{"id":"vidhyamitra:city-day:rishikesh:2131-02-10:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/2131-02-10","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2131-02-10","date_display":"February 10, 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":10,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2499431.770833,"kali_year":5232,"ahargana":1910966.2708,"sun":{"sidereal_longitude":294.8847,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":90.0882,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":155.2035,"elapsed_within_tithi_degrees":11.2035},"nakshatra":{"number":7,"name":"Punarvasu","pada":4,"moon_longitude":90.0882,"elapsed_within_degrees":10.0882},"yoga":{"number":2,"name":"Prīti","sum_longitude":24.9729},"karana":{"half_tithi_index":25,"name":"Taitila"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"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":10,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2499431.770833,"ahargana":1910966.2708,"kali_year":5232,"ayanamsa_lahiri":25.6845,"grahas":{"sun":{"sidereal_longitude":295.13118399999996,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":89.71148399999998,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":3},"retrograde":false,"latitude":0.1786},"mars":{"sidereal_longitude":242.98468400000002,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":303.337584,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":19.900783999999987,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2},"retrograde":false},"venus":{"sidereal_longitude":255.09518400000002,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":198.683084,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":87.8108,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":267.8108,"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":10,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2499431.770833,"kali_year":5232,"ahargana":1910966.2708,"sun":{"sidereal_longitude":294.8847,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":90.0882,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":155.2035,"elapsed_within_tithi_degrees":11.2035},"nakshatra":{"number":7,"name":"Punarvasu","pada":4,"moon_longitude":90.0882,"elapsed_within_degrees":10.0882},"yoga":{"number":2,"name":"Prīti","sum_longitude":24.9729},"karana":{"half_tithi_index":25,"name":"Taitila"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":0.179,"elongation":155.204},"lunar":{"type":"lunar","occurs":false,"moon_latitude":0.179,"opposition_distance":24.796}},"eclipse_window_40days":[{"offset_days":-12,"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":"07:02","sunsetLocal":"18:01","solarNoonLocal":"12:31","dayLengthHours":10.980462223624574,"dayLengthDisplay":"10 Hours 58 Mins 50 Secs","nightLengthDisplay":"13 Hours 01 Mins 10 Secs","moonriseLocal":"15:55","moonsetLocal":"05:44","rahuKala":{"name":"Rāhu Kāla","start":"09:47","end":"11:09","startHours":9.779489202285927,"endHours":11.152046980239,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:54","end":"15:16","startHours":13.897162536145142,"endHours":15.269720314098215,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:02","end":"08:24","startHours":7.034373646379783,"endHours":8.406931424332855,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:36","end":"09:58","startHours":9.59648149855885,"endHours":9.962496906013003,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:30","end":"07:47","startHours":7.4918929056974735,"endHours":7.784705231660795,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:10","end":"12:53","startHours":12.158589350737918,"endHours":12.890620165646224,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:34","end":"06:18","startHours":5.570312016563173,"endHours":6.302342831471478,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:07","end":"07:02","startHours":6.119335127744402,"endHours":7.034373646379783,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:21","end":"15:05","startHours":14.354681795462831,"endHours":15.086712610371135,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:49","end":"18:13","startHours":17.81483587000436,"endHours":18.214835870004357,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:01","end":"18:28","startHours":18.014835870004358,"endHours":18.47235512932205,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:46","end":"19:31","startHours":17.764835870004358,"endHours":19.514835870004358,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:10","end":"00:53","startHours":24.158589350737916,"endHours":24.890620165646222,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"07:02","end":"08:24","startHours":7.034373646379783,"endHours":8.406931424332855,"quality":"inauspicious"},{"name":"Śubha","start":"08:24","end":"09:47","startHours":8.406931424332855,"endHours":9.779489202285927,"quality":"auspicious"},{"name":"Roga","start":"09:47","end":"11:09","startHours":9.779489202285927,"endHours":11.152046980239,"quality":"inauspicious"},{"name":"Udveg","start":"11:09","end":"12:31","startHours":11.152046980239,"endHours":12.52460475819207,"quality":"inauspicious"},{"name":"Chala","start":"12:31","end":"13:54","startHours":12.52460475819207,"endHours":13.897162536145142,"quality":"neutral"},{"name":"Labha","start":"13:54","end":"15:16","startHours":13.897162536145142,"endHours":15.269720314098215,"quality":"auspicious"},{"name":"Amṛta","start":"15:16","end":"16:39","startHours":15.269720314098215,"endHours":16.642278092051285,"quality":"auspicious"},{"name":"Kāla","start":"16:39","end":"18:01","startHours":16.642278092051285,"endHours":18.014835870004358,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:01","end":"19:39","startHours":18.014835870004358,"endHours":19.642278092051285,"quality":"auspicious"},{"name":"Amṛta","start":"19:39","end":"21:16","startHours":19.642278092051285,"endHours":21.269720314098215,"quality":"auspicious"},{"name":"Kāla","start":"21:16","end":"22:54","startHours":21.269720314098215,"endHours":22.897162536145142,"quality":"inauspicious"},{"name":"Śubha","start":"22:54","end":"00:31","startHours":22.897162536145142,"endHours":24.52460475819207,"quality":"auspicious"},{"name":"Roga","start":"00:31","end":"02:09","startHours":24.52460475819207,"endHours":26.152046980239,"quality":"inauspicious"},{"name":"Udveg","start":"02:09","end":"03:47","startHours":26.152046980239,"endHours":27.779489202285927,"quality":"inauspicious"},{"name":"Chala","start":"03:47","end":"05:24","startHours":27.779489202285927,"endHours":29.406931424332853,"quality":"neutral"},{"name":"Labha","start":"05:24","end":"07:02","startHours":29.406931424332853,"endHours":31.034373646379784,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:02","end":"08:02","startHours":7.034373646379783,"endHours":8.034373646379784,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"08:02","end":"09:02","startHours":8.034373646379784,"endHours":9.034373646379784,"planetary_lord":"Moon"},{"name":"Hora 