(550034) Reitsam Main-belt Asteroid
Discovered on 22 December 2011 by C. Rinner at Oukaimeden.
Robert Reitsam (b. 1963) is a German engineer and has been a planetary observer since 1978. His specialty is high-resolution imaging of the planets with CCD and CMOS sensors. During Robert's visit to Oukaïmeden Observatory in 2025 he investigated the thermal behavior of the observatory's dome and made proposals for improvements.Naming citation (WGSBN Bull. 6, #3, 13), IAU / Minor Planet Center, via NASA/JPL
Where Reitsam is today
Seen from above the solar system on 2026-10-14: Reitsam is 3.33 au from the Sun and 4.11 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 550034 |
| Provisional designation | 2011 YA4 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 17.87 |
| Orbital period | 4.41 years |
| Semi-major axis | 2.69 au |
| Perihelion – aphelion | 1.95 – 3.43 au |
| Eccentricity | 0.273 |
| Inclination | 7.31° |
| Closest distance between its orbit and Earth's (MOID) | 0.977 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Robert
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- (5585) Parks
- (5636) Jacobson
- (5739) Robertburns
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All asteroids named after someone called Robert