{"id":"vidhyamitra:day:2325-09-13:en","page_class":"VM-1-day","url":"https://vidhyamitra.com/day/2325-09-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2325-09-13","date_display":"September 13, 2325 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":2325,"month":9,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2570503.770833,"kali_year":5427,"ahargana":1982038.2708,"sun":{"sidereal_longitude":140.0683,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":194.388,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":5,"name":"Pañcamī","paksha":"Śukla","full_name":"Śukla Pañcamī","elongation_degrees":54.3197,"elapsed_within_tithi_degrees":6.3197},"nakshatra":{"number":15,"name":"Svātī","pada":3,"moon_longitude":194.388,"elapsed_within_degrees":7.7213},"yoga":{"number":26,"name":"Indra","sum_longitude":334.4562},"karana":{"half_tithi_index":9,"name":"Bālava"},"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":2325,"month":9,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2570503.770833,"ahargana":1982038.2708,"kali_year":5427,"ayanamsa_lahiri":28.4027,"grahas":{"sun":{"sidereal_longitude":141.569911,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false},"moon":{"sidereal_longitude":191.561911,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":2},"retrograde":false,"latitude":-4.4963},"mars":{"sidereal_longitude":72.93871100000001,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":148.00841100000002,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":true},"jupiter":{"sidereal_longitude":165.28081100000009,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"venus":{"sidereal_longitude":170.786111,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":true},"saturn":{"sidereal_longitude":46.87381099999999,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":282.0742,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":102.0742,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","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":2325,"month":9,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2570503.770833,"kali_year":5427,"ahargana":1982038.2708,"sun":{"sidereal_longitude":140.0683,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":194.388,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":5,"name":"Pañcamī","paksha":"Śukla","full_name":"Śukla Pañcamī","elongation_degrees":54.3197,"elapsed_within_tithi_degrees":6.3197},"nakshatra":{"number":15,"name":"Svātī","pada":3,"moon_longitude":194.388,"elapsed_within_degrees":7.7213},"yoga":{"number":26,"name":"Indra","sum_longitude":334.4562},"karana":{"half_tithi_index":9,"name":"Bālava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.496,"elongation":54.32},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.496,"opposition_distance":125.68}},"eclipse_window_40days":[]},"calendars":{"vikram_samvat":2382,"vikram_samvatsara":"Kālayukta","saka_samvat":2247,"saka_samvatsara":"Viśvāvasu","bengali_samvat":1732,"malayalam_era":1501,"nanakshahi_year":856,"lunar_month":"Bhādrapada","lunar_month_paksha_full":"Bhādrapada Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Bhādrapada","lunar_month_amanta":"Bhādrapada","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Siṃha (Āvaṇi)","ritu":"Varṣā (Monsoon)","display_summary":"Bhādrapada Śukla Pañcamī · Vikram 2382 Kālayukta · Śaka 2247 Viśvāvasu"},"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,"valid_from":"2325-09-13T00:00:00Z"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate; Vidhyamitra substrate"},"seo":{"title":"Pañchāṅga September 13, 2325 CE · Vidhyamitra","description":"Vedic pañchāṅga for September 13, 2325 CE: Śukla Pañcamī · Svātī.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/day/2325-09-13","hreflang_alternates":{"en":"https://vidhyamitra.com/day/2325-09-13","sa":"https://sa.vidhyamitra.com/day/2325-09-13","hi":"https://hi.vidhyamitra.com/day/2325-09-13","x-default":"https://vidhyamitra.com/day/2325-09-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-03T22:18:51.198Z","verification":{"type":"multi-marker","confidence":"canonical"}}],"meta":{"generated_at":"2026-06-03T22:18:51.198Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa"}}}