(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 a 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 (137924) 2000 BD19 and (374158) 2004 UL. Its Earth minimum orbital intersection distance of 0.0047 AU (700,000 km) 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 367±9 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. == References == == External links == Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine) Asteroids and comets rotation curves, CdR Archived 29 July 2016 at the Wayback Machine – Observatoire de Genève, Raoul Behrend (386454) 2008 XM at NeoDyS-2, Near Earth Objects—Dynamic Site Ephemerides · Observation prediction · Orbital info · MOID · Proper elements · Observational info · Close approaches · Physical info · Orbit animation (386454) 2008 XM at ESA–space situational awareness Ephemerides · Observations · Orbit · Physical properties · Summary (386454) 2008 XM at the JPL Small-Body Database