{"id":"vidhyamitra:city-day:rishikesh:1998-02-07:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1998-02-07","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1998-02-07","date_display":"February 7, 1998 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":1998,"month":2,"day":7,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2450851.770833,"kali_year":5099,"ahargana":1862386.2708,"sun":{"sidereal_longitude":294.2882,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":61.8804,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":127.5922,"elapsed_within_tithi_degrees":7.5922},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":3,"moon_longitude":61.8804,"elapsed_within_degrees":8.547},"yoga":{"number":27,"name":"Vaidhṛti","sum_longitude":356.1686},"karana":{"half_tithi_index":21,"name":"Viṣṭi"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"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":1998,"month":2,"day":7,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2450851.770833,"ahargana":1862386.2708,"kali_year":5099,"ayanamsa_lahiri":23.8265,"grahas":{"sun":{"sidereal_longitude":294.228697,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":62.856596999999965,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":3},"retrograde":false,"latitude":-4.4306},"mars":{"sidereal_longitude":316.16279699999996,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":283.30329699999993,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":306.774997,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":264.543897,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":352.089597,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":141.8129,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":321.8129,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","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":1998,"month":2,"day":7,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2450851.770833,"kali_year":5099,"ahargana":1862386.2708,"sun":{"sidereal_longitude":294.2882,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":61.8804,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":127.5922,"elapsed_within_tithi_degrees":7.5922},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":3,"moon_longitude":61.8804,"elapsed_within_degrees":8.547},"yoga":{"number":27,"name":"Vaidhṛti","sum_longitude":356.1686},"karana":{"half_tithi_index":21,"name":"Viṣṭi"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.431,"elongation":127.592},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.431,"opposition_distance":52.408}},"eclipse_window_40days":[{"offset_days":20,"type":"solar","occurs":true,"moon_latitude":0.255,"elongation":2.931}]},"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":"07:04","sunsetLocal":"17:59","solarNoonLocal":"12:31","dayLengthHours":10.908840324665084,"dayLengthDisplay":"10 Hours 54 Mins 32 Secs","nightLengthDisplay":"13 Hours 05 Mins 28 Secs","moonriseLocal":"14:05","moonsetLocal":"04:07","rahuKala":{"name":"Rāhu Kāla","start":"09:48","end":"11:09","startHours":9.794577460656509,"endHours":11.158182501239644,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:53","end":"15:15","startHours":13.885392582405915,"endHours":15.24899762298905,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:04","end":"08:26","startHours":7.067367379490237,"endHours":8.430972420073372,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:37","end":"09:59","startHours":9.612763455245425,"endHours":9.976391466067593,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:31","end":"07:49","startHours":7.52190239301795,"endHours":7.812804801675685,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:09","end":"12:53","startHours":12.158159531000608,"endHours":12.885415552644949,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:37","end":"06:20","startHours":5.61285533620156,"endHours":6.340111357845899,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:09","end":"07:04","startHours":6.158297352434814,"endHours":7.067367379490237,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:20","end":"15:04","startHours":14.339927595933627,"endHours":15.067183617577966,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:47","end":"18:11","startHours":17.776207704155322,"endHours":18.17620770415532,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:59","end":"18:26","startHours":17.97620770415532,"endHours":18.43074271768303,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:44","end":"19:29","startHours":17.72620770415532,"endHours":19.47620770415532,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:09","end":"00:53","startHours":24.15815953100061,"endHours":24.885415552644947,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"07:04","end":"08:26","startHours":7.067367379490237,"endHours":8.430972420073372,"quality":"inauspicious"},{"name":"Śubha","start":"08:26","end":"09:48","startHours":8.430972420073372,"endHours":9.794577460656509,"quality":"auspicious"},{"name":"Roga","start":"09:48","end":"11:09","startHours":9.794577460656509,"endHours":11.158182501239644,"quality":"inauspicious"},{"name":"Udveg","start":"11:09","end":"12:31","startHours":11.158182501239644,"endHours":12.521787541822778,"quality":"inauspicious"},{"name":"Chala","start":"12:31","end":"13:53","startHours":12.521787541822778,"endHours":13.885392582405915,"quality":"neutral"},{"name":"Labha","start":"13:53","end":"15:15","startHours":13.885392582405915,"endHours":15.24899762298905,"quality":"auspicious"},{"name":"Amṛta","start":"15:15","end":"16:37","startHours":15.24899762298905,"endHours":16.612602663572186,"quality":"auspicious"},{"name":"Kāla","start":"16:37","end":"17:59","startHours":16.612602663572186,"endHours":17.97620770415532,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"17:59","end":"19:37","startHours":17.97620770415532,"endHours":19.612602663572186,"quality":"auspicious"},{"name":"Amṛta","start":"19:37","end":"21:15","startHours":19.612602663572186,"endHours":21.24899762298905,"quality":"auspicious"},{"name":"Kāla","start":"21:15","end":"22:53","startHours":21.24899762298905,"endHours":22.885392582405913,"quality":"inauspicious"},{"name":"Śubha","start":"22:53","end":"00:31","startHours":22.885392582405913,"endHours":24.52178754182278,"quality":"auspicious"},{"name":"Roga","start":"00:31","end":"02:09","startHours":24.52178754182278,"endHours":26.158182501239644,"quality":"inauspicious"},{"name":"Udveg","start":"02:09","end":"03:48","startHours":26.158182501239644,"endHours":27.79457746065651,"quality":"inauspicious"},{"name":"Chala","start":"03:48","end":"05:26","startHours":27.79457746065651,"endHours":29.430972420073374,"quality":"neutral"},{"name":"Labha","start":"05:26","end":"07:04","startHours":29.430972420073374,"endHours":31.067367379490236,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:04","end":"08:04","startHours":7.067367379490237,"endHours":8.067367379490237,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"08:04","end":"09:04","startHours":8.067367379490237,"endHours":9.067367379490237,"planetary_lord":"Moon"},{"name":"Hora 