(21638) Nicjachowski Main-belt Asteroid
Discovered on 14 July 1999 by LINEAR at Socorro.
Nicholas Robert Apau Jachowski (b. 1986) was awarded first place and Best in Category in the 2005 Intel International Science and Engineering Fair for his earth science project. He attends the West Potomac High School, Alexandria, Virginia, U.S.A.Naming citation (20050822/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Nicjachowski is today
Seen from above the solar system on 2026-10-14: Nicjachowski is 2.50 au from the Sun and 3.48 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21638 |
| Provisional designation | 1999 NA39 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.57 |
| Orbital period | 3.51 years |
| Semi-major axis | 2.31 au |
| Perihelion – aphelion | 1.86 – 2.76 au |
| Eccentricity | 0.196 |
| Inclination | 1.80° |
| Closest distance between its orbit and Earth's (MOID) | 0.845 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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