SPACE — A massive asteroid with its own mini moon will be blazing a trail close to Earth this weekend.<br /><br />According to NASA, Asteroid 1999 KW4 is a binary system composed of a nearly mile-wide main body shaped like a walnut or spinning top, orbited by a smaller rock that is a third of a mile across.<br /><br />Each orbit takes 17 and a half hours, according to the Las Cumbres Observatory.<br /><br />NASA reports that the asteroid has been doing flybys several times each century since the 1600s, and will be making another close approach to Earth on May 25.<br /><br />Although classified as 'potentially hazardous' by the Minor Planet Center, the asteroid will be passing near Earth at a safe distance of more than three million miles, or over 13.5 lunar distances.<br /><br />CNET reports that Asteroid 1999 KW4 will be moving fast at 48,123 miles per hour when it flies by, which may make it easier for amateur observers to see.<br /><br />According to NASA, double asteroid's next approach will be closer, but won't be until 2036.
