(21696) Ermalmquist Main-belt Asteroid
Discovered on 7 September 1999 by LINEAR at Socorro.
Eric Ragnarson Malmquist (b. 1987) was awarded second place in the 2005 Intel International Science and Engineering Fair for his biochemistry project. He attends the Westside High School, Macon, Georgia, U.S.A.Naming citation (20050822/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Ermalmquist is today
Seen from above the solar system on 2026-10-14: Ermalmquist is 2.48 au from the Sun and 3.46 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21696 |
| Provisional designation | 1999 RC52 |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.41 km (#8,370 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0520 |
| Absolute magnitude (H) | 15.03 |
| Orbital period | 3.51 years |
| Semi-major axis | 2.31 au |
| Perihelion – aphelion | 1.88 – 2.74 au |
| Eccentricity | 0.184 |
| Inclination | 3.54° |
| Closest distance between its orbit and Earth's (MOID) | 0.875 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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