(25521) Stevemorgan Main-belt Asteroid
Discovered on 7 December 1999 by LINEAR at Socorro.
Steve Morgan mentored a finalist in the 2009 Intel Science Talent Search (STS), a science competition for high school seniors. He teaches at the Corona del Sol High School, Tempe, Arizona.Naming citation (20090311/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Stevemorgan is today
Seen from above the solar system on 2026-10-14: Stevemorgan is 2.35 au from the Sun and 3.24 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 25521 |
| Provisional designation | 1999 XH103 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.38 km (#11,877 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0450 |
| Rotation period | 32.3 hours |
| Absolute magnitude (H) | 15.22 |
| Orbital period | 3.59 years |
| Semi-major axis | 2.34 au |
| Perihelion – aphelion | 1.91 – 2.77 au |
| Eccentricity | 0.184 |
| Inclination | 3.01° |
| Closest distance between its orbit and Earth's (MOID) | 0.903 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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