|Discovered by||Catalina Sky Survey|
|Discovery date||December 12, 2012|
|Epoch 13 January 2016 (JD 2457400.5)|
|Uncertainty parameter 6|
|Aphelion||1.0360 AU (154.98 Gm)|
|Perihelion||0.40995 AU (61.328 Gm)|
|0.72300 AU (108.159 Gm)|
|0.61 yr (224.5 d)|
|Earth MOID||0.00246932 AU (369,405 km)|
Discovery, orbit and physical properties
2012 XE133 was first observed on 12 December 2012 by J. A. Johnson working for the Catalina Sky Survey. As of March 2013, it has been observed 102 times with a data-arc span of 28 days. It is an Aten asteroid and its semi-major axis of 0.72 AU is very similar to that of Venus but its eccentricity is rather large (0.4332) and its inclination of 6.7° is also significant. With an absolute magnitude of 23.4, it has a diameter of approximately 62 to 138 meters.
Quasi-satellite dynamical state and orbital evolution
2012 XE133 has been identified as a Venus co-orbital following a transitional path between Venus's Lagrangian points L5 point and L3 point. Besides being a Venus co-orbital, this asteroid is also a Mercury grazer and an Earth crosser. 2012 XE133 exhibits resonant (or near-resonant) behavior with Mercury, Venus and the Earth. Its short-term dynamical evolution is similar to that of two other Venus co-orbitals, 2001 CK32 and 2002 VE68.
Potentially hazardous asteroid
2012 XE133 was included in the Minor Planet Center list of Potentially Hazardous Asteroids (PHAs) because it comes to within 0.05 AU of Earth periodically, but it has since been removed. It will approach Earth at 0.0055 AU (and the Moon at 0.0045 AU) on 30 December 2028.
- ^ This is assuming an albedo of 0.25–0.05.
- List Of Aten Minor Planets
- "2012 XE133". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 3620867. Retrieved 3 April 2016.
- "Asteroid Size Estimator". CNEOS NASA/JPL. Retrieved 16 February 2018.
- de la Fuente Marcos, C.; de la Fuente Marcos, R. "Asteroid 2012 XE133, a transient companion to Venus". Monthly Notices of the Royal Astronomical Society. 432 (2): 886–893. arXiv:1303.3705. Bibcode:2013MNRAS.432..886D. doi:10.1093/mnras/stt454.
- Further reading
- Understanding the Distribution of Near-Earth Asteroids Bottke, W. F., Jedicke, R., Morbidelli, A., Petit, J.-M., Gladman, B. 2000, Science, Vol. 288, Issue 5474, pp. 2190–2194.
- A Numerical Survey of Transient Co-orbitals of the Terrestrial Planets Christou, A. A. 2000, Icarus, Vol. 144, Issue 1, pp. 1–20.
- Debiased Orbital and Absolute Magnitude Distribution of the Near-Earth Objects Bottke, W. F., Morbidelli, A., Jedicke, R., Petit, J.-M., Levison, H. F., Michel, P., Metcalfe, T. S. 2002, Icarus, Vol. 156, Issue 2, pp. 399–433.
- Transient co-orbital asteroids Brasser, R., Innanen, K. A., Connors, M., Veillet, C., Wiegert, P., Mikkola, S., Chodas, P. W. 2004, Icarus, Vol. 171, Issue 1, pp. 102–109.
- The population of Near Earth Asteroids in coorbital motion with Venus Morais, M. H. M., Morbidelli, A. 2006, Icarus, Vol. 185, Issue 1, pp. 29–38.
- Asteroid 2012 XE133: a transient companion to Venus de la Fuente Marcos, C., de la Fuente Marcos, R. 2013, Monthly Notices of the Royal Astronomical Society, Vol. 432, Issue 2, pp. 886–893.
- AstDys-2 on 2012 XE133 Retrieved 2013-02-20