(124075) Ketelsen Main-belt Asteroid
Discovered on 15 April 2001 by D. Healy at Junk Bond.
Optician Dean Ketelsen (b. 1953), senior research specialist at the University of Arizona's Steward Mirror Laboratory, has supervised the fabrication of large telescope primaries since 1984. A past president of the Tucson Amateur Astronomy associates, he has organized the Grand Canyon Star Party since 1991.Naming citation (20070601/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Ketelsen is today
Seen from above the solar system on 2026-10-14: Ketelsen is 2.65 au from the Sun and 2.50 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 124075 |
| Provisional designation | 2001 GT1 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.8 |
| Orbital period | 5.35 years |
| Semi-major axis | 3.06 au |
| Perihelion – aphelion | 2.61 – 3.51 au |
| Eccentricity | 0.147 |
| Inclination | 0.488° |
| Closest distance between its orbit and Earth's (MOID) | 1.63 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.