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(415029) 2011 UL 21, provisional designation 2011 UL 21, is an Apollo class potentially hazardous asteroid discovered on October 17, 2011, by the Catalina Sky Survey project. [1] The asteroid is estimated to have a diameter of 2.5 kilometres (1.6 mi). It was rated at Torino Scale 1 on October 27, 2011, with an observation arc of 9.6 days. [4]
An asteroid the size of a football stadium will thread the needle between Earth and the moon Saturday morning — the second of two astronomical near misses in three days. Near miss, in this case ...
Free live stream of the space rock is available to watch on Thursday evening ‘Planet killer’ asteroid the size of Mount Everest to skim past Earth tonight Skip to main content
In March 2002, (163132) 2002 CU 11 became the first asteroid with a temporarily positive rating on the Torino Scale, with about a 1 in 9,300 chance of an impact in 2049. [17] Additional observations reduced the estimated risk to zero, and the asteroid was removed from the Sentry Risk Table in April 2002. [18]
This category includes near-Earth asteroids listed as potentially hazardous objects.. The asteroids are sorted numerically by 0-padding either their minor planet number to 6 digits, or, if absent, the year of discovery when using their provisional designation.
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A list of known near-Earth asteroid close approaches less than 1 lunar distance (384,400 km or 0.00257 AU) from Earth in 2011. [note 1] Rows highlighted red indicate objects which were not discovered until after closest approach
Watch live as a Nasa spacecraft returns to Earth with the largest asteroid sample in history on Sunday 24 September. After a seven-year, four-billion-mile journey across space, the ambitious NASA ...
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