{"id":"vidhyamitra:city-day:rishikesh:2026-10-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/2026-10-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2026-10-18","date_display":"October 18, 2026 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":2026,"month":10,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2461331.770833,"kali_year":5128,"ahargana":1872866.2708,"sun":{"sidereal_longitude":179.6558,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":265.1221,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":85.4663,"elapsed_within_tithi_degrees":1.4663},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4,"moon_longitude":265.1221,"elapsed_within_degrees":11.7888},"yoga":{"number":7,"name":"Sukarma","sum_longitude":84.7779},"karana":{"half_tithi_index":14,"name":"Viṣṭi"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"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":2026,"month":10,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2461331.770833,"ahargana":1872866.2708,"kali_year":5128,"ayanamsa_lahiri":24.2273,"grahas":{"sun":{"sidereal_longitude":180.44998399999997,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":263.55888400000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false,"latitude":-2.9748},"mars":{"sidereal_longitude":106.73188400000004,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":204.39438399999995,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":117.97358399999996,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":189.82028400000002,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":1},"retrograde":true},"saturn":{"sidereal_longitude":346.070784,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":306.5321,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":126.5321,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":2},"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":2026,"month":10,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2461331.770833,"kali_year":5128,"ahargana":1872866.2708,"sun":{"sidereal_longitude":179.6558,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":265.1221,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":85.4663,"elapsed_within_tithi_degrees":1.4663},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4,"moon_longitude":265.1221,"elapsed_within_degrees":11.7888},"yoga":{"number":7,"name":"Sukarma","sum_longitude":84.7779},"karana":{"half_tithi_index":14,"name":"Viṣṭi"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.975,"elongation":85.466},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.975,"opposition_distance":94.534}},"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":"06:20","sunsetLocal":"17:43","solarNoonLocal":"12:02","dayLengthHours":11.384169764785417,"dayLengthDisplay":"11 Hours 23 Mins 03 Secs","nightLengthDisplay":"12 Hours 36 Mins 57 Secs","moonriseLocal":"12:26","moonsetLocal":"22:42","rahuKala":{"name":"Rāhu Kāla","start":"16:18","end":"17:43","startHours":16.29462935840756,"endHours":17.717650579005735,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:02","end":"13:27","startHours":12.025565696613025,"endHours":13.448586917211204,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:52","end":"16:18","startHours":14.87160813780938,"endHours":16.29462935840756,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:59","end":"09:22","startHours":8.989787092670248,"endHours":9.369259418163097,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:48","end":"07:07","startHours":6.807821221086376,"endHours":7.111399081480654,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:39","end":"12:24","startHours":11.646093371120179,"endHours":12.405038022105872,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:49","end":"05:34","startHours":4.815591512248929,"endHours":5.574536163234623,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:23","end":"06:20","startHours":5.3848000004882,"endHours":6.333480814220318,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:55","end":"14:41","startHours":13.922927324077262,"endHours":14.681871975062958,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:31","end":"17:55","startHours":17.517650579005736,"endHours":17.917650579005734,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:43","end":"18:12","startHours":17.717650579005735,"endHours":18.191990985871794,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:28","end":"19:13","startHours":17.467650579005735,"endHours":19.217650579005735,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:39","end":"00:24","startHours":23.646093371120177,"endHours":24.405038022105874,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:20","end":"07:45","startHours":6.333480814220318,"endHours":7.756502034818495,"quality":"inauspicious"},{"name":"Chala","start":"07:45","end":"09:11","startHours":7.756502034818495,"endHours":9.179523255416672,"quality":"neutral"},{"name":"Labha","start":"09:11","end":"10:36","startHours":9.179523255416672,"endHours":10.602544476014849,"quality":"auspicious"},{"name":"Amṛta","start":"10:36","end":"12:02","startHours":10.602544476014849,"endHours":12.025565696613025,"quality":"auspicious"},{"name":"Kāla","start":"12:02","end":"13:27","startHours":12.025565696613025,"endHours":13.448586917211204,"quality":"inauspicious"},{"name":"Śubha","start":"13:27","end":"14:52","startHours":13.448586917211204,"endHours":14.87160813780938,"quality":"auspicious"},{"name":"Roga","start":"14:52","end":"16:18","startHours":14.87160813780938,"endHours":16.29462935840756,"quality":"inauspicious"},{"name":"Udveg","start":"16:18","end":"17:43","startHours":16.29462935840756,"endHours":17.717650579005735,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"17:43","end":"19:18","startHours":17.717650579005735,"endHours":19.29462935840756,"quality":"auspicious"},{"name":"Roga","start":"19:18","end":"20:52","startHours":19.29462935840756,"endHours":20.871608137809382,"quality":"inauspicious"},{"name":"Udveg","start":"20:52","end":"22:27","startHours":20.871608137809382,"endHours":22.448586917211202,"quality":"inauspicious"},{"name":"Chala","start":"22:27","end":"00:02","startHours