Radar observations of 1999 KW4

Results shown on this page are available in our Science paper:

S. J. Ostro, J. L. Margot, L. A. M. Benner, J. D. Giorgini, D. J. Scheeres, E. G. Fahnestock, S. B. Broschart, J. Bellerose, M. C. Nolan, C. Magri, P. Pravec, P. Scheirich, R. Rose, R. F. Jurgens, E. M. De Jong, S. Suzuki. Radar Imaging of Binary Near-Earth Asteroid (66391) 1999 KW4. Science 314, 1276-1280, 2006.

The data below were acquired on 2001 May 26-29 with our custom-built Portable Fast Sampler and yield images at 15 m resolution.

The sequence of radar images can be inverted to yield a 3D model of each component. The image below shows the primary.

The radar data provide an exquisite characterization of the binary system, with measurement precisions approaching that obtainable from spacecraft.