{"id":"vidhyamitra:city-day:rishikesh:2131-02-21:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/2131-02-21","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2131-02-21","date_display":"February 21, 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":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2499442.770833,"kali_year":5232,"ahargana":1910977.2708,"sun":{"sidereal_longitude":306.0613,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":225.9351,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":24,"name":"Navamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Navamī","elongation_degrees":279.8738,"elapsed_within_tithi_degrees":3.8738},"nakshatra":{"number":17,"name":"Anurādhā","pada":4,"moon_longitude":225.9351,"elapsed_within_degrees":12.6018},"yoga":{"number":13,"name":"Vyāghāta","sum_longitude":171.9964},"karana":{"half_tithi_index":46,"name":"Taitila"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"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":21,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2499442.770833,"ahargana":1910977.2708,"kali_year":5232,"ayanamsa_lahiri":25.6849,"grahas":{"sun":{"sidereal_longitude":306.25016300000004,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":223.74456299999997,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":4},"retrograde":false,"latitude":2.9679},"mars":{"sidereal_longitude":250.699163,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":321.67456300000003,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":21.14586300000002,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3},"retrograde":false},"venus":{"sidereal_longitude":268.42406300000005,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":198.82586300000003,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":87.2279,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":267.2279,"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":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2499442.770833,"kali_year":5232,"ahargana":1910977.2708,"sun":{"sidereal_longitude":306.0613,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":225.9351,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":24,"name":"Navamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Navamī","elongation_degrees":279.8738,"elapsed_within_tithi_degrees":3.8738},"nakshatra":{"number":17,"name":"Anurādhā","pada":4,"moon_longitude":225.9351,"elapsed_within_degrees":12.6018},"yoga":{"number":13,"name":"Vyāghāta","sum_longitude":171.9964},"karana":{"half_tithi_index":46,"name":"Taitila"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.968,"elongation":80.126},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.968,"opposition_distance":99.874}},"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":"06:53","sunsetLocal":"18:10","solarNoonLocal":"12:31","dayLengthHours":11.286516450886005,"dayLengthDisplay":"11 Hours 17 Mins 11 Secs","nightLengthDisplay":"12 Hours 42 Mins 49 Secs","moonriseLocal":"01:52","moonsetLocal":"12:10","rahuKala":{"name":"Rāhu Kāla","start":"12:31","end":"13:56","startHours":12.518657372353939,"endHours":13.92947192871469,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"08:17","end":"09:42","startHours":8.286213703271688,"endHours":9.697028259632438,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"11:06","end":"12:31","startHours":11.107842815993187,"endHours":12.518657372353939,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:31","end":"09:53","startHours":9.50891965211767,"endHours":9.885136867147205,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:21","end":"07:39","startHours":7.345670665697853,"endHours":7.646644437721481,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:09","end":"12:54","startHours":12.142440157324405,"endHours":12.894874587383473,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:22","end":"06:07","startHours":5.370530286792802,"endHours":6.12296471685187,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:56","end":"06:53","startHours":5.934856109337103,"endHours":6.875399146910937,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:24","end":"15:09","startHours":14.399743447501606,"endHours":15.152177877560673,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:58","end":"18:22","startHours":17.961915597796942,"endHours":18.36191559779694,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:10","end":"18:38","startHours":18.16191559779694,"endHours":18.632187116583857,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:55","end":"19:40","startHours":17.91191559779694,"endHours":19.66191559779694,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:09","end":"00:54","startHours":24.142440157324405,"endHours":24.894874587383473,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"06:53","end":"08:17","startHours":6.875399146910937,"endHours":8.286213703271688,"quality":"auspicious"},{"name":"Amṛta","start":"08:17","end":"09:42","startHours":8.286213703271688,"endHours":9.697028259632438,"quality":"auspicious"},{"name":"Kāla","start":"09:42","end":"11:06","startHours":9.697028259632438,"endHours":11.107842815993187,"quality":"inauspicious"},{"name":"Śubha","start":"11:06","end":"12:31","startHours":11.107842815993187,"endHours":12.518657372353939,"quality":"auspicious"},{"name":"Roga","start":"12:31","end":"13:56","startHours":12.518657372353939,"endHours":13.92947192871469,"quality":"inauspicious"},{"name":"Udveg","start":"13:56","end":"15:20","startHours":13.92947192871469,"endHours":15.34028648507544,"quality":"inauspicious"},{"name":"Chala","start":"15:20","end":"16:45","startHours":15.34028648507544,"endHours":16.75110104143619,"quality":"neutral"},{"name":"Labha","start":"16:45","end":"18:10","startHours":16.75110104143619,"endHours":18.16191559779694,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"18:10","end":"19:45","startHours":18.16191559779694,"endHours":19.75110104143619,"quality":"inauspicious"},{"name":"Chala","start":"19:45","end":"21:20","startHours