{"id":"vidhyamitra:city-day:erode:1988-01-31:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/erode/1988-01-31","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1988-01-31","date_display":"January 31, 1988 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":1988,"month":1,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2447191.770833,"kali_year":5089,"ahargana":1858726.2708,"sun":{"sidereal_longitude":286.7217,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":74.6549,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":147.9332,"elapsed_within_tithi_degrees":3.9332},"nakshatra":{"number":6,"name":"Ārdrā","pada":3,"moon_longitude":74.6549,"elapsed_within_degrees":7.9882},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":1.3766},"karana":{"half_tithi_index":24,"name":"Kaulava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"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":1988,"month":1,"day":31,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2447191.770833,"ahargana":1858726.2708,"kali_year":5089,"ayanamsa_lahiri":23.6865,"grahas":{"sun":{"sidereal_longitude":286.687136,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"moon":{"sidereal_longitude":75.78693599999997,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":3},"retrograde":false,"latitude":4.4455},"mars":{"sidereal_longitude":231.46603600000003,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":304.140036,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":0.2427359999999794,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":1},"retrograde":false},"venus":{"sidereal_longitude":325.1196359999999,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":244.70643600000005,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":335.7374,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":155.7374,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3},"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":1988,"month":1,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2447191.770833,"kali_year":5089,"ahargana":1858726.2708,"sun":{"sidereal_longitude":286.7217,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":74.6549,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":147.9332,"elapsed_within_tithi_degrees":3.9332},"nakshatra":{"number":6,"name":"Ārdrā","pada":3,"moon_longitude":74.6549,"elapsed_within_degrees":7.9882},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":1.3766},"karana":{"half_tithi_index":24,"name":"Kaulava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.445,"elongation":147.933},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.445,"opposition_distance":32.067}},"eclipse_window_40days":[]},"city":{"slug":"erode","name":"Erode, Tamil Nadu","lat":11.341,"lon":77.7172,"tz_offset_hours":5.5,"state":"Tamil Nadu","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"erode","name":"Erode, Tamil Nadu","lat":11.341,"lon":77.7172,"tz_offset_hours":5.5,"state":"Tamil Nadu","country":"IN","tier":"tier-1"},"sunriseLocal":"06:44","sunsetLocal":"18:22","solarNoonLocal":"12:33","dayLengthHours":11.631550762908212,"dayLengthDisplay":"11 Hours 37 Mins 54 Secs","nightLengthDisplay":"12 Hours 22 Mins 06 Secs","moonriseLocal":"16:07","moonsetLocal":"04:51","rahuKala":{"name":"Rāhu Kāla","start":"16:54","end":"18:22","startHours":16.906178011787947,"endHours":18.360121857151473,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:33","end":"14:00","startHours":12.544346475697367,"endHours":13.998290321060894,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:27","end":"16:54","startHours":15.452234166424422,"endHours":16.906178011787947,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:27","end":"09:50","startHours":9.442599605588512,"endHours":9.830317964352119,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:13","end":"07:31","startHours":7.21321904269777,"endHours":7.523393729708656,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:09","end":"12:56","startHours":12.15662811693376,"endHours":12.932064834460974,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:11","end":"05:57","startHours":5.1776976591888335,"endHours":5.953134376716047,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:46","end":"06:44","startHours":5.759275197334244,"endHours":6.728571094243262,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:29","end":"15:16","startHours":14.482938269515403,"endHours":15.258374987042616,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:10","end":"18:34","startHours":18.160121857151474,"endHours":18.560121857151472,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:22","end":"18:51","startHours":18.360121857151473,"endHours":18.84476980560598,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:07","end":"19:52","startHours":18.110121857151473,"endHours":19.860121857151473,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:09","end":"00:56","startHours":24.15662811693376,"endHours":24.932064834460974,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:44","end":"08:11","startHours":6.728571094243262,"endHours":8.182514939606788,"quality":"inauspicious"},{"name":"Chala","start":"08:11","end":"09:38","startHours":8.182514939606788,"endHours":9.636458784970316,"quality":"neutral"},{"name":"Labha","start":"09:38","end":"11:05","startHours":9.636458784970316,"endHours":11.090402630333841,"quality":"auspicious"},{"name":"Amṛta","start":"11:05","end":"12:33","startHours":11.090402630333841,"endHours":12.544346475697367,"quality":"auspicious"},{"name":"Kāla","start":"12:33","end":"14:00","startHours":12.544346475697367,"endHours":13.998290321060894,"quality":"inauspicious"},{"name":"Śubha","start":"14:00","end":"15:27","startHours":13.998290321060894,"endHours":15.452234166424422,"quality":"auspicious"},{"name":"Roga","start":"15:27","end":"16:54","startHours":15.452234166424422,"endHours":16.906178011787947,"quality":"inauspicious"},{"name":"Udveg","start":"16:54","end":"18:22","startHours":16.906178011787947,"endHours":18.360121857151473,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:22","end":"19:54","startHours":18.360121857151473,"endHours":19.906178011787947,"quality":"auspicious