{"id":"vidhyamitra:city-day:perth:2013-02-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/2013-02-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2013-02-18","date_display":"February 18, 2013 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":"Not independently benchmarked across the declared range","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":2013,"month":2,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2456341.770833,"kali_year":5114,"ahargana":1867876.2708,"sun":{"sidereal_longitude":305.5884,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":36.9893,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":91.4009,"elapsed_within_tithi_degrees":7.4009},"nakshatra":{"number":3,"name":"Kṛttikā","pada":4,"moon_longitude":36.9893,"elapsed_within_degrees":10.3227},"yoga":{"number":26,"name":"Indra","sum_longitude":342.5778},"karana":{"half_tithi_index":15,"name":"Bava"},"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":2013,"month":2,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2456341.770833,"ahargana":1867876.2708,"kali_year":5114,"ayanamsa_lahiri":24.0365,"grahas":{"sun":{"sidereal_longitude":305.505938,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":37.48013800000001,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":4},"retrograde":false,"latitude":-0.4748},"mars":{"sidereal_longitude":318.407638,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":323.3426380000001,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":42.446537999999975,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":1},"retrograde":false},"venus":{"sidereal_longitude":295.73903799999994,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":197.23033799999996,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":210.9263,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":30.9263,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","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":"Not independently benchmarked across the declared range","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":2013,"month":2,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2456341.770833,"kali_year":5114,"ahargana":1867876.2708,"sun":{"sidereal_longitude":305.5884,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":36.9893,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":91.4009,"elapsed_within_tithi_degrees":7.4009},"nakshatra":{"number":3,"name":"Kṛttikā","pada":4,"moon_longitude":36.9893,"elapsed_within_degrees":10.3227},"yoga":{"number":26,"name":"Indra","sum_longitude":342.5778},"karana":{"half_tithi_index":15,"name":"Bava"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-0.475,"elongation":91.401},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-0.475,"opposition_distance":88.599}},"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":"05:57","sunsetLocal":"19:05","solarNoonLocal":"12:31","dayLengthHours":13.118333685587558,"dayLengthDisplay":"13 Hours 07 Mins 06 Secs","nightLengthDisplay":"10 Hours 52 Mins 54 Secs","moonriseLocal":"13:30","moonsetLocal":"23:48","rahuKala":{"name":"Rāhu Kāla","start":"07:36","end":"09:14","startHours":7.597172804778002,"endHours":9.236964515476448,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:53","end":"12:31","startHours":10.87675622617489,"endHours":12.516547936873337,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:09","end":"15:48","startHours":14.15633964757178,"endHours":15.796131358270227,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:01","end":"09:27","startHours":9.018325620716654,"endHours":9.45560341023624,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:30","end":"06:51","startHours":6.503978330979039,"endHours":6.853800562594707,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:05","end":"12:57","startHours":12.079270147353752,"endHours":12.953825726392923,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:12","end":"05:05","startHours":4.208269936001216,"endHours":5.082825515040387,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:52","end":"05:57","startHours":4.864186620280594,"endHours":5.957381094079557,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:42","end":"15:35","startHours":14.702936884471264,"endHours":15.577492463510435,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:53","end":"19:17","startHours":18.875714779667117,"endHours":19.275714779667116,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:05","end":"19:37","startHours":19.075714779667116,"endHours":19.622312016566596,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:50","end":"20:35","startHours":18.825714779667116,"endHours":20.575714779667116,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:05","end":"00:57","startHours":24.