":19.75110104143619,"endHours":21.34028648507544,"quality":"neutral"},{"name":"Labha","start":"21:20","end":"22:56","startHours":21.34028648507544,"endHours":22.92947192871469,"quality":"auspicious"},{"name":"Amṛta","start":"22:56","end":"00:31","startHours":22.92947192871469,"endHours":24.51865737235394,"quality":"auspicious"},{"name":"Kāla","start":"00:31","end":"02:06","startHours":24.51865737235394,"endHours":26.107842815993187,"quality":"inauspicious"},{"name":"Śubha","start":"02:06","end":"03:42","startHours":26.107842815993187,"endHours":27.69702825963244,"quality":"auspicious"},{"name":"Roga","start":"03:42","end":"05:17","startHours":27.69702825963244,"endHours":29.286213703271688,"quality":"inauspicious"},{"name":"Udveg","start":"05:17","end":"06:53","startHours":29.286213703271688,"endHours":30.875399146910937,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:53","end":"07:53","startHours":6.875399146910937,"endHours":7.875399146910937,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"07:53","end":"08:53","startHours":7.875399146910937,"endHours":8.875399146910937,"planetary_lord":"Venus"},{"name":"Hora 3","start":"08:53","end":"09:53","startHours":8.875399146910937,"endHours":9.875399146910937,"planetary_lord":"Sun"},{"name":"Hora 4","start":"09:53","end":"10:53","startHours":9.875399146910937,"endHours":10.875399146910937,"planetary_lord":"Mars"},{"name":"Hora 5","start":"10:53","end":"11:53","startHours":10.875399146910937,"endHours":11.875399146910937,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"11:53","end":"12:53","startHours":11.875399146910937,"endHours":12.875399146910937,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"12:53","end":"13:53","startHours":12.875399146910937,"endHours":13.875399146910937,"planetary_lord":"Moon"},{"name":"Hora 8","start":"13:53","end":"14:53","startHours":13.875399146910937,"endHours":14.875399146910937,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"14:53","end":"15:53","startHours":14.875399146910937,"endHours":15.875399146910937,"planetary_lord":"Venus"},{"name":"Hora 10","start":"15:53","end":"16:53","startHours":15.875399146910937,"endHours":16.875399146910937,"planetary_lord":"Sun"},{"name":"Hora 11","start":"16:53","end":"17:53","startHours":16.875399146910937,"endHours":17.875399146910937,"planetary_lord":"Mars"},{"name":"Hora 12","start":"17:53","end":"18:53","startHours":17.875399146910937,"endHours":18.875399146910937,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"18:53","end":"19:53","startHours":18.875399146910937,"endHours":19.875399146910937,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"19:53","end":"20:53","startHours":19.875399146910937,"endHours":20.875399146910937,"planetary_lord":"Moon"},{"name":"Hora 15","start":"20:53","end":"21:53","startHours":20.875399146910937,"endHours":21.875399146910937,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"21:53","end":"22:53","startHours":21.875399146910937,"endHours":22.875399146910937,"planetary_lord":"Venus"},{"name":"Hora 17","start":"22:53","end":"23:53","startHours":22.875399146910937,"endHours":23.875399146910937,"planetary_lord":"Sun"},{"name":"Hora 18","start":"23:53","end":"00:53","startHours":23.875399146910937,"endHours":24.875399146910937,"planetary_lord":"Mars"},{"name":"Hora 19","start":"00:53","end":"01:53","startHours":24.875399146910937,"endHours":25.875399146910937,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"01:53","end":"02:53","startHours":25.875399146910937,"endHours":26.875399146910937,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"02:53","end":"03:53","startHours":26.875399146910937,"endHours":27.875399146910937,"planetary_lord":"Moon"},{"name":"Hora 22","start":"03:53","end":"04:53","startHours":27.875399146910937,"endHours":28.875399146910937,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"04:53","end":"05:53","startHours":28.875399146910937,"endHours":29.875399146910937,"planetary_lord":"Venus"},{"name":"Hora 24","start":"05:53","end":"06:53","startHours":29.875399146910937,"endHours":30.875399146910937,"planetary_lord":"Sun"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Revatī"],"unfavorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Citrā","Svātī","Viśākhā","Anurādhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara 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":"North (Uttara)","chandraVasa":"North-East","rahuVasa":"South-West","anandadiYoga":{"name":"Ānanda","quality":"Auspicious"},"tropicalRitu":"Śiśira (Winter) (tropical)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-10.784873174509396,"eotMinutes":-14.189842341236304,"ayanamsa":25.6849}},"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","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Phālguna","lunar_month_amanta":"Māgha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Kumbha (Māsi)","ritu":"Śiśira (Winter)","display_summary":"Phālguna Kṛṣṇa Navamī · Vikram 2188 Krodhi · Śaka 2053 Khara"},"festivals":[],"todays_walk":{"walk":{"id":"budha-walk","name":"Budha Walk","name_sanskrit":"बुध यात्रा","type":"graha","description":"Discrimination + BG 2.41 (vyavasāyātmikā buddhi).","step_count":6,"url":"/walk/budha-walk"},"reason":"Budhavāra (Wednesday) — 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 21, 2131 CE · Ṛṣikeśa · Vidhyamitra","description":"February 21, 2131 CE for Ṛṣikeśa: Kṛṣṇa Navamī, sūryodaya 06:53, sūryāsta 18:10.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/2131-02-21","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/2131-02-21","sa":"https://sa.vidhyamitra.com/city/rishikesh/2131-02-21","hi":"https://hi.vidhyamitra.com/city/rishikesh/2131-02-21","x-default":"https://vidhyamitra.com/city/rishikesh/2131-02-21"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T14:41:53.934Z","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":"2026-05-31T14:41:53.934Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T14:41:53.934Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}