(21522) Entwisle Main-belt Asteroid
Discovered on 19 June 1998 by LINEAR at Socorro.
Richard William Entwisle (b. 1986) was awarded first place in the 2005 Intel International Science and Engineering Fair for his engineering project. He attends the Canford School, Dorset, United Kingdom.Naming citation (20050822/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Entwisle is today
Seen from above the solar system on 2026-10-14: Entwisle is 2.24 au from the Sun and 3.23 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21522 |
| Provisional designation | 1998 MX11 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 14.65 |
| Orbital period | 4.14 years |
| Semi-major axis | 2.58 au |
| Perihelion – aphelion | 2.17 – 2.98 au |
| Eccentricity | 0.157 |
| Inclination | 7.76° |
| Closest distance between its orbit and Earth's (MOID) | 1.18 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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