079270147353753,"endHours":24.95382572639292,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"05:57","end":"07:36","startHours":5.957381094079557,"endHours":7.597172804778002,"quality":"auspicious"},{"name":"Kāla","start":"07:36","end":"09:14","startHours":7.597172804778002,"endHours":9.236964515476448,"quality":"inauspicious"},{"name":"Śubha","start":"09:14","end":"10:53","startHours":9.236964515476448,"endHours":10.87675622617489,"quality":"auspicious"},{"name":"Roga","start":"10:53","end":"12:31","startHours":10.87675622617489,"endHours":12.516547936873337,"quality":"inauspicious"},{"name":"Udveg","start":"12:31","end":"14:09","startHours":12.516547936873337,"endHours":14.15633964757178,"quality":"inauspicious"},{"name":"Chala","start":"14:09","end":"15:48","startHours":14.15633964757178,"endHours":15.796131358270227,"quality":"neutral"},{"name":"Labha","start":"15:48","end":"17:26","startHours":15.796131358270227,"endHours":17.43592306896867,"quality":"auspicious"},{"name":"Amṛta","start":"17:26","end":"19:05","startHours":17.43592306896867,"endHours":19.075714779667116,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"19:05","end":"20:26","startHours":19.075714779667116,"endHours":20.43592306896867,"quality":"neutral"},{"name":"Labha","start":"20:26","end":"21:48","startHours":20.43592306896867,"endHours":21.796131358270227,"quality":"auspicious"},{"name":"Amṛta","start":"21:48","end":"23:09","startHours":21.796131358270227,"endHours":23.156339647571784,"quality":"auspicious"},{"name":"Kāla","start":"23:09","end":"00:31","startHours":23.156339647571784,"endHours":24.516547936873337,"quality":"inauspicious"},{"name":"Śubha","start":"00:31","end":"01:53","startHours":24.516547936873337,"endHours":25.87675622617489,"quality":"auspicious"},{"name":"Roga","start":"01:53","end":"03:14","startHours":25.87675622617489,"endHours":27.236964515476448,"quality":"inauspicious"},{"name":"Udveg","start":"03:14","end":"04:36","startHours":27.236964515476448,"endHours":28.597172804778005,"quality":"inauspicious"},{"name":"Chala","start":"04:36","end":"05:57","startHours":28.597172804778005,"endHours":29.957381094079558,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"05:57","end":"06:57","startHours":5.957381094079557,"endHours":6.957381094079557,"planetary_lord":"Moon"},{"name":"Hora 2","start":"06:57","end":"07:57","startHours":6.957381094079557,"endHours":7.957381094079557,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"07:57","end":"08:57","startHours":7.957381094079557,"endHours":8.957381094079558,"planetary_lord":"Venus"},{"name":"Hora 4","start":"08:57","end":"09:57","startHours":8.957381094079558,"endHours":9.957381094079558,"planetary_lord":"Sun"},{"name":"Hora 5","start":"09:57","end":"10:57","startHours":9.957381094079558,"endHours":10.957381094079558,"planetary_lord":"Mars"},{"name":"Hora 6","start":"10:57","end":"11:57","startHours":10.957381094079558,"endHours":11.957381094079558,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"11:57","end":"12:57","startHours":11.957381094079558,"endHours":12.957381094079558,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"12:57","end":"13:57","startHours":12.957381094079558,"endHours":13.957381094079558,"planetary_lord":"Moon"},{"name":"Hora 9","start":"13:57","end":"14:57","startHours":13.957381094079558,"endHours":14.957381094079558,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"14:57","end":"15:57","startHours":14.957381094079558,"endHours":15.957381094079558,"planetary_lord":"Venus"},{"name":"Hora 11","start":"15:57","end":"16:57","startHours":15.957381094079558,"endHours":16.957381094079558,"planetary_lord":"Sun"},{"name":"Hora 12","start":"16:57","end":"17:57","startHours":16.957381094079558,"endHours":17.957381094079558,"planetary_lord":"Mars"},{"name":"Hora 13","start":"17:57","end":"18:57","startHours":17.957381094079558,"endHours":18.957381094079558,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"18:57","end":"19:57","startHours":18.957381094079558,"endHours":19.957381094079558,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"19:57","end":"20:57","startHours":19.957381094079558,"endHours":20.957381094079558,"planetary_lord":"Moon"},{"name":"Hora 16","start":"20:57","end":"21:57","startHours":20.957381094079558,"endHours":21.957381094079558,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"21:57","end":"22:57","startHours":21.957381094079558,"endHours":22.957381094079558,"planetary_lord":"Venus"},{"name":"Hora 18","start":"22:57","end":"23:57","startHours":22.957381094079558,"endHours":23.957381094079558,"planetary_lord":"Sun"},{"name":"Hora 19","start":"23:57","end":"00:57","startHours":23.957381094079558,"endHours":24.957381094079558,"planetary_lord":"Mars"},{"name":"Hora 