On Fri, 17 Feb 2006 21:37:37 GMT, in a place far, far away, Orval
Fairbairn made the phosphor on my monitor
glow in such a way as to indicate that:

Why would anybody *want* such a long-duration parking orbit? The craft
could go stale if it is kept in orbit that long -- besides, the only
reason for an earth parking orbit is to extend the launch window from
some 3 minutes to several hours. It costs propellant to insert into park
and then inject into translunar.

Presumably to establish a propellant depot, which could pay for itself
in terms of the extra propellant for the insertion.