(9261) Peggythomson Main-belt Asteroid
Discovered on 8 October 1953 by Indiana University at Brooklyn.
Peggy Y. Thomson (b. 1927) was responsible for a major gift to Indiana University from a charitable trust that allowed the Daniel Kirkwood professorship to be fully endowed as a chair of astronomy. The name was suggested by F. K. Edmondson, whose elementary astronomy course inspired Thomson when she was a student.Naming citation (20050523/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Peggythomson is today
Seen from above the solar system on 2026-10-14: Peggythomson is 1.98 au from the Sun and 1.57 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9261 |
| Provisional designation | 1953 TD1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.71 km (#13,437 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.353 |
| Absolute magnitude (H) | 14.26 |
| Orbital period | 3.46 years |
| Semi-major axis | 2.29 au |
| Perihelion – aphelion | 1.91 – 2.66 au |
| Eccentricity | 0.163 |
| Inclination | 4.54° |
| Closest distance between its orbit and Earth's (MOID) | 0.918 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Peggy
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