was removed from the risk table on 24 February 2006 when it was serendipitously rediscovered. (with an observation arc of 7 days) showed a 1 in 42000 chance of impacting Earth on 22 January 2029. It was removed from the Sentry Risk Table on 23 November 2006. was rated level 1 on December 22, 2006, when it had an observation arc of 25 days, but was removed from the Sentry Risk Table on February 7, 2007. 2007 was rated level 1 for one week ending 19 February 2007. The asteroid was estimated to be roughly in diameter and had a virtual impactor listing a 1 in 625,000 chance of impact on 14 March 2012. It was removed from the risk table on February 22. was rated level 1 on 3 July 2007 with an observation arc of 19 days. The asteroid was estimated to be in diameter and there was a 1 in 556,000 chance of impact on 11 July 2082. It was removed from the risk table on 15 July 2007. 2008 was rated level 1 until 14 February 2008. It was removed from the risk table on 19 December 2009. 2009 was rated level 1 after its discovery in May 2009 (with a 15-day observation arc), and downgraded to 0 by 11 June 2009. It was removed 17 June 2009. was rated level 1 after its discovery on 17 November 2009, and downgraded by the end of November. It was not removed from the risk table until 26 June 2013. was rated level 1 on 28 December 2009 (with an observation arc of 10 days). It was downgraded to 0 by the end of December. 2010 was rated level 1 in February 2010, and downgraded to 0 on 9 April 2010. The chance of an actual collision with an asteroid like 2005 YU55 (~400 meters in diameter) is about 1 percent in the next thousand years. was rated level 1 on 18 May 2010 with an observation arc of 7 days. There was roughly an estimated 1 in 77,000 chance of impact on 26 June 2058. It was removed on 23 May 2010. was rated level 1 in December 2010, and downgraded to 0 on 2 January 2011. 2011 was rated level 1 on 13 February 2011 with an observation arc of 13.8 days. There was a 1 in 24,000 chance of impact on 18 January 2086. It