{"id":"vidhyamitra:city-day:perth:1917-07-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1917-07-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1917-07-13","date_display":"July 13, 1917 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":1917,"month":7,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2421422.770833,"kali_year":5019,"ahargana":1832957.2708,"sun":{"sidereal_longitude":87.1348,"rashi":3,"rashi_name":"Mithuna"},"moon":{"sidereal_longitude":14.1899,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":24,"name":"Navamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Navamī","elongation_degrees":287.0551,"elapsed_within_tithi_degrees":11.0551},"nakshatra":{"number":2,"name":"Bharaṇī","pada":1,"moon_longitude":14.1899,"elapsed_within_degrees":0.8566},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":101.3248},"karana":{"half_tithi_index":47,"name":"Gara"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"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":1917,"month":7,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2421422.770833,"ahargana":1832957.2708,"kali_year":5019,"ayanamsa_lahiri":22.7009,"grahas":{"sun":{"sidereal_longitude":87.35720099999998,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":3},"retrograde":false},"moon":{"sidereal_longitude":16.60770100000002,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":1},"retrograde":false,"latitude":4.1389},"mars":{"sidereal_longitude":58.16090099999997,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":88.92250100000001,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":40.53750100000002,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":1},"retrograde":false},"venus":{"sidereal_longitude":109.32760100000002,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":100.06300099999999,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":261.103,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":81.103,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","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":1917,"month":7,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2421422.770833,"kali_year":5019,"ahargana":1832957.2708,"sun":{"sidereal_longitude":87.1348,"rashi":3,"rashi_name":"Mithuna"},"moon":{"sidereal_longitude":14.1899,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":24,"name":"Navamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Navamī","elongation_degrees":287.0551,"elapsed_within_tithi_degrees":11.0551},"nakshatra":{"number":2,"name":"Bharaṇī","pada":1,"moon_longitude":14.1899,"elapsed_within_degrees":0.8566},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":101.3248},"karana":{"half_tithi_index":47,"name":"Gara"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.139,"elongation":72.945},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.139,"opposition_distance":107.055}},"eclipse_window_40days":[{"offset_days":-8,"type":"lunar","occurs":true,"moon_latitude":-0.102,"opposition_distance":0.664},{"offset_days":6,"type":"solar","occurs":true,"moon_latitude":-0.976,"elongation":0.501}]},"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":"07:16","sunsetLocal":"17:28","solarNoonLocal":"12:22","dayLengthHours":10.205647575377057,"dayLengthDisplay":"10 Hours 12 Mins 20 Secs","nightLengthDisplay":"13 Hours 47 Mins 40 Secs","moonriseLocal":"02:13","moonsetLocal":"13:04","rahuKala":{"name":"Rāhu Kāla","start":"11:05","end":"12:22","startHours":11.089617867180543,"endHours":12.365323814102677,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"14:55","end":"16:12","startHours":14.916735707946941,"endHours":16.19244165486907,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"08:32","end":"09:49","startHours":8.538205973336279,"endHours":9.813911920258413,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:39","end":"09:59","startHours":9.643817794002128,"endHours":9.984006046514697,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:41","end":"07:58","startHours":7.687735342054858,"endHours":7.959885944064913,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:02","end":"12:42","startHours":12.025135561590108,"endHours":12.705512066615245,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:54","end":"06:35","startHours":5.901747016363873,"endHours":6.58212352138901,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:25","end":"07:16","startHours":6.412029395132726,"endHours":7.2625000264141475,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:04","end":"14:45","startHours":14.06626507666552,"endHours":14.746641581690657,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:16","end":"17:40","startHours":17.268147601791206,"endHours":17.668147601791205,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:28","end":"17:54","startHours":17.468147601791205,"endHours":17.893382917431914,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:13","end":"18:58","startHours":17.218147601791205,"endHours":18.968147601791205,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:02","end":"00:42","startHours":24.02513556159011,"endHours":24.705512066615245,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"07:16","end":"08:32","startHours":7.2625000264141475,"endHours":8.538205973336279,"quality":"neutral"},{"name":"Labha","start":"08:32","end":"09:49","startHours":8.538205973336279,"endHours":9.813911920258413,"quality":"auspicious"},{"name":"Amṛta","start":"09:49","end":"11:05","startHours":9.813911920258413,"endHours":11.089617867180543,"quality":"auspicious"},{"name":"Kāla","start":"11:05","end":"12:22","startHours":11.089617867180543,"endHours":12.365323814102677,"quality":"inauspicious"},{"name":"Śubha","start":"12:22","end":"13:38","startHours":12.365323814102677,"endHours":13.641029761024807,"quality":"auspicious"},{"name":"Roga","start":"13:38","end":"14:55","startHours":13.641029761024807,"endHours":14.916735707946941,"quality":"inauspicious"},{"name":"Udveg","start":"14:55","end":"16:12","startHours":14.916735707946941,"endHours":16.19244165486907,"quality":"inauspicious"},{"name":"Chala","start":"16:12","end":"17:28","startHours":16.19244165486907,"endHours":17.468147601791205,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"17:28","end":"19:12","startHours":17.468147601791205,"endHours":19.19244165486907,"quality":"inauspicious"},{"name":"Udveg","start":"19:12","end":"20:55","startHours":19.19244165486907,"endHours":20.91673570794694,"quality":"inauspicious"},{"name":"Chala","start":"20:55","end":"22:38","startHours":20.91673570794694,"endHours":22.64102976102481,"quality":"neutral"},{"name":"Labha","start":"22:38","end":"00:22","startHours":22.64102976102481,"endHours":24.365323814102677,"quality":"auspicious"},{"name":"Amṛta","start":"00:22","end":"02:05","startHours":24.365323814102677,"endHours":26.089617867180543,"quality":"auspicious"},{"name":"Kāla","start":"02:05","end":"03:49","startHours":26.089617867180543,"endHours":27.813911920258413,"quality":"inauspicious"},{"name":"Śubha","start":"03:49","end":"05:32","startHours":27.813911920258413,"endHours":29.538205973336282,"quality":"auspicious"},{"name":"Roga","start":"05:32","end":"07:16","startHours":29.538205973336282,"endHours":31.26250002641415,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:16","end":"08:16","startHours":7.2625000264141475,"endHours":8.262500026414148,"planetary_lord":"Venus"},{"name":"Hora 2","start":"08:16","end":"09:16","startHours":8.262500026414148,"endHours":9.262500026414148,"planetary_lord":"Sun"},{"name":"Hora 3","start":"09:16","end":"10:16","startHours":9.262500026414148,"endHours":10.262500026414148,"planetary_lord":"Mars"},{"name":"Hora 4","start":"10:16","end":"11:16","startHours":10.262500026414148,"endHours":11.262500026414148,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"11:16","end":"12:16","startHours":11.262500026414148,"endHours":12.262500026414148,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"12:16","end":"13:16","startHours":12.262500026414148,"endHours":13.262500026414148,"planetary_lord":"Moon"},{"name":"Hora 7","start":"13:16","end":"14:16","startHours":13.262500026414148,"endHours":14.262500026414148,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"14:16","end":"15:16","startHours":14.262500026414148,"endHours":15.262500026414148,"planetary_lord":"Venus"},{"name":"Hora 9","start":"15:16","end":"16:16","startHours":15.262500026414148,"endHours":16.26250002641415,"planetary_lord":"Sun"},{"name":"Hora 10","start":"16:16","end":"17:16","startHours":16.26250002641415,"endHours":17.26250002641415,"planetary_lord":"Mars"},{"name":"Hora 11","start":"17:16","end":"18:16","startHours":17.26250002641415,"endHours":18.26250002641415,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"18:16","end":"19:16","startHours":18.26250002641415,"endHours":19.26250002641415,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"19:16","end":"20:16","startHours":19.26250002641415,"endHours":20.26250002641415,"planetary_lord":"Moon"},{"name":"Hora 14","start":"20:16","end":"21:16","startHours":20.26250002641415,"endHours":21.26250002641415,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"21:16","end":"22:16","startHours":21.26250002641415,"endHours":22.26250002641415,"planetary_lord":"Venus"},{"name":"Hora 16","start":"22:16","end":"23:16","startHours":22.26250002641415,"endHours":23.26250002641415,"planetary_lord":"Sun"},{"name":"Hora 17","start":"23:16","end":"00:16","startHours":23.26250002641415,"endHours":24.26250002641415,"planetary_lord":"Mars"},{"name":"Hora 18","start":"00:16","end":"01:16","startHours":24.26250002641415,"endHours":25.26250002641415,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"01:16","end":"02:16","startHours":25.26250002641415,"endHours":26.26250002641415,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"02:16","end":"03:16","startHours":26.26250002641415,"endHours":27.26250002641415,"planetary_lord":"Moon"},{"name":"Hora 21","start":"03:16","end":"04:16","startHours":27.26250002641415,"endHours":28.26250002641415,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"04:16","end":"05:16","startHours":28.26250002641415,"endHours":29.26250002641415,"planetary_lord":"Venus"},{"name":"Hora 23","start":"05:16","end":"06:16","startHours":29.26250002641415,"endHours":30.26250002641415,"planetary_lord":"Sun"},{"name":"Hora 24","start":"06:16","end":"07:16","startHours":30.26250002641415,"endHours":31.26250002641415,"planetary_lord":"Mars"}],"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":["Meṣa","Mithuna","Kanyā","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Karka","Siṃha","Vṛścika","Dhanu","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"East","rahuVasa":"South-East","anandadiYoga":{"name":"Mausala","quality":"Inauspicious"},"tropicalRitu":"Grīṣma (Summer) (tropical)","vedicRitu":"Grīṣma (Summer)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":21.938312399650396,"eotMinutes":-5.361428846160681,"ayanamsa":22.7009}},"calendars":{"vikram_samvat":1974,"vikram_samvatsara":"Pramoda","saka_samvat":1839,"saka_samvatsara":"Piṅgala","bengali_samvat":1324,"malayalam_era":1093,"nanakshahi_year":448,"lunar_month":"Śrāvaṇa","lunar_month_paksha_full":"Śrāvaṇa Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Śrāvaṇa","lunar_month_amanta":"Āṣāḍha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mithuna (Āni)","ritu":"Varṣā (Monsoon)","display_summary":"Śrāvaṇa Kṛṣṇa Navamī · Vikram 1974 Pramoda · Śaka 1839 Piṅgala"},"festivals":[],"todays_walk":{"walk":{"id":"shukra-walk","name":"Śukra Walk","name_sanskrit":"शुक्र यात्रा","type":"graha","description":"Beauty + creativity in dharma + BG 10.36.","step_count":5,"url":"/walk/shukra-walk"},"reason":"Śukravāra (Friday) — 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 July 13, 1917 CE · Perth, Australia · Vidhyamitra","description":"July 13, 1917 CE for Perth, Australia: Kṛṣṇa Navamī, sūryodaya 07:16, sūryāsta 17:28.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1917-07-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1917-07-13","sa":"https://sa.vidhyamitra.com/city/perth/1917-07-13","hi":"https://hi.vidhyamitra.com/city/perth/1917-07-13","x-default":"https://vidhyamitra.com/city/perth/1917-07-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T14:49:43.009Z","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":"2026-06-01T14:49:43.009Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T14:49:43.009Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}