(332446) 2008 AF4

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(332446) 2008 AF4
Discovery
Discovery date January 10, 2008
Designations
Minor planet category Apollo
Orbital characteristics[1]
Epoch May 14, 2008 (JD 2454600.5)
Aphelion 1.950439435123868±2.6748e-05 AU
Perihelion 0.8147012086707814±3.5283e-06 AU
1.382570321897325±1.896e-05 AU
Eccentricity 0.4107343432970895±1.0617e-05
593.7850679079642±0.012214 d (1.63±3.344e-05a)
11.66 km/s
106.4875997727181±0.0023546°
Inclination 8.920043606536419±0.00020299°
109.4303940330929±7.2627e-05°
293.3361862619637±0.00011821°
Physical characteristics
Dimensions 390 m
Mass 8.3x1010 kg
19.677[1]

(332446) 2008 AF4 is an asteroid which was listed on the Sentry Risk Table in January 2008 with a Torino Scale rating of 1.[2] The asteroid showed a 1 in 71,000 chance of impact on 9 January 2089.[2] It was briefly downgraded to Torino Scale 0 in February 2008, but still showed a cumulative 1 in 53,000 chance of an impact.[3] In March it was back at Torino Scale 1 with a 1 in 28,000 chance of impact on 9 January 2089.[4] By mid April 2008, it was back to Torino Scale 0. It was removed from the Sentry Risk Table on 19 December 2009.[5]

2183 passage[edit]

2008 AF4 may pass as close as 0.002 AU (300,000 km; 190,000 mi) from Earth on 2183-Jan-12.[6] But the nominal solution shows the asteroid passing 0.009 AU (1,300,000 km; 840,000 mi) from Earth.[6]

References[edit]

  1. ^ a b "JPL Small-Body Database Browser: 2008 AF4". Retrieved 2008-02-05. 
  2. ^ a b "WayBack Machine archive from 1 January 2008". Wayback Machine. 2008-01-15. Archived from the original on 2008-01-15. Retrieved 2013-09-07. 
  3. ^ "WayBack Machine archive from 14 February 2008". Wayback Machine. 2008-02-14. Archived from the original on 2008-02-14. Retrieved 2013-09-07. 
  4. ^ "WayBack Machine archive from 16 March 2008". Wayback Machine. 2008-03-16. Archived from the original on 2008-03-16. Retrieved 2013-09-07. 
  5. ^ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 2011-11-06. 
  6. ^ a b "JPL Close-Approach Data: 332446 (2008 AF4)" (last observation: 2013-03-19; arc: 10.8 years). Retrieved 2013-09-07.