(5109) Robertmiller Main-belt Asteroid
Discovered on 13 September 1987 by H. Debehogne at La Silla.
Robert J. Miller (b. 1950), astronomer at the U.S. Naval Observatory since 1972, worked on the six-inch transit circle programs and became one of the most prolific observers in that telescope's 100-year history. From 1996 until his retirement on 2006 Jan. 2 he worked in the Nautical Almanac Office.Naming citation (20051215/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Robertmiller is today
Seen from above the solar system on 2026-10-14: Robertmiller is 2.09 au from the Sun and 3.04 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5109 |
| Provisional designation | 1987 RM1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.72 km (#11,196 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.288 |
| Absolute magnitude (H) | 13.87 |
| Orbital period | 3.35 years |
| Semi-major axis | 2.24 au |
| Perihelion – aphelion | 2.09 – 2.39 au |
| Eccentricity | 0.0654 |
| Inclination | 3.58° |
| Closest distance between its orbit and Earth's (MOID) | 1.09 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Robert
- (1955) McMath
- (3514) Hooke
- (3875) Staehle
- (4564) Clayton
- (4809) Robertball
- (5308) Hutchison
- (5477) Holmes
- (5585) Parks
- (5636) Jacobson
- (5739) Robertburns
- (5817) Robertfrazer
- (5871) Bobbell
All asteroids named after someone called Robert