{"id":"vidhyamitra:city-day:rameshwaram:1981-04-17:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rameshwaram/1981-04-17","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-04-17","date_display":"April 17, 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":4,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444711.770833,"kali_year":5083,"ahargana":1856246.2708,"sun":{"sidereal_longitude":3.5242,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":157.8658,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":154.3416,"elapsed_within_tithi_degrees":10.3416},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4,"moon_longitude":157.8658,"elapsed_within_degrees":11.1992},"yoga":{"number":13,"name":"Vyāghāta","sum_longitude":161.39},"karana":{"half_tithi_index":25,"name":"Taitila"},"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":4,"day":17,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444711.770833,"ahargana":1856246.2708,"kali_year":5083,"ayanamsa_lahiri":23.5917,"grahas":{"sun":{"sidereal_longitude":3.3591900000000123,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":158.11369000000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false,"latitude":3.4821},"mars":{"sidereal_longitude":0.43049000000002025,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":352.14829,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":159.34969,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"venus":{"sidereal_longitude":6.126890000000003,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":161.05818999999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":107.1397,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":287.1397,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"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":4,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444711.770833,"kali_year":5083,"ahargana":1856246.2708,"sun":{"sidereal_longitude":3.5242,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":157.8658,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":154.3416,"elapsed_within_tithi_degrees":10.3416},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4,"moon_longitude":157.8658,"elapsed_within_degrees":11.1992},"yoga":{"number":13,"name":"Vyāghāta","sum_longitude":161.39},"karana":{"half_tithi_index":25,"name":"Taitila"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.482,"elongation":154.342},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.482,"opposition_distance":25.658}},"eclipse_window_40days":[]},"city":{"slug":"rameshwaram","name":"Rāmeśvaram","lat":9.2876,"lon":79.3129,"tz_offset_hours":5.5,"state":"Tamil Nadu","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"rameshwaram","name":"Rāmeśvaram","lat":9.2876,"lon":79.3129,"tz_offset_hours":5.5,"state":"Tamil Nadu","country":"IN","tier":"tirtha"},"sunriseLocal":"06:02","sunsetLocal":"18:23","solarNoonLocal":"12:12","dayLengthHours":12.343482621924165,"dayLengthDisplay":"12 Hours 20 Mins 37 Secs","nightLengthDisplay":"11 Hours 39 Mins 23 Secs","moonriseLocal":"16:30","moonsetLocal":"04:33","rahuKala":{"name":"Rāhu Kāla","start":"10:40","end":"12:12","startHours":10.665137189263984,"endHours":12.208072517004503,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"15:18","end":"16:50","startHours":15.293943172485545,"endHours":16.836878500226064,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:35","end":"09:07","startHours":7.579266533782942,"endHours":9.122201861523463,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:55","end":"09:20","startHours":8.916477151158059,"endHours":9.327926571888865,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:33","end":"06:53","startHours":6.550642981955928,"endHours":6.879802518540572,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:48","end":"12:37","startHours":11.796623096273697,"endHours":12.619521937735309,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:23","end":"05:13","startHours":4.390533523119199,"endHours":5.21343236458081,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:00","end":"06:02","startHours":5.007707654215407,"endHours":6.036331206042421,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:16","end":"15:05","startHours":14.265319620658532,"endHours":15.088218462120144,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:11","end":"18:35","startHours":18.179813827966587,"endHours":18.579813827966586,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:23","end":"18:54","startHours":18.379813827966586,"endHours":18.89412560388009,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:08","end":"19:53","startHours":18.129813827966586,"endHours":19.879813827966586,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:48","end":"00:37","startHours":23.7966230962737,"endHours":24.619521937735307,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"06:02","end":"07:35","startHours":6.036331206042421,"endHours":7.579266533782942,"quality":"neutral"},{"name":"Labha","start":"07:35","end":"09:07","startHours":7.579266533782942,"endHours":9.122201861523463,"quality":"auspicious"},{"name":"Amṛta","start":"09:07","end":"10:40","startHours":9.122201861523463,"endHours":10.665137189263984,"quality":"auspicious"},{"name":"Kāla","start":"10:40","end":"12:12","startHours":10.665137189263984,"endHours":12.208072517004503,"quality":"inauspicious"},{"name":"Śubha","start":"12:12","end":"13:45","startHours":12.208072517004503,"endHours":13.751007844745025,"quality":"auspicious"},{"name":"Roga","start":"13:45","end":"15:18","startHours":13.751007844745025,"endHours":15.293943172485545,"quality":"inauspicious"},{"name":"Udveg","start":"15:18","end":"16:50","startHours":15.293943172485545,"endHours":16.836878500226064,"quality":"inauspicious"},{"name":"Chala","start":"16:50","end":"18:23","startHours":16.836878500