{"id":"vidhyamitra:city-day:perth:2181-09-28:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2181-09-28","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2181-09-28","date_display":"September 28, 2181 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":2181,"month":9,"day":28,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2517924.770833,"kali_year":5283,"ahargana":1929459.2708,"sun":{"sidereal_longitude":157.8395,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":39.2296,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":21,"name":"Ṣaṣṭhī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Ṣaṣṭhī","elongation_degrees":241.3901,"elapsed_within_tithi_degrees":1.3901},"nakshatra":{"number":3,"name":"Kṛttikā","pada":4,"moon_longitude":39.2296,"elapsed_within_degrees":12.5629},"yoga":{"number":15,"name":"Vajra","sum_longitude":197.069},"karana":{"half_tithi_index":40,"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":2181,"month":9,"day":28,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2517924.770833,"ahargana":1929459.2708,"kali_year":5283,"ayanamsa_lahiri":26.3918,"grahas":{"sun":{"sidereal_longitude":159.023815,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"moon":{"sidereal_longitude":38.60871500000002,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":4},"retrograde":false,"latitude":-2.3339},"mars":{"sidereal_longitude":174.10251500000004,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":141.336815,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":131.683515,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":201.61011499999995,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":94.42971499999999,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":187.9626,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":7.9626,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","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":2181,"month":9,"day":28,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2517924.770833,"kali_year":5283,"ahargana":1929459.2708,"sun":{"sidereal_longitude":157.8395,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":39.2296,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":21,"name":"Ṣaṣṭhī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Ṣaṣṭhī","elongation_degrees":241.3901,"elapsed_within_tithi_degrees":1.3901},"nakshatra":{"number":3,"name":"Kṛttikā","pada":4,"moon_longitude":39.2296,"elapsed_within_degrees":12.5629},"yoga":{"number":15,"name":"Vajra","sum_longitude":197.069},"karana":{"half_tithi_index":40,"name":"Gara"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.334,"elongation":118.61},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.334,"opposition_distance":61.39}},"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":"18:16","solarNoonLocal":"12:06","dayLengthHours":12.310043986618282,"dayLengthDisplay":"12 Hours 18 Mins 36 Secs","nightLengthDisplay":"11 Hours 41 Mins 24 Secs","moonriseLocal":"22:57","moonsetLocal":"09:12","rahuKala":{"name":"Rāhu Kāla","start":"10:34","end":"12:06","startHours":10.56753134320909,"endHours":12.106286841536377,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"15:11","end":"16:43","startHours":15.183797838190948,"endHours":16.72255333651823,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:29","end":"09:02","startHours":7.4900203465545205,"endHours":9.028775844881807,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:49","end":"09:14","startHours":8.823608445104835,"endHours":9.233943244658777,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:28","end":"06:48","startHours":6.464183347669664,"endHours":6.792451187312818,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:42","end":"12:31","startHours":11.695952041982435,"endHours":12.51662164109032,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:19","end":"05:08","startHours":4.309925650011464,"endHours":5.13059524911935,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:56","end":"05:57","startHours":4.925427849342379,"endHours":5.951264848227235,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:09","end":"14:59","startHours":14.157960839306089,"endHours":14.978630438413974,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:04","end":"18:28","startHours":18.06130883484552,"endHours":18.461308834845518,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:16","end":"18:46","startHours":18.26130883484552,"endHours":18.774227334287946,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:01","end":"19:46","startHours":18.01130883484552,"endHours":19.76130883484552,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:42","end":"00:31","startHours":23.695952041982434,"endHours":24.51662164109032,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"05:57","end":"07:29","startHours":5.951264848227235,"endHours":7.4900203465545205,"quality":"neutral"},{"name":"Labha","start":"07:29","end":"09:02","startHours":7.4900203465545205,"endHours":9.028775844881807,"quality":"auspicious"},{"name":"Amṛta","start":"09:02","end":"10:34","startHours":9.028775844881807,"endHours":10.56753134320909,"quality":"auspicious"},{"name":"Kāla","start":"10:34","end":"12:06","startHours":10.56753134320909,"endHours":12.106286841536377,"quality":"inauspicious"},{"name":"Śubha","start":"12:06","end":"13:39","startHours":12.106286841536377,"endHours":13.64504233986366,"quality":"auspicious"},{"name":"Roga","start":"13:39","end":"15:11","startHours":13.64504233986366,"endHours":15.183797838190948,"quality":"inauspicious"},{"name":"Udveg","start":"15:11","end":"16:43","startHours":15.183797838190948,"endHours":16.72255333651823,"quality":"inauspicious"},{"name":"Chala","start":"16:43","end":"18:16","startHours":16.72255333651823,"endHours":18.26130883484552,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"18:16","end":"19:43","startHours":18.26130883484552,"endHours":19.72255333651823,"quality":"inauspicious"},{"name":"Udveg","start":"19:43","end":"21:11","startHours":19.72255333651823,"endHours":21.183797838190948,"quality":"inauspicious"},{"name":"Chala","start":"21:11","end":"22:39","startHours":21.183797838190948,"endHours":22.645042339863664,"quality":"neutral"},{"name":"Labha","start":"22:39","end":"00:06","startHours":22.645042339863664,"endHours":24.106286841536377,"quality":"auspicious"},{"name":"Amṛta","start":"00:06","end":"01:34","startHours":24.106286841536377,"endHours":25.56753134320909,"quality":"auspicious"},{"name":"Kāla","start":"01:34","end":"03:02","startHours":25.56753134320909,"endHours":27.028775844881807,"quality":"inauspicious"},{"name":"Śubha","start":"03:02","end":"04:29","startHours":27.028775844881807,"endHours":28.490020346554523,"quality":"auspicious"},{"name":"Roga","start":"04:29","end":"05:57","startHours":28.490020346554523,"endHours":29.951264848227236,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:57","end":"06:57","startHours":5.951264848227235,"endHours":6.951264848227235,"planetary_lord":"Venus"},{"name":"Hora 