(386454) 2008 XM
| Discovery [1] | |
|---|---|
| Discovered by | LINEAR |
| Discovery site | Lincoln Lab's ETS |
| Discovery date | 2 December 2008 |
| Designations | |
| MPC designation | (386454) 2008 XM |
| 2008 XM | |
| Apollo · NEO · PHA | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 5.16 yr (1,884 days) |
| Aphelion | 2.3335 AU |
| Perihelion | 0.1111 AU |
| 1.2223 AU | |
| Eccentricity | 0.9091 |
| 1.35 yr (494 days) | |
| 272.91° | |
| 0° 43m 45.84s / day | |
| Inclination | 5.4464° |
| 240.63° | |
| 27.363° | |
| Earth MOID | 0.0047 AU |
| Physical characteristics | |
| Dimensions | 0.367±0.009 km[2] |
| 0.128±0.032[2] | |
| 20.0[1] | |
|
| |
(386454) 2008 XM is an outstandingly eccentric, small asteroid, with one of the smallest known perihelions among all minor planets. It is classified as near-Earth object of the Apollo group and potentially hazardous asteroid, and measures approximately 370 meters in diameter. It was discovered on 2 December 2008, by the U.S. LINEAR program at Lincoln Laboratory's Experimental Test Site in Socorro, New Mexico.[3]
The asteroid orbits the Sun at a distance of 0.1–2.3 AU once every 16 months (494 days). Its orbit has an eccentricity of 0.91 and an inclination of 5° with respect to the ecliptic.[1] Due to its outstanding eccentricity, it is also a Mercury-crosser, Venus-crosser and Mars-crosser. It has the third-smallest perihelion of any numbered asteroid behind (137924) 2000 BD19 and (374158) 2004 UL. Its Earth minimum orbital intersection distance of 0.0047 AU (700,000 km) corresponds to only 1.84 lunar distances.[1]
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 367±9 meters in diameter and its surface has an albedo of 0.128.[2] As of 2016, the body's composition and spectral type, as well as its rotation period and shape remains unknown.[1]
References
- 1 2 3 4 5 6 "JPL Small-Body Database Browser: 386454 (2008 XM)" (2014-01-29 last obs.). Jet Propulsion Laboratory. Retrieved 26 October 2016.
- 1 2 3 Mainzer, A.; Bauer, J.; Grav, T.; Masiero, J.; Cutri, R. M.; Wright, E.; et al. (April 2014). "The Population of Tiny Near-Earth Objects Observed by NEOWISE". The Astrophysical Journal. 784 (2): 7. arXiv:1310.2980
. Bibcode:2014ApJ...784..110M. doi:10.1088/0004-637X/784/2/110. Retrieved 26 October 2016. - ↑ "386454 (2008 XM)". Minor Planet Center. Retrieved 26 October 2016.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (385001)-(390000) – Minor Planet Center
- (386454) 2008 XM at the JPL Small-Body Database