{"id":"vidhyamitra:city-day:perth:2131-09-29:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2131-09-29","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2131-09-29","date_display":"September 29, 2131 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":2131,"month":9,"day":29,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2499662.770833,"kali_year":5233,"ahargana":1911197.2708,"sun":{"sidereal_longitude":158.7581,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":245.721,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":86.9629,"elapsed_within_tithi_degrees":2.9629},"nakshatra":{"number":19,"name":"Mūla","pada":2,"moon_longitude":245.721,"elapsed_within_degrees":5.721},"yoga":{"number":4,"name":"Saubhāgya","sum_longitude":44.4791},"karana":{"half_tithi_index":14,"name":"Viṣṭi"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"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":2131,"month":9,"day":29,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2499662.770833,"ahargana":1911197.2708,"kali_year":5233,"ayanamsa_lahiri":25.6933,"grahas":{"sun":{"sidereal_longitude":159.82175800000005,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"moon":{"sidereal_longitude":243.01475800000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false,"latitude":0.7691},"mars":{"sidereal_longitude":19.857158000000027,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2},"retrograde":true},"mercury":{"sidereal_longitude":177.43085799999994,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":62.84745800000002,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":3},"retrograde":false},"venus":{"sidereal_longitude":178.56405799999993,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":196.590058,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":75.5713,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":255.5713,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","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":2131,"month":9,"day":29,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2499662.770833,"kali_year":5233,"ahargana":1911197.2708,"sun":{"sidereal_longitude":158.7581,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":245.721,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":86.9629,"elapsed_within_tithi_degrees":2.9629},"nakshatra":{"number":19,"name":"Mūla","pada":2,"moon_longitude":245.721,"elapsed_within_degrees":5.721},"yoga":{"number":4,"name":"Saubhāgya","sum_longitude":44.4791},"karana":{"half_tithi_index":14,"name":"Viṣṭi"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":0.769,"elongation":86.963},"lunar":{"type":"lunar","occurs":false,"moon_latitude":0.769,"opposition_distance":93.037}},"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":"05:57","sunsetLocal":"18:15","solarNoonLocal":"12:06","dayLengthHours":12.313331200229293,"dayLengthDisplay":"12 Hours 18 Mins 48 Secs","nightLengthDisplay":"11 Hours 41 Mins 12 Secs","moonriseLocal":"10:33","moonsetLocal":"00:45","rahuKala":{"name":"Rāhu Kāla","start":"09:01","end":"10:34","startHours":9.022374593879203,"endHours":10.561540993907865,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:38","end":"15:11","startHours":13.639873793965188,"endHours":15.179040193993849,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"05:57","end":"07:29","startHours":5.944041793821881,"endHours":7.483208193850542,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:49","end":"09:14","startHours":8.817152407208717,"endHours":9.227596780549693,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:27","end":"06:47","startHours":6.457097260498101,"endHours":6.785452759170883,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:41","end":"12:31","startHours":11.690263020595552,"endHours":12.511151767277504,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:18","end":"05:07","startHours":4.302264300457975,"endHours":5.123153047139928,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:55","end":"05:57","startHours":4.91793086046944,"endHours":5.944041793821881,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:09","end":"14:58","startHours":14.152929260641411,"endHours":14.973818007323365,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