2010 AU118
| Discovery[1] | |
|---|---|
| Discovered by | WISE (C51) |
| Discovery date | 27 May 2010 |
| Designations | |
| MPC designation | 2010 AU118 |
| Amor NEO[2] | |
| Orbital characteristics[2] | |
|
Epoch 2010-Jan-15 (Uncertainty=9)[2] | |
| Aphelion | 2.1 ± 0.8 AU (Q) |
| Perihelion | 1.1 ± 0.3 AU (q) |
| 1.6 ± 0.6 AU (a) | |
| Eccentricity | 0.3? |
| 2.06 ± 1.1 yr | |
| 109 ± 90° (M) | |
| Inclination | 43.7 ± 3.1° |
| 35 ± 15° | |
| 340 ± 50° | |
| Physical characteristics | |
| Dimensions | ~894 meters[3] |
| Mass | 9.7×1011 kg (assumed)[3] |
| 17.6[2] | |
|
| |
2010 AU118 (also written 2010 AU118) is an Amor near-Earth asteroid with an observation arc of only two days and thus a poorly determined orbit.[2] It was announced on 27 May 2010 based on images taken by the Wide-field Infrared Survey Explorer (WISE) on 13–15 January 2010.[1] It was removed from the Sentry Risk Table on 14 June 2014 as a result of an update to the Sentry software.[4]
It is estimated to be 900 meters (3,000 ft) in diameter.[3] It has a poorly constrained orbit with an uncertainty parameter of 9.[2] Until the June 2014 solution, virtual clones of the asteroid, that fit the uncertainty region in the known trajectory, showed a 1 in 769,231,000 chance that the asteroid could impact the Earth on 2020 October 20.[3] With a Palermo Technical Scale of −4.26,[3] the odds of an impact by 2010 AU118 in 2020 were about 18000 times less[5] than the background hazard level of Earth impacts, which is defined as the average risk posed by objects of the same size or larger over the years until the date of the potential impact.[6]
References
- 1 2 "MPEC 2010-K65 : 2010 AU118". IAU Minor Planet Center. 2010-05-27. Retrieved 2012-03-17. (K10AB8U)
- 1 2 3 4 5 6 "JPL Small-Body Database Browser: (2010 AU118)" (last observation: 2010-01-15; arc: 2 days). Jet Propulsion Laboratory. Retrieved 2012-03-17.
- 1 2 3 4 5 "Earth Impact Risk Summary: 2013 BP73" (computed on Aug 06, 2013). Wayback Machine: NASA/JPL Near-Earth Object Program Office. Archived from the original on April 3, 2014. Retrieved 2014-06-27.
- ↑ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 2014-01-23.
- ↑ Math: 104.26 = 18197
- ↑ "The Palermo Technical Impact Hazard Scale". NASA/JPL Near-Earth Object Program Office. 31 Aug 2005. Retrieved 2011-10-14.
External links
- Orbital simulation from JPL (Java) / Ephemeris
- 2010 AU118 at the JPL Small-Body Database
