A

David

Darling

2100 Ra-Shalom

2100 Ra-Shalom is the largest known of the Aten group of Earth-crossing asteroids. Discovered in 1978 by the American astronomer Eleanor Helin (1932–2009), it has a year shorter than Earth's.

 

diameter 2.4 km
spectral class C
rotational period 19.79 hours
semimajor axis 0.832 AU
perihelion 0.469 AU
aphelion 1.195 AU
eccentricity 0.436
inclination 15.7°