(21008) Ottewell Main-belt Asteroid
Discovered on 9 August 1988 by E. F. Helin at Palomar.
Guy Ottewell (b. 1936) is a British educator who published his Astronomical Calendar every year from 1974 to 2026. These featured Ottewell’s immersive illustrations depicting the celestial sphere and the motions of heavenly bodies for the coming year. His passion, skill, artistry, and dedication to astronomy have been lauded by devoted followers worldwide.Naming citation (WGSBN Bull. 6, #10, 9), IAU / Minor Planet Center, via NASA/JPL
Where Ottewell is today
Seen from above the solar system on 2026-10-14: Ottewell is 2.03 au from the Sun and 2.97 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21008 |
| Provisional designation | 1988 PE |
| Orbit class | Main-belt Asteroid |
| Rotation period | 2.81 hours |
| Absolute magnitude (H) | 14.4 |
| Orbital period | 3.52 years |
| Semi-major axis | 2.31 au |
| Perihelion – aphelion | 1.70 – 2.93 au |
| Eccentricity | 0.265 |
| Inclination | 9.20° |
| Closest distance between its orbit and Earth's (MOID) | 0.696 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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