{"id":"vidhyamitra:city-day:solapur:1981-04-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/solapur/1981-04-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-04-13","date_display":"April 13, 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":4,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444707.770833,"kali_year":5082,"ahargana":1856242.2708,"sun":{"sidereal_longitude":359.6224,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":105.945,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":106.3226,"elapsed_within_tithi_degrees":10.3226},"nakshatra":{"number":8,"name":"Puṣya","pada":4,"moon_longitude":105.945,"elapsed_within_degrees":12.6117},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":105.5674},"karana":{"half_tithi_index":17,"name":"Kaulava"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"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":4,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444707.770833,"ahargana":1856242.2708,"kali_year":5082,"ayanamsa_lahiri":23.5915,"grahas":{"sun":{"sidereal_longitude":359.443543,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"moon":{"sidereal_longitude":108.42974299999997,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":1},"retrograde":false,"latitude":-0.1103},"mars":{"sidereal_longitude":357.396643,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":344.722343,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":159.79284299999995,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"venus":{"sidereal_longitude":1.1791430000000105,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":161.343343,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":107.3516,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":287.3516,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":1981,"month":4,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444707.770833,"kali_year":5082,"ahargana":1856242.2708,"sun":{"sidereal_longitude":359.6224,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":105.945,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":106.3226,"elapsed_within_tithi_degrees":10.3226},"nakshatra":{"number":8,"name":"Puṣya","pada":4,"moon_longitude":105.945,"elapsed_within_degrees":12.6117},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":105.5674},"karana":{"half_tithi_index":17,"name":"Kaulava"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-0.11,"elongation":106.323},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-0.11,"opposition_distance":73.677}},"eclipse_window_40days":[]},"city":{"slug":"solapur","name":"Solapur, Maharashtra","lat":17.6599,"lon":75.9064,"tz_offset_hours":5.5,"state":"Maharashtra","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"solapur","name":"Solapur, Maharashtra","lat":17.6599,"lon":75.9064,"tz_offset_hours":5.5,"state":"Maharashtra","country":"IN","tier":"tier-1"},"sunriseLocal":"06:12","sunsetLocal":"18:42","solarNoonLocal":"12:27","dayLengthHours":12.501541221706708,"dayLengthDisplay":"12 Hours 30 Mins 06 Secs","nightLengthDisplay":"11 Hours 29 Mins 54 Secs","moonriseLocal":"13:18","moonsetLocal":"02:08","rahuKala":{"name":"Rāhu Kāla","start":"07:46","end":"09:20","startHours":7.76432555568839,"endHours":9.327018208401729,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:53","end":"12:27","startHours":10.889710861115066,"endHours":12.452403513828404,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:01","end":"15:35","startHours":14.015096166541744,"endHours":15.577788819255082,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:07","end":"09:32","startHours":9.118659188039949,"endHours":9.535377228763506,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:43","end":"07:03","startHours":6.722530453879497,"endHours":7.055904886458343,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:02","end":"12:52","startHours":12.035685473104847,"endHours":12.869121554551961,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:32","end":"05:22","startHours":4.534760740080824,"endHours":5.368196821527937,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:10","end":"06:12","startHours":5.159837801166159,"endHours":6.201632902975051,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:32","end":"15:22","startHours":14.53599371744619,"endHours":15.369429798893306,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:30","end":"18:54","startHours":18.50317412468176,"endHours":18.903174124681758,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:42","end":"19:13","startHours":18.70317412468176,"endHours":19.224071675586206,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:27","end":"20:12","startHours":18.45317412468176,"endHours":20.20317412468176,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:02","end":"00:52","startHours":24.03568547310485,"endHours":24.86912155455196,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"06:12","end":"07:46","startHours":6.201632902975051,"endHours":7.76432555568839,"quality":"auspicious"},{"name":"Kāla","start":"07:46","end":"09:20","startHours":7.76432555568839,"endHours":9.327018208401729,"quality":"inauspicious"},{"name":"Śubha","start":"09:20","end":"10:53","startHours":9.327018208401729,"endHours":10.889710861115066,"quality":"auspicious"},{"name":"Roga","start":"10:53","end":"12:27","startHours":10.889710861115066,"endHours":12.452403513828404,"quality":"inauspicious"},{"name":"Udveg","start":"12:27","end":"14:01","startHours":12.452403513828404,"endHours":14.015096166541744,"quality":"inauspicious"},{"name":"Chala","start":"14:01","end":"15:35","startHours":14.015096166541744,"endHours":15.577788819255082,"quality":"neutral"},{"name":"Labha","start":"15:35","end":"17:08","startHours":15.577788819255082,"endHours":17.14048147196842,"quality":"auspicious"},{"name":"Amṛta","start":"17:08","end":"18:42","startHours":17.14048147196842,"endHours":18.70317412468176,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"18:42","end":"20:08","startHours":18.70317412468176,"endHours":20.14048147196842,"quality":"neutral"},{"name":"Labha","start":"20:08","end":"21:35","startHours":20.14048147196842,"endHours":21.577788819255083,"quality":"auspicious"},{"name":"Amṛta","start":"21:35","end":"23:01","startHours":21.577788819255083,"endHours":23.015096166541746,"quality":"auspicious"},{"name":"Kāla","start":"23:01","end":"00:27","startHours":23.015096166541746,"endHours":24.452403513828404,"quality":"inauspicious"},{"name":"Śubha","start":"00:27","end":"01:53","startHours":24.452403513828404,"endHours":25.889710861115066,"quality":"auspicious"},{"name":"Roga","start":"01:53","end":"03:20","startHours":25.889710861115066,"endHours":27.32701820840173,"quality":"inauspicious"},{"name":"Udveg","start":"03:20","end":"04:46","startHours":27.32701820840173,"endHours":28.764325555688387,"quality":"inauspicious"},{"name":"Chala","start":"04:46","end":"06:12","startHours":28.764325555688387,"endHours":30.20163290297505,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"06:12","end":"07:12","startHours":6.201632902975051,"endHours":7.201632902975051,"planetary_lord":"Moon"},{"name":"Hora 2","start":"07:12","end":"08:12","startHours":7.201632902975051,"endHours":8.201632902975051,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"08:12","end":"09:12","startHours":8.201632902975051,"endHours":9.201632902975051,"planetary_lord":"Venus"},{"name":"Hora 4","start":"09:12","end":"10:12","startHours":9.201632902975051,"endHours":10.201632902975051,"planetary_lord":"Sun"},{"name":"Hora 5","start":"10:12","end":"11:12","startHours":10.201632902975051,"endHours":11.201632902975051,"planetary_lord":"Mars"},{"name":"Hora 6","start":"11:12","end":"12:12","startHours":11.201632902975051,"endHours":12.201632902975051,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"12:12","end":"13:12","startHours":12.201632902975051,"endHours":13.201632902975051,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"13:12","end":"14:12","startHours":13.201632902975051,"endHours":14.201632902975051,"planetary_lord":"Moon"},{"name":"Hora 9","start":"14:12","end":"15:12","startHours":14.201632902975051,"endHours":15.201632902975051,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"15:12","end":"16:12","startHours":15.201632902975051,"endHours":16.20163290297505,"planetary_lord":"Venus"},{"name":"Hora 11","start":"16:12","end":"17:12","startHours":16.20163290297505,"endHours":17.20163290297505,"planetary_lord":"Sun"},{"name":"Hora 12","start":"17:12","end":"18:12","startHours":17.20163290297505,"endHours":18.20163290297505,"planetary_lord":"Mars"},{"name":"Hora 13","start":"18:12","end":"19:12","startHours":18.20163290297505,"endHours":19.20163290297505,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"19:12","end":"20:12","startHours":19.20163290297505,"endHours":20.20163290297505,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"20:12","end":"21:12","startHours":20.20163290297505,"endHours":21.20163290297505,"planetary_lord":"Moon"},{"name":"Hora 