{"id":"vidhyamitra:city-day:mathura:1981-09-11:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/mathura/1981-09-11","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-09-11","date_display":"September 11, 1981 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":1981,"month":9,"day":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444858.770833,"kali_year":5083,"ahargana":1856393.2708,"sun":{"sidereal_longitude":143.9548,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":285.0536,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":141.0988,"elapsed_within_tithi_degrees":9.0988},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2,"moon_longitude":285.0536,"elapsed_within_degrees":5.0536},"yoga":{"number":6,"name":"Atigaṇḍa","sum_longitude":69.0084},"karana":{"half_tithi_index":23,"name":"Bālava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"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":1981,"month":9,"day":11,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444858.770833,"ahargana":1856393.2708,"kali_year":5083,"ayanamsa_lahiri":23.5973,"grahas":{"sun":{"sidereal_longitude":144.628673,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":4},"retrograde":false},"moon":{"sidereal_longitude":285.51777300000003,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false,"latitude":-0.4467},"mars":{"sidereal_longitude":102.32287300000002,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":168.34427299999993,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":170.420073,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"venus":{"sidereal_longitude":184.42857300000003,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":165.892873,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":99.3509,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":279.3509,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"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":1981,"month":9,"day":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444858.770833,"kali_year":5083,"ahargana":1856393.2708,"sun":{"sidereal_longitude":143.9548,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":285.0536,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":141.0988,"elapsed_within_tithi_degrees":9.0988},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2,"moon_longitude":285.0536,"elapsed_within_degrees":5.0536},"yoga":{"number":6,"name":"Atigaṇḍa","sum_longitude":69.0084},"karana":{"half_tithi_index":23,"name":"Bālava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-0.447,"elongation":141.099},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-0.447,"opposition_distance":38.901}},"eclipse_window_40days":[]},"city":{"slug":"mathura","name":"Mathurā","lat":27.4924,"lon":77.6737,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"mathura","name":"Mathurā","lat":27.4924,"lon":77.6737,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"sunriseLocal":"06:02","sunsetLocal":"18:29","solarNoonLocal":"12:15","dayLengthHours":12.449591914613386,"dayLengthDisplay":"12 Hours 26 Mins 59 Secs","nightLengthDisplay":"11 Hours 33 Mins 01 Secs","moonriseLocal":"16:15","moonsetLocal":"03:03","rahuKala":{"name":"Rāhu Kāla","start":"10:42","end":"12:15","startHours":10.698647808100615,"endHours":12.254846797427287,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"15:22","end":"16:55","startHours":15.367244776080636,"endHours":16.923443765407306,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:35","end":"09:09","startHours":7.586249829447269,"endHours":9.142448818773943,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:56","end":"09:21","startHours":8.934955620197051,"endHours":9.349942017350832,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:33","end":"06:53","startHours":6.54878383656282,"endHours":6.880772954285844,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:50","end":"12:40","startHours":11.839860400273508,"endHours":12.669833194581066,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:22","end":"05:12","startHours":4.3701052515054775,"endHours":5.2000780458130365,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:00","end":"06:02","startHours":4.992584847236147,"endHours":6.0300508401205954,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:20","end":"15:10","startHours":14.329778783196186,"endHours":15.159751577503746,