After dropping off one of the pilots at the Charon Ground Outpost, a kerbal is sent back in the Pluto Exploration Vehicle to visit Pluto's outermost and second largest moon, Hydra, approximately 100 KM across. Low gravity awaits. Flags are planted and the vehicle returns to Charon.
Comment below on suggestions for future missions, based out of Charon and the Pluto system, to the Kuiper Belt or Scattered Disc. Choices include Orcus, Eris, 2007 OR10, Quaoar and many more, as well as moons. Try to limit suggestions to objects with a diameter of greater than 200 kilometers.
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