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What is the longest distance between Mars and Earth during a normal orbit?

April 26, 2017Astronomy distance earth longest mars Mathematics normal

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What is the longest distance between Mars and Earth during a normal orbit?

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I don’t know what a “normal” orbit is. But anyhow, the Mars – Earth distance varies over a synodic period of about 780 days. The minimum gets to be about 55 million km, and the maximum is around 400 million km. For any one particular period, the min & max will be quite a bit different.