Tags: Planet.

5621 Erb (1990 SG4) is a Mars-crossing asteroid discovered on September 23 1990 by Kenneth J. Lawrence at Palomar Observatory.

apoapsis (km)
4.76974e+11
orbital period (μ)
1.10361e+08
periapsis (km)
2.12353e+11
absolute magnitude
13.9
discovery date
1990-09-23
discoverer
Kenneth J. Lawrence
epoch
May 14 2008
former name
1990 SG4

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