{"id":"vidhyamitra:city-day:perth:1987-01-06:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/1987-01-06","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1987-01-06","date_display":"January 6, 1987 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":1987,"month":1,"day":6,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2446801.770833,"kali_year":5088,"ahargana":1858336.2708,"sun":{"sidereal_longitude":261.341,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":337.5247,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":7,"name":"Saptamī","paksha":"Śukla","full_name":"Śukla Saptamī","elongation_degrees":76.1836,"elapsed_within_tithi_degrees":4.1836},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2,"moon_longitude":337.5247,"elapsed_within_degrees":4.1914},"yoga":{"number":18,"name":"Varīyān","sum_longitude":238.8657},"karana":{"half_tithi_index":12,"name":"Gara"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"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":1987,"month":1,"day":6,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2446801.770833,"ahargana":1858336.2708,"kali_year":5088,"ayanamsa_lahiri":23.6716,"grahas":{"sun":{"sidereal_longitude":261.50173700000005,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":340.74953700000003,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":3},"retrograde":false,"latitude":-1.4546},"mars":{"sidereal_longitude":334.74493699999994,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":257.709337,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":325.42913699999997,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":215.136937,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":231.902337,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":356.4014,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":176.4014,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"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":1987,"month":1,"day":6,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2446801.770833,"kali_year":5088,"ahargana":1858336.2708,"sun":{"sidereal_longitude":261.341,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":337.5247,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":7,"name":"Saptamī","paksha":"Śukla","full_name":"Śukla Saptamī","elongation_degrees":76.1836,"elapsed_within_tithi_degrees":4.1836},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2,"moon_longitude":337.5247,"elapsed_within_degrees":4.1914},"yoga":{"number":18,"name":"Varīyān","sum_longitude":238.8657},"karana":{"half_tithi_index":12,"name":"Gara"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-1.455,"elongation":76.184},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-1.455,"opposition_distance":103.816}},"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":"05:18","sunsetLocal":"19:27","solarNoonLocal":"12:22","dayLengthHours":14.150717274835115,"dayLengthDisplay":"14 Hours 09 Mins 03 Secs","nightLengthDisplay":"9 Hours 50 Mins 57 Secs","moonriseLocal":"11:41","moonsetLocal":"23:38","rahuKala":{"name":"Rāhu Kāla","start":"15:55","end":"17:41","startHours":15.911573003825008,"endHours":17.680412663179396,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"08:50","end":"10:36","startHours":8.836214366407452,"endHours":10.605054025761842,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:22","end":"14:09","startHours":12.37389368511623,"endHours":14.142733344470619,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:36","end":"09:04","startHours":8.600369078493532,"endHours":9.07205965432137,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:53","end":"06:16","startHours":5.888148267483469,"endHours":6.265500728145739,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:54","end":"12:51","startHours":11.902203109288392,"endHours":12.845584260944067,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:25","end":"04:21","startHours":3.4117727443873243,"endHours":4.3551538960429985,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:07","end":"05:18","startHours":4.11930860812908,"endHours":5.298535047698673,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:44","end":"15:41","startHours":14.732346564255417,"endHours":15.675727715911092,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:15","end":"19:39","startHours":19.24925232253379,"endHours":19.649252322533787,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:27","end":"20:02","startHours":19.449252322533788,"endHours":20.038865542318582,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:12","end":"20:57","startHours":19.199252322533788,"endHours":20.949252322533788,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:54","end":"00:51","startHours":23.902203109288394,"endHours":24.845584260944065,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"05:18","end":"07:04","startHours":5.298535047698673,"endHours":7.067374707053062,"quality":"inauspicious"},{"name":"Udveg","start":"07:04","end":"08:50","startHours":7.067374707053062,"endHours":8.836214366407452,"quality":"inauspicious"},{"name":"Chala","start":"08:50","end":"10:36","startHours":8.836214366407452,"endHours":10.605054025761842,"quality":"neutral"},{"name":"Labha","start":"10:36","end":"12:22","startHours":10.605054025761842,"endHours":12.37389368511623,"quality":"auspicious"},{"name":"Amṛta","start":"12:22","end":"14:09","startHours":12.37389368511623,"endHours":14.142733344470619,"quality":"auspicious"},{"name":"Kāla","start":"14:09","end":"15:55","startHours":14.142733344470619,"endHours":15.911573003825008,"quality":"inauspicious"},{"name":"Śubha","start":"15:55","end":"17:41","startHours":15.911573003825008,"endHours":17.680412663179396,"quality":"auspicious"},{"name":"Roga","start":"17:41","end":"19:27","startHours":17.680412663179396,"endHours":19.449252322533788,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"19:27","end":"20:41","startHours":19.449252322533788,"endHours":20.6804126631794,"quality":"inauspicious"},{"name":"Śubha","start":"20:41","end":"21:55","startHours":