{"id":"vidhyamitra:city-day:rishikesh:1998-04-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1998-04-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1998-04-13","date_display":"April 13, 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":4,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2450916.770833,"kali_year":5099,"ahargana":1862451.2708,"sun":{"sidereal_longitude":359.2328,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":193.1467,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":17,"name":"Dvitīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvitīyā","elongation_degrees":193.9139,"elapsed_within_tithi_degrees":1.9139},"nakshatra":{"number":15,"name":"Svātī","pada":2,"moon_longitude":193.1467,"elapsed_within_degrees":6.48},"yoga":{"number":15,"name":"Vajra","sum_longitude":192.3794},"karana":{"half_tithi_index":32,"name":"Taitila"},"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":1998,"month":4,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2450916.770833,"ahargana":1862451.2708,"kali_year":5099,"ayanamsa_lahiri":23.829,"grahas":{"sun":{"sidereal_longitude":359.091513,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"moon":{"sidereal_longitude":191.15211299999999,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":2},"retrograde":false,"latitude":3.6749},"mars":{"sidereal_longitude":6.217812999999978,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":348.371813,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":1},"retrograde":true},"jupiter":{"sidereal_longitude":322.00951299999997,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":313.365813,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":359.449813,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":138.3689,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":318.3689,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","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":1998,"month":4,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2450916.770833,"kali_year":5099,"ahargana":1862451.2708,"sun":{"sidereal_longitude":359.2328,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":193.1467,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":17,"name":"Dvitīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvitīyā","elongation_degrees":193.9139,"elapsed_within_tithi_degrees":1.9139},"nakshatra":{"number":15,"name":"Svātī","pada":2,"moon_longitude":193.1467,"elapsed_within_degrees":6.48},"yoga":{"number":15,"name":"Vajra","sum_longitude":192.3794},"karana":{"half_tithi_index":32,"name":"Taitila"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.675,"elongation":166.086},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.675,"opposition_distance":13.914}},"eclipse_window_40days":[]},"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":"05:53","sunsetLocal":"18:42","solarNoonLocal":"12:18","dayLengthHours":12.825501178948265,"dayLengthDisplay":"12 Hours 49 Mins 32 Secs","nightLengthDisplay":"11 Hours 10 Mins 28 Secs","moonriseLocal":"19:34","moonsetLocal":"06:38","rahuKala":{"name":"Rāhu Kāla","start":"07:29","end":"09:05","startHours":7.485427238389474,"endHours":9.088614885758007,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:42","end":"12:18","startHours":10.691802533126541,"endHours":12.294990180495073,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:54","end":"15:30","startHours":13.898177827863606,"endHours":15.50136547523214,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:52","end":"09:18","startHours":8.874856532775535,"endHours":9.30237323874048,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:25","end":"06:46","startHours":6.416635473477118,"endHours":6.758648838249072,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:52","end":"12:43","startHours":11.867473474530131,"endHours":12.722506886460016,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:10","end":"05:02","startHours":4.172172767161172,"endHours":5.027206179091056,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:49","end":"05:53","startHours":4.813447826108585,"endHours":5.882239591020941,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:26","end":"15:17","startHours":14.432573710319785,"endHours":15.28760712224967,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:30","end":"18:54","startHours":18.507740769969207,"endHours":18.907740769969205,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:42","end":"19:15","startHours":18.707740769969206,"endHours":19.242136652425383,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:27","end":"20:12","startHours":18.457740769969206,"endHours":20.207740769969206,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:52","end":"00:43","startHours":23.867473474530133,"endHours":24.722506886460014,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"05:53","end":"07:29","startHours":5.882239591020941,"endHours":7.485427238389474,"quality":"auspicious"},{"name":"Kāla","start":"07:29","end":"09:05","startHours":7.485427238389474,"endHours":9.088614885758007,"quality":"inauspicious"},{"name":"Śubha","start":"09:05","end":"10:42","startHours":9.088614885758007,"endHours":10.691802533126541,"quality":"auspicious"},{"name":"Roga","start":"10:42","end":"12:18","startHours":10.691802533126541,"endHours":12.294990180495073,"quality":"inauspicious"},{"name":"Udveg","start":"12:18","end":"13:54","startHours":12.294990180495073,"endHours":13.898177827863606,"quality":"inauspicious"},{"name":"Chala","start":"13:54","end":"15:30","startHours":13.898177827863606,"endHours":15.50136547523214,"quality":"neutral"},{"name":"Labha","start":"15:30","end":"17:06","startHours":15.50136547523214,"endHours":17.104553122600674,"quality":"auspicious"},{"name":"Amṛta","start":"17:06","end":"18:42","startHours":17.104553122600674,"endHours":18.707740769969206,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"18:42","end":"20:06","startHours":18.707740769969206,"endHours":20.104553122600674,"quality":"neutral"},{"name":"Labha","start":"20:06","end":"21:30","startHours":20.104