{"id":"vidhyamitra:city-day:perth:1999-05-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1999-05-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1999-05-13","date_display":"May 13, 1999 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":1999,"month":5,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2451311.770833,"kali_year":5101,"ahargana":1862846.2708,"sun":{"sidereal_longitude":28.0178,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":354.7085,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":326.6907,"elapsed_within_tithi_degrees":2.6907},"nakshatra":{"number":27,"name":"Revatī","pada":3,"moon_longitude":354.7085,"elapsed_within_degrees":8.0419},"yoga":{"number":2,"name":"Prīti","sum_longitude":22.7263},"karana":{"half_tithi_index":54,"name":"Gara"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"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":1999,"month":5,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2451311.770833,"ahargana":1862846.2708,"kali_year":5101,"ayanamsa_lahiri":23.8441,"grahas":{"sun":{"sidereal_longitude":28.018920999999978,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":353.185221,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false,"latitude":-3.7843},"mars":{"sidereal_longitude":183.85192099999995,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":4},"retrograde":true},"mercury":{"sidereal_longitude":13.634820999999988,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":357.065621,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"venus":{"sidereal_longitude":71.040821,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":14.865021000000013,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":117.4399,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":297.4399,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","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":1999,"month":5,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2451311.770833,"kali_year":5101,"ahargana":1862846.2708,"sun":{"sidereal_longitude":28.0178,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":354.7085,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":326.6907,"elapsed_within_tithi_degrees":2.6907},"nakshatra":{"number":27,"name":"Revatī","pada":3,"moon_longitude":354.7085,"elapsed_within_degrees":8.0419},"yoga":{"number":2,"name":"Prīti","sum_longitude":22.7263},"karana":{"half_tithi_index":54,"name":"Gara"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.784,"elongation":33.309},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.784,"opposition_distance":146.691}},"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":"06:56","sunsetLocal":"17:30","solarNoonLocal":"12:13","dayLengthHours":10.560058613993355,"dayLengthDisplay":"10 Hours 33 Mins 36 Secs","nightLengthDisplay":"13 Hours 26 Mins 24 Secs","moonriseLocal":"04:07","moonsetLocal":"15:39","rahuKala":{"name":"Rāhu Kāla","start":"13:32","end":"14:51","startHours":13.533416681023228,"endHours":14.853424007772396,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"06:56","end":"08:15","startHours":6.933380047277381,"endHours":8.25338737402655,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"09:34","end":"10:54","startHours":9.573394700775719,"endHours":10.893402027524889,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:24","end":"09:45","startHours":9.39739372387583,"endHours":9.749395677675608,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:22","end":"07:39","startHours":7.373382489527104,"endHours":7.654984052566927,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:52","end":"12:34","startHours":11.861407400474281,"endHours":12.565411308073838,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:32","end":"06:14","startHours":5.525372232078267,"endHours":6.229376139677823,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:03","end":"06:56","startHours":6.053375162777934,"endHours":6.933380047277381,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:58","end":"14:41","startHours":13.97341912327295,"endHours":14.677423030872507,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:18","end":"17:42","startHours":17.293438661270738,"endHours":17.693438661270736,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:30","end":"17:56","startHours":17.493438661270737,"endHours":17.93344110352046,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:15","end":"19:00","startHours":17.243438661270737,"endHours":18.993438661270737,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:52","end":"00:34","startHours":23.86140740047428,"endHours":24.565411308073838,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"06:56","end":"08:15","startHours":6.933380047277381,"endHours":8.25338737402655,"quality":"auspicious"},{"name":"Roga","start":"08:15","end":"09:34","startHours":8.25338737402655,"endHours":9.573394700775719,"quality":"inauspicious"},{"name":"Udveg","start":"09:34","end":"10:54","startHours":9.573394700775719,"endHours":10.893402027524889,"quality":"inauspicious"},{"name":"Chala","start":"10:54","end":"12:13","startHours":10.893402027524889,"endHours":12.21340935427406,"quality":"neutral"},{"name":"Labha","start":"12:13","end":"13:32","startHours":12.21340935427406,"endHours":13.533416681023228,"quality":"auspicious"},{"name":"Amṛta","start":"13:32","end":"14:51","startHours":13.533416681023228,"endHours":14.853424007772396,"quality":"auspicious"},{"name":"Kāla","start":"14:51","end":"16:10","startHours":14.853424007772396,"endHours":16.173431334521567,"quality":"inauspicious"},{"name":"Śubha","start":"16:10","end":"17:30","startHours":16.173431334521567,"endHours":17.493438661270737,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"17:30","end":"19:10","startHours":17.493438661270737,"endHours":19.173431334521567,"quality":"auspicious"},{"name":"Kāla","start":"19:10","end":"20:51","startHours":19.173431334521567,"endHours":20.853424007772396,"quality":"inauspicious"},{"name":"Śubha","start":"20:51","end":"22:32","startHours":20.853424007772396,"endHours":22.53341668102323,"quality":"auspicious"},{"name":"Roga","start":"22:32","end":"00:13","startHours":22.53341668102323,"endHours":24.21340935427406,"quality":"inauspicious"},{"name":"Udveg","start":"00:13","end":"01:54","startHours":24.21340935427406,"endHours":25.89340202752489,"quality":"inauspicious"},{"name":"Chala","start":"01:54","end":"03:34","startHours":25.89340202752489,"endHours":27.573394700775722,"quality":"neutral"},{"name":"Labha","start":"03:34","end":"05:15","startHours":27.573394700775722,"endHours":29.253387374026552,"quality":"auspicious"},{"name":"Amṛta","start":"05:15","end":"06:56","startHours":29.253387374026552,"endHours":30.93338004727738,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:56","end":"07:56","startHours":6.933380047277381,"endHours":7.933380047277381,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"07:56","end":"08:56","startHours":7.933380047277381,"endHours":8.933380047277382,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"08:56","end":"09:56","startHours":8.933380047277382,"endHours":9.933380047277382,"planetary_lord":"Moon"},{"name":"Hora 4","start":"09:56","end":"10:56","startHours":9.933380047277382,"endHours":10.933380047277382,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"10:56","end":"11:56","startHours":10.933380047277382,"endHours":11.933380047277382,"planetary_lord":"Venus"},{"name":"Hora 6","start":"11:56","end":"12:56","startHours":11.933380047277382,"endHours":12.933380047277382,"planetary_lord":"Sun"},{"name":"Hora 7","start":"12:56","end":"13:56","startHours":12.933380047277382,"endHours":13.933380047277382,"planetary_lord":"Mars"},{"name":"Hora 8","start":"13:56","end":"14:56","startHours":13.933380047277382,"endHours":14.933380047277382,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"14:56","end":"15:56","startHours":14.933380047277382,"endHours":15.933380047277382,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"15:56","end":"16:56","startHours":15.933380047277382,"endHours":16.93338004727738,"planetary_lord":"Moon"},{"name":"Hora 11","start":"16:56","end":"17:56","startHours":16.93338004727738,"endHours":17.93338004727738,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"17:56","end":"18:56","startHours":17.93338004727738,"endHours":18.93338004727738,"planetary_lord":"Venus"},{"name":"Hora 13","start":"18:56","end":"19:56","startHours":18.93338004727738,"endHours":19.93338004727738,"planetary_lord":"Sun"},{"name":"Hora 14","start":"19:56","end":"20:56","startHours":19.93338004727738,"endHours":20.93338004727738,"planetary_lord":"Mars"},{"name":"Hora 15","start":"20:56","end":"21:56","startHours":20.93338004727738,"endHours":21.93338004727738,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"21:56","end":"22:56","startHours":21.93338004727738,"endHours":22.93338004727738,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"22:56","end":"23:56","startHours":22.93338004727738,"endHours":23.93338004727738,"planetary_lord":"Moon"},{"name":"Hora 18","start":"23:56","end":"00:56","startHours":23.93338004727738,"endHours":24.93338004727738,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"00:56","end":"01:56","startHours":24.93338004727738,"endHours":25.93338004727738,"planetary_lord":"Venus"},{"name":"Hora 20","start":"01:56","end":"02:56","startHours":25.93338004727738,"endHours":26.93338004727738,"planetary_lord":"Sun"},{"name":"Hora 21","start":"02:56","end":"03:56","startHours":26.93338004727738,"endHours":27.93338004727738,"planetary_lord":"Mars"},{"name":"Hora 22","start":"03:56","end":"04:56","startHours":27.93338004727738,"endHours":28.93338004727738,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"04:56","end":"05:56","startHours":28.93338004727738,"endHours":29.93338004727738,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"05:56","end":"06:56","startHours":29.93338004727738,"endHours":30.93338004727738,"planetary_lord":"Moon"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"unfavorable_nakshatras":["Ārdrā","Punarvasu","Puṣya","Aśleṣā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Siṃha","Kanyā","Dhanu","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Karka","Tulā","Vṛścika","Kumbha"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"South-West","rahuVasa":"North-West","anandadiYoga":{"name":"Lumba","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring) (tropical)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":18.229931577339045,"eotMinutes":3.7534387435564067,"ayanamsa":23.8441}},"calendars":{"vikram_samvat":2056,"vikram_samvatsara":"Nandana","saka_samvat":1921,"saka_samvatsara":"Pramāthi","bengali_samvat":1406,"malayalam_era":1175,"nanakshahi_year":530,"lunar_month":"Jyeṣṭha","lunar_month_paksha_full":"Jyeṣṭha Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Jyeṣṭha","lunar_month_amanta":"Vaiśākha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Grīṣma (Summer)","display_summary":"Jyeṣṭha Kṛṣṇa Trayodaśī · Vikram 2056 Nandana · Śaka 1921 Pramāthi"},"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":"guru-walk","name":"Bṛhaspati Walk","name_sanskrit":"गुरु यात्रा","type":"graha","description":"Wisdom transmission + BG 4.34.","step_count":8,"url":"/walk/guru-walk"},"reason":"Dedicated festival walk for Pradoṣa Vrata is not live yet; Guruvāra (Thursday) — 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 May 13, 1999 CE · Perth, Australia · Vidhyamitra","description":"May 13, 1999 CE for Perth, Australia: Kṛṣṇa Trayodaśī, sūryodaya 06:56, sūryāsta 17:30.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1999-05-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1999-05-13","sa":"https://sa.vidhyamitra.com/city/perth/1999-05-13","hi":"https://hi.vidhyamitra.com/city/perth/1999-05-13","x-default":"https://vidhyamitra.com/city/perth/1999-05-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-09-22T05:07:44.970Z","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":"2026-09-22T05:07:44.970Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-09-22T05:07:44.970Z","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"}}}