226064,"endHours":18.379813827966586,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"18:23","end":"19:50","startHours":18.379813827966586,"endHours":19.836878500226067,"quality":"inauspicious"},{"name":"Udveg","start":"19:50","end":"21:18","startHours":19.836878500226067,"endHours":21.293943172485545,"quality":"inauspicious"},{"name":"Chala","start":"21:18","end":"22:45","startHours":21.293943172485545,"endHours":22.751007844745025,"quality":"neutral"},{"name":"Labha","start":"22:45","end":"00:12","startHours":22.751007844745025,"endHours":24.208072517004503,"quality":"auspicious"},{"name":"Amṛta","start":"00:12","end":"01:40","startHours":24.208072517004503,"endHours":25.665137189263984,"quality":"auspicious"},{"name":"Kāla","start":"01:40","end":"03:07","startHours":25.665137189263984,"endHours":27.122201861523465,"quality":"inauspicious"},{"name":"Śubha","start":"03:07","end":"04:35","startHours":27.122201861523465,"endHours":28.579266533782942,"quality":"auspicious"},{"name":"Roga","start":"04:35","end":"06:02","startHours":28.579266533782942,"endHours":30.03633120604242,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:02","end":"07:02","startHours":6.036331206042421,"endHours":7.036331206042421,"planetary_lord":"Venus"},{"name":"Hora 2","start":"07:02","end":"08:02","startHours":7.036331206042421,"endHours":8.036331206042421,"planetary_lord":"Sun"},{"name":"Hora 3","start":"08:02","end":"09:02","startHours":8.036331206042421,"endHours":9.036331206042421,"planetary_lord":"Mars"},{"name":"Hora 4","start":"09:02","end":"10:02","startHours":9.036331206042421,"endHours":10.036331206042421,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"10:02","end":"11:02","startHours":10.036331206042421,"endHours":11.036331206042421,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"11:02","end":"12:02","startHours":11.036331206042421,"endHours":12.036331206042421,"planetary_lord":"Moon"},{"name":"Hora 7","start":"12:02","end":"13:02","startHours":12.036331206042421,"endHours":13.036331206042421,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"13:02","end":"14:02","startHours":13.036331206042421,"endHours":14.036331206042421,"planetary_lord":"Venus"},{"name":"Hora 9","start":"14:02","end":"15:02","startHours":14.036331206042421,"endHours":15.036331206042421,"planetary_lord":"Sun"},{"name":"Hora 10","start":"15:02","end":"16:02","startHours":15.036331206042421,"endHours":16.03633120604242,"planetary_lord":"Mars"},{"name":"Hora 11","start":"16:02","end":"17:02","startHours":16.03633120604242,"endHours":17.03633120604242,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"17:02","end":"18:02","startHours":17.03633120604242,"endHours":18.03633120604242,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"18:02","end":"19:02","startHours":18.03633120604242,"endHours":19.03633120604242,"planetary_lord":"Moon"},{"name":"Hora 14","start":"19:02","end":"20:02","startHours":19.03633120604242,"endHours":20.03633120604242,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"20:02","end":"21:02","startHours":20.03633120604242,"endHours":21.03633120604242,"planetary_lord":"Venus"},{"name":"Hora 16","start":"21:02","end":"22:02","startHours":21.03633120604242,"endHours":22.03633120604242,"planetary_lord":"Sun"},{"name":"Hora 17","start":"22:02","end":"23:02","startHours":22.03633120604242,"endHours":23.03633120604242,"planetary_lord":"Mars"},{"name":"Hora 18","start":"23:02","end":"00:02","startHours":23.03633120604242,"endHours":24.03633120604242,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"00:02","end":"01:02","startHours":24.03633120604242,"endHours":25.03633120604242,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"01:02","end":"02:02","startHours":25.03633120604242,"endHours":26.03633120604242,"planetary_lord":"Moon"},{"name":"Hora 21","start":"02:02","end":"03:02","startHours":26.03633120604242,"endHours":27.03633120604242,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"03:02","end":"04:02","startHours":27.03633120604242,"endHours":28.03633120604242,"planetary_lord":"Venus"},{"name":"Hora 23","start":"04:02","end":"05:02","startHours":28.03633120604242,"endHours":29.03633120604242,"planetary_lord":"Sun"},{"name":"Hora 24","start":"05:02","end":"06:02","startHours":29.03633120604242,"endHours":30.03633120604242,"planetary_lord":"Mars"}],"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":"West (Paścim)","chandraVasa":"North-West","rahuVasa":"South-East","anandadiYoga":{"name":"Prajāpati","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":10.385075713561033,"eotMinutes":0.2640489797298191,"ayanamsa":23.5917}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Caitra","lunar_month_amanta":"Caitra","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Caitra Śukla Trayodaśī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"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":"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":[]},"validity":{"eternal":false,"location_specific":"rameshwaram"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga April 17, 1981 CE · Rāmeśvaram · Vidhyamitra","description":"April 17, 1981 CE for Rāmeśvaram: Śukla Trayodaśī, sūryodaya 06:02, sūryāsta 18:23.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rameshwaram/1981-04-17","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rameshwaram/1981-04-17","sa":"https://sa.vidhyamitra.com/city/rameshwaram/1981-04-17","hi":"https://hi.vidhyamitra.com/city/rameshwaram/1981-04-17","x-default":"https://vidhyamitra.com/city/rameshwaram/1981-04-17"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T22:35:32.986Z","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":"2026-06-02T22:35:32.986Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T22:35:32.986Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}