After proving that the technology to map planets from orbit was proven with the earlier K-SCAN mission, a new probe was assembled to make the journey to Mun to perform the same task. Here it would be much more important to obtain surface data for use in future missions, both kerbed and unkerbed. The Mu-SCAN probe also carried along a gravioli and radiation detector for a secondary mission of gathering new scientific data around Mun.
Render of Mu-SCAN in orbit with all instruments fully deployed – click to view Flight Tracker