(417634) 2006 XG1
Near-Earth asteroid
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(417634) 2006 XG1 provisional designation 2006 XG1, is a sub-kilometer asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, that had a low but non-zero probability of impacting Earth on 31 October 2041. The asteroid was discovered on 20 September 2006, by astronomers of the Catalina Sky Survey, using a dedicated 0.68-meter telescope at Mount Lemmon Observatory in Arizona, United States.[2][3][5]
| Discovery[1][2][3] | |
|---|---|
| Discovered by | CSS |
| Discovery site | Mount Lemmon Obs. |
| Discovery date | 11 December 2006 |
| Designations | |
| (417634) 2006 XG1 | |
| 2006 XG1 | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 8.09 yr (2,956 days) |
| Aphelion | 3.9218 AU |
| Perihelion | 0.9943 AU |
| 2.4580 AU | |
| Eccentricity | 0.5955 |
| 3.85 yr (1,408 days) | |
| 287.03° | |
| 0° 15m 20.88s / day | |
| Inclination | 20.493° |
| 38.478° | |
| 344.11° | |
| Earth MOID | 0.0157 AU (6.1 LD) |
| Physical characteristics | |
| 0.418±0.081 km[4] | |
| Mass | 4.2Ã1011 kg (estimate) |
| 0.154±0.061[4] | |
| 18.5[1] | |
Description
Originally listed with a Torino Scale hazard rating of 0, this was raised to a rating of 1 on 22 December 2006 as a result of additional observations and refinement of the orbital calculations.[5] However, on 9 January 2007 it was returned to a rating of 0. It was removed from the Sentry Risk Table on 7 February 2007.[6]
It is now known that the asteroid will not make a close approach to the Earth in 2041.[1] On 31 October 2041, the asteroid will be 1.69 AU (253,000,000 km; 157,000,000 mi) from the Earth.[7][8] 2006 XG1 passed 0.0298 AU (4,460,000 km; 2,770,000 mi) from asteroid 87 Sylvia on 20 June 1969.[1] It is also a Mars-crosser asteroid.
Physical characteristics
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, 2006 XG1 measures 418 meters in diameter and its surface has an albedo of 0.154.[4] Previously, JPL's Sentry System estimated a diameter of 670 meters with a mass of 4.2Ã1011 kg.[citation needed]
