{"id":"vidhyamitra:city-day:rishikesh:2131-02-15:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/2131-02-15","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2131-02-15","date_display":"February 15, 2131 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":2131,"month":2,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2499436.770833,"kali_year":5232,"ahargana":1910971.2708,"sun":{"sidereal_longitude":299.9729,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":154.7579,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":18,"name":"Tṛtīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Tṛtīyā","elongation_degrees":214.785,"elapsed_within_tithi_degrees":10.785},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3,"moon_longitude":154.7579,"elapsed_within_degrees":8.0912},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":94.7308},"karana":{"half_tithi_index":35,"name":"Viṣṭi"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"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":2131,"month":2,"day":15,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2499436.770833,"ahargana":1910971.2708,"kali_year":5232,"ayanamsa_lahiri":25.6847,"grahas":{"sun":{"sidereal_longitude":300.19089299999996,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":151.96009300000003,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false,"latitude":4.1481},"mars":{"sidereal_longitude":246.48539300000004,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":312.1359930000001,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":20.426893000000007,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3},"retrograde":false},"venus":{"sidereal_longitude":261.14429300000006,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":198.77399300000002,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":87.5458,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":267.5458,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"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":2131,"month":2,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2499436.770833,"kali_year":5232,"ahargana":1910971.2708,"sun":{"sidereal_longitude":299.9729,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":154.7579,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":18,"name":"Tṛtīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Tṛtīyā","elongation_degrees":214.785,"elapsed_within_tithi_degrees":10.785},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3,"moon_longitude":154.7579,"elapsed_within_degrees":8.0912},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":94.7308},"karana":{"half_tithi_index":35,"name":"Viṣṭi"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.148,"elongation":145.215},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.148,"opposition_distance":34.785}},"eclipse_window_40days":[{"offset_days":-17,"type":"solar","occurs":true,"moon_latitude":-0.919,"elongation":2.391}]},"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":"06:58","sunsetLocal":"18:05","solarNoonLocal":"12:32","dayLengthHours":11.11659787958736,"dayLengthDisplay":"11 Hours 07 Mins 00 Secs","nightLengthDisplay":"12 Hours 53 Mins 00 Secs","moonriseLocal":"20:34","moonsetLocal":"08:43","rahuKala":{"name":"Rāhu Kāla","start":"13:55","end":"15:18","startHours":13.914585752405085,"endHours":15.304160487353506,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"06:58","end":"08:21","startHours":6.966712077662986,"endHours":8.356286812611405,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"09:45","end":"11:08","startHours":9.745861547559826,"endHours":11.135436282508245,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:34","end":"09:56","startHours":9.56058491623337,"endHours":9.931138178886282,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:26","end":"07:44","startHours":7.429903655979126,"endHours":7.726346266101455,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:09","end":"12:54","startHours":12.154457754803754,"endHours":12.895564280109578,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:29","end":"06:14","startHours":5.484499027051338,"endHours":6.225605552357162,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:02","end":"06:58","startHours":6.040328921030706,"endHours":6.966712077662986,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:23","end":"15:07","startHours":14.377777330721226,"endHours":15.11888385602705,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:53","end":"18:17","startHours":17.883309957250347,"endHours":18.283309957250346,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:05","end":"18:33","startHours":18.083309957250346,"endHours":18.546501535566485,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:50","end":"19:35","startHours":17.833309957250346,"endHours":19.583309957250346,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:09","end":"00:54","startHours":24.154457754803754,"endHours":24.89556428010958,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"06:58","end":"08:21","startHours":6.966712077662986,"endHours":8.356286812611405,"quality":"auspicious"},{"name":"Roga","start":"08:21","end":"09:45","startHours":8.356286812611405,"endHours":9.745861547559826,"quality":"inauspicious"},{"name":"Udveg","start":"09:45","end":"11:08","startHours":9.745861547559826,"endHours":11.135436282508245,"quality":"inauspicious"},{"name":"Chala","start":"11:08","end":"12:32","startHours":11.135436282508245,"endHours":12.525011017456666,"quality":"neutral"},{"name":"Labha","start":"12:32","end":"13:55","startHours":12.525011017456666,"endHours":13.914585752405085,"quality":"auspicious"},{"name":"Amṛta","start":"13:55","end":"15:18","startHours":13.914585752405085,"endHours":15.304160487353506,"quality":"auspicious"},{"name":"Kāla","start":"15:18","end":"16:42","startHours":15.304160487353506,"endHours":16.693735222301925,"quality":"inauspicious"},{"name":"Śubha","start":"16:42","end":"18:05","startHours":16.693735222301925,"endHours":18.083309957250346,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"18:05","end":"19:42","startHours":18.083309957250346,"endHours":19.693735222301925,"quality":"auspicious"},{"name":"Kāla","start":"19:42","end":"21:18","startHours":19.693735222301925,"endHours":21.304160487353