52246 Donaldjohanson, provisional designation 1981 EQ5, is a carbonaceous Erigonian asteroid from the inner regions of the asteroid belt, approximately in diameter. It was discovered on 2 March 1981, by American astronomer Schelte Bus at the Siding Spring Observatory in Australia. The C-type asteroid is a target of the Lucy mission and was aptly named after American paleoanthropologist Donald Johanson.