{"id":"vidhyamitra:city-day:perth:2121-10-11:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2121-10-11","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2121-10-11","date_display":"October 11, 2121 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":2121,"month":10,"day":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2496022.770833,"kali_year":5223,"ahargana":1907557.2708,"sun":{"sidereal_longitude":171.1461,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":164.9361,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":30,"name":"Amāvasyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Amāvasyā","elongation_degrees":353.79,"elapsed_within_tithi_degrees":5.79},"nakshatra":{"number":13,"name":"Hasta","pada":2,"moon_longitude":164.9361,"elapsed_within_degrees":4.9361},"yoga":{"number":26,"name":"Indra","sum_longitude":336.0822},"karana":{"half_tithi_index":58,"name":"Catuṣpāda"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"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":2121,"month":10,"day":11,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2496022.770833,"ahargana":1907557.2708,"kali_year":5223,"ayanamsa_lahiri":25.5541,"grahas":{"sun":{"sidereal_longitude":172.183632,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"moon":{"sidereal_longitude":165.61893199999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false,"latitude":-4.3754},"mars":{"sidereal_longitude":204.87453200000004,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":155.00523199999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":117.855032,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":156.018732,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":81.18503199999998,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":268.436,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":88.436,"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":2121,"month":10,"day":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2496022.770833,"kali_year":5223,"ahargana":1907557.2708,"sun":{"sidereal_longitude":171.1461,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":164.9361,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":30,"name":"Amāvasyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Amāvasyā","elongation_degrees":353.79,"elapsed_within_tithi_degrees":5.79},"nakshatra":{"number":13,"name":"Hasta","pada":2,"moon_longitude":164.9361,"elapsed_within_degrees":4.9361},"yoga":{"number":26,"name":"Indra","sum_longitude":336.0822},"karana":{"half_tithi_index":58,"name":"Catuṣpāda"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.375,"elongation":6.21},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.375,"opposition_distance":173.79}},"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":"05:41","sunsetLocal":"18:24","solarNoonLocal":"12:03","dayLengthHours":12.714518463611114,"dayLengthDisplay":"12 Hours 42 Mins 52 Secs","nightLengthDisplay":"11 Hours 17 Mins 08 Secs","moonriseLocal":"05:22","moonsetLocal":"17:50","rahuKala":{"name":"Rāhu Kāla","start":"08:52","end":"10:27","startHours":8.864230817493386,"endHours":10.453545625444775,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:38","end":"15:13","startHours":13.632175241347554,"endHours":15.221490049298943,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"05:41","end":"07:16","startHours":5.685601201590608,"endHours":7.274916009541998,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:39","end":"09:05","startHours":8.652322176433202,"endHours":9.076139458553572,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:13","end":"06:33","startHours":6.215372804241071,"endHours":6.5544266299373675,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:37","end":"12:28","startHours":11.619043151275793,"endHours":12.466677715516536,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:59","end":"04:50","startHours":3.9903320731091263,"endHours":4.837966637349868,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:38","end":"05:41","startHours":4.626057996289682,"endHours":5.685601201590608,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:10","end":"15:01","startHours":14.161946843998017,"endHours":15.009581408238757,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:12","end":"18:36","startHours":18.200119665201722,"endHours":18.60011966520172,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:24","end":"18:56","startHours":18.40011966520172,"endHours":18.929891267852184,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:09","end":"19:54","startHours":18.15011966520172,"endHours":19.90011966520172,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:37","end":"00:28","startHours":23.619043151275793,"endHours":24.466677715516536,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"05:41","end":"07:16","startHours":5.685601201590608,"endHours":7.274916009541998,"quality":"inauspicious"},{"name":"Śubha","start":"07:16","end":"08:52","startHours":7.274916009541998,"endHours":8.864230817493386,"quality":"auspicious"},{"name":"Roga","start":"08:52","end":"10:27","startHours":8.864230817493386,"endHours":10.453545625444775,"quality":"inauspicious"},{"name":"Udveg","start":"10:27","end":"12:03","startHours":10.453545625444775,"endHours":12.042860433396164,"quality":"inauspicious"},{"name":"Chala","start":"12:03","end":"13:38","startHours":12.042860433396164,"endHours":13.632175241347554,"quality":"neutral"},{"name":"Labha","start":"13:38","end":"15:13","startHours":13.632175241347554,"endHours":15.221490049298943,"quality":"auspicious"},{"name":"Amṛta","start":"15:13","end":"16:49","startHours":15.221490049298943,"endHours":16.810804857250332,"quality":"auspicious"},{"name":"Kāla","start":"16:49","end":"18:24","startHours":16.810804857250332,"endHours":18.40011966520172,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:24","end":"19:49","startHours":18.40011966520172,"endHours":19.810804857250332,"quality":"auspicious"},{"name":"Amṛta","start":"19:49","end":"21:13","startHours":19.810804857250332,"endHours":21.221490049298943,"quality":"auspicious"},{"name":"Kāla","start":"21:13","end":"22:38","startHours":21.221490049298943