(31931) Sipiera Main-belt Asteroid
Discovered on 10 April 2000 by P. G. Comba at Prescott.
Paul P. Sipiera (b. 1948) is a professor of geology and astronomy at Harper College and president of the Planetary Studies Foundation. He has led three expeditions to Antarctica in search of meteorites and has classified more than 200 such objects.Naming citation (20040504/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Sipiera is today
Seen from above the solar system on 2026-10-14: Sipiera is 2.79 au from the Sun and 2.65 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 31931 |
| Provisional designation | 2000 GW82 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.08 km (#12,538 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0730 |
| Absolute magnitude (H) | 15.71 |
| Orbital period | 4.08 years |
| Semi-major axis | 2.55 au |
| Perihelion – aphelion | 1.91 – 3.19 au |
| Eccentricity | 0.251 |
| Inclination | 1.15° |
| Closest distance between its orbit and Earth's (MOID) | 0.900 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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