(4911) Rosenzweig Main-belt Asteroid
Discovered on 16 October 1953 by Indiana University at Brooklyn.
“Pioneers of the Zone”, Jack (1919-1994) and Marcelle (b. 1929) Rosenzweig worked to help the Puerto Ordaz region of Venezuela. They built and operated a plant to make ice blocks for delivery to the mines. They manufactured baseball bats and furniture accessories from Belgian wood and opened a real estate company.Naming citation (20000726/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Rosenzweig is today
Seen from above the solar system on 2026-10-14: Rosenzweig is 2.27 au from the Sun and 1.54 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4911 |
| Provisional designation | 1953 UD |
| Orbit class | Main-belt Asteroid |
| Diameter | 9.97 km (#5,112 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.309 |
| Rotation period | 9.75 hours |
| Absolute magnitude (H) | 12.13 |
| Orbital period | 4.28 years |
| Semi-major axis | 2.64 au |
| Perihelion – aphelion | 2.16 – 3.11 au |
| Eccentricity | 0.180 |
| Inclination | 13.0° |
| Closest distance between its orbit and Earth's (MOID) | 1.17 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.