Tags: Planet.

21633 Hsingpenyuan (1999 NW11) is a main-belt asteroid discovered on July 13 1999 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.

apoapsis (km)
3.84912e+11
orbital period (μ)
1.14795e+08
periapsis (km)
3.22757e+11
absolute magnitude
14.3
discovery date
1999-07-13
discoverer
Lincoln Near-Earth Asteroid Research
epoch
May 14 2008
former name
1999 NW11

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