Assertion: asteroid's number | /r/HasProperty | visited by space probes
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text: A number of objects (433 Eros, 25143 Itokawa, 4 Vesta, 67P/Churyumov-Gerasimenko and more) has been visited by space probes, resulting in a large amount of high-resolution photography and measurements, thus allowing scientists to create very precise models of these objects.