(21617) Johnhagen Main-belt Asteroid
Discovered on 13 May 1999 by LINEAR at Socorro.
John Thomas Hagen (b. 1988) was awarded second place in the 2005 Intel International Science and Engineering Fair for his space science project. He attends the Ayersville High School, Defiance, Ohio, U.S.A.Naming citation (20050822/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Johnhagen is today
Seen from above the solar system on 2026-10-14: Johnhagen is 2.54 au from the Sun and 3.18 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21617 |
| Provisional designation | 1999 JO119 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 14.95 |
| Orbital period | 3.58 years |
| Semi-major axis | 2.34 au |
| Perihelion – aphelion | 2.00 – 2.69 au |
| Eccentricity | 0.148 |
| Inclination | 2.43° |
| Closest distance between its orbit and Earth's (MOID) | 0.995 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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