{"id":"vidhyamitra:city-day:perth:1901-01-20:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1901-01-20","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1901-01-20","date_display":"January 20, 1901 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":1901,"month":1,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2415404.770833,"kali_year":5002,"ahargana":1826939.2708,"sun":{"sidereal_longitude":277.0059,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":268.7073,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":30,"name":"Amāvasyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Amāvasyā","elongation_degrees":351.7014,"elapsed_within_tithi_degrees":3.7014},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1,"moon_longitude":268.7073,"elapsed_within_degrees":2.0407},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":185.7132},"karana":{"half_tithi_index":58,"name":"Catuṣpāda"},"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":1901,"month":1,"day":20,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2415404.770833,"ahargana":1826939.2708,"kali_year":5002,"ayanamsa_lahiri":22.4708,"grahas":{"sun":{"sidereal_longitude":276.83873300000005,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":269.70143299999995,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"retrograde":false,"latitude":3.3813},"mars":{"sidereal_longitude":141.09783300000004,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":276.90793299999996,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":249.15523299999995,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false},"venus":{"sidereal_longitude":253.36453300000005,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":258.63853300000005,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":219.9656,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":39.9656,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","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":1901,"month":1,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2415404.770833,"kali_year":5002,"ahargana":1826939.2708,"sun":{"sidereal_longitude":277.0059,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":268.7073,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":30,"name":"Amāvasyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Amāvasyā","elongation_degrees":351.7014,"elapsed_within_tithi_degrees":3.7014},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1,"moon_longitude":268.7073,"elapsed_within_degrees":2.0407},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":185.7132},"karana":{"half_tithi_index":58,"name":"Catuṣpāda"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.381,"elongation":8.299},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.381,"opposition_distance":171.701}},"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":"05:30","sunsetLocal":"19:25","solarNoonLocal":"12:28","dayLengthHours":13.921504261959484,"dayLengthDisplay":"13 Hours 55 Mins 17 Secs","nightLengthDisplay":"10 Hours 04 Mins 43 Secs","moonriseLocal":"04:59","moonsetLocal":"18:59","rahuKala":{"name":"Rāhu Kāla","start":"17:41","end":"19:25","startHours":17.679269153855294,"endHours":19.41945718660023,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:28","end":"14:12","startHours":12.458705055620488,"endHours":14.198893088365423,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:56","end":"17:41","startHours":15.939081121110359,"endHours":17.679269153855294,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:45","end":"09:13","startHours":8.74630391909796,"endHours":9.210354061163276,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:05","end":"06:27","startHours":6.078015602222392,"endHours":6.449255715874645,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:00","end":"12:55","startHours":11.994654913555172,"endHours":12.922755197685804,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:39","end":"04:34","startHours":3.6417523563794822,"endHours":4.569852640510114,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:20","end":"05:30","startHours":4.337827569477456,"endHours":5.497952924640747,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:47","end":"15:42","startHours":14.778955765947071,"endHours":15.707056050077703,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:13","end":"19:37","startHours":19.21945718660023,"endHours":19.61945718660023,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:25","end":"20:00","startHours":19.41945718660023,"endHours":19.999519864181874,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:10","end":"20:55","startHours":19.16945718660023,"endHours":20.91945718660023,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:00","end":"00:55","startHours":23.994654913555173,"endHours":24.922755197685802,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:30","end":"07:14","startHours":5.497952924640747,"endHours":7.238140957385682,"quality":"inauspicious"},{"name":"Chala","start":"07:14","end":"08:59","startHours":7.238140957385682,"endHours":8.978328990130617,"quality":"neutral"},{"name":"Labha","start":"08:59","end":"10:43","startHours":8.978328990130617,"endHours":10.718517022875552,"quality":"auspicious"},{"name":"Amṛta","start":"10:43","end":"12:28","startHours":10.718517022875552,"endHours":12.458705055620488,"quality":"auspicious"},{"name":"Kāla","start":"12:28","end":"14:12","startHours":12.458705055620488,"endHours":14.198893088365423,"quality":"inauspicious"},{"name":"Śubha","start":"14:12","end":"15:56","startHours":14.198893088365423,"endHours":15.939081121110359,"quality":"auspicious"},{"name":"Roga","start":"15:56","end":"17:41","startHours":15.939081121110359,"endHours":17.679269153855294,"quality":"inauspicious"},{"name":"Udveg","start":"17:41","end":"19:25","startHours":17.679269153855294,"endHours":19.41945718660023,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"19:25","end":"20:41","startHours":19.41945718660023,"endHours":20.679269153855294,