llnl/ssatk
Space Situational Awareness Toolkit (SSATK): six-degree-of-freedom (6-DOF) orbit and attitude propagation, coordinate transforms, Lambertian brightness modeling, and 3D/interactive visualization for spacecraft from LEO to cislunar space.
GitHub repository with 6 stars and 1 forks.
Language: Python
Topics: observables, orbit-transfers, plotting, orbit-fit