| Discovery [1] | |
|---|---|
| Discovered by | LINEAR |
| Discovery site | Lincoln Lab's ETS |
| Discovery date | 2 December 2008 |
| Designations | |
| (386454) 2008 XM | |
| 2008 XM | |
| Apollo · NEO · PHA [1] [2] | |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 ( JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 5.16 yr (1,884 days) |
| Aphelion | 2.3334 AU |
| Perihelion | 0.1111 AU |
| 1.2222 AU | |
| Eccentricity | 0.9091 |
| 1.35 yr (494 days) | |
| 204.67 ° | |
| 0° 43m 45.84s / day | |
| Inclination | 5.4478° |
| 240.63° | |
| 27.357° | |
| Earth MOID | 0.0048 AU · 1.9 LD |
| Physical characteristics | |
Mean diameter | 0.367±0.009 km [3] |
| 0.128±0.032 [3] | |
| 20.0 [1] | |
(386454) 2008 XM is a highly eccentric, sub-kilometer-sized asteroid, with one of the smallest known perihelions among all minor planets. It is classified as near-Earth object of the Apollo group and was discovered on 2 December 2008, by the LINEAR program at Lincoln Laboratory's Experimental Test Site in Socorro, New Mexico, United States. [2]
Orbit and classification
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.[ citation needed] Its Earth minimum orbital intersection distance of 0.0047 AU (700,000 km) corresponds to only 1.9 lunar distances. [1]
Physical characteristics
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. [3] As of 2016, the body's composition and spectral type, as well as its rotation period and shape remains unknown. [1]
Naming
As of 2020, this minor planet remains unnamed. [2]
References
- ^ a b c d e f g "JPL Small-Body Database Browser: 386454 (2008 XM)" (2014-01-29 last obs.). Jet Propulsion Laboratory. Retrieved 2 June 2017.
- ^ a b c "386454 (2008 XM)". Minor Planet Center. Retrieved 26 October 2016.
- ^ a b c 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.
External links
- Asteroid Lightcurve Database (LCDB), query form ( info Archived 16 December 2017 at the Wayback Machine)
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- (386454) 2008 XM at NeoDyS-2, Near Earth Objects—Dynamic Site
- (386454) 2008 XM at ESA– space situational awareness
- (386454) 2008 XM at the JPL Small-Body Database
