 This was designed as an L-Class flagship level mission; however, it is constrained by the need for RTGs.MUSE was also analyzed in the US as an Enhanced New Frontiers class mission in 2014.The orbiter science phase would consist on the Uranus Science Orbit (USO) phase of approximately 2 years in a highly elliptic polar orbit to provide best gravimetry data, during which 36 Uranus orbits are performed.