How I Built a Vedic Panchang Engine in TypeScript — Swiss Ephemeris, Meeus Fallback, Zero External APIs

May 17, 2026 · 9:38 AM UTC ·12 min read · 0 reactions · 0 comments · 38 views

#typescript #astronomy #algorithms #web development #vedic astrology

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The article describes the development of a Vedic Panchang engine in TypeScript that calculates astronomical data such as planetary positions, sunrise, and lunar cycles without relying on external APIs. It uses Swiss Ephemeris for high-precision calculations on the server, with a fallback to Meeus algorithms for environments where native modules are unavailable. The system is designed for accuracy and portability across different runtime environments.

Key facts

▪The Panchang engine computes all astronomical values locally on the server using either Swiss Ephemeris or Meeus algorithms.
▪Swiss Ephemeris provides sub-arcsecond accuracy and is used as the primary engine, while Meeus serves as a mathematical fallback.
▪The implementation includes memoization to optimize performance by caching Julian Day-based calculations.
▪Each Panchang consists of five components: Tithi, Nakshatra, Yoga, Karana, and Vara, all derived from precise astronomical computations.
▪The engine is integrated into a Next.js application and supports server-side computation without third-party services.

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Original publisher	DEV.to (Top)
Canonical URL	https://dev.to/krazykrackpot/how-i-built-a-vedic-panchang-engine-in-typescript-swiss-ephemeris-meeus-fallback-zero-external-3n5j
Publication time	Sun, 17 May 2026 09:38:48 +0000
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try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3936028) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Adi Kumar Posted on May 17 How I Built a Vedic Panchang Engine in TypeScript — Swiss Ephemeris, Meeus Fallback, Zero External APIs #algorithms #nextjs #typescript #mathematics Sub-arcsecond planetary positions, sunrise for any location on Earth, and an entire astronomical calendar — all computed server-side in a Next.js app.

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