095467656126539,"endHours":6.465974974314699,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:00","end":"12:56","startHours":12.000428039750336,"endHours":12.926696335220736,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:40","end":"04:35","startHours":3.6640133805167405,"endHours":4.59028167598714,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:22","end":"05:31","startHours":4.358714602119541,"endHours":5.51654997145754,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:47","end":"15:42","startHours":14.779232926161534,"endHours":15.705501221631932,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:13","end":"19:37","startHours":19.210574403513533,"endHours":19.61057440351353,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:25","end":"19:59","startHours":19.410574403513532,"endHours":19.989492088182534,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:10","end":"20:55","startHours":19.160574403513532,"endHours":20.910574403513532,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:00","end":"00:56","startHours":24.000428039750336,"endHours":24.926696335220736,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"05:31","end":"07:15","startHours":5.51654997145754,"endHours":7.253303025464539,"quality":"neutral"},{"name":"Labha","start":"07:15","end":"08:59","startHours":7.253303025464539,"endHours":8.990056079471538,"quality":"auspicious"},{"name":"Amṛta","start":"08:59","end":"10:44","startHours":8.990056079471538,"endHours":10.726809133478536,"quality":"auspicious"},{"name":"Kāla","start":"10:44","end":"12:28","startHours":10.726809133478536,"endHours":12.463562187485536,"quality":"inauspicious"},{"name":"Śubha","start":"12:28","end":"14:12","startHours":12.463562187485536,"endHours":14.200315241492536,"quality":"auspicious"},{"name":"Roga","start":"14:12","end":"15:56","startHours":14.200315241492536,"endHours":15.937068295499534,"quality":"inauspicious"},{"name":"Udveg","start":"15:56","end":"17:40","startHours":15.937068295499534,"endHours":17.673821349506532,"quality":"inauspicious"},{"name":"Chala","start":"17:40","end":"19:25","startHours":17.673821349506532,"endHours":19.410574403513532,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"19:25","end":"20:40","startHours":19.410574403513532,"endHours":20.673821349506532,"quality":"inauspicious"},{"name":"Udveg","start":"20:40","end":"21:56","startHours":20.673821349506532,"endHours":21.937068295499536,"quality":"inauspicious"},{"name":"Chala","start":"21:56","end":"23:12","startHours":21.937068295499536,"endHours":23.200315241492536,"quality":"neutral"},{"name":"Labha","start":"23:12","end":"00:28","startHours":23.200315241492536,"endHours":24.463562187485536,"quality":"auspicious"},{"name":"Amṛta","start":"00:28","end":"01:44","startHours":24.463562187485536,"endHours":25.726809133478536,"quality":"auspicious"},{"name":"Kāla","start":"01:44","end":"02:59","startHours":25.726809133478536,"endHours":26.990056079471536,"quality":"inauspicious"},{"name":"Śubha","start":"02:59","end":"04:15","startHours":26.990056079471536,"endHours":28.25330302546454,"quality":"auspicious"},{"name":"Roga","start":"04:15","end":"05:31","startHours":28.25330302546454,"endHours":29.51654997145754,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:31","end":"06:31","startHours":5.51654997145754,"endHours":6.51654997145754,"planetary_lord":"Venus"},{"name":"Hora 2","start":"06:31","end":"07:31","startHours":6.51654997145754,"endHours":7.51654997145754,"planetary_lord":"Sun"},{"name":"Hora 3","start":"07:31","end":"08:31","startHours":7.51654997145754,"endHours":8.51654997145754,"planetary_lord":"Mars"},{"name":"Hora 4","start":"08:31","end":"09:31","startHours":8.51654997145754,"endHours":9.51654997145754,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"09:31","end":"10:31","startHours":9.51654997145754,"endHours":10.51654997145754,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"10:31","end":"11:31","startHours":10.51654997145754,"endHours":11.51654997145754,"planetary_lord":"Moon"},{"name":"Hora 7","start":"11:31","end":"12:31","startHours":11.51654997145754,"endHours":12.51654997145754,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"12:31","end":"13:31","startHours":12.51654997145754,"endHours":13.51654997145754,"planetary_lord":"Venus"},{"name":"Hora 9","start":"13:31","end":"14:31","startHours":13.51654997145754,"endHours":14.51654997145754,"planetary_lord":"Sun"},{"name":"Hora 