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 | |
Mean diameter | 0.418±0.081 km [4] |
Mass | 4.2×1011 kg (estimate) |
0.154±0.061 [4] | |
18.5 [1] | |
(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]
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.
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 4.2×1011 kg.[ citation needed]