Not close but not far away either, at 1/4 mile long an impact would have been devastating
An asteroid on the list of potentially dangerous space rocks that could endanger the Earth was caught on camera as it zoomed past our planet this month, and found to be larger than astronomers originally thought.
The asteroid buzzed the Earth on April 19 and came within 1.5 million miles (2.4 million km) of the planet. That's about six times the distance between Earth and the moon.
The Arecibo data for 2005 YU55 refined the orbit so that no impact threat exists for the next hundred years but its still one to keep an eye on. Orbit diagram below:
  