{"id":"vidhyamitra:city-day:rishikesh:1978-12-10:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1978-12-10","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1978-12-10","date_display":"December 10, 1978 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":1978,"month":12,"day":10,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2443852.770833,"kali_year":5080,"ahargana":1855387.2708,"sun":{"sidereal_longitude":233.6813,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":0.2971,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":126.6159,"elapsed_within_tithi_degrees":6.6159},"nakshatra":{"number":1,"name":"Aśvinī","pada":1,"moon_longitude":0.2971,"elapsed_within_degrees":0.2971},"yoga":{"number":18,"name":"Varīyān","sum_longitude":233.9784},"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":1978,"month":12,"day":10,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2443852.770833,"ahargana":1855387.2708,"kali_year":5080,"ayanamsa_lahiri":23.5588,"grahas":{"sun":{"sidereal_longitude":234.06011,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":1.5971099999999865,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":1},"retrograde":false,"latitude":-2.0862},"mars":{"sidereal_longitude":244.69260999999995,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":224.90400999999997,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":4},"retrograde":true},"jupiter":{"sidereal_longitude":104.85521,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":true},"venus":{"sidereal_longitude":196.51111000000003,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":140.04910999999998,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":152.6536,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":332.6536,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","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":1978,"month":12,"day":10,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2443852.770833,"kali_year":5080,"ahargana":1855387.2708,"sun":{"sidereal_longitude":233.6813,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":0.2971,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":126.6159,"elapsed_within_tithi_degrees":6.6159},"nakshatra":{"number":1,"name":"Aśvinī","pada":1,"moon_longitude":0.2971,"elapsed_within_degrees":0.2971},"yoga":{"number":18,"name":"Varīyān","sum_longitude":233.9784},"karana":{"half_tithi_index":21,"name":"Viṣṭi"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.086,"elongation":126.616},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.086,"opposition_distance":53.384}},"eclipse_window_40days":[]},"city":{"slug":"rishikesh","name":"Ṛṣikeśa","lat":30.0869,"lon":78.2676,"tz_offset_hours":5.5,"state":"Uttarakhand","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"rishikesh","name":"Ṛṣikeśa","lat":30.0869,"lon":78.2676,"tz_offset_hours":5.5,"state":"Uttarakhand","country":"IN","tier":"tirtha"},"sunriseLocal":"07:03","sunsetLocal":"17:18","solarNoonLocal":"12:10","dayLengthHours":10.258221992816654,"dayLengthDisplay":"10 Hours 15 Mins 30 Secs","nightLengthDisplay":"13 Hours 44 Mins 30 Secs","moonriseLocal":"14:15","moonsetLocal":"03:06","rahuKala":{"name":"Rāhu Kāla","start":"16:01","end":"17:18","startHours":16.02182638166866,"endHours":17.304104130770742,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:10","end":"13:27","startHours":12.174993134362415,"endHours":13.457270883464497,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:44","end":"16:01","startHours":14.739548632566578,"endHours":16.02182638166866,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:26","end":"09:47","startHours":9.439467269611308,"endHours":9.781408002705195,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:28","end":"07:45","startHours":7.473308054321448,"endHours":7.746860640796559,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:50","end":"12:31","startHours":11.833052401268526,"endHours":12.516933867456304,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:41","end":"06:22","startHours":5.678119205578534,"endHours":6.362000671766311,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:11","end":"07:03","startHours":6.191030305219367,"endHours":7.045882137954088,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:53","end":"14:34","startHours":13.884696799831858,"endHours":14.568578266019635,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:06","end":"17:30","startHours":17.104104130770743,"endHours