{"id":"vidhyamitra:city-day:perth:-3101-01-31:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/perth/-3101-01-31","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"-3101-01-31","date_display":"January 31, 3102 BCE","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":-3101,"month":1,"day":31,"hour":6,"minute":30,"second":0,"calendar":"julian"},"julian_day":588447.770833,"kali_year":0,"ahargana":-17.7292,"sun":{"sidereal_longitude":344.8945,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":121.7245,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":136.83,"elapsed_within_tithi_degrees":4.83},"nakshatra":{"number":10,"name":"Maghā","pada":1,"moon_longitude":121.7245,"elapsed_within_degrees":1.7245},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":106.619},"karana":{"half_tithi_index":22,"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":-3101,"month":1,"day":31,"hour":6,"minute":30,"calendar":"julian"},"julian_day":588447.770833,"ahargana":-17.7292,"kali_year":0,"ayanamsa_lahiri":-47.4035,"grahas":{"sun":{"sidereal_longitude":344.8945,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":121.7245,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false,"latitude":-3.8649},"mars":{"sidereal_longitude":351.9238,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":325.1992,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":357.1688,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"venus":{"sidereal_longitude":339.0321,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":350.3866,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":180.9394,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":0.9394,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","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":-3101,"month":1,"day":31,"hour":6,"minute":30,"second":0,"calendar":"julian"},"julian_day":588447.770833,"kali_year":0,"ahargana":-17.7292,"sun":{"sidereal_longitude":344.8945,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":121.7245,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":136.83,"elapsed_within_tithi_degrees":4.83},"nakshatra":{"number":10,"name":"Maghā","pada":1,"moon_longitude":121.7245,"elapsed_within_degrees":1.7245},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":106.619},"karana":{"half_tithi_index":22,"name":"Bava"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.865,"elongation":136.83},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.865,"opposition_distance":43.17}},"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":"05:31","sunsetLocal":"19:29","solarNoonLocal":"12:30","dayLengthHours":13.957795318460906,"dayLengthDisplay":"13 Hours 57 Mins 28 Secs","nightLengthDisplay":"10 Hours 02 Mins 32 Secs","moonriseLocal":"16:34","moonsetLocal":"02:41","rahuKala":{"name":"Rāhu Kāla","start":"07:16","end":"09:01","startHours":7.267286564607861,"endHours":9.012010979415475,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:45","end":"12:30","startHours":10.756735394223087,"endHours":12.5014598090307,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:15","end":"15:59","startHours":14.246184223838315,"endHours":15.990908638645926,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:47","end":"09:15","startHours":8.779381057441126,"endHours":9.244640901389822,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:06","end":"06:29","startHours":6.104136954736118,"endHours":6.476344829895075,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:02","end":"12:58","startHours":12.036199965082004,"endHours":12.966719652979398,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:40","end":"04:36","startHours":3.66152277400546,"endHours":4.592042461902854,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:22","end":"05:31","startHours":4.359412539928505,"endHours":5.5225621498002475,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:50","end":"15:45","startHours":14.827759028774185,"endHours":15.75827871667158,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:17","end":"19:41","startHours":19.280357468261155,"endHours":19.680357468261153,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:29","end":"20:04","startHours":19.480357468261154,"endHours":20.061932273197026,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:14","end":"20:59","startHours":19.230357468261154,"endHours":20.980357468261154,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:02","end":"00:58","startHours":24.036199965082,"endHours":24.966719652979396,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"05:31","end":"07:16","startHours":5.5225621498002475,"endHours":7.267286564607861,"quality":"auspicious"},{"name":"Kāla","start":"07:16","end":"09:01","startHours":7.267286564607861,"endHours":9.012010979415475,"quality":"inauspicious"},{"name":"Śubha","start":"09:01","end":"10:45","startHours":9.012010979415475,"endHours":10.756735394223087,"quality":"auspicious"},{"name":"Roga","start":"10:45","end":"12:30","startHours":10.756735394223087,"endHours":12.5014598090307,"quality":"inauspicious"},{"name":"Udveg","start":"12:30","end":"14:15","startHours":12.5014598090307,"endHours":14.246184223838315,"quality":"inauspicious"},{"name":"Chala","start":"14:15","end":"15:59","startHours":14.246184223838315,"endHours":15.990908638645926,"quality":"neutral"},{"name":"Labha","start":"15:59","end":"17:44","startHours":15.990908638645926,"endHours":17.73563305345354,"quality":"auspicious"},{"name":"Amṛta","start":"17:44","end":"19:29","startHours":17.73563305345354,"endHours":19.480357468261154,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"19:29","end":"20:44","startHours":19.480357468261154,"endHours":20.73563305345354,"quality":"neutral"},{"name":"Labha","start":"20:44","end":"21:59","startHours":20.73563305345354,"endHours":21.990908638645926,