(721708) 2004 BX159

Asteroid yes (721708) 2004 BX 159 #D6D6D6 20 January 2004(discovery: first observation only) Paranal Obs. Paranal Obs. (721708) 2004 BX 159 main-belt(middle) 4 September 2017 (JD 2458000.5) 0 19.97 yr (7,293 days) 14 July 1997 2.8997 AU 2.1632 AU 2.5315 AU 0.1455 4.03 yr (1,471 days) 355.95° 0.2447 ms / day 4.0931° 159.75° 153.29° 1.2 km (estimate)1.8 km (est. at 0.10) 16.9 (721708) 2004 BX 159 is an asteroid from the central region of the asteroid belt, approximately 1.2 kilometers in diameter. It was first observed at Paranal Observatory in the Atacama desert of Chile on 20 January 2004. 2004 BX 159 missed the virtual impactor date of 29 August 2009. The asteroid was removed from the Sentry Risk Table in April 2014 as a result of precovery images establishing it is a harmless main belt asteroid. Description 2004 BX 159 orbits the Sun in the central main-belt at a distance of 2.2–2.9 AU once every 4.03 years (1,471 days). Its orbit has an eccentricity of 0.15 and an inclination of 4° with respect to the ecliptic. After discovery, it was thought to be a Mars-crossing asteroid because of its poorly known orbit, and was listed on the Sentry Risk Table as a possible impactor. With an observation arc of 3 days and only 8 observations, perihelion was determined to be 1.5 3 astronomical units (AU). Precovery observations in archival data of the Canada-France-Hawaii Telescope on Mauna Kea were identified in early 2014, resulting in a dramatic improvement of the orbital accuracy, sufficient to recognize the object as a regular main belt asteroid, not posing any danger to Earth. The body was subsequently linked by the Minor Planet Center with additional observations reported since 1997. It has now a well-established orbit, observed over decades, with the lowest possible uncertainty of 0. It is even known that 2004 BX 159 passed 0.0036 AU km mi on from asteroid 3 Juno on 18 September 1961. See also 2010 GZ 60 References 2017-07-02 last obs. JPL Small-Body Database Browser: (2004 BX159) http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3250627;cad=1 Jet Propulsion Laboratory 3 August 2017 2004 BX159 Minor Planet Center http://www.minorplanetcenter.net/db_search/show_object?object_id=2004+BX159 3 August 2017 18 February 2007 2004 BX159 Earth Impact Risk Summary NASA Near Earth Object Program http://neo.jpl.nasa.gov/risk/2004bx159.html https://web.archive.org/web/20070218092947/http://neo.jpl.nasa.gov/risk/2004bx159.html dead 18 February 2007 1 April 2014 computed on 2011-09-14 Asteroid 2004 BX159 Impact Risk Wayback Machine: NASA/JPL Near-Earth Object Program Office http://neo.jpl.nasa.gov/risk/2004bx159.html dead https://web.archive.org/web/20140401144737/http://neo.jpl.nasa.gov/risk/2004bx159.html 1 April 2014 Asteroid Size Estimator CNEOS/JPL https://cneos.jpl.nasa.gov/tools/ast_size_est.html 2 August 2017 JPL solution 3 (solution date 2011-Sep-14) http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2004BX159 (2004 BX159) 8 March 2019 https://archive.today/20121213172810/http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2004BX159 13 December 2012 dead Removed Objects http://neo.jpl.nasa.gov/risk/removed.html Near Earth Object Program 2 March 2018 https://web.archive.org/web/20140403151020/http://neo.jpl.nasa.gov/risk/removed.html 3 April 2014 dead External links 2004 BX159 – hohmanntransfer 2004BX159 2004BX159 3250627 September 2019 721708 (721708) 2004 BX 159 Category:Background asteroids Category:Near-Earth objects removed from the Sentry Risk Table 20040120