{"id":"vidhyamitra:city-day:perth:2180-10-31:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2180-10-31","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2180-10-31","date_display":"October 31, 2180 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":2180,"month":10,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2517592.770833,"kali_year":5282,"ahargana":1929127.2708,"sun":{"sidereal_longitude":190.7906,"rashi":7,"rashi_name":"Tulā"},"moon":{"sidereal_longitude":343.815,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":153.0244,"elapsed_within_tithi_degrees":9.0244},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4,"moon_longitude":343.815,"elapsed_within_degrees":10.4817},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":174.6056},"karana":{"half_tithi_index":25,"name":"Taitila"},"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":2180,"month":10,"day":31,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2517592.770833,"ahargana":1929127.2708,"kali_year":5282,"ayanamsa_lahiri":26.3791,"grahas":{"sun":{"sidereal_longitude":191.92380000000003,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":345.457,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4},"retrograde":false,"latitude":2.9941},"mars":{"sidereal_longitude":63.13010000000003,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":3},"retrograde":true},"mercury":{"sidereal_longitude":185.37289999999996,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":111.51819999999998,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":166.0448,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":82.32920000000001,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":205.5536,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":25.5536,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","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":2180,"month":10,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2517592.770833,"kali_year":5282,"ahargana":1929127.2708,"sun":{"sidereal_longitude":190.7906,"rashi":7,"rashi_name":"Tulā"},"moon":{"sidereal_longitude":343.815,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":153.0244,"elapsed_within_tithi_degrees":9.0244},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4,"moon_longitude":343.815,"elapsed_within_degrees":10.4817},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":174.6056},"karana":{"half_tithi_index":25,"name":"Taitila"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.994,"elongation":153.024},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.994,"opposition_distance":26.976}},"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":"05:19","sunsetLocal":"18:41","solarNoonLocal":"12:00","dayLengthHours":13.354092956561058,"dayLengthDisplay":"13 Hours 21 Mins 15 Secs","nightLengthDisplay":"10 Hours 38 Mins 45 Secs","moonriseLocal":"16:23","moonsetLocal":"04:05","rahuKala":{"name":"Rāhu Kāla","start":"15:20","end":"17:01","startHours":15.340276913298126,"endHours":17.00953853286826,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"08:40","end":"10:20","startHours":8.6632304350176,"endHours":10.33249205458773,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:00","end":"13:40","startHours":12.001753674157863,"endHours":13.671015293727995,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:26","end":"08:53","startHours":8.440662219074914,"endHours":8.885798650960282,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:53","end":"06:14","startHours":5.881127735734045,"endHours":6.23723688124234,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:33","end":"12:27","startHours":11.556617242272495,"endHours":12.44689010604323,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:33","end":"04:26","startHours":3.5441614683358598,"endHours":4.434434332106597,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:13","end":"05:19","startHours":4.211866116163913,"endHours":5.324707195877334,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:14","end":"15:07","startHours":14.227435833584707,"endHours":15.117708697355445,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:29","end":"18:53","startHours":18.478800152438392,"endHours":18.87880015243839,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:41","end":"19:14","startHours":18.67880015243839,"endHours":19.2352206922951,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:26","end":"20:11","startHours":18.42880015243839,"endHours":20.17880015243839,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:33","end":"00:27","startHours":23.55661724227249,"endHours":24.44689010604323,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"05:19","end":"07:00","startHours":5.324707195877334,"endHours":6.993968815447467,"quality":"inauspicious"},{"name":"Udveg","start":"07:00","end":"08:40","startHours":6.993968815447467,"endHours":8.6632304350176,"quality":"inauspicious"},{"name":"Chala","start":"08:40","end":"10:20","startHours":8.6632304350176,"endHours":10.33249205458773,"quality":"neutral"},{"name":"Labha","start":"10:20","end":"12:00","startHours":10.33249205458773,"endHours":12.001753674157863,"quality":"auspicious"},{"name":"Amṛta","start":"12:00","end":"13:40","startHours":12.001753674157863,"endHours":13.671015293727995,"quality":"auspicious"},{"name":"Kāla","start":"13:40","end":"15:20","startHours":13.671015293727995,"endHours":15.340276913298126,"quality":"inauspicious"},{"name":"Śubha","start":"15:20","end":"17:01","startHours":15.340276913298126,"endHours":17.00953853286826,"quality":"auspicious"},{"name":"Roga","start":"17:01","end":"18:41","startHours":17.00953853286826,"endHours":18.67880015243839,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"18:41","end":"20:01","startHours":18.67880015243839,"endHours":20.00953853286826,"quality":"inauspicious"},{"name":"Śubha","start":"20:01","end":"21:20","startHours":20.00953853286826,"endHours":21.340276913