{"id":"vidhyamitra:city-day:thane:1980-02-01:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/thane/1980-02-01","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1980-02-01","date_display":"February 1, 1980 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":1980,"month":2,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444270.770833,"kali_year":5081,"ahargana":1855805.2708,"sun":{"sidereal_longitude":287.8154,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":108.5626,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":16,"name":"Pratipada","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Pratipada","elongation_degrees":180.7472,"elapsed_within_tithi_degrees":0.7472},"nakshatra":{"number":9,"name":"Āśleṣā","pada":1,"moon_longitude":108.5626,"elapsed_within_degrees":1.8959},"yoga":{"number":3,"name":"Āyuṣmān","sum_longitude":36.378},"karana":{"half_tithi_index":30,"name":"Bālava"},"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":1980,"month":2,"day":1,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444270.770833,"ahargana":1855805.2708,"kali_year":5081,"ayanamsa_lahiri":23.5748,"grahas":{"sun":{"sidereal_longitude":287.75483899999995,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"moon":{"sidereal_longitude":107.060539,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":1},"retrograde":false,"latitude":-1.6801},"mars":{"sidereal_longitude":140.42293900000004,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":295.604739,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":134.397039,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":true},"venus":{"sidereal_longitude":325.9805389999999,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":152.71363900000006,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":130.506,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":310.506,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","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":1980,"month":2,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444270.770833,"kali_year":5081,"ahargana":1855805.2708,"sun":{"sidereal_longitude":287.8154,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":108.5626,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":16,"name":"Pratipada","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Pratipada","elongation_degrees":180.7472,"elapsed_within_tithi_degrees":0.7472},"nakshatra":{"number":9,"name":"Āśleṣā","pada":1,"moon_longitude":108.5626,"elapsed_within_degrees":1.8959},"yoga":{"number":3,"name":"Āyuṣmān","sum_longitude":36.378},"karana":{"half_tithi_index":30,"name":"Bālava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-1.68,"elongation":179.253},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-1.68,"opposition_distance":0.747}},"eclipse_window_40days":[]},"city":{"slug":"thane","name":"Thane, Maharashtra","lat":19.2183,"lon":72.9781,"tz_offset_hours":5.5,"state":"Maharashtra","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"thane","name":"Thane, Maharashtra","lat":19.2183,"lon":72.9781,"tz_offset_hours":5.5,"state":"Maharashtra","country":"IN","tier":"tier-1"},"sunriseLocal":"07:13","sunsetLocal":"18:30","solarNoonLocal":"12:52","dayLengthHours":11.288807761027584,"dayLengthDisplay":"11 Hours 17 Mins 20 Secs","nightLengthDisplay":"12 Hours 42 Mins 40 Secs","moonriseLocal":"18:21","moonsetLocal":"07:17","rahuKala":{"name":"Rāhu Kāla","start":"11:27","end":"12:52","startHours":11.45184816516148,"endHours":12.862949135289927,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"15:41","end":"17:06","startHours":15.685151075546823,"endHours":17.09625204567527,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"08:38","end":"10:02","startHours":8.629646224904583,"endHours":10.040747195033031,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:51","end":"10:14","startHours":9.852600399015905,"endHours":10.228893991050159,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:41","end":"07:59","startHours":7.688912244818952,"endHours":7.989947118446354,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:29","end":"13:14","startHours":12.486655543255674,"endHours":13.23924272732418,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:43","end":"06:28","startHours":5.713370886639124,"endHours":6.4659580707076305,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:17","end":"07:13","startHours":6.277811274690504,"endHours":7.218545254776136,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:45","end":"15:30","startHours":14.744417095461191,"endHours":15.497004279529698,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:18","end":"18:42","startHours":18.30735301580372,"endHours":18.70735301580372,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:30","end":"18:59","startHours":18.50735301580372,"endHours":18.977720005846535,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:15","end":"20:00","startHours":18.25735301580372,"endHours":20.00735301580372,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:29","end":"01:14","startHours":24.486655543255676,"endHours":25.23924272732418,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"07:13","end":"08:38","startHours":7.218545254776136,"endHours":8.629646224904583,"quality":"neutral"},{"name":"Labha","start":"08:38","end":"10:02","startHours":8.629646224904583,"endHours":10.040747195033031,"quality":"auspicious"},{"name":"Amṛta","start":"10:02","end":"11:27","startHours":10.040747195033031,"endHours":11.45184816516148,"quality":"auspicious"},{"name":"Kāla","start":"11:27","end":"12:52","startHours":11.45184816516148,"endHours":12.862949135289927,"quality":"inauspicious"},{"name":"Śubha","start":"12:52","end":"14:16","startHours":12.862949135289927,"endHours":14.274050105418375,"quality":"auspicious"},{"name":"Roga","start":"14:16","end":"15:41","startHours":14.274050105418375,"endHours":15.685151075546823,"quality":"inauspicious"},{"name":"Udveg","start":"15:41","end":"17:06","startHours":15.685151075546823,"endHours":17.09625204567527,"quality":"inauspicious"},{"name":"Chala","start":"17:06","end":"18:30","startHours":17.09625204567527,"endHours":18.50735301580372,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