| Official name | THOR DELTA 1 R/B |
| Alternative name | DELTA P (Delta 2310) |
| Cospar ID | 1981-100C |
| Norad ID | 12889 |
| Launch date | 1981-10-06 |
| Launch site | AFWTR |
| Launch vehicle | Delta-2310 |
| RCS size | LARGE |
| Decay date | ON ORBIT |
| Period (min) | 118.05 |
| Inclination (deg) | 99.91 |
| Perigee (km) | 550 |
| Apogee (km) | 2636 |
| Eccentricity | 0.65473948524796 |
| Mean motion (revs. per day) | 12.1982210927573 |
| Semi-Major axis (km) | 7971.135 |
| Raan (deg) | 81.6168 |
| Arg of perigee (deg) | 335.4087 |
| Shape | Cyl + 1 Nozzle |
| Mass (kg) | 346.88 |
| Diameter (m) | 1.4 |
| Height (m) | 6.39 |
| Span (m^2) | 6.39 |