"quality":"auspicious"},{"name":"Roga","start":"20:41","end":"21:56","startHours":20.679269153855294,"endHours":21.93908112111036,"quality":"inauspicious"},{"name":"Udveg","start":"21:56","end":"23:12","startHours":21.93908112111036,"endHours":23.198893088365423,"quality":"inauspicious"},{"name":"Chala","start":"23:12","end":"00:28","startHours":23.198893088365423,"endHours":24.458705055620488,"quality":"neutral"},{"name":"Labha","start":"00:28","end":"01:43","startHours":24.458705055620488,"endHours":25.718517022875552,"quality":"auspicious"},{"name":"Amṛta","start":"01:43","end":"02:59","startHours":25.718517022875552,"endHours":26.978328990130617,"quality":"auspicious"},{"name":"Kāla","start":"02:59","end":"04:14","startHours":26.978328990130617,"endHours":28.23814095738568,"quality":"inauspicious"},{"name":"Śubha","start":"04:14","end":"05:30","startHours":28.23814095738568,"endHours":29.497952924640746,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:30","end":"06:30","startHours":5.497952924640747,"endHours":6.497952924640747,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:30","end":"07:30","startHours":6.497952924640747,"endHours":7.497952924640747,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:30","end":"08:30","startHours":7.497952924640747,"endHours":8.497952924640746,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:30","end":"09:30","startHours":8.497952924640746,"endHours":9.497952924640746,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:30","end":"10:30","startHours":9.497952924640746,"endHours":10.497952924640746,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:30","end":"11:30","startHours":10.497952924640746,"endHours":11.497952924640746,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:30","end":"12:30","startHours":11.497952924640746,"endHours":12.497952924640746,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:30","end":"13:30","startHours":12.497952924640746,"endHours":13.497952924640746,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:30","end":"14:30","startHours":13.497952924640746,"endHours":14.497952924640746,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:30","end":"15:30","startHours":14.497952924640746,"endHours":15.497952924640746,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:30","end":"16:30","startHours":15.497952924640746,"endHours":16.497952924640746,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:30","end":"17:30","startHours":16.497952924640746,"endHours":17.497952924640746,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:30","end":"18:30","startHours":17.497952924640746,"endHours":18.497952924640746,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:30","end":"19:30","startHours":18.497952924640746,"endHours":19.497952924640746,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:30","end":"20:30","startHours":19.497952924640746,"endHours":20.497952924640746,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:30","end":"21:30","startHours":20.497952924640746,"endHours":21.497952924640746,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:30","end":"22:30","startHours":21.497952924640746,"endHours":22.497952924640746,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:30","end":"23:30","startHours":22.497952924640746,"endHours":23.497952924640746,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:30","end":"00:30","startHours":23.497952924640746,"endHours":24.497952924640746,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:30","end":"01:30","startHours":24.497952924640746,"endHours":25.497952924640746,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:30","end":"02:30","startHours":25.497952924640746,"endHours":26.497952924640746,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:30","end":"03:30","startHours":26.497952924640746,"endHours":27.497952924640746,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:30","end":"04:30","startHours":27.497952924640746,"endHours":28.497952924640746,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:30","end":"05:30","startHours":28.497952924640746,"endHours":29.497952924640746,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Hasta","Citrā","Svātī","Viśākhā","Anurādhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Tulā","Dhanu","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Makara","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"East","rahuVasa":"North-East","anandadiYoga":{"name":"Amṛta","quality":"Auspicious"},"tropicalRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-20.292804753264353,"eotMinutes":-10.9643033372293,"ayanamsa":22.4708}},"calendars":{"vikram_samvat":1958,"vikram_samvatsara":"Ānanda","saka_samvat":1823,"saka_samvatsara":"Plava","bengali_samvat":1308,"malayalam_era":1077,"nanakshahi_year":432,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Māgha","lunar_month_amanta":"Pauṣa","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 Kṛṣṇa Amāvasyā · Vikram 1958 Ānanda · Śaka 1823 Plava"},"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":[{"historical_date":"-3137-10-20","event":"Karṇa-Vadha (Mahābhārata Day 17)","chart_id":"karna","shared_marker":"same Kṛṣṇa Amāvasyā","url":"/day/-3137-10-20","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 January 20, 1901 CE · Perth, Australia · Vidhyamitra","description":"January 20, 1901 CE for Perth, Australia: Kṛṣṇa Amāvasyā, sūryodaya 05:30, sūryāsta 19:25.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1901-01-20","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1901-01-20","sa":"https://sa.vidhyamitra.com/city/perth/1901-01-20","hi":"https://hi.vidhyamitra.com/city/perth/1901-01-20","x-default":"https://vidhyamitra.com/city/perth/1901-01-20"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T22:54:15.972Z","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":"2026-05-31T22:54:15.972Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T22:54:15.972Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}