{"id":"vidhyamitra:city-day:perth:2137-02-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2137-02-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2137-02-18","date_display":"February 18, 2137 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":2137,"month":2,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2501631.770833,"kali_year":5238,"ahargana":1913166.2708,"sun":{"sidereal_longitude":303.4736,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":276.0604,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":332.5868,"elapsed_within_tithi_degrees":8.5868},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3,"moon_longitude":276.0604,"elapsed_within_degrees":9.3937},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":219.5339},"karana":{"half_tithi_index":55,"name":"Vaṇija"},"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":2137,"month":2,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2501631.770833,"ahargana":1913166.2708,"kali_year":5238,"ayanamsa_lahiri":25.7686,"grahas":{"sun":{"sidereal_longitude":303.68802700000003,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":274.476127,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false,"latitude":-3.6932},"mars":{"sidereal_longitude":297.06572700000004,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":310.49232699999993,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":217.35602700000004,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":302.22012700000005,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":true},"saturn":{"sidereal_longitude":263.344827,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":331.2442,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":151.2442,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","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":2137,"month":2,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2501631.770833,"kali_year":5238,"ahargana":1913166.2708,"sun":{"sidereal_longitude":303.4736,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":276.0604,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":332.5868,"elapsed_within_tithi_degrees":8.5868},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3,"moon_longitude":276.0604,"elapsed_within_degrees":9.3937},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":219.5339},"karana":{"half_tithi_index":55,"name":"Vaṇija"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.693,"elongation":27.413},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.693,"opposition_distance":152.587}},"eclipse_window_40days":[{"offset_days":18,"type":"lunar","occurs":true,"moon_latitude":0.509,"opposition_distance":2.147}]},"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":"19:05","solarNoonLocal":"12:31","dayLengthHours":13.12097932492158,"dayLengthDisplay":"13 Hours 07 Mins 16 Secs","nightLengthDisplay":"10 Hours 52 Mins 44 Secs","moonriseLocal":"03:38","moonsetLocal":"17:30","rahuKala":{"name":"Rāhu Kāla","start":"07:36","end":"09:14","startHours":7.596180690027744,"endHours":9.236303105642941,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:53","end":"12:31","startHours":10.876425521258138,"endHours":12.516547936873337,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:09","end":"15:48","startHours":14.156670352488534,"endHours":15.796792768103732,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:01","end":"09:27","startHours":9.017620116894248,"endHours":9.454986094391634,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:30","end":"06:51","startHours":6.502765746284279,"endHours":6.852658528282188,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:05","end":"12:57","startHours":12.079181959375951,"endHours":12.953913914370723,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:12","end":"05:05","startHours":4.206594364423003,"endHours":5.081326319417775,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:52","end":"05:57","startHours":4.862643330669082,"endHours":5.9560582744125465,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:42","end":"15:35","startHours":14.703377824360267,"endHours":15.578109779355039,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:53","end":"19:17","startHours":18.877037599334127,"endHours":19.277037599334125,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:05","end":"19:37","startHours":19.077037599334126,"endHours":19.62374507120586,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:50","end":"20:35","startHours":18.827037599334126,"endHours":20.577037599334126,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:05","end":"00:57","startHours":24.07918195937595,"endHours":24.953913914370723,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"05:57","end":"07:36","startHours":5.9560582744125465,"endHours":7.596180690027744,"quality":"auspicious"},{"name":"Kāla","start":"07:36","end":"09:14","startHours":7.596180690027744,"endHours":9.236303105642941,"quality":"inauspicious"},{"name":"Śubha","start":"09:14","end":"10:53","startHours":9.236303105642941,"endHours":10.876425521258138,"quality":"auspicious"},{"name":"Roga","start":"10:53","end":"12:31","startHours":10.876425521258138,"endHours":12.516547936873337,"quality":"inauspicious"},{"name":"Udveg","start":"12:31","end":"14:09","startHours":12.516547936873337,"endHours":14.156670352488534,"quality":"inauspicious"},{"name":"Chala","start":"14:09","end":"15:48","startHours":14.156670352488534,"endHours":15.796792768103732,"quality":"neutral"},{"name":"Labha","start":"15:48","end":"17:26","startHours":15.796792768103732,"endHours":17.43691518371893,"quality":"auspicious"},{"name":"Amṛta","start":"17:26","end":"19:05","startHours":17.43691518371893,"endHours":19.077037599334126,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"19:05","end":"20:26","startHours":19.077037599334126,"endHours":20.436915183718927,"quality":"neutral"},{"name":"Labha","start":"20:26","end":"21:48","startHours":20.436915183718927,"endHours":21.79679276810373,"quality":"auspicious"},{"name":"Amṛta","start":"21