Perigeo

Perigeo is the point in the orbit of an object (usually a satellite, asteroid, or moon) around the Earth where it is closest to the Earth. It is the opposite of apogee, which is the point in the orbit where the object is farthest from the Earth.

The term "perigee" is often used interchangeably with "perigeo," although "perigee" strictly refers to the closest point to any celestial body. "Perigeo" specifically designates the closest point to Earth.

The distance of an object at perigeo can vary significantly depending on its orbit. A low-Earth orbit satellite will have a relatively close perigeo, while a highly elliptical orbit might have a much greater perigeo distance.

The position of perigeo in an orbit is one of the orbital elements that define the orbit's shape and orientation. Its location can be affected by gravitational perturbations from other celestial bodies.

The date and time when an object reaches perigeo are important considerations for tracking satellites, planning observations, and understanding the effects of tidal forces.