Question

An asteroid is three times as far from the Sun at aphelion than at perihelion. At perihelion the orbital speed of the asteroid is 25 km/s. What is the orbital speed of the asteroid at aphelion?

Answer 1

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Answer 2

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If a is the semi-major axis and e is the eccentricity of the orbit of the asteroid, Aphelion/perihelion = 3 = (a(1+e))/(a(1-e)