{"id":"vidhyamitra:city-day:rishikesh:1977-10-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1977-10-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1977-10-18","date_display":"October 18, 1977 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":1977,"month":10,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2443434.770833,"kali_year":5079,"ahargana":1854969.2708,"sun":{"sidereal_longitude":180.3314,"rashi":7,"rashi_name":"Tulā"},"moon":{"sidereal_longitude":248.2531,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":6,"name":"Ṣaṣṭhī","paksha":"Śukla","full_name":"Śukla Ṣaṣṭhī","elongation_degrees":67.9217,"elapsed_within_tithi_degrees":7.9217},"nakshatra":{"number":19,"name":"Mūla","pada":3,"moon_longitude":248.2531,"elapsed_within_degrees":8.2531},"yoga":{"number":6,"name":"Atigaṇḍa","sum_longitude":68.5845},"karana":{"half_tithi_index":11,"name":"Taitila"},"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":1977,"month":10,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2443434.770833,"ahargana":1854969.2708,"kali_year":5079,"ayanamsa_lahiri":23.5428,"grahas":{"sun":{"sidereal_longitude":181.006081,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":251.43778099999997,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":4},"retrograde":false,"latitude":4.3133},"mars":{"sidereal_longitude":92.84088099999997,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":7,"name":"Punarvasu","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":180.58888100000001,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":72.314481,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":157.99768100000006,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":124.34678099999996,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":174.8013,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":354.8013,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","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":1977,"month":10,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2443434.770833,"kali_year":5079,"ahargana":1854969.2708,"sun":{"sidereal_longitude":180.3314,"rashi":7,"rashi_name":"Tulā"},"moon":{"sidereal_longitude":248.2531,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":6,"name":"Ṣaṣṭhī","paksha":"Śukla","full_name":"Śukla Ṣaṣṭhī","elongation_degrees":67.9217,"elapsed_within_tithi_degrees":7.9217},"nakshatra":{"number":19,"name":"Mūla","pada":3,"moon_longitude":248.2531,"elapsed_within_degrees":8.2531},"yoga":{"number":6,"name":"Atigaṇḍa","sum_longitude":68.5845},"karana":{"half_tithi_index":11,"name":"Taitila"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.313,"elongation":67.922},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.313,"opposition_distance":112.078}},"eclipse_window_40days":[{"offset_days":-5,"type":"solar","occurs":true,"moon_latitude":0.112,"elongation":1.127},{"offset_days":9,"type":"lunar","occurs":true,"moon_latitude":-1.343,"opposition_distance":2.387}]},"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":11.387903415170001,"dayLengthDisplay":"11 Hours 23 Mins 16 Secs","nightLengthDisplay":"12 Hours 36 Mins 44 Secs","moonriseLocal":"11:38","moonsetLocal":"21:48","rahuKala":{"name":"Rāhu Kāla","start":"14:52","end":"16:18","startHours":14.872541550405526,"endHours":16.296029477301776,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:11","end":"10:36","startHours":9.178589842820525,"endHours":10.602077769716775,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:02","end":"13:27","startHours":12.025565696613025,"endHours":13.449053623509275,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:59","end":"09:22","startHours":8.988791452567693,"endHours":9.36838823307336,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:48","end":"07:07","startHours":6.806109964660109,"endHours":7.109787389064643,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:39","end":"12:24","startHours":11.645968916107359,"endHours":12.405162477118692,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:49","end":"05:34","startHours":4.813226867005358,"endHours":5.5724204280166925,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:23","end":"06:20","startHours":5.382622037763859,"endHours":6.331613989028026,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:55","end":"14:41","startHours":13.92354959914136,"endHours":14.682743160152693,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:31","end":"17:55","startHours":17.519517404198027,"endHours":17.919517404198025,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:43","end":"18:12","startHours":17.719517404198026,"endHours":18.19401337983011,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:28","end":"19:13","startHours":17.469517404198026,"endHours":19.219517404198026,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:39","end":"00:24","startHours":23.645968916107357,"endHours":24.405162477118694,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"06:20","end":"07:45","startHours":6.331613989028026,"endHours":7.755101915924276,"quality":"inauspicious"},{"name":"Udveg","start":"07:45","end":"09:11","startHours":7.755101915924276,"endHours":9.178589842820525,"quality":"inauspicious"},{"name":"Chala","start":"09:11","end":"10:36","startHours":9.178589842820525,"endHours":10.602077769716775,"quality":"neutral"},{"name":"Labha","start":"10:36","end":"12:02","startHours":10.602077769716775,"endHours":12.025565696613025,"quality":"auspicious"},{"name":"Amṛta","start":"12:02","end":"13:27","startHours":12.025565696613025,"endHours":13.449053623509275,"quality":"auspicious"},{"name":"Kāla","start":"13:27","end":"14:52","startHours":13.449053623509275,"endHours":14.872541550405526,"quality":"inauspicious"},{"name":"Śubha","start":"14:52","end":"16:18","startHours":14.872541550405526,"endHours":16.296029477301776,"quality":"auspicious"},{"name":"Roga","start":"16:18","end":"17:43","startHours":16.296029477301776,"endHours":17.719517404198026,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"17:43","end":"19:18","startHours":17.719517404198026,"endHours":19.296029477301