(2124) Nissen Main-belt Asteroid
Discovered on 20 June 1974 by Felix Aguilar Observatory at El Leoncito.
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.Naming citation (MPC 5013), IAU / Minor Planet Center, via NASA/JPL
Where Nissen is today
Seen from above the solar system on 2026-10-14: Nissen is 2.79 au from the Sun and 3.36 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 2124 |
| Provisional designation | 1974 MK |
| Orbit class | Main-belt Asteroid |
| Diameter | 14.6 km (#3,237 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.170 |
| Absolute magnitude (H) | 12.03 |
| Orbital period | 5.25 years |
| Semi-major axis | 3.02 au |
| Perihelion – aphelion | 2.73 – 3.31 au |
| Eccentricity | 0.0966 |
| Inclination | 10.7° |
| Closest distance between its orbit and Earth's (MOID) | 1.74 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Juan
- (4270) Juanvictoria
- (5081) Sanguin
- (6505) Muzzio
- (6810) Juanclaria
- (8780) Forte
- (9284) Juansanchez
- (10691) Sans
- (10700) Juanangelviera
- (11193) Merida
- (11363) Vives
- (20423) Juanluisrizos
- (21045) Juangabriel
All asteroids named after someone called Juan