2004 FU162

Closest known Earth approach until 2008 February 2018 yes 2004 FU 162 #FFC2E0 2004 FU 162 AtenNEO 5 April 2004 (JD 2453100.5) 9 44 minutesarc(only 4 observations) 1.1511 AU 0.5026 AU 0.8269 AU 0.3922 0.75 yr (275 days) 262.67° 1.3109 ms / day 4.1647° 191.25° 139.78° 0.0001 AU 4–12 meters (estimated) 28.7 2004 FU 162 is an Aten near-Earth asteroid less than 20 meters in diameter crudely estimated to have passed roughly 6500 km above the surface of Earthsurface on 31 March 2004. It was only observed for 44 minutes on 31 March 2004,arc by the Lincoln Near-Earth Asteroid Research (LINEAR) team at Lincoln Laboratory's Experimental Test Site in Socorro, New Mexico, and remains a lost asteroid. The estimated 4 to 6 meter sized body made one of the closest known approaches to Earth. Description On 31 March 2004, around 15:35 UTC, the asteroid is crudely estimated to have passed within approximately 1 Earth radius () or 6,400 kilometers of the surface of the Earth (or 2.02  from Earth's center). But due to the very short observation arc, the uncertainty in the close approach distance is a large ±15000 km. By comparison, geostationary satellites orbit at 5.6 and GPS satellites orbit at 3.17 from the center of the Earth. 2008 this was the third or fourth closest approach. The first observation of 2004 FU 162 was not announced until 22 August 2004. It was only observed four times in the space of 44 minutes and could not be followed up. Nevertheless, "the orbit is quite determinate and, given the exceptional nature of this close approach, the object is now receiving a designation". No precovery images have been found. 2004 FU 162 is estimated to be approximately 6 meters in diameter.April 2017 This means that it would burn up from atmospheric friction before striking the ground in the case of an Earth impact. On 26 March 2010, it may have come within 0.0825 AU (12.3 million km) of Earth, but with an uncertainty parameter of 9, the orbit is poorly determined. Another, larger near-Earth asteroid, 2004 FH passed just two weeks prior to 2004 FU 162. A closer non-impacting approach to Earth was not known until 2008 TS 26 on 9 October 2008. See also Notes arc Observation arc: (31.30799 – 31.27744) * 24 hours * 60 minutes 43.99 minutes surface The asteroid passed about 12913±15000 km from the center of Earth and Earth has a radius of 6371 km. References last observation: 2004-03-31; arc: 1 day; uncertainty: 9 JPL Small-Body Database Browser: (2004 FU162) Jet Propulsion Laboratory https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=2004FU162&view=OPC https://web.archive.org/web/20201128181049/http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2004FU162;cad=1 2020-11-28 live 28 April 2017 2004 FU162 Minor Planet Center http://www.minorplanetcenter.net/db_search/show_object?object_id=2004+FU162 28 April 2017 22 August 2004 Closest by far hohmanntransfer http://www.hohmanntransfer.com/mn/0408/22.htm 2004-08-25 5 November 2016 https://web.archive.org/web/20161105153448/http://www.hohmanntransfer.com/mn/0408/22.htm dead Yeomans Donald K. http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2004FU162 Horizon Online Ephemeris System California Institute of Technology, Jet Propulsion Laboratory 2008-01-25 External links MPEC 2004-Q22 (2004 Aug. 22) 3249978 # Category:Minor planet object articles (unnumbered) 20040331 20040331 Category:Lost minor planets