Aten asteroid

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Aten asteroid

[′ä‚ten ′as·tə‚rȯid]
(astronomy)
An asteroid whose period is less than that of the earth.
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References in periodicals archive ?
This newest asteroid is up to 50 percent more likely to hit Earth than other types of asteroids, said Helin, who pioneered the study of Aten asteroids in the 1970s.
Dozens of Apollo and Aten asteroids orbit the Sun, and 1986 TO travels in a rather normal elliptic orbit.