":22.448586917211202,"endHours":24.025565696613025,"quality":"neutral"},{"name":"Labha","start":"00:02","end":"01:36","startHours":24.025565696613025,"endHours":25.60254447601485,"quality":"auspicious"},{"name":"Amṛta","start":"01:36","end":"03:11","startHours":25.60254447601485,"endHours":27.179523255416672,"quality":"auspicious"},{"name":"Kāla","start":"03:11","end":"04:45","startHours":27.179523255416672,"endHours":28.756502034818496,"quality":"inauspicious"},{"name":"Śubha","start":"04:45","end":"06:20","startHours":28.756502034818496,"endHours":30.333480814220316,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:20","end":"07:20","startHours":6.333480814220318,"endHours":7.333480814220318,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:20","end":"08:20","startHours":7.333480814220318,"endHours":8.333480814220318,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:20","end":"09:20","startHours":8.333480814220318,"endHours":9.333480814220318,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:20","end":"10:20","startHours":9.333480814220318,"endHours":10.333480814220318,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:20","end":"11:20","startHours":10.333480814220318,"endHours":11.333480814220318,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:20","end":"12:20","startHours":11.333480814220318,"endHours":12.333480814220318,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:20","end":"13:20","startHours":12.333480814220318,"endHours":13.333480814220318,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:20","end":"14:20","startHours":13.333480814220318,"endHours":14.333480814220318,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:20","end":"15:20","startHours":14.333480814220318,"endHours":15.333480814220318,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:20","end":"16:20","startHours":15.333480814220318,"endHours":16.333480814220316,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:20","end":"17:20","startHours":16.333480814220316,"endHours":17.333480814220316,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:20","end":"18:20","startHours":17.333480814220316,"endHours":18.333480814220316,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:20","end":"19:20","startHours":18.333480814220316,"endHours":19.333480814220316,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:20","end":"20:20","startHours":19.333480814220316,"endHours":20.333480814220316,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:20","end":"21:20","startHours":20.333480814220316,"endHours":21.333480814220316,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:20","end":"22:20","startHours":21.333480814220316,"endHours":22.333480814220316,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:20","end":"23:20","startHours":22.333480814220316,"endHours":23.333480814220316,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:20","end":"00:20","startHours":23.333480814220316,"endHours":24.333480814220316,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:20","end":"01:20","startHours":24.333480814220316,"endHours":25.333480814220316,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:20","end":"02:20","startHours":25.333480814220316,"endHours":26.333480814220316,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:20","end":"03:20","startHours":26.333480814220316,"endHours":27.333480814220316,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:20","end":"04:20","startHours":27.333480814220316,"endHours":28.333480814220316,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:20","end":"05:20","startHours":28.333480814220316,"endHours":29.333480814220316,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:20","end":"06:20","startHours":29.333480814220316,"endHours":30.333480814220316,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Uttara Phalgunī","Hasta","Citrā","Svātī","Viśākhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Tulā","Dhanu","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Makara","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"East","rahuVasa":"North-East","anandadiYoga":{"name":"Śubha","quality":"Auspicious"},"drikRitu":"Śarad (Autumn)","vedicRitu":"Śarad (Autumn)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-9.558586610199995,"eotMinutes":15.395658203218455,"ayanamsa":24.2273}},"calendars":{"vikram_samvat":2083,"vikram_samvatsara":"Siddhārthī","saka_samvat":1948,"saka_samvatsara":"Parābhava","bengali_samvat":1433,"malayalam_era":1202,"nanakshahi_year":557,"lunar_month":"Kārtika","lunar_month_paksha_full":"Kārtika Śukla Pakṣa","solar_month":"Tulā (Aippasi)","ritu":"Śarad (Autumn)","display_summary":"Kārtika Śukla Aṣṭamī · Vikram 2083 Siddhārthī · Śaka 1948 Parābhava"},"festivals":[{"id":"tula-sankranti","name":"Tulā Saṅkrānti","name_sanskrit":"तुला सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Libra.","vrata":false,"detection":{"sun_rashi":"Tulā"},"precedence":5}],"todays_walk":{"walk":{"id":"surya-walk","name":"Sūrya Walk","name_sanskrit":"सूर्य यात्रा","type":"graha","description":"Self-illumination + BG 4.1 (Sun-lineage of Gītā transmission).","step_count":6,"url":"/walk/surya-walk"},"reason":"Ravivāra (Sunday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3137-12-25","event":"Bhīṣma's Mahaprasthan","chart_id":"bhishma","shared_marker":"same Śukla Aṣṭamī","url":"/day/-3137-12-25","relevance":0.5}]},"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 October 18, 2026 CE · Ṛṣikeśa · Vidhyamitra","description":"October 18, 2026 CE for Ṛṣikeśa: Śukla Aṣṭamī, sūryodaya 06:20, sūryāsta 17:43.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/2026-10-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/2026-10-18","sa":"https://sa.vidhyamitra.com/city/rishikesh/2026-10-18","hi":"https://hi.vidhyamitra.com/city/rishikesh/2026-10-18","x-default":"https://vidhyamitra.com/city/rishikesh/2026-10-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T19:51:21.165Z","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":"2026-05-14T19:51:21.165Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T19:51:21.165Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}