(25584) Zhangnelson Main-belt Asteroid
Discovered on 15 December 1999 by LINEAR at Socorro.
Zhang Nelson (b. 1993) was awarded second place in the 2009 Intel International Science and Engineering Fair for his computer science project. He attends the Shanghai American School, Shanghai, China.Naming citation (20100428/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Zhangnelson is today
Seen from above the solar system on 2026-10-14: Zhangnelson is 2.60 au from the Sun and 3.54 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 25584 |
| Provisional designation | 1999 XO221 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.97 km (#12,829 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.135 |
| Absolute magnitude (H) | 15.08 |
| Orbital period | 4.29 years |
| Semi-major axis | 2.64 au |
| Perihelion – aphelion | 2.48 – 2.79 au |
| Eccentricity | 0.0585 |
| Inclination | 3.33° |
| Closest distance between its orbit and Earth's (MOID) | 1.50 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.