|
Discovery and designation
|
|
|---|---|
| Discovered by | Lincoln Laboratory Near-Earth Asteroid Research Team |
| Discovery site | Socorro |
| Discovery date | September 7, 1999 |
|
Designations
|
|
| MPC designation | 20533 |
| Alternate name(s) | 1999 RO72 |
| Epoch May 14, 2008 | |
| Ap | 3.1714066 |
| Peri | 2.6729728 |
| Eccentricity | 0.0852843 |
| Orbital period | 1824.5720593 |
| Mean anomaly | 314.54644 |
| Inclination | 3.15044 |
| Longitude of ascending node | 112.60714 |
| Argument of peri | 176.25493 |
| Absolute magnitude (H) | 14.3 |
20533 Irmabonham (1999 RO72) is a main-belt asteroid discovered on September 7, 1999 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.