{"id":"vidhyamitra:city-day:perth:1973-01-07:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1973-01-07","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1973-01-07","date_display":"January 7, 1973 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":1973,"month":1,"day":7,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441689.770833,"kali_year":5074,"ahargana":1853224.2708,"sun":{"sidereal_longitude":263.009,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":291.4697,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":3,"name":"Tṛtīyā","paksha":"Śukla","full_name":"Śukla Tṛtīyā","elongation_degrees":28.4607,"elapsed_within_tithi_degrees":4.4607},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4,"moon_longitude":291.4697,"elapsed_within_degrees":11.4697},"yoga":{"number":15,"name":"Vajra","sum_longitude":194.4787},"karana":{"half_tithi_index":4,"name":"Taitila"},"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":1973,"month":1,"day":7,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2441689.770833,"ahargana":1853224.2708,"kali_year":5074,"ayanamsa_lahiri":23.4761,"grahas":{"sun":{"sidereal_longitude":263.12285299999996,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":290.08625299999994,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4},"retrograde":false,"latitude":1.8438},"mars":{"sidereal_longitude":221.90945299999998,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":250.56715299999996,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":266.28595300000006,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":240.95505300000002,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":51.718253000000004,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":267.2598,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":87.2598,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","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":1973,"month":1,"day":7,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441689.770833,"kali_year":5074,"ahargana":1853224.2708,"sun":{"sidereal_longitude":263.009,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":291.4697,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":3,"name":"Tṛtīyā","paksha":"Śukla","full_name":"Śukla Tṛtīyā","elongation_degrees":28.4607,"elapsed_within_tithi_degrees":4.4607},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4,"moon_longitude":291.4697,"elapsed_within_degrees":11.4697},"yoga":{"number":15,"name":"Vajra","sum_longitude":194.4787},"karana":{"half_tithi_index":4,"name":"Taitila"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.844,"elongation":28.461},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.844,"opposition_distance":151.539}},"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":"19:27","solarNoonLocal":"12:23","dayLengthHours":14.133510911541102,"dayLengthDisplay":"14 Hours 08 Mins 01 Secs","nightLengthDisplay":"9 Hours 51 Mins 59 Secs","moonriseLocal":"07:25","moonsetLocal":"20:57","rahuKala":{"name":"Rāhu Kāla","start":"17:41","end":"19:27","startHours":17.68090116361824,"endHours":19.447590027560878,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:23","end":"14:09","startHours":12.380834571790327,"endHours":14.147523435732964,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:55","end":"17:41","startHours":15.914212299675604,"endHours":17.68090116361824,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:37","end":"09:05","startHours":8.611898328712702,"endHours":9.083015359097404,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:54","end":"06:17","startHours":5.902975404000657,"endHours":6.279869028308419,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:55","end":"12:51","startHours":11.909717541405623,"endHours":12.851951602175031,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:26","end":"04:22","startHours":3.4296109944809636,"endHours":4.371845055250371,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:08","end":"05:19","startHours":4.136286540058019,"endHours":5.314079116019777,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:44","end":"15:41","startHours":14.736419723713844,"endHours":15.67865378448325,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:15","end":"19:39","startHours":19.24759002756088,"endHours":19.647590027560877,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:27","end":"20:02","startHours":19.447590027560878,"endHours":20.036486315541758,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:12","end":"20:57","startHours":19.197590027560878,"endHours":20.947590027560878,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:55","end":"00:51","startHours":23.909717541405623,"endHours":24.85195160217503,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:19","end":"07:05","startHours":5.314079116019777,"endHours":7.080767979962415,"quality":"inauspicious"},{"name":"Chala","start":"07:05","end":"08:51","startHours":7.080767979962415,"endHours":8.847456843905054,"quality":"neutral"},{"name":"Labha","start":"08:51","end":"10:37","startHours":8.847456843905054,"endHours":10.61414570784769,"quality":"auspicious"},{"name":"Amṛta","start":"10:37","end":"12:23","startHours":10.61414570784769,"endHours":12.380834571790327,"quality":"auspicious"},{"name":"Kāla","start":"12:23","end":"14:09","startHours":12.380834571790327,"endHours":14.147523435732964,"quality":"inauspicious"},{"name":"Śubha","start":"14:09","end":"15:55","startHours":14.147523435732964,"endHours":15.914212299675604,"quality":"auspicious"},{"name":"Roga","start":"15:55","end":"17:41","startHours":15.914212299675604,"endHours":17.68090116361824,"quality":"inauspicious"},{"name":"Udveg","start":"17:41","end":"19:27","startHours":17.68090116361824,"endHours":19.447590027560878,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"19:27","end":"20:41","startHours":19.447590027560878,"endHours":20.68090116361824,"quality":"auspicious"},{"name":"Roga","start":"20:41","end":"21:55","startHours":20.68090116361824,"endHours":21.914212299675604,"quality":"inauspicious"},{"name":"Udveg","start":"21:55","end":"23:09","startHours":21.914212299675604