An example of ephemeris calculation with different toolkits and sources: NASA/NAIF SPICE toolkit with JPL DE440 ephemeris and IAA RAS EPM 2021 ephemeris
Vedaksha — clean-room Vedic astrology & astronomical ephemeris engine (kundali, panchanga, dashas, nakshatras, vargas) with sub-arcsecond precision. Rust, Python, WebAssembly, and an MCP server for AI agents.
JPL DE440s をブラウザ内で直読みする高精度天文・占星術計算アプリ。サーバー不要・Swiss Ephemeris 非依存・MIT ライセンス / Browser-based astrological calculator using JPL DE440s directly. No server, no Swiss Ephemeris. Natal, horary, progressions & more.
占星術計算の全ステップを可視化する計算トレースビューア。JPL DE440s + 独自BSPリーダー / Swiss Ephemeris非依存 / ブラウザ完結 / Astrological calculation trace viewer — step-by-step visualization with JPL DE440s. Swiss Ephemeris-free, browser-only.
Solar System visualiser & high-accuracy numerical integrator for Windows: orbit propagation with JPL ephemerides, an OpenGL 3D viewer, TLE/Horizons/SBDB target import, and an eclipse & occultation observation planner.
Idiomatic Dart bindings for the Taiyin ephemeris C API.
Python bindings for Taiyin Ephemeris
How long can a cislunar object go unobserved before ground telescopes lose it? Custody horizons for angles-only tracking of NRHO, halo, Lyapunov and DRO orbits — CR3BP + JPL DE440, EKF/UKF/GM-UKF/particle filters, Monte Carlo.
C++ implementation of EKF_GEOS3, an Extended Kalman Filter for GEOS-3 satellite orbit determination. Features custom matrix algebra, JPL DE430 ephemerides, IERS corrections, and full astrodynamics modeling.
High-precision Vedic Panchang engine for PHP/Laravel with JPL Ephemeris, festivals, muhurta, eclipses, and raw JSON export.
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