XF11 ((35396) 1997 XF₁₁, also written (35396) 1997 XF11) is a near-Earth and Mars-crosser asteroid which, shortly after its discovery in December 1997, was predicted to make an exceptionally close approach to Earth in October 2028. Additional prediscovery observations of the asteroid were quickly found and the present orbit will take the asteroid past the Earth on October 26, 2028 at the relatively safe distance of 930,000 kilometers (580,000 miles).