{"id":"vidhyamitra:city-day:rishikesh:1981-01-27:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1981-01-27","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-01-27","date_display":"January 27, 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":1,"day":27,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444631.770833,"kali_year":5082,"ahargana":1856166.2708,"sun":{"sidereal_longitude":283.4599,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":182.2068,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":22,"name":"Saptamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Saptamī","elongation_degrees":258.7469,"elapsed_within_tithi_degrees":6.7469},"nakshatra":{"number":14,"name":"Citrā","pada":3,"moon_longitude":182.2068,"elapsed_within_degrees":8.8734},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":105.6667},"karana":{"half_tithi_index":43,"name":"Bava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"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":1,"day":27,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444631.770833,"ahargana":1856166.2708,"kali_year":5082,"ayanamsa_lahiri":23.5886,"grahas":{"sun":{"sidereal_longitude":283.431147,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false},"moon":{"sidereal_longitude":181.06144700000004,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":3},"retrograde":false,"latitude":4.25},"mars":{"sidereal_longitude":298.08774700000004,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":300.386347,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":166.844647,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":3},"retrograde":false},"venus":{"sidereal_longitude":266.40974700000004,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":165.90464700000007,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":111.3785,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":291.3785,"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":1,"day":27,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444631.770833,"kali_year":5082,"ahargana":1856166.2708,"sun":{"sidereal_longitude":283.4599,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":182.2068,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":22,"name":"Saptamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Saptamī","elongation_degrees":258.7469,"elapsed_within_tithi_degrees":6.7469},"nakshatra":{"number":14,"name":"Citrā","pada":3,"moon_longitude":182.2068,"elapsed_within_degrees":8.8734},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":105.6667},"karana":{"half_tithi_index":43,"name":"Bava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.25,"elongation":101.253},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.25,"opposition_distance":78.747}},"eclipse_window_40days":[{"offset_days":-7,"type":"lunar","occurs":true,"moon_latitude":-1.332,"opposition_distance":1.776},{"offset_days":9,"type":"solar","occurs":true,"moon_latitude":-0.15,"elongation":0.162}]},"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":"07:10","sunsetLocal":"17:49","solarNoonLocal":"12:30","dayLengthHours":10.646006262006985,"dayLengthDisplay":"10 Hours 38 Mins 46 Secs","nightLengthDisplay":"13 Hours 21 Mins 14 Secs","moonriseLocal":"00:00","moonsetLocal":"11:21","rahuKala":{"name":"Rāhu Kāla","start":"15:09","end":"16:29","startHours":15.15640832394973,"endHours":16.487159106700606,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:50","end":"11:10","startHours":9.833405192946238,"endHours":11.164155975697112,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:30","end":"13:50","startHours":12.494906758447986,"endHours":13.825657541198858,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:39","end":"10:01","startHours":9.655971755246123,"endHours":10.010838630646354,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:37","end":"07:54","startHours":7.615487221694783,"endHours":7.899380722014969,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:08","end":"12:51","startHours":12.140039883047752,"endHours":12.84977363384822,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:45","end":"06:28","startHours":5.752436125843561,"endHours":6.462169876644027,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:17","end":"07:10","startHours":6.28473643894391,"endHours":7.171903627444492,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:16","end":"14:59","startHours":14.26924113544915,"endHours":14.978974886249615,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:37","end":"18:01","startHours":17.61790988945148,"endHours":18.017909889451477,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:49","end":"18:16","startHours":17.817909889451478,"endHours":18.26149348370177,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:34","end":"19:19","startHours":17.567909889451478,"endHours":19.317909889451478,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:08","end":"00:51","startHours":24.140039883047752,"endHours":24.84977363384822,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"07:10","end":"08:30","startHours":7.171903627444492,"endHours":8.502654410195365,"quality":"inauspicious"},{"name":"Udveg","start":"08:30","end":"09:50","startHours":8.502654410195365,"endHours":9.833405192946238,"quality":"inauspicious"},{"name":"Chala","start":"09:50","end":"11:10","startHours":9.833405192946238,"endHours":11.164155975697112,"quality":"neutral"},{"name":"Labha","start":"11:10","end":"12:30","startHours":11.164155975697112,"endHours":12.494906758447986,"quality":"auspicious"},{"name":"Amṛta","start":"12:30","end":"13:50","startHours":12.494906758447986,"endHours":13.825657541198858,"quality":"auspicious"},{"name":"Kāla","start":"13:50","end":"15:09","startHours":13.825657541198858,"endHours":15.15640832394973,"quality":"inauspicious"},{"name":"Śubha","start":"15:09","end":"16:29","startHours":15.15640832394973,"endHours":16.487159106700606,"quality":"auspicious"},{"name":"Roga","start":"16:29","end":"17:49","startHours":16.487159106700606,"endHours":17.817909889451478