{"id":"vidhyamitra:city-day:beijing:1981-12-17:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/beijing/1981-12-17","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-12-17","date_display":"December 17, 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":12,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444955.770833,"kali_year":5083,"ahargana":1856490.2708,"sun":{"sidereal_longitude":241.0895,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":134.1193,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":22,"name":"Saptamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Saptamī","elongation_degrees":253.0298,"elapsed_within_tithi_degrees":1.0298},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1,"moon_longitude":134.1193,"elapsed_within_degrees":0.7859},"yoga":{"number":2,"name":"Prīti","sum_longitude":15.2087},"karana":{"half_tithi_index":42,"name":"Viṣṭi"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"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":12,"day":17,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444955.770833,"ahargana":1856490.2708,"kali_year":5083,"ayanamsa_lahiri":23.601,"grahas":{"sun":{"sidereal_longitude":241.412867,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"moon":{"sidereal_longitude":137.21096699999998,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2},"retrograde":false,"latitude":2.8852},"mars":{"sidereal_longitude":157.100867,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":245.26536699999997,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":190.50356699999998,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":2},"retrograde":false},"venus":{"sidereal_longitude":281.56666700000005,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":176.60236699999996,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":94.2114,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":274.2114,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","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":1981,"month":12,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444955.770833,"kali_year":5083,"ahargana":1856490.2708,"sun":{"sidereal_longitude":241.0895,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":134.1193,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":22,"name":"Saptamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Saptamī","elongation_degrees":253.0298,"elapsed_within_tithi_degrees":1.0298},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1,"moon_longitude":134.1193,"elapsed_within_degrees":0.7859},"yoga":{"number":2,"name":"Prīti","sum_longitude":15.2087},"karana":{"half_tithi_index":42,"name":"Viṣṭi"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.885,"elongation":106.97},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.885,"opposition_distance":73.03}},"eclipse_window_40days":[]},"city":{"slug":"beijing","name":"Beijing, Beijing","lat":39.9075,"lon":116.3972,"tz_offset_hours":8,"state":"Beijing","country":"CN","tier":"mega"},"tier2":{"city":{"slug":"beijing","name":"Beijing, Beijing","lat":39.9075,"lon":116.3972,"tz_offset_hours":8,"state":"Beijing","country":"CN","tier":"mega"},"sunriseLocal":"07:31","sunsetLocal":"16:52","solarNoonLocal":"12:11","dayLengthHours":9.347437890971023,"dayLengthDisplay":"9 Hours 20 Mins 51 Secs","nightLengthDisplay":"14 Hours 39 Mins 09 Secs","moonriseLocal":"22:46","moonsetLocal":"11:43","rahuKala":{"name":"Rāhu Kāla","start":"13:21","end":"14:31","startHours":13.354393588419573,"endHours":14.522823324790949,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"07:31","end":"08:41","startHours":7.512244906562683,"endHours":8.680674642934061,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"09:51","end":"11:01","startHours":9.849104379305437,"endHours":11.017534115676817,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:42","end":"10:00","startHours":9.693313747789254,"endHours":10.004895010821622,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:54","end":"08:09","startHours":7.901721485353142,"endHours":8.150986495779035,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:52","end":"12:30","startHours":11.874382589015825,"endHours":12.49754511508056,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"06:16","end":"06:53","startHours":6.265919854433212,"endHours":6.889082380497948,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:44","end":"07:31","startHours":6.733291748981764,"endHours":7.512244906562683,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:45","end":"14:22","startHours":13.74387016721003,"endHours":14.367032693274766,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"16:40","end":"17:04","startHours":16.659682797533705,"endHours":17.059682797533704,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"16:52","end":"17:15","startHours":16.859682797533704,"endHours":17.249159376324165,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"16:37","end":"18:22","startHours":16.609682797533704,"endHours":18.359682797533704,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:52","end":"00:30","startHours":23.874382589015827,"endHours":24.49754511508056,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"07:31","end":"08:41","startHours":7.512244906562683,"endHours":8.680674642934061,"quality":"auspicious"},{"name":"Roga","start":"08:41","end":"09:51","startHours":8.680674642934061,"endHours":9.849104379305437,"quality":"inauspicious"},{"name":"Udveg","start":"09:51","end":"11:01","startHours":9.849104379305437,"endHours":11.017534115676817,"quality":"inauspicious"},{"name":"Chala","start":"11:01","end":"12:11","startHours":11.017534115676817,"endHours":12.185963852048193,"quality":"neutral"},{"name":"Labha","start":"12:11","end":"13:21","startHours":12.185963852048193,"endHours":13.354393588419573,"quality":"auspicious"},{"name":"Amṛta","start":"13:21","end":"14:31","startHours":13.354393588419573,"endHours":14.522823324790949,"quality":"auspicious"},{"name":"Kāla","start":"14:31","end":"15:41","startHours":14.522823324790949,"endHours":15.691253061162328,"quality":"inauspicious"},{"name":"Śubha","start":"15:41","end":"16:52","startHours":15.691253061162328,"endHours