Although Helstrup is still not completely convinced that it was indeed a meteorite that flew past him, the experts are in no doubt.
"It can't be anything else. The shape is typical of meteorites -- a fresh fracture surface on one side, while the other side is rounded," said geologist Hans Amundsen.
He explained that the meteorite had been part of a larger stone that had exploded perhaps 20 kilometres above Helstrup.