Definition
Perigee (Greek geo, Earth) is the lowest point in an orbit around Earth. The Moon at perigee can appear up to 14% larger in angular diameter than at apogee — the so-called supermoon when full phase coincides.
Perigee
Closest point to Earth in a satellite or lunar orbit.
3D illustration
Earth–Moon distance varies; perigee is the minimum geocentric distance.
Use the menu and time controls to explore. Based on Jean Meeus' Astronomical Algorithms.