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NASA Innovative Advanced Concepts

Pluto Hop, Skip, and Jump

Active Technology Project

Project Introduction

Pluto Hop, Skip, and Jump
Imagine a craft that could enter Pluto’s atmosphere at 14 km/s and deliver a 200 kg lander to the surface using aerodynamic drag and just a few kg of propellant. Pluto’s surface pressure is just 10 millionths of Earth’s, but its atmosphere is about 7 times higher than Earth’s and its volume is about 350 times the volume of Pluto itself. Over a several hundred kilometer entry distance, this ultra-low ballistic coefficient craft can dissipate over 99.999% of its initial kinetic energy, resulting in a terminal velocity comparable to or less than past planetary landers or rovers. With this architecture, the total propellant requirement for landing on Pluto is less than 3.5 kg! After making science measurements at its initial landing site, the lander switches to “hopper” mode, taking advantage of the low gravitational acceleration (0.063 gee) and a modest propellant store to literally hop, skip, and jump around the surface, sometimes kilometers at a time, investigating features of interest. The proposed concept would enable in-situ surface science at Pluto with low overall mass, a reasonable cost, and in a timeframe of about 10-15 years. More »

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