WordReference Random House Unabridged Dictionary of American English © 2026
A′ten as′teroid, [Astron.]
  1. Astronomyone 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.

'Aten asteroid' also found in these entries (note: many are not synonyms or translations):
Apollo asteroid

Forum discussions with the word(s) "Aten asteroid" in the title:


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