{"id":"vidhyamitra:city-day:mathura:1981-02-10:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/mathura/1981-02-10","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-02-10","date_display":"February 10, 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":2,"day":10,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444645.770833,"kali_year":5082,"ahargana":1856180.2708,"sun":{"sidereal_longitude":297.7493,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":3.6222,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":6,"name":"Ṣaṣṭhī","paksha":"Śukla","full_name":"Śukla Ṣaṣṭhī","elongation_degrees":65.8728,"elapsed_within_tithi_degrees":5.8728},"nakshatra":{"number":1,"name":"Aśvinī","pada":2,"moon_longitude":3.6222,"elapsed_within_degrees":3.6222},"yoga":{"number":23,"name":"Śubha","sum_longitude":301.3715},"karana":{"half_tithi_index":10,"name":"Kaulava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"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":2,"day":10,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444645.770833,"ahargana":1856180.2708,"kali_year":5082,"ayanamsa_lahiri":23.5891,"grahas":{"sun":{"sidereal_longitude":297.631312,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":5.1011120000000005,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false,"latitude":-4.3027},"mars":{"sidereal_longitude":309.151612,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":311.443212,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":166.43991200000005,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"venus":{"sidereal_longitude":283.9413119999999,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":165.53331200000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":110.6367,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":290.6367,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":2,"day":10,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444645.770833,"kali_year":5082,"ahargana":1856180.2708,"sun":{"sidereal_longitude":297.7493,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":3.6222,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":6,"name":"Ṣaṣṭhī","paksha":"Śukla","full_name":"Śukla Ṣaṣṭhī","elongation_degrees":65.8728,"elapsed_within_tithi_degrees":5.8728},"nakshatra":{"number":1,"name":"Aśvinī","pada":2,"moon_longitude":3.6222,"elapsed_within_degrees":3.6222},"yoga":{"number":23,"name":"Śubha","sum_longitude":301.3715},"karana":{"half_tithi_index":10,"name":"Kaulava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.303,"elongation":65.873},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.303,"opposition_distance":114.127}},"eclipse_window_40days":[{"offset_days":-5,"type":"solar","occurs":true,"moon_latitude":-0.15,"elongation":0.162}]},"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":"07:01","sunsetLocal":"18:07","solarNoonLocal":"12:34","dayLengthHours":11.104641034761201,"dayLengthDisplay":"11 Hours 06 Mins 17 Secs","nightLengthDisplay":"12 Hours 53 Mins 43 Secs","moonriseLocal":"10:38","moonsetLocal":"23:30","rahuKala":{"name":"Rāhu Kāla","start":"15:20","end":"16:44","startHours":15.340358350215705,"endHours":16.728438479560857,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:47","end":"11:11","startHours":9.788037832835105,"endHours":11.176117962180257,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:34","end":"13:57","startHours":12.564198091525405,"endHours":13.952278220870557,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:36","end":"09:58","startHours":9.602960482255753,"endHours":9.973115183414459,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:28","end":"07:46","startHours":7.474570950593189,"endHours":7.770694711520155,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:12","end":"12:56","startHours":12.194043390366698,"endHours":12.934352792684113,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:32","end":"06:16","startHours":5.531258769509979,"endHours":6.271568171827393,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:05","end":"07:01","startHours":6.086490821248039,"endHours":7.011877574144806,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:25","end":"15:09","startHours":14.414971597318939,"