Asteroid 2014 JE15 passed by the Earth at a distance of 15 810 000 km (over 40 times the average distance between the Earth and the Moon) slightly before 2.30 am on Wednesday 28 May 2014. There was no danger of the asteroid hitting us, and had it done so it would not have presented a serious threat. 2014 JE15 is calculated to have an equivalent diameter of 16-52 m (i.e. a spherical object with the same volume would be 16-52 m in diameter), and an object of this size would be expected to break up in the atmosphere between 26 and 7 km above the Earth's surface, with only fragmentary material reaching the ground.
The calculated orbit of 2014 JE15. JPL Small Body Database Browser.
2014 JE15 was discovered on 2 May 2014 by the Dark Energy Camera at the Cerro Tololo Inter-American Observatory in Chile. The designation 2014 JE15 indicates that it was the 380th asteroid (asteroid E15) discovered in the first half of May 2014 (period 2014 J).
While 2014 JE15 occasionally comes near to the Earth, it does not actually cross our orbital path. It has an elliptical 1257 day orbit, that takes it from 1.11 AU from the Sun (1.11 times the distance at which the Earth orbits the Sun), slightly outside our orbit, to 3.50 AU from the Sun, (3.50 times the distance at which the Earth orbits the Sun, and considerably more than twice the distance at which the planet Mars orbits the Sun). As a Near Earth Object that remains strictly outside the orbit of the Earth it is classed as an Amor Family Asteroid.
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