2","start":"06:57","end":"07:57","startHours":6.951264848227235,"endHours":7.951264848227235,"planetary_lord":"Sun"},{"name":"Hora 3","start":"07:57","end":"08:57","startHours":7.951264848227235,"endHours":8.951264848227236,"planetary_lord":"Mars"},{"name":"Hora 4","start":"08:57","end":"09:57","startHours":8.951264848227236,"endHours":9.951264848227236,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"09:57","end":"10:57","startHours":9.951264848227236,"endHours":10.951264848227236,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"10:57","end":"11:57","startHours":10.951264848227236,"endHours":11.951264848227236,"planetary_lord":"Moon"},{"name":"Hora 7","start":"11:57","end":"12:57","startHours":11.951264848227236,"endHours":12.951264848227236,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"12:57","end":"13:57","startHours":12.951264848227236,"endHours":13.951264848227236,"planetary_lord":"Venus"},{"name":"Hora 9","start":"13:57","end":"14:57","startHours":13.951264848227236,"endHours":14.951264848227236,"planetary_lord":"Sun"},{"name":"Hora 10","start":"14:57","end":"15:57","startHours":14.951264848227236,"endHours":15.951264848227236,"planetary_lord":"Mars"},{"name":"Hora 11","start":"15:57","end":"16:57","startHours":15.951264848227236,"endHours":16.951264848227236,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"16:57","end":"17:57","startHours":16.951264848227236,"endHours":17.951264848227236,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"17:57","end":"18:57","startHours":17.951264848227236,"endHours":18.951264848227236,"planetary_lord":"Moon"},{"name":"Hora 14","start":"18:57","end":"19:57","startHours":18.951264848227236,"endHours":19.951264848227236,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"19:57","end":"20:57","startHours":19.951264848227236,"endHours":20.951264848227236,"planetary_lord":"Venus"},{"name":"Hora 16","start":"20:57","end":"21:57","startHours":20.951264848227236,"endHours":21.951264848227236,"planetary_lord":"Sun"},{"name":"Hora 17","start":"21:57","end":"22:57","startHours":21.951264848227236,"endHours":22.951264848227236,"planetary_lord":"Mars"},{"name":"Hora 18","start":"22:57","end":"23:57","startHours":22.951264848227236,"endHours":23.951264848227236,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"23:57","end":"00:57","startHours":23.951264848227236,"endHours":24.951264848227236,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"00:57","end":"01:57","startHours":24.951264848227236,"endHours":25.951264848227236,"planetary_lord":"Moon"},{"name":"Hora 21","start":"01:57","end":"02:57","startHours":25.951264848227236,"endHours":26.951264848227236,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"02:57","end":"03:57","startHours":26.951264848227236,"endHours":27.951264848227236,"planetary_lord":"Venus"},{"name":"Hora 23","start":"03:57","end":"04:57","startHours":27.951264848227236,"endHours":28.951264848227236,"planetary_lord":"Sun"},{"name":"Hora 24","start":"04:57","end":"05:57","startHours":28.951264848227236,"endHours":29.951264848227236,"planetary_lord":"Mars"}],"taraBala":{"favorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Hasta","Citrā","Svātī","Viśākhā","Anurādhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Karka","Tulā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Siṃha","Kanyā","Dhanu","Makara"]},"dishaShool":"West (Paścim)","chandraVasa":"South-East","rahuVasa":"South-East","anandadiYoga":{"name":"Gada","quality":"Inauspicious"},"tropicalRitu":"Śarad (Autumn) (tropical)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-2.1512654506056714,"eotMinutes":10.180789507817288,"ayanamsa":26.3918}},"calendars":{"vikram_samvat":2238,"vikram_samvatsara":"Jaya","saka_samvat":2103,"saka_samvatsara":"Vṛṣa","bengali_samvat":1588,"malayalam_era":1357,"nanakshahi_year":712,"lunar_month":"Āśvina","lunar_month_paksha_full":"Āśvina Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Āśvina","lunar_month_amanta":"Bhādrapada","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 Kṛṣṇa Ṣaṣṭhī · Vikram 2238 Jaya · Śaka 2103 Vṛṣa"},"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":[{"historical_date":"-3137-10-04","event":"Mahābhārata Day 1 (Bhagavad Gītā delivered)","chart_id":"krishna","shared_marker":"same Kṛttikā","url":"/day/-3137-10-04","relevance":0.5},{"historical_date":"-3137-12-25","event":"Bhīṣma's Mahaprasthan","chart_id":"bhishma","shared_marker":"same Kṛttikā","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 28, 2181 CE · Perth, Australia · Vidhyamitra","description":"September 28, 2181 CE for Perth, Australia: Kṛṣṇa Ṣaṣṭhī, sūryodaya 05:57, sūryāsta 18:16.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2181-09-28","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2181-09-28","sa":"https://sa.vidhyamitra.com/city/perth/2181-09-28","hi":"https://hi.vidhyamitra.com/city/perth/2181-09-28","x-default":"https://vidhyamitra.com/city/perth/2181-09-28"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T06:42:30.141Z","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":"2026-05-31T06:42:30.141Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T06:42:30.141Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}