endHours":15.155280999636352,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:55","end":"18:19","startHours":17.916518608906006,"endHours":18.316518608906005,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:07","end":"18:35","startHours":18.116518608906006,"endHours":18.57921198535439,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:52","end":"19:37","startHours":17.866518608906006,"endHours":19.616518608906006,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:12","end":"00:56","startHours":24.194043390366698,"endHours":24.934352792684113,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"07:01","end":"08:24","startHours":7.011877574144806,"endHours":8.399957703489957,"quality":"inauspicious"},{"name":"Udveg","start":"08:24","end":"09:47","startHours":8.399957703489957,"endHours":9.788037832835105,"quality":"inauspicious"},{"name":"Chala","start":"09:47","end":"11:11","startHours":9.788037832835105,"endHours":11.176117962180257,"quality":"neutral"},{"name":"Labha","start":"11:11","end":"12:34","startHours":11.176117962180257,"endHours":12.564198091525405,"quality":"auspicious"},{"name":"Amṛta","start":"12:34","end":"13:57","startHours":12.564198091525405,"endHours":13.952278220870557,"quality":"auspicious"},{"name":"Kāla","start":"13:57","end":"15:20","startHours":13.952278220870557,"endHours":15.340358350215705,"quality":"inauspicious"},{"name":"Śubha","start":"15:20","end":"16:44","startHours":15.340358350215705,"endHours":16.728438479560857,"quality":"auspicious"},{"name":"Roga","start":"16:44","end":"18:07","startHours":16.728438479560857,"endHours":18.116518608906006,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"18:07","end":"19:44","startHours":18.116518608906006,"endHours":19.728438479560857,"quality":"inauspicious"},{"name":"Śubha","start":"19:44","end":"21:20","startHours":19.728438479560857,"endHours":21.340358350215705,"quality":"auspicious"},{"name":"Roga","start":"21:20","end":"22:57","startHours":21.340358350215705,"endHours":22.952278220870554,"quality":"inauspicious"},{"name":"Udveg","start":"22:57","end":"00:34","startHours":22.952278220870554,"endHours":24.564198091525405,"quality":"inauspicious"},{"name":"Chala","start":"00:34","end":"02:11","startHours":24.564198091525405,"endHours":26.176117962180257,"quality":"neutral"},{"name":"Labha","start":"02:11","end":"03:47","startHours":26.176117962180257,"endHours":27.788037832835105,"quality":"auspicious"},{"name":"Amṛta","start":"03:47","end":"05:24","startHours":27.788037832835105,"endHours":29.399957703489953,"quality":"auspicious"},{"name":"Kāla","start":"05:24","end":"07:01","startHours":29.399957703489953,"endHours":31.011877574144805,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:01","end":"08:01","startHours":7.011877574144806,"endHours":8.011877574144805,"planetary_lord":"Mars"},{"name":"Hora 2","start":"08:01","end":"09:01","startHours":8.011877574144805,"endHours":9.011877574144805,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"09:01","end":"10:01","startHours":9.011877574144805,"endHours":10.011877574144805,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"10:01","end":"11:01","startHours":10.011877574144805,"endHours":11.011877574144805,"planetary_lord":"Moon"},{"name":"Hora 5","start":"11:01","end":"12:01","startHours":11.011877574144805,"endHours":12.011877574144805,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"12:01","end":"13:01","startHours":12.011877574144805,"endHours":13.011877574144805,"planetary_lord":"Venus"},{"name":"Hora 7","start":"13:01","end":"14:01","startHours":13.011877574144805,"endHours":14.011877574144805,"planetary_lord":"Sun"},{"name":"Hora 8","start":"14:01","end":"15:01","startHours":14.011877574144805,"endHours":15.011877574144805,"planetary_lord":"Mars"},{"name":"Hora 9","start":"15:01","end":"16:01","startHours":15.011877574144805,"endHours":16.011877574144805,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"16:01","end":"17:01","startHours":16.011877574144805,"endHours":17.011877574144805,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"17:01","end":"18:01","startHours":17.011877574144805,"endHours":18.011877574144805,"planetary_lord":"Moon"},{"name":"Hora 