OREKIT is a free low level space dynamics library written in Java. Please visit our Gitlab instance for issues and contributions: https://gitlab.orekit.org
Gauss-Radau Small-body Simulator
Versatile astrodynamics / space mission simulator. n-body orbital mechanics, maneuvers, perturbations and more.
Some Orbital Mechanics Matlab Codes. Heavily based on the "Orbital Mechanics for Engineers, Howard D. Curtis" book.
A Rust package for the SGP-4 orbital propagator.
OrbMod (Orbit Modeling) - tools for numerical modeling of orbits: propagation and fitting to observations.
Fast, accessible, accurate orbit propagator for spacecraft
Outfit is a Rust library for orbit determination and propagation of small Solar System bodies, with support for MPC, ADES, Parquet, Gauss IOD, and JPL ephemerides.
Satellite TLE Orbit Propagation as a Service. gRPC API for USSF SGP4 / SGP4‑XP (Extended Perturbations) propagator. Catalog‑scale satellite processing, ephemeris generation, and built‑in mem. management. Written in Go
High Precision Lunar Orbit Propagator
Codework for Orbit Propagation and Line-Of-Site Visibility Analysis using TLEs
Uncertainty-first orbit propagation, ephemeris generation, orbit determination, and event detection for asteroids and comets, powered by automatic differentiation.
Rust foundations for typed Keplerian dynamics, anomaly solvers, two-body propagation, Lambert transfers, and orbital mechanics.
The MATLAB model here presented performs trajectory propagations based on the Constant Density Polyhedron algorithm. With this model, it is possible to compute trajectories in the proximity of astronomical bodies such as asteroids or comets. The algorithm also allows to compute ballistic trajectories.
Runnable Python walkthroughs of the explore-mode planetary-science scenarios on empyrean-dynamics.com
轻量、离线优先的卫星条带规划、TLE/SGP4 轨道传播、访问窗口、覆盖分析与 H3 网格工作台。
Cross-channel validation framework for the empyrean astrodynamics stack — schema, test catalog, plan generator, report renderer, and external-reference runners (ASSIST, find_orb, OpenOrb, Orbfit) shared by every empyrean repo's CI.
The propagator contract for THOR: the trait and state/ephemeris types every dynamical backend implements
Intuitive object-oriented library that simplifies orbital propagation for space missions.
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