(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 | 4.2×1011 kg (estimate) |
| 0.154±0.061[4] | |
| 18.5[1] | |
Description
editOriginally 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
editAccording 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]
References
edit- ^ a b c d e f "JPL Small-Body Database Browser: 417634 (2006 XG1)" (2015-01-14 last obs.). Jet Propulsion Laboratory. Retrieved 20 January 2018.
- ^ a b c "417634 (2006 XG1)". Minor Planet Center. Retrieved 20 January 2018.
- ^ a b "MPEC 2006-X35 : 2006 XG1 – (K06X01G)". IAU Minor Planet Center. 11 December 2006. Retrieved 20 January 2018.
- ^ a b c Mainzer, A.; Grav, T.; Masiero, J.; Bauer, J.; Cutri, R. M.; McMillan, R. S.; et al. (November 2012). "Physical Parameters of Asteroids Estimated from the WISE 3-Band Data and NEOWISE Post-Cryogenic Survey". The Astrophysical Journal Letters. 760 (1): 6. arXiv:1210.0502. Bibcode:2012ApJ...760L..12M. doi:10.1088/2041-8205/760/1/L12. S2CID 41459166. Retrieved 20 January 2018.
- ^ a b Fraser Cain (27 December 2006). "Close Call with Asteroid 2006 XG1 in 2041". Universe Today. Retrieved 28 December 2007.
- ^ "Sentry: Earth Impact Monitoring – Removed Objects". NASA/JPL CNEOS – Center for Near-Earth Object Studies. Retrieved 20 January 2018.
- ^ "NEODyS-2 EPHEMERIDES for 2006XG1 on 2041-Oct-31". Near Earth Objects – Dynamic Site. Retrieved 20 March 2012.
- ^ Horizons output. "Observer Table for Asteroid (2006 XG1)". Retrieved 24 July 2011. (Observer Location: Geocentric)
External links
edit- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- (417634) 2006 XG1 at NeoDyS-2, Near Earth Objects—Dynamic Site
- XG1 (417634) 2006 XG1 at ESA–space situational awareness
- (417634) 2006 XG1 at the JPL Small-Body Database