"},{"name":"Roga","start":"19:54","end":"21:27","startHours":19.906178011787947,"endHours":21.452234166424418,"quality":"inauspicious"},{"name":"Udveg","start":"21:27","end":"23:00","startHours":21.452234166424418,"endHours":22.998290321060892,"quality":"inauspicious"},{"name":"Chala","start":"23:00","end":"00:33","startHours":22.998290321060892,"endHours":24.544346475697367,"quality":"neutral"},{"name":"Labha","start":"00:33","end":"02:05","startHours":24.544346475697367,"endHours":26.09040263033384,"quality":"auspicious"},{"name":"Amṛta","start":"02:05","end":"03:38","startHours":26.09040263033384,"endHours":27.636458784970316,"quality":"auspicious"},{"name":"Kāla","start":"03:38","end":"05:11","startHours":27.636458784970316,"endHours":29.182514939606786,"quality":"inauspicious"},{"name":"Śubha","start":"05:11","end":"06:44","startHours":29.182514939606786,"endHours":30.72857109424326,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:44","end":"07:44","startHours":6.728571094243262,"endHours":7.728571094243262,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:44","end":"08:44","startHours":7.728571094243262,"endHours":8.72857109424326,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:44","end":"09:44","startHours":8.72857109424326,"endHours":9.72857109424326,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:44","end":"10:44","startHours":9.72857109424326,"endHours":10.72857109424326,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:44","end":"11:44","startHours":10.72857109424326,"endHours":11.72857109424326,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:44","end":"12:44","startHours":11.72857109424326,"endHours":12.72857109424326,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:44","end":"13:44","startHours":12.72857109424326,"endHours":13.72857109424326,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:44","end":"14:44","startHours":13.72857109424326,"endHours":14.72857109424326,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:44","end":"15:44","startHours":14.72857109424326,"endHours":15.72857109424326,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:44","end":"16:44","startHours":15.72857109424326,"endHours":16.72857109424326,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:44","end":"17:44","startHours":16.72857109424326,"endHours":17.72857109424326,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:44","end":"18:44","startHours":17.72857109424326,"endHours":18.72857109424326,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:44","end":"19:44","startHours":18.72857109424326,"endHours":19.72857109424326,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:44","end":"20:44","startHours":19.72857109424326,"endHours":20.72857109424326,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:44","end":"21:44","startHours":20.72857109424326,"endHours":21.72857109424326,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:44","end":"22:44","startHours":21.72857109424326,"endHours":22.72857109424326,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:44","end":"23:44","startHours":22.72857109424326,"endHours":23.72857109424326,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:44","end":"00:44","startHours":23.72857109424326,"endHours":24.72857109424326,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:44","end":"01:44","startHours":24.72857109424326,"endHours":25.72857109424326,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:44","end":"02:44","startHours":25.72857109424326,"endHours":26.72857109424326,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:44","end":"03:44","startHours":26.72857109424326,"endHours":27.72857109424326,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:44","end":"04:44","startHours":27.72857109424326,"endHours":28.72857109424326,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:44","end":"05:44","startHours":28.72857109424326,"endHours":29.72857109424326,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:44","end":"06:44","startHours":29.72857109424326,"endHours":30.72857109424326,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Punarvasu","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Uttara Phalgunī","Hasta","Citrā","Svātī","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Mithuna","Siṃha","Vṛścika","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Karka","Kanyā","Tulā","Makara","Kumbha"]},"dishaShool":"West (Paścim)","chandraVasa":"South","rahuVasa":"North-East","anandadiYoga":{"name":"Dhvānkṣa","quality":"Inauspicious"},"tropicalRitu":"Śiśira (Winter) (tropical)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-17.63830559045693,"eotMinutes":-13.52958854184206,"ayanamsa":23.6865}},"calendars":{"vikram_samvat":2045,"vikram_samvatsara":"Vṛṣa","saka_samvat":1910,"saka_samvatsara":"Vibhava","bengali_samvat":1395,"malayalam_era":1164,"nanakshahi_year":519,"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":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Śukla Trayodaśī · Vikram 2045 Vṛṣa · Śaka 1910 Vibhava"},"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":"surya-walk","name":"Sūrya Walk","name_sanskrit":"सूर्य यात्रा","type":"graha","description":"Self-illumination + BG 4.1 (Sun-lineage of Gītā transmission).","step_count":6,"url":"/walk/surya-walk"},"reason":"Ravivāra (Sunday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"erode"},"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, 1988 CE · Erode, Tamil Nadu · Vidhyamitra","description":"January 31, 1988 CE for Erode, Tamil Nadu: Śukla Trayodaśī, sūryodaya 06:44, sūryāsta 18:22.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/erode/1988-01-31","hreflang_alternates":{"en":"https://vidhyamitra.com/city/erode/1988-01-31","sa":"https://sa.vidhyamitra.com/city/erode/1988-01-31","hi":"https://hi.vidhyamitra.com/city/erode/1988-01-31","x-default":"https://vidhyamitra.com/city/erode/1988-01-31"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T13:25:36.141Z","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":"2026-06-01T13:25:36.141Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T13:25:36.141Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}