":16.859682797533704,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"16:52","end":"18:41","startHours":16.859682797533704,"endHours":18.691253061162328,"quality":"auspicious"},{"name":"Kāla","start":"18:41","end":"20:31","startHours":18.691253061162328,"endHours":20.52282332479095,"quality":"inauspicious"},{"name":"Śubha","start":"20:31","end":"22:21","startHours":20.52282332479095,"endHours":22.35439358841957,"quality":"auspicious"},{"name":"Roga","start":"22:21","end":"00:11","startHours":22.35439358841957,"endHours":24.185963852048193,"quality":"inauspicious"},{"name":"Udveg","start":"00:11","end":"02:01","startHours":24.185963852048193,"endHours":26.017534115676817,"quality":"inauspicious"},{"name":"Chala","start":"02:01","end":"03:51","startHours":26.017534115676817,"endHours":27.849104379305437,"quality":"neutral"},{"name":"Labha","start":"03:51","end":"05:41","startHours":27.849104379305437,"endHours":29.680674642934058,"quality":"auspicious"},{"name":"Amṛta","start":"05:41","end":"07:31","startHours":29.680674642934058,"endHours":31.51224490656268,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:31","end":"08:31","startHours":7.512244906562683,"endHours":8.512244906562682,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"08:31","end":"09:31","startHours":8.512244906562682,"endHours":9.512244906562682,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"09:31","end":"10:31","startHours":9.512244906562682,"endHours":10.512244906562682,"planetary_lord":"Moon"},{"name":"Hora 4","start":"10:31","end":"11:31","startHours":10.512244906562682,"endHours":11.512244906562682,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"11:31","end":"12:31","startHours":11.512244906562682,"endHours":12.512244906562682,"planetary_lord":"Venus"},{"name":"Hora 6","start":"12:31","end":"13:31","startHours":12.512244906562682,"endHours":13.512244906562682,"planetary_lord":"Sun"},{"name":"Hora 7","start":"13:31","end":"14:31","startHours":13.512244906562682,"endHours":14.512244906562682,"planetary_lord":"Mars"},{"name":"Hora 8","start":"14:31","end":"15:31","startHours":14.512244906562682,"endHours":15.512244906562682,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"15:31","end":"16:31","startHours":15.512244906562682,"endHours":16.51224490656268,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"16:31","end":"17:31","startHours":16.51224490656268,"endHours":17.51224490656268,"planetary_lord":"Moon"},{"name":"Hora 11","start":"17:31","end":"18:31","startHours":17.51224490656268,"endHours":18.51224490656268,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"18:31","end":"19:31","startHours":18.51224490656268,"endHours":19.51224490656268,"planetary_lord":"Venus"},{"name":"Hora 13","start":"19:31","end":"20:31","startHours":19.51224490656268,"endHours":20.51224490656268,"planetary_lord":"Sun"},{"name":"Hora 14","start":"20:31","end":"21:31","startHours":20.51224490656268,"endHours":21.51224490656268,"planetary_lord":"Mars"},{"name":"Hora 15","start":"21:31","end":"22:31","startHours":21.51224490656268,"endHours":22.51224490656268,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"22:31","end":"23:31","startHours":22.51224490656268,"endHours":23.51224490656268,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"23:31","end":"00:31","startHours":23.51224490656268,"endHours":24.51224490656268,"planetary_lord":"Moon"},{"name":"Hora 18","start":"00:31","end":"01:31","startHours":24.51224490656268,"endHours":25.51224490656268,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"01:31","end":"02:31","startHours":25.51224490656268,"endHours":26.51224490656268,"planetary_lord":"Venus"},{"name":"Hora 20","start":"02:31","end":"03:31","startHours":26.51224490656268,"endHours":27.51224490656268,"planetary_lord":"Sun"},{"name":"Hora 21","start":"03:31","end":"04:31","startHours":27.51224490656268,"endHours":28.51224490656268,"planetary_lord":"Mars"},{"name":"Hora 22","start":"04:31","end":"05:31","startHours":28.51224490656268,"endHours":29.51224490656268,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"05:31","end":"06:31","startHours":29.51224490656268,"endHours":30.51224490656268,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"06:31","end":"07:31","startHours":30.51224490656268,"endHours":31.51224490656268,"planetary_lord":"Moon"}],"taraBala":{"favorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Uttara Phalgunī","Hasta","Citrā","Svātī","Viśākhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Mithuna","Siṃha","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Kanyā","Vṛścika","Dhanu","Mīna"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"West","rahuVasa":"North-West","anandadiYoga":{"name":"Sushira","quality":"Auspicious"},"tropicalRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-23.342542570154922,"eotMinutes":3.253368877108411,"ayanamsa":23.601}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Pauṣa","lunar_month_amanta":"Mārgaśīrṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Kṛṣṇa Saptamī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[],"todays_walk":{"walk":{"id":"guru-walk","name":"Bṛhaspati Walk","name_sanskrit":"गुरु यात्रा","type":"graha","description":"Wisdom transmission + BG 4.34.","step_count":8,"url":"/walk/guru-walk"},"reason":"Guruvāra (Thursday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"beijing"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga December 17, 1981 CE · Beijing, Beijing · Vidhyamitra","description":"December 17, 1981 CE for Beijing, Beijing: Kṛṣṇa Saptamī, sūryodaya 07:31, sūryāsta 16:52.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/beijing/1981-12-17","hreflang_alternates":{"en":"https://vidhyamitra.com/city/beijing/1981-12-17","sa":"https://sa.vidhyamitra.com/city/beijing/1981-12-17","hi":"https://hi.vidhyamitra.com/city/beijing/1981-12-17","x-default":"https://vidhyamitra.com/city/beijing/1981-12-17"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T01:49:23.876Z","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":"2026-06-02T01:49:23.876Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T01:49:23.876Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}