{"id":"vidhyamitra:city-day:rishikesh:2018-10-12:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/2018-10-12","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2018-10-12","date_display":"October 12, 2018 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":2018,"month":10,"day":12,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2458403.770833,"kali_year":5120,"ahargana":1869938.2708,"sun":{"sidereal_longitude":173.7702,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":211.4578,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":37.6876,"elapsed_within_tithi_degrees":1.6876},"nakshatra":{"number":16,"name":"Viśākhā","pada":4,"moon_longitude":211.4578,"elapsed_within_degrees":11.4578},"yoga":{"number":2,"name":"Prīti","sum_longitude":25.228},"karana":{"half_tithi_index":6,"name":"Vaṇija"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"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":2018,"month":10,"day":12,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2458403.770833,"ahargana":1869938.2708,"kali_year":5120,"ayanamsa_lahiri":24.1153,"grahas":{"sun":{"sidereal_longitude":174.55505500000004,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":211.00365499999998,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","pada":4},"retrograde":false,"latitude":4.2338},"mars":{"sidereal_longitude":286.33265499999993,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":188.640355,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":210.02375499999994,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":195.84215500000005,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":3},"retrograde":true},"saturn":{"sidereal_longitude":249.33295499999997,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":101.6716,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":281.6716,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":2018,"month":10,"day":12,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2458403.770833,"kali_year":5120,"ahargana":1869938.2708,"sun":{"sidereal_longitude":173.7702,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":211.4578,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":37.6876,"elapsed_within_tithi_degrees":1.6876},"nakshatra":{"number":16,"name":"Viśākhā","pada":4,"moon_longitude":211.4578,"elapsed_within_degrees":11.4578},"yoga":{"number":2,"name":"Prīti","sum_longitude":25.228},"karana":{"half_tithi_index":6,"name":"Vaṇija"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.234,"elongation":37.688},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.234,"opposition_distance":142.312}},"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":"06:16","sunsetLocal":"17:50","solarNoonLocal":"12:03","dayLengthHours":11.560999623297782,"dayLengthDisplay":"11 Hours 33 Mins 40 Secs","nightLengthDisplay":"12 Hours 26 Mins 20 Secs","moonriseLocal":"09:12","moonsetLocal":"19:45","rahuKala":{"name":"Rāhu Kāla","start":"10:36","end":"12:03","startHours":10.600043932268111,"endHours":12.045168885180335,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"14:56","end":"16:23","startHours":14.935418791004778,"endHours":16.380543743917002,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:43","end":"09:09","startHours":7.7097940264436655,"endHours":9.154918979355887,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:58","end":"09:21","startHours":8.962235652300926,"endHours":9.34760230641085,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:45","end":"07:03","startHours":6.74637739116885,"endHours":7.054670714456791,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:40","end":"12:26","startHours":11.659802231070408,"endHours":12.430535539290261,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:43","end":"05:30","startHours":4.723202457091738,"endHours":5.493935765311591,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:18","end":"06:16","startHours":5.301252438256627,"endHours":6.264669073531443,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:58","end":"14:45","startHours":13.972002155729964,"endHours":14.742735463949815,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:38","end":"18:02","startHours":17.625668696829226,"endHours":18.025668696829225,