,"endHours":22.632175241347554,"quality":"inauspicious"},{"name":"Śubha","start":"22:38","end":"00:03","startHours":22.632175241347554,"endHours":24.042860433396164,"quality":"auspicious"},{"name":"Roga","start":"00:03","end":"01:27","startHours":24.042860433396164,"endHours":25.453545625444775,"quality":"inauspicious"},{"name":"Udveg","start":"01:27","end":"02:52","startHours":25.453545625444775,"endHours":26.864230817493386,"quality":"inauspicious"},{"name":"Chala","start":"02:52","end":"04:16","startHours":26.864230817493386,"endHours":28.274916009541997,"quality":"neutral"},{"name":"Labha","start":"04:16","end":"05:41","startHours":28.274916009541997,"endHours":29.685601201590607,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:41","end":"06:41","startHours":5.685601201590608,"endHours":6.685601201590608,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"06:41","end":"07:41","startHours":6.685601201590608,"endHours":7.685601201590608,"planetary_lord":"Moon"},{"name":"Hora 3","start":"07:41","end":"08:41","startHours":7.685601201590608,"endHours":8.685601201590607,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"08:41","end":"09:41","startHours":8.685601201590607,"endHours":9.685601201590607,"planetary_lord":"Venus"},{"name":"Hora 5","start":"09:41","end":"10:41","startHours":9.685601201590607,"endHours":10.685601201590607,"planetary_lord":"Sun"},{"name":"Hora 6","start":"10:41","end":"11:41","startHours":10.685601201590607,"endHours":11.685601201590607,"planetary_lord":"Mars"},{"name":"Hora 7","start":"11:41","end":"12:41","startHours":11.685601201590607,"endHours":12.685601201590607,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"12:41","end":"13:41","startHours":12.685601201590607,"endHours":13.685601201590607,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"13:41","end":"14:41","startHours":13.685601201590607,"endHours":14.685601201590607,"planetary_lord":"Moon"},{"name":"Hora 10","start":"14:41","end":"15:41","startHours":14.685601201590607,"endHours":15.685601201590607,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"15:41","end":"16:41","startHours":15.685601201590607,"endHours":16.685601201590607,"planetary_lord":"Venus"},{"name":"Hora 12","start":"16:41","end":"17:41","startHours":16.685601201590607,"endHours":17.685601201590607,"planetary_lord":"Sun"},{"name":"Hora 13","start":"17:41","end":"18:41","startHours":17.685601201590607,"endHours":18.685601201590607,"planetary_lord":"Mars"},{"name":"Hora 14","start":"18:41","end":"19:41","startHours":18.685601201590607,"endHours":19.685601201590607,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"19:41","end":"20:41","startHours":19.685601201590607,"endHours":20.685601201590607,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"20:41","end":"21:41","startHours":20.685601201590607,"endHours":21.685601201590607,"planetary_lord":"Moon"},{"name":"Hora 17","start":"21:41","end":"22:41","startHours":21.685601201590607,"endHours":22.685601201590607,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"22:41","end":"23:41","startHours":22.685601201590607,"endHours":23.685601201590607,"planetary_lord":"Venus"},{"name":"Hora 19","start":"23:41","end":"00:41","startHours":23.685601201590607,"endHours":24.685601201590607,"planetary_lord":"Sun"},{"name":"Hora 20","start":"00:41","end":"01:41","startHours":24.685601201590607,"endHours":25.685601201590607,"planetary_lord":"Mars"},{"name":"Hora 21","start":"01:41","end":"02:41","startHours":25.685601201590607,"endHours":26.685601201590607,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"02:41","end":"03:41","startHours":26.685601201590607,"endHours":27.685601201590607,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"03:41","end":"04:41","startHours":27.685601201590607,"endHours":28.685601201590607,"planetary_lord":"Moon"},{"name":"Hora 24","start":"04:41","end":"05:41","startHours":28.685601201590607,"endHours":29.685601201590607,"planetary_lord":"Mercury"}],"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","Kanyā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Tulā","Dhanu","Makara"]},"dishaShool":"East (Pūrva)","chandraVasa":"North-West","rahuVasa":"East","anandadiYoga":{"name":"Vajra","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":-6.959822918645714,"eotMinutes":13.986373996230075,"ayanamsa":25.5541}},"calendars":{"vikram_samvat":2178,"vikram_samvatsara":"Jaya","saka_samvat":2043,"saka_samvatsara":"Vṛṣa","bengali_samvat":1528,"malayalam_era":1297,"nanakshahi_year":652,"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 Amāvasyā · Vikram 2178 Jaya · Śaka 2043 Vṛṣa"},"festivals":[{"id":"mahalaya-amavasya","name":"Mahālaya Amāvasyā (Sarvapitṛ Amāvasyā)","name_sanskrit":"महालय अमावस्या","tradition":"Pan-Hindu","associated_deity":"Pitṛ-deva","significance":"Final day of Pitṛ-Pakṣa; tarpaṇa for all ancestors.","vrata":true,"detection":{"tithi_number":30,"tithi_paksha":"Kṛṣṇa","lunar_month":"Āśvina"},"precedence":1}],"todays_walk":{"walk":{"id":"shani-walk","name":"Śani Walk","name_sanskrit":"शनि यात्रा","type":"graha","description":"Tapas + endurance + BG 17.14-19.","step_count":7,"url":"/walk/shani-walk"},"reason":"Śanivāra (Saturday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3137-10-20","event":"Karṇa-Vadha (Mahābhārata Day 17)","chart_id":"karna","shared_marker":"same Kṛṣṇa Amāvasyā","url":"/day/-3137-10-20","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 October 11, 2121 CE · Perth, Australia · Vidhyamitra","description":"October 11, 2121 CE for Perth, Australia: Kṛṣṇa Amāvasyā, sūryodaya 05:41, sūryāsta 18:24.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2121-10-11","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2121-10-11","sa":"https://sa.vidhyamitra.com/city/perth/2121-10-11","hi":"https://hi.vidhyamitra.com/city/perth/2121-10-11","x-default":"https://vidhyamitra.com/city/perth/2121-10-11"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T22:29:58.010Z","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":"2026-06-01T22:29:58.010Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T22:29:58.010Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}