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by chakalakasp 3572 days ago
NASA and ESA's recent push to land things on comets and asteroids makes me pause and wonder if they have in the last decade or so calculated the orbit of an object that concerns them.
1 comments

Finding near earth objects is done in the open: http://neo.jpl.nasa.gov/ca/

The succession of missions (going back 20 years now) is here: http://neo.jpl.nasa.gov/faq/#spacecraft