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:50","end":"18:18","startHours":17.825668696829226,"endHours":18.307377014466635,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:35","end":"19:20","startHours":17.575668696829226,"endHours":19.325668696829226,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:40","end":"00:26","startHours":23.659802231070408,"endHours":24.43053553929026,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"06:16","end":"07:43","startHours":6.264669073531443,"endHours":7.7097940264436655,"quality":"neutral"},{"name":"Labha","start":"07:43","end":"09:09","startHours":7.7097940264436655,"endHours":9.154918979355887,"quality":"auspicious"},{"name":"Amṛta","start":"09:09","end":"10:36","startHours":9.154918979355887,"endHours":10.600043932268111,"quality":"auspicious"},{"name":"Kāla","start":"10:36","end":"12:03","startHours":10.600043932268111,"endHours":12.045168885180335,"quality":"inauspicious"},{"name":"Śubha","start":"12:03","end":"13:29","startHours":12.045168885180335,"endHours":13.490293838092557,"quality":"auspicious"},{"name":"Roga","start":"13:29","end":"14:56","startHours":13.490293838092557,"endHours":14.935418791004778,"quality":"inauspicious"},{"name":"Udveg","start":"14:56","end":"16:23","startHours":14.935418791004778,"endHours":16.380543743917002,"quality":"inauspicious"},{"name":"Chala","start":"16:23","end":"17:50","startHours":16.380543743917002,"endHours":17.825668696829226,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"17:50","end":"19:23","startHours":17.825668696829226,"endHours":19.380543743917002,"quality":"inauspicious"},{"name":"Udveg","start":"19:23","end":"20:56","startHours":19.380543743917002,"endHours":20.93541879100478,"quality":"inauspicious"},{"name":"Chala","start":"20:56","end":"22:29","startHours":20.93541879100478,"endHours":22.49029383809256,"quality":"neutral"},{"name":"Labha","start":"22:29","end":"00:03","startHours":22.49029383809256,"endHours":24.045168885180335,"quality":"auspicious"},{"name":"Amṛta","start":"00:03","end":"01:36","startHours":24.045168885180335,"endHours":25.60004393226811,"quality":"auspicious"},{"name":"Kāla","start":"01:36","end":"03:09","startHours":25.60004393226811,"endHours":27.15491897935589,"quality":"inauspicious"},{"name":"Śubha","start":"03:09","end":"04:43","startHours":27.15491897935589,"endHours":28.709794026443667,"quality":"auspicious"},{"name":"Roga","start":"04:43","end":"06:16","startHours":28.709794026443667,"endHours":30.264669073531444,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:16","end":"07:16","startHours":6.264669073531443,"endHours":7.264669073531443,"planetary_lord":"Venus"},{"name":"Hora 2","start":"07:16","end":"08:16","startHours":7.264669073531443,"endHours":8.264669073531444,"planetary_lord":"Sun"},{"name":"Hora 3","start":"08:16","end":"09:16","startHours":8.264669073531444,"endHours":9.264669073531444,"planetary_lord":"Mars"},{"name":"Hora 4","start":"09:16","end":"10:16","startHours":9.264669073531444,"endHours":10.264669073531444,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"10:16","end":"11:16","startHours":10.264669073531444,"endHours":11.264669073531444,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"11:16","end":"12:16","startHours":11.264669073531444,"endHours":12.264669073531444,"planetary_lord":"Moon"},{"name":"Hora 7","start":"12:16","end":"13:16","startHours":12.264669073531444,"endHours":13.264669073531444,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"13:16","end":"14:16","startHours":13.264669073531444,"endHours":14.264669073531444,"planetary_lord":"Venus"},{"name":"Hora 9","start":"14:16","end":"15:16","startHours":14.264669073531444,"endHours":15.264669073531444,"planetary_lord":"Sun"},{"name":"Hora 10","start":"15:16","end":"16:16","startHours":15.264669073531444,"endHours":16.264669073531444,"planetary_lord":"Mars"},{"name":"Hora 11","start":"16:16","end":"17:16","startHours":16.264669073531444,"endHours":17.264669073531444,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"17:16","end":"18:16","startHours":17.264669073531444,"endHours":18.264669073531444,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"18:16","end":"19:16","startHours":18.264669073531444,"endHours":19.264669073531444,"planetary_lord":"Moon"},{"name":"Hora 