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Science 22 September 2000:
Vol. 289. no. 5487, p. 2023
DOI: 10.1126/science.289.5487.2023b
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News of the Week

PLANETARY SCIENCE
Twins for the Themis Asteroid Family

Richard A. Kerr

A high-tech telescopic search has revealed that the asteroid Antiope is actually two bodies of similar size circling each other. It's not the first asteroid found to be a pair, but the uniquely twinned Antiope presents a severe problem: How could the continual banging about among asteroids create bodies of similar size in orbit about each other?

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Science. ISSN 0036-8075 (print), 1095-9203 (online)