,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"17:49","end":"19:29","startHours":17.817909889451478,"endHours":19.487159106700606,"quality":"inauspicious"},{"name":"Śubha","start":"19:29","end":"21:09","startHours":19.487159106700606,"endHours":21.156408323949734,"quality":"auspicious"},{"name":"Roga","start":"21:09","end":"22:50","startHours":21.156408323949734,"endHours":22.825657541198858,"quality":"inauspicious"},{"name":"Udveg","start":"22:50","end":"00:30","startHours":22.825657541198858,"endHours":24.494906758447986,"quality":"inauspicious"},{"name":"Chala","start":"00:30","end":"02:10","startHours":24.494906758447986,"endHours":26.164155975697113,"quality":"neutral"},{"name":"Labha","start":"02:10","end":"03:50","startHours":26.164155975697113,"endHours":27.833405192946238,"quality":"auspicious"},{"name":"Amṛta","start":"03:50","end":"05:30","startHours":27.833405192946238,"endHours":29.502654410195365,"quality":"auspicious"},{"name":"Kāla","start":"05:30","end":"07:10","startHours":29.502654410195365,"endHours":31.171903627444493,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:10","end":"08:10","startHours":7.171903627444492,"endHours":8.171903627444493,"planetary_lord":"Mars"},{"name":"Hora 2","start":"08:10","end":"09:10","startHours":8.171903627444493,"endHours":9.171903627444493,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"09:10","end":"10:10","startHours":9.171903627444493,"endHours":10.171903627444493,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"10:10","end":"11:10","startHours":10.171903627444493,"endHours":11.171903627444493,"planetary_lord":"Moon"},{"name":"Hora 5","start":"11:10","end":"12:10","startHours":11.171903627444493,"endHours":12.171903627444493,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"12:10","end":"13:10","startHours":12.171903627444493,"endHours":13.171903627444493,"planetary_lord":"Venus"},{"name":"Hora 7","start":"13:10","end":"14:10","startHours":13.171903627444493,"endHours":14.171903627444493,"planetary_lord":"Sun"},{"name":"Hora 8","start":"14:10","end":"15:10","startHours":14.171903627444493,"endHours":15.171903627444493,"planetary_lord":"Mars"},{"name":"Hora 9","start":"15:10","end":"16:10","startHours":15.171903627444493,"endHours":16.171903627444493,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"16:10","end":"17:10","startHours":16.171903627444493,"endHours":17.171903627444493,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"17:10","end":"18:10","startHours":17.171903627444493,"endHours":18.171903627444493,"planetary_lord":"Moon"},{"name":"Hora 12","start":"18:10","end":"19:10","startHours":18.171903627444493,"endHours":19.171903627444493,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"19:10","end":"20:10","startHours":19.171903627444493,"endHours":20.171903627444493,"planetary_lord":"Venus"},{"name":"Hora 14","start":"20:10","end":"21:10","startHours":20.171903627444493,"endHours":21.171903627444493,"planetary_lord":"Sun"},{"name":"Hora 15","start":"21:10","end":"22:10","startHours":21.171903627444493,"endHours":22.171903627444493,"planetary_lord":"Mars"},{"name":"Hora 16","start":"22:10","end":"23:10","startHours":22.171903627444493,"endHours":23.171903627444493,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"23:10","end":"00:10","startHours":23.171903627444493,"endHours":24.171903627444493,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"00:10","end":"01:10","startHours":24.171903627444493,"endHours":25.171903627444493,"planetary_lord":"Moon"},{"name":"Hora 19","start":"01:10","end":"02:10","startHours":25.171903627444493,"endHours":26.171903627444493,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"02:10","end":"03:10","startHours":26.171903627444493,"endHours":27.171903627444493,"planetary_lord":"Venus"},{"name":"Hora 21","start":"03:10","end":"04:10","startHours":27.171903627444493,"endHours":28.171903627444493,"planetary_lord":"Sun"},{"name":"Hora 22","start":"04:10","end":"05:10","startHours":28.171903627444493,"endHours":29.171903627444493,"planetary_lord":"Mars"},{"name":"Hora 23","start":"05:10","end":"06:10","startHours":29.171903627444493,"endHours":30.171903627444493,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"06:10","end":"07:10","startHours":30.171903627444493,"endHours":31.171903627444493,"planetary_lord":"Saturn"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Maghā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Karka","Siṃha","Tulā","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Vṛścika","Makara","Kumbha"]},"dishaShool":"North (Uttara)","chandraVasa":"North","rahuVasa":"North","anandadiYoga":{"name":"Mausala","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":-18.51547348363063,"eotMinutes":-12.76480550687915,"ayanamsa":23.5886}},"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 Kṛṣṇa Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Kṛṣṇa Saptamī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"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}],"todays_walk":{"walk":{"id":"mangala-walk","name":"Maṅgala Walk","name_sanskrit":"मङ्गल यात्रा","type":"graha","description":"Right action + BG 2.31-38 (kṣatriya-dharma).","step_count":7,"url":"/walk/mangala-walk"},"reason":"Maṅgalavāra (Tuesday) — 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 January 27, 1981 CE · Ṛṣikeśa · Vidhyamitra","description":"January 27, 1981 CE for Ṛṣikeśa: Kṛṣṇa Saptamī, sūryodaya 07:10, sūryāsta 17:49.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1981-01-27","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1981-01-27","sa":"https://sa.vidhyamitra.com/city/rishikesh/1981-01-27","hi":"https://hi.vidhyamitra.com/city/rishikesh/1981-01-27","x-default":"https://vidhyamitra.com/city/rishikesh/1981-01-27"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T18:40:37.784Z","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":"2026-05-18T18:40:37.784Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T18:40:37.784Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}