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Discovery and designation
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| Discovery site | El Leoncito Station of the Felix Aguilar Observatory |
| Discovery date | June 20, 1974 |
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Designations
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| MPC designation | 2124 |
| Alternate name(s) | 1974 MK |
| Epoch May 14, 2008 | |
| Ap | 3.2928667 |
| Peri | 2.7585229 |
| Eccentricity | 0.0883010 |
| Orbital period | 1922.3662021 |
| Mean anomaly | 148.87885 |
| Inclination | 10.73291 |
| Longitude of ascending node | 47.20634 |
| Argument of peri | 254.22551 |
| Absolute magnitude (H) | 11.7 |
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.[1]
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