Orbit reconstruction, simulation and analysis (orsa) is a framework for celestial mechanics investigations. the main goals of the project are the implementation of state of the art orbit integration algorithms, with concerns on accuracy and performance, and the development of a number of analysis tools.

this package contains xorsa, the main graphical application provided by the orsa project. it is an interactive tool for scientific grade celestial mechanics computations. asteroids, comets, artificial satellites, solar, and extra-solar planetary systems can be accurately reproduced, simulated and analyzed.