{"id":"vidhyamitra:city-day:perth:1913-08-31:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1913-08-31","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1913-08-31","date_display":"August 31, 1913 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":1913,"month":8,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2420010.770833,"kali_year":5015,"ahargana":1831545.2708,"sun":{"sidereal_longitude":133.8956,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":122.2967,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":30,"name":"Amāvasyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Amāvasyā","elongation_degrees":348.4011,"elapsed_within_tithi_degrees":0.4011},"nakshatra":{"number":10,"name":"Maghā","pada":1,"moon_longitude":122.2967,"elapsed_within_degrees":2.2967},"yoga":{"number":20,"name":"Śiva","sum_longitude":256.1924},"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":1913,"month":8,"day":31,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2420010.770833,"ahargana":1831545.2708,"kali_year":5015,"ayanamsa_lahiri":22.6469,"grahas":{"sun":{"sidereal_longitude":134.37225,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":122.68195000000003,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false,"latitude":2.4898},"mars":{"sidereal_longitude":59.47505000000001,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":120.65414999999996,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":256.5487499999999,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":1},"retrograde":true},"venus":{"sidereal_longitude":96.98635000000002,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":55.48795000000001,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":335.9175,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":155.9175,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","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":1913,"month":8,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2420010.770833,"kali_year":5015,"ahargana":1831545.2708,"sun":{"sidereal_longitude":133.8956,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":122.2967,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":30,"name":"Amāvasyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Amāvasyā","elongation_degrees":348.4011,"elapsed_within_tithi_degrees":0.4011},"nakshatra":{"number":10,"name":"Maghā","pada":1,"moon_longitude":122.2967,"elapsed_within_degrees":2.2967},"yoga":{"number":20,"name":"Śiva","sum_longitude":256.1924},"karana":{"half_tithi_index":58,"name":"Catuṣpāda"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.49,"elongation":11.599},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.49,"opposition_distance":168.401}},"eclipse_window_40days":[{"offset_days":1,"type":"solar","occurs":true,"moon_latitude":1.476,"elongation":1.842}]},"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":"06:35","sunsetLocal":"17:58","solarNoonLocal":"12:16","dayLengthHours":11.382896276678288,"dayLengthDisplay":"11 Hours 22 Mins 58 Secs","nightLengthDisplay":"12 Hours 37 Mins 02 Secs","moonriseLocal":"06:00","moonsetLocal":"16:59","rahuKala":{"name":"Rāhu Kāla","start":"16:33","end":"17:58","startHours":16.54212627836457,"endHours":17.964988312949355,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:16","end":"13:42","startHours":12.273540174610211,"endHours":13.696402209194996,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:07","end":"16:33","startHours":15.119264243779782,"endHours":16.54212627836457,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:14","end":"09:37","startHours":9.238101167496001,"endHours":9.617531043385277,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:03","end":"07:22","startHours":7.056379381132662,"endHours":7.359923281844083,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:54","end":"12:39","startHours":11.894110298720936,"endHours":12.652970050499487,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:04","end":"05:49","startHours":5.0643725327139615,"endHours":5.823232284492514,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:38","end":"06:35","startHours":5.633517346547876,"endHours":6.582092036271066,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:10","end":"14:56","startHours":14.170689554056592,"endHours":14.929549305835145,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:46","end":"18:10","startHours":17.764988312949356,"endHours":18.164988312949355,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:58","end":"18:26","startHours":17.964988312949355,"endHours":18.43927565781095,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:43","end":"19:28","startHours":17.714988312949355,"endHours":19.464988312949355,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:54","end":"00:39","startHours":23.894110298720936,"endHours":24.652970050499487,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:35","end":"08:00","startHours":6.582092036271066,"endHours":8.004954070855852,"quality":"inauspicious"},{"name":"Chala","start":"08:00","end":"09:26","startHours":8.004954070855852,"endHours":9.427816105440638,"quality":"neutral"},{"name":"Labha","start":"09:26","end":"10:51","startHours":9.427816105440638,"endHours":10.850678140025424,"quality":"auspicious"},{"name":"Amṛta","start":"10:51","end":"12:16","startHours":10.850678140025424,"endHours":12.273540174610211,"quality":"auspicious"},{"name":"Kāla","start":"12:16","end":"13:42","startHours":12.273540174610211,"endHours":13.696402209194996,"quality":"inauspicious"},{"name":"Śubha","start":"13:42","end":"15:07","startHours":13.696402209194996,"endHours":15.119264243779782,"quality":"auspicious"},{"name":"Roga","start":"15:07","end":"16:33","startHours":15.119264243779782,"endHours":16.54212627836457,"quality":"inauspicious"},{"name":"Udveg","start":"16:33","end":"17:58","startHours":16.54212627836457,"endHours":17.964988312949355,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"17:58","end":"19:33","