"quality":"auspicious"},{"name":"Amṛta","start":"21:59","end":"23:15","startHours":21.990908638645926,"endHours":23.246184223838313,"quality":"auspicious"},{"name":"Kāla","start":"23:15","end":"00:30","startHours":23.246184223838313,"endHours":24.5014598090307,"quality":"inauspicious"},{"name":"Śubha","start":"00:30","end":"01:45","startHours":24.5014598090307,"endHours":25.756735394223085,"quality":"auspicious"},{"name":"Roga","start":"01:45","end":"03:01","startHours":25.756735394223085,"endHours":27.012010979415475,"quality":"inauspicious"},{"name":"Udveg","start":"03:01","end":"04:16","startHours":27.012010979415475,"endHours":28.26728656460786,"quality":"inauspicious"},{"name":"Chala","start":"04:16","end":"05:31","startHours":28.26728656460786,"endHours":29.522562149800248,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"05:31","end":"06:31","startHours":5.5225621498002475,"endHours":6.5225621498002475,"planetary_lord":"Moon"},{"name":"Hora 2","start":"06:31","end":"07:31","startHours":6.5225621498002475,"endHours":7.5225621498002475,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"07:31","end":"08:31","startHours":7.5225621498002475,"endHours":8.522562149800248,"planetary_lord":"Venus"},{"name":"Hora 4","start":"08:31","end":"09:31","startHours":8.522562149800248,"endHours":9.522562149800248,"planetary_lord":"Sun"},{"name":"Hora 5","start":"09:31","end":"10:31","startHours":9.522562149800248,"endHours":10.522562149800248,"planetary_lord":"Mars"},{"name":"Hora 6","start":"10:31","end":"11:31","startHours":10.522562149800248,"endHours":11.522562149800248,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"11:31","end":"12:31","startHours":11.522562149800248,"endHours":12.522562149800248,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"12:31","end":"13:31","startHours":12.522562149800248,"endHours":13.522562149800248,"planetary_lord":"Moon"},{"name":"Hora 9","start":"13:31","end":"14:31","startHours":13.522562149800248,"endHours":14.522562149800248,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"14:31","end":"15:31","startHours":14.522562149800248,"endHours":15.522562149800248,"planetary_lord":"Venus"},{"name":"Hora 11","start":"15:31","end":"16:31","startHours":15.522562149800248,"endHours":16.522562149800248,"planetary_lord":"Sun"},{"name":"Hora 12","start":"16:31","end":"17:31","startHours":16.522562149800248,"endHours":17.522562149800248,"planetary_lord":"Mars"},{"name":"Hora 13","start":"17:31","end":"18:31","startHours":17.522562149800248,"endHours":18.522562149800248,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"18:31","end":"19:31","startHours":18.522562149800248,"endHours":19.522562149800248,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"19:31","end":"20:31","startHours":19.522562149800248,"endHours":20.522562149800248,"planetary_lord":"Moon"},{"name":"Hora 16","start":"20:31","end":"21:31","startHours":20.522562149800248,"endHours":21.522562149800248,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"21:31","end":"22:31","startHours":21.522562149800248,"endHours":22.522562149800248,"planetary_lord":"Venus"},{"name":"Hora 18","start":"22:31","end":"23:31","startHours":22.522562149800248,"endHours":23.522562149800248,"planetary_lord":"Sun"},{"name":"Hora 19","start":"23:31","end":"00:31","startHours":23.522562149800248,"endHours":24.522562149800248,"planetary_lord":"Mars"},{"name":"Hora 20","start":"00:31","end":"01:31","startHours":24.522562149800248,"endHours":25.522562149800248,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"01:31","end":"02:31","startHours":25.522562149800248,"endHours":26.522562149800248,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"02:31","end":"03:31","startHours":26.522562149800248,"endHours":27.522562149800248,"planetary_lord":"Moon"},{"name":"Hora 23","start":"03:31","end":"04:31","startHours":27.522562149800248,"endHours":28.522562149800248,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"04:31","end":"05:31","startHours":28.522562149800248,"endHours":29.522562149800248,"planetary_lord":"Venus"}],"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":["Vṛṣabha","Mithuna","Siṃha","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Kanyā","Vṛścika","Dhanu","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"West","rahuVasa":"North-East","anandadiYoga":{"name":"Padma","quality":"Auspicious"},"tropicalRitu":"Hemanta (Pre-winter) (tropical)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-20.660009240283607,"eotMinutes":-13.52958854184206,"ayanamsa":-47.4035}},"calendars":{"vikram_samvat":-3044,"saka_samvat":-3179,"bengali_samvat":-3694,"malayalam_era":-3925,"nanakshahi_year":-4570,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Caitra","lunar_month_amanta":"Caitra","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mīna (Paṅkuṇi)","ritu":"Vasanta (Spring)","display_summary":"Caitra Śukla Dvādaśī · Vikram -3044 undefined · Śaka -3179 undefined"},"festivals":[],"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":true,"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 31, 3102 BCE · Perth, Australia · Vidhyamitra","description":"January 31, 3102 BCE for Perth, Australia: Śukla Dvādaśī, sūryodaya 05:31, sūryāsta 19:29.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/perth/-3101-01-31","hreflang_alternates":{"en":"https://vidhyamitra.com/city/perth/-3101-01-31","sa":"https://sa.vidhyamitra.com/city/perth/-3101-01-31","hi":"https://hi.vidhyamitra.com/city/perth/-3101-01-31","x-default":"https://vidhyamitra.com/city/perth/-3101-01-31"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T15:48:32.927Z","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":"2026-06-02T15:48:32.927Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T15:48:32.927Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}