A near-Earth asteroid (NEA) with perihelion distances between 1.017 and 1.3 astronomical units. The Amor asteroids approach the orbit of the Earth from beyond, but do not intersect it. Most Amors do c
ross the orbit of Mars. It is estimated that 32% of the total number of NEAs are Amors. One of the larger Amors is Eros.
Hoarfrost that possesses no apparent simple crystalline structure; opposite of crystalline frost. The lack of distinct crystal structure in forms of amorphous frost, however, is only a matter of scale
. Such frost is built up of a multitude of units each of which has its own crystal structure, although no unit fits compatibly with its neighboring unit.