(21677) Tylerlyon Main-belt Asteroid
Discovered on 7 September 1999 by LINEAR at Socorro.
Tyler Glen Lyon (b. 1987) was awarded second place in the 2005 Intel International Science and Engineering Fair for his engineering team project. He attends the Copper Hills High School, West Jordan, Utah, U.S.A.Naming citation (20050822/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Tylerlyon is today
Seen from above the solar system on 2026-10-14: Tylerlyon is 2.83 au from the Sun and 3.12 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21677 |
| Provisional designation | 1999 RO23 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.22 |
| Orbital period | 4.00 years |
| Semi-major axis | 2.52 au |
| Perihelion – aphelion | 2.16 – 2.88 au |
| Eccentricity | 0.141 |
| Inclination | 3.62° |
| Closest distance between its orbit and Earth's (MOID) | 1.18 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Tyler
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- (18786) Tyjorgenson
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- (28451) Tylerhoward
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All asteroids named after someone called Tyler
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