{"id":"vidhyamitra:city-day:rishikesh:1979-09-27:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1979-09-27","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1979-09-27","date_display":"September 27, 1979 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":1979,"month":9,"day":27,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444143.770833,"kali_year":5081,"ahargana":1855678.2708,"sun":{"sidereal_longitude":159.0824,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":226.3514,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":6,"name":"Ṣaṣṭhī","paksha":"Śukla","full_name":"Śukla Ṣaṣṭhī","elongation_degrees":67.269,"elapsed_within_tithi_degrees":7.269},"nakshatra":{"number":17,"name":"Anurādhā","pada":4,"moon_longitude":226.3514,"elapsed_within_degrees":13.0181},"yoga":{"number":2,"name":"Prīti","sum_longitude":25.4338},"karana":{"half_tithi_index":11,"name":"Taitila"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"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":1979,"month":9,"day":27,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444143.770833,"ahargana":1855678.2708,"kali_year":5081,"ayanamsa_lahiri":23.5699,"grahas":{"sun":{"sidereal_longitude":159.77699200000006,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"moon":{"sidereal_longitude":223.66749200000004,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":4},"retrograde":false,"latitude":4.4995},"mars":{"sidereal_longitude":97.99699199999998,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":170.73069199999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":125.71909200000005,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":168.84359199999994,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":145.52039200000002,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":137.2351,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":317.2351,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":4},"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":1979,"month":9,"day":27,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444143.770833,"kali_year":5081,"ahargana":1855678.2708,"sun":{"sidereal_longitude":159.0824,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":226.3514,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":6,"name":"Ṣaṣṭhī","paksha":"Śukla","full_name":"Śukla Ṣaṣṭhī","elongation_degrees":67.269,"elapsed_within_tithi_degrees":7.269},"nakshatra":{"number":17,"name":"Anurādhā","pada":4,"moon_longitude":226.3514,"elapsed_within_degrees":13.0181},"yoga":{"number":2,"name":"Prīti","sum_longitude":25.4338},"karana":{"half_tithi_index":11,"name":"Taitila"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.499,"elongation":67.269},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.499,"opposition_distance":112.731}},"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":"06:06","sunsetLocal":"18:08","solarNoonLocal":"12:07","dayLengthHours":12.02558961342391,"dayLengthDisplay":"12 Hours 01 Mins 32 Secs","nightLengthDisplay":"11 Hours 58 Mins 28 Secs","moonriseLocal":"11:12","moonsetLocal":"21:33","rahuKala":{"name":"Rāhu Kāla","start":"13:37","end":"15:07","startHours":13.621345941766021,"endHours":15.124544643444011,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"06:06","end":"07:37","startHours":6.105352433376077,"endHours":7.608551135054066,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"09:07","end":"10:37","startHours":9.111749836732056,"endHours":10.614948538410044,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:55","end":"09:19","startHours":8.91132334317499,"endHours":9.31217633028912,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:36","end":"06:56","startHours":6.60641866726874,"endHours":6.927101056960045,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:43","end":"12:31","startHours":11.717294252973902,"endHours":12.519000227202161,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:30","end":"05:18","startHours":4.5019404849195555,"endHours":5.303646459147816,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:06","end":"06:06","startHours":5.1032199655907515,"endHours":6.105352433376077,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:07","end":"14:55","startHours":14.122412175658685,"endHours":14.924118149886946,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:56","end":"18:20","startHours":17.930942046799988,"endHours":18.330942046799986,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:08","end":"18:38","startHours":18.130942046799987,"endHours":18.63200828069265,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:53","end":"19:38","startHours":17.880942046799987,"endHours":19.630942046799987,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:43","end":"00:31","startHours":23.7172942529739,"endHours":24.519000227202163,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"06:06","end":"07:37","startHours":6.105352433376077,"endHours":7.608551135054066,"quality":"auspicious"},{"name":"Roga","start":"07:37","end":"09:07","startHours":7.608551135054066,"endHours":9.111749836732056,"quality":"inauspicious"},{"name":"Udveg","start":"09:07","end":"10:37","startHours":9.111749836732056,"endHours":10.614948538410044,"quality":"inauspicious"},{"name":"Chala","start":"10:37","end":"12:07","startHours":10.614948538410044,"endHours":12.118147240088032,"quality":"neutral"},{"name":"Labha","start":"12:07","end":"13:37","startHours":12.118147240088032,"endHours":13.621345941766021,"quality":"auspicious"},{"name":"Amṛta","start":"13:37","end":"15:07","startHours":13.621345941766021,"endHours":15.124544643444011,"quality":"auspicious"},{"name":"Kāla","start":"15:07","end":"16:38","startHours":15.124544643444011,"endHours":16.627743345122,"quality":"inauspicious"},{"name":"Śubha","start":"16:38","end":"18:08","startHours":16.627743345122,"endHours":18.130942046799987,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"18:08","end":"19:38","startHours":18.130942046799987,"endHours":19.627743345122,"quality":"auspicious"},{"name":"Kāla","start":"19:38","end":"21:07