(113394) Niebur Main-belt Asteroid
Discovered on 26 September 2002 by NEAT at Palomar.
Trained as an astrophysicist, Susan Niebur (1978-2012) was a former Discovery Program Scientist at NASA and contributed to space-science policy. She founded the Women in Planetary Science and Toddler Planet websites. Name suggested by A. Sohus.Naming citation (20120406/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Niebur is today
Seen from above the solar system on 2026-10-14: Niebur is 2.72 au from the Sun and 2.52 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 113394 |
| Provisional designation | 2002 SN21 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 16.11 |
| Orbital period | 4.62 years |
| Semi-major axis | 2.77 au |
| Perihelion – aphelion | 2.58 – 2.97 au |
| Eccentricity | 0.0688 |
| Inclination | 1.29° |
| Closest distance between its orbit and Earth's (MOID) | 1.58 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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