{"id":"vidhyamitra:city-day:rishikesh:1990-01-21:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1990-01-21","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1990-01-21","date_display":"January 21, 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":1,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2447912.770833,"kali_year":5091,"ahargana":1859447.2708,"sun":{"sidereal_longitude":276.9758,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":209.8066,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":25,"name":"Daśamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Daśamī","elongation_degrees":292.8308,"elapsed_within_tithi_degrees":4.8308},"nakshatra":{"number":16,"name":"Viśākhā","pada":3,"moon_longitude":209.8066,"elapsed_within_degrees":9.8066},"yoga":{"number":10,"name":"Gaṇḍa","sum_longitude":126.7825},"karana":{"half_tithi_index":48,"name":"Vaṇija"},"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":1990,"month":1,"day":21,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2447912.770833,"ahargana":1859447.2708,"kali_year":5091,"ayanamsa_lahiri":23.7141,"grahas":{"sun":{"sidereal_longitude":277.01568799999995,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":210.38628800000004,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","pada":4},"retrograde":false,"latitude":-4.4965},"mars":{"sidereal_longitude":240.28938800000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":256.05458799999997,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":1},"retrograde":true},"jupiter":{"sidereal_longitude":69.195788,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":1},"retrograde":true},"venus":{"sidereal_longitude":273.605688,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":true},"saturn":{"sidereal_longitude":264.019188,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":297.5353,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":117.5353,"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":1,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2447912.770833,"kali_year":5091,"ahargana":1859447.2708,"sun":{"sidereal_longitude":276.9758,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":209.8066,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":25,"name":"Daśamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Daśamī","elongation_degrees":292.8308,"elapsed_within_tithi_degrees":4.8308},"nakshatra":{"number":16,"name":"Viśākhā","pada":3,"moon_longitude":209.8066,"elapsed_within_degrees":9.8066},"yoga":{"number":10,"name":"Gaṇḍa","sum_longitude":126.7825},"karana":{"half_tithi_index":48,"name":"Vaṇija"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.496,"elongation":67.169},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.496,"opposition_distance":112.831}},"eclipse_window_40days":[{"offset_days":6,"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":"07:13","sunsetLocal":"17:44","solarNoonLocal":"12:28","dayLengthHours":10.517042945204276,"dayLengthDisplay":"10 Hours 31 Mins 01 Secs","nightLengthDisplay":"13 Hours 28 Mins 59 Secs","moonriseLocal":"02:44","moonsetLocal":"13:19","rahuKala":{"name":"Rāhu Kāla","start":"16:25","end":"17:44","startHours":16.41364662527047,"endHours":17.728276993421005,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:28","end":"13:47","startHours":12.469755520818868,"endHours":13.784385888969402,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:06","end":"16:25","startHours":15.099016257119937,"endHours":16.41364662527047,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:40","end":"10:01","startHours":9.66521073543106,"endHours":10.015778833604536,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:39","end":"07:56","startHours":7.649444170933574,"endHours":7.929898649472355,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:07","end":"12:49","startHours":12.119187422645393,"endHours":12.820323618992344,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:49","end":"06:31","startHours":5.808961655522826,"endHours":6.510097851869777,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:20","end":"07:13","startHours":6.33481380278304,"endHours":7.211234048216729,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:13","end":"14:55","startHours":14.222596011686246,"endHours":14.923732208033197,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:32","end":"17:56","startHours":17.528276993421006,"endHours":17.928276993421004,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:44","end":"18:10","startHours":17.728276993421005,"endHours":18.16648711613785,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:29","end":"19:14","startHours":17.478276993421005,"endHours":19.228276993421005,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:07","end":"00:49","startHours":24.119187422645393,"endHours":24.820323618992344,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"07:13","end":"08:32","startHours":7.211234048216729,"endHours":8.525864416367265,"quality":"inauspicious"},{"name":"Chala","start":"08:32","end":"09:50","startHours":8.525864416367265,"endHours":9.840494784517798,"quality":"neutral"},{"name":"Labha","start":"09:50","end":"11:09","startHours":9.840494784517798,"endHours":11.155125152668333,"quality":"auspicious"},{"name":"Amṛta","start":"11:09","end":"12:28","startHours":11.155125152668333,"endHours":12.469755520818868,"quality":"auspicious"},{"name":"Kāla","start":"12:28","end":"13:47","startHours":12.469755520818868,"endHours":13.784385888969402,"quality":"inauspicious"},{"name":"Śubha","start":"13:47","end":"15:06","startHours":13.784385888969402,"endHours":15.099016257119937,"quality":"auspicious"},{"name":"Roga","start":"15:06","end":"16:25","startHours":15.099016257119937,"endHours":16.41364662527047,"quality":"inauspicious"},{"name":"Udveg","start":"16:25","end":"17:44","startHours":16.41364662527047,"endHours":17.728276993421