2008 HJ is a small near-Earth asteroid orbiting the Sun. It was discovered by Lincoln Laboratory ETS New Mexico. Observers M. Bezpalko D. Torres R. Kracke G. Spitz J. Kistler. Richard Miles using the Faulkes Telescope South at Siding Spring Observatory Australia determined that the asteroid rotates rapidly. It measures only 12 m by 24 m and is very dense having a mass of about 5000 tonnes.
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