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Science 22 June 1990:
Vol. 248. no. 4962, pp. 1523 - 1528
DOI: 10.1126/science.248.4962.1523
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Articles

Radar Image of Asteroid 1989 PB

Steven J. Ostro 1, John F. Chandler 2, Alice A. Hine 3, Keith D. Rosema 1, Irwin I. Shapiro 2, and Donald K. Yeomans 1

1 Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109
2 Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138
3 National Astronomy and Ionosphere Center, Box 995, Arecibo, PR 00613

Radar observations of the near-Earth asteroid 1989 PB, made shortly after its optical discovery, yield a sequence of delay-Doppler images that reveal it to consist of two distinct lobes that appear to be in contact. It seems likely that the two lobes once were separate and that they collided to produce the current "contact-binary" configuration.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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