{"id":"vidhyamitra:city-day:perth:1981-03-09:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1981-03-09","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-03-09","date_display":"March 9, 1981 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":1981,"month":3,"day":9,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444672.770833,"kali_year":5082,"ahargana":1856207.2708,"sun":{"sidereal_longitude":325.0112,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":358.3145,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":3,"name":"Tṛtīyā","paksha":"Śukla","full_name":"Śukla Tṛtīyā","elongation_degrees":33.3033,"elapsed_within_tithi_degrees":9.3033},"nakshatra":{"number":27,"name":"Revatī","pada":4,"moon_longitude":358.3145,"elapsed_within_degrees":11.6478},"yoga":{"number":25,"name":"Brahma","sum_longitude":323.3257},"karana":{"half_tithi_index":5,"name":"Gara"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"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":1981,"month":3,"day":9,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444672.770833,"ahargana":1856207.2708,"kali_year":5082,"ayanamsa_lahiri":23.5902,"grahas":{"sun":{"sidereal_longitude":324.79678,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":0.6905800000000113,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":1},"retrograde":false,"latitude":-4.2036},"mars":{"sidereal_longitude":330.38678000000004,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":298.73648000000003,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":164.11698,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"venus":{"sidereal_longitude":317.69007999999997,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":164.00958000000003,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":109.2061,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":289.2061,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":1981,"month":3,"day":9,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444672.770833,"kali_year":5082,"ahargana":1856207.2708,"sun":{"sidereal_longitude":325.0112,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":358.3145,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":3,"name":"Tṛtīyā","paksha":"Śukla","full_name":"Śukla Tṛtīyā","elongation_degrees":33.3033,"elapsed_within_tithi_degrees":9.3033},"nakshatra":{"number":27,"name":"Revatī","pada":4,"moon_longitude":358.3145,"elapsed_within_degrees":11.6478},"yoga":{"number":25,"name":"Brahma","sum_longitude":323.3257},"karana":{"half_tithi_index":5,"name":"Gara"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.204,"elongation":33.303},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.204,"opposition_distance":146.697}},"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":"06:12","sunsetLocal":"18:43","solarNoonLocal":"12:28","dayLengthHours":12.51439286520095,"dayLengthDisplay":"12 Hours 30 Mins 52 Secs","nightLengthDisplay":"11 Hours 29 Mins 08 Secs","moonriseLocal":"09:12","moonsetLocal":"20:30","rahuKala":{"name":"Rāhu Kāla","start":"07:46","end":"09:20","startHours":7.771083488164029,"endHours":9.335382596314147,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:54","end":"12:28","startHours":10.899681704464268,"endHours":12.463980812614386,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:02","end":"15:36","startHours":14.028279920764504,"endHours":15.592579028914624,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:08","end":"09:33","startHours":9.126809381894132,"endHours":9.543955810734165,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:44","end":"07:04","startHours":6.72821741606395,"endHours":7.061934559135976,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:03","end":"12:53","startHours":12.046834383774355,"endHours":12.881127241454417,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:32","end":"05:22","startHours":4.538198664653784,"endHours":5.372491522333847,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:10","end":"06:12","startHours":5.163918307913832,"endHours":6.206784380013911,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:33","end":"15:23","startHours":14.549712956814544,"endHours":15.384005814494607,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:31","end":"18:55","startHours":18.52117724521486,"endHours":18.92117724521486,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:43","end":"19:15","startHours":18.72117724521486,"endHours":19.242610281264902,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:28","end":"20:13","startHours":18.47117724521486,"endHours":20.22117724521486,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:03","end":"00:53","startHours":24.046834383774357,"endHours":24.88112724145442,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"06:12","end":"07:46","startHours":6.206784380013911,"endHours":7.771083488164029,"quality":"auspicious"},{"name":"Kāla","start":"07:46","end":"09:20","startHours":7.771083488164029,"endHours":9.335382596314147,"quality":"inauspicious"},{"name":"Śubha","start":"09:20","end":"10:54","startHours":9.335382596314147,"endHours":10.899681704464268,"quality":"auspicious"},{"name":"Roga","start":"10:54","end":"12:28","startHours":10.899681704464268,"endHours":12.463980812614386,"quality":"inauspicious"},{"name":"Udveg","start":"12:28","end":"14:02","startHours":12.463980812614386,"endHours":14.028279920764504,"quality":"inauspicious"},{"name":"Chala","start":"14:02","end":"15:36","startHours":14.028279920764504,"endHours":15.592579028914624,"quality":"neutral"},{"name":"Labha","start":"15:36","end":"17:09","startHours":15.592579028914624,"endHours":17.156878137064744,"quality":"auspicious"},{"name":"Amṛta","start":"17:09","end":"18:43","startHours":17.156878137064744,"endHours":18.72117724521486,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"18:43","end":"20:09","startHours":18.72117724521486,"endHours":20.15687813706474,"quality":"neutral"},{"name":"Labha","start":"20:09","end":"21:36","startHours":20.15687813706474,"endHours":21.592