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Why aren all the JPL spacecraft on the body list?

April 26, 2017body jpl list spacecraft

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Why aren all the JPL spacecraft on the body list?

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Not all JPL spacecraft have ephemeris files that can be plugged in to the simulator. Efforts continue to do this. Also, some spacecraft orbit close to their parent body and aren’t fully appropriate for the simulator (their ephemerides are very large, for example).