{"id":"vidhyamitra:city-day:rishikesh:1990-12-25:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1990-12-25","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1990-12-25","date_display":"December 25, 1990 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":1990,"month":12,"day":25,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2448250.770833,"kali_year":5092,"ahargana":1859785.2708,"sun":{"sidereal_longitude":248.9688,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":341.6146,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":92.6459,"elapsed_within_tithi_degrees":8.6459},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":3,"moon_longitude":341.6146,"elapsed_within_degrees":8.2813},"yoga":{"number":18,"name":"Varīyān","sum_longitude":230.5834},"karana":{"half_tithi_index":15,"name":"Bava"},"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":1990,"month":12,"day":25,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2448250.770833,"ahargana":1859785.2708,"kali_year":5092,"ayanamsa_lahiri":23.727,"grahas":{"sun":{"sidereal_longitude":249.2460739999999,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false},"moon":{"sidereal_longitude":338.066074,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2},"retrograde":false,"latitude":3.9719},"mars":{"sidereal_longitude":34.580174,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":247.61097399999994,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":true},"jupiter":{"sidereal_longitude":108.76847400000003,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":1},"retrograde":true},"venus":{"sidereal_longitude":262.417774,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":270.964874,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":279.6264,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":99.6264,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":2},"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":1990,"month":12,"day":25,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2448250.770833,"kali_year":5092,"ahargana":1859785.2708,"sun":{"sidereal_longitude":248.9688,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":341.6146,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":92.6459,"elapsed_within_tithi_degrees":8.6459},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":3,"moon_longitude":341.6146,"elapsed_within_degrees":8.2813},"yoga":{"number":18,"name":"Varīyān","sum_longitude":230.5834},"karana":{"half_tithi_index":15,"name":"Bava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.972,"elongation":92.646},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.972,"opposition_distance":87.354}},"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":"07:11","sunsetLocal":"17:24","solarNoonLocal":"12:17","dayLengthHours":10.207846248877189,"dayLengthDisplay":"10 Hours 12 Mins 28 Secs","nightLengthDisplay":"13 Hours 47 Mins 32 Secs","moonriseLocal":"12:08","moonsetLocal":"00:17","rahuKala":{"name":"Rāhu Kāla","start":"14:51","end":"16:07","startHours":14.842345844587122,"endHours":16.11832662569677,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:44","end":"11:01","startHours":9.738422720148527,"endHours":11.014403501258176,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:17","end":"13:34","startHours":12.290384282367825,"endHours":13.566365063477473,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:34","end":"09:55","startHours":9.568291949333908,"endHours":9.908553490963147,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:37","end":"07:53","startHours":7.611788084965779,"endHours":7.883997318269171,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:57","end":"12:38","startHours":11.950122740738585,"endHours":12.630645823997064,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:50","end":"06:30","startHours":5.825414991412271,"endHours":6.50593807467075,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:20","end":"07:11","startHours":6.3358073038561304,"endHours":7.186461157929229,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:00","end":"14:40","startHours":13.991691990514022,"endHours":14.672215073772502,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:12","end":"17:36","startHours":17.19430740680642,"endHours":17.59430740680642,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:24","end":"17:49","startHours":17.39430740680642,"endHours":17.81963433384297,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:09","end":"18:54","startHours":17.14430740680642,"endHours":18.89430740680642,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:57","end":"00:38","startHours":23.950122740738585,"endHours":24.630645823997064,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"07:11","end":"08:28","startHours":7.186461157929229,"endHours":8.462441939038879,"quality":"inauspicious"},{"name":"Udveg","start":"08:28","end":"09:44","startHours":8.462441939038879,"endHours":9.738422720148527,"quality":"inauspicious"},{"name":"Chala","start":"09:44","end":"11:01","startHours":9.738422720148527,"endHours":11.014403501258176,"quality":"neutral"},{"name":"Labha","start":"11:01","end":"12:17","startHours":11.014403501258176,"endHours":12.290384282367825,"quality":"auspicious"},{"name":"Amṛta","start":"12:17","end":"13:34","startHours":12.290384282367825,"endHours":13.566365063477473,"quality":"auspicious"},{"name":"Kāla","start":"13:34","end":"14:51","startHours":13.566365063477473,"endHours":14.842345844587122,"quality":"inauspicious"},{"name":"Śubha","start":"14:51","end":"16:07","startHours":14.842345844587122,"endHours":16.11832662569677,"quality":"auspicious"},{"name":"Roga","start":"16:07","end":"17:24","startHours":16.11832662569677,"endHours":17.39430740680642,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"17:24","end":"19:07","startHours":17.39430740680642,"endHours":19.11832662569677,"quality":"inauspicious"},{"name":"Śubha","start":"19:07","end":"20:51","startHours":19.11832662569677,"endHours":20.842345844587122,"quality":"auspicious"},{"name":"Roga","start":"20:51","end":"22:34","startHours":20.842345844587122,"endHours":22.566365063477473,"quality":"inauspicious"},{"name":"Udveg","start":"22:34","end":"00:17","startHours":22.566365063477473,"endHours":24.290384282367825,"quality":"inauspicious"},{"name":"Chala","start":"00:17","end":"02:01","startHours":24.290384282367825,"endHours":26.014403501258176,"quality":"neutral"},{"name":"Labha","start":"02:01","end":"03:44","startHours":26.014403501258176,"endHours":27.738422720148527,"quality":"auspicious"},{"name":"Amṛta","start":"03:44","end":"05:28","startHours":27.738422720148527,"endHours":29.46244193903888,"quality":"auspicious"},{"name":"Kāla","start":"05:28","end":"07:11","startHours":29.46244193903888,"endHours":31.18646115792923,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:11","end":"08:11","startHours":7.186461157929229,"endHours":8.18646115792923,"planetary_lord":"Mars"},{"name":"Hora 