{"id":"vidhyamitra:city-day:perth:1998-01-07:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1998-01-07","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1998-01-07","date_display":"January 7, 1998 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":1998,"month":1,"day":7,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2450820.770833,"kali_year":5099,"ahargana":1862355.2708,"sun":{"sidereal_longitude":262.527,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":11.0803,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":10,"name":"Daśamī","paksha":"Śukla","full_name":"Śukla Daśamī","elongation_degrees":108.5533,"elapsed_within_tithi_degrees":0.5533},"nakshatra":{"number":1,"name":"Aśvinī","pada":4,"moon_longitude":11.0803,"elapsed_within_degrees":11.0803},"yoga":{"number":21,"name":"Siddha","sum_longitude":273.6073},"karana":{"half_tithi_index":18,"name":"Taitila"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"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":1998,"month":1,"day":7,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2450820.770833,"ahargana":1862355.2708,"kali_year":5099,"ayanamsa_lahiri":23.8253,"grahas":{"sun":{"sidereal_longitude":262.70338100000004,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":11.452480999999977,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":4},"retrograde":false,"latitude":-3.3228},"mars":{"sidereal_longitude":291.71738099999993,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":239.601181,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":299.69098099999997,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":277.53348099999994,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":true},"saturn":{"sidereal_longitude":350.103581,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":143.4555,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":323.4555,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","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":1998,"month":1,"day":7,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2450820.770833,"kali_year":5099,"ahargana":1862355.2708,"sun":{"sidereal_longitude":262.527,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":11.0803,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":10,"name":"Daśamī","paksha":"Śukla","full_name":"Śukla Daśamī","elongation_degrees":108.5533,"elapsed_within_tithi_degrees":0.5533},"nakshatra":{"number":1,"name":"Aśvinī","pada":4,"moon_longitude":11.0803,"elapsed_within_degrees":11.0803},"yoga":{"number":21,"name":"Siddha","sum_longitude":273.6073},"karana":{"half_tithi_index":18,"name":"Taitila"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.323,"elongation":108.553},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.323,"opposition_distance":71.447}},"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":"05:19","sunsetLocal":"19:27","solarNoonLocal":"12:23","dayLengthHours":14.134392440410679,"dayLengthDisplay":"14 Hours 08 Mins 04 Secs","nightLengthDisplay":"9 Hours 51 Mins 56 Secs","moonriseLocal":"14:09","moonsetLocal":"01:07","rahuKala":{"name":"Rāhu Kāla","start":"12:23","end":"14:09","startHours":12.380834571790327,"endHours":14.14763362684166,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"07:05","end":"08:51","startHours":7.080437406636322,"endHours":8.847236461687658,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:37","end":"12:23","startHours":10.61403551673899,"endHours":12.380834571790327,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:37","end":"09:05","startHours":8.611663254347478,"endHours":9.082809669027835,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:54","end":"06:17","startHours":5.902571369935432,"endHours":6.279488501679716,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:55","end":"12:51","startHours":11.90968815710997,"endHours":12.851980986470684,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:26","end":"04:22","startHours":3.4290526928635634,"endHours":4.371345522224275,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:08","end":"05:19","startHours":4.135772314884097,"endHours":5.313638351584987,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:44","end":"15:41","startHours":14.736566645192106,"endHours":15.678859474552818,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