startHours":17.964988312949355,"endHours":19.54212627836457,"quality":"auspicious"},{"name":"Roga","start":"19:33","end":"21:07","startHours":19.54212627836457,"endHours":21.11926424377978,"quality":"inauspicious"},{"name":"Udveg","start":"21:07","end":"22:42","startHours":21.11926424377978,"endHours":22.696402209194996,"quality":"inauspicious"},{"name":"Chala","start":"22:42","end":"00:16","startHours":22.696402209194996,"endHours":24.27354017461021,"quality":"neutral"},{"name":"Labha","start":"00:16","end":"01:51","startHours":24.27354017461021,"endHours":25.850678140025426,"quality":"auspicious"},{"name":"Amṛta","start":"01:51","end":"03:26","startHours":25.850678140025426,"endHours":27.42781610544064,"quality":"auspicious"},{"name":"Kāla","start":"03:26","end":"05:00","startHours":27.42781610544064,"endHours":29.004954070855852,"quality":"inauspicious"},{"name":"Śubha","start":"05:00","end":"06:35","startHours":29.004954070855852,"endHours":30.582092036271067,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:35","end":"07:35","startHours":6.582092036271066,"endHours":7.582092036271066,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:35","end":"08:35","startHours":7.582092036271066,"endHours":8.582092036271067,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:35","end":"09:35","startHours":8.582092036271067,"endHours":9.582092036271067,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:35","end":"10:35","startHours":9.582092036271067,"endHours":10.582092036271067,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:35","end":"11:35","startHours":10.582092036271067,"endHours":11.582092036271067,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:35","end":"12:35","startHours":11.582092036271067,"endHours":12.582092036271067,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:35","end":"13:35","startHours":12.582092036271067,"endHours":13.582092036271067,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:35","end":"14:35","startHours":13.582092036271067,"endHours":14.582092036271067,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:35","end":"15:35","startHours":14.582092036271067,"endHours":15.582092036271067,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:35","end":"16:35","startHours":15.582092036271067,"endHours":16.582092036271067,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:35","end":"17:35","startHours":16.582092036271067,"endHours":17.582092036271067,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:35","end":"18:35","startHours":17.582092036271067,"endHours":18.582092036271067,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:35","end":"19:35","startHours":18.582092036271067,"endHours":19.582092036271067,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:35","end":"20:35","startHours":19.582092036271067,"endHours":20.582092036271067,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:35","end":"21:35","startHours":20.582092036271067,"endHours":21.582092036271067,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:35","end":"22:35","startHours":21.582092036271067,"endHours":22.582092036271067,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:35","end":"23:35","startHours":22.582092036271067,"endHours":23.582092036271067,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:35","end":"00:35","startHours":23.582092036271067,"endHours":24.582092036271067,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:35","end":"01:35","startHours":24.582092036271067,"endHours":25.582092036271067,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:35","end":"02:35","startHours":25.582092036271067,"endHours":26.582092036271067,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:35","end":"03:35","startHours":26.582092036271067,"endHours":27.582092036271067,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:35","end":"04:35","startHours":27.582092036271067,"endHours":28.582092036271067,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:35","end":"05:35","startHours":28.582092036271067,"endHours":29.582092036271067,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:35","end":"06:35","startHours":29.582092036271067,"endHours":30.582092036271067,"planetary_lord":"Jupiter"}],"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","Siṃha","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Kanyā","Vṛścika","Dhanu","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"West","rahuVasa":"North-East","anandadiYoga":{"name":"Mudgara","quality":"Inauspicious"},"tropicalRitu":"Varṣā (Monsoon) (tropical)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":8.93327221185242,"eotMinutes":0.14558952338733633,"ayanamsa":22.6469}},"calendars":{"vikram_samvat":1970,"vikram_samvatsara":"Akṣaya","saka_samvat":1835,"saka_samvatsara":"Pramādī","bengali_samvat":1320,"malayalam_era":1089,"nanakshahi_year":444,"lunar_month":"Bhādrapada","lunar_month_paksha_full":"Bhādrapada Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Bhādrapada","lunar_month_amanta":"Śrāvaṇa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Siṃha (Āvaṇi)","ritu":"Varṣā (Monsoon)","display_summary":"Bhādrapada Kṛṣṇa Amāvasyā · Vikram 1970 Akṣaya · Śaka 1835 Pramādī"},"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 August 31, 1913 CE · Perth, Australia · Vidhyamitra","description":"August 31, 1913 CE for Perth, Australia: Kṛṣṇa Amāvasyā, sūryodaya 06:35, sūryāsta 17:58.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1913-08-31","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1913-08-31","sa":"https://sa.vidhyamitra.com/city/perth/1913-08-31","hi":"https://hi.vidhyamitra.com/city/perth/1913-08-31","x-default":"https://vidhyamitra.com/city/perth/1913-08-31"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-03T09:24:37.862Z","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":"2026-06-03T09:24:37.862Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-03T09:24:37.862Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}