(386454) 2008 XM

(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.

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. 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 and. Its Earth minimum orbital intersection distance of 0.0047 AU corresponds to only 1.9 lunar distances.

Physical characteristics
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures $0.367$ meters in diameter and its surface has an albedo of 0.128. As of 2016, the body's composition and spectral type, as well as its rotation period and shape remains unknown.

Naming
As of 2020, this minor planet remains unnamed.