Model-based Systems Engineering (MBSE) is a turning point for companies in the manufacturing and engineering sectors that in recent years have increasingly understood the need to digitize themselves, satisfy the growing demand to produce new technologies, supply quality products and services in a short time with low costs. Its use could also bring benefits to the development of CubeSat missions, which until now has been done through document-based approaches. This thesis aims to improve and enrich the first phases of the SROC (Space Rider Observer Cube) space mission project, a small satellite capable of rendezvous and docking, through the construction of models to describe its different areas and realize through reverse engineering an MBSE procedure for similar missions.