:15","end":"19:39","startHours":19.248030791995667,"endHours":19.648030791995666,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:27","end":"20:02","startHours":19.448030791995667,"endHours":20.036963810346112,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:12","end":"20:57","startHours":19.198030791995667,"endHours":20.948030791995667,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:55","end":"00:51","startHours":23.909688157109972,"endHours":24.851980986470682,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"05:19","end":"07:05","startHours":5.313638351584987,"endHours":7.080437406636322,"quality":"auspicious"},{"name":"Amṛta","start":"07:05","end":"08:51","startHours":7.080437406636322,"endHours":8.847236461687658,"quality":"auspicious"},{"name":"Kāla","start":"08:51","end":"10:37","startHours":8.847236461687658,"endHours":10.61403551673899,"quality":"inauspicious"},{"name":"Śubha","start":"10:37","end":"12:23","startHours":10.61403551673899,"endHours":12.380834571790327,"quality":"auspicious"},{"name":"Roga","start":"12:23","end":"14:09","startHours":12.380834571790327,"endHours":14.14763362684166,"quality":"inauspicious"},{"name":"Udveg","start":"14:09","end":"15:55","startHours":14.14763362684166,"endHours":15.914432681892997,"quality":"inauspicious"},{"name":"Chala","start":"15:55","end":"17:41","startHours":15.914432681892997,"endHours":17.68123173694433,"quality":"neutral"},{"name":"Labha","start":"17:41","end":"19:27","startHours":17.68123173694433,"endHours":19.448030791995667,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"19:27","end":"20:41","startHours":19.448030791995667,"endHours":20.681231736944333,"quality":"inauspicious"},{"name":"Chala","start":"20:41","end":"21:55","startHours":20.681231736944333,"endHours":21.914432681892997,"quality":"neutral"},{"name":"Labha","start":"21:55","end":"23:09","startHours":21.914432681892997,"endHours":23.14763362684166,"quality":"auspicious"},{"name":"Amṛta","start":"23:09","end":"00:23","startHours":23.14763362684166,"endHours":24.380834571790327,"quality":"auspicious"},{"name":"Kāla","start":"00:23","end":"01:37","startHours":24.380834571790327,"endHours":25.614035516738994,"quality":"inauspicious"},{"name":"Śubha","start":"01:37","end":"02:51","startHours":25.614035516738994,"endHours":26.847236461687658,"quality":"auspicious"},{"name":"Roga","start":"02:51","end":"04:05","startHours":26.847236461687658,"endHours":28.08043740663632,"quality":"inauspicious"},{"name":"Udveg","start":"04:05","end":"05:19","startHours":28.08043740663632,"endHours":29.313638351584988,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:19","end":"06:19","startHours":5.313638351584987,"endHours":6.313638351584987,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"06:19","end":"07:19","startHours":6.313638351584987,"endHours":7.313638351584987,"planetary_lord":"Venus"},{"name":"Hora 3","start":"07:19","end":"08:19","startHours":7.313638351584987,"endHours":8.313638351584988,"planetary_lord":"Sun"},{"name":"Hora 4","start":"08:19","end":"09:19","startHours":8.313638351584988,"endHours":9.313638351584988,"planetary_lord":"Mars"},{"name":"Hora 5","start":"09:19","end":"10:19","startHours":9.313638351584988,"endHours":10.313638351584988,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"10:19","end":"11:19","startHours":10.313638351584988,"endHours":11.313638351584988,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"11:19","end":"12:19","startHours":11.313638351584988,"endHours":12.313638351584988,"planetary_lord":"Moon"},{"name":"Hora 8","start":"12:19","end":"13:19","startHours":12.313638351584988,"endHours":13.313638351584988,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"13:19","end":"14:19","startHours":13.313638351584988,"endHours":14.313638351584988,"planetary_lord":"Venus"},{"name":"Hora 10","start":"14:19","end":"15:19","startHours":14.313638351584988,"endHours":15.313638351584988,"planetary_lord":"Sun"},{"name":"Hora 11","start":"15:19","end":"16:19","startHours":15.313638351584988,"endHours":16.313638351584988,"planetary_lord":"Mars"},{"name":"Hora 