14","start":"19:16","end":"20:16","startHours":19.264669073531444,"endHours":20.264669073531444,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"20:16","end":"21:16","startHours":20.264669073531444,"endHours":21.264669073531444,"planetary_lord":"Venus"},{"name":"Hora 16","start":"21:16","end":"22:16","startHours":21.264669073531444,"endHours":22.264669073531444,"planetary_lord":"Sun"},{"name":"Hora 17","start":"22:16","end":"23:16","startHours":22.264669073531444,"endHours":23.264669073531444,"planetary_lord":"Mars"},{"name":"Hora 18","start":"23:16","end":"00:16","startHours":23.264669073531444,"endHours":24.264669073531444,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"00:16","end":"01:16","startHours":24.264669073531444,"endHours":25.264669073531444,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"01:16","end":"02:16","startHours":25.264669073531444,"endHours":26.264669073531444,"planetary_lord":"Moon"},{"name":"Hora 21","start":"02:16","end":"03:16","startHours":26.264669073531444,"endHours":27.264669073531444,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"03:16","end":"04:16","startHours":27.264669073531444,"endHours":28.264669073531444,"planetary_lord":"Venus"},{"name":"Hora 23","start":"04:16","end":"05:16","startHours":28.264669073531444,"endHours":29.264669073531444,"planetary_lord":"Sun"},{"name":"Hora 24","start":"05:16","end":"06:16","startHours":29.264669073531444,"endHours":30.264669073531444,"planetary_lord":"Mars"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Hasta","Citrā","Svātī","Viśākhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Vṛścika","Makara"],"unfavorable_rashis":["Mithuna","Karka","Tulā","Dhanu","Kumbha","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"North-East","rahuVasa":"South-East","anandadiYoga":{"name":"Śrīvatsa","quality":"Auspicious"},"drikRitu":"Śarad (Autumn) (Drik)","vedicRitu":"Varṣā (Monsoon)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-7.314940543898755,"eotMinutes":14.219466889179907,"ayanamsa":24.1153}},"calendars":{"vikram_samvat":2075,"vikram_samvatsara":"Virodhakṛt","saka_samvat":1940,"saka_samvatsara":"Vilambī","bengali_samvat":1425,"malayalam_era":1194,"nanakshahi_year":549,"lunar_month":"Āśvina","lunar_month_paksha_full":"Āśvina Śukla Pakṣa","solar_month":"Kanyā (Puraṭṭāsi)","ritu":"Śarad (Autumn)","display_summary":"Āśvina Śukla Caturthī · Vikram 2075 Virodhakṛt · Śaka 1940 Vilambī"},"festivals":[{"id":"kanya-sankranti","name":"Kanyā Saṅkrānti (Mahālaya begins)","name_sanskrit":"कन्या सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Virgo; Mahālaya / Pitṛ-Pakṣa solar marker.","vrata":false,"detection":{"sun_rashi":"Kanyā"},"precedence":4},{"id":"vinayaka-chaturthi","name":"Vināyaka Caturthī (monthly)","name_sanskrit":"विनायक चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Śukla-pakṣa Caturthī; auspicious for new ventures.","vrata":true,"detection":{"tithi_number":4,"tithi_paksha":"Śukla"},"precedence":6}],"todays_walk":{"walk":{"id":"shukra-walk","name":"Śukra Walk","name_sanskrit":"शुक्र यात्रा","type":"graha","description":"Beauty + creativity in dharma + BG 10.36.","step_count":5,"url":"/walk/shukra-walk"},"reason":"Śukravāra (Friday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-0562-04-11","event":"Bhagavān Buddha's birth at Lumbinī","chart_id":"buddha","shared_marker":"same Viśākhā","url":"/day/-0562-04-11","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 12, 2018 CE · Ṛṣikeśa · Vidhyamitra","description":"October 12, 2018 CE for Ṛṣikeśa: Śukla Caturthī, sūryodaya 06:16, sūryāsta 17:50.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/2018-10-12","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/2018-10-12","sa":"https://sa.vidhyamitra.com/city/rishikesh/2018-10-12","hi":"https://hi.vidhyamitra.com/city/rishikesh/2018-10-12","x-default":"https://vidhyamitra.com/city/rishikesh/2018-10-12"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-15T16:11:53.482Z","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":"2026-05-15T16:11:53.482Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-15T16:11:53.482Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}