{"id":"vidhyamitra:city-day:rishikesh:1987-07-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1987-07-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1987-07-18","date_display":"July 18, 1987 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":1987,"month":7,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2446994.770833,"kali_year":5089,"ahargana":1858529.2708,"sun":{"sidereal_longitude":90.817,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":0.1575,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":23,"name":"Aṣṭamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Aṣṭamī","elongation_degrees":269.3406,"elapsed_within_tithi_degrees":5.3406},"nakshatra":{"number":1,"name":"Aśvinī","pada":1,"moon_longitude":0.1575,"elapsed_within_degrees":0.1575},"yoga":{"number":7,"name":"Sukarma","sum_longitude":90.9745},"karana":{"half_tithi_index":44,"name":"Bālava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"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":1987,"month":7,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2446994.770833,"ahargana":1858529.2708,"kali_year":5089,"ayanamsa_lahiri":23.679,"grahas":{"sun":{"sidereal_longitude":91.233563,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":7,"name":"Punarvasu","pada":4},"retrograde":false},"moon":{"sidereal_longitude":3.4392629999999826,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false,"latitude":1.0862},"mars":{"sidereal_longitude":103.75616300000002,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":74.04346299999997,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":5.06106299999999,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"venus":{"sidereal_longitude":81.462963,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":231.34916299999998,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":346.1754,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":166.1754,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","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":1987,"month":7,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2446994.770833,"kali_year":5089,"ahargana":1858529.2708,"sun":{"sidereal_longitude":90.817,"rashi":4,"rashi_name":"Karka"},"moon":{"sidereal_longitude":0.1575,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":23,"name":"Aṣṭamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Aṣṭamī","elongation_degrees":269.3406,"elapsed_within_tithi_degrees":5.3406},"nakshatra":{"number":1,"name":"Aśvinī","pada":1,"moon_longitude":0.1575,"elapsed_within_degrees":0.1575},"yoga":{"number":7,"name":"Sukarma","sum_longitude":90.9745},"karana":{"half_tithi_index":44,"name":"Bālava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.086,"elongation":90.659},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.086,"opposition_distance":89.341}},"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":"05:27","sunsetLocal":"19:19","solarNoonLocal":"12:23","dayLengthHours":13.868036203594736,"dayLengthDisplay":"13 Hours 52 Mins 05 Secs","nightLengthDisplay":"10 Hours 07 Mins 55 Secs","moonriseLocal":"00:04","moonsetLocal":"12:59","rahuKala":{"name":"Rāhu Kāla","start":"08:55","end":"10:39","startHours":8.912749551109798,"endHours":10.64625407655914,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"14:07","end":"15:51","startHours":14.113263127457824,"endHours":15.846767652907166,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"05:27","end":"07:11","startHours":5.445740500211114,"endHours":7.179245025660456,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:41","end":"09:09","startHours":8.681615614383219,"endHours":9.143883487836376,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:01","end":"06:24","startHours":6.023575342027561,"endHours":6.393389640790088,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:55","end":"12:51","startHours":11.917490728555325,"endHours":12.84202647546164,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:36","end":"04:31","startHours":3.596669006398483,"endHours":4.521204753304798,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:17","end":"05:27","startHours":4.290070816578219,"endHours":5.445740500211114,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:41","end":