:03","end":"18:27","startHours":18.057372994051175,"endHours":18.457372994051173,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:15","end":"18:46","startHours":18.257372994051174,"endHours":18.770428460727395,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:00","end":"19:45","startHours":18.007372994051174,"endHours":19.757372994051174,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:41","end":"00:31","startHours":23.690263020595552,"endHours":24.511151767277504,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"05:57","end":"07:29","startHours":5.944041793821881,"endHours":7.483208193850542,"quality":"inauspicious"},{"name":"Śubha","start":"07:29","end":"09:01","startHours":7.483208193850542,"endHours":9.022374593879203,"quality":"auspicious"},{"name":"Roga","start":"09:01","end":"10:34","startHours":9.022374593879203,"endHours":10.561540993907865,"quality":"inauspicious"},{"name":"Udveg","start":"10:34","end":"12:06","startHours":10.561540993907865,"endHours":12.100707393936528,"quality":"inauspicious"},{"name":"Chala","start":"12:06","end":"13:38","startHours":12.100707393936528,"endHours":13.639873793965188,"quality":"neutral"},{"name":"Labha","start":"13:38","end":"15:11","startHours":13.639873793965188,"endHours":15.179040193993849,"quality":"auspicious"},{"name":"Amṛta","start":"15:11","end":"16:43","startHours":15.179040193993849,"endHours":16.71820659402251,"quality":"auspicious"},{"name":"Kāla","start":"16:43","end":"18:15","startHours":16.71820659402251,"endHours":18.257372994051174,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:15","end":"19:43","startHours":18.257372994051174,"endHours":19.71820659402251,"quality":"auspicious"},{"name":"Amṛta","start":"19:43","end":"21:11","startHours":19.71820659402251,"endHours":21.17904019399385,"quality":"auspicious"},{"name":"Kāla","start":"21:11","end":"22:38","startHours":21.17904019399385,"endHours":22.63987379396519,"quality":"inauspicious"},{"name":"Śubha","start":"22:38","end":"00:06","startHours":22.63987379396519,"endHours":24.100707393936528,"quality":"auspicious"},{"name":"Roga","start":"00:06","end":"01:34","startHours":24.100707393936528,"endHours":25.561540993907865,"quality":"inauspicious"},{"name":"Udveg","start":"01:34","end":"03:01","startHours":25.561540993907865,"endHours":27.022374593879206,"quality":"inauspicious"},{"name":"Chala","start":"03:01","end":"04:29","startHours":27.022374593879206,"endHours":28.483208193850544,"quality":"neutral"},{"name":"Labha","start":"04:29","end":"05:57","startHours":28.483208193850544,"endHours":29.94404179382188,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:57","end":"06:57","startHours":5.944041793821881,"endHours":6.944041793821881,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"06:57","end":"07:57","startHours":6.944041793821881,"endHours":7.944041793821881,"planetary_lord":"Moon"},{"name":"Hora 3","start":"07:57","end":"08:57","startHours":7.944041793821881,"endHours":8.944041793821881,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"08:57","end":"09:57","startHours":8.944041793821881,"endHours":9.944041793821881,"planetary_lord":"Venus"},{"name":"Hora 5","start":"09:57","end":"10:57","startHours":9.944041793821881,"endHours":10.944041793821881,"planetary_lord":"Sun"},{"name":"Hora 6","start":"10:57","end":"11:57","startHours":10.944041793821881,"endHours":11.944041793821881,"planetary_lord":"Mars"},{"name":"Hora 7","start":"11:57","end":"12:57","startHours":11.944041793821881,"endHours":12.944041793821881,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"12:57","end":"13:57","startHours":12.944041793821881,"endHours":13.944041793821881,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"13:57","end":"14:57","startHours":13.944041793821881,"endHours":14.944041793821881,"planetary_lord":"Moon"},{"name":"Hora 10","start":"14:57","end":"15:57","startHours":14.944041793821881,"endHours":15.944041793821881,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"15:57","end":"16:57","startHours":15.944041793821881,"endHours":16.94404179382188,"planetary_lord":"Venus"},{"name":"Hora 12","start":"16:57","end":"17:57","startHours":16.94404179382188,"endHours":17.94404179382188,"planetary_lord":"Sun"},{"name":"Hora 