{"id":"vidhyamitra:city-day:rishikesh:1990-02-06:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1990-02-06","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1990-02-06","date_display":"February 6, 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":2,"day":6,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2447928.770833,"kali_year":5091,"ahargana":1859463.2708,"sun":{"sidereal_longitude":293.3403,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":66.8103,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":133.4701,"elapsed_within_tithi_degrees":1.4701},"nakshatra":{"number":6,"name":"Ārdrā","pada":1,"moon_longitude":66.8103,"elapsed_within_degrees":0.1437},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":0.1506},"karana":{"half_tithi_index":22,"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":2,"day":6,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2447928.770833,"ahargana":1859463.2708,"kali_year":5091,"ayanamsa_lahiri":23.7147,"grahas":{"sun":{"sidereal_longitude":293.26807699999995,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4},"retrograde":false},"moon":{"sidereal_longitude":66.023077,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":4},"retrograde":false,"latitude":3.4395},"mars":{"sidereal_longitude":251.80597699999998,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":268.72107700000004,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":67.83047699999997,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":1},"retrograde":true},"venus":{"sidereal_longitude":267.28077699999994,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":265.83657700000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":296.6875,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":116.6875,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","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":1990,"month":2,"day":6,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2447928.770833,"kali_year":5091,"ahargana":1859463.2708,"sun":{"sidereal_longitude":293.3403,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":66.8103,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":133.4701,"elapsed_within_tithi_degrees":1.4701},"nakshatra":{"number":6,"name":"Ārdrā","pada":1,"moon_longitude":66.8103,"elapsed_within_degrees":0.1437},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":0.1506},"karana":{"half_tithi_index":22,"name":"Bava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.44,"elongation":133.47},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.44,"opposition_distance":46.53}},"eclipse_window_40days":[{"offset_days":-10,"type":"solar","occurs":true,"moon_latitude":-0.956,"elongation":1.82}]},"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":"07:05","sunsetLocal":"17:58","solarNoonLocal":"12:31","dayLengthHours":10.881578627500154,"dayLengthDisplay":"10 Hours 52 Mins 54 Secs","nightLengthDisplay":"13 Hours 07 Mins 06 Secs","moonriseLocal":"14:21","moonsetLocal":"04:23","rahuKala":{"name":"Rāhu Kāla","start":"15:14","end":"16:36","startHours":15.240810208832992,"endHours":16.60100753727051,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:48","end":"11:10","startHours":9.800020895082914,"endHours":11.160218223520435,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:31","end":"13:53","startHours":12.520415551957953,"endHours":13.880612880395471,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:37","end":"09:59","startHours":9.618661251291245,"endHours":9.981380538874584,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:32","end":"07:49","startHours":7.533025347687049,"endHours":7.82320077775372,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:09","end":"12:53","startHours":12.157696264374614,"endHours":12.883134839541292,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:38","end":"06:21","startHours":5.628749087874522,"endHours":6.354187663041198,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:10","end":"07:05","startHours":6.17282801924953,"endHours":7.079626238207876,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:20","end":"15:04","startHours":14.334011989874647,"endHours":15.059450565041324,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:46","end":"18:10","startHours":17.76120486570803,"endHours":18.16120486570803,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:58","end":"18:25","startHours":17.96120486570803,"endHours":18.4146039751872,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:43","end":"19:28","startHours":17.71120486570803,"endHours":19.46120486570803,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:09","end":"00:53","startHours":24.157696264374614,"endHours":24.88313483954129,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"07:05","end":"08:26","startHours":7.079626238207876,"endHours":8.439823566645394,"quality":"inauspicious"},{"name":"Udveg","start":"08:26","end":"09:48","startHours":8.439823566645394,"endHours":9.800020895082914,"quality":"inauspicious"},{"name":"Chala","start":"09:48","end":"11:10","startHours":9.800020895082914,"endHours":11.160218223520435,"quality":"neutral"},{"name":"Labha","start":"11:10","end":"12:31","startHours":11.160218223520435,"endHours":12.520415551957953,"quality":"auspicious"},{"name":"Amṛta","start":"12:31","end":"13:53","startHours":12.520415551957953,"endHours":13.880612880395471,"quality":"auspicious"},{"name":"Kāla","start":"13:53","end":"15:14","startHours":13.880612880395471,"endHours":15.240810208832992,"quality":"inauspicious"},{"name":"Śubha","start":"15:14","end":"16:36","startHours":15.240810208832992,"endHours":16.60100753727051,"quality":"auspicious"},{"name":"Roga","start":"16:36","end":"17:58","startHours":16.60100753727051,"endHours":17.96120486570803,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"17:58","end":"19:36","startHours":17.96120486570803,"endHours":19.60100753727051,"quality":"inauspicious"},{"name":"Śubha","start":"19:36","end":"21:14","startHours":19.60100753727051,"endHours":21.24081020883299,"quality":"auspicious"},{"name":"Roga","start":"21:14","end":"22:53","startHours":21.24081020883299,"endHours":22.88061288039547,"quality":"inauspicious"},{"name":"Udveg","start":"22:53","end":"00:31","startHours":22.88061288039547,"endHours":24.520415551957953,"quality":"inauspicious"},{"name":"Chala","start":"00:31","end":"02:10","startHours":24.520415551957953,"endHours":26.160218223520435,"quality":"neutral"},{"name":"Labha","start":"02:10","end":"03:48","startHours":26.160218223520435,"endHours":27.800020895082916,"quality":"auspicious"},{"name":"Amṛta","start":"03:48","end":"05:26","startHours":27.800020895082916,"endHours":29.439823566645394,"quality":"auspicious"},{"name":"Kāla","start":"05:26","end":"07:05","startHours":29.439823566645394,"endHours":31.079626238207876,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:05","end":"08:05","startHours":7.079626238207876,"endHours":8.079626238207876,"planetary_lord":"Mars"},{"name":"Hora 2","start":"08:05","end":"09:05","startHours":8.079626238207876,"endHours":9.079626238207876,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"09:05","end":"10:05","startHours":9.079626238207876,"endHours":10.079626238207876,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"10:05","end":"11:05","startHours":10.079626238207876,"endHours":11.079626238207876,"planetary_lord":"Moon"},{"name":"Hora 5","start":"11:05","end":"12:05","startHours":11.079626238207876,"endHours":12.079626238207876,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"12:05","end":"13:05","startHours":12.079626238207876,"endHours":13.079626238207876,"planetary_lord":"Venus"},{"name":"Hora 7","start":"13:05","end":"14:05","startHours":13.079626238207876,"endHours":14.079626238207876,"planetary_lord":"Sun"},{"name":"Hora 8","start":"14:05","end":"15:05","startHours":14.079626238207876,"endHours":15.079626238207876,"planetary_lord":"Mars"},{"name":"Hora 9","start":"15:05","end":"16:05","startHours":15.079626238207876,"endHours":16.079626238207876,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"16:05","end":"17:05","startHours":16.079626238207876,"endHours":17.079626238207876,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"17:05","end":"18:05","startHours":17.079626238207876,"endHours":18.079626238207876,"planetary_lord":"Moon"},{"name":"Hora 12","start":"18:05","end":"19:05","startHours":18.079626238207876,"endHours":19.079626238207876,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"19:05","end":"20:05","startHours":19.079626238207876,"endHours":20.079626238207876,"planetary_lord":"Venus"},{"name":"Hora 14","start":"20:05","end":"21:05","startHours":20.079626238207876,"endHours":21.079626238207876,"planetary_lord":"Sun"},{"name":"Hora 15","start":"21:05","end":"22:05","startHours":21.079626238207876,"endHours":22.079626238207876,"planetary_lord":"Mars"},{"name":"Hora 16","start":"22:05","end":"23:05","startHours":22.079626238207876,"endHours":23.079626238207876,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"23:05","end":"00:05","startHours":23.079626238207876,"endHours":24.079626238207876,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"00:05","end":"01:05","startHours":24.079626238207876,"endHours":25.079626238207876,"planetary_lord":"Moon"},{"name":"Hora 19","start":"01:05","end":"02:05","startHours":25.079626238207876,"endHours":26.079626238207876,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"02:05","end":"03:05","startHours":26.079626238207876,"endHours":27.079626238207876,"planetary_lord":"Venus"},{"name":"Hora 21","start":"03:05","end":"04:05","startHours":27.079626238207876,"endHours":28.079626238207876,"planetary_lord":"Sun"},{"name":"Hora 22","start":"04:05","end":"05:05","startHours":28.079626238207876,"endHours":29.079626238207876,"planetary_lord":"Mars"},{"name":"Hora 23","start":"05:05","end":"06:05","startHours":29.079626238207876,"endHours":30.079626238207876,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"06:05","end":"07:05","startHours":30.079626238207876,"endHours":31.079626238207876,"planetary_lord":"Saturn"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Punarvasu","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Uttara Phalgunī","Hasta","Citrā","Svātī","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Mithuna","Siṃha","Vṛścika","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Karka","Kanyā","Tulā","Makara","Kumbha"]},"dishaShool":"North (Uttara)","chandraVasa":"South","rahuVasa":"North","anandadiYoga":{"name":"Padma","quality":"Auspicious"},"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":-15.744038848666474,"eotMinutes":-14.295333117477217,"ayanamsa":23.7147}},"calendars":{"vikram_samvat":2047,"vikram_samvatsara":"Subhānu","saka_samvat":1912,"saka_samvatsara":"Pramoda","bengali_samvat":1397,"malayalam_era":1166,"nanakshahi_year":521,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Śukla Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Śukla Dvādaśī · Vikram 2047 Subhānu · Śaka 1912 Pramoda"},"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":[]},"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 February 6, 1990 CE · Ṛṣikeśa · Vidhyamitra","description":"February 6, 1990 CE for Ṛṣikeśa: Śukla Dvādaśī, sūryodaya 07:05, sūryāsta 17:58.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1990-02-06","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1990-02-06","sa":"https://sa.vidhyamitra.com/city/rishikesh/1990-02-06","hi":"https://hi.vidhyamitra.com/city/rishikesh/1990-02-06","x-default":"https://vidhyamitra.com/city/rishikesh/1990-02-06"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-17T23:16:11.042Z","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":"2026-05-17T23:16:11.042Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-17T23:16:11.042Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}