De asteroide 1997XF11 zal op 26 oktober 2028 rakelings langs de aarde scheren, dichterbij dan de maan. Zullen door de getijdenkracht geen vloedgolven doen ontstaan? Of misschien knalt die wel tegen de maan! 

http://cfa-www.harvard.edu/cfa/ps/pressinfo/1997XF11.html
Observations made on March 3 and 4 by Peter Shelus with a 30-inch telescope at the McDonald Observatory in western Texas extended the observed arc of 1997 XF11 to 88 days. This time, the orbit computation indicated a miss distance of only 30 thousand miles from the center of the earth; the earth's radius is about 4 thousand miles. The time of encounter would be around 1:30 p.m. Eastern Daylight Time on Thursday, October 26, 2028.
http://cfa-www.harvard.edu/cfa/ps/pressinfo/1997XF11.html