The eccentricity of asteroids varies greatly. There is no single answer to the question of "what is the eccentricity of asteroids?" because it's a property that differs for each asteroid.

Here's why:

* Eccentricity describes the shape of an orbit. It's a measure of how much an orbit deviates from a perfect circle. A perfectly circular orbit has an eccentricity of 0, while a very elongated orbit has an eccentricity close to 1.

* Asteroids have diverse orbits. Some asteroids have nearly circular orbits, while others have very elliptical orbits. This is due to their formation and interactions with planets and other objects in the solar system.

Here are some important points about asteroid eccentricity:

* Average: The average eccentricity of asteroids in the asteroid belt is around 0.15.

* Range: Eccentricity can range from near 0 to nearly 1.

* Types of orbits:

* Near-Earth asteroids (NEAs): Often have higher eccentricities than main-belt asteroids, due to gravitational interactions with the inner planets.

* Trojan asteroids: These share an orbit with Jupiter and have relatively low eccentricities.

* Orbital evolution: Eccentricity of an asteroid's orbit can change over time due to gravitational perturbations from other bodies.

In conclusion: There's no single answer to the question about asteroid eccentricity. It's a crucial factor in understanding an asteroid's orbit and how it might potentially interact with other objects in the solar system, including Earth.