Neptune moves in an elliptical orbit with the sun at one of the foci. The length of half of the major axis is kilometers, and the eccentricity is 0.0086. Find the perihelion distance of Neptune from the sun. Round your answer to the nearest kilometers.

Given that,

Eccentricity = 0.0086

Suppose, The length of half of the major axis is

We need to calculate the distance from the center to the foci

Using formula of eccentricity

Where, e = eccentricity

a = major axis

c = the distance from the center to the foci

Put the value in to the formula

We need to calculate the perihelion distance of Neptune from the sun

Using formula of distance

Put the value into the formula

Hence, The perihelion distance of Neptune from the sun is 991400000 km.

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