:48","end":"23:09","startHours":21.79679276810373,"endHours":23.156670352488533,"quality":"auspicious"},{"name":"Kāla","start":"23:09","end":"00:31","startHours":23.156670352488533,"endHours":24.516547936873337,"quality":"inauspicious"},{"name":"Śubha","start":"00:31","end":"01:53","startHours":24.516547936873337,"endHours":25.876425521258138,"quality":"auspicious"},{"name":"Roga","start":"01:53","end":"03:14","startHours":25.876425521258138,"endHours":27.23630310564294,"quality":"inauspicious"},{"name":"Udveg","start":"03:14","end":"04:36","startHours":27.23630310564294,"endHours":28.596180690027744,"quality":"inauspicious"},{"name":"Chala","start":"04:36","end":"05:57","startHours":28.596180690027744,"endHours":29.95605827441255,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"05:57","end":"06:57","startHours":5.9560582744125465,"endHours":6.9560582744125465,"planetary_lord":"Moon"},{"name":"Hora 2","start":"06:57","end":"07:57","startHours":6.9560582744125465,"endHours":7.9560582744125465,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"07:57","end":"08:57","startHours":7.9560582744125465,"endHours":8.956058274412547,"planetary_lord":"Venus"},{"name":"Hora 4","start":"08:57","end":"09:57","startHours":8.956058274412547,"endHours":9.956058274412547,"planetary_lord":"Sun"},{"name":"Hora 5","start":"09:57","end":"10:57","startHours":9.956058274412547,"endHours":10.956058274412547,"planetary_lord":"Mars"},{"name":"Hora 6","start":"10:57","end":"11:57","startHours":10.956058274412547,"endHours":11.956058274412547,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"11:57","end":"12:57","startHours":11.956058274412547,"endHours":12.956058274412547,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"12:57","end":"13:57","startHours":12.956058274412547,"endHours":13.956058274412547,"planetary_lord":"Moon"},{"name":"Hora 9","start":"13:57","end":"14:57","startHours":13.956058274412547,"endHours":14.956058274412547,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"14:57","end":"15:57","startHours":14.956058274412547,"endHours":15.956058274412547,"planetary_lord":"Venus"},{"name":"Hora 11","start":"15:57","end":"16:57","startHours":15.956058274412547,"endHours":16.95605827441255,"planetary_lord":"Sun"},{"name":"Hora 12","start":"16:57","end":"17:57","startHours":16.95605827441255,"endHours":17.95605827441255,"planetary_lord":"Mars"},{"name":"Hora 13","start":"17:57","end":"18:57","startHours":17.95605827441255,"endHours":18.95605827441255,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"18:57","end":"19:57","startHours":18.95605827441255,"endHours":19.95605827441255,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"19:57","end":"20:57","startHours":19.95605827441255,"endHours":20.95605827441255,"planetary_lord":"Moon"},{"name":"Hora 16","start":"20:57","end":"21:57","startHours":20.95605827441255,"endHours":21.95605827441255,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"21:57","end":"22:57","startHours":21.95605827441255,"endHours":22.95605827441255,"planetary_lord":"Venus"},{"name":"Hora 18","start":"22:57","end":"23:57","startHours":22.95605827441255,"endHours":23.95605827441255,"planetary_lord":"Sun"},{"name":"Hora 19","start":"23:57","end":"00:57","startHours":23.95605827441255,"endHours":24.95605827441255,"planetary_lord":"Mars"},{"name":"Hora 20","start":"00:57","end":"01:57","startHours":24.95605827441255,"endHours":25.95605827441255,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"01:57","end":"02:57","startHours":25.95605827441255,"endHours":26.95605827441255,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"02:57","end":"03:57","startHours":26.95605827441255,"endHours":27.95605827441255,"planetary_lord":"Moon"},{"name":"Hora 23","start":"03:57","end":"04:57","startHours":27.95605827441255,"endHours":28.95605827441255,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"04:57","end":"05:57","startHours":28.95605827441255,"endHours":29.95605827441255,"planetary_lord":"Venus"}],"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":["Mithuna","Karka","Tulā","Vṛścika","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Dhanu","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"South-East","rahuVasa":"North-East","anandadiYoga":{"name":"Rākṣasa","quality":"Inauspicious"},"tropicalRitu":"Śiśira (Winter)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-11.661183386374946,"eotMinutes":-14.434876212400278,"ayanamsa":25.7686}},"calendars":{"vikram_samvat":2194,"vikram_samvatsara":"Sādhāraṇa","saka_samvat":2059,"saka_samvatsara":"Hemalambī","bengali_samvat":1544,"malayalam_era":1313,"nanakshahi_year":668,"lunar_month":"Phālguna","lunar_month_paksha_full":"Phālguna Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Phālguna","lunar_month_amanta":"Māgha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Kumbha (Māsi)","ritu":"Śiśira (Winter)","display_summary":"Phālguna Kṛṣṇa Trayodaśī · Vikram 2194 Sādhāraṇa · Śaka 2059 Hemalambī"},"festivals":[{"id":"pradosha-vrata","name":"Pradoṣa Vrata","name_sanskrit":"प्रदोष व्रत","tradition":"Shaiva","associated_deity":"Śiva","significance":"Twilight worship of Śiva on Trayodaśī.","vrata":true,"detection":{"any_of":[{"tithi_number":13},{"tithi_number":28}]},"precedence":7}],"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 February 18, 2137 CE · Perth, Australia · Vidhyamitra","description":"February 18, 2137 CE for Perth, Australia: Kṛṣṇa Trayodaśī, sūryodaya 05:57, sūryāsta 19:05.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2137-02-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2137-02-18","sa":"https://sa.vidhyamitra.com/city/perth/2137-02-18","hi":"https://hi.vidhyamitra.com/city/perth/2137-02-18","x-default":"https://vidhyamitra.com/city/perth/2137-02-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T19:28:18.718Z","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":"2026-05-31T19:28:18.718Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T19:28:18.718Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}