(9929) McConnell Main-belt Asteroid
Discovered on 24 February 1982 by Oak Ridge Observatory at Harvard.
John C. McConnell (b. 1946) writes on the history of astronomy, and his photographic archive is much used by historians of science. Currently chairman of the East Antrim Astronomical Society, he was the 1999 recipient of the FitzGerald Medal of the Irish Astronomical Association for his popularization of astronomy.Naming citation (20010509/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where McConnell is today
Seen from above the solar system on 2026-10-14: McConnell is 2.06 au from the Sun and 2.87 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9929 |
| Provisional designation | 1982 DP1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.50 km (#13,949 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.300 |
| Rotation period | 105 hours |
| Absolute magnitude (H) | 14.56 |
| Orbital period | 3.44 years |
| Semi-major axis | 2.28 au |
| Perihelion – aphelion | 1.96 – 2.59 au |
| Eccentricity | 0.137 |
| Inclination | 6.01° |
| Closest distance between its orbit and Earth's (MOID) | 0.989 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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