,"endHours":23.147523435732964,"quality":"inauspicious"},{"name":"Chala","start":"23:09","end":"00:23","startHours":23.147523435732964,"endHours":24.380834571790327,"quality":"neutral"},{"name":"Labha","start":"00:23","end":"01:37","startHours":24.380834571790327,"endHours":25.61414570784769,"quality":"auspicious"},{"name":"Amṛta","start":"01:37","end":"02:51","startHours":25.61414570784769,"endHours":26.84745684390505,"quality":"auspicious"},{"name":"Kāla","start":"02:51","end":"04:05","startHours":26.84745684390505,"endHours":28.080767979962413,"quality":"inauspicious"},{"name":"Śubha","start":"04:05","end":"05:19","startHours":28.080767979962413,"endHours":29.314079116019776,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:19","end":"06:19","startHours":5.314079116019777,"endHours":6.314079116019777,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:19","end":"07:19","startHours":6.314079116019777,"endHours":7.314079116019777,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:19","end":"08:19","startHours":7.314079116019777,"endHours":8.314079116019776,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:19","end":"09:19","startHours":8.314079116019776,"endHours":9.314079116019776,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:19","end":"10:19","startHours":9.314079116019776,"endHours":10.314079116019776,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:19","end":"11:19","startHours":10.314079116019776,"endHours":11.314079116019776,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:19","end":"12:19","startHours":11.314079116019776,"endHours":12.314079116019776,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:19","end":"13:19","startHours":12.314079116019776,"endHours":13.314079116019776,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:19","end":"14:19","startHours":13.314079116019776,"endHours":14.314079116019776,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:19","end":"15:19","startHours":14.314079116019776,"endHours":15.314079116019776,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:19","end":"16:19","startHours":15.314079116019776,"endHours":16.314079116019776,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:19","end":"17:19","startHours":16.314079116019776,"endHours":17.314079116019776,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:19","end":"18:19","startHours":17.314079116019776,"endHours":18.314079116019776,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:19","end":"19:19","startHours":18.314079116019776,"endHours":19.314079116019776,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:19","end":"20:19","startHours":19.314079116019776,"endHours":20.314079116019776,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:19","end":"21:19","startHours":20.314079116019776,"endHours":21.314079116019776,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:19","end":"22:19","startHours":21.314079116019776,"endHours":22.314079116019776,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:19","end":"23:19","startHours":22.314079116019776,"endHours":23.314079116019776,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:19","end":"00:19","startHours":23.314079116019776,"endHours":24.314079116019776,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:19","end":"01:19","startHours":24.314079116019776,"endHours":25.314079116019776,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:19","end":"02:19","startHours":25.314079116019776,"endHours":26.314079116019776,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:19","end":"03:19","startHours":26.314079116019776,"endHours":27.314079116019776,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:19","end":"04:19","startHours":27.314079116019776,"endHours":28.314079116019776,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:19","end":"05:19","startHours":28.314079116019776,"endHours":29.314079116019776,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Citrā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Mithuna","Karka","Tulā","Vṛścika","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Dhanu","Kumbha"]},"dishaShool":"West (Paścim)","chandraVasa":"South-East","rahuVasa":"North-East","anandadiYoga":{"name":"Mausala","quality":"Inauspicious"},"drikRitu":"Hemanta (Pre-winter) (Drik)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-22.405434791408855,"eotMinutes":-6.292074307419696,"ayanamsa":23.4761}},"calendars":{"vikram_samvat":2030,"vikram_samvatsara":"Akṣaya","saka_samvat":1895,"saka_samvatsara":"Pramādī","bengali_samvat":1380,"malayalam_era":1149,"nanakshahi_year":504,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Śukla Pakṣa","solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Śukla Tṛtīyā · Vikram 2030 Akṣaya · Śaka 1895 Pramādī"},"festivals":[{"id":"lohri","name":"Lohri","name_sanskrit":"लोहड़ी","tradition":"Regional","significance":"Punjab harvest festival; eve of Makara Saṅkrānti. (Approximated as 13/14 January annually; correct via Sun in Dhanu/Makara cusp.)","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":4},{"id":"dhanu-sankranti","name":"Dhanu Saṅkrānti","name_sanskrit":"धनु सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Sagittarius; Dhanu-māsa (Khara-māsa).","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":5}],"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":[]},"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 January 7, 1973 CE · Perth, Australia · Vidhyamitra","description":"January 7, 1973 CE for Perth, Australia: Śukla Tṛtīyā, sūryodaya 05:19, sūryāsta 19:27.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1973-01-07","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1973-01-07","sa":"https://sa.vidhyamitra.com/city/perth/1973-01-07","hi":"https://hi.vidhyamitra.com/city/perth/1973-01-07","x-default":"https://vidhyamitra.com/city/perth/1973-01-07"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-19T15:04:04.286Z","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":"2026-05-19T15:04:04.286Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-19T15:04:04.286Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}