Tags: Planet.

21621 Sherman (1999 KR4) is a main-belt asteroid discovered on May 20 1999 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.

apoapsis (km)
4.51449e+11
orbital period (μ)
1.17014e+08
periapsis (km)
2.6531e+11
absolute magnitude
14.5
discovery date
1999-05-20
discoverer
Lincoln Near-Earth Asteroid Research
epoch
May 14 2008
former name
1999 KR4

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