(386454) 2008 XM

(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
Alternative designations	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)
Aphelion	2.3334 AU
Perihelion	0.1111 AU
Semi-major axis	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°
Argument of perihelion	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. 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

"JPL Small-Body Database Browser: 386454 (2008 XM)" (2014-01-29 last obs.). Jet Propulsion Laboratory. Retrieved 2 June 2017.
"386454 (2008 XM)". Minor Planet Center. Retrieved 26 October 2016.
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)
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
- Ephemerides · Observations · Orbit · Physical Properties · Summary
(386454) 2008 XM at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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[jpldata-1] "JPL Small-Body Database Browser: 386454 (2008 XM)" (2014-01-29 last obs.). Jet Propulsion Laboratory. Retrieved 2 June 2017.

[MPC-386454-2] "386454 (2008 XM)". Minor Planet Center. Retrieved 26 October 2016.

[Mainzer-2014-3] 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.

Planetary defense
Main topics	Asteroid Bolide Earth-grazing fireball Impact event List of meteor air bursts Meteor procession Meteor shower Meteorite Meteoroid Near-Earth object Potentially hazardous object
Defense	Asteroid impact avoidance Asteroid laser ablation Gravity tractor Ion-beam shepherd Asteroid close approaches Earth-crossing minor planets Damage scales Palermo scale Torino scale
Space probes	Dawn Deep Impact AIDA Hera DART Halley Armada Hayabusa Hayabusa2 MASCOT NEAR Shoemaker NEA Scout New Horizons OSIRIS-REx PROCYON Rosetta Philae Stardust
NEO tracking	ATLAS Catalina Sky Survey LINEAR LONEOS NEAT NEODyS NEOSM NEOSSat OGS Telescope Orbit@home Pan-STARRS SCAP Sentinel Space Telescope Sentry Spacewatch WISE
Organizations	B612 Foundation Japan Spaceguard Association Meteoritical Society NEOShield Spaceguard The Spaceguard Foundation Space Situational Awareness Programme Planetary Defense Coordination Office
Potential threats	1950 DA 1994 WR₁₂ 101955 Bennu 2002 MN (410777) 2009 FD 2010 RF₁₂ 99942 Apophis
Film and television	The End of the World (1916) When Worlds Collide (1951) Gorath (1962) The Green Slime (1968) "The Paradise Syndrome" (1968) A Fire in the Sky (1978) Meteor (1979) "NOVA: Doomsday Asteroid" (1995) "The Magic School Bus: Out of This World" (1995) Asteroid (1997) Deep Impact (1998) Armageddon (1998) Judgment Day (1999) Post Impact (2004) Deadly Skies (2006) Super Comet: After the Impact (2007) "Danny Phantom in Phantom Planet" (2007) Impact (2009) "NOVA: Last Extinction" (2009) Meteor Storm (2010) "Horizon: Asteroids–The Good, the Bad and the Ugly" (2010) Melancholia (2011) "NOVA: Meteor Strike" (2013) "NOVA: Asteroid: Doomsday or Payday?" (2013) Avengers: Age of Ultron (2015)