10","start":"14:31","end":"15:31","startHours":14.51654997145754,"endHours":15.51654997145754,"planetary_lord":"Mars"},{"name":"Hora 11","start":"15:31","end":"16:31","startHours":15.51654997145754,"endHours":16.51654997145754,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"16:31","end":"17:31","startHours":16.51654997145754,"endHours":17.51654997145754,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"17:31","end":"18:31","startHours":17.51654997145754,"endHours":18.51654997145754,"planetary_lord":"Moon"},{"name":"Hora 14","start":"18:31","end":"19:31","startHours":18.51654997145754,"endHours":19.51654997145754,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"19:31","end":"20:31","startHours":19.51654997145754,"endHours":20.51654997145754,"planetary_lord":"Venus"},{"name":"Hora 16","start":"20:31","end":"21:31","startHours":20.51654997145754,"endHours":21.51654997145754,"planetary_lord":"Sun"},{"name":"Hora 17","start":"21:31","end":"22:31","startHours":21.51654997145754,"endHours":22.51654997145754,"planetary_lord":"Mars"},{"name":"Hora 18","start":"22:31","end":"23:31","startHours":22.51654997145754,"endHours":23.51654997145754,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"23:31","end":"00:31","startHours":23.51654997145754,"endHours":24.51654997145754,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"00:31","end":"01:31","startHours":24.51654997145754,"endHours":25.51654997145754,"planetary_lord":"Moon"},{"name":"Hora 21","start":"01:31","end":"02:31","startHours":25.51654997145754,"endHours":26.51654997145754,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"02:31","end":"03:31","startHours":26.51654997145754,"endHours":27.51654997145754,"planetary_lord":"Venus"},{"name":"Hora 23","start":"03:31","end":"04:31","startHours":27.51654997145754,"endHours":28.51654997145754,"planetary_lord":"Sun"},{"name":"Hora 24","start":"04:31","end":"05:31","startHours":28.51654997145754,"endHours":29.51654997145754,"planetary_lord":"Mars"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"unfavorable_nakshatras":["Ārdrā","Punarvasu","Puṣya","Aśleṣā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Vṛṣabha","Karka","Kanyā","Dhanu","Makara"],"unfavorable_rashis":["Mithuna","Siṃha","Tulā","Vṛścika","Kumbha","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"South-West","rahuVasa":"South-East","anandadiYoga":{"name":"Ānanda","quality":"Auspicious"},"drikRitu":"Śiśira (Winter) (Drik)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-20.01324975194434,"eotMinutes":-11.255731249132124,"ayanamsa":24.0074}},"calendars":{"vikram_samvat":2068,"vikram_samvatsara":"Krodhi","saka_samvat":1933,"saka_samvatsara":"Khara","bengali_samvat":1418,"malayalam_era":1187,"nanakshahi_year":542,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Kṛṣṇa Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Kṛṣṇa Dvitīyā · Vikram 2068 Krodhi · Śaka 1933 Khara"},"festivals":[{"id":"makara-sankranti","name":"Makara Saṅkrānti (Uttarāyaṇa)","name_sanskrit":"मकर सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Capricorn; Uttarāyaṇa (north-going) begins. Bhīṣma's chosen mahaprasthāna time.","vrata":true,"detection":{"sun_rashi":"Makara"},"precedence":1,"sources":["Mahābhārata Bhīṣma-Stuti","Sūrya-Siddhānta"]},{"id":"pongal","name":"Pongal / Thai Pongal","name_sanskrit":"पोङ्गल","tradition":"Regional","associated_deity":"Sūrya Bhagavān","significance":"Tamil 4-day harvest festival; coincides with Makara Saṅkrānti.","vrata":false,"detection":{"sun_rashi":"Makara"},"precedence":2}],"todays_walk":{"walk":{"id":"shukra-walk","name":"Śukra Walk","name_sanskrit":"शुक्र यात्रा","type":"graha","description":"Beauty + creativity in dharma + BG 10.36.","step_count":5,"url":"/walk/shukra-walk"},"reason":"Śukravāra (Friday) — 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 21, 2011 CE · Perth, Australia · Vidhyamitra","description":"January 21, 2011 CE for Perth, Australia: Kṛṣṇa Dvitīyā, sūryodaya 05:31, sūryāsta 19:25.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2011-01-21","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2011-01-21","sa":"https://sa.vidhyamitra.com/city/perth/2011-01-21","hi":"https://hi.vidhyamitra.com/city/perth/2011-01-21","x-default":"https://vidhyamitra.com/city/perth/2011-01-21"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-17T01:00:10.884Z","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":"2026-05-17T01:00:10.884Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-17T01:00:10.884Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}