I have an assignment where I have to simulate a Mars re-entry using the Viking capsule. I have finished it but now I want to go further and try to make my capsule glide. For this I need to enslave the path angle which needs the moment of inertia $J$ according to the formulas given by my teacher.
After reading a lot of reports by NASA, I'm beginning to despair of finding that moment of inertia... Maybe I can calculate it using simplification but my domain is more computer science than mechanics.
My question is: Where can I find the moment of inertia? If I need to calculate it, how to do this?