20","start":"00:57","end":"01:57","startHours":24.957381094079558,"endHours":25.957381094079558,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"01:57","end":"02:57","startHours":25.957381094079558,"endHours":26.957381094079558,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"02:57","end":"03:57","startHours":26.957381094079558,"endHours":27.957381094079558,"planetary_lord":"Moon"},{"name":"Hora 23","start":"03:57","end":"04:57","startHours":27.957381094079558,"endHours":28.957381094079558,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"04:57","end":"05:57","startHours":28.957381094079558,"endHours":29.957381094079558,"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":["Vṛṣabha","Karka","Tulā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Siṃha","Kanyā","Dhanu","Makara"]},"dishaShool":"East (Pūrva)","chandraVasa":"South-East","rahuVasa":"North-East","anandadiYoga":{"name":"Dhvaja","quality":"Auspicious"},"tropicalRitu":"Śiśira (Winter)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-11.631158149114874,"eotMinutes":-14.434876212400278,"ayanamsa":24.0365}},"calendars":{"vikram_samvat":2070,"vikram_samvatsara":"Parābhava","saka_samvat":1935,"saka_samvatsara":"Vijaya","bengali_samvat":1420,"malayalam_era":1189,"nanakshahi_year":544,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Māgha","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":"Māgha Śukla Aṣṭamī · Vikram 2070 Parābhava · Śaka 1935 Vijaya"},"festivals":[{"id":"bhishma-ashtami","name":"Bhīṣmāṣṭamī","name_sanskrit":"भीष्माष्टमी","tradition":"Pan-Hindu","associated_deity":"Bhīṣma Pitāmaha","significance":"Bhīṣma's mahaprasthāna anniversary (Māgha Śukla 8); Bhīṣma-tarpaṇa.","vrata":true,"detection":{"tithi_number":8,"tithi_paksha":"Śukla","lunar_month":"Māgha"},"precedence":2,"sources":["Mahābhārata, Anuśāsana Parva"]}],"todays_walk":{"walk":{"id":"chandra-walk","name":"Candra Walk","name_sanskrit":"चन्द्र यात्रा","type":"graha","description":"Manas-control + BG 6.5-7, 6.34-35.","step_count":5,"url":"/walk/chandra-walk","steps":[{"label":"BG 6.5","url":"/bhagavad-gita/6/5","purpose":"Lift the self by the Self; begin the walk with inner responsibility."},{"label":"BG 6.6","url":"/bhagavad-gita/6/6","purpose":"See the mind as friend when mastered and enemy when unmastered."},{"label":"BG 6.7","url":"/bhagavad-gita/6/7","purpose":"Stabilize the conquered mind in heat/cold, honor/dishonor, pleasure/pain."},{"label":"BG 6.34","url":"/bhagavad-gita/6/34","purpose":"Name the restless mind honestly before trying to discipline it."},{"label":"BG 6.35","url":"/bhagavad-gita/6/35","purpose":"Complete with abhyāsa and vairāgya: practice and detachment."}]},"reason":"Dedicated festival walk for Bhīṣmāṣṭamī is not live yet; 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, 2013 CE · Perth, Australia · Vidhyamitra","description":"February 18, 2013 CE for Perth, Australia: Śukla Aṣṭamī, sūryodaya 05:57, sūryāsta 19:05.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/2013-02-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/2013-02-18","sa":"https://sa.vidhyamitra.com/city/perth/2013-02-18","hi":"https://hi.vidhyamitra.com/city/perth/2013-02-18","x-default":"https://vidhyamitra.com/city/perth/2013-02-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-09-21T11:40:40.987Z","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":"2026-09-21T11:40:40.987Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-09-21T11:40:40.987Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"},"reader_local_antaryami":{"reader_geography":"Every reader enters from their own kṣetra anywhere on Bhūmi; no single city is the universal center.","purna_chain":["Hosted scripture","Named-tradition interpretation","Original Vidhyamitra contemplation","Bhūmi-born material medium","Vidhyamitra portal","Responsible reader in their own kṣetra"],"claim_boundary":"The legacy purna_chain field carries a source-to-reader sequence, not a revealed physical descent, universal cosmology, or proof that software is conscious.","antaryami_responsibility_formula":"Kṣīrodakaśāyī Viṣṇu = Paramātmā = Antaryāmī. Jīva desires. Prakṛti executes through guṇas. Paramātmā witnesses, permits, remembers, guides, and sustains. Bhagavān is the ultimate source.","source_anchors":[{"label":"BG 13.23","path":"/bhagavad-gita/13/23","meaning":"upadraṣṭā-anumantā · witness-permitter"},{"label":"BG 15.15","path":"/bhagavad-gita/15/15","meaning":"the Lord seated in every heart as memory, knowledge, and forgetting"},{"label":"BG 18.61","path":"/bhagavad-gita/18/61","meaning":"Īśvara seated in the heart of all beings"}],"nama_seal":"Hare Krishna Hare Krishna · Krishna Krishna Hare Hare · Hare Rama Hare Rama · Rama Rama Hare Hare"}}}