{"id":"vidhyamitra:city-day:perth:2108-01-31:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2108-01-31","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2108-01-31","date_display":"January 31, 2108 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":2108,"month":1,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2491020.770833,"kali_year":5209,"ahargana":1902555.2708,"sun":{"sidereal_longitude":284.6243,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":137.3107,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":18,"name":"Tṛtīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Tṛtīyā","elongation_degrees":212.6863,"elapsed_within_tithi_degrees":8.6863},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2,"moon_longitude":137.3107,"elapsed_within_degrees":3.9773},"yoga":{"number":5,"name":"Śobhana","sum_longitude":61.935},"karana":{"half_tithi_index":35,"name":"Viṣṭi"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"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":2108,"month":1,"day":31,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2491020.770833,"ahargana":1902555.2708,"kali_year":5209,"ayanamsa_lahiri":25.3628,"grahas":{"sun":{"sidereal_longitude":284.8833460000001,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false},"moon":{"sidereal_longitude":140.657146,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false,"latitude":-2.6531},"mars":{"sidereal_longitude":167.92854599999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":260.496446,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":44.65104600000001,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":2},"retrograde":true},"venus":{"sidereal_longitude":327.83994600000005,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":265.990546,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":173.466,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":353.466,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","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":2108,"month":1,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2491020.770833,"kali_year":5209,"ahargana":1902555.2708,"sun":{"sidereal_longitude":284.6243,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":137.3107,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":18,"name":"Tṛtīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Tṛtīyā","elongation_degrees":212.6863,"elapsed_within_tithi_degrees":8.6863},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2,"moon_longitude":137.3107,"elapsed_within_degrees":3.9773},"yoga":{"number":5,"name":"Śobhana","sum_longitude":61.935},"karana":{"half_tithi_index":35,"name":"Viṣṭi"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.653,"elongation":147.314},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.653,"opposition_distance":32.686}},"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":"05:40","sunsetLocal":"19:20","solarNoonLocal":"12:30","dayLengthHours":13.66865315980694,"dayLengthDisplay":"13 Hours 40 Mins 07 Secs","nightLengthDisplay":"10 Hours 19 Mins 53 Secs","moonriseLocal":"21:04","moonsetLocal":"08:42","rahuKala":{"name":"Rāhu Kāla","start":"15:55","end":"17:38","startHours":15.918623098982437,"endHours":17.627204743958305,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:05","end":"10:48","startHours":9.084296519078967,"endHours":10.792878164054834,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:30","end":"14:13","startHours":12.501459809030703,"endHours":14.210041454006568,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:51","end":"09:19","startHours":8.856485633082183,"endHours":9.31210740507575,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:14","end":"06:36","startHours":6.236660444119187,"endHours":6.601157861714039,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:03","end":"12:57","startHours":12.045838037037136,"endHours":12.957081581024266,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:51","end":"04:45","startHours":3.844646141152973,"endHours":4.755889685140103,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:32","end":"05:40","startHours":4.528078799143319,"endHours":5.667133229127232,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:47","end":"15:41","startHours":14.779568668998525,"endHours":15.690812212985655,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:08","end":"19:32","startHours":19.13578638893417,"endHours":19.53578638893417,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:20","end":"19:54","startHours":19.33578638893417,"endHours":19.90531360392613,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:05","end":"20:50","startHours":19.08578638893417,"endHours":20.83578638893417,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:03","end":"00:57","startHours":24.045838037037136,"endHours":24.957081581024262,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"05:40","end":"07:23","startHours":5.667133229127232,"endHours":7.3757148741031,"quality":"inauspicious"},{"name":"Udveg","start":"07:23","end":"09:05","startHours":7.3757148741031,"endHours":9.084296519078967,"quality":"inauspicious"},{"name":"Chala","start":"09:05","end":"10:48","startHours":9.084296519078967,"endHours":10.792878164054834,"quality":"neutral"},{"name":"Labha","start":"10:48","end":"12:30","startHours":10.792878164054834,"endHours":12.501459809030703,"quality":"auspicious"},{"name":"Amṛta","start":"12:30","end":"14:13","startHours":12.501459809030703,"endHours":14.210041454006568,"quality":"auspicious"},{"name":"Kāla","start":"14:13","end":"15:55","startHours":14.210041454006568,"endHours":15.918623098982437,"quality":"inauspicious"},{"name":"Śubha","start":"15:55","end":"17:38","startHours":15.918623098982437,"endHours":17.627204743958305,"quality":"auspicious"},{"name":"Roga","start":"17:38","end":"19:20","startHours":17.627204743958305,"endHours":19.33578638893417,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"19:20","end":"20:38","startHours":