{"id":"vidhyamitra:city-day:perth:1971-10-10:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1971-10-10","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1971-10-10","date_display":"October 10, 1971 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":1971,"month":10,"day":10,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441234.770833,"kali_year":5073,"ahargana":1852769.2708,"sun":{"sidereal_longitude":171.9505,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":64.3582,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":22,"name":"Saptamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Saptamī","elongation_degrees":252.4077,"elapsed_within_tithi_degrees":0.4077},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":4,"moon_longitude":64.3582,"elapsed_within_degrees":11.0248},"yoga":{"number":18,"name":"Varīyān","sum_longitude":236.3087},"karana":{"half_tithi_index":42,"name":"Viṣṭi"},"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":1971,"month":10,"day":10,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2441234.770833,"ahargana":1852769.2708,"kali_year":5073,"ayanamsa_lahiri":23.4587,"grahas":{"sun":{"sidereal_longitude":172.623337,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"moon":{"sidereal_longitude":68.10083700000001,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":1},"retrograde":false,"latitude":3.29},"mars":{"sidereal_longitude":294.591137,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":173.99433699999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":221.80513700000006,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":3},"retrograde":false},"venus":{"sidereal_longitude":184.59573699999999,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":43.054237,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":291.3679,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":111.3679,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"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":1971,"month":10,"day":10,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441234.770833,"kali_year":5073,"ahargana":1852769.2708,"sun":{"sidereal_longitude":171.9505,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":64.3582,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":22,"name":"Saptamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Saptamī","elongation_degrees":252.4077,"elapsed_within_tithi_degrees":0.4077},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":4,"moon_longitude":64.3582,"elapsed_within_degrees":11.0248},"yoga":{"number":18,"name":"Varīyān","sum_longitude":236.3087},"karana":{"half_tithi_index":42,"name":"Viṣṭi"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.29,"elongation":107.592},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.29,"opposition_distance":72.408}},"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":"05:43","sunsetLocal":"18:23","solarNoonLocal":"12:03","dayLengthHours":12.660669584887607,"dayLengthDisplay":"12 Hours 39 Mins 38 Secs","nightLengthDisplay":"11 Hours 20 Mins 22 Secs","moonriseLocal":"00:04","moonsetLocal":"10:05","rahuKala":{"name":"Rāhu Kāla","start":"16:48","end":"18:23","startHours":16.79466032646669,"endHours":18.377244024577642,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:03","end":"13:38","startHours":12.046909232133839,"endHours":13.62949293024479,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:13","end":"16:48","startHours":15.21207662835574,"endHours":16.79466032646669,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:40","end":"09:06","startHours":8.67073067616381,"endHours":9.092752995660064,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:15","end":"06:35","startHours":6.244102339060352,"endHours":6.581720194657355,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:37","end":"12:28","startHours":11.624886912637585,"endHours":12.468931551630092,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:02","end":"04:52","startHours":4.028485161705021,"endHours":4.872529800697528,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:40","end":"05:43","startHours":4.661518640949401,"endHours":5.716574439690035,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:09","end":"15:00","startHours":14.157020829615107,"endHours":15.001065468607614,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:11","end":"18:35","startHours":18.177244024577643,"endHours":18.57724402457764,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:23","end":"18:54","startHours":18.377244024577642,"endHours":18.90477192394796,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:08","end":"19:53","startHours":18.127244024577642,"endHours":19.877244024577642,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:37","end":"00:28","startHours":23.624886912637585,"endHours":24.468931551630092,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:43","end":"07:18","startHours":5.716574439690035,"endHours":7.299158137800986,"quality":"inauspicious"},{"name":"Chala","start":"07:18","end":"08:53","startHours":7.299158137800986,"endHours":8.881741835911937,"quality":"neutral"},{"name":"Labha","start":"08:53","end":"10:28","startHours":8.881741835911937,"endHours":10.464325534022887,"quality":"auspicious"},{"name":"Amṛta","start":"10:28","end":"12:03","startHours":10.464325534022887,"endHours":12.046909232133839,"quality":"auspicious"},{"name":"Kāla","start":"12:03","end":"13:38","startHours":12.046909232133839,"endHours":13.62949293024479,"quality":"inauspicious"},{"name":"Śubha","start":"13:38","end":"15:13","startHours":13.62949293024479,"endHours":15.21207662835574,"quality":"auspicious"},{"name":"Roga","start":"15:13","end":"16:48","startHours":15.21207662835574,"endHours":16.79466032646669,"quality":"inauspicious"},{"name":"Udveg","start":"16:48","end":"18:23","startHours":16.79466032646669,"endHours":18.377244024577642,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:23","end":"19:48","startHours":18.377244024577642,"