Tags: Planet.

21989 Werntz (1999 XU20) is a main-belt asteroid discovered on December 5 1999 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.

apoapsis (km)
5.51133e+11
orbital period (μ)
1.73739e+08
periapsis (km)
3.81719e+11
absolute magnitude
14.3
discovery date
1999-12-05
discoverer
Lincoln Near-Earth Asteroid Research
epoch
May 14 2008
former name
1999 XU20

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