|Discovered by||Kitt Peak (691)|
|Discovery date||16 March 2009|
|MPC designation||2009 FD|
|Minor planet category||Apollo NEO,|
|Aphelion||1.7360 AU (Q)|
|Perihelion||0.58962 AU (q)|
|Semi-major axis||1.1628 AU (a)|
|Orbital period||1.25 yr|
|Mean anomaly||38.849° (M)|
|Longitude of ascending node||9.5578°|
|Argument of perihelion||281.22°|
|Dimensions||~130 meters (430 ft)|
|Mass||2.7×109 kg (assumed)|
|Rotation period||4.0 h|
|Absolute magnitude (H)||22.1|
2009 FD is an Apollo asteroid (a class of near-Earth asteroid) with an orbit that places it at risk of a possible future collision with Earth. It has the 4th highest impact threat on the Palermo Technical Impact Hazard Scale. It was discovered on 16 March 2009. 2009 FD made a close pass to Earth on 27 March 2009 at a distance of 0.004172 AU (624,100 km; 387,800 mi) and another on 24 October 2010 at 0.0702 AU. The next good chance to recover 2009 FD and refine its orbit will be the close approach of April 2014 when it will pass 0.1 AU from Earth.
NASA's Near Earth Program estimates its size to be 130 metres in diameter with a mass of around 2,800,000 tonnes. NASA predicts 2009 FD will make two close approaches in the late 22nd century, with the approach of March 2185 currently having a 1 in 556 chance of impacting Earth. Such an impact would cause severe devastation to a large region, or tsunamis of significant size. Due to 2009 FD's size, and its interactions with Mars and Venus, which increase its orbital uncertainty over time, it is rated −1.80 on the Palermo Scale, placing it relatively high on the Sentry Risk Table.
- "MPEC 2009-F09 : 2009 FD". IAU Minor Planet Center. 2009-03-17. Retrieved 2013-01-09. (K09F00D)
- "JPL Small-Body Database Browser: (2009 FD)". Jet Propulsion Laboratory. 2010-12-07 last obs (arc=1.78 yr). Retrieved 2013-08-16.
- 2009 FD Impact Risk
- JPL Small-Body Database Browser: (2009 FD). Retrieved 2012-06-16.
- Sentry Risk Table
- "JPL Close-Approach Data: (2009 FD)". 2010-12-07 last obs (arc=1.78 years). Retrieved 2012-01-09.
- Near Earth Asteroid 2009 FD - whilst you were sleeping! (ice in space)
- How a Near-Earth Object Impact Might Affect Society, 9 January 2003, Clark R. Chapman, SwRI, Boulder CO USA
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