13","start":"17:57","end":"18:57","startHours":17.94404179382188,"endHours":18.94404179382188,"planetary_lord":"Mars"},{"name":"Hora 14","start":"18:57","end":"19:57","startHours":18.94404179382188,"endHours":19.94404179382188,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"19:57","end":"20:57","startHours":19.94404179382188,"endHours":20.94404179382188,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"20:57","end":"21:57","startHours":20.94404179382188,"endHours":21.94404179382188,"planetary_lord":"Moon"},{"name":"Hora 17","start":"21:57","end":"22:57","startHours":21.94404179382188,"endHours":22.94404179382188,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"22:57","end":"23:57","startHours":22.94404179382188,"endHours":23.94404179382188,"planetary_lord":"Venus"},{"name":"Hora 19","start":"23:57","end":"00:57","startHours":23.94404179382188,"endHours":24.94404179382188,"planetary_lord":"Sun"},{"name":"Hora 20","start":"00:57","end":"01:57","startHours":24.94404179382188,"endHours":25.94404179382188,"planetary_lord":"Mars"},{"name":"Hora 21","start":"01:57","end":"02:57","startHours":25.94404179382188,"endHours":26.94404179382188,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"02:57","end":"03:57","startHours":26.94404179382188,"endHours":27.94404179382188,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"03:57","end":"04:57","startHours":27.94404179382188,"endHours":28.94404179382188,"planetary_lord":"Moon"},{"name":"Hora 24","start":"04:57","end":"05:57","startHours":28.94404179382188,"endHours":29.94404179382188,"planetary_lord":"Mercury"}],"taraBala":{"favorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Svātī","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"unfavorable_nakshatras":["Aśvinī","Punarvasu","Puṣya","Aśleṣā","Maghā","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Bhādrapadā","Uttara Bhādrapadā","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":"East (Pūrva)","chandraVasa":"East","rahuVasa":"East","anandadiYoga":{"name":"Lumba","quality":"Auspicious"},"tropicalRitu":"Śarad (Autumn) (tropical)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-2.1906656334254713,"eotMinutes":10.515556363808276,"ayanamsa":25.6933}},"calendars":{"vikram_samvat":2188,"vikram_samvatsara":"Krodhi","saka_samvat":2053,"saka_samvatsara":"Khara","bengali_samvat":1538,"malayalam_era":1307,"nanakshahi_year":662,"lunar_month":"Āśvina","lunar_month_paksha_full":"Āśvina Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Āśvina","lunar_month_amanta":"Āśvina","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Kanyā (Puraṭṭāsi)","ritu":"Śarad (Autumn)","display_summary":"Āśvina Śukla Aṣṭamī · Vikram 2188 Krodhi · Śaka 2053 Khara"},"festivals":[{"id":"durga-ashtami","name":"Mahā-Aṣṭamī (Durgā-Aṣṭamī)","name_sanskrit":"महाष्टमी","tradition":"Shakta","associated_deity":"Devī Durgā","significance":"8th day of Śāradīya Navrātri; Mahiṣāsura-mardinī kṣaṇa.","vrata":true,"detection":{"tithi_number":8,"tithi_paksha":"Śukla","lunar_month":"Āśvina"},"precedence":1}],"todays_walk":{"walk":{"id":"shani-walk","name":"Śani Walk","name_sanskrit":"शनि यात्रा","type":"graha","description":"Tapas + endurance + BG 17.14-19.","step_count":7,"url":"/walk/shani-walk"},"reason":"Śanivāra (Saturday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3137-12-25","event":"Bhīṣma's Mahaprasthan","chart_id":"bhishma","shared_marker":"same Śukla Aṣṭamī","url":"/day/-3137-12-25","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 September 29, 2131 CE · Perth, Australia · Vidhyamitra","description":"September 29, 2131 CE for Perth, Australia: Śukla Aṣṭamī, sūryodaya 05:57, sūryāsta 18:15.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2131-09-29","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2131-09-29","sa":"https://sa.vidhyamitra.com/city/perth/2131-09-29","hi":"https://hi.vidhyamitra.com/city/perth/2131-09-29","x-default":"https://vidhyamitra.com/city/perth/2131-09-29"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T22:53:34.332Z","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":"2026-06-01T22:53:34.332Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T22:53:34.332Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}