553122600674,"endHours":21.50136547523214,"quality":"auspicious"},{"name":"Amṛta","start":"21:30","end":"22:54","startHours":21.50136547523214,"endHours":22.898177827863606,"quality":"auspicious"},{"name":"Kāla","start":"22:54","end":"00:18","startHours":22.898177827863606,"endHours":24.294990180495073,"quality":"inauspicious"},{"name":"Śubha","start":"00:18","end":"01:42","startHours":24.294990180495073,"endHours":25.69180253312654,"quality":"auspicious"},{"name":"Roga","start":"01:42","end":"03:05","startHours":25.69180253312654,"endHours":27.088614885758005,"quality":"inauspicious"},{"name":"Udveg","start":"03:05","end":"04:29","startHours":27.088614885758005,"endHours":28.485427238389473,"quality":"inauspicious"},{"name":"Chala","start":"04:29","end":"05:53","startHours":28.485427238389473,"endHours":29.88223959102094,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"05:53","end":"06:53","startHours":5.882239591020941,"endHours":6.882239591020941,"planetary_lord":"Moon"},{"name":"Hora 2","start":"06:53","end":"07:53","startHours":6.882239591020941,"endHours":7.882239591020941,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"07:53","end":"08:53","startHours":7.882239591020941,"endHours":8.88223959102094,"planetary_lord":"Venus"},{"name":"Hora 4","start":"08:53","end":"09:53","startHours":8.88223959102094,"endHours":9.88223959102094,"planetary_lord":"Sun"},{"name":"Hora 5","start":"09:53","end":"10:53","startHours":9.88223959102094,"endHours":10.88223959102094,"planetary_lord":"Mars"},{"name":"Hora 6","start":"10:53","end":"11:53","startHours":10.88223959102094,"endHours":11.88223959102094,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"11:53","end":"12:53","startHours":11.88223959102094,"endHours":12.88223959102094,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"12:53","end":"13:53","startHours":12.88223959102094,"endHours":13.88223959102094,"planetary_lord":"Moon"},{"name":"Hora 9","start":"13:53","end":"14:53","startHours":13.88223959102094,"endHours":14.88223959102094,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"14:53","end":"15:53","startHours":14.88223959102094,"endHours":15.88223959102094,"planetary_lord":"Venus"},{"name":"Hora 11","start":"15:53","end":"16:53","startHours":15.88223959102094,"endHours":16.88223959102094,"planetary_lord":"Sun"},{"name":"Hora 12","start":"16:53","end":"17:53","startHours":16.88223959102094,"endHours":17.88223959102094,"planetary_lord":"Mars"},{"name":"Hora 13","start":"17:53","end":"18:53","startHours":17.88223959102094,"endHours":18.88223959102094,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"18:53","end":"19:53","startHours":18.88223959102094,"endHours":19.88223959102094,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"19:53","end":"20:53","startHours":19.88223959102094,"endHours":20.88223959102094,"planetary_lord":"Moon"},{"name":"Hora 16","start":"20:53","end":"21:53","startHours":20.88223959102094,"endHours":21.88223959102094,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"21:53","end":"22:53","startHours":21.88223959102094,"endHours":22.88223959102094,"planetary_lord":"Venus"},{"name":"Hora 18","start":"22:53","end":"23:53","startHours":22.88223959102094,"endHours":23.88223959102094,"planetary_lord":"Sun"},{"name":"Hora 19","start":"23:53","end":"00:53","startHours":23.88223959102094,"endHours":24.88223959102094,"planetary_lord":"Mars"},{"name":"Hora 20","start":"00:53","end":"01:53","startHours":24.88223959102094,"endHours":25.88223959102094,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"01:53","end":"02:53","startHours":25.88223959102094,"endHours":26.88223959102094,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"02:53","end":"03:53","startHours":26.88223959102094,"endHours":27.88223959102094,"planetary_lord":"Moon"},{"name":"Hora 23","start":"03:53","end":"04:53","startHours":27.88223959102094,"endHours":28.88223959102094,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"04:53","end":"05:53","startHours":28.88223959102094,"endHours":29.88223959102094,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Punarvasu","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Uttara Phalgunī","Hasta","Citrā","Svātī","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"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":"East (Pūrva)","chandraVasa":"North","rahuVasa":"North-East","anandadiYoga":{"name":"Siddhi","quality":"Auspicious"},"drikRitu":"Vasanta (Spring) (Drik)","vedicRitu":"Śiśira (Winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":8.910903228062644,"eotMinutes":-0.7698108297043191,"ayanamsa":23.829}},"calendars":{"vikram_samvat":2055,"vikram_samvatsara":"Khara","saka_samvat":1920,"saka_samvatsara":"Bahudhānya","bengali_samvat":1405,"malayalam_era":1174,"nanakshahi_year":529,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Kṛṣṇa Pakṣa","solar_month":"Mīna (Paṅkuṇi)","ritu":"Vasanta (Spring)","display_summary":"Caitra Kṛṣṇa Dvitīyā · Vikram 2055 Khara · Śaka 1920 Bahudhānya"},"festivals":[{"id":"mina-sankranti","name":"Mīna Saṅkrānti","name_sanskrit":"मीन सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Pisces; Mīna-māsa begins.","vrata":false,"detection":{"sun_rashi":"Mīna"},"precedence":5}],"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":"rishikesh"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga April 13, 1998 CE · Ṛṣikeśa · Vidhyamitra","description":"April 13, 1998 CE for Ṛṣikeśa: Kṛṣṇa Dvitīyā, sūryodaya 05:53, sūryāsta 18:42.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1998-04-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1998-04-13","sa":"https://sa.vidhyamitra.com/city/rishikesh/1998-04-13","hi":"https://hi.vidhyamitra.com/city/rishikesh/1998-04-13","x-default":"https://vidhyamitra.com/city/rishikesh/1998-04-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-17T03:45:24.309Z","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":"2026-05-17T03:45:24.309Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-17T03:45:24.309Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}