(89959) 2002 NT7

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(89959) 2002 NT7 (also written (89959) 2002 NT7) is a near-Earth object (NEO) with a diameter of 1.2 miles[1] (2 kilometers) that became the first object observed by NASA's NEO program to be assigned a positive rating on the Palermo Technical Impact Hazard Scale, for a potential impact on February 1, 2019. Despite inflammatory press reports, the object had a "low probability" of impact, approximately one in a million.[1]

Further observations of the object quickly re-rated the threat lower. As of July 25, 2002, the hazard rating on the Palermo scale had been lowered to -0.25. However, the discovery of an object with an initial Palermo hazard rating of 0.06[2] was a historical event for the NEO observation program.

2002 NT7 was removed from the Sentry Risk Table on August 1, 2002.[3]

It is now known that on January 13, 2019 the asteroid will safely pass 0.4078 AU (61,010,000 km; 37,910,000 mi) from the Earth.[4]

On January 30, 2020 the asteroid will pass 0.02718 AU (4,066,000 km; 2,527,000 mi) from 2 Pallas.[5]


  1. ^ a b Asteroid 2002 NT7 Under Watch, But Probably Not Coming Our Way (25 July 2002)
  2. ^ "Space rock 'on collision course'". BBC News. 24 July 2002. Retrieved 2007-12-28. 
  3. ^ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 2011-05-06. 
  4. ^ "JPL Close-Approach Data: 89959 (2002 NT7)". 2011-09-12 last obs (arc=57 years). Retrieved 2011-11-04. 
  5. ^ "NEODyS-2 Close Approaches for (89959) 2002NT7". Near Earth Objects - Dynamic Site. Retrieved 2011-11-05. 

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