3","start":"09:02","end":"10:02","startHours":9.034373646379784,"endHours":10.034373646379784,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"10:02","end":"11:02","startHours":10.034373646379784,"endHours":11.034373646379784,"planetary_lord":"Venus"},{"name":"Hora 5","start":"11:02","end":"12:02","startHours":11.034373646379784,"endHours":12.034373646379784,"planetary_lord":"Sun"},{"name":"Hora 6","start":"12:02","end":"13:02","startHours":12.034373646379784,"endHours":13.034373646379784,"planetary_lord":"Mars"},{"name":"Hora 7","start":"13:02","end":"14:02","startHours":13.034373646379784,"endHours":14.034373646379784,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"14:02","end":"15:02","startHours":14.034373646379784,"endHours":15.034373646379784,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"15:02","end":"16:02","startHours":15.034373646379784,"endHours":16.034373646379784,"planetary_lord":"Moon"},{"name":"Hora 10","start":"16:02","end":"17:02","startHours":16.034373646379784,"endHours":17.034373646379784,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"17:02","end":"18:02","startHours":17.034373646379784,"endHours":18.034373646379784,"planetary_lord":"Venus"},{"name":"Hora 12","start":"18:02","end":"19:02","startHours":18.034373646379784,"endHours":19.034373646379784,"planetary_lord":"Sun"},{"name":"Hora 13","start":"19:02","end":"20:02","startHours":19.034373646379784,"endHours":20.034373646379784,"planetary_lord":"Mars"},{"name":"Hora 14","start":"20:02","end":"21:02","startHours":20.034373646379784,"endHours":21.034373646379784,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"21:02","end":"22:02","startHours":21.034373646379784,"endHours":22.034373646379784,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"22:02","end":"23:02","startHours":22.034373646379784,"endHours":23.034373646379784,"planetary_lord":"Moon"},{"name":"Hora 17","start":"23:02","end":"00:02","startHours":23.034373646379784,"endHours":24.034373646379784,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"00:02","end":"01:02","startHours":24.034373646379784,"endHours":25.034373646379784,"planetary_lord":"Venus"},{"name":"Hora 19","start":"01:02","end":"02:02","startHours":25.034373646379784,"endHours":26.034373646379784,"planetary_lord":"Sun"},{"name":"Hora 20","start":"02:02","end":"03:02","startHours":26.034373646379784,"endHours":27.034373646379784,"planetary_lord":"Mars"},{"name":"Hora 21","start":"03:02","end":"04:02","startHours":27.034373646379784,"endHours":28.034373646379784,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"04:02","end":"05:02","startHours":28.034373646379784,"endHours":29.034373646379784,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"05:02","end":"06:02","startHours":29.034373646379784,"endHours":30.034373646379784,"planetary_lord":"Moon"},{"name":"Hora 24","start":"06:02","end":"07:02","startHours":30.034373646379784,"endHours":31.034373646379784,"planetary_lord":"Mercury"}],"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","Mithuna","Siṃha","Vṛścika","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Karka","Kanyā","Tulā","Makara","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"South","rahuVasa":"East","anandadiYoga":{"name":"Dhūmra","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":-14.554108846958444,"eotMinutes":-14.546685491524224,"ayanamsa":25.6845}},"calendars":{"vikram_samvat":2188,"vikram_samvatsara":"Krodhi","saka_samvat":2053,"saka_samvatsara":"Khara","bengali_samvat":1538,"malayalam_era":1307,"nanakshahi_year":662,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Śukla Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Śukla Trayodaśī · Vikram 2188 Krodhi · Śaka 2053 Khara"},"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},{"id":"pradosha-vrata","name":"Pradoṣa Vrata","name_sanskrit":"प्रदोष व्रत","tradition":"Shaiva","associated_deity":"Śiva","significance":"Twilight worship of Śiva on Trayodaśī.","vrata":true,"detection":{"any_of":[{"tithi_number":13},{"tithi_number":28}]},"precedence":7}],"todays_walk":{"walk":{"id":"shani-walk","name":"Śani Walk","name_sanskrit":"शनि यात्रा","type":"graha","description":"Tapas + endurance + BG 17.14-19.","step_count":7,"url":"/walk/shani-walk"},"reason":"Śanivāra (Saturday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-1626101-04-03","event":"Bhagavān Rāma's birth at Ayodhyā","chart_id":"rama","shared_marker":"same Punarvasu","url":"/day/-1626101-04-03","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 February 10, 2131 CE · Ṛṣikeśa · Vidhyamitra","description":"February 10, 2131 CE for Ṛṣikeśa: Śukla Trayodaśī, sūryodaya 07:02, sūryāsta 18:01.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/2131-02-10","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/2131-02-10","sa":"https://sa.vidhyamitra.com/city/rishikesh/2131-02-10","hi":"https://hi.vidhyamitra.com/city/rishikesh/2131-02-10","x-default":"https://vidhyamitra.com/city/rishikesh/2131-02-10"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-23T08:11:41.104Z","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":"2026-05-23T08:11:41.104Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-23T08:11:41.104Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}