Tags: Planet.
The asteroid 2100 Ra-Shalom was discovered in 1978 by Eleanor F. Helin. It was the second asteroid in the Aten class after the discovery of 2062 Aten in 1976 also by Helin. The Atens have a semi-major axis of less than 1 AU; of the Atens Ra-Shalom is one of the asteroids with the smallest semi-major axes: just 0.832 AU. It comes within 30 Gm of Mars Earth Venus and Mercury. The closest approaches are to Mercury to about 0.0784 AU (11.7 Gm).
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