{"id":"vidhyamitra:city-day:erode:1973-05-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/erode/1973-05-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1973-05-13","date_display":"May 13, 1973 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":1973,"month":5,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441815.770833,"kali_year":5075,"ahargana":1853350.2708,"sun":{"sidereal_longitude":28.7159,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":160.1353,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":131.4194,"elapsed_within_tithi_degrees":11.4194},"nakshatra":{"number":13,"name":"Hasta","pada":1,"moon_longitude":160.1353,"elapsed_within_degrees":0.1353},"yoga":{"number":15,"name":"Vajra","sum_longitude":188.8512},"karana":{"half_tithi_index":21,"name":"Viṣṭi"},"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":1973,"month":5,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2441815.770833,"ahargana":1853350.2708,"kali_year":5075,"ayanamsa_lahiri":23.4809,"grahas":{"sun":{"sidereal_longitude":28.660237999999993,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":161.52383800000007,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":false,"latitude":-4.4252},"mars":{"sidereal_longitude":310.304838,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":20.287138000000027,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":288.56143799999995,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"venus":{"sidereal_longitude":37.74733800000001,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":56.63293799999997,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":260.5837,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":80.5837,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","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":1973,"month":5,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441815.770833,"kali_year":5075,"ahargana":1853350.2708,"sun":{"sidereal_longitude":28.7159,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":160.1353,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":131.4194,"elapsed_within_tithi_degrees":11.4194},"nakshatra":{"number":13,"name":"Hasta","pada":1,"moon_longitude":160.1353,"elapsed_within_degrees":0.1353},"yoga":{"number":15,"name":"Vajra","sum_longitude":188.8512},"karana":{"half_tithi_index":21,"name":"Viṣṭi"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.425,"elongation":131.419},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.425,"opposition_distance":48.581}},"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":"05:57","sunsetLocal":"18:34","solarNoonLocal":"12:15","dayLengthHours":12.62678673823384,"dayLengthDisplay":"12 Hours 37 Mins 36 Secs","nightLengthDisplay":"11 Hours 22 Mins 24 Secs","moonriseLocal":"15:06","moonsetLocal":"03:08","rahuKala":{"name":"Rāhu Kāla","start":"16:59","end":"18:34","startHours":16.991341047778416,"endHours":18.569689390057647,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:15","end":"13:50","startHours":12.256296020940727,"endHours":13.834644363219956,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:25","end":"16:59","startHours":15.412992705499185,"endHours":16.991341047778416,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:53","end":"09:19","startHours":8.889152890745036,"endHours":9.310045782019497,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:28","end":"06:48","startHours":6.469018765916883,"endHours":6.805733078936452,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:50","end":"12:41","startHours":11.835403129666267,"endHours":12.677188912215188,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:16","end":"05:06","startHours":4.259331086725961,"endHours":5.101116869274884,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:53","end":"05:57","startHours":4.890670423637653,"endHours":5.942902651823807,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:22","end":"15:12","startHours":14.360760477313033,"endHours":15.202546259861956,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:22","end":"18:46","startHours":18.369689390057648,"endHours":18.769689390057646,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:34","end":"19:06","startHours":18.569689390057647,"endHours":19.095805504150725,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:19","end":"20:04","startHours":18.319689390057647,"endHours":20.069689390057647,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:50","end":"00:41","startHours":23.835403129666265,"endHours":24.67718891221519,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:57","end":"07:31","startHours":5.942902651823807,"endHours":7.5212509941030365,"quality":"inauspicious"},{"name":"Chala","start":"07:31","end":"09:06","startHours":7.5212509941030365,"endHours":9.099599336382266,"quality":"neutral"},{"name":"Labha","start":"09:06","end":"10:41","startHours":9.099599336382266,"endHours":10.677947678661496,"quality":"auspicious"},{"name":"Amṛta","start":"10:41","end":"12:15","startHours":10.677947678661496,"endHours":12.256296020940727,"quality":"auspicious"},{"name":"Kāla","start":"12:15","end":"13:50","startHours":12.256296020940727,"endHours":13.834644363219956,"quality":"inauspicious"},{"name":"Śubha","start":"13:50","end":"15:25","startHours":13.834644363219956,"endHours":15.412992705499185,"quality":"auspicious"},{"name":"Roga","start":"15:25","end":"16:59","startHours":15.412992705499185,"endHours":16.991341047778416,"quality":"inauspicious"},{"name":"Udveg","start":"16:59","end":"18:34","startHours":16.991341047778416,"endHours":18.569689390057647,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:34","end":"19:59","startHours":18.569689390057647,"endHours":19.991341047778416,"quality":"auspicious"},{"name":"Roga","start":"19:59","end":"21:25","startHours":19.991341047778416,"endHours":21.412992705499185,"quality":"inauspicious"},{"name":"Udveg","start":"21:25","end":"22:50","startHours":21.412992705499185,"endHours":22.834644363219958,"quality":"inauspicious"},{"name":"Chala","start":"22:50","end":"00:15","startHours":22.834644363219958,"endHours":24.256296020940727,"quality":"neutral"},{"name":"Labha","start":"00:15","end":"01:41","startHours":24.256296020940727,"endHours":25.677947678661496,"quality":"auspicious"},{"name":"Amṛta","start":"01:41","end":"03:06","startHours":25.677947678661496,"endHours":27.09959