<http://schema.org/alternativeHeadline>
"The asteroid will come back to Earth's neighborhood before too much longer: it completes one lap around the sun every 2.72 years."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/space/stories/newfound-asteroid-buzzes-earth-inside-moons-orbit>