2100 Ra-Shalom
2100 Ra-Shalom (prov. designation: ) is an asteroid and near-Earth object of the Aten group on an eccentric orbit in the inner Solar System. It was discovered on 10 September 1978, by American astronomer Eleanor Helin at the Palomar Observatory, California, who named it in commemoration of the Camp David Peace Accords. The C-type asteroid (Xc, K) has a rotation period of 19.8 hours and measures approximately in diameter. Orbit and classification Ra-Shalom orbits the Sun at a distance of 0.5–1.2 AU once every 9 months (277 days). Its orbit has an eccentricity of 0.44 and an inclination of 16° with respect to the ecliptic. It was the second Aten asteroid to be discovered after 2062 Aten, the family's namesake, also discovered by Helin in 1976. The group of Aten asteroids feature a semi-major axis of less than 1 AU. Of this group, Ra-Shalom has one of the smallest semi-major axes, just 0.832 AU. The asteroid has an Earth minimum orbital intersection distance of which corresponds to 58.3 lunar distances, far too large to make it a potentially hazardous object. It also comes within 30 gigameter (Gm) of Mars, Venus and Mercury. The closest approaches are to Mercury, to about