298126,"quality":"auspicious"},{"name":"Roga","start":"21:20","end":"22:40","startHours":21.340276913298126,"endHours":22.671015293727994,"quality":"inauspicious"},{"name":"Udveg","start":"22:40","end":"00:00","startHours":22.671015293727994,"endHours":24.00175367415786,"quality":"inauspicious"},{"name":"Chala","start":"00:00","end":"01:20","startHours":24.00175367415786,"endHours":25.332492054587732,"quality":"neutral"},{"name":"Labha","start":"01:20","end":"02:40","startHours":25.332492054587732,"endHours":26.6632304350176,"quality":"auspicious"},{"name":"Amṛta","start":"02:40","end":"04:00","startHours":26.6632304350176,"endHours":27.993968815447467,"quality":"auspicious"},{"name":"Kāla","start":"04:00","end":"05:19","startHours":27.993968815447467,"endHours":29.324707195877334,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:19","end":"06:19","startHours":5.324707195877334,"endHours":6.324707195877334,"planetary_lord":"Mars"},{"name":"Hora 2","start":"06:19","end":"07:19","startHours":6.324707195877334,"endHours":7.324707195877334,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"07:19","end":"08:19","startHours":7.324707195877334,"endHours":8.324707195877334,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"08:19","end":"09:19","startHours":8.324707195877334,"endHours":9.324707195877334,"planetary_lord":"Moon"},{"name":"Hora 5","start":"09:19","end":"10:19","startHours":9.324707195877334,"endHours":10.324707195877334,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"10:19","end":"11:19","startHours":10.324707195877334,"endHours":11.324707195877334,"planetary_lord":"Venus"},{"name":"Hora 7","start":"11:19","end":"12:19","startHours":11.324707195877334,"endHours":12.324707195877334,"planetary_lord":"Sun"},{"name":"Hora 8","start":"12:19","end":"13:19","startHours":12.324707195877334,"endHours":13.324707195877334,"planetary_lord":"Mars"},{"name":"Hora 9","start":"13:19","end":"14:19","startHours":13.324707195877334,"endHours":14.324707195877334,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"14:19","end":"15:19","startHours":14.324707195877334,"endHours":15.324707195877334,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"15:19","end":"16:19","startHours":15.324707195877334,"endHours":16.324707195877334,"planetary_lord":"Moon"},{"name":"Hora 12","start":"16:19","end":"17:19","startHours":16.324707195877334,"endHours":17.324707195877334,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"17:19","end":"18:19","startHours":17.324707195877334,"endHours":18.324707195877334,"planetary_lord":"Venus"},{"name":"Hora 14","start":"18:19","end":"19:19","startHours":18.324707195877334,"endHours":19.324707195877334,"planetary_lord":"Sun"},{"name":"Hora 15","start":"19:19","end":"20:19","startHours":19.324707195877334,"endHours":20.324707195877334,"planetary_lord":"Mars"},{"name":"Hora 16","start":"20:19","end":"21:19","startHours":20.324707195877334,"endHours":21.324707195877334,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"21:19","end":"22:19","startHours":21.324707195877334,"endHours":22.324707195877334,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"22:19","end":"23:19","startHours":22.324707195877334,"endHours":23.324707195877334,"planetary_lord":"Moon"},{"name":"Hora 19","start":"23:19","end":"00:19","startHours":23.324707195877334,"endHours":24.324707195877334,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"00:19","end":"01:19","startHours":24.324707195877334,"endHours":25.324707195877334,"planetary_lord":"Venus"},{"name":"Hora 21","start":"01:19","end":"02:19","startHours":25.324707195877334,"endHours":26.324707195877334,"planetary_lord":"Sun"},{"name":"Hora 22","start":"02:19","end":"03:19","startHours":26.324707195877334,"endHours":27.324707195877334,"planetary_lord":"Mars"},{"name":"Hora 23","start":"03:19","end":"04:19","startHours":27.324707195877334,"endHours":28.324707195877334,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"04:19","end":"05:19","startHours":28.324707195877334,"endHours":29.324707195877334,"planetary_lord":"Saturn"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Revatī"],"unfavorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Citrā","Svātī","Viśākhā","Anurādhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Siṃha","Kanyā","Dhanu","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Karka","Tulā","Vṛścika","Kumbha"]},"dishaShool":"North (Uttara)","chandraVasa":"South-West","rahuVasa":"North","anandadiYoga":{"name":"Dhvānkṣa","quality":"Inauspicious"},"tropicalRitu":"Śarad (Autumn) (tropical)","vedicRitu":"Śarad (Autumn)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-14.271799281658705,"eotMinutes":16.45277955052819,"ayanamsa":26.3791}},"calendars":{"vikram_samvat":2237,"vikram_samvatsara":"Vijaya","saka_samvat":2102,"saka_samvatsara":"Vikrama","bengali_samvat":1587,"malayalam_era":1356,"nanakshahi_year":711,"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":"Tulā (Aippasi)","ritu":"Śarad (Autumn)","display_summary":"Āśvina Śukla Trayodaśī · Vikram 2237 Vijaya · Śaka 2102 Vikrama"},"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":"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 October 31, 2180 CE · Perth, Australia · Vidhyamitra","description":"October 31, 2180 CE for Perth, Australia: Śukla Trayodaśī, sūryodaya 05:19, sūryāsta 18:41.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2180-10-31","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2180-10-31","sa":"https://sa.vidhyamitra.com/city/perth/2180-10-31","hi":"https://hi.vidhyamitra.com/city/perth/2180-10-31","x-default":"https://vidhyamitra.com/city/perth/2180-10-31"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T03:55:57.962Z","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":"2026-06-01T03:55:57.962Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T03:55:57.962Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}