(21519) Josephhenry Main-belt Asteroid
Discovered on 23 May 1998 by LINEAR at Socorro.
Joseph Kent Henry (b. 1989) was awarded second place in the 2006 Intel International Science and Engineering Fair for his environmental sciences team project. He attends the Bishop Moore Catholic High School, Orlando, Florida, U.S.A.Naming citation (20060711/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Josephhenry is today
Seen from above the solar system on 2026-10-14: Josephhenry is 2.46 au from the Sun and 3.10 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21519 |
| Provisional designation | 1998 KR54 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.76 km (#13,304 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.376 |
| Absolute magnitude (H) | 14.01 |
| Orbital period | 3.71 years |
| Semi-major axis | 2.40 au |
| Perihelion – aphelion | 2.11 – 2.69 au |
| Eccentricity | 0.120 |
| Inclination | 14.0° |
| Closest distance between its orbit and Earth's (MOID) | 1.16 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Joseph
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