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:17","end":"18:41","startHours":18.27964275473398,"endHours":18.67964275473398,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:29","end":"19:00","startHours":18.47964275473398,"endHours":18.998375751176205,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:14","end":"19:59","startHours":18.22964275473398,"endHours":19.97964275473398,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:50","end":"00:40","startHours":23.83986040027351,"endHours":24.669833194581066,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"06:02","end":"07:35","startHours":6.0300508401205954,"endHours":7.586249829447269,"quality":"neutral"},{"name":"Labha","start":"07:35","end":"09:09","startHours":7.586249829447269,"endHours":9.142448818773943,"quality":"auspicious"},{"name":"Amṛta","start":"09:09","end":"10:42","startHours":9.142448818773943,"endHours":10.698647808100615,"quality":"auspicious"},{"name":"Kāla","start":"10:42","end":"12:15","startHours":10.698647808100615,"endHours":12.254846797427287,"quality":"inauspicious"},{"name":"Śubha","start":"12:15","end":"13:49","startHours":12.254846797427287,"endHours":13.811045786753962,"quality":"auspicious"},{"name":"Roga","start":"13:49","end":"15:22","startHours":13.811045786753962,"endHours":15.367244776080636,"quality":"inauspicious"},{"name":"Udveg","start":"15:22","end":"16:55","startHours":15.367244776080636,"endHours":16.923443765407306,"quality":"inauspicious"},{"name":"Chala","start":"16:55","end":"18:29","startHours":16.923443765407306,"endHours":18.47964275473398,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"18:29","end":"19:55","startHours":18.47964275473398,"endHours":19.923443765407306,"quality":"inauspicious"},{"name":"Udveg","start":"19:55","end":"21:22","startHours":19.923443765407306,"endHours":21.367244776080632,"quality":"inauspicious"},{"name":"Chala","start":"21:22","end":"22:49","startHours":21.367244776080632,"endHours":22.81104578675396,"quality":"neutral"},{"name":"Labha","start":"22:49","end":"00:15","startHours":22.81104578675396,"endHours":24.254846797427287,"quality":"auspicious"},{"name":"Amṛta","start":"00:15","end":"01:42","startHours":24.254846797427287,"endHours":25.698647808100613,"quality":"auspicious"},{"name":"Kāla","start":"01:42","end":"03:09","startHours":25.698647808100613,"endHours":27.142448818773943,"quality":"inauspicious"},{"name":"Śubha","start":"03:09","end":"04:35","startHours":27.142448818773943,"endHours":28.58624982944727,"quality":"auspicious"},{"name":"Roga","start":"04:35","end":"06:02","startHours":28.58624982944727,"endHours":30.030050840120595,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:02","end":"07:02","startHours":6.0300508401205954,"endHours":7.0300508401205954,"planetary_lord":"Venus"},{"name":"Hora 2","start":"07:02","end":"08:02","startHours":7.0300508401205954,"endHours":8.030050840120595,"planetary_lord":"Sun"},{"name":"Hora 3","start":"08:02","end":"09:02","startHours":8.030050840120595,"endHours":9.030050840120595,"planetary_lord":"Mars"},{"name":"Hora 4","start":"09:02","end":"10:02","startHours":9.030050840120595,"endHours":10.030050840120595,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"10:02","end":"11:02","startHours":10.030050840120595,"endHours":11.030050840120595,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"11:02","end":"12:02","startHours":11.030050840120595,"endHours":12.030050840120595,"planetary_lord":"Moon"},{"name":"Hora 7","start":"12:02","end":"13:02","startHours":12.030050840120595,"endHours":13.030050840120595,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"13:02","end":"14:02","startHours":13.030050840120595,"endHours":14.030050840120595,"planetary_lord":"Venus"},{"name":"Hora 9","start":"14:02","end":"15:02","startHours":14.030050840120595,"endHours":15.030050840120595,"planetary_lord":"Sun"},{"name":"Hora 10","start":"15:02","end":"16:02","startHours":15.030050840120595,"endHours":16.030050840120595,"planetary_lord":"Mars"},{"name":"Hora 11","start":"16:02","end":"17:02","startHours":16.030050840120595,"endHours":17.030050840120595,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"17:02","end":"18:02","startHours":17.030050840120595,"endHours":18.030050840120595,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"18:02","end":"19:02","startHours":18.030050840120595,"endHours":19.030050840120595,"planetary_lord":"Moon"},{"name":"Hora 