{"id":"vidhyamitra:city-day:rishikesh:1998-05-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1998-05-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1998-05-18","date_display":"May 18, 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":5,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2450951.770833,"kali_year":5100,"ahargana":1862486.2708,"sun":{"sidereal_longitude":33.0573,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":291.3425,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":22,"name":"Saptamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Saptamī","elongation_degrees":258.2852,"elapsed_within_tithi_degrees":6.2852},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4,"moon_longitude":291.3425,"elapsed_within_degrees":11.3425},"yoga":{"number":25,"name":"Brahma","sum_longitude":324.3998},"karana":{"half_tithi_index":43,"name":"Bava"},"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":5,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2450951.770833,"ahargana":1862486.2708,"kali_year":5100,"ayanamsa_lahiri":23.8303,"grahas":{"sun":{"sidereal_longitude":33.08747599999998,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":288.62857600000007,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false,"latitude":1.9124},"mars":{"sidereal_longitude":31.858176000000014,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":10.355575999999985,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":328.75047600000005,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":3},"retrograde":false},"venus":{"sidereal_longitude":352.416376,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":3.7571760000000154,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":136.5145,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":316.5145,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","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":1998,"month":5,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2450951.770833,"kali_year":5100,"ahargana":1862486.2708,"sun":{"sidereal_longitude":33.0573,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":291.3425,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":22,"name":"Saptamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Saptamī","elongation_degrees":258.2852,"elapsed_within_tithi_degrees":6.2852},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4,"moon_longitude":291.3425,"elapsed_within_degrees":11.3425},"yoga":{"number":25,"name":"Brahma","sum_longitude":324.3998},"karana":{"half_tithi_index":43,"name":"Bava"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.912,"elongation":101.715},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.912,"opposition_distance":78.285}},"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":"05:22","sunsetLocal":"19:05","solarNoonLocal":"12:13","dayLengthHours":13.714954994146243,"dayLengthDisplay":"13 Hours 42 Mins 54 Secs","nightLengthDisplay":"10 Hours 17 Mins 06 Secs","moonriseLocal":"23:54","moonsetLocal":"10:37","rahuKala":{"name":"Rāhu Kāla","start":"07:05","end":"08:48","startHours":7.077565507353999,"endHours":8.791934881622279,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:30","end":"12:13","startHours":10.506304255890559,"endHours":12.220673630158839,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:56","end":"15:39","startHours":13.935043004427119,"endHours":15.649412378695402,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:34","end":"09:01","startHours":8.563352298386508,"endHours":9.020517464858049,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:56","end":"06:18","startHours":5.934652591175144,"endHours":6.300384724352377,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:46","end":"12:41","startHours":11.763508463687298,"endHours":12.677838796630382,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:32","end":"04:27","startHours":3.534535467199552,"endHours":4.448865800142635,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:13","end":"05:22","startHours":4.220283216906864,"endHours":5.363196133085718,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:30","end":"15:25","startHours":14.506499462516548,"endHours":15.42082979545963,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:53","end":"19:17","startHours":18.878151127231963,"endHours":19.27815112723196,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:05","end":"19:39","startHours":19.078151127231962,"endHours":19.649607585321387,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:50","end":"20:35","startHours":18.828151127231962,"endHours":20.578151127231962,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:46","end":"00:41","startHours":23.7635084636873,"endHours":24.677838796630382,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"05:22","end":"07:05","startHours":5.363196133085718,"endHours":7.077565507353999,"quality":"auspicious"},{"name":"Kāla","start":"07:05","end":"08:48","startHours":7.077565507353999,"endHours":8.791934881622279,"quality":"inauspicious"},{"name":"Śubha","start":"08:48","end":"10:30","startHours":8.791934881622279,"endHours":10.506304255890559,"quality":"auspicious"},{"name":"Roga","start":"10:30","end":"12:13","startHours":10.506304255890559,"endHours":12.220673630158839,"quality":"inauspicious"},{"name":"Udveg","start":"12:13","end":"13:56","startHours":12.220673630158839,"endHours":13.935043004427119,"quality":"inauspicious"},{"name":"Chala","start":"13:56","end":"15:39","startHours":13.935043004427119,"endHours":15.649412378695402,"quality":"neutral"},{"name":"Labha","start":"15:39","end":"17:22","startHours":15.649412378695402,"endHours":17.363781752963682,"quality":"auspicious"},{"name":"Amṛta","start":"17:22","end":"19:05","startHours":17.363781752963682,"endHours":19.078151127231962,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"19:05","end":"20:22","startHours":19.078151127231962,"endHours":20.363781752963682,"quality":"neutral"},{"name":"Labha","start":"20:22","end":"21:39","startHours":20.363781752963682,"endHours":21.649412378695402,"quality":"auspicious"},{"name":"Amṛta","start":"21:39","end":"22:56","startHours":21.649412378695402,"endHours":22.935043004427122,"quality":"auspicious"},{"name":"Kāla","start":"22:56","end":"00:13","startHours":22.935043004427122,"endHours":24.220673630158842,"quality":"inauspicious"},{"name":"Śubha","start":"00:13","end":"01:30","startHours":24.220673630158842,"endHours":25.506304255890562,"quality":"auspicious"},{"name":"Roga","start":"01:30","end":"02:48","startHours":25.506304255890562,"endHours":26.79193488162228,"quality":"inauspicious"},{"name":"Udveg","start":"02:48","end":"04:05","startHours":26.79193488162228,"endHours":28.077565507354,"quality":"inauspicious"},{"name":"Chala","start":"04:05","end":"05:22","startHours":28.077565507354,"endHours":29.36319613308572,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"05:22","end":"06:22","startHours":5.363196133085718,"endHours":6.363196133085718,"planetary_lord":"Moon"},{"name":"Hora 2","start":"06:22","end":"07:22","startHours":6.363196133085718,"endHours":7.363196133085718,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"07:22","end":"08:22","startHours":7.363196133085718,"endHours":8.363196133085719,"planetary_lord":"Venus"},{"name":"Hora 4","start":"08:22","end":"09:22","startHours":8.363196133085719,"endHours":9.363196133085719,"planetary_lord":"Sun"},{"name":"Hora 5","start":"09:22","end":"10:22","startHours":9.363196133085719,"endHours":10.363196133085719,"planetary_lord":"Mars"},{"name":"Hora 6","start":"10:22","end":"11:22","startHours":10.363196133085719,"endHours":11.363196133085719,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"11:22","end":"12:22","startHours":11.363196133085719,"endHours":12.363196133085719,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"12:22","end":"13:22","startHours":12.363196133085719,"endHours":13.363196133085719,"planetary_lord":"Moon"},{"name":"Hora 9","start":"13:22","end":"14:22","startHours":13.363196133085719,"endHours":14.363196133085719,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"14:22","end":"15:22","startHours":14.363196133085719,"endHours":15.363196133085719,"planetary_lord":"Venus"},{"name":"Hora 11","start":"15:22","end":"16:22","startHours":15.363196133085719,"endHours":16.36319613308572,"planetary_lord":"Sun"},{"name":"Hora 12","start":"16:22","end":"17:22","startHours":16.36319613308572,"endHours":17.36319613308572,"planetary_lord":"Mars"},{"name":"Hora 13","start":"17:22","end":"18:22","startHours":17.36319613308572,"endHours":18.36319613308572,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"18:22","end":"19:22","startHours":18.36319613308572,"endHours":19.36319613308572,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"19:22","end":"20:22","startHours":19.36319613308572,"endHours":20.36319613308572,"planetary_lord":"Moon"},{"name":"Hora 16","start":"20:22","end":"21:22","startHours":20.36319613308572,"endHours":21.36319613308572,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"21:22","end":"22:22","startHours":21.36319613308572,"endHours":22.36319613308572,"planetary_lord":"Venus"},{"name":"Hora 18","start":"22:22","end":"23:22","startHours":22.36319613308572,"endHours":23.36319613308572,"planetary_lord":"Sun"},{"name":"Hora 19","start":"23:22","end":"00:22","startHours":23.36319613308572,"endHours":24.36319613308572,"planetary_lord":"Mars"},{"name":"Hora 20","start":"00:22","end":"01:22","startHours":24.36319613308572,"endHours":25.36319613308572,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"01:22","end":"02:22","startHours":25.36319613308572,"endHours":26.36319613308572,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"02:22","end":"03:22","startHours":26.36319613308572,"endHours":27.36319613308572,"planetary_lord":"Moon"},{"name":"Hora 23","start":"03:22","end":"04:22","startHours":27.36319613308572,"endHours":28.36319613308572,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"04:22","end":"05:22","startHours":28.36319613308572,"endHours":29.36319613308572,"planetary_lord":"Venus"}],"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":["Mithuna","Karka","Tulā","Vṛścika","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Dhanu","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"South-East","rahuVasa":"North-East","anandadiYoga":{"name":"Cara","quality":"Auspicious"},"drikRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":19.46647838510963,"eotMinutes":3.6891821904695723,"ayanamsa":23.8303}},"calendars":{"vikram_samvat":2055,"vikram_samvatsara":"Khara","saka_samvat":1920,"saka_samvatsara":"Bahudhānya","bengali_samvat":1405,"malayalam_era":1174,"nanakshahi_year":529,"lunar_month":"Jyeṣṭha","lunar_month_paksha_full":"Jyeṣṭha Kṛṣṇa Pakṣa","solar_month":"Vṛṣabha (Vaikāsi)","ritu":"Grīṣma (Summer)","display_summary":"Jyeṣṭha Kṛṣṇa Saptamī · Vikram 2055 Khara · Śaka 1920 Bahudhānya"},"festivals":[{"id":"vrishabha-sankranti","name":"Vṛṣabha Saṅkrānti","name_sanskrit":"वृषभ सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Taurus.","vrata":false,"detection":{"sun_rashi":"Vṛṣabha"},"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 May 18, 1998 CE · Ṛṣikeśa · Vidhyamitra","description":"May 18, 1998 CE for Ṛṣikeśa: Kṛṣṇa Saptamī, sūryodaya 05:22, sūryāsta 19:05.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1998-05-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1998-05-18","sa":"https://sa.vidhyamitra.com/city/rishikesh/1998-05-18","hi":"https://hi.vidhyamitra.com/city/rishikesh/1998-05-18","x-default":"https://vidhyamitra.com/city/rishikesh/1998-05-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-17T11:44:28.761Z","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":"2026-05-17T11:44:28.761Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-17T11:44:28.761Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}