579028914624,"quality":"auspicious"},{"name":"Amṛta","start":"21:36","end":"23:02","startHours":21.592579028914624,"endHours":23.028279920764504,"quality":"auspicious"},{"name":"Kāla","start":"23:02","end":"00:28","startHours":23.028279920764504,"endHours":24.463980812614388,"quality":"inauspicious"},{"name":"Śubha","start":"00:28","end":"01:54","startHours":24.463980812614388,"endHours":25.899681704464268,"quality":"auspicious"},{"name":"Roga","start":"01:54","end":"03:20","startHours":25.899681704464268,"endHours":27.335382596314147,"quality":"inauspicious"},{"name":"Udveg","start":"03:20","end":"04:46","startHours":27.335382596314147,"endHours":28.77108348816403,"quality":"inauspicious"},{"name":"Chala","start":"04:46","end":"06:12","startHours":28.77108348816403,"endHours":30.20678438001391,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"06:12","end":"07:12","startHours":6.206784380013911,"endHours":7.206784380013911,"planetary_lord":"Moon"},{"name":"Hora 2","start":"07:12","end":"08:12","startHours":7.206784380013911,"endHours":8.20678438001391,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"08:12","end":"09:12","startHours":8.20678438001391,"endHours":9.20678438001391,"planetary_lord":"Venus"},{"name":"Hora 4","start":"09:12","end":"10:12","startHours":9.20678438001391,"endHours":10.20678438001391,"planetary_lord":"Sun"},{"name":"Hora 5","start":"10:12","end":"11:12","startHours":10.20678438001391,"endHours":11.20678438001391,"planetary_lord":"Mars"},{"name":"Hora 6","start":"11:12","end":"12:12","startHours":11.20678438001391,"endHours":12.20678438001391,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"12:12","end":"13:12","startHours":12.20678438001391,"endHours":13.20678438001391,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"13:12","end":"14:12","startHours":13.20678438001391,"endHours":14.20678438001391,"planetary_lord":"Moon"},{"name":"Hora 9","start":"14:12","end":"15:12","startHours":14.20678438001391,"endHours":15.20678438001391,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"15:12","end":"16:12","startHours":15.20678438001391,"endHours":16.20678438001391,"planetary_lord":"Venus"},{"name":"Hora 11","start":"16:12","end":"17:12","startHours":16.20678438001391,"endHours":17.20678438001391,"planetary_lord":"Sun"},{"name":"Hora 12","start":"17:12","end":"18:12","startHours":17.20678438001391,"endHours":18.20678438001391,"planetary_lord":"Mars"},{"name":"Hora 13","start":"18:12","end":"19:12","startHours":18.20678438001391,"endHours":19.20678438001391,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"19:12","end":"20:12","startHours":19.20678438001391,"endHours":20.20678438001391,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"20:12","end":"21:12","startHours":20.20678438001391,"endHours":21.20678438001391,"planetary_lord":"Moon"},{"name":"Hora 16","start":"21:12","end":"22:12","startHours":21.20678438001391,"endHours":22.20678438001391,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"22:12","end":"23:12","startHours":22.20678438001391,"endHours":23.20678438001391,"planetary_lord":"Venus"},{"name":"Hora 18","start":"23:12","end":"00:12","startHours":23.20678438001391,"endHours":24.20678438001391,"planetary_lord":"Sun"},{"name":"Hora 19","start":"00:12","end":"01:12","startHours":24.20678438001391,"endHours":25.20678438001391,"planetary_lord":"Mars"},{"name":"Hora 20","start":"01:12","end":"02:12","startHours":25.20678438001391,"endHours":26.20678438001391,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"02:12","end":"03:12","startHours":26.20678438001391,"endHours":27.20678438001391,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"03:12","end":"04:12","startHours":27.20678438001391,"endHours":28.20678438001391,"planetary_lord":"Moon"},{"name":"Hora 23","start":"04:12","end":"05:12","startHours":28.20678438001391,"endHours":29.20678438001391,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"05:12","end":"06:12","startHours":29.20678438001391,"endHours":30.20678438001391,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"unfavorable_nakshatras":["Ārdrā","Punarvasu","Puṣya","Aśleṣā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","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":"East (Pūrva)","chandraVasa":"East","rahuVasa":"North-East","anandadiYoga":{"name":"Dhūmra","quality":"Inauspicious"},"drikRitu":"Śiśira (Winter) (Drik)","vedicRitu":"Śiśira (Winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-4.592230087070879,"eotMinutes":-11.280848756863184,"ayanamsa":23.5902}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Phālguna","lunar_month_paksha_full":"Phālguna Śukla Pakṣa","solar_month":"Kumbha (Māsi)","ritu":"Śiśira (Winter)","display_summary":"Phālguna Śukla Tṛtīyā · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"kumbha-sankranti","name":"Kumbha Saṅkrānti","name_sanskrit":"कुम्भ सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Aquarius; Kumbha-māsa begins.","vrata":false,"detection":{"sun_rashi":"Kumbha"},"precedence":5}],"todays_walk":{"walk":{"id":"chandra-walk","name":"Candra Walk","name_sanskrit":"चन्द्र यात्रा","type":"graha","description":"Manas-control + BG 6.5-7.","step_count":5,"url":"/walk/chandra-walk"},"reason":"Somavāra (Monday) — 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 March 9, 1981 CE · Perth, Australia · Vidhyamitra","description":"March 9, 1981 CE for Perth, Australia: Śukla Tṛtīyā, sūryodaya 06:12, sūryāsta 18:43.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1981-03-09","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1981-03-09","sa":"https://sa.vidhyamitra.com/city/perth/1981-03-09","hi":"https://hi.vidhyamitra.com/city/perth/1981-03-09","x-default":"https://vidhyamitra.com/city/perth/1981-03-09"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-19T22:12:59.485Z","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":"2026-05-19T22:12:59.485Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-19T22:12:59.485Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}