| Official name | IUS R/B(2) |
| Alternative name | IUS second stage (IUS-5 SRM-2, Orbus 6E) (Discovery (OV-103)) |
| Cospar ID | 1989-090D |
| Norad ID | 20357 |
| Launch date | 1989-11-23 |
| Launch site | AFETR |
| Launch vehicle | Shuttle |
| RCS size | UNKNOWN |
| Decay date | ON ORBIT |
| Period (min) | 1446.96 |
| Inclination (deg) | 17.52 |
| Perigee (km) | 34578 |
| Apogee (km) | 37420 |
| Eccentricity | 0.0394733187032973 |
| Mean motion (revs. per day) | 0.995189915408857 |
| Semi-Major axis (km) | 42377.135 |
| Raan (deg) | 346.3044 |
| Arg of perigee (deg) | 92.1826 |
| Shape | Cyl |
| Mass (kg) | 1139.74 |
| Diameter (m) | 2.9 |
| Height (m) | 2.1 |
| Span (m^2) | 2.9 |
