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We propose to use a modest fraction of the re-purposed Kepler mission timeand apertures to greatly increase the quantity and quality of our knowledge ofnear-Earth asteroids (NEAs) rotation and shape. NEAs are important forunderstanding the origins of the Solar System, for selecting targets forrobotic and human visits, and for hazardous object deflection. While NEAs arebeing discovered at a rate of 1000/year, only a ~75/year have well-measuredrotation periods and shapes. Not only can the Kepler mission greatly increasethe numbers of well-determined NEA rotation periods (to >1000 in 5 years), butmay do so with order-of-magnitude greater precision than is routinely achievedfrom the ground. This will enable 3-D tomographic maps to be produced for the~250 of the brighter NEAs. A multi-year science program would enable improveddata quality checks, larger samples and additional types of science. All thesenumbers are preliminary. We list a number of issues to be resolved before thisprogram can be properly assessed.

Alternate Science Investigations for the Kepler Spacecraft: Precision Rotation Periods and Shapes of Near-Earth Asteroids