(332446) 2008 AF4

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(332446) 2008 AF4
Discovery [1]
Discovered by LINEAR
Discovery site Lincoln Lab's ETS
Discovery date 10 January 2008
Designations
MPC designation (332446) 2008 AF4
2008 AF4
NEO · Apollo · PHA[1]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 13.78 yr (5,032 days)
Aphelion 1.9506 AU
Perihelion 0.8144 AU
1.3825 AU
Eccentricity 0.4109
1.63 yr (594 days)
8.0690°
0° 36m 22.68s / day
Inclination 8.9193°
109.38°
293.39°
Earth MOID 0.0025 AU · 1 LD
Physical characteristics
Dimensions 390 m
Mass 8.3×1010 kg
19.7[1]

(332446) 2008 AF4 is a sub-kilometer asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, 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 c d "JPL Small-Body Database Browser: 2008 AF4". Retrieved 20 April 2016. 
  2. ^ a b "WayBack Machine archive from 1 January 2008". Wayback Machine. 2008-01-15. Archived from the original on 15 January 2008. Retrieved 2013-09-07. 
  3. ^ "WayBack Machine archive from 14 February 2008". Wayback Machine. 2008-02-14. Archived from the original on 14 February 2008. Retrieved 2013-09-07. 
  4. ^ "WayBack Machine archive from 16 March 2008". Wayback Machine. 2008-03-16. Archived from the original on 16 March 2008. 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. 

External links[edit]