What is the minimum size of materials classified as asteroids?

Asteroids are generally classified as small, rocky bodies that orbit the Sun, primarily found in the asteroid belt between Mars and Jupiter. The minimum size criterion for an object to be considered an asteroid is that it must be at least more than 100 meters in diameter. Objects smaller than this size are often termed "meteoroids." The distinction is important in planetary science and astronomy, as it helps categorize celestial bodies based on their sizes and characteristics.

This threshold exists because smaller fragments, which can be numerous, are part of a different classification system focused more on smaller debris in space. Therefore, understanding that asteroids are defined by their size gives context to their behavior and physical properties in our solar system.