What determines the speed of an object orbiting our planet?
OBJECTS CAPTURED BY the Earth’s gravitation typically have elliptical orbits. The mean orbital speed of the object depends only on the Earth’s mass and the semi-major axis (half the longest diameter) of the object’s orbit. However, the orbital speed changes depending on where in the orbit the object is. It will be greatest when closest to Earth and least when furthest from Earth.
Satellites will orbit fastest when they’re close to the Earth