(243320) Jackuipers Outer Main-belt Asteroid
Discovered on 24 September 2008 by Calvin College at Calvin-Rehoboth.
Jack Kuipers (b. 1921), author of a text on quaternions, taught mathematics at Calvin College for 20 years after a 17-year engineering career in the aerospace industry.Naming citation (20101128/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Jackuipers is today
Seen from above the solar system on 2026-10-14: Jackuipers is 3.18 au from the Sun and 2.66 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 243320 |
| Provisional designation | 2008 SG12 |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 5.81 km (#9,206 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0400 |
| Absolute magnitude (H) | 15.3 |
| Orbital period | 6.19 years |
| Semi-major axis | 3.37 au |
| Perihelion – aphelion | 3.11 – 3.63 au |
| Eccentricity | 0.0773 |
| Inclination | 7.62° |
| Closest distance between its orbit and Earth's (MOID) | 2.10 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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