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What is the angular diameter of Mars when it is closest to Earth?

April 26, 2017angular Astronomy closest diameter earth mars Mathematics

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What is the angular diameter of Mars when it is closest to Earth?

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Mars was closest to the Earth on August 28 2003, and at that time had an angular diameter of 25.0 arc seconds. Jupiter will be on opposition this year on August 14, and will have an angular diameter of 48.9 arc seconds. You can calculate the angular diameter in degrees by dividing the actual diameter of Mars in km. by the distance away, also in km. and multiply the result by 57.3. Then multiply by 3600 to get the diameter in arc seconds.