Closest approaches to Earth achieved in the next 1000 years for all the observed PIs and an equal number of randomly selected UOs. 108 PIs and 884 UOs are not plotted because their closest approaches exceeded the x-axis limits of 2 au. Every object that reach Earth within 0.01 au and 99.9% of objects within 0.05 au are identified by HOI as PIs.
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