Before entering Earth’s atmosphere, a 2026 Perseid dust particle is called a meteoroid.
The Perseid stream consists of solid debris released by Comet Swift–Tuttle. While those particles are traveling through space, they are meteoroids. When one enters Earth’s atmosphere and produces a visible streak of light, the phenomenon is called a meteor. If part of the object survives the passage and reaches the ground, the surviving fragment is a meteorite.
These terms describe different stages of the same general event. Calling every Perseid particle a “meteor” is technically imprecise because meteors are the luminous atmospheric events, not the objects while they remain in space.
A Perseid meteoroid can be very small, often comparable to grains or pebbles, yet it can create a bright streak because it enters the atmosphere at high speed. The visible light comes from the heated, ionized atmospheric trail around the moving particle.