19.33578638893417,"endHours":20.627204743958302,"quality":"inauspicious"},{"name":"Śubha","start":"20:38","end":"21:55","startHours":20.627204743958302,"endHours":21.918623098982437,"quality":"auspicious"},{"name":"Roga","start":"21:55","end":"23:13","startHours":21.918623098982437,"endHours":23.210041454006568,"quality":"inauspicious"},{"name":"Udveg","start":"23:13","end":"00:30","startHours":23.210041454006568,"endHours":24.5014598090307,"quality":"inauspicious"},{"name":"Chala","start":"00:30","end":"01:48","startHours":24.5014598090307,"endHours":25.792878164054834,"quality":"neutral"},{"name":"Labha","start":"01:48","end":"03:05","startHours":25.792878164054834,"endHours":27.084296519078965,"quality":"auspicious"},{"name":"Amṛta","start":"03:05","end":"04:23","startHours":27.084296519078965,"endHours":28.375714874103096,"quality":"auspicious"},{"name":"Kāla","start":"04:23","end":"05:40","startHours":28.375714874103096,"endHours":29.66713322912723,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:40","end":"06:40","startHours":5.667133229127232,"endHours":6.667133229127232,"planetary_lord":"Mars"},{"name":"Hora 2","start":"06:40","end":"07:40","startHours":6.667133229127232,"endHours":7.667133229127232,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"07:40","end":"08:40","startHours":7.667133229127232,"endHours":8.66713322912723,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"08:40","end":"09:40","startHours":8.66713322912723,"endHours":9.66713322912723,"planetary_lord":"Moon"},{"name":"Hora 5","start":"09:40","end":"10:40","startHours":9.66713322912723,"endHours":10.66713322912723,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"10:40","end":"11:40","startHours":10.66713322912723,"endHours":11.66713322912723,"planetary_lord":"Venus"},{"name":"Hora 7","start":"11:40","end":"12:40","startHours":11.66713322912723,"endHours":12.66713322912723,"planetary_lord":"Sun"},{"name":"Hora 8","start":"12:40","end":"13:40","startHours":12.66713322912723,"endHours":13.66713322912723,"planetary_lord":"Mars"},{"name":"Hora 9","start":"13:40","end":"14:40","startHours":13.66713322912723,"endHours":14.66713322912723,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"14:40","end":"15:40","startHours":14.66713322912723,"endHours":15.66713322912723,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"15:40","end":"16:40","startHours":15.66713322912723,"endHours":16.66713322912723,"planetary_lord":"Moon"},{"name":"Hora 12","start":"16:40","end":"17:40","startHours":16.66713322912723,"endHours":17.66713322912723,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"17:40","end":"18:40","startHours":17.66713322912723,"endHours":18.66713322912723,"planetary_lord":"Venus"},{"name":"Hora 14","start":"18:40","end":"19:40","startHours":18.66713322912723,"endHours":19.66713322912723,"planetary_lord":"Sun"},{"name":"Hora 15","start":"19:40","end":"20:40","startHours":19.66713322912723,"endHours":20.66713322912723,"planetary_lord":"Mars"},{"name":"Hora 16","start":"20:40","end":"21:40","startHours":20.66713322912723,"endHours":21.66713322912723,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"21:40","end":"22:40","startHours":21.66713322912723,"endHours":22.66713322912723,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"22:40","end":"23:40","startHours":22.66713322912723,"endHours":23.66713322912723,"planetary_lord":"Moon"},{"name":"Hora 19","start":"23:40","end":"00:40","startHours":23.66713322912723,"endHours":24.66713322912723,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"00:40","end":"01:40","startHours":24.66713322912723,"endHours":25.66713322912723,"planetary_lord":"Venus"},{"name":"Hora 21","start":"01:40","end":"02:40","startHours":25.66713322912723,"endHours":26.66713322912723,"planetary_lord":"Sun"},{"name":"Hora 22","start":"02:40","end":"03:40","startHours":26.66713322912723,"endHours":27.66713322912723,"planetary_lord":"Mars"},{"name":"Hora 23","start":"03:40","end":"04:40","startHours":27.66713322912723,"endHours":28.66713322912723,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"04:40","end":"05:40","startHours":28.66713322912723,"endHours":29.66713322912723,"planetary_lord":"Saturn"}],"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":["Vṛṣabha","Mithuna","Siṃha","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Kanyā","Vṛścika","Dhanu","Mīna"]},"dishaShool":"North (Uttara)","chandraVasa":"West","rahuVasa":"North","anandadiYoga":{"name":"Siddhi","quality":"Auspicious"},"tropicalRitu":"Śiśira (Winter) (tropical)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-17.672730479398183,"eotMinutes":-13.52958854184206,"ayanamsa":25.3628}},"calendars":{"vikram_samvat":2165,"vikram_samvatsara":"Vṛṣa","saka_samvat":2030,"saka_samvatsara":"Vibhava","bengali_samvat":1515,"malayalam_era":1284,"nanakshahi_year":639,"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 Tṛtīyā · Vikram 2165 Vṛṣa · Śaka 2030 Vibhava"},"festivals":[],"todays_walk":{"walk":{"id":"mangala-walk","name":"Maṅgala Walk","name_sanskrit":"मङ्गल यात्रा","type":"graha","description":"Right action + BG 2.31-38 (kṣatriya-dharma).","step_count":7,"url":"/walk/mangala-walk"},"reason":"Maṅgalavāra (Tuesday) — 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 31, 2108 CE · Perth, Australia · Vidhyamitra","description":"January 31, 2108 CE for Perth, Australia: Kṛṣṇa Tṛtīyā, sūryodaya 05:40, sūryāsta 19:20.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2108-01-31","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2108-01-31","sa":"https://sa.vidhyamitra.com/city/perth/2108-01-31","hi":"https://hi.vidhyamitra.com/city/perth/2108-01-31","x-default":"https://vidhyamitra.com/city/perth/2108-01-31"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T07:01:48.365Z","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":"2026-05-31T07:01:48.365Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T07:01:48.365Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}