Meteorite from Ontario fireball described as 'Rosetta stone'. Public urged to help find it
This is not your run-of-the-mill meteor fall
Canadian and NASA researchers believe one or more fragments of a rare and valuable meteorite may have landed near St. Thomas, Ont., after a fireball streaked across the sky in southern Ontario Tuesday night.
snip
Not only was there good data on the space rock's orbit, but that orbit itself was special. It turns out the rock has spent most of its recent past circling closer to the sun than the Earth, having left its original orbit in the asteroid belt between Mars and Jupiter long ago.
Bill Cooke, head of NASA's meteoroid environment office, said only one other meteorite known to have come from that kind of orbit has ever been recorded.
"This is not your run-of-the-mill meteor fall," he said at the news conference. "This is a very unusual orbit. We're really interested in knowing what type of object was in this
We won't know that until we find a piece of it."
http://www.cbc.ca/news/technology/meteorite-from-ontario-fireball-described-as-rosetta-stone-1.2581751