(20548) Milewski Main-belt Asteroid
Discovered on 8 September 1999 by LINEAR at Socorro.
Dave Gerald Milewski (b. 1987) is an American astronomer who worked on active small bodies in the solar system using ground and WISE/NEOWISE observations. He is actively engaged in outreach events for astronomy.Naming citation (WGSBN Bull. 6, #11, 26), IAU / Minor Planet Center, via NASA/JPL
Where Milewski is today
Seen from above the solar system on 2026-10-14: Milewski is 3.53 au from the Sun and 3.62 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20548 |
| Provisional designation | 1999 RM107 |
| Orbit class | Main-belt Asteroid |
| Diameter | 9.03 km (#5,739 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0790 |
| Absolute magnitude (H) | 13.86 |
| Orbital period | 5.70 years |
| Semi-major axis | 3.19 au |
| Perihelion – aphelion | 2.74 – 3.64 au |
| Eccentricity | 0.141 |
| Inclination | 1.91° |
| Closest distance between its orbit and Earth's (MOID) | 1.76 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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