{"id":"vidhyamitra:city-day:rishikesh:1990-10-15:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1990-10-15","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1990-10-15","date_display":"October 15, 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":10,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2448179.770833,"kali_year":5092,"ahargana":1859714.2708,"sun":{"sidereal_longitude":176.988,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":134.563,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":27,"name":"Dvādaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvādaśī","elongation_degrees":317.575,"elapsed_within_tithi_degrees":5.575},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1,"moon_longitude":134.563,"elapsed_within_degrees":1.2297},"yoga":{"number":24,"name":"Śukla","sum_longitude":311.5511},"karana":{"half_tithi_index":52,"name":"Kaulava"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"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":10,"day":15,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2448179.770833,"ahargana":1859714.2708,"kali_year":5092,"ayanamsa_lahiri":23.7243,"grahas":{"sun":{"sidereal_longitude":177.69998699999996,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":135.865387,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":false,"latitude":-2.3277},"mars":{"sidereal_longitude":50.70498700000002,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":4},"retrograde":true},"mercury":{"sidereal_longitude":172.66688699999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":106.58718700000003,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"venus":{"sidereal_longitude":173.32368700000006,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":265.19778700000006,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":283.3884,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":103.3884,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","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":10,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2448179.770833,"kali_year":5092,"ahargana":1859714.2708,"sun":{"sidereal_longitude":176.988,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":134.563,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":27,"name":"Dvādaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvādaśī","elongation_degrees":317.575,"elapsed_within_tithi_degrees":5.575},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1,"moon_longitude":134.563,"elapsed_within_degrees":1.2297},"yoga":{"number":24,"name":"Śukla","sum_longitude":311.5511},"karana":{"half_tithi_index":52,"name":"Kaulava"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.328,"elongation":42.425},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.328,"opposition_distance":137.575}},"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":"06:18","sunsetLocal":"17:46","solarNoonLocal":"12:02","dayLengthHours":11.479410847671732,"dayLengthDisplay":"11 Hours 28 Mins 46 Secs","nightLengthDisplay":"12 Hours 31 Mins 14 Secs","moonriseLocal":"02:53","moonsetLocal":"15:36","rahuKala":{"name":"Rāhu Kāla","start":"07:44","end":"09:10","startHours":7.7297670926013,"endHours":9.164693448560266,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:36","end":"12:02","startHours":10.599619804519232,"endHours":12.0345461604782,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:28","end":"14:54","startHours":13.469472516437165,"endHours":14.904398872396133,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:58","end":"09:21","startHours":8.973369934432405,"endHours":9.356016962688129,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:46","end":"07:05","startHours":6.773149521961989,"endHours":7.079267144566569,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:39","end":"12:25","startHours":11.651899132222475,"endHours":12.417193188733926,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:46","end":"05:32","startHours":4.764252623619436,"endHours":5.529546680130885,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:20","end":"06:18","startHours":5.338223166003022,"endHours":6.294840736642334,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:57","end":"14:43","startHours":13.947781301756821,"endHours":14.71307535826827,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:34","end":"17:58","startHours":17.574251584314066,"endHours":17.974251584314064,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:46","end":"18:15","startHours":17.774251584314065,"endHours":18.25256036963372,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:31","end":"19:16","startHours":17.524251584314065,"endHours":19.274251584314065,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:39","end":"00:25","startHours":23.651899132222475,"endHours":24.417193188733926,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"06:18","end":"07:44","startHours":6.294840736642334,"endHours":7.7297670926013,"quality":"auspicious"},{"name":"Kāla","start":"07:44","end":"09:10","startHours":7.7297670926013,"endHours":9.164693448560266,"quality":"inauspicious"},{"name":"Śubha","start":"09:10","end":"10:36","startHours":9.164693448560266,"endHours":10.599619804519232,"quality":"auspicious"},{"name":"Roga","start":"10:36","end":"12:02","startHours":10.599619804519232,"endHours":12.0345461604782,"quality":"inauspicious"},{"name":"Udveg","start":"12:02","end":"13:28","startHours":12.0345461604782,"endHours":13.469472516437165,"quality":"inauspicious"},{"name":"Chala","start":"13:28","end":"14:54","startHours":13.469472516437165,"endHours":14.904398872396133,"quality":"neutral"},{"name":"Labha","start":"14:54","end":"16:20","startHours":14.904398872396133,"endHours":16.3393252283551,"quality":"auspicious"},{"name":"Amṛta","start":"16:20","end":"17:46","startHours":16.3393252283551,"endHours":17.774251584314065,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"17:46","end":"19:20","startHours":17.774251584314065,"endHours":19.339325228355097,"quality":"neutral"},{"name":"Labha","start":"19:20","end":"20:54","startHours":19.339325228355097,"endHours":20.904398872396133,"quality":"auspicious"},{"name":"Amṛta","start":"20:54","end":"22:28","startHours":20.904398872396133,"endHours":22.469472516437165,"quality":"auspicious"},{"name":"Kāla","start":"22:28","end":"00:02","startHours":22.469472516437165,"endHours":24.0345461604782,"quality":"inauspicious"},{"name":"Śubha","start":"00:02","end":"01:36","startHours":24.0345461604782,"endHours":25.599619804519232,"quality":"auspicious"},{"name":"Roga","start":"01:36","end":"03:10","startHours":25.599619804519232,"endHours":27.164693448560264,"quality":"inauspicious"},{"name":"Udveg","start":"03:10","end":"04:44","startHours":27.164693448560264,"endHours":28.7297670926013,"quality":"inauspicious"},{"name":"Chala","start":"04:44","end":"06:18","startHours":28.7297670926013,"endHours":30.294840736642335,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"06:18","end":"07:18","startHours":6.294840736642334,"endHours":7.294840736642334,"planetary_lord":"Moon"},{"name":"Hora 2","start":"07:18","end":"08:18","startHours":7.294840736642334,"endHours":8.294840736642334,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"08:18","end":"09:18","startHours":8.294840736642334,"endHours":9.294840736642334,"planetary_lord":"Venus"},{"name":"Hora 4","start":"09:18","end":"10:18","startHours":9.294840736642334,"endHours":10.294840736642334,"planetary_lord":"Sun"},{"name":"Hora 5","start":"10:18","end":"11:18","startHours":10.294840736642334,"endHours":11.294840736642334,"planetary_lord":"Mars"},{"name":"Hora 6","start":"11:18","end":"12:18","startHours":11.294840736642334,"endHours":12.294840736642334,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"12:18","end":"13:18","startHours":12.294840736642334,"endHours":13.294840736642334,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"13:18","end":"14:18","startHours":13.294840736642334,"endHours":14.294840736642334,"planetary_lord":"Moon"},{"name":"Hora 9","start":"14:18","end":"15:18","startHours":14.294840736642334,"endHours":15.294840736642334,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"15:18","end":"16:18","startHours":15.294840736642334,"endHours":16.294840736642335,"planetary_lord":"Venus"},{"name":"Hora 11","start":"16:18","end":"17:18","startHours":16.294840736642335,"endHours":17.294840736642335,"planetary_lord":"Sun"},{"name":"Hora 12","start":"17:18","end":"18:18","startHours":17.294840736642335,"endHours":18.294840736642335,"planetary_lord":"Mars"},{"name":"Hora 13","start":"18:18","end":"19:18","startHours":18.294840736642335,"endHours":19.294840736642335,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"19:18","end":"20:18","startHours":19.294840736642335,"endHours":20.294840736642335,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"20:18","end":"21:18","startHours":20.294840736642335,"endHours":21.294840736642335,"planetary_lord":"Moon"},{"name":"Hora 16","start":"21:18","end":"22:18","startHours":21.294840736642335,"endHours":22.294840736642335,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"22:18","end":"23:18","startHours":22.294840736642335,"endHours":23.294840736642335,"planetary_lord":"Venus"},{"name":"Hora 18","start":"23:18","end":"00:18","startHours":23.294840736642335,"endHours":24.294840736642335,"planetary_lord":"Sun"},{"name":"Hora 19","start":"00:18","end":"01:18","startHours":24.294840736642335,"endHours":25.294840736642335,"planetary_lord":"Mars"},{"name":"Hora 20","start":"01:18","end":"02:18","startHours":25.294840736642335,"endHours":26.294840736642335,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"02:18","end":"03:18","startHours":26.294840736642335,"endHours":27.294840736642335,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"03:18","end":"04:18","startHours":27.294840736642335,"endHours":28.294840736642335,"planetary_lord":"Moon"},{"name":"Hora 23","start":"04:18","end":"05:18","startHours":28.294840736642335,"endHours":29.294840736642335,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"05:18","end":"06:18","startHours":29.294840736642335,"endHours":30.294840736642335,"planetary_lord":"Venus"}],"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":"East (Pūrva)","chandraVasa":"West","rahuVasa":"North-East","anandadiYoga":{"name":"Lumba","quality":"Auspicious"},"drikRitu":"Śarad (Autumn) (Drik)","vedicRitu":"Varṣā (Monsoon)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-8.353511009834524,"eotMinutes":14.85683037130801,"ayanamsa":23.7243}},"calendars":{"vikram_samvat":2047,"vikram_samvatsara":"Subhānu","saka_samvat":1912,"saka_samvatsara":"Pramoda","bengali_samvat":1397,"malayalam_era":1166,"nanakshahi_year":521,"lunar_month":"Āśvina","lunar_month_paksha_full":"Āśvina Kṛṣṇa Pakṣa","solar_month":"Kanyā (Puraṭṭāsi)","ritu":"Śarad (Autumn)","display_summary":"Āśvina Kṛṣṇa Dvādaśī · Vikram 2047 Subhānu · Śaka 1912 Pramoda"},"festivals":[{"id":"kanya-sankranti","name":"Kanyā Saṅkrānti (Mahālaya begins)","name_sanskrit":"कन्या सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Virgo; Mahālaya / Pitṛ-Pakṣa solar marker.","vrata":false,"detection":{"sun_rashi":"Kanyā"},"precedence":4}],"todays_walk":{"walk":{"id":"chandra-walk","name":"Candra Walk","name_sanskrit":"चन्द्र यात्रा","type":"graha","description":"Manas-control + BG 6.5-7.","step_count":5,"url":"/walk/chandra-walk"},"reason":"Somavāra (Monday) — 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 October 15, 1990 CE · Ṛṣikeśa · Vidhyamitra","description":"October 15, 1990 CE for Ṛṣikeśa: Kṛṣṇa Dvādaśī, sūryodaya 06:18, sūryāsta 17:46.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1990-10-15","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1990-10-15","sa":"https://sa.vidhyamitra.com/city/rishikesh/1990-10-15","hi":"https://hi.vidhyamitra.com/city/rishikesh/1990-10-15","x-default":"https://vidhyamitra.com/city/rishikesh/1990-10-15"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T13:52:29.734Z","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":"2026-05-18T13:52:29.734Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T13:52:29.734Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}