{"id":"vidhyamitra:city-day:omkareshwar:1981-02-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/omkareshwar/1981-02-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-02-13","date_display":"February 13, 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":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444648.770833,"kali_year":5082,"ahargana":1856183.2708,"sun":{"sidereal_longitude":300.7995,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":46.9078,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":106.1083,"elapsed_within_tithi_degrees":10.1083},"nakshatra":{"number":4,"name":"Rohiṇī","pada":3,"moon_longitude":46.9078,"elapsed_within_degrees":6.9078},"yoga":{"number":27,"name":"Vaidhṛti","sum_longitude":347.7073},"karana":{"half_tithi_index":17,"name":"Kaulava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"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":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444648.770833,"ahargana":1856183.2708,"kali_year":5082,"ayanamsa_lahiri":23.5892,"grahas":{"sun":{"sidereal_longitude":300.665397,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":47.53159699999998,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":3},"retrograde":false,"latitude":-4.0288},"mars":{"sidereal_longitude":311.520397,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":309.857297,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":true},"jupiter":{"sidereal_longitude":166.274897,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"venus":{"sidereal_longitude":287.696497,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":165.41189699999995,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":110.4777,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":290.4777,"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":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444648.770833,"kali_year":5082,"ahargana":1856183.2708,"sun":{"sidereal_longitude":300.7995,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":46.9078,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":106.1083,"elapsed_within_tithi_degrees":10.1083},"nakshatra":{"number":4,"name":"Rohiṇī","pada":3,"moon_longitude":46.9078,"elapsed_within_degrees":6.9078},"yoga":{"number":27,"name":"Vaidhṛti","sum_longitude":347.7073},"karana":{"half_tithi_index":17,"name":"Kaulava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.029,"elongation":106.108},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.029,"opposition_distance":73.892}},"eclipse_window_40days":[{"offset_days":-8,"type":"solar","occurs":true,"moon_latitude":-0.15,"elongation":0.162}]},"city":{"slug":"omkareshwar","name":"Oṁkāreśvar","lat":22.2429,"lon":76.1497,"tz_offset_hours":5.5,"state":"Madhya Pradesh","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"omkareshwar","name":"Oṁkāreśvar","lat":22.2429,"lon":76.1497,"tz_offset_hours":5.5,"state":"Madhya Pradesh","country":"IN","tier":"tirtha"},"sunriseLocal":"06:59","sunsetLocal":"18:21","solarNoonLocal":"12:40","dayLengthHours":11.376327868715677,"dayLengthDisplay":"11 Hours 22 Mins 35 Secs","nightLengthDisplay":"12 Hours 37 Mins 25 Secs","moonriseLocal":"13:06","moonsetLocal":"02:28","rahuKala":{"name":"Rāhu Kāla","start":"11:15","end":"12:40","startHours":11.244637770754242,"endHours":12.666678754343703,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"15:31","end":"16:56","startHours":15.510760721522622,"endHours":16.93280170511208,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"08:24","end":"09:49","startHours":8.400555803575322,"endHours":9.822596787164784,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:38","end":"10:01","startHours":9.632991322686188,"endHours":10.012202251643377,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:27","end":"07:45","startHours":7.45252848118235,"endHours":7.755897224348101,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:17","end":"13:03","startHours":12.287467825386514,"endHours":13.045889683300892,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:28","end":"06:13","startHours":5.461671104157107,"endHours":6.220092962071485,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:02","end":"06:59","startHours":6.03048749759289,"endHours":6.978514819985864,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:34","end":"15:19","startHours":14.562733399129648,"endHours":15.321155257044026,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:09","end":"18:33","startHours":18.154842688701542,"endHours":18.55484268870154,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:21","end":"18:50","startHours":18.35484268870154,"endHours":18.82885634989803,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:06","end":"19:51","startHours":18.10484268870154,"endHours":19.85484268870154,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:17","end":"01:03","startHours":24.287467825386514,"endHours":25.045889683300892,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"06:59","end":"08:24","startHours":6.978514819985864,"endHours":8.400555803575322,"quality":"neutral"},{"name":"Labha","start":"08:24","end":"09:49","startHours":8.400555803575322,"endHours":9.822596787164784,"quality":"auspicious"},{"name":"Amṛta","start":"09:49","end":"11:15","startHours":9.822596787164784,"endHours":11.244637770754242,"quality":"auspicious"},{"name":"Kāla","start":"11:15","end":"12:40","startHours":11.244637770754242,"endHours":12.666678754343703,"quality":"inauspicious"},{"name":"Śubha","start":"12:40","end":"14:05","startHours":12.666678754343703,"endHours":14.088719737933161,"quality":"auspicious"},{"name":"Roga","start":"14:05","end":"15:31","startHours":14.088719737933161,"endHours":15.510760721522622,"quality":"inauspicious"},{"name":"Udveg","start":"15:31","end":"16:56","startHours":15.510760721522622,"endHours":16.93280170511208,"quality":"inauspicious"},{"name":"Chala","start":"16:56","end":"18:21","startHours":16.93280170511208,"endHours":18.35484268870154,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"18:21","end":"19:56","startHours":18.35484268870154,"endHours":19.932801705112084,"quality":"inauspicious"},{"name":"Udveg","start":"19:56","end":"21:31","startHours":19.932801705112084,"endHours":21.510760721522622,"quality