{"id":"vidhyamitra:city-day:colombo:1997-02-01:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/colombo/1997-02-01","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1997-02-01","date_display":"February 1, 1997 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":1997,"month":2,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2450480.770833,"kali_year":5098,"ahargana":1862015.2708,"sun":{"sidereal_longitude":288.4297,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":204.7145,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":24,"name":"Navamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Navamī","elongation_degrees":276.2848,"elapsed_within_tithi_degrees":0.2848},"nakshatra":{"number":16,"name":"Viśākhā","pada":2,"moon_longitude":204.7145,"elapsed_within_degrees":4.7145},"yoga":{"number":10,"name":"Gaṇḍa","sum_longitude":133.1442},"karana":{"half_tithi_index":46,"name":"Taitila"},"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":1997,"month":2,"day":1,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2450480.770833,"ahargana":1862015.2708,"kali_year":5098,"ayanamsa_lahiri":23.8123,"grahas":{"sun":{"sidereal_longitude":288.40397200000007,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"moon":{"sidereal_longitude":200.98607200000004,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":1},"retrograde":false,"latitude":3.0813},"mars":{"sidereal_longitude":161.90907200000004,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":265.01357200000007,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":278.687272,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":273.57657199999994,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":339.786772,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":161.4703,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":341.4703,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","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":1997,"month":2,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2450480.770833,"kali_year":5098,"ahargana":1862015.2708,"sun":{"sidereal_longitude":288.4297,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":204.7145,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":24,"name":"Navamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Navamī","elongation_degrees":276.2848,"elapsed_within_tithi_degrees":0.2848},"nakshatra":{"number":16,"name":"Viśākhā","pada":2,"moon_longitude":204.7145,"elapsed_within_degrees":4.7145},"yoga":{"number":10,"name":"Gaṇḍa","sum_longitude":133.1442},"karana":{"half_tithi_index":46,"name":"Taitila"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.081,"elongation":83.715},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.081,"opposition_distance":96.285}},"eclipse_window_40days":[]},"city":{"slug":"colombo","name":"Colombo, Sri Lanka","lat":6.9271,"lon":79.8612,"tz_offset_hours":5.5,"country":"LK","tier":"diaspora"},"tier2":{"city":{"slug":"colombo","name":"Colombo, Sri Lanka","lat":6.9271,"lon":79.8612,"tz_offset_hours":5.5,"country":"LK","tier":"diaspora"},"sunriseLocal":"06:29","sunsetLocal":"18:19","solarNoonLocal":"12:24","dayLengthHours":11.830967867536998,"dayLengthDisplay":"11 Hours 49 Mins 51 Secs","nightLengthDisplay":"12 Hours 10 Mins 09 Secs","moonriseLocal":"00:40","moonsetLocal":"12:29","rahuKala":{"name":"Rāhu Kāla","start":"09:27","end":"10:56","startHours":9.446333835072345,"endHours":10.92520481851447,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:53","end":"15:22","startHours":13.882946785398719,"endHours":15.361817768840844,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:29","end":"07:58","startHours":6.488591868188095,"endHours":7.96746285163022,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:15","end":"09:39","startHours":9.249151037280061,"endHours":9.643516632864628,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:59","end":"07:18","startHours":6.981548862668803,"endHours":7.297041339136457,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:01","end":"12:48","startHours":12.009710206372027,"endHours":12.798441397541161,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:55","end":"05:42","startHours":4.911129485849829,"endHours":5.699860677018962,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:30","end":"06:29","startHours":5.502677879226678,"endHours":6.488591868188095,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:23","end":"15:10","startHours":14.375903779879426,"endHours":15.164634971048558,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:07","end":"18:31","startHours":18.119559735725094,"endHours":18.519559735725093,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:19","end":"18:49","startHours":18.319559735725093,"endHours":18.8125167302058,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:04","end":"19:49","startHours":18.069559735725093,"endHours":19.819559735725093,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:01","end":"00:48","startHours":24.009710206372027,"endHours":24.79844139754116,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"06:29","end":"07:58","startHours":6.488591868188095,"endHours":7.96746285163022,"quality":"inauspicious"},{"name":"Śubha","start":"07:58","end":"09:27","startHours":7.96746285163022,"endHours":9.446333835072345,"quality":"auspicious"},{"name":"Roga","start":"09:27","end":"10:56","startHours":9.446333835072345,"endHours":10.92520481851447,"quality":"inauspicious"},{"name":"Udveg","start":"10:56","end":"12:24","startHours":10.92520481851447,"endHours":12.404075801956594,"quality":"inauspicious"},{"name":"Chala","start":"12:24","end":"13:53","startHours":12.404075801956594,"endHours":13.882946785398719,"quality":"neutral"},{"name":"Labha","start":"13:53","end":"15:22","startHours":13.882946785398719,"endHours":15.361817768840844,"quality":"auspicious"},{"name":"Amṛta","start":"15:22","end":"16:50","startHours":15.361817768840844,"endHours":16.84068875228297,"quality":"auspicious"},{"name":"Kāla","start":"16:50","end":"18:19","startHours":16.84068875228297,"endHours":18.319559735725093,