Let's figure it all out. How High Is Low Earth Orbit? ... Such an object with less than 0.25 eccentricity (a roughly circular orbit), therefore, would have an average altitude of 2,042 km ...

Zero equates to a perfectly circular orbit. In our solar system, Earth has an eccentricity of 0.02, while Pluto’s highly oval-shape orbit around the sun is considered 0.25.

For three to five days, the crew of four will orbit Earth's polar regions. ... The Falcon 9 flew right into a 90-degree circular orbit. In the 64 years of humans launching to space, ...