Tone is annoying but the question is good. Here's some background on why this is being done: http://echo.jpl.nasa.gov/introduction.html http://echo.jpl.nasa.g

Tone is annoying but the question is good. Here's some background on why this is being done: http://echo.jpl.nasa.gov/introduction.html http://echo.jpl.nasa.gov/introduction.html Briefly: asteroid geology, better orbit prediction through understanding of mass distribution, modeling for evolution of solar system studies. There would have to be a rationale, because time on the telescopes is limited.