Bolide

A bolide is an extremely bright meteor, especially one that explodes in the atmosphere. In astronomy, it refers to a fireball approximately as bright as the full moon, and it is generally considered a synonym of a fireball. In geology a bolide is a very large impactor.

One definition describes a bolide as a fireball reaching an apparent magnitude of −14 or brighter - more than twice as bright as the full moon. Another definition describes a bolide as any generic large crater-forming impacting body whose composition (for example, whether it is a rocky or metallic asteroid, or an icy comet) is unknown.

A superbolide is a bolide which reaches an apparent magnitude of −17 or brighter. Recent examples of superbolides include the Sutter's Mill meteorite and the Chelyabinsk meteor.

Explanation from: https://en.wikipedia.org/wiki/Bolide