":"inauspicious"},{"name":"Chala","start":"21:31","end":"23:05","startHours":21.510760721522622,"endHours":23.08871973793316,"quality":"neutral"},{"name":"Labha","start":"23:05","end":"00:40","startHours":23.08871973793316,"endHours":24.666678754343703,"quality":"auspicious"},{"name":"Amṛta","start":"00:40","end":"02:15","startHours":24.666678754343703,"endHours":26.244637770754245,"quality":"auspicious"},{"name":"Kāla","start":"02:15","end":"03:49","startHours":26.244637770754245,"endHours":27.822596787164784,"quality":"inauspicious"},{"name":"Śubha","start":"03:49","end":"05:24","startHours":27.822596787164784,"endHours":29.400555803575322,"quality":"auspicious"},{"name":"Roga","start":"05:24","end":"06:59","startHours":29.400555803575322,"endHours":30.978514819985865,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:59","end":"07:59","startHours":6.978514819985864,"endHours":7.978514819985864,"planetary_lord":"Venus"},{"name":"Hora 2","start":"07:59","end":"08:59","startHours":7.978514819985864,"endHours":8.978514819985865,"planetary_lord":"Sun"},{"name":"Hora 3","start":"08:59","end":"09:59","startHours":8.978514819985865,"endHours":9.978514819985865,"planetary_lord":"Mars"},{"name":"Hora 4","start":"09:59","end":"10:59","startHours":9.978514819985865,"endHours":10.978514819985865,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"10:59","end":"11:59","startHours":10.978514819985865,"endHours":11.978514819985865,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"11:59","end":"12:59","startHours":11.978514819985865,"endHours":12.978514819985865,"planetary_lord":"Moon"},{"name":"Hora 7","start":"12:59","end":"13:59","startHours":12.978514819985865,"endHours":13.978514819985865,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"13:59","end":"14:59","startHours":13.978514819985865,"endHours":14.978514819985865,"planetary_lord":"Venus"},{"name":"Hora 9","start":"14:59","end":"15:59","startHours":14.978514819985865,"endHours":15.978514819985865,"planetary_lord":"Sun"},{"name":"Hora 10","start":"15:59","end":"16:59","startHours":15.978514819985865,"endHours":16.978514819985865,"planetary_lord":"Mars"},{"name":"Hora 11","start":"16:59","end":"17:59","startHours":16.978514819985865,"endHours":17.978514819985865,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"17:59","end":"18:59","startHours":17.978514819985865,"endHours":18.978514819985865,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"18:59","end":"19:59","startHours":18.978514819985865,"endHours":19.978514819985865,"planetary_lord":"Moon"},{"name":"Hora 14","start":"19:59","end":"20:59","startHours":19.978514819985865,"endHours":20.978514819985865,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"20:59","end":"21:59","startHours":20.978514819985865,"endHours":21.978514819985865,"planetary_lord":"Venus"},{"name":"Hora 16","start":"21:59","end":"22:59","startHours":21.978514819985865,"endHours":22.978514819985865,"planetary_lord":"Sun"},{"name":"Hora 17","start":"22:59","end":"23:59","startHours":22.978514819985865,"endHours":23.978514819985865,"planetary_lord":"Mars"},{"name":"Hora 18","start":"23:59","end":"00:59","startHours":23.978514819985865,"endHours":24.978514819985865,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"00:59","end":"01:59","startHours":24.978514819985865,"endHours":25.978514819985865,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"01:59","end":"02:59","startHours":25.978514819985865,"endHours":26.978514819985865,"planetary_lord":"Moon"},{"name":"Hora 21","start":"02:59","end":"03:59","startHours":26.978514819985865,"endHours":27.978514819985865,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"03:59","end":"04:59","startHours":27.978514819985865,"endHours":28.978514819985865,"planetary_lord":"Venus"},{"name":"Hora 23","start":"04:59","end":"05:59","startHours":28.978514819985865,"endHours":29.978514819985865,"planetary_lord":"Sun"},{"name":"Hora 24","start":"05:59","end":"06:59","startHours":29.978514819985865,"endHours":30.978514819985865,"planetary_lord":"Mars"}],"taraBala":{"favorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Citrā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Karka","Tulā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Siṃha","Kanyā","Dhanu","Makara"]},"dishaShool":"West (Paścim)","chandraVasa":"South-East","rahuVasa":"South-East","anandadiYoga":{"name":"Mātaṇga","quality":"Auspicious"},"tropicalRitu":"Śiśira (Winter)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-13.435416079955456,"eotMinutes":-14.599525260622107,"ayanamsa":23.5892}},"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":"Kumbha (Māsi)","ritu":"Śiśira (Winter)","display_summary":"Māgha Śukla Navamī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[],"todays_walk":{"walk":{"id":"shukra-walk","name":"Śukra Walk","name_sanskrit":"शुक्र यात्रा","type":"graha","description":"Beauty + creativity in dharma + BG 10.36.","step_count":5,"url":"/walk/shukra-walk"},"reason":"Śukravāra (Friday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3226-07-09","event":"Bhagavān Krishna's birth at Mathurā","chart_id":"krishna","shared_marker":"same Rohiṇī","url":"/day/-3226-07-09","relevance":0.5},{"historical_date":"-1626101-04-03","event":"Bhagavān Rāma's birth at Ayodhyā","chart_id":"rama","shared_marker":"same Śukla Navamī","url":"/day/-1626101-04-03","relevance":0.5}]},"validity":{"eternal":false,"location_specific":"omkareshwar"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga February 13, 1981 CE · Oṁkāreśvar · Vidhyamitra","description":"February 13, 1981 CE for Oṁkāreśvar: Śukla Navamī, sūryodaya 06:59, sūryāsta 18:21.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/omkareshwar/1981-02-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/omkareshwar/1981-02-13","sa":"https://sa.vidhyamitra.com/city/omkareshwar/1981-02-13","hi":"https://hi.vidhyamitra.com/city/omkareshwar/1981-02-13","x-default":"https://vidhyamitra.com/city/omkareshwar/1981-02-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T10:23:03.113Z","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":"2026-05-31T10:23:03.114Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T10:23:03.114Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}