","startHours":19.627743345122,"endHours":21.12454464344401,"quality":"inauspicious"},{"name":"Śubha","start":"21:07","end":"22:37","startHours":21.12454464344401,"endHours":22.62134594176602,"quality":"auspicious"},{"name":"Roga","start":"22:37","end":"00:07","startHours":22.62134594176602,"endHours":24.11814724008803,"quality":"inauspicious"},{"name":"Udveg","start":"00:07","end":"01:37","startHours":24.11814724008803,"endHours":25.614948538410044,"quality":"inauspicious"},{"name":"Chala","start":"01:37","end":"03:07","startHours":25.614948538410044,"endHours":27.111749836732052,"quality":"neutral"},{"name":"Labha","start":"03:07","end":"04:37","startHours":27.111749836732052,"endHours":28.608551135054064,"quality":"auspicious"},{"name":"Amṛta","start":"04:37","end":"06:06","startHours":28.608551135054064,"endHours":30.105352433376076,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:06","end":"07:06","startHours":6.105352433376077,"endHours":7.105352433376077,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"07:06","end":"08:06","startHours":7.105352433376077,"endHours":8.105352433376076,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"08:06","end":"09:06","startHours":8.105352433376076,"endHours":9.105352433376076,"planetary_lord":"Moon"},{"name":"Hora 4","start":"09:06","end":"10:06","startHours":9.105352433376076,"endHours":10.105352433376076,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"10:06","end":"11:06","startHours":10.105352433376076,"endHours":11.105352433376076,"planetary_lord":"Venus"},{"name":"Hora 6","start":"11:06","end":"12:06","startHours":11.105352433376076,"endHours":12.105352433376076,"planetary_lord":"Sun"},{"name":"Hora 7","start":"12:06","end":"13:06","startHours":12.105352433376076,"endHours":13.105352433376076,"planetary_lord":"Mars"},{"name":"Hora 8","start":"13:06","end":"14:06","startHours":13.105352433376076,"endHours":14.105352433376076,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"14:06","end":"15:06","startHours":14.105352433376076,"endHours":15.105352433376076,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"15:06","end":"16:06","startHours":15.105352433376076,"endHours":16.105352433376076,"planetary_lord":"Moon"},{"name":"Hora 11","start":"16:06","end":"17:06","startHours":16.105352433376076,"endHours":17.105352433376076,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"17:06","end":"18:06","startHours":17.105352433376076,"endHours":18.105352433376076,"planetary_lord":"Venus"},{"name":"Hora 13","start":"18:06","end":"19:06","startHours":18.105352433376076,"endHours":19.105352433376076,"planetary_lord":"Sun"},{"name":"Hora 14","start":"19:06","end":"20:06","startHours":19.105352433376076,"endHours":20.105352433376076,"planetary_lord":"Mars"},{"name":"Hora 15","start":"20:06","end":"21:06","startHours":20.105352433376076,"endHours":21.105352433376076,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"21:06","end":"22:06","startHours":21.105352433376076,"endHours":22.105352433376076,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"22:06","end":"23:06","startHours":22.105352433376076,"endHours":23.105352433376076,"planetary_lord":"Moon"},{"name":"Hora 18","start":"23:06","end":"00:06","startHours":23.105352433376076,"endHours":24.105352433376076,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"00:06","end":"01:06","startHours":24.105352433376076,"endHours":25.105352433376076,"planetary_lord":"Venus"},{"name":"Hora 20","start":"01:06","end":"02:06","startHours":25.105352433376076,"endHours":26.105352433376076,"planetary_lord":"Sun"},{"name":"Hora 21","start":"02:06","end":"03:06","startHours":26.105352433376076,"endHours":27.105352433376076,"planetary_lord":"Mars"},{"name":"Hora 22","start":"03:06","end":"04:06","startHours":27.105352433376076,"endHours":28.105352433376076,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"04:06","end":"05:06","startHours":28.105352433376076,"endHours":29.105352433376076,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"05:06","end":"06:06","startHours":29.105352433376076,"endHours":30.105352433376076,"planetary_lord":"Moon"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Revatī"],"unfavorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Citrā","Svātī","Viśākhā","Anurādhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara 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":"South (Dakṣiṇa)","chandraVasa":"North-East","rahuVasa":"North-West","anandadiYoga":{"name":"Saumya","quality":"Auspicious"},"tropicalRitu":"Śarad (Autumn) (tropical)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-1.3305302622539767,"eotMinutes":9.840765594718077,"ayanamsa":23.5699}},"calendars":{"vikram_samvat":2036,"vikram_samvatsara":"Aṅgirasa","saka_samvat":1901,"saka_samvatsara":"Siddhārthī","bengali_samvat":1386,"malayalam_era":1155,"nanakshahi_year":510,"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":"Kanyā (Puraṭṭāsi)","ritu":"Śarad (Autumn)","display_summary":"Āśvina Śukla Ṣaṣṭhī · Vikram 2036 Aṅgirasa · Śaka 1901 Siddhārthī"},"festivals":[],"todays_walk":{"walk":{"id":"guru-walk","name":"Bṛhaspati Walk","name_sanskrit":"गुरु यात्रा","type":"graha","description":"Wisdom transmission + BG 4.34.","step_count":8,"url":"/walk/guru-walk"},"reason":"Guruvāra (Thursday) — 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 September 27, 1979 CE · Ṛṣikeśa · Vidhyamitra","description":"September 27, 1979 CE for Ṛṣikeśa: Śukla Ṣaṣṭhī, sūryodaya 06:06, sūryāsta 18:08.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1979-09-27","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1979-09-27","sa":"https://sa.vidhyamitra.com/city/rishikesh/1979-09-27","hi":"https://hi.vidhyamitra.com/city/rishikesh/1979-09-27","x-default":"https://vidhyamitra.com/city/rishikesh/1979-09-27"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T11:59:14.294Z","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":"2026-05-31T11:59:14.294Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T11:59:14.294Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}