"15:37","startHours":14.69109796927427,"endHours":15.615633716180586,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:07","end":"19:31","startHours":19.11377670380585,"endHours":19.51377670380585,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:19","end":"19:53","startHours":19.31377670380585,"endHours":19.891611545622297,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:04","end":"20:49","startHours":19.06377670380585,"endHours":20.81377670380585,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:55","end":"00:51","startHours":23.917490728555325,"endHours":24.84202647546164,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"05:27","end":"07:11","startHours":5.445740500211114,"endHours":7.179245025660456,"quality":"inauspicious"},{"name":"Śubha","start":"07:11","end":"08:55","startHours":7.179245025660456,"endHours":8.912749551109798,"quality":"auspicious"},{"name":"Roga","start":"08:55","end":"10:39","startHours":8.912749551109798,"endHours":10.64625407655914,"quality":"inauspicious"},{"name":"Udveg","start":"10:39","end":"12:23","startHours":10.64625407655914,"endHours":12.379758602008483,"quality":"inauspicious"},{"name":"Chala","start":"12:23","end":"14:07","startHours":12.379758602008483,"endHours":14.113263127457824,"quality":"neutral"},{"name":"Labha","start":"14:07","end":"15:51","startHours":14.113263127457824,"endHours":15.846767652907166,"quality":"auspicious"},{"name":"Amṛta","start":"15:51","end":"17:35","startHours":15.846767652907166,"endHours":17.58027217835651,"quality":"auspicious"},{"name":"Kāla","start":"17:35","end":"19:19","startHours":17.58027217835651,"endHours":19.31377670380585,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"19:19","end":"20:35","startHours":19.31377670380585,"endHours":20.58027217835651,"quality":"auspicious"},{"name":"Amṛta","start":"20:35","end":"21:51","startHours":20.58027217835651,"endHours":21.846767652907165,"quality":"auspicious"},{"name":"Kāla","start":"21:51","end":"23:07","startHours":21.846767652907165,"endHours":23.113263127457824,"quality":"inauspicious"},{"name":"Śubha","start":"23:07","end":"00:23","startHours":23.113263127457824,"endHours":24.379758602008483,"quality":"auspicious"},{"name":"Roga","start":"00:23","end":"01:39","startHours":24.379758602008483,"endHours":25.64625407655914,"quality":"inauspicious"},{"name":"Udveg","start":"01:39","end":"02:55","startHours":25.64625407655914,"endHours":26.912749551109798,"quality":"inauspicious"},{"name":"Chala","start":"02:55","end":"04:11","startHours":26.912749551109798,"endHours":28.179245025660457,"quality":"neutral"},{"name":"Labha","start":"04:11","end":"05:27","startHours":28.179245025660457,"endHours":29.445740500211116,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:27","end":"06:27","startHours":5.445740500211114,"endHours":6.445740500211114,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"06:27","end":"07:27","startHours":6.445740500211114,"endHours":7.445740500211114,"planetary_lord":"Moon"},{"name":"Hora 3","start":"07:27","end":"08:27","startHours":7.445740500211114,"endHours":8.445740500211114,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"08:27","end":"09:27","startHours":8.445740500211114,"endHours":9.445740500211114,"planetary_lord":"Venus"},{"name":"Hora 5","start":"09:27","end":"10:27","startHours":9.445740500211114,"endHours":10.445740500211114,"planetary_lord":"Sun"},{"name":"Hora 6","start":"10:27","end":"11:27","startHours":10.445740500211114,"endHours":11.445740500211114,"planetary_lord":"Mars"},{"name":"Hora 7","start":"11:27","end":"12:27","startHours":11.445740500211114,"endHours":12.445740500211114,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"12:27","end":"13:27","startHours":12.445740500211114,"endHours":13.445740500211114,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"13:27","end":"14:27","startHours":13.445740500211114,"endHours":14.445740500211114,"planetary_lord":"Moon"},{"name":"Hora 10","start":"14:27","end":"15:27","startHours":14.445740500211114,"endHours":15.445740500211114,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"15:27","end":"16:27","startHours":15.445740500211114,"endHours":16.445740500211116,"planetary_lord":"Venus"},{"name":"Hora 