16","start":"21:12","end":"22:12","startHours":21.20163290297505,"endHours":22.20163290297505,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"22:12","end":"23:12","startHours":22.20163290297505,"endHours":23.20163290297505,"planetary_lord":"Venus"},{"name":"Hora 18","start":"23:12","end":"00:12","startHours":23.20163290297505,"endHours":24.20163290297505,"planetary_lord":"Sun"},{"name":"Hora 19","start":"00:12","end":"01:12","startHours":24.20163290297505,"endHours":25.20163290297505,"planetary_lord":"Mars"},{"name":"Hora 20","start":"01:12","end":"02:12","startHours":25.20163290297505,"endHours":26.20163290297505,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"02:12","end":"03:12","startHours":26.20163290297505,"endHours":27.20163290297505,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"03:12","end":"04:12","startHours":27.20163290297505,"endHours":28.20163290297505,"planetary_lord":"Moon"},{"name":"Hora 23","start":"04:12","end":"05:12","startHours":28.20163290297505,"endHours":29.20163290297505,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"05:12","end":"06:12","startHours":29.20163290297505,"endHours":30.20163290297505,"planetary_lord":"Venus"}],"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","Karka","Kanyā","Dhanu","Makara"],"unfavorable_rashis":["Mithuna","Siṃha","Tulā","Vṛścika","Kumbha","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"South-West","rahuVasa":"North-East","anandadiYoga":{"name":"Maitra","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring) (tropical)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":8.953356061645046,"eotMinutes":-0.7698108297043191,"ayanamsa":23.5915}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Caitra","lunar_month_amanta":"Caitra","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mīna (Paṅkuṇi)","ritu":"Vasanta (Spring)","display_summary":"Caitra Śukla Navamī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"rama-navami","name":"Rāma Navamī","name_sanskrit":"राम नवमी","tradition":"Vaishnava","associated_deity":"Rāma (18th avatāra of Krishna)","deity_avatara_index":18,"significance":"Bhagavān Rāma's birth at Ayodhyā. Sūryavaṃśa's most exalted moment.","vrata":true,"primary_observance":"Madhyāhna (noon) abhiṣekam in Ayodhyā tradition","detection":{"tithi_number":9,"tithi_paksha":"Śukla","lunar_month":"Caitra"},"precedence":1,"related_chart":"rama","historical_anchor":{"event":"Bhagavān Rāma's birth at Ayodhyā","date_julian":"-1626101-04-03","location":"Ayodhyā"},"sources":["Vālmīki Rāmāyaṇa, Bāla-Kāṇḍa 1.18"]},{"id":"mesha-sankranti","name":"Meṣa Saṅkrānti (Vaiśākhī / Vishu / Pohelā Boishākh / Bihu)","name_sanskrit":"मेष सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Aries; solar new year. Regional: Vaiśākhī (Punjab) · Vishu (Kerala) · Pohelā Boishākh (Bengal) · Bihu (Assam) · Tamil Puthāṇḍu.","vrata":false,"detection":{"sun_rashi_ingress":"Meṣa"},"precedence":1},{"id":"baisakhi","name":"Baisakhi (Vaiśākhī)","name_sanskrit":"वैशाखी","tradition":"Regional","associated_deity":"Sūrya + Khalsa Pantha (Sikh)","significance":"Punjab New Year + Sikh Khalsa founding day.","vrata":false,"detection":{"sun_rashi_ingress":"Meṣa"},"precedence":2}],"todays_walk":{"walk":{"id":"rama-navami-walk","name":"Rāma Navamī Walk","name_sanskrit":"राम नवमी यात्रा","type":"festival","description":"Vālmīki Bāla-Kāṇḍa selections + BG 4.7-8 (avatāra principle).","step_count":9,"url":"/walk/rama-navami-walk"},"reason":"Today is Rāma Navamī — its dedicated walk."},"cosmic_resonances":[{"historical_date":"-1626101-04-03","event":"Bhagavān Rāma's birth at Ayodhyā","chart_id":"rama","shared_marker":"same Śukla Navamī","url":"/day/-1626101-04-03","relevance":0.5}]},"validity":{"eternal":false,"location_specific":"solapur"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga April 13, 1981 CE · Solapur, Maharashtra · Vidhyamitra","description":"April 13, 1981 CE for Solapur, Maharashtra: Śukla Navamī, sūryodaya 06:12, sūryāsta 18:42.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/solapur/1981-04-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/solapur/1981-04-13","sa":"https://sa.vidhyamitra.com/city/solapur/1981-04-13","hi":"https://hi.vidhyamitra.com/city/solapur/1981-04-13","x-default":"https://vidhyamitra.com/city/solapur/1981-04-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T03:58:13.299Z","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":"2026-05-31T03:58:13.299Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T03:58:13.299Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}