Table 5.

Planetary protection categories for different types of missions to Ceres

Mission type		Category	Note
Lander/Rover	Most part of the surface	II*	Like Dawn, the mission is at least Category III if it includes a Mars gravity assist.
	Occator faculae	IV
Sample return	Different possible sites, including organic-rich areas	V	Determination on the sub-category of being “restricted” or “unrestricted” depends on location.

Further information to be found in Castillo-Rogez, J. C. et al. “Planetary Protection Requirements for Future Exploration of Ceres–State of Understanding after the Dawn Mission” (in revisions)