8 kilometers per second (about 17,500 miles per hour) at the altitudes most commonly used for human spaceflight. An inclination of 0 degrees indicates an equatorial orbit, while a 90-degree inclination represents a polar orbit that passes over the North and South Poles.
Low Earth Orbit Altitude Range Explained
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. Orbital Mechanics and Velocity To maintain a stable low Earth orbit, a spacecraft must achieve a specific horizontal velocity that creates a balance between its forward momentum and the downward pull of gravity.
This required velocity is approximately 7. The Role of Inclination In addition to altitude, the orbital inclination—the angle between the orbital plane and Earth’s equator—defines the specific characteristics of a low Earth orbit.
Low Earth Orbit Altitude Range Explained
Most crewed space stations and many observation satellites utilize an inclination of roughly 51. Achieving this speed ensures that as the spacecraft falls toward Earth due to gravity, the planet’s surface curves away at the same rate, resulting in continuous freefall around the planet rather than a direct descent.
More About What is considered low earth orbit
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