14","start":"19:02","end":"20:02","startHours":19.030050840120595,"endHours":20.030050840120595,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"20:02","end":"21:02","startHours":20.030050840120595,"endHours":21.030050840120595,"planetary_lord":"Venus"},{"name":"Hora 16","start":"21:02","end":"22:02","startHours":21.030050840120595,"endHours":22.030050840120595,"planetary_lord":"Sun"},{"name":"Hora 17","start":"22:02","end":"23:02","startHours":22.030050840120595,"endHours":23.030050840120595,"planetary_lord":"Mars"},{"name":"Hora 18","start":"23:02","end":"00:02","startHours":23.030050840120595,"endHours":24.030050840120595,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"00:02","end":"01:02","startHours":24.030050840120595,"endHours":25.030050840120595,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"01:02","end":"02:02","startHours":25.030050840120595,"endHours":26.030050840120595,"planetary_lord":"Moon"},{"name":"Hora 21","start":"02:02","end":"03:02","startHours":26.030050840120595,"endHours":27.030050840120595,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"03:02","end":"04:02","startHours":27.030050840120595,"endHours":28.030050840120595,"planetary_lord":"Venus"},{"name":"Hora 23","start":"04:02","end":"05:02","startHours":28.030050840120595,"endHours":29.030050840120595,"planetary_lord":"Sun"},{"name":"Hora 24","start":"05:02","end":"06:02","startHours":29.030050840120595,"endHours":30.030050840120595,"planetary_lord":"Mars"}],"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","Tulā","Vṛścika","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Dhanu","Kumbha"]},"dishaShool":"West (Paścim)","chandraVasa":"South-East","rahuVasa":"South-East","anandadiYoga":{"name":"Padma","quality":"Auspicious"},"drikRitu":"Varṣā (Monsoon) (Drik)","vedicRitu":"Varṣā (Monsoon)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":4.655143466727775,"eotMinutes":4.014392154362758,"ayanamsa":23.5973}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Bhādrapada","lunar_month_paksha_full":"Bhādrapada Śukla Pakṣa","solar_month":"Siṃha (Āvaṇi)","ritu":"Varṣā (Monsoon)","display_summary":"Bhādrapada Śukla Dvādaśī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"vamana-jayanti","name":"Vāmana Jayantī","name_sanskrit":"वामन जयन्ती","tradition":"Vaishnava","associated_deity":"Vāmana (5th daśāvatāra of Krishna)","deity_avatara_index":15,"significance":"Vāmana's three-step measure of all worlds; Bali's surrender. (= Onam in Kerala.)","vrata":true,"detection":{"tithi_number":12,"tithi_paksha":"Śukla","lunar_month":"Bhādrapada"},"precedence":2,"sources":["Bhāgavata 8.18-22"]},{"id":"onam","name":"Onam (Vāmana / King Bali)","name_sanskrit":"ओणम् (वामन-बलि स्मरण)","tradition":"Regional","associated_deity":"Vāmana + King Bali","significance":"Kerala festival; King Bali's annual return to Kerala. Aligned with Thiru-Onam (Śravaṇa nakshatra in Bhādrapada).","vrata":false,"detection":{"nakshatra_name":"Śravaṇa","lunar_month":"Bhādrapada"},"precedence":2},{"id":"simha-sankranti","name":"Siṁha Saṅkrānti","name_sanskrit":"सिंह सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Leo.","vrata":false,"detection":{"sun_rashi":"Siṃha"},"precedence":5}],"todays_walk":{"walk":{"id":"shukra-walk","name":"Śukra Walk","name_sanskrit":"शुक्र यात्रा","type":"graha","description":"Beauty + creativity in dharma + BG 10.36.","step_count":5,"url":"/walk/shukra-walk"},"reason":"Śukravāra (Friday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"mathura"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga September 11, 1981 CE · Mathurā · Vidhyamitra","description":"September 11, 1981 CE for Mathurā: Śukla Dvādaśī, sūryodaya 06:02, sūryāsta 18:29.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/mathura/1981-09-11","hreflang_alternates":{"en":"https://vidhyamitra.com/city/mathura/1981-09-11","sa":"https://sa.vidhyamitra.com/city/mathura/1981-09-11","hi":"https://hi.vidhyamitra.com/city/mathura/1981-09-11","x-default":"https://vidhyamitra.com/city/mathura/1981-09-11"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T17:42:07.281Z","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":"2026-05-14T17:42:07.281Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T17:42:07.281Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}