{"id":"vidhyamitra:city-day:ranchi:1981-02-09:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/ranchi/1981-02-09","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-02-09","date_display":"February 9, 1981 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":1981,"month":2,"day":9,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444644.770833,"kali_year":5082,"ahargana":1856179.2708,"sun":{"sidereal_longitude":296.7316,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":349.1755,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":5,"name":"Pañcamī","paksha":"Śukla","full_name":"Śukla Pañcamī","elongation_degrees":52.4439,"elapsed_within_tithi_degrees":4.4439},"nakshatra":{"number":27,"name":"Revatī","pada":1,"moon_longitude":349.1755,"elapsed_within_degrees":2.5089},"yoga":{"number":22,"name":"Sādhya","sum_longitude":285.9071},"karana":{"half_tithi_index":8,"name":"Bava"},"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":1981,"month":2,"day":9,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444644.770833,"ahargana":1856179.2708,"kali_year":5082,"ayanamsa_lahiri":23.5891,"grahas":{"sun":{"sidereal_longitude":296.61915,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":350.75265,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false,"latitude":-3.8352},"mars":{"sidereal_longitude":308.36175000000003,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":311.6260500000001,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":166.48894999999993,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"venus":{"sidereal_longitude":282.68935,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":165.57065,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":110.6897,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":290.6897,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":1981,"month":2,"day":9,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444644.770833,"kali_year":5082,"ahargana":1856179.2708,"sun":{"sidereal_longitude":296.7316,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":349.1755,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":5,"name":"Pañcamī","paksha":"Śukla","full_name":"Śukla Pañcamī","elongation_degrees":52.4439,"elapsed_within_tithi_degrees":4.4439},"nakshatra":{"number":27,"name":"Revatī","pada":1,"moon_longitude":349.1755,"elapsed_within_degrees":2.5089},"yoga":{"number":22,"name":"Sādhya","sum_longitude":285.9071},"karana":{"half_tithi_index":8,"name":"Bava"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.835,"elongation":52.444},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.835,"opposition_distance":127.556}},"eclipse_window_40days":[{"offset_days":-20,"type":"lunar","occurs":true,"moon_latitude":-1.332,"opposition_distance":1.776},{"offset_days":-4,"type":"solar","occurs":true,"moon_latitude":-0.15,"elongation":0.162}]},"city":{"slug":"ranchi","name":"Ranchi, Jharkhand","lat":23.3441,"lon":85.3096,"tz_offset_hours":5.5,"state":"Jharkhand","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"ranchi","name":"Ranchi, Jharkhand","lat":23.3441,"lon":85.3096,"tz_offset_hours":5.5,"state":"Jharkhand","country":"IN","tier":"tier-1"},"sunriseLocal":"06:26","sunsetLocal":"17:41","solarNoonLocal":"12:03","dayLengthHours":11.256068291481604,"dayLengthDisplay":"11 Hours 15 Mins 22 Secs","nightLengthDisplay":"12 Hours 44 Mins 38 Secs","moonriseLocal":"09:27","moonsetLocal":"21:52","rahuKala":{"name":"Rāhu Kāla","start":"07:50","end":"09:14","startHours":7.833389552737595,"endHours":9.240398089172796,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:39","end":"12:03","startHours":10.647406625607996,"endHours":12.054415162043195,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:28","end":"14:52","startHours":13.461423698478397,"endHours":14.868432234913598,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:03","end":"09:26","startHours":9.052796950981435,"endHours":9.427999227364156,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:54","end":"07:12","startHours":6.895383861780794,"endHours":7.19554568288697,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:41","end":"12:26","startHours":11.679212885660474,"endHours":12.429617