|Discovery site||El Leoncito Station of the Felix Aguilar Observatory|
|Discovery date||June 20, 1974|
|Epoch May 14, 2008|
2124 Nissen (1974 MK) is a main-belt asteroid discovered on June 20, 1974 by El Leoncito Station of the Felix Aguilar Observatory. It was named in memory of Juan Jose Nissen (1901-1978), first director of the Felix Aguilar Observatory, previously director of the Cordoba Observatory and a department head at the La Plata Observatory.
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