AstroCoords.jl

This package is intended to be a one stop shop for all things related to astrodynamics coordinate systems. In addition to being non-allocating and highly performant all transformations found here are also differentiable with compatibility with a number of different automatic and finite differencing schemas.

Currently this package implements:

• [x] Cartesian
• [x] Keplerian
• [x] Delaunay
• [x] Modified Equinoctial
• [x] Spherical
• [x] Cylindrical
• [x] Unified State Model
  • [x] USM7
  • [x] USM6
  • [x] USMEM
• [x] Milankovich
• [x] Generalized Equinoctial Orbital Elements
• [x] Poincaré
• [x] EDROMO
• [x] Kustaanheimo-Stiefel
• [x] Stiefel-Scheifel

This package may eventually support Attitude Coordinates as well.

Installation

julia> using Pkg
julia> Pkg.add("AstroCoords")

Documentation

For more information, see the [documentation][docs-dev-url].

Citing

If you use AstroCoords.jl in your work, please consider citing it.

@software{jordan_murphy_2025_16954330,
  author       = {Jordan Murphy},
  title        = {HAMMERHEAD-Space/AstroCoords.jl},
  publisher    = {Zenodo},
  doi          = {10.5281/zenodo.16954330},
  url          = {https://doi.org/10.5281/zenodo.16954330},
}