MIT astronomers discovered 2002 NT7 earlier this month. Initial observations led to estimates of a one-in-250,000 chance of impact in 2019 and another remote chance of collision on February 1, 2060. Since then, however, additional data have provided a clearer picture of the asteroids orbit and reduced uncertainties about its future position. As a result, scientists at NASAs Jet Propulsion Laboratory have crossed the 2019 crash off their "impact risk" list.
The new work does not render the 2060 collision scenario totally obsolete thoughnot yet anyway. "While we cannot yet completely rule out an impact possibility on February 1, 2060, " the lab states, "it seems very likely that this possibility will be soon ruled out as well as additional positional observations are processed."