(153284) Frieman Main-belt Asteroid
Discovered on 21 February 2001 by Sloan Digital Sky Survey at Apache Point.
Joshua Frieman (b. 1959) is an American astronomer and a contributor to the Sloan Digital Sky Survey. He is known for his work on inflation, large-scale structure, and dark energy and for his leadership of the Dark Energy Survey.Naming citation (20120406/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Frieman is today
Seen from above the solar system on 2026-10-14: Frieman is 3.21 au from the Sun and 2.57 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 153284 |
| Provisional designation | 2001 DU109 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.26 |
| Orbital period | 5.30 years |
| Semi-major axis | 3.04 au |
| Perihelion – aphelion | 2.73 – 3.35 au |
| Eccentricity | 0.103 |
| Inclination | 6.77° |
| Closest distance between its orbit and Earth's (MOID) | 1.73 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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