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2011 MD was observed by the Spitzer Space Telescope in February 2014 and estimated to be 6 meters (20 ft) in diameter. [4] The asteroid is a porous rubble pile with a density similar to water. [4] On 19 June 2014, NASA reported that asteroid 2011 MD was a prime candidate for capture by the Asteroid Redirect Mission (ARM) in the early 2020s. [10]
(367789) 2011 AG 5, provisional designation 2011 AG 5, is a sub-kilometer asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group. [1] It has a diameter of about 140 meters (460 ft). [4] It was removed from the Sentry Risk Table on 21 December 2012 and as such it now has a rating of 0 on the Torino Scale ...
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
(436724) 2011 UW 158, provisionally known as 2011 UW 158, is a stony, walnut-shaped asteroid and fast rotator, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 300 meters in diameter.
More than one asteroid per year may be listed if its geocentric distance [note 1] is within a tenth of the lunar distance, or 0.10 LD. For comparison, since a satellite in a geostationary orbit has an altitude of about 36,000 km (22,000 mi), then its geocentric distance is 0.11 LD (approximately three times the width of the Earth).
Business and economy Greek economic crisis: The Parliament of Greece begins debate on unpopular austerity measures designed to avert the threat of bankruptcy through a 78-billion- euro rescue package. (Reuters via Yahoo News) (Bloomberg) The governor of the central bank of Greece, George Provopoulos, criticizes the government's latest austerity measures, saying it does not emphasize cutting ...
NASA: 253 Mathilde: Flyby Successful 433 Eros: Orbiter Mostly successful Closest approach to Mathilde was 1,212 kilometres (753 mi) at 12:56 UTC on 27 June 1997. Three days before arrival at Eros the orbiter aborted a burn resulting in failure to enter orbit, instead flew past at 3,827 kilometres (2,378 mi) at 18:41:23 on 23 December 1998.
14 April 2011 — Preliminary release of data covering 57% of the sky as seen by WISE. [39] 27 July 2011 — First Earth trojan asteroid discovered from WISE data. [6] [7] 23 August 2011 — WISE confirms the existence of a new class of brown dwarf, the Y dwarf. Some of these stars appear to have temperatures less than 300 K, close to room ...