'Doomsday meteor' to brush past Earth TODAY, NASA's Asteroid Watch warnDaily StarScientist believe a meteor the size of 2012 TT5 could devastate a continent if it crash landed. But now NASA's Asteroid Watch, who "detect, track ...Size of meteor-made craterPhysics Stack ExchangeI am reading "What if" piece http://ift.tt/1Oxo4VC and I am very interested in how can one ever estimate the size