| Name of Satellite, Alternate Names | Skynet 4C |
| Country of Operator/Owner | United Kingdom |
| Operator/Owner | Intelsat/Paradigm Secure Communications (wholly owned by EADS Astrium) |
| Users | Military |
| Purpose | Communications |
| Class of Orbit | GEO |
| Type of Orbit | |
| Longitude of GEO (degrees) | -1.3 |
| Perigee (km) | 35775 |
| Apogee (km) | 35797 |
| Eccentricity | 0.000260935572634975 |
| Inclination (degrees) | 9.43 |
| Period (minutes) | 1436.07 |
| Launch Mass (kg.) | 1474 |
| Dry Mass (kg.) | 850 |
| Power (watts) | 1200 |
| Date of Launch | 30-08-1990 |
| Expected Lifetime | 7 yrs. |
| Contractor | Astrium |
| Country of Contractor | France/UK/Germany |
| Launch Site | Guiana Space Center |
| Launch Vehicle | Ariane 44LP |
| COSPAR Number | 1990-079A |
| NORAD Number | 20776 |
| Comments | Spare. In March 2010 it was announced that the satellite would supplement communications at Antarctica. |