Final answer:
Centaurs will never be classified as Near Earth Asteroids because they are distant objects with orbits that generally lie beyond Neptune, such as Pholus, which has an orbit that takes it 33 AU from the Sun.
Step-by-step explanation:
The category of Near Earth Asteroids (NEAs) encompasses several groups, including the Apollo, Amor, and Aten asteroid families. These NEAs all share the characteristic of having orbits that bring them close to Earth's orbit. The Apollo asteroids are characterized by orbits that cross Earth's orbit, while Amor asteroids have orbits that come close to, but do not cross, Earth's orbit, and Aten asteroids have orbits that are smaller in size than Earth's orbit but can also cross it.
On the other hand, Centaurs are a different category of celestial objects that share characteristics with both asteroids and comets. They are typically located far beyond the main asteroid belt, some even beyond the orbit of Neptune. Named after the mythological creatures that were half human, half horse, Centaurs are not considered NEAs. In particular, the object known as Pholus is classified as a Centaur due to its orbit taking it 33 AU (Astronomical Units) from the Sun, which places it well outside the region where Near Earth Asteroids are found.