12","start":"16:27","end":"17:27","startHours":16.445740500211116,"endHours":17.445740500211116,"planetary_lord":"Sun"},{"name":"Hora 13","start":"17:27","end":"18:27","startHours":17.445740500211116,"endHours":18.445740500211116,"planetary_lord":"Mars"},{"name":"Hora 14","start":"18:27","end":"19:27","startHours":18.445740500211116,"endHours":19.445740500211116,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"19:27","end":"20:27","startHours":19.445740500211116,"endHours":20.445740500211116,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"20:27","end":"21:27","startHours":20.445740500211116,"endHours":21.445740500211116,"planetary_lord":"Moon"},{"name":"Hora 17","start":"21:27","end":"22:27","startHours":21.445740500211116,"endHours":22.445740500211116,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"22:27","end":"23:27","startHours":22.445740500211116,"endHours":23.445740500211116,"planetary_lord":"Venus"},{"name":"Hora 19","start":"23:27","end":"00:27","startHours":23.445740500211116,"endHours":24.445740500211116,"planetary_lord":"Sun"},{"name":"Hora 20","start":"00:27","end":"01:27","startHours":24.445740500211116,"endHours":25.445740500211116,"planetary_lord":"Mars"},{"name":"Hora 21","start":"01:27","end":"02:27","startHours":25.445740500211116,"endHours":26.445740500211116,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"02:27","end":"03:27","startHours":26.445740500211116,"endHours":27.445740500211116,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"03:27","end":"04:27","startHours":27.445740500211116,"endHours":28.445740500211116,"planetary_lord":"Moon"},{"name":"Hora 24","start":"04:27","end":"05:27","startHours":28.445740500211116,"endHours":29.445740500211116,"planetary_lord":"Mercury"}],"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":["Meṣa","Mithuna","Kanyā","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Karka","Siṃha","Vṛścika","Dhanu","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"East","rahuVasa":"East","anandadiYoga":{"name":"Rākṣasa","quality":"Inauspicious"},"drikRitu":"Grīṣma (Summer)","vedicRitu":"Grīṣma (Summer)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":21.144673450297475,"eotMinutes":-5.85591612050904,"ayanamsa":23.679}},"calendars":{"vikram_samvat":2044,"vikram_samvatsara":"Vikrama","saka_samvat":1909,"saka_samvatsara":"Prabhava","bengali_samvat":1394,"malayalam_era":1163,"nanakshahi_year":518,"lunar_month":"Śrāvaṇa","lunar_month_paksha_full":"Śrāvaṇa Kṛṣṇa Pakṣa","solar_month":"Karkaṭa (Āḍi)","ritu":"Varṣā (Monsoon)","display_summary":"Śrāvaṇa Kṛṣṇa Aṣṭamī · Vikram 2044 Vikrama · Śaka 1909 Prabhava"},"festivals":[{"id":"karka-sankranti","name":"Karka Saṅkrānti (Dakṣiṇāyana)","name_sanskrit":"कर्क सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Cancer; Dakṣiṇāyana (south-going) begins. Devatā-rātri begins.","vrata":true,"detection":{"sun_rashi":"Karka"},"precedence":2}],"todays_walk":{"walk":{"id":"shani-walk","name":"Śani Walk","name_sanskrit":"शनि यात्रा","type":"graha","description":"Tapas + endurance + BG 17.14-19.","step_count":7,"url":"/walk/shani-walk"},"reason":"Śanivāra (Saturday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3226-07-09","event":"Bhagavān Krishna's birth at Mathurā","chart_id":"krishna","shared_marker":"same Kṛṣṇa Aṣṭamī","url":"/day/-3226-07-09","relevance":0.5},{"historical_date":"-3101-02-18","event":"Kali Yuga Epoch","chart_id":"kali-yuga-epoch","shared_marker":"same Aśvinī","url":"/day/-3101-02-18","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 July 18, 1987 CE · Ṛṣikeśa · Vidhyamitra","description":"July 18, 1987 CE for Ṛṣikeśa: Kṛṣṇa Aṣṭamī, sūryodaya 05:27, sūryāsta 19:19.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1987-07-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1987-07-18","sa":"https://sa.vidhyamitra.com/city/rishikesh/1987-07-18","hi":"https://hi.vidhyamitra.com/city/rishikesh/1987-07-18","x-default":"https://vidhyamitra.com/city/rishikesh/1987-07-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-19T11:01:21.535Z","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":"2026-05-19T11:01:21.535Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-19T11:01:21.535Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}