Cite
 

Meaning of Aten asteroid

A'ten as"teroid

Pronunciation: [key]
— Astron. Astron.
  1. one of a small group of asteroids whose orbits cross that of the earth and whose semimajor axes are smaller than that of the earth. Cf. Apollo asteroid.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.