506,"quality":"inauspicious"},{"name":"Śubha","start":"21:18","end":"22:55","startHours":21.304160487353506,"endHours":22.914585752405088,"quality":"auspicious"},{"name":"Roga","start":"22:55","end":"00:32","startHours":22.914585752405088,"endHours":24.525011017456666,"quality":"inauspicious"},{"name":"Udveg","start":"00:32","end":"02:08","startHours":24.525011017456666,"endHours":26.135436282508245,"quality":"inauspicious"},{"name":"Chala","start":"02:08","end":"03:45","startHours":26.135436282508245,"endHours":27.745861547559826,"quality":"neutral"},{"name":"Labha","start":"03:45","end":"05:21","startHours":27.745861547559826,"endHours":29.35628681261141,"quality":"auspicious"},{"name":"Amṛta","start":"05:21","end":"06:58","startHours":29.35628681261141,"endHours":30.966712077662987,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:58","end":"07:58","startHours":6.966712077662986,"endHours":7.966712077662986,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"07:58","end":"08:58","startHours":7.966712077662986,"endHours":8.966712077662987,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"08:58","end":"09:58","startHours":8.966712077662987,"endHours":9.966712077662987,"planetary_lord":"Moon"},{"name":"Hora 4","start":"09:58","end":"10:58","startHours":9.966712077662987,"endHours":10.966712077662987,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"10:58","end":"11:58","startHours":10.966712077662987,"endHours":11.966712077662987,"planetary_lord":"Venus"},{"name":"Hora 6","start":"11:58","end":"12:58","startHours":11.966712077662987,"endHours":12.966712077662987,"planetary_lord":"Sun"},{"name":"Hora 7","start":"12:58","end":"13:58","startHours":12.966712077662987,"endHours":13.966712077662987,"planetary_lord":"Mars"},{"name":"Hora 8","start":"13:58","end":"14:58","startHours":13.966712077662987,"endHours":14.966712077662987,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"14:58","end":"15:58","startHours":14.966712077662987,"endHours":15.966712077662987,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"15:58","end":"16:58","startHours":15.966712077662987,"endHours":16.966712077662987,"planetary_lord":"Moon"},{"name":"Hora 11","start":"16:58","end":"17:58","startHours":16.966712077662987,"endHours":17.966712077662987,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"17:58","end":"18:58","startHours":17.966712077662987,"endHours":18.966712077662987,"planetary_lord":"Venus"},{"name":"Hora 13","start":"18:58","end":"19:58","startHours":18.966712077662987,"endHours":19.966712077662987,"planetary_lord":"Sun"},{"name":"Hora 14","start":"19:58","end":"20:58","startHours":19.966712077662987,"endHours":20.966712077662987,"planetary_lord":"Mars"},{"name":"Hora 15","start":"20:58","end":"21:58","startHours":20.966712077662987,"endHours":21.966712077662987,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"21:58","end":"22:58","startHours":21.966712077662987,"endHours":22.966712077662987,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"22:58","end":"23:58","startHours":22.966712077662987,"endHours":23.966712077662987,"planetary_lord":"Moon"},{"name":"Hora 18","start":"23:58","end":"00:58","startHours":23.966712077662987,"endHours":24.966712077662987,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"00:58","end":"01:58","startHours":24.966712077662987,"endHours":25.966712077662987,"planetary_lord":"Venus"},{"name":"Hora 20","start":"01:58","end":"02:58","startHours":25.966712077662987,"endHours":26.966712077662987,"planetary_lord":"Sun"},{"name":"Hora 21","start":"02:58","end":"03:58","startHours":26.966712077662987,"endHours":27.966712077662987,"planetary_lord":"Mars"},{"name":"Hora 22","start":"03:58","end":"04:58","startHours":27.966712077662987,"endHours":28.966712077662987,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"04:58","end":"05:58","startHours":28.966712077662987,"endHours":29.966712077662987,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"05:58","end":"06:58","startHours":29.966712077662987,"endHours":30.966712077662987,"planetary_lord":"Moon"}],"taraBala":{"favorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Hasta","Citrā","Svātī","Viśākhā","Anurādhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Mithuna","Karka","Kanyā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Tulā","Dhanu","Makara"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"North-West","rahuVasa":"North-West","anandadiYoga":{"name":"Dhātṛ","quality":"Auspicious"},"drikRitu":"Śiśira (Winter)","vedicRitu":"Śiśira (Winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-12.892622526471609,"eotMinutes":-14.571061047399978,"ayanamsa":25.6847}},"calendars":{"vikram_samvat":2188,"vikram_samvatsara":"Krodhi","saka_samvat":2053,"saka_samvatsara":"Khara","bengali_samvat":1538,"malayalam_era":1307,"nanakshahi_year":662,"lunar_month":"Phālguna","lunar_month_paksha_full":"Phālguna Kṛṣṇa Pakṣa","solar_month":"Kumbha (Māsi)","ritu":"Śiśira (Winter)","display_summary":"Phālguna Kṛṣṇa Tṛtīyā · Vikram 2188 Krodhi · Śaka 2053 Khara"},"festivals":[{"id":"kumbha-sankranti","name":"Kumbha Saṅkrānti","name_sanskrit":"कुम्भ सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Aquarius; Kumbha-māsa begins.","vrata":false,"detection":{"sun_rashi":"Kumbha"},"precedence":5}],"todays_walk":{"walk":{"id":"guru-walk","name":"Bṛhaspati Walk","name_sanskrit":"गुरु यात्रा","type":"graha","description":"Wisdom transmission + BG 4.34.","step_count":8,"url":"/walk/guru-walk"},"reason":"Guruvāra (Thursday) — 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 15, 2131 CE · Ṛṣikeśa · Vidhyamitra","description":"February 15, 2131 CE for Ṛṣikeśa: Kṛṣṇa Tṛtīyā, sūryodaya 06:58, sūryāsta 18:05.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/2131-02-15","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/2131-02-15","sa":"https://sa.vidhyamitra.com/city/rishikesh/2131-02-15","hi":"https://hi.vidhyamitra.com/city/rishikesh/2131-02-15","x-default":"https://vidhyamitra.com/city/rishikesh/2131-02-15"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-24T09:51:21.851Z","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":"2026-05-24T09:51:21.851Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-24T09:51:21.851Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}