Asteroid 2017 YZ4 to flyby Earth at 0.58 LD on December 28
A newly discovered asteroid designated 2017 YZ4 will flyby Earth at a distance of 0.00150 AU or 0.58 LD (~224 396 km / 139 433 miles) on December 28, 2017. This is the first known asteroid to flyby Earth within 1 lunar distance since November 21 and the 52nd this…