"18:30","end":"20:06","startHours":18.50735301580372,"endHours":20.09625204567527,"quality":"inauspicious"},{"name":"Udveg","start":"20:06","end":"21:41","startHours":20.09625204567527,"endHours":21.685151075546823,"quality":"inauspicious"},{"name":"Chala","start":"21:41","end":"23:16","startHours":21.685151075546823,"endHours":23.274050105418375,"quality":"neutral"},{"name":"Labha","start":"23:16","end":"00:52","startHours":23.274050105418375,"endHours":24.862949135289927,"quality":"auspicious"},{"name":"Amṛta","start":"00:52","end":"02:27","startHours":24.862949135289927,"endHours":26.45184816516148,"quality":"auspicious"},{"name":"Kāla","start":"02:27","end":"04:02","startHours":26.45184816516148,"endHours":28.04074719503303,"quality":"inauspicious"},{"name":"Śubha","start":"04:02","end":"05:38","startHours":28.04074719503303,"endHours":29.629646224904583,"quality":"auspicious"},{"name":"Roga","start":"05:38","end":"07:13","startHours":29.629646224904583,"endHours":31.218545254776135,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:13","end":"08:13","startHours":7.218545254776136,"endHours":8.218545254776135,"planetary_lord":"Venus"},{"name":"Hora 2","start":"08:13","end":"09:13","startHours":8.218545254776135,"endHours":9.218545254776135,"planetary_lord":"Sun"},{"name":"Hora 3","start":"09:13","end":"10:13","startHours":9.218545254776135,"endHours":10.218545254776135,"planetary_lord":"Mars"},{"name":"Hora 4","start":"10:13","end":"11:13","startHours":10.218545254776135,"endHours":11.218545254776135,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"11:13","end":"12:13","startHours":11.218545254776135,"endHours":12.218545254776135,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"12:13","end":"13:13","startHours":12.218545254776135,"endHours":13.218545254776135,"planetary_lord":"Moon"},{"name":"Hora 7","start":"13:13","end":"14:13","startHours":13.218545254776135,"endHours":14.218545254776135,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"14:13","end":"15:13","startHours":14.218545254776135,"endHours":15.218545254776135,"planetary_lord":"Venus"},{"name":"Hora 9","start":"15:13","end":"16:13","startHours":15.218545254776135,"endHours":16.218545254776135,"planetary_lord":"Sun"},{"name":"Hora 10","start":"16:13","end":"17:13","startHours":16.218545254776135,"endHours":17.218545254776135,"planetary_lord":"Mars"},{"name":"Hora 11","start":"17:13","end":"18:13","startHours":17.218545254776135,"endHours":18.218545254776135,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"18:13","end":"19:13","startHours":18.218545254776135,"endHours":19.218545254776135,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"19:13","end":"20:13","startHours":19.218545254776135,"endHours":20.218545254776135,"planetary_lord":"Moon"},{"name":"Hora 14","start":"20:13","end":"21:13","startHours":20.218545254776135,"endHours":21.218545254776135,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"21:13","end":"22:13","startHours":21.218545254776135,"endHours":22.218545254776135,"planetary_lord":"Venus"},{"name":"Hora 16","start":"22:13","end":"23:13","startHours":22.218545254776135,"endHours":23.218545254776135,"planetary_lord":"Sun"},{"name":"Hora 17","start":"23:13","end":"00:13","startHours":23.218545254776135,"endHours":24.218545254776135,"planetary_lord":"Mars"},{"name":"Hora 18","start":"00:13","end":"01:13","startHours":24.218545254776135,"endHours":25.218545254776135,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"01:13","end":"02:13","startHours":25.218545254776135,"endHours":26.218545254776135,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"02:13","end":"03:13","startHours":26.218545254776135,"endHours":27.218545254776135,"planetary_lord":"Moon"},{"name":"Hora 21","start":"03:13","end":"04:13","startHours":27.218545254776135,"endHours":28.218545254776135,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"04:13","end":"05:13","startHours":28.218545254776135,"endHours":29.218545254776135,"planetary_lord":"Venus"},{"name":"Hora 23","start":"05:13","end":"06:13","startHours":29.218545254776135,"endHours":30.218545254776135,"planetary_lord":"Sun"},{"name":"Hora 24","start":"06:13","end":"07:13","startHours":30.218545254776135,"endHours":31.218545254776135,"planetary_lord":"Mars"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"unfavorable_nakshatras":["Ārdrā","Punarvasu","Puṣya","Aśleṣā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Vṛṣabha","Karka","Kanyā","Dhanu","Makara"],"unfavorable_rashis":["Mithuna","Siṃha","Tulā","Vṛścika","Kumbha","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"South-West","rahuVasa":"South-East","anandadiYoga":{"name":"Ānanda","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":-17.37751561227062,"eotMinutes":-13.689348117395623,"ayanamsa":23.5748}},"calendars":{"vikram_samvat":2037,"vikram_samvatsara":"Śrīmukha","saka_samvat":1902,"saka_samvatsara":"Raudra","bengali_samvat":1387,"malayalam_era":1156,"nanakshahi_year":511,"lunar_month":"Phālguna","lunar_month_paksha_full":"Phālguna Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Phālguna","lunar_month_amanta":"Māgha","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":"Phālguna Kṛṣṇa Pratipada · Vikram 2037 Śrīmukha · Śaka 1902 Raudra"},"festivals":[],"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":[]},"validity":{"eternal":false,"location_specific":"thane"},"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, 1980 CE · Thane, Maharashtra · Vidhyamitra","description":"February 1, 1980 CE for Thane, Maharashtra: Kṛṣṇa Pratipada, sūryodaya 07:13, sūryāsta 18:30.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/thane/1980-02-01","hreflang_alternates":{"en":"https://vidhyamitra.com/city/thane/1980-02-01","sa":"https://sa.vidhyamitra.com/city/thane/1980-02-01","hi":"https://hi.vidhyamitra.com/city/thane/1980-02-01","x-default":"https://vidhyamitra.com/city/thane/1980-02-01"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T14:38:09.086Z","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":"2026-05-31T14:38:09.086Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T14:38:09.086Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}