NASA have published data of a very close-approach which occurred on Feb-25 at 19:49Z (note that the asteroid was not discovered until the following day). The asteroid in question is 2016 DY30 (the 774th <0.5 AU asteroid to be discovered since March 01 2016). Its nominal (expected) close-approach distance was just 4933.546 miles from Earth's surface.  Although small (estimated to be 2-5m in