933638227,"quality":"auspicious"},{"name":"Kāla","start":"03:06","end":"04:31","startHours":27.09959933638227,"endHours":28.52125099410304,"quality":"inauspicious"},{"name":"Śubha","start":"04:31","end":"05:57","startHours":28.52125099410304,"endHours":29.942902651823808,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:57","end":"06:57","startHours":5.942902651823807,"endHours":6.942902651823807,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:57","end":"07:57","startHours":6.942902651823807,"endHours":7.942902651823807,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:57","end":"08:57","startHours":7.942902651823807,"endHours":8.942902651823808,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:57","end":"09:57","startHours":8.942902651823808,"endHours":9.942902651823808,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:57","end":"10:57","startHours":9.942902651823808,"endHours":10.942902651823808,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:57","end":"11:57","startHours":10.942902651823808,"endHours":11.942902651823808,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:57","end":"12:57","startHours":11.942902651823808,"endHours":12.942902651823808,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:57","end":"13:57","startHours":12.942902651823808,"endHours":13.942902651823808,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:57","end":"14:57","startHours":13.942902651823808,"endHours":14.942902651823808,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:57","end":"15:57","startHours":14.942902651823808,"endHours":15.942902651823808,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:57","end":"16:57","startHours":15.942902651823808,"endHours":16.942902651823808,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:57","end":"17:57","startHours":16.942902651823808,"endHours":17.942902651823808,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:57","end":"18:57","startHours":17.942902651823808,"endHours":18.942902651823808,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:57","end":"19:57","startHours":18.942902651823808,"endHours":19.942902651823808,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:57","end":"20:57","startHours":19.942902651823808,"endHours":20.942902651823808,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:57","end":"21:57","startHours":20.942902651823808,"endHours":21.942902651823808,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:57","end":"22:57","startHours":21.942902651823808,"endHours":22.942902651823808,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:57","end":"23:57","startHours":22.942902651823808,"endHours":23.942902651823808,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:57","end":"00:57","startHours":23.942902651823808,"endHours":24.942902651823808,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:57","end":"01:57","startHours":24.942902651823808,"endHours":25.942902651823808,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:57","end":"02:57","startHours":25.942902651823808,"endHours":26.942902651823808,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:57","end":"03:57","startHours":26.942902651823808,"endHours":27.942902651823808,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:57","end":"04:57","startHours":27.942902651823808,"endHours":28.942902651823808,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:57","end":"05:57","startHours":28.942902651823808,"endHours":29.942902651823808,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Citrā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Mithuna","Karka","Kanyā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Tulā","Dhanu","Makara"]},"dishaShool":"West (Paścim)","chandraVasa":"North-West","rahuVasa":"North-East","anandadiYoga":{"name":"Mānasa","quality":"Auspicious"},"drikRitu":"Vasanta (Spring) (Drik)","vedicRitu":"Vasanta (Spring)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":18.301643838995847,"eotMinutes":3.7534387435564067,"ayanamsa":23.4809}},"calendars":{"vikram_samvat":2030,"vikram_samvatsara":"Akṣaya","saka_samvat":1895,"saka_samvatsara":"Pramādī","bengali_samvat":1380,"malayalam_era":1149,"nanakshahi_year":504,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Śukla Pakṣa","solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha Śukla Ekādaśī · Vikram 2030 Akṣaya · Śaka 1895 Pramādī"},"festivals":[{"id":"mesha-sankranti","name":"Meṣa Saṅkrānti (Vaiśākhī / Vishu / Pohelā Boishākh / Bihu)","name_sanskrit":"मेष सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Aries; solar new year. Regional: Vaiśākhī (Punjab) · Vishu (Kerala) · Pohelā Boishākh (Bengal) · Bihu (Assam) · Tamil Puthāṇḍu.","vrata":false,"detection":{"sun_rashi":"Meṣa"},"precedence":1},{"id":"baisakhi","name":"Baisakhi (Vaiśākhī)","name_sanskrit":"वैशाखी","tradition":"Regional","associated_deity":"Sūrya + Khalsa Pantha (Sikh)","significance":"Punjab New Year + Sikh Khalsa founding day.","vrata":false,"detection":{"sun_rashi":"Meṣa"},"precedence":2},{"id":"mohini-ekadashi","name":"Mohinī Ekādaśī","name_sanskrit":"मोहिनी एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu (Mohinī form)","significance":"Mohinī-form of Viṣṇu deceived asuras during samudra-mathana for amṛta.","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":3,"sources":["Bhāgavata 8.9"]},{"id":"ekadashi","name":"Ekādaśī","name_sanskrit":"एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Sacred to Bhagavān Viṣṇu; vrata for purification.","vrata":true,"detection":{"any_of":[{"tithi_number":11},{"tithi_number":26}]},"precedence":5}],"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 May 13, 1973 CE · Erode, Tamil Nadu · Vidhyamitra","description":"May 13, 1973 CE for Erode, Tamil Nadu: Śukla Ekādaśī, sūryodaya 05:57, sūryāsta 18:34.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/erode/1973-05-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/erode/1973-05-13","sa":"https://sa.vidhyamitra.com/city/erode/1973-05-13","hi":"https://hi.vidhyamitra.com/city/erode/1973-05-13","x-default":"https://vidhyamitra.com/city/erode/1973-05-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-19T15:53:36.683Z","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":"2026-05-19T15:53:36.683Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-19T15:53:36.683Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}