NASA NTRS · 19910069502
Asteroid radar astrometry
Abstract
Measurements of time delay and Doppler frequency are reported for asteroid-radar echoes obtained at Arecibo and Goldstone during 1980-1990. Radar astrometry is presented for 23 near-earth asteroids and three mainbelt asteroids. These measurements, which are orthogonal to optical, angular-position measurements, and typically have a fractional precision between 10 to the -5th and 10 to the -8th, permit significant improvement in estimates of orbits and hence in the accuracy of prediction ephemerides. Estimates are also reported of radar cross-section and circular polarization ratio for all asteroids observed astrometrically during 1980-1990.
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Ostro, S. J., Jurgens, R. F., Rosema, K. D., Winkler, R., Yeomans, D. K., Campbell, D. B., Chandler, J. F., Shapiro, I. I., Hine, A. A., Velez, R.. 1991-10-01. Asteroid radar astrometry. https://ntrs.nasa.gov/citations/19910069502
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