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:19","end":"19:50","startHours":18.319559735725093,"endHours":19.84068875228297,"quality":"auspicious"},{"name":"Amṛta","start":"19:50","end":"21:22","startHours":19.84068875228297,"endHours":21.361817768840844,"quality":"auspicious"},{"name":"Kāla","start":"21:22","end":"22:53","startHours":21.361817768840844,"endHours":22.88294678539872,"quality":"inauspicious"},{"name":"Śubha","start":"22:53","end":"00:24","startHours":22.88294678539872,"endHours":24.404075801956594,"quality":"auspicious"},{"name":"Roga","start":"00:24","end":"01:56","startHours":24.404075801956594,"endHours":25.92520481851447,"quality":"inauspicious"},{"name":"Udveg","start":"01:56","end":"03:27","startHours":25.92520481851447,"endHours":27.446333835072345,"quality":"inauspicious"},{"name":"Chala","start":"03:27","end":"04:58","startHours":27.446333835072345,"endHours":28.96746285163022,"quality":"neutral"},{"name":"Labha","start":"04:58","end":"06:29","startHours":28.96746285163022,"endHours":30.488591868188095,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:29","end":"07:29","startHours":6.488591868188095,"endHours":7.488591868188095,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"07:29","end":"08:29","startHours":7.488591868188095,"endHours":8.488591868188095,"planetary_lord":"Moon"},{"name":"Hora 3","start":"08:29","end":"09:29","startHours":8.488591868188095,"endHours":9.488591868188095,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"09:29","end":"10:29","startHours":9.488591868188095,"endHours":10.488591868188095,"planetary_lord":"Venus"},{"name":"Hora 5","start":"10:29","end":"11:29","startHours":10.488591868188095,"endHours":11.488591868188095,"planetary_lord":"Sun"},{"name":"Hora 6","start":"11:29","end":"12:29","startHours":11.488591868188095,"endHours":12.488591868188095,"planetary_lord":"Mars"},{"name":"Hora 7","start":"12:29","end":"13:29","startHours":12.488591868188095,"endHours":13.488591868188095,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"13:29","end":"14:29","startHours":13.488591868188095,"endHours":14.488591868188095,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"14:29","end":"15:29","startHours":14.488591868188095,"endHours":15.488591868188095,"planetary_lord":"Moon"},{"name":"Hora 10","start":"15:29","end":"16:29","startHours":15.488591868188095,"endHours":16.488591868188095,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"16:29","end":"17:29","startHours":16.488591868188095,"endHours":17.488591868188095,"planetary_lord":"Venus"},{"name":"Hora 12","start":"17:29","end":"18:29","startHours":17.488591868188095,"endHours":18.488591868188095,"planetary_lord":"Sun"},{"name":"Hora 13","start":"18:29","end":"19:29","startHours":18.488591868188095,"endHours":19.488591868188095,"planetary_lord":"Mars"},{"name":"Hora 14","start":"19:29","end":"20:29","startHours":19.488591868188095,"endHours":20.488591868188095,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"20:29","end":"21:29","startHours":20.488591868188095,"endHours":21.488591868188095,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"21:29","end":"22:29","startHours":21.488591868188095,"endHours":22.488591868188095,"planetary_lord":"Moon"},{"name":"Hora 17","start":"22:29","end":"23:29","startHours":22.488591868188095,"endHours":23.488591868188095,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"23:29","end":"00:29","startHours":23.488591868188095,"endHours":24.488591868188095,"planetary_lord":"Venus"},{"name":"Hora 19","start":"00:29","end":"01:29","startHours":24.488591868188095,"endHours":25.488591868188095,"planetary_lord":"Sun"},{"name":"Hora 20","start":"01:29","end":"02:29","startHours":25.488591868188095,"endHours":26.488591868188095,"planetary_lord":"Mars"},{"name":"Hora 21","start":"02:29","end":"03:29","startHours":26.488591868188095,"endHours":27.488591868188095,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"03:29","end":"04:29","startHours":27.488591868188095,"endHours":28.488591868188095,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"04:29","end":"05:29","startHours":28.488591868188095,"endHours":29.488591868188095,"planetary_lord":"Moon"},{"name":"Hora 24","start":"05:29","end":"06:29","startHours":29.488591868188095,"endHours":30.488591868188095,"planetary_lord":"Mercury"}],"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","Karka","Siṃha","Tulā","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Vṛścika","Makara","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"North","rahuVasa":"East","anandadiYoga":{"name":"Maitra","quality":"Auspicious"},"tropicalRitu":"Śiśira (Winter) (tropical)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-17.131523571280432,"eotMinutes":-13.689348117395623,"ayanamsa":23.8123}},"calendars":{"vikram_samvat":2054,"vikram_samvatsara":"Vikṛti","saka_samvat":1919,"saka_samvatsara":"Īśvara","bengali_samvat":1404,"malayalam_era":1173,"nanakshahi_year":528,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Māgha","lunar_month_amanta":"Pauṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Kṛṣṇa Navamī · Vikram 2054 Vikṛti · Śaka 1919 Īśvara"},"festivals":[],"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":"-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":"colombo"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga February 1, 1997 CE · Colombo, Sri Lanka · Vidhyamitra","description":"February 1, 1997 CE for Colombo, Sri Lanka: Kṛṣṇa Navamī, sūryodaya 06:29, sūryāsta 18:19.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/colombo/1997-02-01","hreflang_alternates":{"en":"https://vidhyamitra.com/city/colombo/1997-02-01","sa":"https://sa.vidhyamitra.com/city/colombo/1997-02-01","hi":"https://hi.vidhyamitra.com/city/colombo/1997-02-01","x-default":"https://vidhyamitra.com/city/colombo/1997-02-01"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T04:50:19.900Z","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":"2026-06-01T04:50:19.900Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T04:50:19.900Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}