":17.50410413077074,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:18","end":"17:44","startHours":17.304104130770742,"endHours":17.731530047138104,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:03","end":"18:48","startHours":17.054104130770742,"endHours":18.804104130770742,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:50","end":"00:31","startHours":23.833052401268528,"endHours":24.516933867456306,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"07:03","end":"08:20","startHours":7.045882137954088,"endHours":8.32815988705617,"quality":"inauspicious"},{"name":"Chala","start":"08:20","end":"09:37","startHours":8.32815988705617,"endHours":9.610437636158252,"quality":"neutral"},{"name":"Labha","start":"09:37","end":"10:54","startHours":9.610437636158252,"endHours":10.892715385260333,"quality":"auspicious"},{"name":"Amṛta","start":"10:54","end":"12:10","startHours":10.892715385260333,"endHours":12.174993134362415,"quality":"auspicious"},{"name":"Kāla","start":"12:10","end":"13:27","startHours":12.174993134362415,"endHours":13.457270883464497,"quality":"inauspicious"},{"name":"Śubha","start":"13:27","end":"14:44","startHours":13.457270883464497,"endHours":14.739548632566578,"quality":"auspicious"},{"name":"Roga","start":"14:44","end":"16:01","startHours":14.739548632566578,"endHours":16.02182638166866,"quality":"inauspicious"},{"name":"Udveg","start":"16:01","end":"17:18","startHours":16.02182638166866,"endHours":17.304104130770742,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"17:18","end":"19:01","startHours":17.304104130770742,"endHours":19.02182638166866,"quality":"auspicious"},{"name":"Roga","start":"19:01","end":"20:44","startHours":19.02182638166866,"endHours":20.739548632566578,"quality":"inauspicious"},{"name":"Udveg","start":"20:44","end":"22:27","startHours":20.739548632566578,"endHours":22.457270883464496,"quality":"inauspicious"},{"name":"Chala","start":"22:27","end":"00:10","startHours":22.457270883464496,"endHours":24.174993134362417,"quality":"neutral"},{"name":"Labha","start":"00:10","end":"01:54","startHours":24.174993134362417,"endHours":25.89271538526033,"quality":"auspicious"},{"name":"Amṛta","start":"01:54","end":"03:37","startHours":25.89271538526033,"endHours":27.610437636158252,"quality":"auspicious"},{"name":"Kāla","start":"03:37","end":"05:20","startHours":27.610437636158252,"endHours":29.32815988705617,"quality":"inauspicious"},{"name":"Śubha","start":"05:20","end":"07:03","startHours":29.32815988705617,"endHours":31.045882137954088,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:03","end":"08:03","startHours":7.045882137954088,"endHours":8.045882137954088,"planetary_lord":"Sun"},{"name":"Hora 2","start":"08:03","end":"09:03","startHours":8.045882137954088,"endHours":9.045882137954088,"planetary_lord":"Mars"},{"name":"Hora 3","start":"09:03","end":"10:03","startHours":9.045882137954088,"endHours":10.045882137954088,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"10:03","end":"11:03","startHours":10.045882137954088,"endHours":11.045882137954088,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"11:03","end":"12:03","startHours":11.045882137954088,"endHours":12.045882137954088,"planetary_lord":"Moon"},{"name":"Hora 6","start":"12:03","end":"13:03","startHours":12.045882137954088,"endHours":13.045882137954088,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"13:03","end":"14:03","startHours":13.045882137954088,"endHours":14.045882137954088,"planetary_lord":"Venus"},{"name":"Hora 8","start":"14:03","end":"15:03","startHours":14.045882137954088,"endHours":15.045882137954088,"planetary_lord":"Sun"},{"name":"Hora 9","start":"15:03","end":"16:03","startHours":15.045882137954088,"endHours":16.045882137954088,"planetary_lord":"Mars"},{"name":"Hora 10","start":"16:03","end":"17:03","startHours":16.045882137954088,"endHours":17.045882137954088,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"17:03","end":"18:03","startHours":17.045882137954088,"endHours":18.045882137954088,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"18:03","end":"19:03","startHours":18.045882137954088,"endHours":19.045882137954088,"planetary_lord":"Moon"},{"name":"Hora 13","start":"19:03","end":"20:03","startHours":19.045882137954088,"endHours":20.045882137954088,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"20:03","end":"21:03","startHours":20.045882137954088,"endHours":21.045882137954088,"planetary_lord":"Venus"},{"name":"Hora 