20.6804126631794,"endHours":21.91157300382501,"quality":"auspicious"},{"name":"Roga","start":"21:55","end":"23:09","startHours":21.91157300382501,"endHours":23.14273334447062,"quality":"inauspicious"},{"name":"Udveg","start":"23:09","end":"00:22","startHours":23.14273334447062,"endHours":24.37389368511623,"quality":"inauspicious"},{"name":"Chala","start":"00:22","end":"01:36","startHours":24.37389368511623,"endHours":25.60505402576184,"quality":"neutral"},{"name":"Labha","start":"01:36","end":"02:50","startHours":25.60505402576184,"endHours":26.836214366407454,"quality":"auspicious"},{"name":"Amṛta","start":"02:50","end":"04:04","startHours":26.836214366407454,"endHours":28.067374707053062,"quality":"auspicious"},{"name":"Kāla","start":"04:04","end":"05:18","startHours":28.067374707053062,"endHours":29.29853504769867,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:18","end":"06:18","startHours":5.298535047698673,"endHours":6.298535047698673,"planetary_lord":"Mars"},{"name":"Hora 2","start":"06:18","end":"07:18","startHours":6.298535047698673,"endHours":7.298535047698673,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"07:18","end":"08:18","startHours":7.298535047698673,"endHours":8.298535047698673,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"08:18","end":"09:18","startHours":8.298535047698673,"endHours":9.298535047698673,"planetary_lord":"Moon"},{"name":"Hora 5","start":"09:18","end":"10:18","startHours":9.298535047698673,"endHours":10.298535047698673,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"10:18","end":"11:18","startHours":10.298535047698673,"endHours":11.298535047698673,"planetary_lord":"Venus"},{"name":"Hora 7","start":"11:18","end":"12:18","startHours":11.298535047698673,"endHours":12.298535047698673,"planetary_lord":"Sun"},{"name":"Hora 8","start":"12:18","end":"13:18","startHours":12.298535047698673,"endHours":13.298535047698673,"planetary_lord":"Mars"},{"name":"Hora 9","start":"13:18","end":"14:18","startHours":13.298535047698673,"endHours":14.298535047698673,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"14:18","end":"15:18","startHours":14.298535047698673,"endHours":15.298535047698673,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"15:18","end":"16:18","startHours":15.298535047698673,"endHours":16.29853504769867,"planetary_lord":"Moon"},{"name":"Hora 12","start":"16:18","end":"17:18","startHours":16.29853504769867,"endHours":17.29853504769867,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"17:18","end":"18:18","startHours":17.29853504769867,"endHours":18.29853504769867,"planetary_lord":"Venus"},{"name":"Hora 14","start":"18:18","end":"19:18","startHours":18.29853504769867,"endHours":19.29853504769867,"planetary_lord":"Sun"},{"name":"Hora 15","start":"19:18","end":"20:18","startHours":19.29853504769867,"endHours":20.29853504769867,"planetary_lord":"Mars"},{"name":"Hora 16","start":"20:18","end":"21:18","startHours":20.29853504769867,"endHours":21.29853504769867,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"21:18","end":"22:18","startHours":21.29853504769867,"endHours":22.29853504769867,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"22:18","end":"23:18","startHours":22.29853504769867,"endHours":23.29853504769867,"planetary_lord":"Moon"},{"name":"Hora 19","start":"23:18","end":"00:18","startHours":23.29853504769867,"endHours":24.29853504769867,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"00:18","end":"01:18","startHours":24.29853504769867,"endHours":25.29853504769867,"planetary_lord":"Venus"},{"name":"Hora 21","start":"01:18","end":"02:18","startHours":25.29853504769867,"endHours":26.29853504769867,"planetary_lord":"Sun"},{"name":"Hora 22","start":"02:18","end":"03:18","startHours":26.29853504769867,"endHours":27.29853504769867,"planetary_lord":"Mars"},{"name":"Hora 23","start":"03:18","end":"04:18","startHours":27.29853504769867,"endHours":28.29853504769867,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"04:18","end":"05:18","startHours":28.29853504769867,"endHours":29.29853504769867,"planetary_lord":"Saturn"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Revatī"],"unfavorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Citrā","Svātī","Viśākhā","Anurādhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"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":"North (Uttara)","chandraVasa":"South-West","rahuVasa":"North","anandadiYoga":{"name":"Dhvānkṣa","quality":"Inauspicious"},"tropicalRitu":"Hemanta (Pre-winter) (tropical)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-22.573412280189107,"eotMinutes":-5.875621106973772,"ayanamsa":23.6716}},"calendars":{"vikram_samvat":2044,"vikram_samvatsara":"Vikrama","saka_samvat":1909,"saka_samvatsara":"Prabhava","bengali_samvat":1394,"malayalam_era":1163,"nanakshahi_year":518,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Pauṣa","lunar_month_amanta":"Pauṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Śukla Saptamī · Vikram 2044 Vikrama · Śaka 1909 Prabhava"},"festivals":[],"todays_walk":{"walk":{"id":"mangala-walk","name":"Maṅgala Walk","name_sanskrit":"मङ्गल यात्रा","type":"graha","description":"Right action + BG 2.31-38 (kṣatriya-dharma).","step_count":7,"url":"/walk/mangala-walk"},"reason":"Maṅgalavāra (Tuesday) — 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 January 6, 1987 CE · Perth, Australia · Vidhyamitra","description":"January 6, 1987 CE for Perth, Australia: Śukla Saptamī, sūryodaya 05:18, sūryāsta 19:27.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/1987-01-06","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/1987-01-06","sa":"https://sa.vidhyamitra.com/city/perth/1987-01-06","hi":"https://hi.vidhyamitra.com/city/perth/1987-01-06","x-default":"https://vidhyamitra.com/city/perth/1987-01-06"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T22:52:27.031Z","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":"2026-05-31T22:52:27.031Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T22:52:27.031Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}