2012 KP24
Overview. It was discovered on 23 May 2012 by the Mount Lemmon Survey at an apparent magnitude of 20.8 using a reflecting telescope. On 28 May 2012 at 15:20 UT, the asteroid passed from the center-point of Earth. The asteroid is estimated to be in diameter. It was removed from the Sentry Risk Table on 8 August 2013 after Sentry updated to planetary ephemeris (DE431). It has an uncertainty parameter of 6. While listed on the Sentry Risk Table, virtual clones of the asteroid that fit the uncertainty region in the known trajectory showed a 1 in  9,091,000 chance that the asteroid could impact Earth on 2032 May 28. With a Palermo Technical Scale of −7.22, the odds of impact by in 2032 were about 16 million times less than the background hazard level of Earth impacts which is defined as the average risk posed by objects of the same size or larger over the years until the date of the potential impact.