{"id":"vidhyamitra:city-day:rishikesh:1987-05-10:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1987-05-10","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1987-05-10","date_display":"May 10, 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":"Not independently benchmarked across the declared range","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":1987,"month":5,"day":10,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2446925.770833,"kali_year":5089,"ahargana":1858460.2708,"sun":{"sidereal_longitude":25.2379,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":160.8724,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":135.6345,"elapsed_within_tithi_degrees":3.6345},"nakshatra":{"number":13,"name":"Hasta","pada":1,"moon_longitude":160.8724,"elapsed_within_degrees":0.8724},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":186.1103},"karana":{"half_tithi_index":22,"name":"Bava"},"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":1987,"month":5,"day":10,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2446925.770833,"ahargana":1858460.2708,"kali_year":5089,"ayanamsa_lahiri":23.6763,"grahas":{"sun":{"sidereal_longitude":25.194398999999976,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":4},"retrograde":false},"moon":{"sidereal_longitude":160.43689900000004,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":false,"latitude":0.7001},"mars":{"sidereal_longitude":59.30159900000001,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":28.409298999999976,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":353.242399,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"venus":{"sidereal_longitude":357.516799,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":235.92639899999995,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":3},"retrograde":true},"rahu":{"sidereal_longitude":349.8313,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":169.8313,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","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":"Not independently benchmarked across the declared range","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":1987,"month":5,"day":10,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2446925.770833,"kali_year":5089,"ahargana":1858460.2708,"sun":{"sidereal_longitude":25.2379,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":160.8724,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":135.6345,"elapsed_within_tithi_degrees":3.6345},"nakshatra":{"number":13,"name":"Hasta","pada":1,"moon_longitude":160.8724,"elapsed_within_degrees":0.8724},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":186.1103},"karana":{"half_tithi_index":22,"name":"Bava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":0.7,"elongation":135.634},"lunar":{"type":"lunar","occurs":false,"moon_latitude":0.7,"opposition_distance":44.366}},"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":"18:59","solarNoonLocal":"12:13","dayLengthHours":13.53465266214917,"dayLengthDisplay":"13 Hours 32 Mins 05 Secs","nightLengthDisplay":"10 Hours 27 Mins 55 Secs","moonriseLocal":"15:15","moonsetLocal":"03:13","rahuKala":{"name":"Rāhu Kāla","start":"17:18","end":"18:59","startHours":17.29637765123838,"endHours":18.988209234007027,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:13","end":"13:55","startHours":12.220882902932441,"endHours":13.912714485701088,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:36","end":"17:18","startHours":15.604546068469734,"endHours":17.29637765123838,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:37","end":"09:04","startHours":8.611642193025995,"endHours":9.0627972817643,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:01","end":"06:23","startHours":6.0175004327807375,"endHours":6.378424503771382,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:46","end":"12:40","startHours":11.769727814194136,"endHours":12.672037991670747,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:39","end":"04:33","startHours":3.6489362169046324,"endHours":4.551246394381244,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:20","end":"05:27","startHours":4.325668850012091,"endHours":5.453556571857855,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:29","end":"15:23","startHours":14.476658346623967,"endHours":15.378968524100578,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:47","end":"19:11","startHours":18.788209234007027,"endHours":19.188209234007026,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:59","end":"19:33","startHours":18.988209234007027,"endHours":19.55215309492991,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:44","end":"20:29","startHours":18.738209234007027,"endHours":20.488209234007027,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:46","end":"00:40","startHours":23.769727814194134,"endHours":24.67203799167075,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:27","end":"07:09","startHours":5.453556571857855,"endHours":7.1453881546265015,"quality":"inauspicious"},{"name":"Chala","start":"07:09","end":"08:50","startHours":7.1453881546265015,"endHours":8.837219737395149,"quality":"neutral"},{"name":"Labha","start":"08:50","end":"10:32","startHours":8.837219737395149,"endHours":10.529051320163795,"quality":"auspicious"},{"name":"Amṛta","start":"10:32","end":"12:13","startHours":10.529051320163795,"endHours":12.220882902932441,"quality":"auspicious"},{"name":"Kāla","start":"12:13","end":"13:55","startHours":12.220882902932441,"endHours":13.912714485701088,"quality":"inauspicious"},{"name":"Śubha","start":"13:55","end":"15:36","startHours":13.912714485701088,"endHours":15.604546068469734,"quality":"auspicious"},{"name":"Roga","start":"15:36","end":"17:18","startHours":15.604546068469734,"endHours":17.29637765123838,"quality":"inauspicious"},{"name":"Udveg","start":"17:18","end":"18:59","startHours":17.29637765123838,"endHours":18.988209234007027,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:59","end":"20:18","startHours":18.988209234007027,"endHours":20.29637765123838,"quality":"auspicious"},{"name":"Roga","start":"20:18","end":"21:36","startHours":20.29637765123838,"endHours":21.604546068469734,"quality":"inauspicious"},{"name":"Udveg","start":"21:36","end":"22:55","startHours":21.604546068469734,"endHours":22.912714485701088,"quality":"inauspicious"},{"name":"Chala","start":"22:55","end":"00:13","startHours":22.912714485701088,"endHours":24.22088290293244,"quality":"neutral"},{"name":"Labha","start":"00:13","end":"01:32","startHours":24.22088290293244,"endHours