The asteroid, pictured at left with resolution 7.5 meters (25 feet) per pixel, is about 1 kilometer (0.6 miles) in its largest dimension. The new size determination suggests that 2012 LZ1 must be quite dark, reflecting only 2-4% of the light that hits it.
Arecibo Observatory/NASA
2012-07-19
<a rel="nofollow" class="external free" href="http://www.naic.edu/~pradar/news.php#2012">http://www.naic.edu/~pradar/news.php#2012</a><br><a rel="nofollow" class="external free" href="http://www.naic.edu/~pradar/images/2012LZ1.jun19.png">http://www.naic.edu/~pradar/images/2012LZ1.jun19.png</a>