A fast implementation of the VSOP87 theory in JavaScript.
Bundle for astronomical calculations such as position of moon, sun and planets, sunrise, sunset or solar eclipses. Most of the calculations are based on Jean Meeus 'Astronomical Algorithms' book and the VSOP87 theory.
Professional astronomical calculation engine — VSOP87, ELP/MPP02 (LLR calibrated), Placidus houses, eclipses, Vedic Panchanga. 107/107 tests PASS vs JPL Horizons DE441.
A library for dates in the Badí' (or Bahá'í) calendar.
solar_terms by js
This package is created for calcultating main planets of solar system heliocentric ecliptic coordinate.
A library for dates in the Badí' (or Bahá'í) calendar. This version is adapted for updated libraries and fixed early date leap years issue
BaZi (Four Pillars / 八字) — deterministic Chinese metaphysics MCP server. Rule-based engine, no LLM drift. Sub-200ms response. Pay-per-call via x402 USDC on Base. First 3 calls free per UA.
WebAssembly bindings for shaum - Islamic fasting rules engine
nutation by js
No-BS astrological calculations validated against NASA, JPL Horizons & Swiss Ephemeris. Birth charts, transits, progressions. Powers cosmolytic.com.
Chinese calendar, astronomy, and 干支 (Heavenly Stems & Earthly Branches) computation library
Pure Rust VSOP87 algorithm implementation. Includes all VSOP87 algorith versions: VSOP87, VSOP87A, VSOP87B, VSOP87C, VSOP87D and VSOP87E. VSOP87 are a family of algorithms used to predict the position of planets in the solar system with great accuracy. That position can be used by astronomical software to create views of the sky, or by simulation software to know the position of the planets.
High-precision astronomy and satellite mechanics in Rust.
Planetary position computation for XALEN Ephemeris — VSOP87 analytical + JPL DE support
Jyotish — astronomical computation engine for planetary positions, calendar systems, and celestial event prediction
A library to predict the position of the Sun
Astronomical calculator for Bikram Sambat calendar based on solar and lunar positions. High-performance Nepali (Bikram Sambat) datetime library with multi-language bindings
Reusable Rust bindings for the Siderust Archive: manifests, checksums, provenance, and runtime download of scientific datasets (IERS time data, kernels, planetary theories).
XALEN Ephemeris — next-generation astronomical library — pure Rust, thread-safe, Vedic-first
WASM bindings for XALEN Ephemeris — run in any browser or Node.js