Astronomy:(417634) 2006 XG1
| Discovery[1][2][3] | |
|---|---|
| Discovered by | CSS |
| Discovery site | Mount Lemmon Obs. |
| Discovery date | 11 December 2006 |
| Designations | |
| (417634) 2006 XG1 | |
| 2006 XG1 | |
| Minor planet category | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 8.09 yr (2,956 days) |
| |{{{apsis}}}|helion}} | 3.9218 AU |
| |{{{apsis}}}|helion}} | 0.9943 AU |
| 2.4580 AU | |
| Eccentricity | 0.5955 |
| Orbital period | 3.85 yr (1,408 days) |
| Mean anomaly | 287.03° |
| Mean motion | 0° 15m 20.88s / day |
| Inclination | 20.493° |
| Longitude of ascending node | 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) |
| Geometric albedo | 0.154±0.061[4] |
| Absolute magnitude (H) | 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]
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 astronomical unit|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 4.2×1011 kg.[citation needed]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "JPL Small-Body Database Browser: 417634 (2006 XG1)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2417634. Retrieved 20 January 2018.
- ↑ 2.0 2.1 2.2 "417634 (2006 XG1)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=417634. Retrieved 20 January 2018.
- ↑ 3.0 3.1 "MPEC 2006-X35 : 2006 XG1 – (K06X01G)". IAU Minor Planet Center. 2006-12-11. https://www.minorplanetcenter.net/mpec/K06/K06X35.html. Retrieved 20 January 2018.
- ↑ 4.0 4.1 4.2 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. doi:10.1088/2041-8205/760/1/L12. Bibcode: 2012ApJ...760L..12M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...760L..12M. Retrieved 20 January 2018.
- ↑ 5.0 5.1 Fraser Cain (27 December 2006). "Close Call with Asteroid 2006 XG1 in 2041". Universe Today. http://www.universetoday.com/1139/close-call-with-asteroid-2006-xg1-in-2041/. Retrieved 2007-12-28.
- ↑ "Sentry: Earth Impact Monitoring – Removed Objects". NASA/JPL CNEOS – Center for Near-Earth Object Studies. https://cneos.jpl.nasa.gov/sentry/removed.html. Retrieved 20 January 2018.
- ↑ "NEODyS-2 EPHEMERIDES for 2006XG1 on 2041-Oct-31". Near Earth Objects – Dynamic Site. https://newton.spacedys.com/neodys/index.php?pc=1.1.3.1&n=2006XG1&oc=500&y0=2041&m0=10&d0=30&h0=0&mi0=0&y1=2041&m1=11&d1=02&h1=0&mi1=0&ti=1.0&tiu=days. Retrieved 2012-03-20.
- ↑ Horizons output. "Observer Table for Asteroid (2006 XG1)". http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2006XG1. Retrieved 2011-07-24. (Observer Location: Geocentric)
External links
- Asteroid Lightcurve Database (LCDB), query form (info )
- (417634) 2006 XG1 at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
- XG1 (417634) 2006 XG1 at ESA–space situational awareness
- (417634) 2006 XG1 at the JPL Small-Body Database
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