I need to find a planet's nearest and farthest orbital distances from it's stars and the answer must be expressed in million kl  The planet has orbits a distant star with same mass as our sun at an average distance of 122 million km and has an eccentricity of .2

Applications and Investigations in Earth Science (9th Edition)
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I need to find a planet's nearest and farthest orbital distances from it's stars and the answer must be expressed in million kl 

The planet has orbits a distant star with same mass as our sun at an average distance of 122 million km and has an eccentricity of .2 

I understand the question is asking for Aphelion distance and Perihelion distance and I know the equations for both. Would I need to start with converting the average distance (a) to astronomical units? Could you please provide me steps to better understand this question? 

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