Tags: Planet.

21447 Yungchieh (1998 HZ18) is a main-belt asteroid discovered on April 18 1998 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.

apoapsis (km)
4.28885e+11
orbital period (μ)
1.14667e+08
periapsis (km)
2.78257e+11
absolute magnitude
14.8
discovery date
1998-04-18
discoverer
Lincoln Near-Earth Asteroid Research
epoch
May 14 2008
former name
1998 HZ18

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