{"id":"vidhyamitra:city-day:ayodhya:1980-07-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/ayodhya/1980-07-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1980-07-13","date_display":"July 13, 1980 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":1980,"month":7,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444433.770833,"kali_year":5082,"ahargana":1855968.2708,"sun":{"sidereal_longitude":86.8492,"rashi":3,"rashi_name":"Mithuna"},"moon":{"sidereal_longitude":97.9532,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":1,"name":"Pratipada","paksha":"Śukla","full_name":"Śukla Pratipada","elongation_degrees":11.104,"elapsed_within_tithi_degrees":11.104},"nakshatra":{"number":8,"name":"Puṣya","pada":2,"moon_longitude":97.9532,"elapsed_within_degrees":4.6198},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":184.8023},"karana":{"half_tithi_index":1,"name":"Bava"},"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":1980,"month":7,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444433.770833,"ahargana":1855968.2708,"kali_year":5082,"ayanamsa_lahiri":23.581,"grahas":{"sun":{"sidereal_longitude":87.22131200000001,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":3},"retrograde":false},"moon":{"sidereal_longitude":96.37161200000003,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":1},"retrograde":false,"latitude":-1.8227},"mars":{"sidereal_longitude":157.98231199999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":85.37611200000003,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":2},"retrograde":true},"jupiter":{"sidereal_longitude":134.42051199999997,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":false},"venus":{"sidereal_longitude":53.339811999999995,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":148.524312,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":121.8695,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":301.8695,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","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":1980,"month":7,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444433.770833,"kali_year":5082,"ahargana":1855968.2708,"sun":{"sidereal_longitude":86.8492,"rashi":3,"rashi_name":"Mithuna"},"moon":{"sidereal_longitude":97.9532,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":1,"name":"Pratipada","paksha":"Śukla","full_name":"Śukla Pratipada","elongation_degrees":11.104,"elapsed_within_tithi_degrees":11.104},"nakshatra":{"number":8,"name":"Puṣya","pada":2,"moon_longitude":97.9532,"elapsed_within_degrees":4.6198},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":184.8023},"karana":{"half_tithi_index":1,"name":"Bava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-1.823,"elongation":11.104},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-1.823,"opposition_distance":168.896}},"eclipse_window_40days":[{"offset_days":15,"type":"lunar","occurs":true,"moon_latitude":1.393,"opposition_distance":1.959}]},"city":{"slug":"ayodhya","name":"Ayodhyā","lat":26.799,"lon":82.204,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"ayodhya","name":"Ayodhyā","lat":26.799,"lon":82.204,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"sunriseLocal":"05:16","sunsetLocal":"18:57","solarNoonLocal":"12:07","dayLengthHours":13.693382303490353,"dayLengthDisplay":"13 Hours 41 Mins 36 Secs","nightLengthDisplay":"10 Hours 18 Mins 24 Secs","moonriseLocal":"05:58","moonsetLocal":"19:29","rahuKala":{"name":"Rāhu Kāla","start":"17:15","end":"18:57","startHours":17.24410884457823,"endHours":18.955781632514523,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:07","end":"13:49","startHours":12.109090480769346,"endHours":13.82076326870564,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:32","end":"17:15","startHours":15.532436056641934,"endHours":17.24410884457823,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:27","end":"08:55","startHours":8.457521866505251,"endHours":8.913967943288263,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:50","end":"06:12","startHours":5.832956925002934,"endHours":6.198113786429343,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:39","end":"12:34","startHours":11.652644403986335,"endHours":12.565536557552358,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:26","end":"04:21","startHours":3.436615021892122,"endHours":4.349507175458146,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:07","end":"05:16","startHours":4.12128413706664,"endHours":5.262399329024169,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:23","end":"15:18","startHours":14.391320864684403,"endHours":15.304213018250426,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:45","end":"19:09","startHours":18.755781632514523,"endHours":19.155781632514522,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:57","end":"19:32","startHours":18.955781632514523,"endHours":19.52633922849329,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:42","end":"20:27","startHours":18.705781632514523,"endHours":20.455781632514523,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:39","end":"00:34","startHours":23.652644403986333,"endHours":24.56553655755236,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:16","end":"06:58","startHours":5.262399329024169,"endHours":6.974072116960463,"quality":"inauspicious"},{"name":"Chala","start":"06:58","end":"08:41","startHours":6.974072116960463,"endHours":8.685744904896758,"quality":"neutral"},{"name":"Labha","start":"08:41","end":"10:24","startHours":8.685744904896758,"endHours":10.397417692833052,"quality":"auspicious"},{"name":"Amṛta","start":"10:24","end":"12:07","startHours":10.397417692833052,"endHours":12.109090480769346,"quality":"auspicious"},{"name":"Kāla","start":"12:07","end":"13:49","startHours":12.109090480769346,"endHours":13.82076326870564,"quality":"inauspicious"},{"name":"Śubha","start":"13:49","end":"15:32","startHours":13.82076326870564,"endHours":15.532436056641934,"quality":"auspicious"},{"name":"Roga","start":"15:32","end":"17:15","startHours":15.532436056641934,"endHours":17.24410884457823,"quality":"inauspicious"},{"name":"Udveg","start":"17:15","end":"18:57","startHours":17.24410884457823,"endHours":18.955781632514523,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:57","end":"20:15","startHours":18.955781632514523,"endHours":20.24410884457823,"quality":"auspicious