2008 AF4

2008 AF4
Discovery
Discovery date January 10, 2008
Designations
Minor planet
category		 Apollo
Epoch May 14, 2008 (JD 2454600.5)
Aphelion 1.950439435123868±2.6748e-05 AU
Perihelion 0.8147012086707814±3.5283e-06 AU
Semi-major axis 1.382570321897325±1.896e-05 AU
Eccentricity 0.4107343432970895±1.0617e-05
Orbital period 593.7850679079642±0.012214 d (1.63±3.344e-05a)
Average orbital speed 11.66 km/s
Mean anomaly 106.4875997727181±0.0023546°
Inclination 8.920043606536419±0.00020299°
Longitude of ascending node 109.4303940330929±7.2627e-05°
Argument of perihelion 293.3361862619637±0.00011821°
Physical characteristics
Dimensions 390 m
Mass 8.3x1010 kg
Absolute magnitude (H) 19.677[1]

2008 AF4 is an asteroid which is listed on the Near Earth Object Risk List that at one time had a rating on the Torino Scale of Level 1. By May 2008, it was rated as having a 1 in 909,000 chance of impacting Earth in 2096, 2099 or 2100, downgrading its risk to Level 0. It was removed from the Sentry Risk Table on 2009-Dec-19.[2]

References

  1. ^ a b "JPL Small-Body Database Browser: 2008 AF4". http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2008+AF4&orb=1. Retrieved 2008-02-05. 
  2. ^ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. http://neo.jpl.nasa.gov/risk/removed.html. Retrieved 2011-11-06.