438425916,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:56","end":"05:41","startHours":4.925571910771514,"endHours":5.675976463536954,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:29","end":"06:26","startHours":5.488375325345594,"endHours":6.426381016302394,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:56","end":"14:41","startHours":13.930426543956797,"endHours":14.680831096722237,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:29","end":"17:53","startHours":17.482449307783998,"endHours":17.882449307783997,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:41","end":"18:09","startHours":17.682449307783997,"endHours":18.151452153262397,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:26","end":"19:11","startHours":17.432449307783997,"endHours":19.182449307783997,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:41","end":"00:26","startHours":23.679212885660476,"endHours":24.429617438425915,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"06:26","end":"07:50","startHours":6.426381016302394,"endHours":7.833389552737595,"quality":"auspicious"},{"name":"Kāla","start":"07:50","end":"09:14","startHours":7.833389552737595,"endHours":9.240398089172796,"quality":"inauspicious"},{"name":"Śubha","start":"09:14","end":"10:39","startHours":9.240398089172796,"endHours":10.647406625607996,"quality":"auspicious"},{"name":"Roga","start":"10:39","end":"12:03","startHours":10.647406625607996,"endHours":12.054415162043195,"quality":"inauspicious"},{"name":"Udveg","start":"12:03","end":"13:28","startHours":12.054415162043195,"endHours":13.461423698478397,"quality":"inauspicious"},{"name":"Chala","start":"13:28","end":"14:52","startHours":13.461423698478397,"endHours":14.868432234913598,"quality":"neutral"},{"name":"Labha","start":"14:52","end":"16:17","startHours":14.868432234913598,"endHours":16.275440771348798,"quality":"auspicious"},{"name":"Amṛta","start":"16:17","end":"17:41","startHours":16.275440771348798,"endHours":17.682449307783997,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"17:41","end":"19:17","startHours":17.682449307783997,"endHours":19.275440771348798,"quality":"neutral"},{"name":"Labha","start":"19:17","end":"20:52","startHours":19.275440771348798,"endHours":20.868432234913598,"quality":"auspicious"},{"name":"Amṛta","start":"20:52","end":"22:28","startHours":20.868432234913598,"endHours":22.461423698478395,"quality":"auspicious"},{"name":"Kāla","start":"22:28","end":"00:03","startHours":22.461423698478395,"endHours":24.054415162043195,"quality":"inauspicious"},{"name":"Śubha","start":"00:03","end":"01:39","startHours":24.054415162043195,"endHours":25.647406625607996,"quality":"auspicious"},{"name":"Roga","start":"01:39","end":"03:14","startHours":25.647406625607996,"endHours":27.240398089172793,"quality":"inauspicious"},{"name":"Udveg","start":"03:14","end":"04:50","startHours":27.240398089172793,"endHours":28.833389552737593,"quality":"inauspicious"},{"name":"Chala","start":"04:50","end":"06:26","startHours":28.833389552737593,"endHours":30.426381016302393,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"06:26","end":"07:26","startHours":6.426381016302394,"endHours":7.426381016302394,"planetary_lord":"Moon"},{"name":"Hora 2","start":"07:26","end":"08:26","startHours":7.426381016302394,"endHours":8.426381016302393,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"08:26","end":"09:26","startHours":8.426381016302393,"endHours":9.426381016302393,"planetary_lord":"Venus"},{"name":"Hora 4","start":"09:26","end":"10:26","startHours":9.426381016302393,"endHours":10.426381016302393,"planetary_lord":"Sun"},{"name":"Hora 5","start":"10:26","end":"11:26","startHours":10.426381016302393,"endHours":11.426381016302393,"planetary_lord":"Mars"},{"name":"Hora 6","start":"11:26","end":"12:26","startHours":11.426381016302393,"endHours":12.426381016302393,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"12:26","end":"13:26","startHours":12.426381016302393,"endHours":13.426381016302393,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"13:26","end":"14:26","startHours":13.426381016302393,"endHours":14.426381016302393,"planetary_lord":"Moon"},{"name":"Hora 