| Official name | DELTA 2 R/B |
| Alternative name | Delta II second stage (Delta 7925) |
| Cospar ID | 1991-001B |
| Norad ID | 21048 |
| Launch date | 1991-01-08 |
| Launch site | AFETR |
| Launch vehicle | Delta-7925 |
| RCS size | LARGE |
| Decay date | ON ORBIT |
| Period (min) | 121.48 |
| Inclination (deg) | 18.46 |
| Perigee (km) | 781 |
| Apogee (km) | 2713 |
| Eccentricity | 0.552947910704064 |
| Mean motion (revs. per day) | 11.8538030951597 |
| Semi-Major axis (km) | 8125.135 |
| Raan (deg) | 209.339 |
| Arg of perigee (deg) | 227.3787 |
| Shape | Cyl + Cone |
| Mass (kg) | 942.52 |
| Diameter (m) | 2.44 |
| Height (m) | 5.97 |
| Span (m^2) | 5.97 |
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