Michael Khan did the math and back-tracked 2010 AL30′s path through the solar system and believes that the object's life began with the launch of the ESA Venus Express mission in 2005.
"Probably 2010 AL30 is of natural origin. However, the possibility that it is man-made cannot be completely excluded," Khan said in an article on his blog. "If so, it might be the upper stage of a rocket used in an earlier planetary mission, possibly to Venus. The current orbit would have been acquired through a Venus swingby and other orbital perturbations."
This idea led him to speculate that there might be an outside chance that the NEO could be the Fregat upper stage of the Soyuz launch vehicle that blasted Venus Express into space on Nov. 9, 2005. The spacecraft arrived at Venus on April 11, 2006.
After an in-depth analysis of where the used rocket could be located at this time in space, Khan sees "coincidences galore" in his calculations and the observed orbital characteristics of the object.
This is certainly a very interesting (and pretty cool) factor to consider as there are other examples of spent rockets floating around in space that have been observed from Earth.