{"id":"vidhyamitra:city-day:sabarimala:1981-02-01:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/sabarimala/1981-02-01","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-02-01","date_display":"February 1, 1981 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":1981,"month":2,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444636.770833,"kali_year":5082,"ahargana":1856171.2708,"sun":{"sidereal_longitude":288.5728,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":240.9906,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":27,"name":"Dvādaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvādaśī","elongation_degrees":312.4178,"elapsed_within_tithi_degrees":0.4178},"nakshatra":{"number":19,"name":"Mūla","pada":1,"moon_longitude":240.9906,"elapsed_within_degrees":0.9906},"yoga":{"number":13,"name":"Vyāghāta","sum_longitude":169.5634},"karana":{"half_tithi_index":52,"name":"Kaulava"},"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":1981,"month":2,"day":1,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444636.770833,"ahargana":1856171.2708,"kali_year":5082,"ayanamsa_lahiri":23.5888,"grahas":{"sun":{"sidereal_longitude":288.5093549999999,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"moon":{"sidereal_longitude":241.33475499999997,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false,"latitude":3.4519},"mars":{"sidereal_longitude":302.03965500000004,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":307.05585500000007,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":166.770755,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":3},"retrograde":true},"venus":{"sidereal_longitude":272.671555,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":165.81035500000007,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":111.1135,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":291.1135,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":1981,"month":2,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444636.770833,"kali_year":5082,"ahargana":1856171.2708,"sun":{"sidereal_longitude":288.5728,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":240.9906,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":27,"name":"Dvādaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvādaśī","elongation_degrees":312.4178,"elapsed_within_tithi_degrees":0.4178},"nakshatra":{"number":19,"name":"Mūla","pada":1,"moon_longitude":240.9906,"elapsed_within_degrees":0.9906},"yoga":{"number":13,"name":"Vyāghāta","sum_longitude":169.5634},"karana":{"half_tithi_index":52,"name":"Kaulava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.452,"elongation":47.582},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.452,"opposition_distance":132.418}},"eclipse_window_40days":[{"offset_days":-12,"type":"lunar","occurs":true,"moon_latitude":-1.332,"opposition_distance":1.776},{"offset_days":4,"type":"solar","occurs":true,"moon_latitude":-0.15,"elongation":0.162}]},"city":{"slug":"sabarimala","name":"Sabarimalā (Ayyappa)","lat":9.4376,"lon":77.0808,"tz_offset_hours":5.5,"state":"Kerala","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"sabarimala","name":"Sabarimalā (Ayyappa)","lat":9.4376,"lon":77.0808,"tz_offset_hours":5.5,"state":"Kerala","country":"IN","tier":"tirtha"},"sunriseLocal":"06:44","sunsetLocal":"18:27","solarNoonLocal":"12:35","dayLengthHours":11.725552489429157,"dayLengthDisplay":"11 Hours 43 Mins 32 Secs","nightLengthDisplay":"12 Hours 16 Mins 28 Secs","moonriseLocal":"03:41","moonsetLocal":"15:13","rahuKala":{"name":"Rāhu Kāla","start":"16:59","end":"18:27","startHours":16.986517985492526,"endHours":18.45221204667117,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:35","end":"14:03","startHours":12.589435801956594,"endHours":14.055129863135237,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:31","end":"16:59","startHours":15.520823924313882,"endHours":16.986517985492526,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:28","end":"09:51","startHours":9.462621804775484,"endHours":9.853473554423122,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:13","end":"07:32","startHours":7.215224244301562,"endHours":7.527905644019673,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:12","end":"12:59","startHours":12.198584052308956,"endHours":12.980287551604231,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:10","end":"05:57","startHours":5.163252558651459,"endHours":5.944956057946737,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:45","end":"06:44","startHours":5.749530183122918,"endHours":6.726659557242014,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:33","end":"15:20","startHours":14.543694550194786,"endHours":15.325398049490063,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:15","end":"18:39","startHours":18.252212046671172,"endHours":18.65221204667117,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:27","end":"18:56","startHours":18.45221204667117,"endHours":18.94077673373072,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:12","end":"19:57","startHours":18.20221204667117,"endHours":19.95221204667117,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:12","end":"00:59","startHours":24.198584052308956,"endHours":24.98028755160423,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:44","end":"08:12","startHours":6.726659557242014,"endHours":8.19235361842066,"quality":"inauspicious"},{"name":"Chala","start":"08:12","end":"09:39","startHours":8.19235361842066,"endHours":9.658047679599303,"quality":"neutral"},{"name":"Labha","start":"09:39","end":"11:07","startHours":9.658047679599303,"endHours":11.123741740777948,"quality":"auspicious"},{"name":"Amṛta","start":"11:07","end":"12:35","startHours":11.123741740777948,"endHours":12.589435801956594,"quality":"auspicious"},{"name":"Kāla","start":"12:35","end":"14:03","startHours":12.589435801956594,"endHours":14.055129863135237,"quality":"inauspicious"},{"name":"Śubha","start":"14:03","end":"15:31","startHours":14.055129863135237,"endHours":15.520823924313882,