Astronomy:(386454) 2008 XM
| Discovery[1] | |
|---|---|
| Discovered by | LINEAR |
| Discovery site | Lincoln Lab's ETS |
| Discovery date | 2 December 2008 |
| Designations | |
| (386454) 2008 XM | |
| 2008 XM | |
| Minor planet category | 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) |
| |{{{apsis}}}|helion}} | 2.3334 AU |
| |{{{apsis}}}|helion}} | 0.1111 AU |
| 1.2222 AU | |
| Eccentricity | 0.9091 |
| Orbital period | 1.35 yr (494 days) |
| Mean anomaly | 204.67° |
| Mean motion | 0° 43m 45.84s / day |
| Inclination | 5.4478° |
| Longitude of ascending node | 240.63° |
| 27.357° | |
| Earth MOID | 0.0048 AU · 1.9 LD |
| Physical characteristics | |
| Mean diameter | 0.367±0.009 km[3] |
| Geometric albedo | 0.128±0.032[3] |
| Absolute magnitude (H) | 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
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "JPL Small-Body Database Browser: 386454 (2008 XM)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2386454. Retrieved 2 June 2017.
- ↑ 2.0 2.1 2.2 "386454 (2008 XM)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=386454. Retrieved 26 October 2016.
- ↑ 3.0 3.1 3.2 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. doi:10.1088/0004-637X/784/2/110. Bibcode: 2014ApJ...784..110M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...784..110M. Retrieved 26 October 2016.
External links
- Asteroid Lightcurve Database (LCDB), query form (info )
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- (386454) 2008 XM at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
- (386454) 2008 XM at ESA–space situational awareness
- (386454) 2008 XM at the JPL Small-Body Database
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