"},{"name":"Roga","start":"20:15","end":"21:32","startHours":20.24410884457823,"endHours":21.532436056641934,"quality":"inauspicious"},{"name":"Udveg","start":"21:32","end":"22:49","startHours":21.532436056641934,"endHours":22.82076326870564,"quality":"inauspicious"},{"name":"Chala","start":"22:49","end":"00:07","startHours":22.82076326870564,"endHours":24.109090480769346,"quality":"neutral"},{"name":"Labha","start":"00:07","end":"01:24","startHours":24.109090480769346,"endHours":25.397417692833052,"quality":"auspicious"},{"name":"Amṛta","start":"01:24","end":"02:41","startHours":25.397417692833052,"endHours":26.685744904896758,"quality":"auspicious"},{"name":"Kāla","start":"02:41","end":"03:58","startHours":26.685744904896758,"endHours":27.974072116960464,"quality":"inauspicious"},{"name":"Śubha","start":"03:58","end":"05:16","startHours":27.974072116960464,"endHours":29.26239932902417,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:16","end":"06:16","startHours":5.262399329024169,"endHours":6.262399329024169,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:16","end":"07:16","startHours":6.262399329024169,"endHours":7.262399329024169,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:16","end":"08:16","startHours":7.262399329024169,"endHours":8.26239932902417,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:16","end":"09:16","startHours":8.26239932902417,"endHours":9.26239932902417,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:16","end":"10:16","startHours":9.26239932902417,"endHours":10.26239932902417,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:16","end":"11:16","startHours":10.26239932902417,"endHours":11.26239932902417,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:16","end":"12:16","startHours":11.26239932902417,"endHours":12.26239932902417,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:16","end":"13:16","startHours":12.26239932902417,"endHours":13.26239932902417,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:16","end":"14:16","startHours":13.26239932902417,"endHours":14.26239932902417,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:16","end":"15:16","startHours":14.26239932902417,"endHours":15.26239932902417,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:16","end":"16:16","startHours":15.26239932902417,"endHours":16.26239932902417,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:16","end":"17:16","startHours":16.26239932902417,"endHours":17.26239932902417,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:16","end":"18:16","startHours":17.26239932902417,"endHours":18.26239932902417,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:16","end":"19:16","startHours":18.26239932902417,"endHours":19.26239932902417,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:16","end":"20:16","startHours":19.26239932902417,"endHours":20.26239932902417,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:16","end":"21:16","startHours":20.26239932902417,"endHours":21.26239932902417,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:16","end":"22:16","startHours":21.26239932902417,"endHours":22.26239932902417,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:16","end":"23:16","startHours":22.26239932902417,"endHours":23.26239932902417,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:16","end":"00:16","startHours":23.26239932902417,"endHours":24.26239932902417,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:16","end":"01:16","startHours":24.26239932902417,"endHours":25.26239932902417,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:16","end":"02:16","startHours":25.26239932902417,"endHours":26.26239932902417,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:16","end":"03:16","startHours":26.26239932902417,"endHours":27.26239932902417,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:16","end":"04:16","startHours":27.26239932902417,"endHours":28.26239932902417,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:16","end":"05:16","startHours":28.26239932902417,"endHours":29.26239932902417,"planetary_lord":"Jupiter"}],"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":["Meṣa","Vṛṣabha","Karka","Kanyā","Dhanu","Makara"],"unfavorable_rashis":["Mithuna","Siṃha","Tulā","Vṛścika","Kumbha","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"South-West","rahuVasa":"North-East","anandadiYoga":{"name":"Śrīvatsa","quality":"Auspicious"},"drikRitu":"Grīṣma (Summer) (Drik)","vedicRitu":"Grīṣma (Summer)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":21.826968187675597,"eotMinutes":-5.361428846160681,"ayanamsa":23.581}},"calendars":{"vikram_samvat":2037,"vikram_samvatsara":"Śrīmukha","saka_samvat":1902,"saka_samvatsara":"Raudra","bengali_samvat":1387,"malayalam_era":1156,"nanakshahi_year":511,"lunar_month":"Āṣāḍha","lunar_month_paksha_full":"Āṣāḍha Śukla Pakṣa","solar_month":"Mithuna (Āni)","ritu":"Grīṣma (Summer)","display_summary":"Āṣāḍha Śukla Pratipada · Vikram 2037 Śrīmukha · Śaka 1902 Raudra"},"festivals":[{"id":"ashadha-gupta-navratri-start","name":"Āṣāḍha Gupta Navrātri Start","name_sanskrit":"आषाढ गुप्त नवरात्रि आरम्भ","tradition":"Shakta","associated_deity":"Devī (10 Mahāvidyās)","significance":"Second Gupta Navrātri.","vrata":true,"detection":{"tithi_number":1,"tithi_paksha":"Śukla","lunar_month":"Āṣāḍha"},"precedence":3},{"id":"mithuna-sankranti","name":"Mithuna Saṅkrānti","name_sanskrit":"मिथुन सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Gemini.","vrata":false,"detection":{"sun_rashi":"Mithuna"},"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":"ayodhya"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga July 13, 1980 CE · Ayodhyā · Vidhyamitra","description":"July 13, 1980 CE for Ayodhyā: Śukla Pratipada, sūryodaya 05:16, sūryāsta 18:57.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/ayodhya/1980-07-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/ayodhya/1980-07-13","sa":"https://sa.vidhyamitra.com/city/ayodhya/1980-07-13","hi":"https://hi.vidhyamitra.com/city/ayodhya/1980-07-13","x-default":"https://vidhyamitra.com/city/ayodhya/1980-07-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T03:32:01.294Z","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":"2026-05-18T03:32:01.294Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T03:32:01.294Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}