(21621) Sherman Main-belt Asteroid
Discovered on 20 May 1999 by LINEAR at Socorro.
Eric Alan Sherman (b. 1993) was awarded second place in the 2006 Intel International Science and Engineering Fair for his microbiology project. He attends the Ephrata Senior High School, Ephrata, Pennsylvania, U.S.A.Naming citation (20060711/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
👶 Sherman as a baby name🐶 Sherman as a dog name🐱 Sherman as a cat name
Where Sherman is today
Seen from above the solar system on 2026-10-14: Sherman is 2.80 au from the Sun and 2.89 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21621 |
| Provisional designation | 1999 KR4 |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.08 km (#6,499 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0570 |
| Absolute magnitude (H) | 14.55 |
| Orbital period | 3.71 years |
| Semi-major axis | 2.40 au |
| Perihelion – aphelion | 1.78 – 3.01 au |
| Eccentricity | 0.258 |
| Inclination | 8.71° |
| Closest distance between its orbit and Earth's (MOID) | 0.787 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Eric
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All asteroids named after someone called Eric