 It poses no threat, but they say it's the closest flyby on record of an asteroid that size. On Saturday, another huge asteroid will fly past our planet. This recently discovered asteroid is a lot smaller at about 800 feet wide, but will come a lot closer at around 180,000 miles from Earth. Scientists say there's no risk of it hitting us, but at the same time noted that if it did, it would cause considerable damage. I'm Tammy Trujillo.