6 degrees, which allows the ground track to pass over populated areas of the Northern Hemisphere. Below 160 kilometers, atmospheric drag becomes so significant that a spacecraft would require prohibitively large amounts of fuel to maintain orbit, effectively making it a suborbital trajectory rather than a sustained orbit.
Understanding Stable Low Earth Orbit Path Requirements
Low Earth orbit represents the closest region of space to Earth's surface, serving as the operational domain for the International Space Station, the Hubble Space Telescope, and thousands of active satellites. Atmospheric Density and Orbital Decay Even within the defined upper range, trace atmospheric molecules exist, creating a minuscule drag force that gradually slows a satellite's momentum.
8 kilometers per second (about 17,500 miles per hour) at the altitudes most commonly used for human spaceflight. Furthermore, the relatively accessible orbit requires less energy to reach, reducing launch costs and enabling the deployment of large satellite constellations for global internet coverage.
Achieving Stable Low Earth Orbit Path Defined Altitude Range
The International Space Station, for example, regularly performs reboost maneuvers using docked spacecraft to counteract this decay and maintain its altitude between 330 and 435 kilometers. The Defined Altitude Range Engineers and space agencies classify low Earth orbit by a precise altitude boundary that balances gravitational pull against orbital velocity.
More About What is considered low earth orbit
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More perspective on What is considered low earth orbit can make the topic easier to follow by connecting earlier points with a few simple takeaways.