3","start":"09:04","end":"10:04","startHours":9.067367379490237,"endHours":10.067367379490237,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"10:04","end":"11:04","startHours":10.067367379490237,"endHours":11.067367379490237,"planetary_lord":"Venus"},{"name":"Hora 5","start":"11:04","end":"12:04","startHours":11.067367379490237,"endHours":12.067367379490237,"planetary_lord":"Sun"},{"name":"Hora 6","start":"12:04","end":"13:04","startHours":12.067367379490237,"endHours":13.067367379490237,"planetary_lord":"Mars"},{"name":"Hora 7","start":"13:04","end":"14:04","startHours":13.067367379490237,"endHours":14.067367379490237,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"14:04","end":"15:04","startHours":14.067367379490237,"endHours":15.067367379490237,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"15:04","end":"16:04","startHours":15.067367379490237,"endHours":16.067367379490236,"planetary_lord":"Moon"},{"name":"Hora 10","start":"16:04","end":"17:04","startHours":16.067367379490236,"endHours":17.067367379490236,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"17:04","end":"18:04","startHours":17.067367379490236,"endHours":18.067367379490236,"planetary_lord":"Venus"},{"name":"Hora 12","start":"18:04","end":"19:04","startHours":18.067367379490236,"endHours":19.067367379490236,"planetary_lord":"Sun"},{"name":"Hora 13","start":"19:04","end":"20:04","startHours":19.067367379490236,"endHours":20.067367379490236,"planetary_lord":"Mars"},{"name":"Hora 14","start":"20:04","end":"21:04","startHours":20.067367379490236,"endHours":21.067367379490236,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"21:04","end":"22:04","startHours":21.067367379490236,"endHours":22.067367379490236,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"22:04","end":"23:04","startHours":22.067367379490236,"endHours":23.067367379490236,"planetary_lord":"Moon"},{"name":"Hora 17","start":"23:04","end":"00:04","startHours":23.067367379490236,"endHours":24.067367379490236,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"00:04","end":"01:04","startHours":24.067367379490236,"endHours":25.067367379490236,"planetary_lord":"Venus"},{"name":"Hora 19","start":"01:04","end":"02:04","startHours":25.067367379490236,"endHours":26.067367379490236,"planetary_lord":"Sun"},{"name":"Hora 20","start":"02:04","end":"03:04","startHours":26.067367379490236,"endHours":27.067367379490236,"planetary_lord":"Mars"},{"name":"Hora 21","start":"03:04","end":"04:04","startHours":27.067367379490236,"endHours":28.067367379490236,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"04:04","end":"05:04","startHours":28.067367379490236,"endHours":29.067367379490236,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"05:04","end":"06:04","startHours":29.067367379490236,"endHours":30.067367379490236,"planetary_lord":"Moon"},{"name":"Hora 24","start":"06:04","end":"07:04","startHours":30.067367379490236,"endHours":31.067367379490236,"planetary_lord":"Mercury"}],"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","Mithuna","Siṃha","Vṛścika","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Karka","Kanyā","Tulā","Makara","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"South","rahuVasa":"East","anandadiYoga":{"name":"Ānanda","quality":"Auspicious"},"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":-15.417471612202094,"eotMinutes":-14.37765250936663,"ayanamsa":23.8265}},"calendars":{"vikram_samvat":2055,"vikram_samvatsara":"Khara","saka_samvat":1920,"saka_samvatsara":"Bahudhānya","bengali_samvat":1405,"malayalam_era":1174,"nanakshahi_year":529,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Śukla Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Śukla Ekādaśī · Vikram 2055 Khara · Śaka 1920 Bahudhānya"},"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},{"id":"jaya-ekadashi","name":"Jayā Ekādaśī","name_sanskrit":"जया एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Removes pretatva (ghost-state); grants victory.","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Māgha"},"precedence":4},{"id":"ekadashi","name":"Ekādaśī","name_sanskrit":"एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Sacred to Bhagavān Viṣṇu; vrata for purification.","vrata":true,"detection":{"any_of":[{"tithi_number":11},{"tithi_number":26}]},"precedence":5}],"todays_walk":{"walk":{"id":"shani-walk","name":"Śani Walk","name_sanskrit":"शनि यात्रा","type":"graha","description":"Tapas + endurance + BG 17.14-19.","step_count":7,"url":"/walk/shani-walk"},"reason":"Śanivāra (Saturday) — 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 7, 1998 CE · Ṛṣikeśa · Vidhyamitra","description":"February 7, 1998 CE for Ṛṣikeśa: Śukla Ekādaśī, sūryodaya 07:04, sūryāsta 17:59.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1998-02-07","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1998-02-07","sa":"https://sa.vidhyamitra.com/city/rishikesh/1998-02-07","hi":"https://hi.vidhyamitra.com/city/rishikesh/1998-02-07","x-default":"https://vidhyamitra.com/city/rishikesh/1998-02-07"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-17T02:11:10.211Z","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":"2026-05-17T02:11:10.211Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-17T02:11:10.211Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}