(826870) Iancooper Main-belt Asteroid
Discovered on 5 August 1991 by D. M. Rehner at Cerro Tololo.
Ian Cooper (b. 1955) is an American amateur astronomer and a lifelong member of the Chagrin Valley Astronomical Society. He was instrumental in securing the land for the society's Indian Hill Observatory. Ian worked at NASA/Goddard Space Flight Center on the Landsat and Hubble Space Telescope projects during the 1980s and 1990s.Naming citation (WGSBN Bull. 6, #6, 13), IAU / Minor Planet Center, via NASA/JPL
Where Iancooper is today
Seen from above the solar system on 2026-10-14: Iancooper is 3.06 au from the Sun and 4.05 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 826870 |
| Provisional designation | 1991 PN |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 16.89 |
| Orbital period | 5.21 years |
| Semi-major axis | 3.00 au |
| Perihelion – aphelion | 2.71 – 3.30 au |
| Eccentricity | 0.0977 |
| Inclination | 9.11° |
| Closest distance between its orbit and Earth's (MOID) | 1.71 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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All asteroids named after someone called Ian