12","start":"18:01","end":"19:01","startHours":18.011877574144805,"endHours":19.011877574144805,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"19:01","end":"20:01","startHours":19.011877574144805,"endHours":20.011877574144805,"planetary_lord":"Venus"},{"name":"Hora 14","start":"20:01","end":"21:01","startHours":20.011877574144805,"endHours":21.011877574144805,"planetary_lord":"Sun"},{"name":"Hora 15","start":"21:01","end":"22:01","startHours":21.011877574144805,"endHours":22.011877574144805,"planetary_lord":"Mars"},{"name":"Hora 16","start":"22:01","end":"23:01","startHours":22.011877574144805,"endHours":23.011877574144805,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"23:01","end":"00:01","startHours":23.011877574144805,"endHours":24.011877574144805,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"00:01","end":"01:01","startHours":24.011877574144805,"endHours":25.011877574144805,"planetary_lord":"Moon"},{"name":"Hora 19","start":"01:01","end":"02:01","startHours":25.011877574144805,"endHours":26.011877574144805,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"02:01","end":"03:01","startHours":26.011877574144805,"endHours":27.011877574144805,"planetary_lord":"Venus"},{"name":"Hora 21","start":"03:01","end":"04:01","startHours":27.011877574144805,"endHours":28.011877574144805,"planetary_lord":"Sun"},{"name":"Hora 22","start":"04:01","end":"05:01","startHours":28.011877574144805,"endHours":29.011877574144805,"planetary_lord":"Mars"},{"name":"Hora 23","start":"05:01","end":"06:01","startHours":29.011877574144805,"endHours":30.011877574144805,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"06:01","end":"07:01","startHours":30.011877574144805,"endHours":31.011877574144805,"planetary_lord":"Saturn"}],"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":["Meṣa","Mithuna","Kanyā","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Karka","Siṃha","Vṛścika","Dhanu","Mīna"]},"dishaShool":"North (Uttara)","chandraVasa":"East","rahuVasa":"North","anandadiYoga":{"name":"Vajra","quality":"Inauspicious"},"drikRitu":"Śiśira (Winter) (Drik)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-14.424866562619428,"eotMinutes":-14.546685491524224,"ayanamsa":23.5891}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Śukla Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Śukla Ṣaṣṭhī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"makara-sankranti","name":"Makara Saṅkrānti (Uttarāyaṇa)","name_sanskrit":"मकर सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Capricorn; Uttarāyaṇa (north-going) begins. Bhīṣma's chosen mahaprasthāna time.","vrata":true,"detection":{"sun_rashi":"Makara"},"precedence":1,"sources":["Mahābhārata Bhīṣma-Stuti","Sūrya-Siddhānta"]},{"id":"pongal","name":"Pongal / Thai Pongal","name_sanskrit":"पोङ्गल","tradition":"Regional","associated_deity":"Sūrya Bhagavān","significance":"Tamil 4-day harvest festival; coincides with Makara Saṅkrānti.","vrata":false,"detection":{"sun_rashi":"Makara"},"precedence":2}],"todays_walk":{"walk":{"id":"mangala-walk","name":"Maṅgala Walk","name_sanskrit":"मङ्गल यात्रा","type":"graha","description":"Right action + BG 2.31-38 (kṣatriya-dharma).","step_count":7,"url":"/walk/mangala-walk"},"reason":"Maṅgalavāra (Tuesday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3101-02-18","event":"Kali Yuga Epoch","chart_id":"kali-yuga-epoch","shared_marker":"same Aśvinī","url":"/day/-3101-02-18","relevance":0.5}]},"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 February 10, 1981 CE · Mathurā · Vidhyamitra","description":"February 10, 1981 CE for Mathurā: Śukla Ṣaṣṭhī, sūryodaya 07:01, sūryāsta 18:07.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/mathura/1981-02-10","hreflang_alternates":{"en":"https://vidhyamitra.com/city/mathura/1981-02-10","sa":"https://sa.vidhyamitra.com/city/mathura/1981-02-10","hi":"https://hi.vidhyamitra.com/city/mathura/1981-02-10","x-default":"https://vidhyamitra.com/city/mathura/1981-02-10"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T17:34:24.365Z","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":"2026-05-14T17:34:24.365Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T17:34:24.365Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}