Radar investigation of asteroids

Resource Information

The work Radar investigation of asteroids represents a distinct intellectual or artistic creation found in Indiana State Library. This resource is a combination of several types including: Work, Language Material, Books.

Label

Radar investigation of asteroids

Statement of responsibility

Steven J. Ostro, principal investigator

Creator

• Ostro, Steven J

Contributor

• United States, National Aeronautics and Space Administration
• Cornell University, Center for Radiophysics and Space Research

Subject

• Radar cross sections
• Radar in astronomy
• Asteroids -- Observations

Genre

• trueObservations

Language

eng

Summary

"For 80 Sappho, 356 Liguria, 694 Ekard, and 2340 Hathor, data were taken simultaneously in the same sense of circular polarization as transmitted (SC) as well as in the opposite (OC) sense. Graphs show the average OC and SC radar echo power spectra soothed to a resolution of EFB Hz and plotted against Doppler frequency. Radar observations of the peculiar object 2201 Oljato reveal an unusual set of echo power spectra. The albedo and polarization ratio remain fairly constant but the bandwidths range from approximately 0.8 Hz to 1.4 Hz and the spectral shapes vary dramatically. Echo characteristics within any one date's approximately 2.5-hr observation period do not fluctuate very much. Laboratory measurements of the radar frequency electrical properties of particulate metal-plus-silicate mixtures can be combined with radar albedo estimates to constrain the bulk density and metal weight, fraction in a hypothetical asteroid regolith having the same particle size distribution as lab samples"--NTIS abstract

Member of

• NASA contractor report, NASA CR-175350

Cataloging source

COD

Funding information

NASA grant

Government publication

federal national government publication

Illustrations

illustrations

Index

no index present

Literary form

non fiction

Nature of contents

technical reports

Period covered

July 1, 1983 - December 31, 1983

Series statement

NASA-CR

Series volume

175350

Type of report

Semi-annual status report;