They'll be dieing to spend billions for an asteroid detection system on the moon after readin this

"Extend the Spaceguard Survey, currently focused on finding and cataloging 1-
km-class objects and larger, to include finding and cataloging 100-m-class NEOs
and larger. These smaller objects pose a significant portion of the impact hazard.
This task can be accomplished by relatively inexpensive telescopic and/or spacecraft
systems; however, a substantial increase in the funding base beyond the current level
of NASA funding (~$4.0 million per year) is required. This funding must be
maintained into the future to watch for long-period comets and rogue asteroids.

Develop and fund ground-based techniques as well as missions to several
asteroids to gather information that contributes to designing deflection missions.
Critical information includes object sizes and dynamics, object types (e.g., binary),
characteristics of surface and sub-surface materials, responses to explosive and
impact forces, and characteristics relating to attaching a spacecraft or other large
structures to NEOs. Without these studies there is a potential to make matters worse
by an inappropriate response."

Regards,
Mark