 In 2058, Cruithne will come within 0.09 AU () of Mars.Due to a high orbital eccentricity, Cruithne's distance from the Sun and orbital speed varies a lot more than the Earth's, so from the Earth's point of view Cruithne actually follows a kidney-bean-shaped horseshoe orbit ahead of the Earth, taking slightly less than one year to complete a circuit of the "bean".Because it takes slightly "less" than a year, the Earth "falls behind" the bean a little more each year, and so from our point of view, the circuit is not quite closed, but rather like a spiral loop that moves slowly away from the Earth.