(15021) Alexkardon Main-belt Asteroid
Discovered on 26 September 1998 by LINEAR at Socorro.
Alex Kardon (b. 1985) was named a finalist in the 2003 Intel Science Talent Search, a science competition for high school seniors, for his behavioral and social sciences project. He attends the South Side High School, Rockville Centre, New York.Naming citation (20030216/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Alexkardon is today
Seen from above the solar system on 2026-10-14: Alexkardon is 2.61 au from the Sun and 2.81 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 15021 |
| Provisional designation | 1998 SX123 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.39 km (#16,467 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.257 |
| Absolute magnitude (H) | 15.55 |
| Orbital period | 3.61 years |
| Semi-major axis | 2.35 au |
| Perihelion – aphelion | 1.93 – 2.78 au |
| Eccentricity | 0.180 |
| Inclination | 2.64° |
| Closest distance between its orbit and Earth's (MOID) | 0.941 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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All asteroids named after someone called Alex
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