2","start":"08:11","end":"09:11","startHours":8.18646115792923,"endHours":9.18646115792923,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"09:11","end":"10:11","startHours":9.18646115792923,"endHours":10.18646115792923,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"10:11","end":"11:11","startHours":10.18646115792923,"endHours":11.18646115792923,"planetary_lord":"Moon"},{"name":"Hora 5","start":"11:11","end":"12:11","startHours":11.18646115792923,"endHours":12.18646115792923,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"12:11","end":"13:11","startHours":12.18646115792923,"endHours":13.18646115792923,"planetary_lord":"Venus"},{"name":"Hora 7","start":"13:11","end":"14:11","startHours":13.18646115792923,"endHours":14.18646115792923,"planetary_lord":"Sun"},{"name":"Hora 8","start":"14:11","end":"15:11","startHours":14.18646115792923,"endHours":15.18646115792923,"planetary_lord":"Mars"},{"name":"Hora 9","start":"15:11","end":"16:11","startHours":15.18646115792923,"endHours":16.18646115792923,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"16:11","end":"17:11","startHours":16.18646115792923,"endHours":17.18646115792923,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"17:11","end":"18:11","startHours":17.18646115792923,"endHours":18.18646115792923,"planetary_lord":"Moon"},{"name":"Hora 12","start":"18:11","end":"19:11","startHours":18.18646115792923,"endHours":19.18646115792923,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"19:11","end":"20:11","startHours":19.18646115792923,"endHours":20.18646115792923,"planetary_lord":"Venus"},{"name":"Hora 14","start":"20:11","end":"21:11","startHours":20.18646115792923,"endHours":21.18646115792923,"planetary_lord":"Sun"},{"name":"Hora 15","start":"21:11","end":"22:11","startHours":21.18646115792923,"endHours":22.18646115792923,"planetary_lord":"Mars"},{"name":"Hora 16","start":"22:11","end":"23:11","startHours":22.18646115792923,"endHours":23.18646115792923,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"23:11","end":"00:11","startHours":23.18646115792923,"endHours":24.18646115792923,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"00:11","end":"01:11","startHours":24.18646115792923,"endHours":25.18646115792923,"planetary_lord":"Moon"},{"name":"Hora 19","start":"01:11","end":"02:11","startHours":25.18646115792923,"endHours":26.18646115792923,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"02:11","end":"03:11","startHours":26.18646115792923,"endHours":27.18646115792923,"planetary_lord":"Venus"},{"name":"Hora 21","start":"03:11","end":"04:11","startHours":27.18646115792923,"endHours":28.18646115792923,"planetary_lord":"Sun"},{"name":"Hora 22","start":"04:11","end":"05:11","startHours":28.18646115792923,"endHours":29.18646115792923,"planetary_lord":"Mars"},{"name":"Hora 23","start":"05:11","end":"06:11","startHours":29.18646115792923,"endHours":30.18646115792923,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"06:11","end":"07:11","startHours":30.18646115792923,"endHours":31.18646115792923,"planetary_lord":"Saturn"}],"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":["Vṛṣabha","Siṃha","Kanyā","Dhanu","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Karka","Tulā","Vṛścika","Kumbha"]},"dishaShool":"North (Uttara)","chandraVasa":"South-West","rahuVasa":"North","anandadiYoga":{"name":"Dhvānkṣa","quality":"Inauspicious"},"drikRitu":"Hemanta (Pre-winter) (Drik)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-23.403073511519967,"eotMinutes":-0.4934569420694592,"ayanamsa":23.727}},"calendars":{"vikram_samvat":2047,"vikram_samvatsara":"Subhānu","saka_samvat":1912,"saka_samvatsara":"Pramoda","bengali_samvat":1397,"malayalam_era":1166,"nanakshahi_year":521,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Śukla Pakṣa","solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Śukla Aṣṭamī · Vikram 2047 Subhānu · Śaka 1912 Pramoda"},"festivals":[{"id":"lohri","name":"Lohri","name_sanskrit":"लोहड़ी","tradition":"Regional","significance":"Punjab harvest festival; eve of Makara Saṅkrānti. (Approximated as 13/14 January annually; correct via Sun in Dhanu/Makara cusp.)","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":4},{"id":"dhanu-sankranti","name":"Dhanu Saṅkrānti","name_sanskrit":"धनु सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Sagittarius; Dhanu-māsa (Khara-māsa).","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":5}],"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":"-3137-12-25","event":"Bhīṣma's Mahaprasthan","chart_id":"bhishma","shared_marker":"same Śukla Aṣṭamī","url":"/day/-3137-12-25","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 25, 1990 CE · Ṛṣikeśa · Vidhyamitra","description":"December 25, 1990 CE for Ṛṣikeśa: Śukla Aṣṭamī, sūryodaya 07:11, sūryāsta 17:24.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1990-12-25","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1990-12-25","sa":"https://sa.vidhyamitra.com/city/rishikesh/1990-12-25","hi":"https://hi.vidhyamitra.com/city/rishikesh/1990-12-25","x-default":"https://vidhyamitra.com/city/rishikesh/1990-12-25"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-17T17:57:56.254Z","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":"2026-05-17T17:57:56.254Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-17T17:57:56.254Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}