(332446) 2008 AF4

From Wikipedia, the free encyclopedia
Jump to: navigation, search
(332446) 2008 AF4
Discovery
Discovery date 10 January 2008
Designations
Apollo
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 13.78 yr (5032 days)
Aphelion 1.949938669767914 AU (291.70667299287 Gm)
Perihelion 0.8147659469931870 AU (121.88725078904 Gm)
1.382352308380551 AU (206.79696189096 Gm)
Eccentricity 0.4105945770454860
1.63 yr (593.64 d)
11.66 km/s
4.238177829113762°
0° 36m 23.124s / day
Inclination 8.919219794517500°
109.3988686409290°
293.3615601390300°
Earth MOID 0.00211551 AU (316,476 km)
Jupiter MOID 3.48355 AU (521.132 Gm)
Jupiter Tisserand parameter 4.693
Physical characteristics
Dimensions 390 m
Mass 8.3x1010 kg
19.7[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 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]