2100 Ra-Shalom

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2100 Ra-Shalom
2100Ra-Shalom (Lightcurve Inversion).png
A three-dimensional model of 2100 Ra-Shalom based on its light curve.
Discovery[1]
Discovered by EF Helin
Discovery site Palomar
Discovery date 1978-Sep-10
Designations
Minor planet category Aten NEO[1]
Orbital characteristics[1]
Epoch 2014-May-23
(Uncertainty=0)[1]
Aphelion 1.195 AU (Q)
Perihelion 0.4688 AU (q)
0.8320 AU (a)
Eccentricity 0.4364
277.2 days
Inclination 15.75 degrees
Physical characteristics
Dimensions 2.3 ± 0.2 km[1]
19.797 hr[1]
Albedo 0.13[1]
16.05[1]

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).[2] In 1981, this object was detected using radar, revealing a relatively smooth surface at decimeter scales.[3]

The name of the asteroid, which refers to the Egyptian god Ra and the Hebrew word Shalom, refers to the Camp David Peace Accords between Egypt and Israel.

References[edit]

  1. ^ a b c d e f g h "JPL Small-Body Database Browser: 2100 Ra-Shalom (1978 RA)". Jet Propulsion Laboratory. 2013-10-25 last obs (arc=38 yr). Retrieved 2014-02-23. 
  2. ^ "JPL Close-Approach Data: 2100 Ra-Shalom (1978 RA)". 2013-10-25 last obs. Retrieved 2009-05-05. 
  3. ^ Ostro, S. J.; Harris, A. W.; Campbell, D. B.; Shapiro, I. I.; Young, J. W. (November 1984), "Radar and photoelectric observations of asteroid 2100 Ra-Shalom", Icarus 60: 391–403, Bibcode:1984Icar...60..391O, doi:10.1016/0019-1035(84)90198-2 

External links[edit]