(21439) Robenzing Main-belt Asteroid
Discovered on 20 March 1998 by LINEAR at Socorro.
Robert Benzing mentored a finalist in the 2005 Intel Science Talent Search, a science competition for high school seniors. He teaches at the Hendrick Hudson High School, Montrose, New York.Naming citation (20050224/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Robenzing is today
Seen from above the solar system on 2026-10-14: Robenzing is 2.44 au from the Sun and 3.36 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21439 |
| Provisional designation | 1998 FN123 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.19 km (#16,791 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.279 |
| Absolute magnitude (H) | 15.74 |
| Orbital period | 3.59 years |
| Semi-major axis | 2.34 au |
| Perihelion – aphelion | 2.07 – 2.61 au |
| Eccentricity | 0.115 |
| Inclination | 3.56° |
| Closest distance between its orbit and Earth's (MOID) | 1.09 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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