Aten group

Aten group

(ah -ten) A group of near-Earth asteroids that have semimajor axes less than 1 AU and thus periods of less than one year. The group is named after (2062) Aten, discovered in 1976 (see Table 3, backmatter). Over a dozen Aten asteroids are now known, the largest being (2100) Ra-Shalom and 1986 T0 (asteroid number 3753).
Collins Dictionary of Astronomy © Market House Books Ltd, 2006