(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) | |
Average orbital speed | 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
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
- 1 2 "JPL Small-Body Database Browser: 2008 AF4". Retrieved 20 April 2016.
- 1 2 "WayBack Machine archive from 1 January 2008". Wayback Machine. 2008-01-15. Archived from the original on 2008-01-15. Retrieved 2013-09-07.
- ↑ "WayBack Machine archive from 14 February 2008". Wayback Machine. 2008-02-14. Archived from the original on 2008-02-14. Retrieved 2013-09-07.
- ↑ "WayBack Machine archive from 16 March 2008". Wayback Machine. 2008-03-16. Archived from the original on 2008-03-16. Retrieved 2013-09-07.
- ↑ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 2011-11-06.
- 1 2 "JPL Close-Approach Data: 332446 (2008 AF4)" (last observation: 2013-03-19; arc: 10.8 years). Retrieved 2013-09-07.
External links
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