endHours":19.79466032646669,"quality":"auspicious"},{"name":"Roga","start":"19:48","end":"21:13","startHours":19.79466032646669,"endHours":21.21207662835574,"quality":"inauspicious"},{"name":"Udveg","start":"21:13","end":"22:38","startHours":21.21207662835574,"endHours":22.62949293024479,"quality":"inauspicious"},{"name":"Chala","start":"22:38","end":"00:03","startHours":22.62949293024479,"endHours":24.04690923213384,"quality":"neutral"},{"name":"Labha","start":"00:03","end":"01:28","startHours":24.04690923213384,"endHours":25.464325534022887,"quality":"auspicious"},{"name":"Amṛta","start":"01:28","end":"02:53","startHours":25.464325534022887,"endHours":26.88174183591194,"quality":"auspicious"},{"name":"Kāla","start":"02:53","end":"04:18","startHours":26.88174183591194,"endHours":28.299158137800987,"quality":"inauspicious"},{"name":"Śubha","start":"04:18","end":"05:43","startHours":28.299158137800987,"endHours":29.716574439690035,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:43","end":"06:43","startHours":5.716574439690035,"endHours":6.716574439690035,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:43","end":"07:43","startHours":6.716574439690035,"endHours":7.716574439690035,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:43","end":"08:43","startHours":7.716574439690035,"endHours":8.716574439690035,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:43","end":"09:43","startHours":8.716574439690035,"endHours":9.716574439690035,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:43","end":"10:43","startHours":9.716574439690035,"endHours":10.716574439690035,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:43","end":"11:43","startHours":10.716574439690035,"endHours":11.716574439690035,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:43","end":"12:43","startHours":11.716574439690035,"endHours":12.716574439690035,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:43","end":"13:43","startHours":12.716574439690035,"endHours":13.716574439690035,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:43","end":"14:43","startHours":13.716574439690035,"endHours":14.716574439690035,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:43","end":"15:43","startHours":14.716574439690035,"endHours":15.716574439690035,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:43","end":"16:43","startHours":15.716574439690035,"endHours":16.716574439690035,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:43","end":"17:43","startHours":16.716574439690035,"endHours":17.716574439690035,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:43","end":"18:43","startHours":17.716574439690035,"endHours":18.716574439690035,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:43","end":"19:43","startHours":18.716574439690035,"endHours":19.716574439690035,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:43","end":"20:43","startHours":19.716574439690035,"endHours":20.716574439690035,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:43","end":"21:43","startHours":20.716574439690035,"endHours":21.716574439690035,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:43","end":"22:43","startHours":21.716574439690035,"endHours":22.716574439690035,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:43","end":"23:43","startHours":22.716574439690035,"endHours":23.716574439690035,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:43","end":"00:43","startHours":23.716574439690035,"endHours":24.716574439690035,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:43","end":"01:43","startHours":24.716574439690035,"endHours":25.716574439690035,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:43","end":"02:43","startHours":25.716574439690035,"endHours":26.716574439690035,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:43","end":"03:43","startHours":26.716574439690035,"endHours":27.716574439690035,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:43","end":"04:43","startHours":27.716574439690035,"endHours":28.716574439690035,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:43","end":"05:43","startHours":28.716574439690035,"endHours":29.716574439690035,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Maghā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Mithuna","Siṃha","Vṛścika","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Karka","Kanyā","Tulā","Makara","Kumbha"]},"dishaShool":"West (Paścim)","chandraVasa":"South","rahuVasa":"North-East","anandadiYoga":{"name":"Saumya","quality":"Auspicious"},"tropicalRitu":"Śarad (Autumn) (tropical)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-6.3255322158845155,"eotMinutes":13.743446071969673,"ayanamsa":23.4587}},"calendars":{"vikram_samvat":2028,"vikram_samvatsara":"Raktākṣī","saka_samvat":1893,"saka_samvatsara":"Virodhakṛt","bengali_samvat":1378,"malayalam_era":1147,"nanakshahi_year":502,"lunar_month":"Kārtika","lunar_month_paksha_full":"Kārtika Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Kārtika","lunar_month_amanta":"Āśvina","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":"Kārtika Kṛṣṇa Saptamī · Vikram 2028 Raktākṣī · Śaka 1893 Virodhakṛt"},"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":[]},"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 October 10, 1971 CE · Perth, Australia · Vidhyamitra","description":"October 10, 1971 CE for Perth, Australia: Kṛṣṇa Saptamī, sūryodaya 05:43, sūryāsta 18:23.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1971-10-10","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1971-10-10","sa":"https://sa.vidhyamitra.com/city/perth/1971-10-10","hi":"https://hi.vidhyamitra.com/city/perth/1971-10-10","x-default":"https://vidhyamitra.com/city/perth/1971-10-10"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T17:05:31.996Z","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":"2026-06-02T17:05:31.996Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T17:05:31.996Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}