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First asteroid visited by a spacecraft

First asteroid visited by a spacecraft
Who
951 Gaspra
What
First
Where
Not Applicable
When
29 October 1991
On 29 October 1991, the Galileo spacecraft, on its way to Jupiter, made a flyby of the asteroid 951 Gaspra, "brushing" past at a distance of 1,600 km (994 miles) and at a relative speed of about 8 km/s (18,000 mi/h). The probe snapped 57 photographs of the asteroid, documenting around 80% of the surface.