Saturday, October 17, 2009
The orbit can be seen on the right - it's a fairly close one and quite comparable to that of Mars but just a bit lopsided. An asteroid of this size could one day be an interesting candidate to be moved into Earth orbit in order to be mined, because at a mere 7 metres in diameter it would pose no danger to the planet even if a mistake were to be made, while 7 metres still makes for a fair amount of material - 179 cubic metres of material. With a density of 2 grams per cubic centimetre this would make for a total mass of 360,000 tons.
As for the explosive force of this asteroid if it were to hit - it would result in a 4 kiloton explosion in the atmosphere, which really isn't much at all. Little Boy (the bomb dropped on Hiroshima) had a blast yield of 13-18 kilotons, and that was dropped over the centre of a city as opposed to way up in the atmosphere likely in the middle of nowhere, and also without radiation as well.