"quality":"auspicious"},{"name":"Roga","start":"15:31","end":"16:59","startHours":15.520823924313882,"endHours":16.986517985492526,"quality":"inauspicious"},{"name":"Udveg","start":"16:59","end":"18:27","startHours":16.986517985492526,"endHours":18.45221204667117,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:27","end":"19:59","startHours":18.45221204667117,"endHours":19.986517985492526,"quality":"auspicious"},{"name":"Roga","start":"19:59","end":"21:31","startHours":19.986517985492526,"endHours":21.52082392431388,"quality":"inauspicious"},{"name":"Udveg","start":"21:31","end":"23:03","startHours":21.52082392431388,"endHours":23.055129863135235,"quality":"inauspicious"},{"name":"Chala","start":"23:03","end":"00:35","startHours":23.055129863135235,"endHours":24.589435801956594,"quality":"neutral"},{"name":"Labha","start":"00:35","end":"02:07","startHours":24.589435801956594,"endHours":26.123741740777948,"quality":"auspicious"},{"name":"Amṛta","start":"02:07","end":"03:39","startHours":26.123741740777948,"endHours":27.658047679599303,"quality":"auspicious"},{"name":"Kāla","start":"03:39","end":"05:12","startHours":27.658047679599303,"endHours":29.19235361842066,"quality":"inauspicious"},{"name":"Śubha","start":"05:12","end":"06:44","startHours":29.19235361842066,"endHours":30.726659557242016,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:44","end":"07:44","startHours":6.726659557242014,"endHours":7.726659557242014,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:44","end":"08:44","startHours":7.726659557242014,"endHours":8.726659557242014,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:44","end":"09:44","startHours":8.726659557242014,"endHours":9.726659557242014,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:44","end":"10:44","startHours":9.726659557242014,"endHours":10.726659557242014,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:44","end":"11:44","startHours":10.726659557242014,"endHours":11.726659557242014,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:44","end":"12:44","startHours":11.726659557242014,"endHours":12.726659557242014,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:44","end":"13:44","startHours":12.726659557242014,"endHours":13.726659557242014,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:44","end":"14:44","startHours":13.726659557242014,"endHours":14.726659557242014,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:44","end":"15:44","startHours":14.726659557242014,"endHours":15.726659557242014,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:44","end":"16:44","startHours":15.726659557242014,"endHours":16.726659557242016,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:44","end":"17:44","startHours":16.726659557242016,"endHours":17.726659557242016,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:44","end":"18:44","startHours":17.726659557242016,"endHours":18.726659557242016,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:44","end":"19:44","startHours":18.726659557242016,"endHours":19.726659557242016,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:44","end":"20:44","startHours":19.726659557242016,"endHours":20.726659557242016,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:44","end":"21:44","startHours":20.726659557242016,"endHours":21.726659557242016,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:44","end":"22:44","startHours":21.726659557242016,"endHours":22.726659557242016,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:44","end":"23:44","startHours":22.726659557242016,"endHours":23.726659557242016,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:44","end":"00:44","startHours":23.726659557242016,"endHours":24.726659557242016,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:44","end":"01:44","startHours":24.726659557242016,"endHours":25.726659557242016,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:44","end":"02:44","startHours":25.726659557242016,"endHours":26.726659557242016,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:44","end":"03:44","startHours":26.726659557242016,"endHours":27.726659557242016,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:44","end":"04:44","startHours":27.726659557242016,"endHours":28.726659557242016,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:44","end":"05:44","startHours":28.726659557242016,"endHours":29.726659557242016,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:44","end":"06:44","startHours":29.726659557242016,"endHours":30.726659557242016,"planetary_lord":"Jupiter"}],"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":["Vṛṣabha","Mithuna","Kanyā","Tulā","Dhanu","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Makara","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"East","rahuVasa":"North-East","anandadiYoga":{"name":"Siddhi","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":-17.16452117423323,"eotMinutes":-13.689348117395623,"ayanamsa":23.5888}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"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 Dvādaśī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"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":"sabarimala"},"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, 1981 CE · Sabarimalā (Ayyappa) · Vidhyamitra","description":"February 1, 1981 CE for Sabarimalā (Ayyappa): Kṛṣṇa Dvādaśī, sūryodaya 06:44, sūryāsta 18:27.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/sabarimala/1981-02-01","hreflang_alternates":{"en":"https://vidhyamitra.com/city/sabarimala/1981-02-01","sa":"https://sa.vidhyamitra.com/city/sabarimala/1981-02-01","hi":"https://hi.vidhyamitra.com/city/sabarimala/1981-02-01","x-default":"https://vidhyamitra.com/city/sabarimala/1981-02-01"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-03T19:12:00.286Z","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":"2026-06-03T19:12:00.286Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-03T19:12:00.286Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}