Trajectorize

KSP Trajectory Optimizer.

This project is a reduced-scope version of one of my other (currently incomplete) projects, as an intermediate stepping stone.

This tool computes trajectories between celestial bodies in KSP based on on-rails two-body patched conics, incorporating trajectory correction maneuvers for a variety of mission scenarios, such as:

• Ballistic Hohmann transfers for other planets
• Gravity assist flyby routes

Computationally-intensive code is implemented in C, with a Python wrapper made using cffi. C code follows mostly C89, with some C99 features used. It has been tested against the latest versions of GCC (on Linux) and MSVC (on Windows 10).

Installation

The package is still in development at this time, but you can install it from source.

Run pip install git+https://github.com/itchono/trajectorize to install the package. You will need to have Python 3.8+, and a C compiler installed to compile the C code.

Other Python dependencies are included inside pyproject.toml, and will be installed automatically.

Demos

Right now, full functionality is incomplete. There are, however, some cool demos showing off the capabilities of the package.

Full Model of KSP Planetary System and Ephemerides

python -m trajectorize.demos.kerbol_system_anim

Propagation of Two-Body Trajectories Using Universal Keplerian Elements

python -m trajectorize.demos.orbit

Inspirations

• Interactive illustrated interplanetary guide and calculator for KSP, by Olex
• This tool, by AlexMoon