776,"quality":"inauspicious"},{"name":"Śubha","start":"19:18","end":"20:52","startHours":19.296029477301776,"endHours":20.872541550405526,"quality":"auspicious"},{"name":"Roga","start":"20:52","end":"22:27","startHours":20.872541550405526,"endHours":22.449053623509275,"quality":"inauspicious"},{"name":"Udveg","start":"22:27","end":"00:02","startHours":22.449053623509275,"endHours":24.025565696613025,"quality":"inauspicious"},{"name":"Chala","start":"00:02","end":"01:36","startHours":24.025565696613025,"endHours":25.602077769716775,"quality":"neutral"},{"name":"Labha","start":"01:36","end":"03:11","startHours":25.602077769716775,"endHours":27.178589842820525,"quality":"auspicious"},{"name":"Amṛta","start":"03:11","end":"04:45","startHours":27.178589842820525,"endHours":28.755101915924275,"quality":"auspicious"},{"name":"Kāla","start":"04:45","end":"06:20","startHours":28.755101915924275,"endHours":30.331613989028025,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:20","end":"07:20","startHours":6.331613989028026,"endHours":7.331613989028026,"planetary_lord":"Mars"},{"name":"Hora 2","start":"07:20","end":"08:20","startHours":7.331613989028026,"endHours":8.331613989028025,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"08:20","end":"09:20","startHours":8.331613989028025,"endHours":9.331613989028025,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"09:20","end":"10:20","startHours":9.331613989028025,"endHours":10.331613989028025,"planetary_lord":"Moon"},{"name":"Hora 5","start":"10:20","end":"11:20","startHours":10.331613989028025,"endHours":11.331613989028025,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"11:20","end":"12:20","startHours":11.331613989028025,"endHours":12.331613989028025,"planetary_lord":"Venus"},{"name":"Hora 7","start":"12:20","end":"13:20","startHours":12.331613989028025,"endHours":13.331613989028025,"planetary_lord":"Sun"},{"name":"Hora 8","start":"13:20","end":"14:20","startHours":13.331613989028025,"endHours":14.331613989028025,"planetary_lord":"Mars"},{"name":"Hora 9","start":"14:20","end":"15:20","startHours":14.331613989028025,"endHours":15.331613989028025,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"15:20","end":"16:20","startHours":15.331613989028025,"endHours":16.331613989028025,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"16:20","end":"17:20","startHours":16.331613989028025,"endHours":17.331613989028025,"planetary_lord":"Moon"},{"name":"Hora 12","start":"17:20","end":"18:20","startHours":17.331613989028025,"endHours":18.331613989028025,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"18:20","end":"19:20","startHours":18.331613989028025,"endHours":19.331613989028025,"planetary_lord":"Venus"},{"name":"Hora 14","start":"19:20","end":"20:20","startHours":19.331613989028025,"endHours":20.331613989028025,"planetary_lord":"Sun"},{"name":"Hora 15","start":"20:20","end":"21:20","startHours":20.331613989028025,"endHours":21.331613989028025,"planetary_lord":"Mars"},{"name":"Hora 16","start":"21:20","end":"22:20","startHours":21.331613989028025,"endHours":22.331613989028025,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"22:20","end":"23:20","startHours":22.331613989028025,"endHours":23.331613989028025,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"23:20","end":"00:20","startHours":23.331613989028025,"endHours":24.331613989028025,"planetary_lord":"Moon"},{"name":"Hora 19","start":"00:20","end":"01:20","startHours":24.331613989028025,"endHours":25.331613989028025,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"01:20","end":"02:20","startHours":25.331613989028025,"endHours":26.331613989028025,"planetary_lord":"Venus"},{"name":"Hora 21","start":"02:20","end":"03:20","startHours":26.331613989028025,"endHours":27.331613989028025,"planetary_lord":"Sun"},{"name":"Hora 22","start":"03:20","end":"04:20","startHours":27.331613989028025,"endHours":28.331613989028025,"planetary_lord":"Mars"},{"name":"Hora 23","start":"04:20","end":"05:20","startHours":28.331613989028025,"endHours":29.331613989028025,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"05:20","end":"06:20","startHours":29.331613989028025,"endHours":30.331613989028025,"planetary_lord":"Saturn"}],"taraBala":{"favorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Svātī","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"unfavorable_nakshatras":["Aśvinī","Punarvasu","Puṣya","Aśleṣā","Maghā","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Bhādrapadā","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":"North (Uttara)","chandraVasa":"East","rahuVasa":"North","anandadiYoga":{"name":"Sushira","quality":"Auspicious"},"tropicalRitu":"Śarad (Autumn)","vedicRitu":"Śarad (Autumn)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-9.51150630877069,"eotMinutes":15.395658203218455,"ayanamsa":23.5428}},"calendars":{"vikram_samvat":2034,"vikram_samvatsara":"Pramoda","saka_samvat":1899,"saka_samvatsara":"Piṅgala","bengali_samvat":1384,"malayalam_era":1153,"nanakshahi_year":508,"lunar_month":"Āśvina","lunar_month_paksha_full":"Āśvina Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Āśvina","lunar_month_amanta":"Āśvina","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Tulā (Aippasi)","ritu":"Śarad (Autumn)","display_summary":"Āśvina Śukla Ṣaṣṭhī · Vikram 2034 Pramoda · Śaka 1899 Piṅgala"},"festivals":[],"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 October 18, 1977 CE · Ṛṣikeśa · Vidhyamitra","description":"October 18, 1977 CE for Ṛṣikeśa: Śukla Ṣaṣṭhī, sūryodaya 06:20, sūryāsta 17:43.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1977-10-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1977-10-18","sa":"https://sa.vidhyamitra.com/city/rishikesh/1977-10-18","hi":"https://hi.vidhyamitra.com/city/rishikesh/1977-10-18","x-default":"https://vidhyamitra.com/city/rishikesh/1977-10-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T02:07:48.962Z","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":"2026-06-01T02:07:48.962Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T02:07:48.962Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}