12","start":"16:19","end":"17:19","startHours":16.313638351584988,"endHours":17.313638351584988,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"17:19","end":"18:19","startHours":17.313638351584988,"endHours":18.313638351584988,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"18:19","end":"19:19","startHours":18.313638351584988,"endHours":19.313638351584988,"planetary_lord":"Moon"},{"name":"Hora 15","start":"19:19","end":"20:19","startHours":19.313638351584988,"endHours":20.313638351584988,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"20:19","end":"21:19","startHours":20.313638351584988,"endHours":21.313638351584988,"planetary_lord":"Venus"},{"name":"Hora 17","start":"21:19","end":"22:19","startHours":21.313638351584988,"endHours":22.313638351584988,"planetary_lord":"Sun"},{"name":"Hora 18","start":"22:19","end":"23:19","startHours":22.313638351584988,"endHours":23.313638351584988,"planetary_lord":"Mars"},{"name":"Hora 19","start":"23:19","end":"00:19","startHours":23.313638351584988,"endHours":24.313638351584988,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"00:19","end":"01:19","startHours":24.313638351584988,"endHours":25.313638351584988,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"01:19","end":"02:19","startHours":25.313638351584988,"endHours":26.313638351584988,"planetary_lord":"Moon"},{"name":"Hora 22","start":"02:19","end":"03:19","startHours":26.313638351584988,"endHours":27.313638351584988,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"03:19","end":"04:19","startHours":27.313638351584988,"endHours":28.313638351584988,"planetary_lord":"Venus"},{"name":"Hora 24","start":"04:19","end":"05:19","startHours":28.313638351584988,"endHours":29.313638351584988,"planetary_lord":"Sun"}],"taraBala":{"favorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Svātī","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"unfavorable_nakshatras":["Aśvinī","Punarvasu","Puṣya","Aśleṣā","Maghā","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Mithuna","Kanyā","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Karka","Siṃha","Vṛścika","Dhanu","Mīna"]},"dishaShool":"North (Uttara)","chandraVasa":"East","rahuVasa":"South-West","anandadiYoga":{"name":"Mānasa","quality":"Auspicious"},"drikRitu":"Hemanta (Pre-winter) (Drik)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-22.414053590060885,"eotMinutes":-6.292074307419696,"ayanamsa":23.8253}},"calendars":{"vikram_samvat":2055,"vikram_samvatsara":"Khara","saka_samvat":1920,"saka_samvatsara":"Bahudhānya","bengali_samvat":1405,"malayalam_era":1174,"nanakshahi_year":529,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Śukla Pakṣa","solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Śukla Daśamī · Vikram 2055 Khara · Śaka 1920 Bahudhānya"},"festivals":[{"id":"lohri","name":"Lohri","name_sanskrit":"लोहड़ी","tradition":"Regional","significance":"Punjab harvest festival; eve of Makara Saṅkrānti. (Approximated as 13/14 January annually; correct via Sun in Dhanu/Makara cusp.)","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":4},{"id":"dhanu-sankranti","name":"Dhanu Saṅkrānti","name_sanskrit":"धनु सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Sagittarius; Dhanu-māsa (Khara-māsa).","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":5}],"todays_walk":{"walk":{"id":"budha-walk","name":"Budha Walk","name_sanskrit":"बुध यात्रा","type":"graha","description":"Discrimination + BG 2.41 (vyavasāyātmikā buddhi).","step_count":6,"url":"/walk/budha-walk"},"reason":"Budhavāra (Wednesday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3101-02-18","event":"Kali Yuga Epoch","chart_id":"kali-yuga-epoch","shared_marker":"same Aśvinī","url":"/day/-3101-02-18","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 January 7, 1998 CE · Perth, Australia · Vidhyamitra","description":"January 7, 1998 CE for Perth, Australia: Śukla Daśamī, sūryodaya 05:19, sūryāsta 19:27.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1998-01-07","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1998-01-07","sa":"https://sa.vidhyamitra.com/city/perth/1998-01-07","hi":"https://hi.vidhyamitra.com/city/perth/1998-01-07","x-default":"https://vidhyamitra.com/city/perth/1998-01-07"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-17T03:40:06.977Z","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":"2026-05-17T03:40:06.978Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-17T03:40:06.978Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}