005,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"17:44","end":"19:25","startHours":17.728276993421005,"endHours":19.41364662527047,"quality":"auspicious"},{"name":"Roga","start":"19:25","end":"21:06","startHours":19.41364662527047,"endHours":21.099016257119935,"quality":"inauspicious"},{"name":"Udveg","start":"21:06","end":"22:47","startHours":21.099016257119935,"endHours":22.784385888969403,"quality":"inauspicious"},{"name":"Chala","start":"22:47","end":"00:28","startHours":22.784385888969403,"endHours":24.469755520818868,"quality":"neutral"},{"name":"Labha","start":"00:28","end":"02:09","startHours":24.469755520818868,"endHours":26.155125152668333,"quality":"auspicious"},{"name":"Amṛta","start":"02:09","end":"03:50","startHours":26.155125152668333,"endHours":27.840494784517798,"quality":"auspicious"},{"name":"Kāla","start":"03:50","end":"05:32","startHours":27.840494784517798,"endHours":29.525864416367263,"quality":"inauspicious"},{"name":"Śubha","start":"05:32","end":"07:13","startHours":29.525864416367263,"endHours":31.21123404821673,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:13","end":"08:13","startHours":7.211234048216729,"endHours":8.21123404821673,"planetary_lord":"Sun"},{"name":"Hora 2","start":"08:13","end":"09:13","startHours":8.21123404821673,"endHours":9.21123404821673,"planetary_lord":"Mars"},{"name":"Hora 3","start":"09:13","end":"10:13","startHours":9.21123404821673,"endHours":10.21123404821673,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"10:13","end":"11:13","startHours":10.21123404821673,"endHours":11.21123404821673,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"11:13","end":"12:13","startHours":11.21123404821673,"endHours":12.21123404821673,"planetary_lord":"Moon"},{"name":"Hora 6","start":"12:13","end":"13:13","startHours":12.21123404821673,"endHours":13.21123404821673,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"13:13","end":"14:13","startHours":13.21123404821673,"endHours":14.21123404821673,"planetary_lord":"Venus"},{"name":"Hora 8","start":"14:13","end":"15:13","startHours":14.21123404821673,"endHours":15.21123404821673,"planetary_lord":"Sun"},{"name":"Hora 9","start":"15:13","end":"16:13","startHours":15.21123404821673,"endHours":16.21123404821673,"planetary_lord":"Mars"},{"name":"Hora 10","start":"16:13","end":"17:13","startHours":16.21123404821673,"endHours":17.21123404821673,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"17:13","end":"18:13","startHours":17.21123404821673,"endHours":18.21123404821673,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"18:13","end":"19:13","startHours":18.21123404821673,"endHours":19.21123404821673,"planetary_lord":"Moon"},{"name":"Hora 13","start":"19:13","end":"20:13","startHours":19.21123404821673,"endHours":20.21123404821673,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"20:13","end":"21:13","startHours":20.21123404821673,"endHours":21.21123404821673,"planetary_lord":"Venus"},{"name":"Hora 15","start":"21:13","end":"22:13","startHours":21.21123404821673,"endHours":22.21123404821673,"planetary_lord":"Sun"},{"name":"Hora 16","start":"22:13","end":"23:13","startHours":22.21123404821673,"endHours":23.21123404821673,"planetary_lord":"Mars"},{"name":"Hora 17","start":"23:13","end":"00:13","startHours":23.21123404821673,"endHours":24.21123404821673,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"00:13","end":"01:13","startHours":24.21123404821673,"endHours":25.21123404821673,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"01:13","end":"02:13","startHours":25.21123404821673,"endHours":26.21123404821673,"planetary_lord":"Moon"},{"name":"Hora 20","start":"02:13","end":"03:13","startHours":26.21123404821673,"endHours":27.21123404821673,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"03:13","end":"04:13","startHours":27.21123404821673,"endHours":28.21123404821673,"planetary_lord":"Venus"},{"name":"Hora 22","start":"04:13","end":"05:13","startHours":28.21123404821673,"endHours":29.21123404821673,"planetary_lord":"Sun"},{"name":"Hora 23","start":"05:13","end":"06:13","startHours":29.21123404821673,"endHours":30.21123404821673,"planetary_lord":"Mars"},{"name":"Hora 24","start":"06:13","end":"07:13","startHours":30.21123404821673,"endHours":31.21123404821673,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Hasta","Citrā","Svātī","Viśākhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Vṛścika","Makara"],"unfavorable_rashis":["Mithuna","Karka","Tulā","Dhanu","Kumbha","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"North-East","rahuVasa":"North-East","anandadiYoga":{"name":"Utpāta","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":-19.991793281785537,"eotMinutes":-11.255731249132124,"ayanamsa":23.7141}},"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 Kṛṣṇa Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Kṛṣṇa Daśamī · 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":"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":"-0562-04-11","event":"Bhagavān Buddha's birth at Lumbinī","chart_id":"buddha","shared_marker":"same Viśākhā","url":"/day/-0562-04-11","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 January 21, 1990 CE · Ṛṣikeśa · Vidhyamitra","description":"January 21, 1990 CE for Ṛṣikeśa: Kṛṣṇa Daśamī, sūryodaya 07:13, sūryāsta 17:44.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1990-01-21","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1990-01-21","sa":"https://sa.vidhyamitra.com/city/rishikesh/1990-01-21","hi":"https://hi.vidhyamitra.com/city/rishikesh/1990-01-21","x-default":"https://vidhyamitra.com/city/rishikesh/1990-01-21"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T09:14:10.697Z","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":"2026-05-18T09:14:10.697Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T09:14:10.697Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}