(21537) Frechet Main-belt Asteroid
Discovered on 15 August 1998 by P. G. Comba at Prescott.
Maurice Fréchet (1878-1973), a student of Hadamard and graduate of the École Normale Supérieure, was a pioneer in the study of the point set topology of abstract spaces and of functionals defined thereon. He introduced, among others, the concepts of compactness, completeness and separability.Naming citation (20010509/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Frechet is today
Seen from above the solar system on 2026-10-14: Frechet is 3.49 au from the Sun and 2.62 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21537 |
| Provisional designation | 1998 PQ |
| Orbit class | Main-belt Asteroid |
| Rotation period | 5.02 hours |
| Absolute magnitude (H) | 14.33 |
| Orbital period | 5.39 years |
| Semi-major axis | 3.07 au |
| Perihelion – aphelion | 2.64 – 3.50 au |
| Eccentricity | 0.140 |
| Inclination | 1.18° |
| Closest distance between its orbit and Earth's (MOID) | 1.63 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Maurice
All asteroids named after someone called Maurice