":25.529051320163795,"quality":"auspicious"},{"name":"Amṛta","start":"01:32","end":"02:50","startHours":25.529051320163795,"endHours":26.83721973739515,"quality":"auspicious"},{"name":"Kāla","start":"02:50","end":"04:09","startHours":26.83721973739515,"endHours":28.145388154626502,"quality":"inauspicious"},{"name":"Śubha","start":"04:09","end":"05:27","startHours":28.145388154626502,"endHours":29.453556571857856,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:27","end":"06:27","startHours":5.453556571857855,"endHours":6.453556571857855,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:27","end":"07:27","startHours":6.453556571857855,"endHours":7.453556571857855,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:27","end":"08:27","startHours":7.453556571857855,"endHours":8.453556571857856,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:27","end":"09:27","startHours":8.453556571857856,"endHours":9.453556571857856,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:27","end":"10:27","startHours":9.453556571857856,"endHours":10.453556571857856,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:27","end":"11:27","startHours":10.453556571857856,"endHours":11.453556571857856,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:27","end":"12:27","startHours":11.453556571857856,"endHours":12.453556571857856,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:27","end":"13:27","startHours":12.453556571857856,"endHours":13.453556571857856,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:27","end":"14:27","startHours":13.453556571857856,"endHours":14.453556571857856,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:27","end":"15:27","startHours":14.453556571857856,"endHours":15.453556571857856,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:27","end":"16:27","startHours":15.453556571857856,"endHours":16.453556571857856,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:27","end":"17:27","startHours":16.453556571857856,"endHours":17.453556571857856,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:27","end":"18:27","startHours":17.453556571857856,"endHours":18.453556571857856,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:27","end":"19:27","startHours":18.453556571857856,"endHours":19.453556571857856,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:27","end":"20:27","startHours":19.453556571857856,"endHours":20.453556571857856,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:27","end":"21:27","startHours":20.453556571857856,"endHours":21.453556571857856,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:27","end":"22:27","startHours":21.453556571857856,"endHours":22.453556571857856,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:27","end":"23:27","startHours":22.453556571857856,"endHours":23.453556571857856,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:27","end":"00:27","startHours":23.453556571857856,"endHours":24.453556571857856,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:27","end":"01:27","startHours":24.453556571857856,"endHours":25.453556571857856,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:27","end":"02:27","startHours":25.453556571857856,"endHours":26.453556571857856,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:27","end":"03:27","startHours":26.453556571857856,"endHours":27.453556571857856,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:27","end":"04:27","startHours":27.453556571857856,"endHours":28.453556571857856,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:27","end":"05:27","startHours":28.453556571857856,"endHours":29.453556571857856,"planetary_lord":"Jupiter"}],"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","Kanyā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Tulā","Dhanu","Makara"]},"dishaShool":"West (Paścim)","chandraVasa":"North-West","rahuVasa":"North-East","anandadiYoga":{"name":"Mānasa","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring) (tropical)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":17.432551262705417,"eotMinutes":3.6766258240534686,"ayanamsa":23.6763}},"calendars":{"vikram_samvat":2044,"vikram_samvatsara":"Vikrama","saka_samvat":1909,"saka_samvatsara":"Prabhava","bengali_samvat":1394,"malayalam_era":1163,"nanakshahi_year":518,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Vaiśākha","lunar_month_amanta":"Vaiśākha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha Śukla Dvādaśī · Vikram 2044 Vikrama · Śaka 1909 Prabhava"},"festivals":[],"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":[]},"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 10, 1987 CE · Ṛṣikeśa · Vidhyamitra","description":"May 10, 1987 CE for Ṛṣikeśa: Śukla Dvādaśī, sūryodaya 05:27, sūryāsta 18:59.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1987-05-10","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1987-05-10","sa":"https://sa.vidhyamitra.com/city/rishikesh/1987-05-10","hi":"https://hi.vidhyamitra.com/city/rishikesh/1987-05-10","x-default":"https://vidhyamitra.com/city/rishikesh/1987-05-10"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-08-09T18:07:45.683Z","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":"2026-08-09T18:07:45.683Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-08-09T18:07:45.683Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"},"reader_local_antaryami":{"reader_geography":"Every reader enters from their own kṣetra anywhere on Bhūmi; no single city is the universal center.","purna_chain":["Goloka/Vraja Rādhā-Krishna","Vaikuṇṭha Lakṣmī-Nārāyaṇa","Mahāviṣṇu/Kāraṇodakaśāyī Viṣṇu","Garbhodakaśāyī Viṣṇu","Brahmā","Kṣīrodaka Paramātmā/Antaryāmī (Kṣīrodakaśāyī Viṣṇu)","Bhūmi","reader's own kṣetra anywhere on Bhūmi","exact reading kṣetra","reader-bhakta","chitta/vāṇī/aṅgulī","keyboard-silicon-pathways","Vidhyāmitra substrate","reader/seer","Krishna"],"antaryami_responsibility_formula":"Kṣīrodakaśāyī Viṣṇu = Paramātmā = Antaryāmī. Jīva desires. Prakṛti executes through guṇas. Paramātmā witnesses, permits, remembers, guides, and sustains. Bhagavān is the ultimate source.","source_anchors":[{"label":"BG 13.23","path":"/bhagavad-gita/13/23","meaning":"upadraṣṭā-anumantā · witness-permitter"},{"label":"BG 15.15","path":"/bhagavad-gita/15/15","meaning":"the Lord seated in every heart as memory, knowledge, and forgetting"},{"label":"BG 18.61","path":"/bhagavad-gita/18/61","meaning":"Īśvara seated in the heart of all beings"}],"nama_seal":"Hare Krishna Hare Krishna · Krishna Krishna Hare Hare · Hare Rama Hare Rama · Rama Rama Hare Hare"}}}