15","start":"21:03","end":"22:03","startHours":21.045882137954088,"endHours":22.045882137954088,"planetary_lord":"Sun"},{"name":"Hora 16","start":"22:03","end":"23:03","startHours":22.045882137954088,"endHours":23.045882137954088,"planetary_lord":"Mars"},{"name":"Hora 17","start":"23:03","end":"00:03","startHours":23.045882137954088,"endHours":24.045882137954088,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"00:03","end":"01:03","startHours":24.045882137954088,"endHours":25.045882137954088,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"01:03","end":"02:03","startHours":25.045882137954088,"endHours":26.045882137954088,"planetary_lord":"Moon"},{"name":"Hora 20","start":"02:03","end":"03:03","startHours":26.045882137954088,"endHours":27.045882137954088,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"03:03","end":"04:03","startHours":27.045882137954088,"endHours":28.045882137954088,"planetary_lord":"Venus"},{"name":"Hora 22","start":"04:03","end":"05:03","startHours":28.045882137954088,"endHours":29.045882137954088,"planetary_lord":"Sun"},{"name":"Hora 23","start":"05:03","end":"06:03","startHours":29.045882137954088,"endHours":30.045882137954088,"planetary_lord":"Mars"},{"name":"Hora 24","start":"06:03","end":"07:03","startHours":30.045882137954088,"endHours":31.045882137954088,"planetary_lord":"Jupiter"}],"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":"West (Paścim)","chandraVasa":"East","rahuVasa":"North-East","anandadiYoga":{"name":"Ānanda","quality":"Auspicious"},"drikRitu":"Hemanta (Pre-winter) (Drik)","vedicRitu":"Śarad (Autumn)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-22.860105032044995,"eotMinutes":6.4300119382551255,"ayanamsa":23.5588}},"calendars":{"vikram_samvat":2035,"vikram_samvatsara":"Prajāpati","saka_samvat":1900,"saka_samvatsara":"Kālayukta","bengali_samvat":1385,"malayalam_era":1154,"nanakshahi_year":509,"lunar_month":"Mārgaśīrṣa","lunar_month_paksha_full":"Mārgaśīrṣa Śukla Pakṣa","solar_month":"Vṛścika (Kārttikai)","ritu":"Hemanta (Pre-winter)","display_summary":"Mārgaśīrṣa Śukla Ekādaśī · Vikram 2035 Prajāpati · Śaka 1900 Kālayukta"},"festivals":[{"id":"gita-jayanti","name":"Gītā Jayantī (= Mokṣadā Ekādaśī)","name_sanskrit":"गीता जयन्ती","tradition":"Vaishnava","associated_deity":"Krishna (Bhagavad-Gītā speaker)","significance":"Day Bhagavad Gītā was delivered at Kurukṣetra (Mahābhārata Day 1).","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Mārgaśīrṣa"},"precedence":1,"related_chart":"krishna","historical_anchor":{"event":"Bhagavad Gītā delivered at Kurukṣetra (Mahābhārata Day 1)","date_julian":"-3137-10-04","location":"Kurukṣetra"},"sources":["Bhagavad Gītā (Mahābhārata, Bhīṣma Parva)"]},{"id":"vaikuntha-ekadashi","name":"Vaikuṇṭha Ekādaśī","name_sanskrit":"वैकुण्ठ एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Most sacred Ekādaśī of the year; 'Vaikuṇṭha-dvāram udghaṭitam'.","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Mārgaśīrṣa"},"precedence":2},{"id":"mokshada-ekadashi","name":"Mokṣadā Ekādaśī (Gītā Jayantī)","name_sanskrit":"मोक्षदा एकादशी / गीता जयन्ती","tradition":"Vaishnava","associated_deity":"Krishna (Bhagavad Gītā delivery)","significance":"Day Bhagavad Gītā was delivered at Kurukṣetra.","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Mārgaśīrṣa"},"precedence":3},{"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},{"id":"vrischika-sankranti","name":"Vṛścika Saṅkrānti","name_sanskrit":"वृश्चिक सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Scorpio.","vrata":false,"detection":{"sun_rashi":"Vṛścika"},"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":[{"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":"rishikesh"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga December 10, 1978 CE · Ṛṣikeśa · Vidhyamitra","description":"December 10, 1978 CE for Ṛṣikeśa: Śukla Ekādaśī, sūryodaya 07:03, sūryāsta 17:18.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1978-12-10","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1978-12-10","sa":"https://sa.vidhyamitra.com/city/rishikesh/1978-12-10","hi":"https://hi.vidhyamitra.com/city/rishikesh/1978-12-10","x-default":"https://vidhyamitra.com/city/rishikesh/1978-12-10"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T20:38:43.373Z","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":"2026-05-18T20:38:43.373Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T20:38:43.373Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}