  The New Horizons spacecraft, launched by NASA in 2006, will arrive in the
Pluto-Charon system on July 14, 2015. There, it will spend a few hours imaging
Pluto and its moons. It will then have a small amount of reserve propellant
which will be used to direct the probe on to a second, yet to be discovered
object in the Kuiper Belt. Data from the MegaPrime camera on CFHT was used to
build a precise, high density astrometric reference frame for both the final
approach into the Pluto system and the search for the secondary target. Pluto
currently lies in the galactic plane. This is a hindrance in that there are
potential problems with confusion. However, it is also a benefit, since it
allows the use of the UCAC4 astrometric reference catalog, which is normally
too sparse for use with MegaCam images. The astrometric accuracy of the final
catalogs, as measured by the residuals, is 0.02 arcseconds.