9","start":"14:26","end":"15:26","startHours":14.426381016302393,"endHours":15.426381016302393,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"15:26","end":"16:26","startHours":15.426381016302393,"endHours":16.426381016302393,"planetary_lord":"Venus"},{"name":"Hora 11","start":"16:26","end":"17:26","startHours":16.426381016302393,"endHours":17.426381016302393,"planetary_lord":"Sun"},{"name":"Hora 12","start":"17:26","end":"18:26","startHours":17.426381016302393,"endHours":18.426381016302393,"planetary_lord":"Mars"},{"name":"Hora 13","start":"18:26","end":"19:26","startHours":18.426381016302393,"endHours":19.426381016302393,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"19:26","end":"20:26","startHours":19.426381016302393,"endHours":20.426381016302393,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"20:26","end":"21:26","startHours":20.426381016302393,"endHours":21.426381016302393,"planetary_lord":"Moon"},{"name":"Hora 16","start":"21:26","end":"22:26","startHours":21.426381016302393,"endHours":22.426381016302393,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"22:26","end":"23:26","startHours":22.426381016302393,"endHours":23.426381016302393,"planetary_lord":"Venus"},{"name":"Hora 18","start":"23:26","end":"00:26","startHours":23.426381016302393,"endHours":24.426381016302393,"planetary_lord":"Sun"},{"name":"Hora 19","start":"00:26","end":"01:26","startHours":24.426381016302393,"endHours":25.426381016302393,"planetary_lord":"Mars"},{"name":"Hora 20","start":"01:26","end":"02:26","startHours":25.426381016302393,"endHours":26.426381016302393,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"02:26","end":"03:26","startHours":26.426381016302393,"endHours":27.426381016302393,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"03:26","end":"04:26","startHours":27.426381016302393,"endHours":28.426381016302393,"planetary_lord":"Moon"},{"name":"Hora 23","start":"04:26","end":"05:26","startHours":28.426381016302393,"endHours":29.426381016302393,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"05:26","end":"06:26","startHours":29.426381016302393,"endHours":30.426381016302393,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"unfavorable_nakshatras":["Ārdrā","Punarvasu","Puṣya","Aśleṣā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Siṃha","Kanyā","Dhanu","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Karka","Tulā","Vṛścika","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"South-West","rahuVasa":"North-East","anandadiYoga":{"name":"Dhūmra","quality":"Inauspicious"},"tropicalRitu":"Śiśira (Winter) (tropical)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-14.746827649045654,"eotMinutes":-14.503309722591807,"ayanamsa":23.5891}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Māgha","lunar_month_amanta":"Māgha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Śukla Pañcamī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"sarasvati-jayanti","name":"Sarasvatī Jayantī (Vasanta Pañchamī)","name_sanskrit":"सरस्वती जयन्ती / वसन्त पञ्चमी","tradition":"Pan-Hindu","associated_deity":"Sarasvatī (Vāk-tattva)","significance":"Manifestation of Devī Sarasvatī; vidyā-ārambha day; vasanta-ṛtu begins.","vrata":true,"detection":{"tithi_number":5,"tithi_paksha":"Śukla","lunar_month":"Māgha"},"precedence":2,"sources":["Skanda Purāṇa","Devī Bhāgavata"]}],"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":"ranchi"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga February 9, 1981 CE · Ranchi, Jharkhand · Vidhyamitra","description":"February 9, 1981 CE for Ranchi, Jharkhand: Śukla Pañcamī, sūryodaya 06:26, sūryāsta 17:41.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/ranchi/1981-02-09","hreflang_alternates":{"en":"https://vidhyamitra.com/city/ranchi/1981-02-09","sa":"https://sa.vidhyamitra.com/city/ranchi/1981-02-09","hi":"https://hi.vidhyamitra.com/city/ranchi/1981-02-09","x-default":"https://vidhyamitra.com/city/ranchi/1981-02-09"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T00:09:49.125Z","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":"2026-06-01T00:09:49.125Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T00:09:49.125Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}