2007 WD5 is a 50 m (160 ft) Apollo-class near-Earth object and a Mars-crosser asteroid discovered on 20 November 2007 by Andrea Boattini of the Catalina Sky Survey. Early observations of 2007 WD5 caused excitement amongst the scientific community when it was estimated as having as high as a 1 in 25 chance of colliding with Mars on 30 January 2008. However, by 9 January 2008 additional observations allowed NASA's Near Earth Object Program (NEOP) to reduce the uncertainty region resulting in only a 1-in-10,000 chance of impact. 2007 WD5 most likely passed Mars at a distance of 6.5 Mars radii. Due to this relatively small distance and the uncertainty level of the prior observations, the gravitational effects of Mars on its trajectory are unknown and, according to Steven Chesley of NASA's Jet Propulsion Laboratory Near Earth Object program, 2007 WD5 is currently considered "lost". The best fit trajectory had the asteroid passing within 21,000 km of Mars and only 16,000 km from the moon Deimos.
In the search for various types of near-Earth object, such as quasi-satellites and Earth-crosser asteroids, objects that may correspond to some lost sightings include 2006 RH120 or 3753 Cruithne, among others.
In 2007, the object 2007 RR9 was found to be the asteroid 6344 P-L, lost since 1960. It is a potentially hazardous object and probably a dormant comet, although it was not visibly outgassing at that time.
Read more about this topic: Lost Asteroid
Other articles related to "21st century, 1990s, 2010s, 2020s, 2030s, 2040s, 2050s, 2060s, 2070s, 2080s, 2090s, 4th, 3rd, 2nd, 1st":
... Also in 2002, the Road map for peace calling for the resolution of the Israeli-Palestinian conflict was proposed by a "quartet" the United States, European Union, Russia, and United Nations ... U.S ...
... In 2003, Landry's bought Muer Seafood Restaurants, a small chain of seafood restaurants ... In 2004 the company opened the Galveston Island Convention Center at the San Luis Resort, which was developed in a partnership with the City of Galveston, Texas ...
... Manuscript holdings include materials related to local history, such as Active Fire Society in Newburyport Belleville Improvement Society First Religious Society in Newburyport General Charitable Society Monday Evening Club Newburyport Choral Union Newburyport Female Charitable Society Newburyport Lyceum Newburyport Union Singing Society Oak Hill Cemetery and Second Presbyterian Church. ...