(18858) Tecleveland Main-belt Asteroid
Discovered on 9 September 1999 by LINEAR at Socorro.
Thomas Edgar Cleveland (b. 1985) was awarded third place in the 2003 Intel International Science and Engineering Fair for his microbiology project. He attends the Louisiana School for Math, Science, and the Arts, Natchitoches, Louisiana, U.S.A.Naming citation (20040830/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Tecleveland is today
Seen from above the solar system on 2026-10-14: Tecleveland is 2.24 au from the Sun and 3.18 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 18858 |
| Provisional designation | 1999 RO117 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.60 km (#9,572 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0920 |
| Absolute magnitude (H) | 14.2 |
| Orbital period | 4.09 years |
| Semi-major axis | 2.56 au |
| Perihelion – aphelion | 2.23 – 2.89 au |
| Eccentricity | 0.128 |
| Inclination | 9.98° |
| Closest distance between its orbit and Earth's (MOID) | 1.26 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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