2013 LX28-The Daily Ledger

, is an asteroid, classified as near-Earth object of the Apollo group that is a temporary quasi-satellite of the Earth, the third known Earth quasi-satellite.

Discovery, orbit and physical properties

was discovered on 12 June 2013. As of September 2014, it has been observed 26 times with a data-arc span of 349 days. It is an Apollo asteroid and its semi-major axis (1.0016 AU) is very similar to that of the Earth but it has relatively high eccentricity (0.4521) and high orbital inclination (49.9761°). With an absolute magnitude of 21.7, it has a diameter in the range 130–300 m (for an assumed albedo range of 0.04–0.20).

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Quasi-satellite dynamical state and orbital evolution

has been identified as an Earth quasi-satellite following a kidney-shaped retrograde orbit around the Earth.

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Notes

This is assuming an albedo of 0.20–0.04.

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References

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. A Kozai-resonating Earth quasi-satellite Connors, M. 2014, Monthly Notices of the Royal Astronomical Society, Vol. 437, Issue 1, pp. L85–L89. Asteroid 2014 OL339: yet another Earth quasi-satellite de la Fuente Marcos, C., de la Fuente Marcos, R. 2014, Monthly Notices of the Royal Astronomical Society, Vol. 445, Issue 3, pp. 2985–2994.